:root {
            --accent: #ec4899;
            --brand-bg: #F5E9E7;
            --brand-dark: #18181b;
        }
        body {
            background-color: var(--brand-bg);
            color: var(--brand-dark);
            overflow-x: hidden;
            font-family: ui-sans-serif, system-ui, sans-serif;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }
        
        /* Larger Square Camera Preview */
        .video-container {
            position: relative;
            width: 92vw; /* Use most of the screen width */
            max-width: 450px; 
            margin: 0 auto;
            border-radius: 2rem;
            overflow: hidden;
            background: #000;
            border: 2px solid rgba(24, 24, 27, 0.1);
            aspect-ratio: 1/1; /* Square Mirror */
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.2);
        }

        #input_video {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .mirrored {
            transform: scaleX(-1);
        }

        /* Flash Animation */
        .flash-active {
            animation: flashAnim 0.6s cubic-bezier(0.19, 1, 0.22, 1) forwards;
        }
        @keyframes flashAnim {
            0% { background: white; opacity: 1; }
            100% { background: transparent; opacity: 0; }
        }

        /* Vertical Strip UI Preview - Now Square Photos */
        .strip-preview-vertical {
            background: white;
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            width: 240px; /* Much larger preview */
            box-shadow: 0 40px 80px -15px rgba(0, 0, 0, 0.15);
            margin: 2rem auto;
        }
        
        .strip-preview-vertical img {
            width: 100%;
            aspect-ratio: 1/1; /* Matches the Mirror size */
            object-fit: cover;
            border-radius: 4px;
        }

        .strip-footer-text {
            color: #000;
            font-size: 14px;
            font-weight: 900;
            text-align: center;
            letter-spacing: 3px;
            padding: 10px 0 4px 0;
            text-transform: uppercase;
        }

        .countdown-text {
            text-shadow: 0 0 50px rgba(0,0,0,0.9);
            font-variant-numeric: tabular-nums;
            font-size: 10rem;
        }

        /* Large Action Buttons */
        .btn-primary {
            width: 92vw;
            max-width: 400px;
            padding: 1.5rem;
            font-size: 1.1rem;
            font-weight: 900;
            border-radius: 1.5rem;
            text-transform: uppercase;
            letter-spacing: 0.2em;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Dark Start Button */
        #start-session-btn {
            background-color: var(--brand-dark);
            color: white;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
        }
        #start-session-btn:hover {
            background-color: #27272a;
            transform: translateY(-2px);
        }

        /* Dark Save Button */
        #download-btn {
            background-color: var(--brand-dark);
            color: white;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }
        #download-btn:hover {
            background-color: #3f3f46;
            transform: translateY(-2px);
            box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.15);
        }

        #rotate-camera-btn {
            position: absolute;
            bottom: 1.5rem;
            right: 1.5rem;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: white;
            padding: 1rem;
            border-radius: 50%;
            z-index: 50;
        }

        /* Footer Link Styles */
        .footer-link {
            color: var(--brand-dark);
            transition: color 0.2s ease, opacity 0.2s ease;
            text-decoration: none;
            opacity: 0.9;
        }
        .footer-link:hover {
            opacity: 0.6;
            text-decoration: underline;
        }

        @media (min-width: 1024px) {
            #rotate-camera-btn { display: none; }
        }