* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --persian-blue: #0067A5;
    --persian-turquoise: #00A5A5;
    --persian-teal: #239FAB;
    --persian-gold: #D4AF37;
    --persian-gold-light: #F0D98F;
    --persian-red: #C8102E;
    --deep-blue: #1e3a5f;
    --bg-cream: #F5F1E8;
    --bg-paper: #FFFEF9;
    --text-dark: #2c2c2c;
    --text-medium: #555;
    --border-gold: #D4AF37;
    --shadow-soft: 0 2px 15px rgba(30, 58, 95, 0.1);
    --shadow-deep: 0 8px 30px rgba(30, 58, 95, 0.2);
}

body {
    font-family: 'Segoe UI', 'Tahoma', 'Arial', sans-serif;
    background: linear-gradient(135deg, #f0e8d8 0%, #e8ddd0 50%, #d8cbb8 100%);
    background-attachment: fixed;
    color: var(--text-dark);
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255,255,255,0.03) 35px, rgba(255,255,255,0.03) 70px);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 50px;
    padding: 40px 30px;
    background: var(--bg-paper);
    border-radius: 0;
    box-shadow: var(--shadow-soft);
    position: relative;
    border: 3px solid var(--border-gold);
    border-top: 6px solid var(--persian-blue);
}

.ornament-top, .ornament-bottom {
    height: 20px;
    background: linear-gradient(90deg, 
        var(--persian-gold) 0%, 
        var(--persian-turquoise) 50%, 
        var(--persian-gold) 100%);
    margin: -40px -30px 20px -30px;
    position: relative;
}

.ornament-bottom {
    margin: 20px -30px -40px -30px;
}

.ornament-top::before,
.ornament-top::after,
.ornament-bottom::before,
.ornament-bottom::after {
    content: '✦';
    position: absolute;
    color: var(--deep-blue);
    font-size: 14px;
    top: 50%;
    transform: translateY(-50%);
}

.ornament-top::before { left: 20px; }
.ornament-top::after { right: 20px; }
.ornament-bottom::before { left: 20px; }
.ornament-bottom::after { right: 20px; }

header h1 {
    font-size: 3.5rem;
    color: var(--persian-blue);
    margin-bottom: 15px;
    font-weight: 700;
    letter-spacing: 3px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    font-family: 'Arial', 'Tahoma', sans-serif;
}

.subtitle {
    font-size: 1.4rem;
    color: var(--persian-turquoise);
    font-weight: 500;
    letter-spacing: 2px;
    margin-top: 10px;
}

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

.chapter-card {
    background: linear-gradient(135deg, var(--bg-paper) 0%, #FFFBF5 100%);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--shadow-soft);
    border: 2px solid var(--persian-gold);
    position: relative;
    overflow: hidden;
}

.chapter-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,167,165,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.chapter-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--persian-turquoise) 0%, 
        var(--persian-blue) 50%, 
        var(--persian-gold) 100%);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.chapter-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-deep);
    border-color: var(--persian-turquoise);
}

.chapter-card:hover::before {
    opacity: 1;
}

.chapter-card:hover::after {
    transform: scaleX(1);
}

.chapter-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--persian-blue), var(--persian-turquoise));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    line-height: 1;
    position: relative;
    z-index: 1;
}

.chapter-label {
    font-size: 0.95rem;
    color: var(--deep-blue);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
}

/* PDF Viewer Styles */
.pdf-viewer-container {
    background: transparent;
    border-radius: 0;
    padding: 0;
    margin-top: 20px;
    animation: fadeIn 0.5s ease;
}

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

.viewer-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px 30px;
    background: var(--bg-paper);
    border: 2px solid var(--border-gold);
    box-shadow: var(--shadow-soft);
    border-radius: 8px;
}

.back-btn {
    background: linear-gradient(135deg, var(--persian-blue), var(--persian-turquoise));
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    box-shadow: 0 4px 10px rgba(0,103,165,0.3);
}

.back-btn:hover {
    transform: translateX(-5px);
    box-shadow: 0 6px 15px rgba(0,103,165,0.4);
}

.back-btn .icon {
    font-size: 1.3rem;
    font-weight: bold;
}

.page-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

#current-chapter-title {
    color: var(--persian-blue);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.page-number {
    color: var(--persian-turquoise);
    font-size: 0.95rem;
    font-weight: 500;
}

/* PDF Page Viewer */
.pdf-page-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    background: transparent;
    padding: 20px 0;
    min-height: 80vh;
}

