/* CSS Variables */
:root {
    --primary-color: #2196F3;
    --secondary-color: #4CAF50;
    --accent-color: #FFC107;
    --danger-color: #F44336;
    --purple-color: #9C27B0;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 120px;
}

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

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.language-toggle {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.language-toggle:hover {
    background: rgba(255,255,255,0.3);
}

/* Main Content */
.app-main {
    padding: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.app-section {
    display: none;
}

.app-section.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

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

/* Welcome Card */
.welcome-card {
    background: var(--card-background);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.welcome-card h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.welcome-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: white;
}

.btn-primary {
    background: var(--primary-color);
}

.btn-primary:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: var(--text-light);
}

.btn-secondary:hover {
    background: #555;
}

.btn-success {
    background: var(--secondary-color);
}

.btn-success:hover {
    background: #388E3C;
}

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

.btn-danger:hover {
    background: #D32F2F;
}

/* Scrapbooks Grid */
.scrapbooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.scrapbook-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.scrapbook-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.scrapbook-thumbnail {
    width: 100%;
    height: 200px;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 3rem;
}

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

.scrapbook-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.scrapbook-description {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.scrapbook-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
}

.scrapbook-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.action-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.3s ease;
}

.action-btn.edit {
    background: var(--accent-color);
    color: white;
}

.action-btn.delete {
    background: var(--danger-color);
    color: white;
}

/* Create Form */
.create-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.create-header h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.create-form {
    background: var(--card-background);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Template Grid */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.template-option {
    text-align: center;
    cursor: pointer;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.template-option:hover {
    border-color: var(--primary-color);
}

.template-option.active {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.template-preview {
    width: 80px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 4px;
}

.classic-preview {
    background: linear-gradient(45deg, #fff, #f5f5f5);
    border: 1px solid #ddd;
}

.modern-preview {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.vintage-preview {
    background: linear-gradient(45deg, #8D6E63, #BCAAA4);
}

.minimal-preview {
    background: #fafafa;
    border: 1px solid #eee;
}

/* Editor */
.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.editor-header h2 {
    color: var(--primary-color);
    flex: 1;
    text-align: center;
    min-width: 200px;
}

.editor-toolbar {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.tool-btn {
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    background: var(--card-background);
    color: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
}

.tool-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Canvas Container */
.canvas-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-md);
    text-align: center;
    overflow-x: auto;
}

#scrapbookCanvas {
    max-width: 100%;
    height: auto;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: crosshair;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal-content {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h3 {
    color: var(--primary-color);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    padding: var(--spacing-sm);
}

.modal-close:hover {
    color: var(--danger-color);
}

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

.modal-body textarea {
    width: 100%;
    min-height: 120px;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    resize: vertical;
    margin-bottom: var(--spacing-lg);
}

.text-options {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.text-options label {
    font-weight: 500;
}

.text-options input[type="color"] {
    width: 50px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.text-options input[type="range"] {
    width: 100%;
}

/* Gallery */
.gallery-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.gallery-header h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.gallery-filters {
    display: flex;
    gap: var(--spacing-sm);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary-color);
    color: white;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
}

.gallery-item {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-4px);
}

.gallery-thumbnail {
    width: 100%;
    height: 200px;
    background: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    overflow: hidden;
}

.gallery-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-thumbnail img {
    transform: scale(1.05);
}

.gallery-info {
    padding: var(--spacing-md);
    background: var(--card-background);
}

.gallery-info h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.gallery-info p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.4;
}

/* FAQ Section */
.faq-section {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.faq-section h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    font-size: 1.8rem;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-color);
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: var(--background-color);
}

.faq-icon {
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--text-light);
    line-height: 1.6;
    animation: slideDown 0.3s ease;
}

.faq-answer[hidden] {
    display: none;
}

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

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-light);
    transition: color 0.3s ease;
    padding: var(--spacing-sm);
    min-width: 60px;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.nav-item span {
    font-size: 0.8rem;
    font-weight: 500;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-light);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

/* Loading State */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .app-main {
        padding: var(--spacing-sm);
    }
    
    .welcome-card {
        padding: var(--spacing-lg);
    }
    
    .welcome-card h2 {
        font-size: 1.3rem;
    }
    
    .create-form {
        padding: var(--spacing-lg);
    }
    
    .editor-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .editor-header h2 {
        text-align: center;
        margin: var(--spacing-md) 0;
    }
    
    .editor-toolbar {
        justify-content: center;
    }
    
    .tool-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.8rem;
    }
    
    .scrapbooks-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .template-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--spacing-sm);
        padding-bottom: var(--spacing-md);
    }
    
    .gallery-item {
        margin-bottom: var(--spacing-sm);
    }
    
    .gallery-thumbnail {
        height: 180px;
    }
    
    .gallery-info {
        padding: var(--spacing-sm);
    }
    
    .faq-section {
        padding: var(--spacing-lg);
    }
    
    .gallery-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .gallery-filters {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.2rem;
    }
    
    .template-grid {
        grid-template-columns: 1fr;
    }
    
    .editor-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .tool-btn {
        justify-content: center;
    }
    
    .modal-content {
        margin: var(--spacing-sm);
        width: calc(100% - var(--spacing-md));
    }
}

/* Print Styles */
@media print {
    .app-header,
    .bottom-nav,
    .editor-toolbar,
    .faq-section,
    footer {
        display: none;
    }
    
    .app-main {
        padding: 0;
    }
    
    #scrapbookCanvas {
        max-width: 100%;
        height: auto;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 2px 8px rgba(0,0,0,0.3);
        --border-color: #999;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}