/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette inspired by 1611 KJV Bible */
    --primary-color: #8B4513; /* Saddle Brown */
    --secondary-color: #D2691E; /* Chocolate */
    --accent-color: #DAA520; /* Goldenrod */
    --text-dark: #2F1B14; /* Dark Brown */
    --text-light: #F5F5DC; /* Beige */
    --background-light: #FFF8DC; /* Cornsilk */
    --background-dark: #1A1A1A;
    --parchment: #F4F1E8;
    --gold: #FFD700;
    --deep-red: #8B0000;
    
    /* Typography */
    --font-serif: 'Times New Roman', 'Georgia', serif;
    --font-sans: 'Arial', 'Helvetica', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-serif);
    background-color: var(--background-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.hidden {
    display: none !important;
}

/* Splash Screen - Inspired by 1611 KJV Bible Cover */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, #8B4513 0%, #A0522D 50%, #8B4513 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.5s ease-in;
}

.splash-content {
    text-align: center;
    color: var(--text-light);
    max-width: 600px;
    padding: var(--spacing-xl);
}

.bible-cover {
    background: linear-gradient(145deg, #654321 0%, #8B4513 50%, #654321 100%);
    border: 3px solid var(--gold);
    border-radius: 8px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: 
        0 0 30px rgba(218, 165, 32, 0.3),
        inset 0 0 20px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.bible-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 215, 0, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.cover-ornament {
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--gold) 50%, transparent 100%);
    margin: var(--spacing-md) 0;
    position: relative;
}

.cover-ornament::before,
.cover-ornament::after {
    content: '❦';
    position: absolute;
    top: -8px;
    color: var(--gold);
    font-size: 16px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.cover-ornament::before {
    left: 50%;
    transform: translateX(-50%);
}

.cover-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: bold;
    letter-spacing: 3px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin: var(--spacing-lg) 0;
    color: var(--gold);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), 0 0 10px rgba(255, 215, 0, 0.3); }
    to { text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 215, 0, 0.6); }
}

.cover-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    margin: var(--spacing-md) 0;
    font-style: italic;
}

.cover-translation {
    font-size: clamp(0.8rem, 2vw, 1.1rem);
    margin: var(--spacing-lg) 0;
    line-height: 1.4;
    opacity: 0.9;
}

.cover-year {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: bold;
    color: var(--gold);
    margin-top: var(--spacing-lg);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.loading-progress {
    margin-top: var(--spacing-xl);
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gold), var(--accent-color));
    border-radius: 2px;
    animation: progressFill 5s ease-in-out forwards;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

@keyframes progressFill {
    from { width: 0%; }
    to { width: 100%; }
}

.loading-text {
    font-size: 1rem;
    opacity: 0.8;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Main App Styles */
.main-app {
    min-height: 100vh;
    display: grid;
    grid-template-areas: 
        "header header"
        "sidebar main";
    grid-template-rows: auto 1fr;
    grid-template-columns: 300px 1fr;
    transition: var(--transition-normal);
}

.main-app.sidebar-closed {
    grid-template-columns: 0 1fr;
}

/* Header */
.app-header {
    grid-area: header;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--text-light);
    transition: var(--transition-fast);
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.app-title {
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.header-right {
    display: flex;
    gap: var(--spacing-sm);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background: var(--parchment);
    border-right: 1px solid #ddd;
    overflow-y: auto;
    transition: var(--transition-normal);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
}

.sidebar-content {
    padding: var(--spacing-lg);
}

.sidebar-section {
    margin-bottom: var(--spacing-xl);
}

.sidebar-section h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: var(--spacing-xs);
}

.nav-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-btn {
    background: var(--primary-color);
    color: var(--text-light);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.nav-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.page-info {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-dark);
    padding: var(--spacing-sm);
    background: rgba(139, 69, 19, 0.1);
    border-radius: 4px;
}

.reading-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.reading-controls label {
    font-weight: bold;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.reading-controls input[type="range"] {
    width: 100%;
    margin: var(--spacing-xs) 0;
}

.reading-controls select {
    padding: var(--spacing-sm);
    border: 1px solid #ccc;
    border-radius: 4px;
    background: white;
    font-family: var(--font-serif);
}

/* Main Content */
.main-content {
    grid-area: main;
    padding: var(--spacing-lg);
    overflow: auto;
    position: relative;
}

.pdf-container {
    position: relative;
    max-width: 100%;
    margin: 0 auto;
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

#pdf-canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

.text-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.highlight-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.pdf-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    color: var(--text-dark);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    background: var(--primary-color);
    color: var(--text-light);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.3rem;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 4px;
    transition: var(--transition-fast);
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: var(--spacing-lg);
}

#search-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-serif);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-results {
    max-height: 300px;
    overflow-y: auto;
}

