.btn {
    font-family: "Nunito", sans-serif;
    font-weight: 800;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
}

.btn:active { transform: scale(0.95); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #2196F3);
    color: #fff;
    padding: 12px 28px;
    box-shadow: 0 8px 22px rgba(33,150,243,0.3);
}

.btn-secondary {
    background: var(--bg-card-light);
    color: var(--text-bright);
    padding: 10px 22px;
}

.btn-sm { padding: 8px 16px; font-size: 0.9rem; border-radius: 10px; }

.history-filter-btn {
    background: var(--bg-card-light);
    color: var(--text-secondary);
    border: 1px solid var(--text-dim);
    transition: all 0.2s ease;
}
.history-filter-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}
.history-filter-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
    color: white;
    border: none;
    font-weight: 600;
}

.btn-next {
    background: linear-gradient(135deg, var(--accent-green), #00BFA5);
    color: #fff;
    font-size: 1.1rem;
    padding: 14px 32px;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(6, 214, 160, 0.4);
    margin-top: 16px;
    animation: pulse-next 2s ease-in-out infinite;
}

.btn-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(6, 214, 160, 0.5);
}

@keyframes pulse-next {
    0%, 100% { box-shadow: 0 8px 24px rgba(6, 214, 160, 0.4); }
    50% { box-shadow: 0 8px 32px rgba(6, 214, 160, 0.6); }
}

.view { display: none; animation: fadeSlide 0.4s ease; }
.view.active { display: block; }

@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

.section {
    background: var(--bg-card);
    border-radius: 26px;
    padding: 28px;
    margin-bottom: 20px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    box-sizing: border-box;
    max-width: 100%;
}

.section-title {
    font-size: 1.3rem;
    font-weight: 900;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.1), rgba(124, 58, 237, 0.1));
    border: 1px solid rgba(76, 201, 240, 0.3);
    font-family: inherit;
}
.dark .breadcrumb-nav, .dark-theme .breadcrumb-nav {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.2), rgba(124, 58, 237, 0.15));
    border-color: rgba(76, 201, 240, 0.4);
}

/* Domain selector styling */
#domainSelect {
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(76, 201, 240, 0.1) 100%);
    font-weight: 600;
    border: 2px solid var(--accent-cyan);
}
#domainSelect:focus {
    box-shadow: 0 0 0 3px rgba(76, 201, 240, 0.3);
}

/* Domain color coding for optgroups */
#categorySelect optgroup {
    font-weight: 700;
    font-style: normal;
    background: rgba(0,0,0,0.05);
}

/* Colorful dashboard sections */
.dashboard-history {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.12) 0%, rgba(6, 214, 160, 0.08) 100%);
    border: 2px solid rgba(76, 201, 240, 0.25);
}
.dashboard-streak {
    background: linear-gradient(135deg, rgba(255, 159, 28, 0.12) 0%, rgba(255, 107, 107, 0.08) 100%);
    border: 2px solid rgba(255, 159, 28, 0.25);
}
.dashboard-badges {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.12) 0%, rgba(255, 215, 0, 0.08) 100%);
    border: 2px solid rgba(124, 58, 237, 0.25);
}

/* Dark mode dashboard sections */
.dark .dashboard-history, .dark-theme .dashboard-history {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.18) 0%, rgba(6, 214, 160, 0.12) 100%);
}
.dark .dashboard-streak, .dark-theme .dashboard-streak {
    background: linear-gradient(135deg, rgba(255, 159, 28, 0.18) 0%, rgba(255, 107, 107, 0.12) 100%);
}
.dark .dashboard-badges, .dark-theme .dashboard-badges {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.18) 0%, rgba(255, 215, 0, 0.12) 100%);
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.menu-item {
    background: var(--bg-card-light);
    border-radius: 18px;
    padding: 20px 22px;
    min-width: 260px;
}

/* Colorful gradient backgrounds for menu items - kid friendly! */
.menu-item:nth-child(1) {
    background: linear-gradient(135deg, rgba(255, 159, 28, 0.15) 0%, rgba(255, 107, 107, 0.12) 100%);
    border: 2px solid rgba(255, 159, 28, 0.3);
}
.menu-item:nth-child(2) {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.15) 0%, rgba(124, 58, 237, 0.12) 100%);
    border: 2px solid rgba(76, 201, 240, 0.3);
}
.menu-item:nth-child(3) {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.15) 0%, rgba(8, 145, 178, 0.12) 100%);
    border: 2px solid rgba(6, 214, 160, 0.3);
}
.menu-item:nth-child(4) {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 159, 28, 0.12) 100%);
    border: 2px solid rgba(255, 215, 0, 0.3);
}
.menu-item:nth-child(5) {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.15) 0%, rgba(255, 159, 28, 0.12) 100%);
    border: 2px solid rgba(255, 107, 107, 0.3);
}
.menu-item:nth-child(6) {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.15) 0%, rgba(76, 201, 240, 0.12) 100%);
    border: 2px solid rgba(124, 58, 237, 0.3);
}
.menu-item:nth-child(7) {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.15) 0%, rgba(6, 214, 160, 0.12) 100%);
    border: 2px solid rgba(8, 145, 178, 0.3);
}
.menu-item:nth-child(8) {
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.15) 0%, rgba(236, 72, 153, 0.12) 100%);
    border: 2px solid rgba(147, 51, 234, 0.3);
}
.menu-item:nth-child(9) {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, rgba(6, 214, 160, 0.12) 100%);
    border: 2px solid rgba(34, 197, 94, 0.3);
}

/* Dark mode adjustments for menu items */
.dark .menu-item:nth-child(1), .dark-theme .menu-item:nth-child(1) {
    background: linear-gradient(135deg, rgba(255, 159, 28, 0.2) 0%, rgba(255, 107, 107, 0.15) 100%);
}
.dark .menu-item:nth-child(2), .dark-theme .menu-item:nth-child(2) {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.2) 0%, rgba(124, 58, 237, 0.15) 100%);
}
.dark .menu-item:nth-child(3), .dark-theme .menu-item:nth-child(3) {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.2) 0%, rgba(8, 145, 178, 0.15) 100%);
}
.dark .menu-item:nth-child(4), .dark-theme .menu-item:nth-child(4) {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2) 0%, rgba(255, 159, 28, 0.15) 100%);
}
.dark .menu-item:nth-child(5), .dark-theme .menu-item:nth-child(5) {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.2) 0%, rgba(255, 159, 28, 0.15) 100%);
}
.dark .menu-item:nth-child(6), .dark-theme .menu-item:nth-child(6) {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2) 0%, rgba(76, 201, 240, 0.15) 100%);
}
.dark .menu-item:nth-child(7), .dark-theme .menu-item:nth-child(7) {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.2) 0%, rgba(6, 214, 160, 0.15) 100%);
}
.dark .menu-item:nth-child(8), .dark-theme .menu-item:nth-child(8) {
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.2) 0%, rgba(236, 72, 153, 0.15) 100%);
}
.dark .menu-item:nth-child(9), .dark-theme .menu-item:nth-child(9) {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.2) 0%, rgba(6, 214, 160, 0.15) 100%);
}

.menu-label {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-dim);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown {
    width: 100%;
    min-width: 100%;
    border: 2px solid transparent;
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-bright);
    padding: 14px 18px;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 3px 12px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: border 0.2s ease, box-shadow 0.2s ease;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown option {
    white-space: normal;
    word-wrap: break-word;
    padding: 10px 12px;
}

/* Category dropdown - orange/pink theme */
#categorySelect option:nth-child(odd) { background: #ffd4a3; color: #663300; }
#categorySelect option:nth-child(even) { background: #ffc4b3; color: #661100; }

/* Skill dropdown - cyan/purple theme */
#skillSelect option:nth-child(odd) { background: #a8e0f5; color: #004466; }
#skillSelect option:nth-child(even) { background: #d0b8f5; color: #330066; }

/* Max Number dropdown - green/teal theme */
#rangeSelect option:nth-child(odd) { background: #9ff5d8; color: #004433; }
#rangeSelect option:nth-child(even) { background: #a8e8e0; color: #003344; }

/* Decimals dropdown - gold/orange theme */
#decimalSelect option:nth-child(odd) { background: #ffe88c; color: #664400; }
#decimalSelect option:nth-child(even) { background: #ffd4a3; color: #663300; }

/* Timer dropdown - pink/orange theme */
#timerSelect option:nth-child(odd) { background: #ffb8b8; color: #660000; }
#timerSelect option:nth-child(even) { background: #ffd4a3; color: #663300; }

/* Problems dropdown - purple/pink theme */
#problemCountSelect option:nth-child(odd) { background: #e8b8f5; color: #4a0066; }
#problemCountSelect option:nth-child(even) { background: #f5b8d8; color: #66004a; }

/* Dark mode dropdown options - lighter, more vibrant colors */
.dark .dropdown option, .dark-theme .dropdown option {
    color: #F7FAFC;
}

/* Category dropdown - orange/pink theme (dark mode) */
.dark #categorySelect option:nth-child(odd), .dark-theme #categorySelect option:nth-child(odd) {
    background: #d97c3a; color: #1a1410;
}
.dark #categorySelect option:nth-child(even), .dark-theme #categorySelect option:nth-child(even) {
    background: #d96a5a; color: #1a1210;
}

