/* ========== PRINT WORKSHEET STYLES ========== */
.print-mode-card {
    background: linear-gradient(135deg, #0891b2, #06b6d4) !important;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.print-mode-card:hover {
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
    transform: translateY(-3px) scale(1.02);
}

.add-skills-card {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa) !important;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
    position: relative;
}

.add-skills-card:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
    transform: translateY(-3px) scale(1.02);
}

/* Progress Dashboard Card */
.progress-card {
    background: linear-gradient(135deg, #10b981, #34d399) !important;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}
.progress-card:hover {
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    transform: translateY(-3px) scale(1.02);
}

/* Progress Dashboard Modal */
.progress-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1100;
    backdrop-filter: blur(4px);
}
.progress-modal.active { display: flex; }
.progress-container {
    background: white;
    border-radius: 20px;
    width: 95%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0,0,0,0.3);
}
.progress-header {
    background: linear-gradient(135deg, #10b981, #34d399);
    color: white;
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.progress-header h2 { margin: 0; font-size: 1.4rem; }
.progress-body {
    padding: 25px;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}
.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}
.progress-stat-card {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    border: 2px solid #bae6fd;
}
.progress-stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: #0369a1;
}
.progress-stat-label {
    font-size: 0.85rem;
    color: #666;
    margin-top: 5px;
}
.progress-skill-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: #f8fafc;
    border-radius: 10px;
    margin-bottom: 10px;
    border-left: 4px solid #10b981;
}
.progress-skill-info { flex: 1; }
.progress-skill-name {
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}
.progress-skill-stats {
    font-size: 0.8rem;
    color: #666;
    margin-top: 3px;
}
.progress-skill-bar-bg {
    width: 100px;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}
.progress-skill-bar {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}
.progress-skill-mastery {
    font-weight: 700;
    font-size: 0.85rem;
    min-width: 45px;
    text-align: right;
}
.progress-empty {
    text-align: center;
    padding: 40px;
    color: #666;
}
.progress-empty-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}
.progress-footer {
    padding: 15px 25px;
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skills-count-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ef4444;
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    min-width: 22px;
    height: 22px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

/* Add Skills Modal */
.add-skills-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
    backdrop-filter: blur(4px);
}

.add-skills-container {
    background: #ffffff;
    border-radius: 20px;
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.add-skills-header {
    padding: 20px 25px;
    background: linear-gradient(135deg, #8b5cf6, #a78bfa);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid rgba(255,255,255,0.2);
}

.add-skills-header h2 {
    margin: 0;
    color: white;
    font-size: 1.4rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.add-skills-body {
    padding: 20px 25px;
    overflow-y: auto;
    flex: 1;
    background: #ffffff;
}

.add-skills-footer {
    padding: 18px 25px;
    background: #f0f4f8;
    border-top: 1px solid #e0e0e0;
    border-radius: 0 0 20px 20px;
}

.print-settings-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
    backdrop-filter: blur(4px);
}

.print-settings-container {
    background: #ffffff;
    border-radius: 20px;
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.print-settings-header {
    padding: 20px 25px;
    background: linear-gradient(135deg, #0891b2, #06b6d4, #22d3ee);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid rgba(255,255,255,0.2);
}

.print-settings-header h2 {
    margin: 0;
    color: white;
    font-size: 1.4rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.print-settings-body {
    padding: 20px 25px;
    overflow-y: auto;
    flex: 1;
    background: #ffffff;
    color: #1a1a2e;
}

/* Override inline styles for light background */
.print-settings-body [style*="color:var(--text-dim)"],
.print-settings-body [style*="color: var(--text-dim)"] {
    color: #666 !important;
}

.print-settings-body [style*="color:var(--text)"],
.print-settings-body [style*="color: var(--text)"] {
    color: #1a1a2e !important;
}

.print-settings-body [style*="background:var(--bg-card)"],
.print-settings-body [style*="background: var(--bg-card)"] {
    background: #f5f5f5 !important;
}

.print-settings-body [style*="border:1px dashed var(--border)"],
.print-settings-body [style*="border: 1px dashed var(--border)"] {
    border-color: #ddd !important;
}

.print-settings-body .dropdown {
    background: #f5f5f5 !important;
    color: #1a1a2e !important;
    border-color: #ddd !important;
}

