:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #22c55e;
    --danger: #ef4444;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.5; }
.container { max-width: 1200px; margin: 0 auto; padding: 8px; }
header { text-align: center; padding: 6px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
header h1 {
    font-size: 1.4rem; margin-bottom: 2px;
    background: linear-gradient(135deg, var(--primary), #a855f7);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
header p { color: var(--text-muted); font-size: 0.85rem; }
.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-muted); text-decoration: none; margin-bottom: 8px; font-size: 0.85rem; transition: color 0.2s; }
.back-link:hover { color: var(--primary); }

.tabs { display: flex; gap: 6px; margin-bottom: 8px; flex-wrap: wrap; justify-content: center; }
.tab-btn { padding: 6px 14px; background: var(--bg-card); border: 1px solid var(--border); color: var(--text); border-radius: 6px; cursor: pointer; font-size: 0.85rem; transition: all 0.2s; }
.tab-btn:hover { border-color: var(--primary); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); }
.tool-section { display: none; }
.tool-section.active { display: block; }

.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 10px; padding: 10px; }
.hint { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 10px; }

.drop-zone { border: 2px dashed var(--border); border-radius: 8px; padding: 14px 12px; text-align: center; cursor: pointer; transition: all 0.2s; margin-bottom: 8px; }
.drop-zone:hover, .drop-zone.dragover { border-color: var(--primary); background: rgba(99,102,241,0.05); }
.drop-zone-icon { font-size: 1.4rem; margin-bottom: 4px; }
.drop-zone input { display: none; }
.drop-zone p { font-size: 0.85rem; color: var(--text-muted); }

.file-info { background: var(--bg); padding: 8px 12px; border-radius: 6px; margin: 8px 0; font-size: 0.8rem; color: var(--text-muted); }
.file-info span { color: var(--text); font-weight: 500; }

.controls-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0; align-items: flex-end; }
.ctrl { flex: 1; min-width: 120px; }
.ctrl label { display: block; margin-bottom: 4px; color: var(--text-muted); font-size: 0.8rem; }
.ctrl input[type="number"], .ctrl select { width: 100%; padding: 6px 10px; background: var(--bg); border: 1px solid var(--border); border-radius: 4px; color: var(--text); font-size: 0.85rem; }
.ctrl input[type="number"]:focus, .ctrl select:focus { outline: none; border-color: var(--primary); }
.ctrl input[type="range"] { width: 100%; accent-color: var(--primary); }
.check { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-muted); cursor: pointer; }
.check input { accent-color: var(--primary); }
.radio-group { display: flex; gap: 10px; }
.radio-group label { display: flex; align-items: center; gap: 4px; font-size: 0.8rem; color: var(--text-muted); cursor: pointer; }
.radio-group input { accent-color: var(--primary); }

.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 8px 0; }
@media (max-width: 768px) { .preview-grid { grid-template-columns: 1fr; } }
.preview-box { background: var(--bg); border-radius: 6px; padding: 8px; text-align: center; }
.preview-box h3 { margin-bottom: 4px; font-size: 0.8rem; color: var(--text-muted); }
.preview-box img, .preview-box canvas { max-width: 100%; max-height: 220px; border-radius: 4px; }
.checkerboard { background: repeating-conic-gradient(#333 0% 25%, #444 0% 50%) 50% / 16px 16px; }

.btn { padding: 8px 16px; border: none; border-radius: 6px; font-size: 0.85rem; cursor: pointer; transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #16a34a; }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #475569; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }

/* Crop */
.aspect-ratios { display: flex; gap: 6px; flex-wrap: wrap; }
.aspect-btn { padding: 4px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 4px; color: var(--text); cursor: pointer; font-size: 0.8rem; transition: all 0.2s; }
.aspect-btn:hover, .aspect-btn.active { border-color: var(--primary); background: rgba(99,102,241,0.1); }
.crop-wrapper { position: relative; display: inline-block; }
#cropImage { display: block; max-width: 100%; max-height: 260px; }
.crop-overlay { position: absolute; border: 2px dashed var(--primary); background: rgba(99,102,241,0.15); cursor: move; }
.crop-handle { position: absolute; width: 10px; height: 10px; background: var(--primary); border: 2px solid white; border-radius: 50%; }
.crop-handle.nw { top: -5px; left: -5px; cursor: nw-resize; }
.crop-handle.ne { top: -5px; right: -5px; cursor: ne-resize; }
.crop-handle.sw { bottom: -5px; left: -5px; cursor: sw-resize; }
.crop-handle.se { bottom: -5px; right: -5px; cursor: se-resize; }

/* Camera */
.camera-controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.camera-controls select { flex: 1; min-width: 200px; padding: 8px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; color: var(--text); }
.camera-container { background: #000; border-radius: 6px; overflow: hidden; margin: 6px 0; max-height: 360px; display: flex; justify-content: center; }
#cameraVideo { max-width: 100%; max-height: 360px; }
.camera-actions { display: flex; gap: 8px; justify-content: center; margin: 12px 0; }

/* Loading */
.loading-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.8); flex-direction: column; align-items: center; justify-content: center; z-index: 1000; display: none; }
.loading-overlay.active { display: flex; }
.spinner { width: 40px; height: 40px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { margin-top: 14px; font-size: 0.95rem; }