/* Skill dropdown - cyan/purple theme (dark mode) */
.dark #skillSelect option:nth-child(odd), .dark-theme #skillSelect option:nth-child(odd) {
    background: #4aa8d8; color: #0a1820;
}
.dark #skillSelect option:nth-child(even), .dark-theme #skillSelect option:nth-child(even) {
    background: #8a6ad8; color: #1a1428;
}

/* Max Number dropdown - green/teal theme (dark mode) */
.dark #rangeSelect option:nth-child(odd), .dark-theme #rangeSelect option:nth-child(odd) {
    background: #3ac89a; color: #0a1a14;
}
.dark #rangeSelect option:nth-child(even), .dark-theme #rangeSelect option:nth-child(even) {
    background: #3ab8b0; color: #0a1818;
}

/* Decimals dropdown - gold/orange theme (dark mode) */
.dark #decimalSelect option:nth-child(odd), .dark-theme #decimalSelect option:nth-child(odd) {
    background: #e8c84a; color: #1a1408;
}
.dark #decimalSelect option:nth-child(even), .dark-theme #decimalSelect option:nth-child(even) {
    background: #d97c3a; color: #1a1410;
}

/* Timer dropdown - pink/orange theme (dark mode) */
.dark #timerSelect option:nth-child(odd), .dark-theme #timerSelect option:nth-child(odd) {
    background: #d86a8a; color: #1a1014;
}
.dark #timerSelect option:nth-child(even), .dark-theme #timerSelect option:nth-child(even) {
    background: #d97c3a; color: #1a1410;
}

/* Problems dropdown - purple/pink theme (dark mode) */
.dark #problemCountSelect option:nth-child(odd), .dark-theme #problemCountSelect option:nth-child(odd) {
    background: #a855f7; color: #1a0a28;
}
.dark #problemCountSelect option:nth-child(even), .dark-theme #problemCountSelect option:nth-child(even) {
    background: #ec4899; color: #280a1a;
}

.dropdown:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px var(--shadow-glow);
}

.mode-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.mode-card {
    background: var(--bg-card-light);
    border-radius: 18px;
    padding: 22px 14px;
    text-align: center;
    cursor: pointer;
    border: 3px solid transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* Colorful gradient backgrounds for mode cards - kid friendly! */
.mode-card:nth-child(1) {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.18) 0%, rgba(76, 201, 240, 0.12) 100%);
    border-color: rgba(6, 214, 160, 0.35);
}
.mode-card:nth-child(2) {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.18) 0%, rgba(255, 159, 28, 0.12) 100%);
    border-color: rgba(255, 107, 107, 0.35);
}
.mode-card:nth-child(3) {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.18) 0%, rgba(124, 58, 237, 0.12) 100%);
    border-color: rgba(76, 201, 240, 0.35);
}
.mode-card:nth-child(4) {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.18) 0%, rgba(255, 159, 28, 0.12) 100%);
    border-color: rgba(255, 215, 0, 0.35);
}
.mode-card:nth-child(5), .mixed-mode-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2) 0%, rgba(236, 72, 153, 0.15) 100%);
    border-color: rgba(124, 58, 237, 0.4);
}

/* Dark mode adjustments for mode cards */
.dark .mode-card:nth-child(1), .dark-theme .mode-card:nth-child(1) {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.22) 0%, rgba(76, 201, 240, 0.15) 100%);
}
.dark .mode-card:nth-child(2), .dark-theme .mode-card:nth-child(2) {
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.22) 0%, rgba(255, 159, 28, 0.15) 100%);
}
.dark .mode-card:nth-child(3), .dark-theme .mode-card:nth-child(3) {
    background: linear-gradient(135deg, rgba(76, 201, 240, 0.22) 0%, rgba(124, 58, 237, 0.15) 100%);
}
.dark .mode-card:nth-child(4), .dark-theme .mode-card:nth-child(4) {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.22) 0%, rgba(255, 159, 28, 0.15) 100%);
}
.dark .mode-card:nth-child(5), .dark-theme .mode-card:nth-child(5),
.dark .mixed-mode-card, .dark-theme .mixed-mode-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.28) 0%, rgba(236, 72, 153, 0.2) 100%);
}

.mode-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.12);
}

.mode-card.selected {
    border-color: var(--accent-cyan) !important;
    box-shadow: 0 0 0 3px var(--shadow-glow), 0 8px 20px rgba(0,0,0,0.1);
}

.mode-icon { font-size: 2.3rem; margin-bottom: 10px; display: block; }
.mode-name { font-weight: 800; font-size: 1.05rem; }

/* Mixed Mode Play/Settings Card Styles */
.mixed-play-card {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.22) 0%, rgba(76, 201, 240, 0.18) 100%) !important;
    border-color: rgba(6, 214, 160, 0.45) !important;
}
.mixed-play-card:hover {
    border-color: var(--accent-green) !important;
    box-shadow: 0 12px 28px rgba(6, 214, 160, 0.35);
}
.mixed-settings-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2) 0%, rgba(236, 72, 153, 0.15) 100%) !important;
    border-color: rgba(124, 58, 237, 0.4) !important;
}
.mixed-settings-card:hover {
    border-color: var(--accent-purple) !important;
    box-shadow: 0 12px 28px rgba(124, 58, 237, 0.35);
}
.dark .mixed-play-card, .dark-theme .mixed-play-card {
    background: linear-gradient(135deg, rgba(6, 214, 160, 0.28) 0%, rgba(76, 201, 240, 0.22) 100%) !important;
}
.dark .mixed-settings-card, .dark-theme .mixed-settings-card {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.28) 0%, rgba(236, 72, 153, 0.2) 100%) !important;
}
.mixed-saved-indicator {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-green);
    margin-top: 6px;
    opacity: 0.9;
}
.mixed-play-card.no-saved {
    opacity: 0.6;
    pointer-events: auto;
}
.mixed-play-card.has-saved .mixed-saved-indicator {
    display: block !important;
}

/* Play Mixed Popup Styles */
.play-mixed-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}
.play-mixed-popup-content {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 28px;
    max-width: 380px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
    animation: slideUp 0.3s ease;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.play-mixed-popup-content h3 {
    margin: 0 0 20px 0;
    font-size: 1.3rem;
    color: var(--accent-purple);
    text-align: center;
}
.popup-close-btn {
    position: absolute;
    top: 12px;
    right: 14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card-light);
    color: var(--text-dim);
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}
.popup-close-btn:hover {
    background: var(--incorrect);
    color: white;
}
.popup-option {
    margin-bottom: 16px;
    text-align: center;
}
.popup-btn {
    width: 100%;
    padding: 14px 20px;
    font-size: 1.05rem;
}
.popup-btn-sm {
    padding: 10px 16px;
    font-size: 0.95rem;
}
.popup-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 8px;
}
.popup-hint.has-settings {
    color: var(--accent-green);
    font-weight: 600;
}
.popup-settings-summary {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 18px;
    border: 1px solid var(--bg-tertiary);
}
.popup-settings-summary.has-settings {
    border-color: var(--accent-green);
    background: rgba(34, 197, 94, 0.08);
}
.dark .popup-settings-summary.has-settings {
    background: rgba(34, 197, 94, 0.12);
}
.settings-summary-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.settings-status {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-dim);
}
.popup-settings-summary.has-settings .settings-status {
    color: var(--accent-green);
}
.settings-summary-details {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.5;
}
.settings-summary-details .skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 6px;
}
.settings-summary-details .skill-tag {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.settings-summary-details .settings-meta {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--text-dim);
}
/* Student Choice Modal Styles */
.student-choice-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
}
.student-choice-content {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 28px;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    animation: popIn 0.3s ease-out;
}
.student-choice-content h3 {
    text-align: center;
    margin: 0 0 16px 0;
    font-size: 1.4rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.student-choice-summary {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: center;
}
.student-choice-section {
    margin-bottom: 20px;
}
.choice-label {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    text-align: center;
}
.student-mode-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}
.student-mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px 12px;
    border: 2px solid var(--bg-tertiary);
    border-radius: 14px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}
.student-mode-btn:hover {
    border-color: var(--accent-purple);
    transform: translateY(-2px);
}
.student-mode-btn.selected {
    border-color: var(--accent-green);
    background: rgba(34, 197, 94, 0.15);
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}
.student-mode-btn .mode-emoji {
    font-size: 1.8rem;
    margin-bottom: 6px;
}
.student-mode-btn .mode-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}
.student-timer-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}
.student-timer-btn {
    padding: 10px 16px;
    border: 2px solid var(--bg-tertiary);
    border-radius: 10px;
    background: var(--bg-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}
.student-timer-btn:hover {
    border-color: var(--accent-purple);
}
.student-timer-btn.selected {
    border-color: var(--accent-green);
    background: rgba(34, 197, 94, 0.15);
}
.student-play-btn {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.15rem;
    margin-top: 10px;
}
.student-play-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.popup-divider {
    text-align: center;
    color: var(--text-dim);
    font-weight: 600;
    margin: 16px 0;
    position: relative;
}
.popup-divider::before,
.popup-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 35%;
    height: 1px;
    background: var(--text-dim);
    opacity: 0.3;
}
.popup-divider::before { left: 0; }
.popup-divider::after { right: 0; }
.popup-label {
    display: block;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-align: left;
}
.popup-code-row {
    display: flex;
    gap: 10px;
}
.popup-code-input {
    flex: 1;
    padding: 12px 14px;
    border-radius: 12px;
    border: 2px solid var(--text-dim);
    background: var(--bg-card-light);
    color: var(--text-bright);
    font-size: 1rem;
    font-family: "JetBrains Mono", monospace;
    transition: border 0.2s ease;
}
.popup-code-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}
.popup-code-input.error {
    border-color: var(--incorrect);
    animation: shake 0.3s ease;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}
#lastSettingsOption.disabled .popup-btn {
    opacity: 0.5;
    cursor: not-allowed;
}