.print-settings-body input[type="text"],
.print-settings-body input[type="number"],
.print-settings-body select {
    background: #f5f5f5 !important;
    color: #1a1a2e !important;
    border-color: #ddd !important;
}

.print-settings-body .btn-sm {
    background: #0891b2;
    color: white;
}

.print-settings-body .btn-sm:hover {
    background: #06b6d4;
}

.print-section {
    margin-bottom: 22px;
    padding-bottom: 18px;
    border-bottom: 1px solid #e0e0e0;
}

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

.print-section-title {
    font-weight: 700;
    color: #0891b2;
    margin-bottom: 12px;
    font-size: 1rem;
}

.print-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.print-input-label {
    flex: 1;
    font-weight: 600;
    color: #444;
}

.print-input {
    width: 120px;
    padding: 10px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    background: #f5f5f5;
    color: #1a1a2e;
    font-size: 1rem;
    text-align: center;
}

.print-input:focus {
    outline: none;
    border-color: #0891b2;
}

.print-checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: #f5f5f5;
    border-radius: 10px;
    margin-bottom: 10px;
    cursor: pointer;
}

.print-checkbox-row:hover {
    background: #e8f4f8;
}

.print-checkbox-row input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: #0891b2;
    cursor: pointer;
}

.print-checkbox-label {
    font-weight: 600;
    color: #1a1a2e;
    cursor: pointer;
}

/* Weighted Distribution Styles */
.weighted-skill-row {
    transition: all 0.2s ease;
}

.weighted-skill-row:hover {
    background: #f0f4f8 !important;
}

.weighted-category-select,
.weighted-skill-select,
.weighted-percent-input {
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    background: #f5f5f5;
    color: #1a1a2e;
    font-size: 0.9rem;
}

.weighted-category-select:focus,
.weighted-skill-select:focus,
.weighted-percent-input:focus {
    outline: none;
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.print-settings-footer {
    padding: 18px 25px;
    background: #f0f4f8;
    border-top: 1px solid #e0e0e0;
    border-radius: 0 0 20px 20px;
}

.print-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.print-buttons .btn {
    flex: 1;
    min-width: 120px;
}

.btn-print {
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    color: white;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.btn-print:hover {
    filter: brightness(1.1);
    box-shadow: 0 6px 16px rgba(6, 182, 212, 0.4);
    transform: translateY(-1px);
}

/* Print Preview Container */
.print-preview-container {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 1001;
    overflow: auto;
    padding: 20px;
    box-sizing: border-box;
}

.print-preview-toolbar {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, #0891b2, #06b6d4);
    padding: 15px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    z-index: 10;
}

.print-preview-toolbar .btn {
    padding: 10px 20px;
}

.print-preview-content {
    background: white;
    max-width: 8.5in;
    margin: 0 auto;
    padding: 0.75in;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    color: black;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

/* Worksheet Styles (for preview and print) */
.worksheet-header {
    margin-bottom: 30px;
    border-bottom: 2px solid #333;
    padding-bottom: 15px;
}

.worksheet-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
}

.worksheet-info-row {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 10px;
}

.worksheet-field {
    display: flex;
    align-items: baseline;
    gap: 8px;
    flex: 1;
}

.worksheet-field-label {
    font-weight: 600;
    white-space: nowrap;
}

.worksheet-field-line {
    flex: 1;
    border-bottom: 1px solid #333;
    min-width: 150px;
}

.worksheet-problems {
    display: grid;
    gap: 25px;
}

.worksheet-problem {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    page-break-inside: avoid;
    padding: 8px;
    border-radius: 6px;
    overflow: hidden;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    word-break: break-word;
}

.worksheet-problem.full-width {
    grid-column: 1 / -1;
    width: 100%;
}

.worksheet-problem.fast-fact {
    padding: 2px 1px;
}

.worksheet-problem.fast-fact .problem-header,
.worksheet-problem.fast-fact .problem-number {
    display: none;
}

.problem-header {
    width: 100%;
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 6px;
    border-bottom: 1px solid #eee;
    padding-bottom: 4px;
}

.problem-number {
    font-weight: 700;
    color: #333;
}

.problem-content {
    width: 100%;
    text-align: left;
    max-width: 100%;
    overflow: hidden;
    min-width: 0;
    box-sizing: border-box;
}

