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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0a0a0a;
    color: #fff;
    min-height: 100vh;
}

.header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 15px 30px;
    border-bottom: 2px solid #0f3460;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 20px;
    color: #e94560;
}

.nav-links {
    display: flex;
    gap: 15px;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    background: #0f3460;
    font-size: 13px;
    transition: all 0.3s;
}

.nav-links a:hover, .nav-links a.active {
    background: #e94560;
}

.container {
    display: flex;
    height: calc(100vh - 65px);
}

.sidebar {
    width: 300px;
    background: #1a1a2e;
    border-right: 1px solid #0f3460;
    padding: 20px;
    overflow-y: auto;
}

.stream-list {
    margin-top: 15px;
}

.stream-item {
    padding: 12px;
    background: #16213e;
    border-radius: 8px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.stream-item:hover {
    background: #0f3460;
}

.stream-item.active {
    border-color: #e94560;
    background: #0f3460;
}

.stream-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 5px;
}

.stream-info {
    font-size: 12px;
    color: #888;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.toolbar {
    padding: 15px 20px;
    background: #16213e;
    border-bottom: 1px solid #0f3460;
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: #e94560;
    color: #fff;
}

.btn-primary:hover {
    background: #c73e54;
}

.btn-secondary {
    background: #0f3460;
    color: #fff;
}

.btn-secondary:hover {
    background: #1a4a7a;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.video-area {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: #0a0a0a;
    position: relative;
}

.video-wrapper {
    position: relative;
    max-width: 100%;
    max-height: 100%;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.video-wrapper img {
    display: block;
    max-width: 100%;
    max-height: calc(100vh - 200px);
}

.roi-canvas {
    position: absolute;
    top: 0;
    left: 0;
    cursor: crosshair;
}

.roi-canvas.drawing {
    cursor: crosshair;
}

.roi-canvas.editing {
    cursor: move;
}

.instructions {
    padding: 15px 20px;
    background: #1a1a2e;
    border-top: 1px solid #0f3460;
    font-size: 13px;
}

.instructions h3 {
    font-size: 14px;
    margin-bottom: 10px;
    color: #e94560;
}

.instruction-list {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #888;
}

.key {
    padding: 2px 8px;
    background: #0f3460;
    border-radius: 4px;
    font-family: monospace;
    color: #fff;
}

.point-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    background: #e94560;
    border: 2px solid #fff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    cursor: move;
    z-index: 10;
}

.point-marker:hover {
    background: #fff;
    border-color: #e94560;
    transform: translate(-50%, -50%) scale(1.2);
}

.toast {
    position: fixed;
    top: 80px;
    right: 20px;
    padding: 12px 20px;
    background: #28a745;
    color: #fff;
    border-radius: 6px;
    font-size: 13px;
    opacity: 0;
    transform: translateX(100px);
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.error {
    background: #dc3545;
}

.empty-state {
    text-align: center;
    color: #666;
    padding: 60px;
}

.coord-display {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0,0,0,0.7);
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-family: monospace;
    color: #fff;
}