.number-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.num-btn {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: none;
    font-weight: 800;
    background: var(--bg-card);
    color: var(--text-bright);
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    cursor: pointer;
    transition: transform 0.15s ease, background 0.15s ease;
}

.num-btn.selected {
    background: var(--accent-purple);
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(157,78,221,0.35);
}

.game-header {
    background: var(--bg-card);
    border-radius: 22px;
    padding: 16px 24px;
    margin-bottom: 20px;
    box-shadow: var(--card-shadow);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.timer-container { display: none; justify-content: center; margin-bottom: 20px; }

.timer-display {
    font-family: "JetBrains Mono", monospace;
    font-size: 2.3rem;
    font-weight: 800;
    color: var(--accent-orange);
    background: var(--bg-card);
    padding: 14px 28px;
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.2s ease, color 0.2s ease;
}

.timer-display.large {
    transform: scale(1.1);
    color: var(--incorrect);
    animation: pulseWarning 0.6s ease infinite;
}

.timer-display.timer-paused {
    color: var(--accent-cyan);
    opacity: 0.7;
    animation: timerPauseBlink 1.5s ease-in-out infinite;
}

@keyframes timerPauseBlink {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 0.4; }
}

@keyframes pulseWarning {
    0% { transform: scale(1.05); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1.05); }
}

.boss-arena {
    display: none;
    background: linear-gradient(180deg, #c7f9ff 0%, #f2fbff 100%);
    border-radius: 22px;
    height: 150px;
    margin-bottom: 18px;
    position: relative;
    overflow: hidden;
    border: 4px solid var(--bg-card);
    box-shadow: var(--card-shadow);
}

.dark-theme .boss-arena, .dark .boss-arena {
    background: linear-gradient(180deg, #1a202c, #2d3748);
}

.boss-track {
    position: absolute;
    bottom: 24px;
    left: 20px;
    right: 20px;
    height: 12px;
    background: rgba(0,0,0,0.15);
    border-radius: 6px;
}

.char-sprite {
    position: absolute;
    bottom: 40px;
    font-size: 3rem;
    transition: left 0.4s ease, right 0.4s ease, transform 0.4s ease;
}

.hero {
    left: 70%;
}

.monster {
    left: 10%;
    transform: scaleX(-1);
}

.boss-status,
.race-status {
    text-align: center;
    font-weight: 800;
    color: var(--accent-orange);
    margin-bottom: 10px;
    display: none;
}

.race-track-container {
    display: none;
    background: var(--bg-card-light);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 15px;
    box-shadow: var(--card-shadow);
}

.race-lane {
    position: relative;
    height: 42px;
    border-bottom: 2px dashed var(--text-dim);
    margin-bottom: 12px;
}

.race-car {
    position: absolute;
    bottom: 5px;
    font-size: 2rem;
    left: 0;
    transition: left 0.4s ease;
}

.finish-line {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    width: 6px;
    background: repeating-linear-gradient(45deg, black, black 6px, white 6px, white 12px);
}

.question-card {
    background: var(--bg-card);
    border-radius: 28px;
    padding: 36px;
    text-align: center;
    box-shadow: var(--card-shadow);
    position: relative;
}

.question-card.correct-bg {
    background: #E6FFFA;
    border: 2px solid var(--correct);
}

.dark-theme .question-card.correct-bg, .dark .question-card.correct-bg { background: #22543D; }

.question-card.incorrect-bg {
    background: #FFF0F0;
    border: 2px solid var(--incorrect);
}
.dark-theme .question-card.incorrect-bg, .dark .question-card.incorrect-bg { background: #3D2222; }

/* Correct answer slide transition */
@keyframes qSlideOut {
    from { transform: translateX(0); opacity: 1; }
    to   { transform: translateX(-60px); opacity: 0; }
}
@keyframes qSlideIn {
    from { transform: translateX(60px); opacity: 0; }
    to   { transform: translateX(0); opacity: 1; }
}
.question-card.q-slide-out {
    animation: qSlideOut 0.3s ease-in forwards;
    pointer-events: none;
}
.question-card.q-slide-in {
    animation: qSlideIn 0.3s ease-out forwards;
}
@media (prefers-reduced-motion: reduce) {
    .question-card.q-slide-out,
    .question-card.q-slide-in { animation: none; }
}

.question-text {
    font-family: "JetBrains Mono", monospace;
    font-size: clamp(2rem, 5vw, 3.3rem);
    font-weight: 900;
    margin: 12px 0 25px;
    color: var(--text-bright);
}

.question-number {
    position: absolute;
    top: 16px;
    left: 26px;
    font-weight: 800;
    color: var(--text-dim);
}

.visual-aid {
    display: none;
    margin: 0 auto 18px;
    max-width: 520px;
    text-align: center;
    background: var(--bg-card-light);
    border-radius: 16px;
    padding: 14px;
    color: var(--text-dim);
    font-weight: 700;
}

.answer-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.answer-btn {
    padding: 16px;
    border-radius: 18px;
    border: 2px solid transparent;
    background: var(--bg-card-light);
    font-size: 1.2rem;
    font-weight: 800;
    font-family: "JetBrains Mono", monospace;
    color: var(--text-bright);
    cursor: pointer;
    transition: transform 0.15s ease, border 0.15s ease;
}

.answer-btn:hover { transform: translateY(-3px); background: #fff; }
.answer-btn.correct { background: var(--correct); color: #013327; }
.answer-btn.incorrect { background: var(--incorrect); color: #fff; }

/* Proper stacked fraction display */
.frac {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 6px;
    line-height: 1;
    font-family: 'Times New Roman', Georgia, serif;
}
.frac .num {
    border-bottom: 2px solid currentColor;
    padding: 2px 8px 4px 8px;
    font-weight: 600;
    min-width: 1.2em;
    text-align: center;
}
.frac .den {
    padding: 4px 8px 2px 8px;
    font-weight: 600;
    min-width: 1.2em;
    text-align: center;
}
.frac-lg {
    font-size: 1.4rem;
}
.frac-lg .num, .frac-lg .den {
    padding: 3px 10px;
}
.frac-xl {
    font-size: 1.8rem;
}
.frac-xl .num {
    border-bottom-width: 3px;
    padding: 3px 12px 5px 12px;
}
.frac-xl .den {
    padding: 5px 12px 3px 12px;
}
.frac-2xl {
    font-size: 2.2rem;
}
.frac-2xl .num {
    border-bottom-width: 4px;
    padding: 4px 16px 6px 16px;
}
.frac-2xl .den {
    padding: 6px 16px 4px 16px;
}

/* Fraction with visual model container */
.frac-visual-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

/* Fraction circle (pie) visual */
.frac-circle {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-card-light, #e0e0e0);
    border: 3px solid var(--accent-cyan, #00bcd4);
    overflow: hidden;
}
.frac-circle-lg {
    width: 100px;
    height: 100px;
}
.frac-circle-sm {
    width: 60px;
    height: 60px;
}

/* Fraction bar (rectangular) visual - IXL STYLE with black borders */
.frac-bar-visual {
    display: flex;
    gap: 3px;
    padding: 8px;
    background: #fffde7; /* Light yellow background like IXL */
    border-radius: 10px;
    border: 2px solid #d4c85c;
}
.frac-bar-segment {
    height: 40px;
    min-width: 35px;
    border-radius: 5px;
    border: 2px solid #333;
    transition: all 0.3s ease;
}
.frac-bar-segment.filled {
    background: #d4e5f7; /* Light blue like IXL */
    border-color: #333;
}
.frac-bar-segment.filled-purple {
    background: #e8d4f0; /* Light purple like IXL */
    border-color: #333;
}
.frac-bar-segment.filled-pink {
    background: #f5d4e8; /* Light pink like IXL */
    border-color: #333;
}
.frac-bar-segment.empty {
    background: white;
    border-color: #333;
}

/* Fraction equation display */
.frac-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    border-radius: 16px;
    font-family: 'Times New Roman', Georgia, serif;
}
.frac-equation .frac-op {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-orange, #ff9800);
    min-width: 40px;
    text-align: center;
}
.frac-equation .frac-equals {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-green, #4caf50);
}
.frac-equation .frac-answer-box {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
}
.frac-equation .frac-answer-box .answer-num,
.frac-equation .frac-answer-box .answer-den {
    min-width: 40px;
    min-height: 1.5em;
    border: 2px dashed var(--accent-green, #4caf50);
    border-radius: 6px;
    background: rgba(76, 175, 80, 0.1);
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
}
.frac-equation .frac-answer-box .answer-bar {
    width: 100%;
    height: 3px;
    background: var(--accent-green, #4caf50);
    margin: 4px 0;
}

/* Visual comparison layout */
.frac-compare-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    padding: 20px;
}
.frac-compare-visual .frac-compare-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
}
.frac-compare-visual .compare-symbol {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent-orange, #ff9800);
    animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}
/* Math operation layout with fractions */
.math-expr {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    font-weight: 700;
}
.math-op {
    font-size: 1.5rem;
    color: var(--accent-orange);
}