/* Force visual content to scale within column */
.problem-content svg {
    max-width: 100%;
    height: auto;
    display: block;
}

.problem-content > div {
    max-width: 100%;
    overflow: hidden;
}

/* Scale fraction bars and visual segments for print columns */
.problem-content .frac-bar-visual,
.problem-content .frac-bar-segment,
.problem-content .print-frac-bar {
    max-width: 100%;
}

.problem-content .frac-bar-visual {
    flex-wrap: wrap;
}

/* Constrain flex/grid layouts within problems to wrap */
.problem-content [style*="display:flex"],
.problem-content [style*="display: flex"] {
    max-width: 100%;
    flex-wrap: wrap !important;
}

/* Scale tables within problem columns */
.problem-content table {
    max-width: 100%;
    font-size: inherit;
    table-layout: fixed;
    word-break: break-word;
}

/* Print-visual-wrap: scale down screen visuals for print columns */
.print-visual-wrap {
    max-width: 100%;
    overflow: hidden;
}

.print-visual-wrap svg {
    max-width: 100%;
    height: auto;
}

.print-visual-wrap .frac-bar-segment {
    width: 24px !important;
    height: 24px !important;
}

.print-visual-wrap .frac-bar-visual {
    flex-wrap: wrap;
    max-width: 100%;
}

/* Number line / path visuals - scale to fit column */
.problem-content .number-path,
.problem-content .number-line {
    max-width: 100%;
    overflow-x: auto;
}

/* Column format problems */
.column-problem {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    line-height: 1.4;
    text-align: right;
    display: inline-block;
    min-width: 80px;
}

.column-problem .operand {
    display: block;
}

.column-problem .operator-line {
    display: flex;
    justify-content: space-between;
    border-bottom: 2px solid #333;
    padding-bottom: 5px;
    margin-bottom: 5px;
}

.column-problem .answer-line {
    height: 1.5em;
    border-bottom: 1px dashed #999;
}

/* Long division format */
.long-division {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    display: inline-flex;
    align-items: flex-end;
    gap: 2px;
}

.long-division .divisor {
    padding-right: 5px;
}

.long-division .dividend-box {
    display: flex;
    flex-direction: column;
}

.long-division .quotient-line {
    height: 1.5em;
    border-bottom: 1px dashed #999;
    min-width: 50px;
}

.long-division .dividend {
    border-top: 2px solid #333;
    border-left: 2px solid #333;
    border-top-left-radius: 8px;
    padding: 5px 15px 3px 10px;
}

/* Horizontal problem format */
.horizontal-problem {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.horizontal-problem .answer-blank {
    display: inline-block;
    min-width: 60px;
    border-bottom: 1px solid #333;
}

/* Fraction display for print */
.fraction-display {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 8px;
    font-family: 'Times New Roman', Georgia, serif;
}

.fraction-display .numerator,
.fraction-display .denominator {
    padding: 3px 10px;
    font-weight: 600;
    min-width: 1.2em;
    text-align: center;
}

.fraction-display .fraction-bar {
    width: 100%;
    height: 2px;
    background: #333;
    min-width: 20px;
}

.fraction-display-lg {
    font-size: 1.3rem;
}

.fraction-display-lg .numerator,
.fraction-display-lg .denominator {
    padding: 4px 14px;
}

.fraction-display-lg .fraction-bar {
    height: 3px;
}

/* SVG fraction circle for print - enhanced for visibility */
.print-frac-circle {
    display: inline-block;
    vertical-align: middle;
    margin: 0 8px;
}

.print-frac-circle svg {
    display: block;
}

/* Fraction equation layout for print */
.print-frac-equation {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
    font-family: 'Times New Roman', Georgia, serif;
    flex-wrap: wrap;
}

.print-frac-equation .frac-op {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Fraction visual bar for print - IXL style with black borders */
.print-frac-bar {
    display: inline-flex;
    gap: 2px;
    margin: 10px 0;
    padding: 6px;
    background: #fffde7;
    border-radius: 6px;
    border: 2px solid #d4c85c;
}

.print-frac-bar-segment {
    width: 32px;
    height: 32px;
    border: 2px solid #333;
    border-radius: 4px;
}

