/* Bento UI Style - Modern, Clean, Card-based Design */

:root {
    --primary-color: #007AFF;
    --primary-hover: #0056CC;
    --secondary-color: #5856D6;
    --success-color: #34C759;
    --warning-color: #FF9500;
    --error-color: #FF3B30;
    --background: #F2F2F7;
    --surface: #FFFFFF;
    --surface-secondary: #F9F9FB;
    --text-primary: #1C1C1E;
    --text-secondary: #8E8E93;
    --border: #E5E5EA;
    --border-hover: #D1D1D6;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-large: 16px;
    --spacing: 16px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 2);
}

.header-content {
    background: var(--surface);
    padding: calc(var(--spacing) * 2);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow);
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing) * 1.5);
}

/* Cards */
.upload-card,
.preview-card,
.loading-card,
.results-card {
    background: var(--surface);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow);
    padding: calc(var(--spacing) * 2);
    transition: all 0.3s ease;
}

.upload-card:hover,
.preview-card:hover,
.results-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: calc(var(--spacing) * 3);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: var(--surface-secondary);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(0, 122, 255, 0.05);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing);
}

.upload-area h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.upload-area p {
    color: var(--text-secondary);
    margin-bottom: calc(var(--spacing) * 1.5);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.upload-btn {
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

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

.btn-primary:hover,
.upload-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

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

/* Preview Grid */
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing) * 1.5);
}

.preview-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing);
    margin-bottom: calc(var(--spacing) * 1.5);
}

.preview-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface-secondary);
    aspect-ratio: 1;
}

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

.preview-item .remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(255, 59, 48, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.3s ease;
}

.preview-item .remove-btn:hover {
    background: var(--error-color);
    transform: scale(1.1);
}

/* Loading */
.loading-card {
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto calc(var(--spacing) * 1.5);
}

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

/* Results */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing) * 1.5);
    flex-wrap: wrap;
    gap: var(--spacing);
}

.results-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.results-actions {
    display: flex;
    gap: 8px;
}

.events-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing);
    margin-bottom: calc(var(--spacing) * 2);
}

.event-item {
    background: var(--surface-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing);
    transition: all 0.3s ease;
}

.event-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.1);
}

.event-item.selected {
    border-color: var(--primary-color);
    background: rgba(0, 122, 255, 0.05);
}

.event-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing);
    margin-bottom: 8px;
}

.event-checkbox {
    margin-top: 2px;
}

.event-content {
    flex: 1;
}

.event-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.event-time {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 4px;
}

.event-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.event-meta {
    display: flex;
    gap: var(--spacing);
    margin-top: 8px;
    flex-wrap: wrap;
}

.event-tag {
    background: var(--border);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.export-actions {
    display: flex;
    gap: var(--spacing);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    text-align: center;
    padding: calc(var(--spacing) * 2) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .preview-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .results-actions {
        justify-content: center;
    }
    
    .export-actions {
        flex-direction: column;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}