.answer-input-area {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.answer-input {
    font-family: "JetBrains Mono", monospace;
    font-size: 2rem;
    font-weight: 700;
    padding: 12px 18px;
    text-align: center;
    background: var(--bg-card-light);
    border-radius: 16px;
    border: 3px solid transparent;
    color: var(--text-bright);
    min-width: 160px;
}

.answer-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: var(--bg-card);
    box-shadow: 0 0 0 4px var(--shadow-glow);
}

.feedback-area {
    display: none;
    border-radius: 14px;
    padding: 14px;
    font-weight: 800;
    margin-top: 10px;
}

.feedback-area.correct { background: rgba(6,214,160,0.15); color: var(--correct); }
.feedback-area.incorrect { background: rgba(239,71,111,0.15); color: var(--incorrect); }
.feedback-area.hint { background: rgba(255,159,28,0.15); color: var(--accent-orange); }

.next-btn-container {
    display: none;
    justify-content: center;
    margin-top: 20px;
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    align-items: start; /* Align cards to top so they don't stretch */
}

.problem-card {
    background: var(--bg-card);
    border-radius: 18px;
    padding: clamp(18px, 3vw, 28px);
    text-align: left;
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: auto; /* Let content determine height */
    height: fit-content;
    position: relative;
    overflow: hidden;
    max-width: 100%;
    box-sizing: border-box;
}

/* Allow hint popup to escape overflow:hidden */
.problem-card:has(.hint-popup.active) {
    overflow: visible;
}

/* Contain all visual content within card boundaries */
.problem-card svg {
    max-width: 100%;
    height: auto;
}

.problem-card > div:not(.hint-popup) {
    max-width: 100%;
    overflow: hidden;
    box-sizing: border-box;
}

.problem-card table {
    max-width: 100%;
    table-layout: auto;
}

/* Scale fraction bars to fit within card width */
.problem-card .frac-bar-visual {
    max-width: 100%;
    flex-wrap: wrap;
    box-sizing: border-box;
}

.problem-card .frac-bar-segment {
    min-width: 20px !important;
    width: auto !important;
    height: auto !important;
    aspect-ratio: 1;
    flex: 0 1 35px;
}

/* Scale inline flex/grid layouts within cards */
.problem-card [style*="display:flex"]:not(.hint-popup *):not(.hint-content),
.problem-card [style*="display: flex"]:not(.hint-popup *):not(.hint-content) {
    max-width: 100%;
    flex-wrap: wrap !important;
}

/* Magnify button for visual cards */
.ws-magnify-btn {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--accent-cyan);
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 10;
    padding: 0;
    line-height: 1;
}

.ws-magnify-btn:hover {
    opacity: 1;
    transform: scale(1.15);
}

/* Magnification modal overlay */
.ws-magnify-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    cursor: zoom-out;
}

.ws-magnify-content {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 30px;
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
    cursor: default;
}

.ws-magnify-content .frac-bar-segment {
    min-width: 35px !important;
    width: 40px !important;
    height: 40px !important;
    flex: none !important;
}

.ws-magnify-content svg {
    max-width: 100%;
    height: auto;
}

.ws-magnify-close {
    position: absolute;
    top: 10px;
    right: 14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--bg-card-light);
    color: var(--text-bright);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.ws-magnify-close:hover {
    background: #ff4444;
    color: #fff;
}

/* Cards with vertical/column format problems need more space */
.problem-card:has(.column-answer-input) {
    min-width: 300px;
}

/* Different card sizes based on content type */
.problem-card.card-simple {
    /* Simple text questions like "5 + 3 = ?" */
    min-height: 120px;
}

.problem-card.card-column {
    /* Column addition/subtraction with digit boxes */
    min-width: 320px;
    padding: 20px 24px;
}

.problem-card.card-division {
    /* Long division problems need extra width */
    min-width: 340px;
    padding: 20px 24px;
}

.problem-card.card-fraction {
    /* Fraction problems */
    min-height: 140px;
}

.problem-card.card-ordering {
    /* Ordering/comparison problems */
    min-height: 160px;
    min-width: 300px;
}

.problem-card.card-table {
    /* Function tables */
    min-width: 320px;
    min-height: 200px;
}

.problem-card.card-tchart {
    /* T-Chart drag-drop problems */
    min-width: 380px;
    min-height: 320px;
    padding: 15px;
}

.problem-card.card-geometry {
    /* Geometry problems with SVG visuals */
    min-width: 300px;
    min-height: 200px;
    padding: 18px;
}

.problem-card.card-geometry svg {
    max-width: 100%;
    height: auto;
}

.problem-card.card-divisibility {
    /* Divisibility sorting problems */
    min-width: 380px;
    min-height: 320px;
    padding: 15px;
}

.problem-card.card-data-stats {
    /* Data & Statistics problems with charts */
    min-width: 340px;
    min-height: 280px;
    padding: 15px;
}

.problem-card.card-data-stats svg {
    max-width: 100%;
    height: auto;
}

.problem-card.card-number-family {
    /* Number families and fact families */
    min-width: 340px;
    min-height: 320px;
    padding: 15px;
}

.problem-card.card-number-family input {
    font-size: 1rem !important;
}

.problem-card .question-number {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-dim);
    background: transparent;
    padding: 0;
    position: absolute;
    bottom: 8px;
    right: 10px;
    z-index: 1;
    opacity: 0.6;
    pointer-events: none;
}

.problem-card .question-line { font-weight: 800; font-size: clamp(1.1rem, 2.5vw, 1.4rem); }

.worksheet-input {
    border-radius: 12px;
    border: 2px solid transparent;
    background: var(--bg-card-light);
    padding: clamp(12px, 2.5vw, 16px) clamp(14px, 2.5vw, 18px);
    font-size: clamp(1.05rem, 2.5vw, 1.35rem);
    font-family: "JetBrains Mono", monospace;
    transition: border 0.2s ease, background 0.2s ease;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    position: relative;
    z-index: 5;
}

/* Medium screens - 2 columns */
@media (max-width: 768px) {
    .problems-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 16px;
    }
}

/* Small mobile screens - consolidated styles */
@media (max-width: 480px) {
    .worksheet-input {
        font-size: 16px !important; /* Prevents zoom on iOS */
        padding: 10px 12px;
    }
    .problem-card {
        padding: 14px;
        min-height: auto;
        overflow-x: auto;
    }
    .problems-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .question-line {
        font-size: 1rem !important;
    }
    /* Allow horizontal scroll for wide content on mobile */
    .problem-card:has(.column-answer-input) {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

.worksheet-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--shadow-glow);
}

/* Column format input styles for carry/borrow boxes and answer boxes */
.column-carry-input, .column-answer-input, .column-work-input {
    outline: none;
    transition: all 0.15s ease;
    box-sizing: border-box;
    position: relative;
    z-index: 10;
    pointer-events: auto !important;
    cursor: text;
    -webkit-user-select: text;
    user-select: text;
}

.column-carry-input:focus, .column-answer-input:focus, .column-work-input:focus {
    box-shadow: 0 0 0 2px var(--accent-cyan);
    transform: scale(1.1);
}

.column-answer-input:focus {
    background: var(--bg-card) !important;
}

/* Ensure all inputs in problem cards are interactive */
.problem-card input[type="text"] {
    pointer-events: auto !important;
    cursor: text;
    -webkit-user-select: text;
    user-select: text;
}

/* Function table input styles */
.func-table-input {
    outline: none;
    transition: all 0.15s ease;
    box-sizing: border-box;
}

.func-table-input:focus {
    box-shadow: 0 0 0 3px var(--accent-cyan);
    transform: scale(1.05);
}

/* Dual-answer input styles (perimeter + area) */
.dual-answer-input {
    outline: none;
    transition: all 0.15s ease;
    box-sizing: border-box;
    font-size: 1.1rem !important;
    padding: 12px 14px !important;
}

.dual-answer-input:focus {
    box-shadow: 0 0 0 3px var(--accent-cyan);
    border-color: var(--accent-cyan) !important;
}

/* Coordinate answer input styles */
.coord-answer-input {
    outline: none;
    transition: all 0.15s ease;
    box-sizing: border-box;
    font-family: "JetBrains Mono", monospace;
    font-size: 1rem !important;
    padding: 10px 12px !important;
}

.coord-answer-input:focus {
    box-shadow: 0 0 0 3px var(--accent-cyan);
    border-color: var(--accent-cyan) !important;
}

@media (max-width: 480px) {
    .func-table-input {
        width: 45px !important;
        height: 28px !important;
        font-size: 14px !important;
    }
}

/* Hint button and popup styles */
.hint-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--accent-orange);
    background: var(--bg-card-light);
    color: var(--accent-orange);
    font-weight: 800;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 5;
}

.hint-btn:hover {
    background: var(--accent-orange);
    color: white;
    transform: scale(1.1);
}

.hint-popup {
    display: none;
    position: absolute;
    top: 45px;
    right: 10px;
    left: 10px;
    background: linear-gradient(135deg, #fff8e1, #fff3cd);
    border: 2px solid var(--accent-orange);
    border-radius: 12px;
    padding: 15px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    z-index: 200;
    font-size: 0.9rem;
    color: #5d4e37;
    pointer-events: none;
}

