:root {
    --bg-gradient: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    --container-bg: white;
    --header-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --text-color: #333;
    --text-light: #666;
    --text-white: white;
    --upload-bg: #f8f9ff;
    --upload-border: #667eea;
    --settings-bg: #f8f9fa;
    --card-bg: white;
    --card-border: #dee2e6;
    --card-active: #e8f5e9;
    --btn-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --btn-success: #4CAF50;
    --btn-danger: #f44336;
    --btn-disabled: #bdc3c7;
    --status-bg: #fffde7;
    --status-success: #d4edda;
    --status-error: #f8d7da;
    --progress-bg: #e0e0e0;
    --progress-fill: #4CAF50;
    --shadow: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #302b63 100%);
    --container-bg: #1a1a2e;
    --header-bg: linear-gradient(135deg, #24243e 0%, #302b63 100%);
    --text-color: #e0e0e0;
    --text-light: #b0b0b0;
    --text-white: white;
    --upload-bg: #252547;
    --upload-border: #6d6db0;
    --settings-bg: #252547;
    --card-bg: #2d2d5a;
    --card-border: #4a4a8a;
    --card-active: #1e3a1e;
    --btn-bg: linear-gradient(135deg, #4a4a8a 0%, #302b63 100%);
    --btn-success: #2E7D32;
    --btn-danger: #c62828;
    --btn-disabled: #5a5a8a;
    --status-bg: #2d2d2d;
    --status-success: #1e3a1e;
    --status-error: #3d1e1e;
    --progress-bg: #3a3a6e;
    --progress-fill: #4CAF50;
    --shadow: rgba(0,0,0,0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.container {
    width: 100%;
    max-width: 900px;
    background: var(--container-bg);
    border-radius: 20px;
    box-shadow: 0 20px 40px var(--shadow);
    overflow: hidden;
}

/* Шапка */
header {
    background: var(--header-bg);
    color: var(--text-white);
    padding: 25px;
    text-align: center;
    position: relative;
}

.theme-switch {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: white;
    padding: 8px 16px;
    border-radius: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    backdrop-filter: blur(5px);
    transition: all 0.2s;
}

.theme-switch:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}

h1 {
    font-size: clamp(20px, 5vw, 28px);
    margin-bottom: 8px;
}

.subtitle {
    font-size: clamp(12px, 3vw, 15px);
    opacity: 0.95;
}

/* Основной контент */
.main-content {
    padding: clamp(15px, 4vw, 30px);
}

/* Область загрузки */
.upload-area {
    border: 3px dashed var(--upload-border);
    border-radius: 20px;
    padding: clamp(30px, 8vw, 60px) 20px;
    text-align: center;
    background: var(--upload-bg);
    margin-bottom: 25px;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-area:hover {
    transform: scale(1.02);
    background: color-mix(in srgb, var(--upload-bg) 90%, #000 10%);
}

.upload-area.drag-over {
    transform: scale(1.05);
    border-color: var(--btn-success);
    background: color-mix(in srgb, var(--upload-bg) 80%, var(--btn-success) 20%);
}

.upload-icon {
    font-size: clamp(40px, 10vw, 64px);
    margin-bottom: 15px;
    color: var(--upload-border);
}

.upload-area p {
    font-size: clamp(14px, 4vw, 18px);
    margin-bottom: 15px;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--btn-bg);
    color: white;
    border: none;
    padding: clamp(10px, 3vw, 14px) clamp(20px, 5vw, 28px);
    border-radius: 50px;
    font-size: clamp(14px, 4vw, 16px);
    font-weight: 600;
    cursor: pointer;
    margin: 5px;
    text-decoration: none;
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    background: var(--btn-disabled);
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

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

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

/* Панель настроек */
.settings-panel {
    background: var(--settings-bg);
    padding: clamp(15px, 4vw, 25px);
    border-radius: 20px;
    margin-bottom: 25px;
}

.settings-panel h3 {
    font-size: clamp(16px, 4vw, 20px);
    margin-bottom: 15px;
    color: var(--text-color);
}

/* Сетка форматов */
.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.format-card {
    background: var(--card-bg);
    border: 2px solid var(--card-border);
    border-radius: 16px;
    padding: clamp(12px, 3vw, 18px);
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.format-card:hover {
    border-color: var(--upload-border);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow);
}

.format-card.active {
    background: var(--card-active);
    border-color: var(--btn-success);
    transform: scale(1.02);
}

.format-icon {
    font-size: clamp(24px, 6vw, 32px);
}

.format-card div:last-child {
    font-weight: 600;
    font-size: clamp(12px, 3vw, 14px);
}

/* Статус */
.status-box {
    padding: clamp(15px, 4vw, 20px);
    margin: 20px 0;
    border-radius: 16px;
    background: var(--status-bg);
    border-left: 5px solid #ffc107;
    font-size: clamp(14px, 3.5vw, 16px);
}

.status-success {
    background: var(--status-success);
    border-left-color: var(--btn-success);
}

.status-error {
    background: var(--status-error);
    border-left-color: var(--btn-danger);
}

/* Прогресс */
.progress-container {
    margin: 25px 0;
}

.progress-bar {
    width: 100%;
    height: 25px;
    background: var(--progress-bg);
    border-radius: 50px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--progress-fill), #81c784);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 50px;
}

/* Карточки результатов */
.result-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: clamp(15px, 4vw, 25px);
    margin: 20px 0;
    border: 2px solid var(--card-border);
    transition: all 0.2s;
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--shadow);
}

.file-info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.file-icon {
    font-size: clamp(28px, 6vw, 40px);
    min-width: 50px;
    text-align: center;
}

.file-info > div:nth-child(2),
.file-info > div:nth-child(5) {
    flex: 1;
    min-width: 150px;
}

.file-info > div:nth-child(3) {
    font-size: 24px;
    color: var(--text-light);
}

/* Медиа элементы */
audio, video {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    background: var(--card-bg);
    margin: 15px 0;
}

video {
    max-height: 400px;
    object-fit: contain;
    background: #000;
}

img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 12px;
    margin: 15px 0;
    box-shadow: 0 5px 15px var(--shadow);
}

/* Дебаг панель */
.debug-panel {
    background: var(--settings-bg);
    padding: 15px;
    border-radius: 16px;
    margin-top: 25px;
}

.debug-log {
    font-family: 'Courier New', monospace;
    font-size: clamp(11px, 2.5vw, 13px);
    background: #1a1a1a;
    color: #00ff00;
    padding: 15px;
    border-radius: 12px;
    max-height: 150px;
    overflow-y: auto;
    margin-top: 10px;
    line-height: 1.5;
}

/* Футер */
footer {
    text-align: center;
    padding: clamp(15px, 4vw, 20px);
    background: var(--settings-bg);
    border-top: 2px solid var(--card-border);
    font-size: clamp(12px, 3vw, 14px);
    color: var(--text-light);
}

/* Адаптивность для телефонов */
@media (max-width: 600px) {
    .theme-switch {
        position: relative;
        top: 0;
        right: 0;
        margin: 0 auto 15px;
        width: fit-content;
    }
    
    .file-info {
        flex-direction: column;
        text-align: center;
    }
    
    .file-info > div:nth-child(3) {
        transform: rotate(90deg);
        margin: 5px 0;
    }
    
    .file-icon {
        margin-bottom: 5px;
    }
    
    .format-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .btn {
        width: 100%;
        margin: 5px 0;
    }
    
    .btn-success, .btn-danger {
        width: calc(50% - 5px);
    }
}

@media (max-width: 380px) {
    .format-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .btn-success, .btn-danger {
        width: 100%;
    }
}