/* Highlight Tools */
.highlight-tools {
    position: absolute;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: var(--spacing-sm);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: var(--spacing-xs);
    z-index: 200;
}

.highlight-btn {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 0.8rem;
    color: white;
    font-weight: bold;
}

.highlight-btn.yellow { background: #ffeb3b; color: #333; }
.highlight-btn.blue { background: #2196f3; }
.highlight-btn.green { background: #4caf50; }
.highlight-btn.pink { background: #e91e63; }
.highlight-btn.remove { background: #f44336; }

.highlight-btn:hover {
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-app {
        grid-template-areas: 
            "header"
            "main";
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: -320px;
        width: 320px;
        height: 100vh;
        z-index: 500;
        transition: var(--transition-normal);
        box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar-content {
        padding: var(--spacing-lg);
        height: 100%;
        overflow-y: auto;
    }
    
    .main-content {
        padding: var(--spacing-sm);
        height: calc(100vh - 64px);
        overflow: hidden;
    }
    
    .pdf-container {
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    #pdf-canvas {
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
    }
    
    .app-title {
        font-size: 1.1rem;
        display: none;
    }
    
    .header-left {
        gap: var(--spacing-sm);
    }
    
    .icon-btn {
        padding: var(--spacing-md);
        min-width: 44px;
        min-height: 44px;
    }
    
    .menu-btn {
        padding: var(--spacing-md);
        min-width: 44px;
        min-height: 44px;
    }
    
    .nav-btn {
        padding: var(--spacing-md);
        font-size: 1rem;
        min-height: 48px;
    }
    
    .reading-controls input[type="range"] {
        height: 44px;
        -webkit-appearance: none;
        appearance: none;
        background: transparent;
        cursor: pointer;
    }
    
    .reading-controls input[type="range"]::-webkit-slider-track {
        background: #ddd;
        height: 8px;
        border-radius: 4px;
    }
    
    .reading-controls input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        height: 24px;
        width: 24px;
        border-radius: 50%;
        background: var(--primary-color);
        cursor: pointer;
        border: 2px solid white;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    }
    
    .reading-controls select {
        padding: var(--spacing-md);
        font-size: 1rem;
        min-height: 48px;
    }
    
    .cover-title {
        font-size: 2rem;
    }
    
    /* Mobile overlay for sidebar */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.5);
        z-index: 499;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 480px) {
    .splash-content {
        padding: var(--spacing-md);
    }
    
    .bible-cover {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }
    
    .cover-title {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .cover-subtitle {
        font-size: 1rem;
    }
    
    .cover-translation {
        font-size: 0.9rem;
    }
    
    .cover-year {
        font-size: 1.4rem;
    }
    
    .main-content {
        padding: 0;
    }
    
    .pdf-container {
        border-radius: 0;
        box-shadow: none;
    }
    
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .sidebar {
        width: 100vw;
        left: -100vw;
    }
    
    .sidebar.open {
        left: 0;
    }
    
    .sidebar-section h3 {
        font-size: 1.2rem;
        margin-bottom: var(--spacing-lg);
    }
    
    .page-info {
        font-size: 1rem;
        padding: var(--spacing-md);
    }
    
    /* Touch-friendly modal */
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }
    
    .modal-header {
        padding: var(--spacing-lg);
    }
    
    .modal-body {
        padding: var(--spacing-lg);
    }
    
    #search-input {
        padding: var(--spacing-lg);
        font-size: 1.1rem;
        min-height: 48px;
    }
    
    .close-btn {
        padding: var(--spacing-md);
        font-size: 1.8rem;
        min-width: 44px;
        min-height: 44px;
    }
}

/* Landscape orientation on mobile */
@media (max-width: 768px) and (orientation: landscape) {
    .main-content {
        height: calc(100vh - 56px);
    }
    
    .app-header {
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .sidebar {
        width: 280px;
        left: -280px;
    }
}

/* Very small screens */
@media (max-width: 320px) {
    .cover-title {
        font-size: 1.5rem;
    }
    
    .cover-subtitle {
        font-size: 0.9rem;
    }
    
    .cover-translation {
        font-size: 0.8rem;
    }
    
    .sidebar-content {
        padding: var(--spacing-md);
    }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    #pdf-canvas {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Theme Variations */
.theme-dark {
    --background-light: var(--background-dark);
    --text-dark: var(--text-light);
    --parchment: #2a2a2a;
}

.theme-sepia {
    --background-light: #f4ecd8;
    --text-dark: #5c4b37;
    --parchment: #ede0d3;
}

/* Brightness Control */
.brightness-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0);
    pointer-events: none;
    z-index: 50;
    transition: var(--transition-normal);
}

/* Print Styles */
@media print {
    .splash-screen,
    .app-header,
    .sidebar,
    .modal,
    .highlight-tools {
        display: none !important;
    }
    
    .main-app {
        grid-template-areas: "main";
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 0;
    }
}