.dark .hint-popup, .dark-theme .hint-popup {
    background: linear-gradient(135deg, #3d3520, #2d2818);
    color: #e8d5b5;
}

.hint-popup.active {
    display: block;
    animation: hintSlideIn 0.2s ease-out;
    pointer-events: auto;
}

@keyframes hintSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toastSlideUp {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastSlideDown {
    from { opacity: 1; transform: translateX(-50%) translateY(0); }
    to { opacity: 0; transform: translateX(-50%) translateY(20px); }
}

.hint-close {
    position: absolute;
    top: 8px;
    right: 10px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: var(--accent-orange);
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.hint-close:hover {
    background: #e65100;
}

.hint-content {
    padding-right: 25px;
}

.hint-content .hint-title {
    font-weight: 700;
    color: var(--accent-orange);
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.hint-content .hint-visual {
    margin-top: 10px;
    padding: 10px;
    background: rgba(255,255,255,0.5);
    border-radius: 8px;
}

.dark .hint-content .hint-visual, .dark-theme .hint-content .hint-visual {
    background: rgba(0,0,0,0.2);
}

/* Make problem-card position relative for hint popup positioning */
.problem-card {
    position: relative;
}

/* Geometry dual-answer and word problem styles */
.hint-btn-small {
    padding: 6px 14px;
    border: 2px solid var(--accent-orange);
    background: linear-gradient(135deg, #fff8e1, #fff3cd);
    color: var(--accent-orange);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.hint-btn-small:hover {
    background: var(--accent-orange);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

.dual-answer-input {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dual-answer-input:focus {
    border-color: var(--accent-cyan) !important;
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 200, 255, 0.2);
}

.dual-answer-input.correct {
    border-color: var(--accent-green) !important;
    background: rgba(76, 175, 80, 0.1) !important;
}

.dual-answer-input.incorrect {
    border-color: var(--accent-red) !important;
    background: rgba(244, 67, 54, 0.1) !important;
}

.dimension-btn {
    transition: all 0.2s ease;
}

.dimension-btn:hover {
    background: var(--accent-cyan) !important;
    color: white;
}

.dimension-btn.selected {
    background: var(--accent-cyan) !important;
    color: white;
    border-color: var(--accent-cyan) !important;
}

/* Scaffolded word problem card */
.word-problem-card {
    background: var(--bg-card-light);
    border: 2px solid var(--border-light);
    border-radius: 15px;
    padding: 20px;
    margin: 15px auto;
    max-width: 400px;
}

.word-problem-section {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-light);
}

.word-problem-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.word-problem-label {
    font-weight: 700;
    margin-bottom: 8px;
    display: block;
    color: var(--text-main);
}

/* Responsive column format inputs for tablets */
@media (max-width: 768px) {
    .column-carry-input, .column-answer-input, .column-work-input {
        font-size: 16px !important;
    }

    /* Make column inputs larger and more touchable */
    .column-carry-input {
        min-width: 30px !important;
        width: 30px !important;
        height: 24px !important;
        font-size: 14px !important;
    }

    .column-answer-input {
        min-width: 36px !important;
        width: 36px !important;
        height: 36px !important;
        font-size: 16px !important;
    }

    .problems-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* Responsive column format inputs for mobile */
@media (max-width: 480px) {
    .column-carry-input {
        min-width: 26px !important;
        width: 26px !important;
        height: 22px !important;
        font-size: 12px !important;
    }

    .column-answer-input {
        min-width: 32px !important;
        width: 32px !important;
        height: 32px !important;
        font-size: 14px !important;
    }
}

.setting-toggle { display: flex; gap: 10px; }

.toggle-btn {
    padding: 8px 16px;
    border-radius: 10px;
    border: 1px solid var(--text-dim);
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    font-weight: 700;
}

.toggle-btn.active {
    background: var(--accent-cyan);
    color: #fff;
    border-color: var(--accent-cyan);
}

@media (max-width: 640px) {
    .question-text { font-size: 2.2rem; }
    .answer-options { grid-template-columns: 1fr; }
    .nav-bar { flex-direction: column; align-items: stretch; }
}

/* Compact layout for small Chromebook screens (10-12in) */
@media (max-height: 700px) {
    .boss-arena {
        height: 100px;
        margin-bottom: 10px;
    }
    .char-sprite {
        font-size: 2rem;
        bottom: 30px;
    }
    .boss-track {
        bottom: 16px;
        height: 8px;
    }
    .race-track-container {
        padding: 10px 15px;
        margin-bottom: 10px;
    }
    .race-lane {
        height: 32px;
        margin-bottom: 6px;
    }
    .race-car {
        font-size: 1.5rem;
    }
    .question-card {
        padding: 20px;
        border-radius: 20px;
    }
    .question-text {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }
    .visual-hint {
        padding: 12px;
        margin-bottom: 15px;
    }
    .answer-options {
        gap: 10px;
    }
    .answer-btn {
        padding: 12px 16px;
        font-size: 1.1rem;
    }
    .nav-bar {
        padding: 10px 16px;
        margin-bottom: 12px;
    }
    .container {
        padding: 10px;
    }
}

/* Mixed Mode Settings Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow-y: auto;
}

.mixed-settings-container {
    background: var(--bg-card);
    border-radius: 20px;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.mixed-settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    border-radius: 20px 20px 0 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.mixed-settings-header h2 {
    margin: 0;
    font-size: 1.4rem;
}

.modal-close-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.2);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.modal-close-btn:hover {
    background: rgba(255,255,255,0.4);
}

.mixed-settings-body {
    padding: 20px 25px;
}

.mixed-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--bg-card-light);
}

.mixed-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.mixed-section-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.mixed-section-hint {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.mixed-skills-container {
    max-height: 400px;
    overflow-y: auto;
    border: 2px solid var(--bg-card-light);
    border-radius: 12px;
    padding: 10px;
}

/* Domain level (top) */
.mixed-domain {
    margin-bottom: 12px;
    border: 2px solid var(--bg-card-light);
    border-radius: 12px;
    overflow: hidden;
}

.mixed-domain-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    cursor: pointer;
    transition: all 0.2s;
}

.mixed-domain-header:hover {
    filter: brightness(1.1);
}

.mixed-domain-header.expanded {
    border-radius: 0;
}

.mixed-domain-checkbox {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: white;
}

.mixed-domain-name {
    flex: 1;
    font-weight: 700;
    font-size: 1rem;
}

.mixed-domain-count {
    font-size: 0.85rem;
    opacity: 0.9;
    background: rgba(255,255,255,0.2);
    padding: 2px 8px;
    border-radius: 10px;
}

.mixed-domain-expand {
    font-size: 0.9rem;
    transition: transform 0.2s;
}

.mixed-domain-header.expanded .mixed-domain-expand {
    transform: rotate(180deg);
}

.mixed-domain-content {
    display: none;
    padding: 8px;
    background: var(--bg-card);
}

.mixed-domain-content.expanded {
    display: block;
}

/* Category level (middle) */
.mixed-category {
    margin-bottom: 6px;
}

.mixed-category-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--bg-card-light);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.mixed-category-header:hover {
    background: var(--accent-cyan);
    color: white;
}

.mixed-category-header.expanded {
    border-radius: 8px 8px 0 0;
    background: var(--accent-cyan);
    color: white;
}

.mixed-category-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.mixed-category-name {
    flex: 1;
    font-weight: 600;
    font-size: 0.9rem;
}

.mixed-category-expand {
    font-size: 0.8rem;
    transition: transform 0.2s;
}

.mixed-category-header.expanded .mixed-category-expand {
    transform: rotate(180deg);
}

/* Skill level (bottom) */
.mixed-skills-list {
    display: none;
    padding: 6px 10px 6px 35px;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 0 0 8px 8px;
}

.mixed-skills-list.expanded {
    display: block;
}

.mixed-skill-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
}

.mixed-skill-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.mixed-skill-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.mixed-quick-buttons {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.toggle-choice-container {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.toggle-choice-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--bg-card-light);
    border-radius: 10px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-choice-btn:hover {
    border-color: var(--accent-cyan);
}

.toggle-choice-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
    color: white;
    border-color: transparent;
}

.conditional-setting {
    margin-top: 10px;
    padding: 12px;
    background: var(--bg-card-light);
    border-radius: 10px;
}

/* Goal Toggle Styles */
.goal-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    margin-bottom: 10px;
    background: var(--bg-card-light);
    border-radius: 10px;
    gap: 15px;
}

.goal-toggle-row:last-child {
    margin-bottom: 0;
}

.goal-toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    flex: 1;
    font-weight: 600;
    color: var(--text-primary);
}

.goal-toggle-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-cyan);
    cursor: pointer;
}

.goal-input {
    width: 80px;
    padding: 10px 12px;
    border: 2px solid var(--bg-card-light);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    transition: all 0.2s;
}

.goal-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px var(--shadow-glow);
}

.goal-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-card-light);
}

.goal-input:not(:disabled) {
    border-color: var(--accent-cyan);
}

.mixed-settings-footer {
    padding: 20px 25px;
    background: var(--bg-card-light);
    border-radius: 0 0 20px 20px;
}

.mixed-code-section {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 10px;
}

.mixed-code-label {
    font-weight: 600;
    color: var(--text-dim);
}

.mixed-code-display {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-purple);
    background: var(--bg-card-light);
    padding: 8px 14px;
    border-radius: 8px;
    word-break: break-all;
}

