:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #10b981;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'Courier New', Courier, monospace;
}

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

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(239, 68, 68, 0.1) 0px, transparent 50%);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-container {
    width: 100%;
    max-width: 1100px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 15px 25px;
    border-radius: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
    font-size: 1.2rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 15px;
}

.badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}
.badge.recording {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    animation: pulse 2s infinite;
}

.timer {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
}

/* Video Container */
.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--card-border);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

#preview-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.pip-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 200px;
    aspect-ratio: 16/9;
    background: #111;
    border-radius: 12px;
    overflow: hidden;
    border: 2px solid var(--primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.5);
    z-index: 10;
}

#webcam-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1); /* Mirror webcam */
}

.placeholder {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: var(--text-muted);
}
.placeholder i {
    font-size: 4rem;
}

/* Controls */
.controls-panel {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 20px;
    border-radius: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.source-controls, .main-controls {
    display: flex;
    gap: 12px;
}

.btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-source.active {
    background: var(--primary);
    border-color: var(--primary);
}

.btn-action.record:not(:disabled) {
    background: var(--danger);
    border-color: var(--danger);
}
.btn-action.record:not(:disabled):hover {
    background: var(--danger-hover);
}

/* Download Panel */
.download-panel {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 20px;
    border-radius: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.download-actions {
    display: flex;
    gap: 12px;
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}