.print-frac-bar-segment.filled {
    background: #d4e5f7; /* Light blue like IXL */
    border-color: #333;
}

.print-frac-bar-segment.filled-purple {
    background: #e8d4f0; /* Light purple like IXL */
    border-color: #333;
}

.print-frac-bar-segment.filled-pink {
    background: #f5d4e8; /* Light pink like IXL */
    border-color: #333;
}

.print-frac-bar-segment.empty {
    background: white;
    border-color: #333;
}

/* Strip model container for fraction operations */
.fraction-strip-model {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 15px 0;
    padding: 12px;
    background: #fffde7; /* Light yellow like IXL */
    border: 2px solid #d4c85c;
    border-radius: 8px;
}

.fraction-strip {
    display: flex;
    height: 36px;
    border: 2px solid #333;
    border-radius: 4px;
    overflow: hidden;
}

.fraction-strip-segment {
    flex: 1;
    border-right: 1.5px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: #333;
}

.fraction-strip-segment:last-child {
    border-right: none;
}

.fraction-strip-segment.filled {
    background: #e8d4f0; /* Light purple/lavender like IXL */
}

.fraction-strip-segment.filled-alt {
    background: #d4e5f7; /* Light blue like IXL */
}

.fraction-strip-segment.filled-pink {
    background: #f5d4e8; /* Light pink/magenta like IXL */
}

.fraction-strip-segment.empty {
    background: white;
}

/* Whole unit reference strip */
.fraction-whole-strip {
    height: 32px;
    background: #fffde7; /* Light yellow */
    border: 2px solid #d4c85c;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #333;
}

/* Ensure SVG prints properly */
@media print {
    svg {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    
    /* Force SVG path colors to print */
    svg path {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    
    svg circle {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    
    svg line {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
        color-adjust: exact !important;
    }
    
    /* IXL-style pastel fills for print */
    svg path[fill="#e8d4f0"] { fill: #e8d4f0 !important; } /* Purple */
    svg path[fill="#d4e5f7"] { fill: #d4e5f7 !important; } /* Blue */
    svg path[fill="#f5d4e8"] { fill: #f5d4e8 !important; } /* Pink */
    svg path[fill="#fffde7"] { fill: #fffde7 !important; } /* Yellow */
    
    .fraction-strip-segment.filled {
        background: #e8d4f0 !important; /* Purple */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .fraction-strip-segment.filled-alt {
        background: #d4e5f7 !important; /* Blue */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .fraction-strip-segment.filled-pink {
        background: #f5d4e8 !important; /* Pink */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .fraction-strip-model {
        background: #fffde7 !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .fraction-whole-strip {
        background: #fffde7 !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .print-frac-bar-segment.filled {
        background: #d4e5f7 !important; /* Blue */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .print-frac-bar-segment.filled-purple {
        background: #e8d4f0 !important; /* Purple */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    .print-frac-bar-segment.filled-pink {
        background: #f5d4e8 !important; /* Pink */
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    /* Ensure separator lines print correctly */
    .worksheet-problem div[style*="border-bottom"] {
        border-bottom-color: #000 !important;
        border-bottom-style: solid !important;
        border-bottom-width: 2px !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    /* Ensure all borders print */
    .problem-content * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}

/* Answer key section */
.answer-key-section {
    page-break-before: always;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 3px double #333;
}

.answer-key-title {
    font-size: 1.3rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 25px;
}

.answer-key-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px 20px;
}

.answer-key-item {
    display: flex;
    gap: 8px;
}

.answer-key-num {
    font-weight: 700;
    min-width: 30px;
}

.answer-key-ans {
    color: #333;
}

/* Worked solutions styles */
.worked-solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 30px;
}

.worked-solution-item {
    display: flex;
    gap: 10px;
    padding: 12px;
    background: #f9f9f9;
    border-radius: 8px;
    border-left: 3px solid #4a9;
}

.worked-solution-num {
    font-weight: 700;
    font-size: 1.1rem;
    color: #4a9;
    min-width: 25px;
}

.worked-solution-steps {
    flex: 1;
}

.solution-step {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 4px;
    color: #333;
}

.solution-step strong {
    color: #2d7a2d;
}

/* Worksheet set styles for multiple sets */
.worksheet-set {
    position: relative;
    margin-bottom: 40px;
}