.mixed-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

@media (max-width: 600px) {
    .mixed-settings-container {
        max-height: 95vh;
    }
    .mixed-settings-header {
        padding: 15px 18px;
    }
    .mixed-settings-header h2 {
        font-size: 1.1rem;
    }
    .mixed-settings-body {
        padding: 15px 18px;
    }
    .toggle-choice-container {
        flex-direction: column;
    }
    .mixed-code-section {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    .mixed-buttons {
        flex-direction: column;
    }
}

.start-game-btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(6,214,160,0.5), 0 4px 12px rgba(0,0,0,0.15);
}
.start-game-btn:active {
    transform: translateY(0) scale(0.98);
}
.dashboard-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102,126,234,0.4);
}

/* ===== Tooltip System ===== */
.mq-tooltip-trigger {
    position: relative;
    cursor: help;
}
.mq-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-card);
    color: var(--text-bright);
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
    max-width: 260px;
    white-space: normal;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    z-index: 100;
    pointer-events: none;
}
.mq-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--bg-card);
}
.mq-tooltip-trigger:hover .mq-tooltip {
    display: block;
}

/* ===== XP Level Bar ===== */
.mq-xp-bar-wrap {
    width: 100%;
    height: 4px;
    background: var(--bg-card-light);
    border-radius: 2px;
    margin-top: 2px;
    overflow: hidden;
}
.mq-xp-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
    border-radius: 2px;
    transition: width 0.5s ease;
}

/* ===== Smart Review Badge ===== */
.mq-review-badge {
    display: none;
    background: var(--accent-red, #EF476F);
    color: white;
    font-size: 0.65rem;
    font-weight: 800;
    min-width: 16px;
    height: 16px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    margin-left: 4px;
    animation: mqPulse 2s ease-in-out infinite;
}
@keyframes mqPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
.mq-review-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139,92,246,0.4);
}

/* ===== Skill Label Pill ===== */
.mq-skill-pill {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-cyan);
    background: var(--bg-card-light);
    padding: 2px 10px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.mq-skill-pill:empty {
    display: none;
}

/* ===== GRADE LEVEL CIRCLES ===== */
.grade-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 800;
    line-height: 1;
    flex-shrink: 0;
    border: 1.5px solid rgba(0,0,0,0.15);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    letter-spacing: -0.02em;
}
.grade-circle-sm {
    width: 16px;
    height: 16px;
    font-size: 0.6rem;
}
.grade-circle-lg {
    width: 24px;
    height: 24px;
    font-size: 0.8rem;
}

/* Grade legend strip */
.grade-legend {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
    padding: 6px 10px;
    font-size: 0.75rem;
    color: var(--text-dim);
}
.grade-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    cursor: default;
}
.grade-legend-item .grade-circle {
    width: 16px;
    height: 16px;
    font-size: 0.6rem;
}

/* ============================================================================
   PERSISTENT STUDENT BANNER (visible on ALL screens in student mode)
   ============================================================================ */

.student-banner {
    margin: 0 auto;
    padding: 4px 0 0;
}
/* student-only visibility handled by role-toggle.css */

/* ============================================================================
   GAME STATS BANNER (Game View)
   Centered gauge layout: [Left stats] [Timer+Score] [Right stats]
   ============================================================================ */

.game-stats-banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-light) 100%);
    border-radius: 18px;
    padding: 10px 14px 8px;
    margin: 8px auto;
    max-width: 560px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    border: 2px solid var(--bg-card-light);
    position: relative;
    overflow: visible;
}

/* Animated gradient accent line along the top */
.game-stats-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    border-radius: 18px 18px 0 0;
    background: linear-gradient(90deg,
        var(--accent-cyan) 0%,
        var(--accent-green) 25%,
        var(--accent-purple) 50%,
        var(--accent-orange) 75%,
        var(--accent-cyan) 100%);
    background-size: 200% 100%;
    animation: gsb-rainbow-slide 8s linear infinite;
}

@keyframes gsb-rainbow-slide {
    0%   { background-position: 0% 0%; }
    100% { background-position: 200% 0%; }
}

/* --- Center layout: left stats | gauge+score | right stats --- */
.gsb-center-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
}

.gsb-left-stats,
.gsb-right-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.gsb-gauge-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

/* --- Gauge --- */
.gsb-gauge {
    display: flex;
    justify-content: center;
    align-items: center;
}

.gsb-gauge-ring {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    background: #1a1a1a;
    border: 4px solid #333;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 2px 10px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.4s ease, border-color 0.4s ease;
}

.gsb-gauge-inner {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: #0d0d0d;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.gsb-gauge-time {
    font-size: 1.4rem;
    font-weight: 800;
    font-family: 'JetBrains Mono', monospace;
    font-variant-numeric: tabular-nums;
    color: #06D6A0;
    text-shadow: 0 0 10px rgba(6, 214, 160, 0.5);
    line-height: 1;
    letter-spacing: 0.02em;
    transition: color 0.5s ease, text-shadow 0.5s ease;
}

.gsb-gauge-label {
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: #666;
    line-height: 1;
}

/* Timer color states: pulsing yellow at 30s, pulsing red+scale at 60s since last correct */
.gsb-gauge.gsb-warn .gsb-gauge-time {
    color: #FFD93D;
    text-shadow: 0 0 10px rgba(255, 217, 61, 0.5);
}
.gsb-gauge.gsb-warn .gsb-gauge-ring {
    border-color: #b8960a;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 12px rgba(255, 217, 61, 0.25);
    animation: gsb-warn-pulse 1.5s ease-in-out infinite;
}
@keyframes gsb-warn-pulse {
    0%, 100% { box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 0 8px rgba(255,217,61,0.15); }
    50%      { box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 0 18px rgba(255,217,61,0.45); }
}
.gsb-gauge.gsb-danger .gsb-gauge-time {
    color: #EF476F;
    text-shadow: 0 0 10px rgba(239, 71, 111, 0.5);
}
.gsb-gauge.gsb-danger .gsb-gauge-ring {
    border-color: #c0392b;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 14px rgba(239, 71, 111, 0.3);
    animation: gsb-danger-pulse 1.2s ease-in-out infinite;
}
@keyframes gsb-danger-pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 0 14px rgba(239,71,111,0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: inset 0 2px 8px rgba(0,0,0,0.6), 0 0 24px rgba(239,71,111,0.6), 0 0 40px rgba(239,71,111,0.2);
    }
}

/* Score under the gauge */
.gsb-gauge-score {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-top: 4px;
    position: relative;
}

/* Gauge alert state: off-task, idle, or 3+ wrong streak (overrides warn/danger) */
.gsb-gauge.gsb-alert .gsb-gauge-ring {
    border-color: #EF476F;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 20px rgba(239, 71, 111, 0.5), 0 0 40px rgba(239, 71, 111, 0.2);
    animation: gsb-gauge-pulse 1.2s ease-in-out infinite;
}

.gsb-gauge.gsb-alert .gsb-gauge-time {
    color: #EF476F;
    text-shadow: 0 0 10px rgba(239, 71, 111, 0.5);
}

@keyframes gsb-gauge-pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 20px rgba(239, 71, 111, 0.5), 0 0 40px rgba(239, 71, 111, 0.2);
    }
    50% {
        transform: scale(1.03);
        box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 30px rgba(239, 71, 111, 0.7), 0 0 50px rgba(239, 71, 111, 0.3);
    }
}

/* ===== NUDGE POPUP ===== */
.nudge-popup {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 90px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.nudge-popup.nudge-visible {
    opacity: 1;
    pointer-events: auto;
}
.nudge-popup-content {
    background: var(--bg-card, #fff);
    border: 2px solid var(--accent-amber, #f59e0b);
    border-radius: 16px;
    padding: 20px 28px;
    max-width: 320px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0,0,0,0.18);
    animation: nudge-bounce 0.4s ease;
}
.nudge-emoji {
    font-size: 2.2rem;
    display: block;
    margin-bottom: 8px;
}
.nudge-msg {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-bright, #1a1a2e);
    margin: 0 0 14px;
    line-height: 1.4;
}
.nudge-dismiss {
    background: var(--accent-amber, #f59e0b);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 20px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.15s, background 0.15s;
}
.nudge-dismiss:hover {
    background: #d97706;
    transform: scale(1.05);
}
@keyframes nudge-bounce {
    0% { transform: translateY(-20px) scale(0.9); opacity: 0; }
    60% { transform: translateY(4px) scale(1.02); }
    100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* Gauge idle/paused state */
.gsb-gauge.gsb-paused .gsb-gauge-time {
    opacity: 0.45;
}
.gsb-gauge.gsb-paused .gsb-gauge-label {
    opacity: 0.45;
}

/* --- Stat group --- */
.gsb-stat {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    white-space: nowrap;
    position: relative;
}

.gsb-effort-wrap {
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.gsb-stat .gsb-icon,
.gsb-stat .gsb-effort-star,
.gsb-effort-wrap .gsb-effort-star {
    margin-bottom: 0;
}

/* --- General icon --- */
.gsb-icon {
    font-size: 1.15rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* --- Effort star & value --- */
.gsb-effort-star {
    font-size: 1.25rem;
    display: inline-flex;
    align-items: center;
    line-height: 1;
    filter: drop-shadow(0 0 4px rgba(255, 215, 0, 0.6));
    animation: gsb-star-glow 2s ease-in-out infinite;
}

