html, body {
            height: 100%;
            margin: 0;
            background: #fff;
            overflow: hidden;
            font-family: 'Arial Black', Arial, sans-serif;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }
        body {
            width: 100vw;
            height: 100vh;
            position: relative;
        }
        #canvas {
            width: 100vw;
            height: 100vh;
            display: block;
            cursor: pointer;
            background: #fff;
            position: fixed;
            top: 0; left: 0;
        }
        #gameTitle {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            text-align: center;
            font-family: 'Impact', 'Arial Black', Arial, sans-serif;
            font-size: clamp(2.5rem, 6vw, 5rem);
            letter-spacing: 0.08em;
            font-weight: bold;
            padding: 24px 0 18px 0;
            z-index: 101;
            user-select: none;
            color: #39ff14;
            background: rgba(255,255,255,0.92);
            box-shadow: 0 2px 16px #0002;
            text-shadow:
                0 2px 0 #000,
                0 4px 8px #000,
                0 0 18px #000;
            border-bottom: 2px solid #39ff14;
        }
        #hud {
            position: fixed;
            top: clamp(90px, 12vw, 130px);
            left: 0;
            width: 100vw;
            z-index: 10;
            pointer-events: none;
            display: flex;
            flex-direction: row;
            justify-content: center;
            align-items: center;
            gap: 2vw;
        }
        #score {
            font-size: clamp(2.5rem, 7vw, 5rem);
            font-weight: bold;
            color: #39ff14;
            text-shadow:
                0 0 12px #000,
                0 0 24px #000,
                0 0 48px #000,
                2px 2px 8px #000;
            letter-spacing: 2px;
            margin-right: 0;
            pointer-events: none;
        }
        #hud-right {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 2vw;
        }
        #rounds {
            font-size: clamp(1.5rem, 4vw, 2.5rem);
            color: #222;
            background: rgba(255,255,255,0.7);
            border-radius: 16px;
            padding: 12px 28px;
            font-weight: bold;
            vertical-align: middle;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            pointer-events: none;
        }
        #timer {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            color: #222;
            background: rgba(255,255,255,0.7);
            border-radius: 12px;
            padding: 10px 32px;
            font-weight: bold;
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            pointer-events: none;
        }
        #countdown {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%,-60%);
            font-size: clamp(4rem, 16vw, 10rem);
            font-weight: bold;
            color: #39ff14;
            text-shadow:
                0 0 32px #000,
                0 0 64px #000,
                2px 2px 12px #000;
            z-index: 100;
            pointer-events: none;
            user-select: none;
        }
        #startBtn {
            position: fixed;
            left: 50%;
            transform: translateX(-50%);
            top: 62%;
            font-size: clamp(1.5rem, 4vw, 2.5rem);
            padding: 24px 80px;
            background: #39ff14;
            color: #fff;
            border: none;
            border-radius: 32px;
            font-weight: bold;
            box-shadow: 0 0 24px #39ff14, 0 2px 10px #0004;
            cursor: pointer;
            transition: background 0.2s;
            z-index: 100;
        }
        #startBtn:active {
            background: #2ecc10;
        }
        #shareBtns {
            position: fixed;
            left: 50%;
            top: 62%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 100vw;
            max-width: 600px;
            z-index: 100;
            gap: 0;
        }
        #copyScoreImg {
            margin-bottom: 24px;
            width: 80vw;
            max-width: 400px;
            font-size: clamp(1.2rem, 3vw, 2rem);
            padding: 18px 0;
            background: #39ff14;
            color: #111;
            border: none;
            border-radius: 30px;
            font-weight: bold;
            box-shadow: 0 2px 10px #0004;
            cursor: pointer;
        }
        #shareBtnRow {
            display: flex;
            flex-direction: row;
            gap: 24px;
            width: 100%;
            justify-content: center;
        }
        .share-btn {
            font-size: clamp(1.2rem, 3vw, 2rem);
            padding: 18px 38px;
            border: none;
            border-radius: 30px;
            font-weight: bold;
            cursor: pointer;
            color: #fff;
            box-shadow: 0 2px 10px #0004;
            transition: background 0.2s;
            width: 40vw;
            max-width: 200px;
            min-width: 110px;
        }
        .share-x {
            background: #111;
        }
        .share-farcaster {
            background: #8c52ff;
        }
        /* Responsive adjustments */
        @media (max-width: 900px) {
            #shareBtns { top: 68%; }
            #copyScoreImg { width: 90vw; }
            .share-btn { width: 44vw; }
            #shareBtnRow { gap: 14px; }
        }
        @media (max-width: 700px) {
            #hud {
                flex-direction: column;
                align-items: center;
                gap: 0.4em;
            }
            #score {
                margin-bottom: 0.2em;
            }
            #hud-right {
                flex-direction: row;
                align-items: center;
                gap: 4vw;
            }
        }
        @media (max-width: 600px) {
            #shareBtns { top: 74%; }
            #copyScoreImg { width: 95vw; font-size: 1.1rem; }
            .share-btn { width: 48vw; font-size: 1.1rem; padding: 14px 0; }
            #shareBtnRow { gap: 6vw; }
            #gameTitle { font-size: 2.2rem; padding: 12px 0 8px 0; }
        }
        @media (max-width: 400px) {
            #gameTitle { font-size: 1.3rem; }
            #score { font-size: 1.3rem; }
            #rounds { font-size: 1.1rem; }
            #countdown { font-size: 2.2rem; }
        }
        .text-gradient {
            position: fixed;
            bottom: 10px;
            width: 100%;
            text-align: center;
            color: #222;
            font-size: 14px;
            z-index: 1;
            pointer-events: none;
        }