/* ==========================================================================
   MOE Tamil Interactive eBook - Home/Library Page Styles
   ========================================================================== */

/* ==========================================================================
   Main Header
   ========================================================================== */

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.98), rgba(22, 33, 62, 0.98));
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 15px rgba(218, 165, 32, 0.3);
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin: 0;
}

.logo-text span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
    background: rgba(218, 165, 32, 0.1);
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: var(--text-dark);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 15px rgba(218, 165, 32, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(218, 165, 32, 0.4);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
    padding: 140px var(--spacing-xl) 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    position: relative;
    overflow: hidden;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(218, 165, 32, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(139, 69, 19, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h2 {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-hero {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--accent-color), #1a8b5a);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 6px 20px rgba(46, 139, 87, 0.4);
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(46, 139, 87, 0.5);
}

.btn-secondary {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    color: var(--secondary-color);
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid var(--secondary-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(218, 165, 32, 0.1);
}

/* Floating Books Animation */
.hero-illustration {
    position: relative;
    height: 400px;
}

.floating-book {
    position: absolute;
    width: 120px;
    height: 160px;
    background: linear-gradient(145deg, var(--bg-card), var(--bg-tertiary));
    border-radius: var(--radius-md);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(218, 165, 32, 0.2);
    animation: float 4s ease-in-out infinite;
}

.floating-book::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 10px;
    right: 10px;
    bottom: 10px;
    background: linear-gradient(135deg, rgba(218, 165, 32, 0.2), transparent);
    border-radius: var(--radius-sm);
}

.book-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.book-2 {
    top: 40%;
    right: 20%;
    width: 140px;
    height: 180px;
    animation-delay: -1s;
}

.book-3 {
    bottom: 10%;
    left: 40%;
    width: 100px;
    height: 140px;
    animation-delay: -2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

/* ==========================================================================
   Library Section
   ========================================================================== */

.library-section {
    padding: var(--spacing-2xl) var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    min-height: 400px;
}

.library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.library-header h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.8rem;
    color: var(--text-primary);
}

.library-header h2 svg {
    color: var(--secondary-color);
}

.library-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 250px;
}

.search-box svg {
    color: var(--text-muted);
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.view-toggle {
    display: flex;
    gap: 2px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 2px;
}

.view-toggle .view-btn {
    padding: var(--spacing-sm);
    background: transparent;
    border: none;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.view-toggle .view-btn:hover {
    color: var(--text-primary);
}

.view-toggle .view-btn.active {
    background: var(--secondary-color);
    color: var(--text-dark);
}

.sort-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
}

.sort-select option {
    background: var(--bg-secondary);
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-icon {
    margin-bottom: var(--spacing-lg);
    color: var(--text-muted);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   Books Grid
   ========================================================================== */

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.books-grid.list-view {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

/* Book Card */
.book-card {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-tertiary));
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid var(--border-color);
    position: relative;
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    border-color: var(--secondary-color);
}

.book-cover {
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    position: relative;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: var(--spacing-md);
}

.book-cover-placeholder svg {
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

.book-cover-placeholder span {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.3;
}

.book-info {
    padding: var(--spacing-md);
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.book-author {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.book-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.book-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.book-options-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-card:hover .book-options-btn {
    opacity: 1;
}

.book-options-btn:hover {
    background: rgba(0, 0, 0, 0.8);
}

/* List View */
.books-grid.list-view .book-card {
    display: flex;
    flex-direction: row;
}

.books-grid.list-view .book-cover {
    width: 80px;
    aspect-ratio: auto;
    height: 110px;
    flex-shrink: 0;
}

.books-grid.list-view .book-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.books-grid.list-view .book-options-btn {
    position: relative;
    top: auto;
    right: auto;
    opacity: 1;
    margin: auto var(--spacing-md) auto 0;
    background: var(--bg-tertiary);
}

/* ==========================================================================
   Modals
   ========================================================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.modal.open {
    display: flex;
}

.modal-content {
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 500px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.upload-modal-content {
    max-width: 550px;
}

.options-modal-content {
    max-width: 350px;
}

.confirm-modal-content {
    max-width: 400px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.3rem;
    color: var(--text-primary);
}

.modal-header h2 svg {
    color: var(--secondary-color);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

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

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--secondary-color);
    background: rgba(218, 165, 32, 0.05);
}

.upload-zone svg {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.upload-zone h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.upload-zone p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.btn-upload {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: var(--text-dark);
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-upload:hover {
    transform: translateY(-2px);
}

.file-limit {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-md);
}

/* File Preview */
.file-preview {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.preview-icon svg {
    color: var(--secondary-color);
}

.preview-info {
    flex: 1;
}

.preview-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
}

.preview-size {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-remove {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-remove:hover {
    color: var(--error-color);
    background: rgba(220, 53, 69, 0.1);
}

/* Book Details Form */
.book-details {
    margin-top: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Upload Progress */
.upload-progress {
    text-align: center;
    padding: var(--spacing-xl);
}

.progress-spinner {
    margin-bottom: var(--spacing-md);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto;
    border: 4px solid var(--border-color);
    border-top-color: var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.progress-bar-container {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    margin-top: var(--spacing-md);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    width: 0%;
    transition: width 0.3s ease;
}

/* Options Modal */
.options-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.option-btn:hover {
    background: rgba(218, 165, 32, 0.1);
    border-color: var(--secondary-color);
}

.option-btn svg {
    color: var(--secondary-color);
}

.option-btn.danger {
    color: var(--error-color);
}

.option-btn.danger svg {
    color: var(--error-color);
}

.option-btn.danger:hover {
    background: rgba(220, 53, 69, 0.1);
    border-color: var(--error-color);
}

.btn-danger {
    background: var(--error-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-danger:hover {
    background: #c82333;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */

.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(218, 165, 32, 0.95);
    color: var(--text-dark);
    border-radius: var(--radius-md);
    font-weight: 500;
    z-index: 2000;
    transition: bottom 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.toast.show {
    bottom: 30px;
}

.toast.error {
    background: rgba(220, 53, 69, 0.95);
    color: white;
}

.toast.info {
    background: rgba(15, 52, 96, 0.95);
    color: white;
    border: 1px solid var(--border-color);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.main-footer {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */

@media screen and (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-illustration {
        display: none;
    }
}

@media screen and (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-text h2 {
        font-size: 2rem;
    }
    
    .library-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .library-controls {
        justify-content: space-between;
    }
    
    .search-box {
        min-width: auto;
        flex: 1;
    }
    
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-md);
    }
}

@media screen and (max-width: 480px) {
    .hero-section {
        padding: 100px var(--spacing-md) 60px;
    }
    
    .hero-text h2 {
        font-size: 1.6rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn-hero, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .library-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .library-controls {
        flex-direction: column;
    }
    
    .search-box {
        width: 100%;
    }
}