.pdf-canvas-container {
    flex: 1;
    max-width: 900px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    background: var(--bg-paper);
    border: 3px solid var(--border-gold);
    box-shadow: var(--shadow-deep);
    border-radius: 4px;
    padding: 20px;
    min-height: 600px;
}

#pdf-canvas {
    max-width: 100%;
    height: auto;
    display: block;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--persian-blue);
    font-size: 1.2rem;
    font-weight: 500;
}

.page-nav-btn {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--persian-blue), var(--persian-turquoise));
    color: white;
    border: 3px solid var(--border-gold);
    border-radius: 50%;
    font-size: 2.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,103,165,0.3);
    font-weight: bold;
}

.page-nav-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0,103,165,0.5);
    background: linear-gradient(135deg, var(--persian-turquoise), var(--persian-blue));
}

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

.page-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.nav-btn-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.nav-btn-label {
    font-size: 0.9rem;
    color: var(--deep-blue);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: nowrap;
}

.nav-btn-wrapper:has(.page-nav-btn:disabled) .nav-btn-label {
    opacity: 0.4;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }

    .subtitle {
        font-size: 1.1rem;
    }

    .chapters-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 15px;
    }

    .chapter-card {
        padding: 25px 15px;
    }

    .chapter-number {
        font-size: 2.2rem;
    }

    .chapter-label {
        font-size: 0.8rem;
    }

    .viewer-controls {
        flex-direction: column;
        gap: 15px;
        padding: 15px 20px;
    }

    .back-btn {
        width: 100%;
        justify-content: center;
    }

    .pdf-page-wrapper {
        flex-direction: column;
        gap: 15px;
        padding: 10px;
    }

    .page-nav-btn {
        width: 50px;
        height: 50px;
        font-size: 2rem;
    }

    .nav-btn-label {
        font-size: 0.8rem;
    }

    .pdf-canvas-container {
        padding: 15px;
        min-height: 400px;
    }

    #current-chapter-title {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .chapters-grid {
        grid-template-columns: repeat(auto-fill, minmax(75px, 1fr));
        gap: 12px;
    }

    .chapter-card {
        padding: 20px 12px;
    }

    .chapter-number {
        font-size: 1.8rem;
    }

    .pdf-canvas-container {
        padding: 10px;
        min-height: 350px;
    }
}

/* Footer Styles */
footer {
    margin-top: 40px;
    background: var(--bg-paper);
    border: 2px solid var(--border-gold);
    border-radius: 0;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.footer-ornament-top, .footer-ornament-bottom {
    height: 10px;
    background: linear-gradient(90deg, 
        var(--persian-gold) 0%, 
        var(--persian-turquoise) 50%, 
        var(--persian-gold) 100%);
    position: relative;
}

.footer-ornament-top::before,
.footer-ornament-top::after,
.footer-ornament-bottom::before,
.footer-ornament-bottom::after {
    content: '✦';
    position: absolute;
    color: var(--deep-blue);
    font-size: 10px;
    top: 50%;
    transform: translateY(-50%);
}

.footer-ornament-top::before { left: 15px; }
.footer-ornament-top::after { right: 15px; }
.footer-ornament-bottom::before { left: 15px; }
.footer-ornament-bottom::after { right: 15px; }

.footer-content {
    padding: 25px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-prayer {
    font-size: 0.95rem;
    color: var(--persian-blue);
    font-weight: 500;
    letter-spacing: 0.5px;
    line-height: 1.6;
}

.surah-highlight {
    color: var(--persian-turquoise);
    font-weight: 700;
    font-size: 1.05rem;
    text-shadow: 0 1px 2px rgba(0, 165, 165, 0.2);
    background: linear-gradient(135deg, var(--persian-turquoise), var(--persian-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.footer-credit {
    font-size: 0.85rem;
    color: var(--text-medium);
    font-weight: 400;
}

.developer-name {
    color: var(--persian-turquoise);
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

@media (max-width: 768px) {
    footer {
        margin-top: 30px;
    }

    .footer-content {
        padding: 20px 15px;
        gap: 10px;
    }

    .footer-prayer {
        font-size: 0.9rem;
    }

    .surah-highlight {
        font-size: 1rem;
    }

    .footer-credit {
        font-size: 0.8rem;
    }

    .developer-name {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    footer {
        margin-top: 25px;
    }

    .footer-content {
        padding: 18px 12px;
        gap: 8px;
    }

    .footer-prayer {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    .surah-highlight {
        font-size: 0.95rem;
    }

    .footer-credit {
        font-size: 0.75rem;
    }

    .developer-name {
        font-size: 0.8rem;
    }
}