@keyframes gsb-star-glow {
    0%, 100% {
        filter: drop-shadow(0 0 4px rgba(255, 215, 0, 0.6));
        transform: scale(1);
    }
    50% {
        filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.9));
        transform: scale(1.08);
    }
}

.gsb-effort-value {
    font-size: 1.05rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Score (green check) --- */
.gsb-check {
    font-weight: 900;
    color: var(--accent-green);
    font-size: 1rem;
}

/* --- Value (generic stat number) --- */
.gsb-value {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-bright);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

/* --- Label under each stat --- */
.gsb-label {
    display: block;
    width: 100%;
    text-align: center;
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    line-height: 1;
    margin-top: 0;
}

/* --- Streak fire --- */
.gsb-fire {
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Hot fire: streak >= 5 */
.gsb-fire.gsb-fire-hot {
    animation: gsb-fire-blaze 0.6s ease-in-out infinite alternate;
    filter: drop-shadow(0 0 8px rgba(255, 159, 28, 0.8));
    transform: scale(1.35);
}

@keyframes gsb-fire-blaze {
    0% {
        filter: drop-shadow(0 0 6px rgba(255, 159, 28, 0.7));
        transform: scale(1.3) translateY(0);
    }
    100% {
        filter: drop-shadow(0 0 12px rgba(255, 159, 28, 1));
        transform: scale(1.4) translateY(-2px);
    }
}

/* --- Mood face --- */
.gsb-mood {
    padding: 2px 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 2px;
    position: relative;
}

.gsb-mood-face {
    font-size: 1.5rem;
    line-height: 1;
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55),
                filter 0.4s ease;
    filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.15));
}

/* Pop animation class added briefly on mood change */
.gsb-mood-face.gsb-mood-change {
    animation: gsb-mood-pop 0.5s ease-out;
}

@keyframes gsb-mood-pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* --- Popup Toggle (in nav bar) --- */
.gsb-popup-toggle { position: relative; display: inline-block; width: 28px; height: 16px; cursor: pointer; }
.gsb-popup-toggle input { opacity: 0; width: 0; height: 0; }
.gsb-toggle-slider-sm { position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: #ccc; border-radius: 8px; transition: 0.2s; }
.gsb-toggle-slider-sm::before { content: ""; position: absolute; width: 12px; height: 12px; left: 2px; bottom: 2px; background: #fff; border-radius: 50%; transition: 0.2s; }
.gsb-popup-toggle input:checked + .gsb-toggle-slider-sm { background: var(--accent-cyan, #06d6a0); }
.gsb-popup-toggle input:checked + .gsb-toggle-slider-sm::before { transform: translateX(12px); }
.dark .gsb-toggle-slider-sm { background: #555; }
.nav-popup-toggle { vertical-align: middle; display: inline-flex !important; flex-direction: column; align-items: center; gap: 2px; width: auto !important; height: auto !important; }
.popup-toggle-label { font-size: 0.65rem; color: var(--text-bright, #1a1a2e); font-weight: 700; line-height: 1; }
.nav-popup-toggle .gsb-toggle-slider-sm { position: relative; width: 28px; height: 16px; flex-shrink: 0; }

/* --- Nav Bar Tooltip Bubbles --- */
.nav-tip-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
}
.nav-bubble-tip {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 8px;
    padding: 8px 14px;
    background: rgba(20, 20, 35, 0.95);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    z-index: 9999;
    pointer-events: none;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.nav-tip-wrap:hover .nav-bubble-tip { display: block; }
@media (max-width: 600px) { .nav-bubble-tip { font-size: 0.7rem; white-space: normal; max-width: 180px; text-align: center; } }

/* --- Banner Tooltips --- */
.gsb-stat, .gsb-mood, .gsb-review-btn, .gsb-gauge-score, .gsb-gauge { position: relative; }
.gsb-tooltip {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 8px;
    padding: 8px 14px;
    background: rgba(20, 20, 35, 0.95);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    z-index: 9999;
    pointer-events: none;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.gsb-stat:hover .gsb-tooltip,
.gsb-mood:hover .gsb-tooltip,
.gsb-review-btn:hover .gsb-tooltip,
.gsb-gauge-score:hover .gsb-tooltip,
.gsb-gauge:hover > .gsb-tooltip { display: block; }
@media (max-width: 600px) { .gsb-tooltip { font-size: 0.7rem; white-space: normal; max-width: 180px; text-align: center; } }

/* --- Smart Review button --- */
.gsb-review-btn {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 800;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-wrap: wrap;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.35);
}

.gsb-review-btn .gsb-label {
    width: 100%;
}
.gsb-review-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.5);
}

/* Green glow when skills are due (fresh) */
.gsb-review-btn.gsb-review-due {
    animation: gsb-review-green-pulse 2s ease-in-out infinite;
    box-shadow: 0 4px 20px rgba(46, 204, 113, 0.5), 0 0 15px rgba(46, 204, 113, 0.3);
}
@keyframes gsb-review-green-pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(46, 204, 113, 0.5), 0 0 15px rgba(46, 204, 113, 0.3); }
    50% { box-shadow: 0 4px 25px rgba(46, 204, 113, 0.7), 0 0 25px rgba(46, 204, 113, 0.5); }
}

/* Red glow when skills are overdue (urgent) */
.gsb-review-btn.gsb-review-overdue {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    animation: gsb-review-red-pulse 1.5s ease-in-out infinite;
    box-shadow: 0 4px 20px rgba(231, 76, 60, 0.5), 0 0 15px rgba(231, 76, 60, 0.3);
}
@keyframes gsb-review-red-pulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(231, 76, 60, 0.5), 0 0 15px rgba(231, 76, 60, 0.3); }
    50% { box-shadow: 0 4px 25px rgba(231, 76, 60, 0.7), 0 0 25px rgba(231, 76, 60, 0.5); }
}

/* --- Dark mode --- */
.dark .game-stats-banner {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-world) 100%);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

/* --- Mobile responsive --- */
@media (max-width: 480px) {
    .game-stats-banner {
        max-width: 100%;
        border-radius: 12px;
        padding: 6px 6px 4px;
    }
    .gsb-center-layout { gap: 6px; }
    .gsb-gauge-ring { width: 90px; height: 90px; }
    .gsb-gauge-inner { width: 72px; height: 72px; }
    .gsb-gauge-time { font-size: 1.1rem; }
    .gsb-gauge-label { font-size: 0.5rem; }
    .gsb-stat { padding: 4px 6px; }
    .gsb-effort-star { font-size: 0.95rem; }
    .gsb-effort-value { font-size: 0.8rem; }
    .gsb-value { font-size: 0.8rem; }
    .gsb-mood-face { font-size: 1.3rem; }
    .gsb-label { font-size: 0.5rem; }
    .gsb-review-btn { padding: 6px 10px; font-size: 0.8rem; }
}

/* ============================================================================
   HOME STATS BANNER (Home View - Compact Summary Strip)
   Rendered by gamification.js into #homeStatsBanner.
   Uses hsb-item / hsb-sep class names.
   ============================================================================ */

.home-stats-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 0.45rem 1rem;
    background: linear-gradient(90deg,
        var(--bg-card-light) 0%,
        var(--bg-card) 50%,
        var(--bg-card-light) 100%);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.hsb-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 700;
    color: var(--text-bright);
    white-space: nowrap;
    padding: 0 0.5rem;
    font-variant-numeric: tabular-nums;
}

.hsb-sep {
    color: var(--text-dim);
    font-weight: 400;
    padding: 0 0.15rem;
    user-select: none;
}

/* Dark mode */
.dark .home-stats-banner {
    background: linear-gradient(90deg,
        var(--bg-world) 0%,
        var(--bg-card) 50%,
        var(--bg-world) 100%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Mobile responsive */
@media (max-width: 480px) {
    .home-stats-banner {
        gap: 0;
        padding: 0.35rem 0.5rem;
        max-width: 100%;
    }
    .hsb-item {
        font-size: 0.8rem;
        padding: 0 0.35rem;
    }
}

/* ============================================================================
   PRINT: hide all stats banners
   ============================================================================ */

@media print {
    .game-stats-banner,
    .home-stats-banner,
    .mystats-bar {
        display: none !important;
    }
}

/* ============================================================================
   ACCESSIBILITY: respect prefers-reduced-motion
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
    .gsb-effort-star,
    .gsb-fire.gsb-fire-hot,
    .gsb-mood-face.gsb-mood-change,
    .game-stats-banner::before,
    .gsb-gauge.gsb-alert .gsb-gauge-ring,
    .gsb-gauge.gsb-warn .gsb-gauge-ring,
    .gsb-gauge.gsb-danger .gsb-gauge-ring,
    .gsb-review-btn.gsb-review-due,
    .gsb-review-btn.gsb-review-overdue {
        animation: none !important;
    }
    .gsb-effort-star {
        filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.7));
    }
    .gsb-fire.gsb-fire-hot {
        filter: drop-shadow(0 0 8px rgba(255, 159, 28, 0.8));
        transform: scale(1.2);
    }
    .gsb-gauge.gsb-alert .gsb-gauge-ring {
        border-color: #EF476F;
        box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6), 0 0 20px rgba(239, 71, 111, 0.5);
    }
}