.worksheet-set + .worksheet-set {
    page-break-before: always;
}

@media print {
    .worksheet-set {
        page-break-after: always;
    }
    .worksheet-set:last-child {
        page-break-after: auto;
    }
}

/* Solution Popup Modal */
.solution-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.2s ease;
}

.solution-modal.active {
    display: flex;
}

.solution-modal-content {
    background: white;
    border-radius: 16px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideUp 0.3s ease;
}

.dark .solution-modal-content {
    background: var(--bg-surface);
}

.solution-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    border-bottom: 2px solid #e8f5e8;
    background: linear-gradient(135deg, #f0fff0, #e8f5e8);
    border-radius: 16px 16px 0 0;
}

.dark .solution-modal-header {
    background: linear-gradient(135deg, #1a3a1a, #0d2d0d);
    border-bottom-color: var(--border);
}

.solution-modal-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #2d7a2d;
}

.dark .solution-modal-title {
    color: var(--accent-green);
}

.solution-modal-close {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #666;
    padding: 5px;
    line-height: 1;
}

.solution-modal-close:hover {
    color: #333;
}

.solution-modal-body {
    padding: 24px;
}

.solution-problem {
    font-size: 1.3rem;
    font-weight: 700;
    color: #333;
    padding: 15px 20px;
    background: #f8f9fa;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: center;
    border: 2px dashed #ddd;
}

.dark .solution-problem {
    background: var(--bg-surface);
    border-color: var(--border);
    color: var(--text);
}

.solution-steps-container {
    counter-reset: step-counter;
}

.solution-step-item {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    padding: 12px 15px;
    background: #fafbfc;
    border-radius: 8px;
    border-left: 4px solid #4a9;
    transition: all 0.2s ease;
}

.dark .solution-step-item {
    background: rgba(74, 170, 153, 0.1);
}

.solution-step-item:hover {
    background: #f0fff0;
    transform: translateX(5px);
}

.dark .solution-step-item:hover {
    background: rgba(74, 170, 153, 0.2);
}

.solution-step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 30px;
    height: 30px;
    background: #4a9;
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9rem;
}

.solution-step-text {
    flex: 1;
    font-size: 1.05rem;
    line-height: 1.6;
    color: #333;
}

.dark .solution-step-text {
    color: var(--text);
}

.solution-answer {
    margin-top: 20px;
    padding: 18px;
    background: linear-gradient(135deg, #e8f5e8, #d4edda);
    border-radius: 12px;
    text-align: center;
}

.dark .solution-answer {
    background: linear-gradient(135deg, #1a3a1a, #0d2d0d);
}

.solution-answer-label {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.dark .solution-answer-label {
    color: #aaa;
}

.solution-answer-value {
    font-size: 2rem;
    font-weight: 800;
    color: #2d7a2d;
}

.dark .solution-answer-value {
    color: var(--accent-green);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page footer */
.worksheet-footer {
    margin-top: 40px;
    text-align: center;
    font-size: 0.85rem;
    color: #666;
}

/* Print-specific styles */
@media print {
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    body {
        margin: 0;
        padding: 0;
        background: white !important;
    }

    .container,
    .nav-bar,
    .bg-shapes,
    .print-preview-toolbar,
    .print-settings-modal,
    .print-preview-container {
        display: none !important;
    }

    .print-output {
        display: block !important;
        position: static !important;
        width: 100% !important;
        height: auto !important;
        background: white !important;
        padding: 0 !important;
        margin: 0 !important;
        overflow: visible !important;
    }

    .print-output .print-preview-content {
        box-shadow: none !important;
        max-width: 100% !important;
        padding: 0.5in 0.75in !important;
        margin: 0 !important;
    }

    @page {
        size: 8.5in 11in;
        margin: 0.5in;
    }

    .worksheet-problem {
        page-break-inside: avoid;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .problem-header {
        width: 100%;
        display: flex;
        align-items: baseline;
        gap: 8px;
        margin-bottom: 6px;
        border-bottom: 1px solid #ddd;
        padding-bottom: 4px;
    }
    
    .problem-content {
        width: 100%;
        text-align: left;
    }

    .answer-key-section {
        page-break-before: always;
    }
}