:root {
    --primary: #2196F3;
    --primary-hover: #1565C0;
    --success: #4CAF50;
    --danger: #FF5252;
    --bg-main: #0A0E27;
    --bg-card: #1A1F3A;
    --bg-input: #2A3050;
    --text-primary: #E8EAED;
    --text-secondary: #94A3B8;
    --border: #2A3050;
    --accent: #FF5252;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header .logo {
    max-width: 222px;
    height: auto;
    margin-bottom: -1rem;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.card h2 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    color: var(--primary);
}

.upload-text {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.upload-subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.file-info {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-input);
    border-radius: 8px;
}

.file-info p {
    margin-bottom: 0.5rem;
}

.file-info p:last-child {
    margin-bottom: 0;
}

/* Config Section */
.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.config-group label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.config-group input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.config-group select,
.config-group input[type="number"] {
    padding: 0.75rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
}

.config-group select:focus,
.config-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
}

.radio-group {
    display: flex;
    gap: 1rem;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.5rem;
}

.radio-label input[type="radio"] {
    margin-right: 0.5rem;
    cursor: pointer;
}

.trim-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.trim-info {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 8px;
}

.trim-info p {
    margin-bottom: 0.5rem;
}

/* Preview */
.preview-container {
    background: #000;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}

#preview-canvas {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    background: repeating-conic-gradient(#808080 0% 25%, #404040 0% 50%) 50% / 20px 20px;
}

.preview-controls {
    margin-top: 1rem;
}

#preview-slider {
    width: 100%;
    margin-bottom: 0.5rem;
}

.preview-time {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-primary:disabled {
    background: var(--bg-input);
    cursor: not-allowed;
    opacity: 0.5;
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--bg-input);
    color: var(--text-primary);
    border-color: var(--primary);
}

/* Progress */
.progress-container {
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 24px;
    background: var(--bg-input);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.progress-frames {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Download */
.download-container {
    margin-top: 1.5rem;
    text-align: center;
}

.success-message {
    color: var(--success);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.help-text {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-input);
    border-radius: 8px;
    text-align: left;
}

.help-text ol {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.help-text li {
    margin-bottom: 0.5rem;
}

/* Utility */
.hidden {
    display: none !important;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .card {
        padding: 1.5rem;
    }

    .config-grid {
        grid-template-columns: 1fr;
    }

    .trim-controls {
        grid-template-columns: 1fr;
    }
}