/* Share Settings Panel */
.share-settings-panel { background: var(--bg-card, #fff); border-radius: 12px; padding: 16px; margin-top: 12px; margin-bottom: 15px; border: 1px solid var(--bg-card-light, #e0e0e0); }
.share-settings-panel h4 { margin: 0 0 12px; font-size: 0.95rem; color: var(--text-bright, #333); }
.share-settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.share-setting { display: flex; align-items: center; gap: 6px; }
.share-setting label { font-size: 0.8rem; color: var(--text-muted, #888); min-width: 60px; }
.share-setting select { flex: 1; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--bg-card-light, #ddd); background: var(--bg-world, #fff); color: var(--text-bright, #333); font-size: 0.8rem; }
.share-link-row { display: flex; gap: 6px; align-items: center; }
.share-link-field { flex: 1; padding: 6px 10px; border-radius: 6px; border: 1px solid var(--bg-card-light, #ddd); background: var(--bg-world, #f5f5f5); color: var(--text-bright, #333); font-size: 0.75rem; font-family: 'JetBrains Mono', monospace; }
@media (max-width: 600px) { .share-settings-grid { grid-template-columns: 1fr; } }

/* Student Landing Modal */
.landing-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; z-index: 10000; animation: fadeIn 0.2s; }
.landing-modal { background: var(--bg-card, #fff); border-radius: 16px; padding: 28px; max-width: 420px; width: 90%; text-align: center; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.landing-modal h2 { margin: 0 0 8px; font-size: 1.4rem; color: var(--text-bright, #333); }
.landing-modal p { color: var(--text-muted, #888); margin: 0 0 16px; font-size: 0.9rem; }
.landing-skill-code { background: var(--bg-world, #f5f5f5); border-radius: 8px; padding: 8px 12px; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; margin: 12px 0; word-break: break-all; }
.landing-badge { display: inline-block; background: var(--accent-cyan, #06d6a0); color: #fff; padding: 4px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; margin: 3px; }
.landing-choices { margin: 12px 0; text-align: left; }
.landing-choice { display: flex; align-items: center; gap: 8px; margin: 6px 0; }
.landing-choice label { font-size: 0.85rem; min-width: 80px; color: var(--text-bright, #333); }
.landing-choice select { flex: 1; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--bg-card-light, #ddd); font-size: 0.85rem; }
.landing-start-btn { margin-top: 16px; padding: 12px 32px; font-size: 1.1rem; border-radius: 12px; }
.round-score { margin: 16px 0; }
.round-correct { display: block; font-size: 2rem; font-weight: 800; color: var(--accent-cyan, #06d6a0); }
.round-total { display: block; font-size: 0.9rem; color: var(--text-muted, #888); }
.round-buttons { display: flex; gap: 12px; justify-content: center; margin-top: 16px; }

/* Share Link Type Toggle */
.share-link-type { display: flex; gap: 4px; margin-bottom: 12px; }
.share-type-btn { flex: 1; padding: 8px; border: 2px solid var(--bg-card-light); border-radius: 8px; background: var(--bg-card); color: var(--text-dim); font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.share-type-btn.active { border-color: var(--accent-purple); background: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(6,182,212,0.15)); color: var(--accent-purple); }

/* ============================================================================
   MY STATS BAR (under nav, student mode)
   ============================================================================ */
.mystats-bar {
    display: flex;
    justify-content: center;
    padding: 4px 0 2px;
}
.mystats-bar-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 18px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, #8b5cf6, #06b6d4);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(139, 92, 246, 0.35);
    transition: transform 0.15s, box-shadow 0.15s;
}
.mystats-bar-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.5);
}
@media print { .mystats-bar { display: none !important; } }

/* ============================================================================
   MY STATS MODAL
   ============================================================================ */
.mystats-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    animation: fadeIn 0.2s;
    backdrop-filter: blur(4px);
}
.mystats-container {
    background: var(--bg-card, #fff);
    border-radius: 18px;
    padding: 24px;
    max-width: 480px;
    width: 92%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.mystats-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.mystats-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-bright, #333);
}
.mystats-section {
    margin-bottom: 18px;
    background: var(--bg-world, #f8f9fa);
    border-radius: 14px;
    padding: 14px 16px;
}
.mystats-section-title {
    font-weight: 800;
    font-size: 0.9rem;
    color: var(--text-bright, #333);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--bg-card-light, #e8e8e8);
}
.mystats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}
.mystats-stat {
    text-align: center;
    padding: 8px 4px;
    background: var(--bg-card, #fff);
    border-radius: 10px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.mystats-stat-value {
    display: block;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent-purple, #8b5cf6);
    font-variant-numeric: tabular-nums;
}
.mystats-stat-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted, #888);
    margin-top: 2px;
}
.dark .mystats-section { background: var(--bg-world); }
.dark .mystats-stat { background: var(--bg-card); box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2); }
@media (max-width: 400px) { .mystats-grid { grid-template-columns: 1fr 1fr; } }

/* ===== LEARNING STATS VIEW ===== */
.ls-view {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 16px;
}
.ls-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light, #e0e0e0);
    flex-shrink: 0;
}
.ls-header-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-bright);
}
.ls-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 0 32px;
}
.ls-section {
    margin-bottom: 24px;
}
.ls-section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: 10px;
}
.ls-section-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

/* Summary cards */
.ls-summary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.ls-card {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 14px 10px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}
.ls-card-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-cyan, #06d6a0);
    font-variant-numeric: tabular-nums;
}
.ls-card-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted, #888);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Filter select */
.ls-filter-select {
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--border-light, #ccc);
    background: var(--bg-card);
    color: var(--text-bright);
    cursor: pointer;
}

/* Session rows */
.ls-session {
    border: 1px solid var(--border-light, #e0e0e0);
    border-radius: 8px;
    margin-bottom: 6px;
    overflow: hidden;
    background: var(--bg-card);
}
.ls-session-row {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    gap: 10px;
    cursor: default;
}
.ls-expandable .ls-session-row {
    cursor: pointer;
}
.ls-expandable .ls-session-row:hover {
    background: var(--bg-card-hover, rgba(0, 0, 0, 0.03));
}
.ls-expand-icon {
    font-size: 0.65rem;
    color: var(--text-muted);
    width: 12px;
    flex-shrink: 0;
    transition: transform 0.15s;
}
.ls-expanded .ls-expand-icon {
    color: var(--accent-cyan);
}
.ls-session-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}
.ls-session-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-bright);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.ls-session-mode {
    font-size: 0.7rem;
    color: var(--text-muted);
}
.ls-session-stats {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.ls-session-score {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-bright);
    font-variant-numeric: tabular-nums;
}
.ls-session-pct {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    min-width: 32px;
    text-align: right;
}
.ls-session-duration {
    font-size: 0.7rem;
    color: var(--text-muted);
    min-width: 50px;
    text-align: right;
}

/* Session details (expanded) */
.ls-session-details {
    padding: 0 12px 12px;
    border-top: 1px solid var(--border-light, #e0e0e0);
}
.ls-no-breakdown {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 8px 0;
}

/* Breakdown table */
.ls-breakdown-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}
.ls-breakdown-table th {
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.7rem;
    padding: 6px 6px 4px;
    border-bottom: 1px solid var(--border-light, #e0e0e0);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.ls-breakdown-table td {
    padding: 5px 6px;
    color: var(--text-bright);
    vertical-align: middle;
}
.ls-breakdown-table tr:not(:last-child) td {
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, 0.05));
}
.ls-skill-name {
    font-weight: 500;
    max-width: 180px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Mini bar chart */
.ls-mini-bar {
    display: inline-block;
    width: 50px;
    height: 5px;
    background: var(--bg-world, #f0f0f0);
    border-radius: 3px;
    overflow: hidden;
    vertical-align: middle;
}
.ls-mini-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}
.ls-mini-bar-text {
    font-size: 0.72rem;
    font-weight: 600;
    margin-left: 4px;
    font-variant-numeric: tabular-nums;
}

/* Skill summary grid */
.ls-skill-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
}
.ls-skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light, #e0e0e0);
    border-radius: 8px;
    padding: 12px;
}
.ls-skill-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.ls-skill-card-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-bright);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    margin-right: 8px;
}
.ls-skill-card-accuracy {
    font-size: 0.9rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.ls-skill-card-details {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Empty state */
.ls-empty {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-align: center;
    padding: 24px;
    background: var(--bg-card);
    border-radius: 8px;
}

/* Dark mode */
.dark .ls-card { background: var(--bg-card); box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2); }
.dark .ls-session { border-color: var(--border-light, #333); background: var(--bg-card); }
.dark .ls-session-details { border-top-color: var(--border-light, #333); }
.dark .ls-skill-card { border-color: var(--border-light, #333); }
.dark .ls-mini-bar { background: var(--bg-world, #2a2a2a); }
.dark .ls-filter-select { border-color: var(--border-light, #444); }

/* Responsive */
@media (max-width: 600px) {
    .ls-summary-cards { grid-template-columns: repeat(2, 1fr); }
    .ls-skill-grid { grid-template-columns: 1fr; }
    .ls-session-stats { gap: 8px; }
    .ls-session-duration { display: none; }
    .ls-breakdown-table { font-size: 0.72rem; }
    .ls-skill-name { max-width: 120px; }
}
@media (max-width: 400px) {
    .ls-card-value { font-size: 1.1rem; }
    .ls-session-row { padding: 8px; gap: 6px; }
}

/* Print hidden */
@media print { .ls-view { display: none !important; } }