:root {
    --bg-color: #0c0e14;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --accent-color: #00ffcc;
    --accent-glow: rgba(0, 255, 204, 0.3);
    --pipe-color: #00ffcc;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 20% 20%, rgba(0, 255, 204, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(138, 43, 226, 0.06) 0%, transparent 40%);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 80px 20px 20px;
    box-sizing: border-box;
    overflow-x: hidden;
    overflow-y: auto;
}

.home-btn {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.7rem 1.1rem;
    border-radius: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 200;
}

.home-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-5px);
}

.header {
    text-align: center;
    margin-bottom: 1.5rem;
    width: 100%;
}

.title {
    font-size: clamp(2rem, 6vw, 3rem);
    font-weight: 700;
    letter-spacing: 0.2rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.score-container {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.score-box {
    background: var(--card-bg);
    padding: 0.8rem 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    min-width: 110px;
    backdrop-filter: blur(5px);
}

.score-label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

#score, #highScore {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
}

.game-wrapper {
    position: relative;
    padding: 8px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0,255,204,0.08);
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 14px;
    background: linear-gradient(180deg, #0a0a1a 0%, #0d1a1a 100%);
}

/* Overlay */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(12, 14, 20, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 20px;
    z-index: 10;
    opacity: 1;
    transition: opacity 0.3s ease;
    overflow-y: auto;
    padding: 10px 0;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.overlay-content {
    text-align: center;
    padding: 0 15px;
}

.overlay-content h2 {
    font-size: 2.2rem;
    margin-bottom: 0.4rem;
    background: linear-gradient(135deg, #fff, var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.overlay-content p {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-size: 1rem;
}

/* Buttons */
.btn {
    padding: 0.9rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    font-family: 'Outfit', sans-serif;
}

.btn.primary {
    background: linear-gradient(45deg, var(--accent-color), #00b386);
    color: #000;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.share-container {
    display: flex;
    gap: 8px;
    margin-bottom: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.share-container.hidden { display: none; }

.share-btn {
    padding: 0.7rem 1rem;
    font-size: 0.82rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: white;
    font-family: 'Outfit', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    transition: all 0.3s ease;
}

.share-btn:hover { transform: translateY(-2px); filter: brightness(1.1); }
.share-btn.twitter { background: #1DA1F2; }
.share-btn.whatsapp { background: #25D366; }

/* Controls hint */
.controls-info {
    margin-top: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* Footer */
.site-footer {
    width: 100%;
    text-align: center;
    padding: 1.5rem 1rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}
.site-footer a { color: var(--accent-color); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* Mobile */
@media (max-width: 600px) {
    body {
        padding: 70px 10px 20px;
    }

    .home-btn {
        top: 10px;
        left: 10px;
        padding: 0.5rem 0.8rem;
        font-size: 0.8rem;
    }

    .title {
        font-size: 1.8rem;
        margin-bottom: 0.6rem;
    }

    .score-container { gap: 0.8rem; }

    .score-box {
        padding: 0.5rem 1rem;
        min-width: 95px;
    }

    #score, #highScore { font-size: 1.2rem; }

    .overlay-content h2 {
        font-size: 1.5rem;
        margin-bottom: 0.2rem;
    }

    .overlay-content p {
        font-size: 0.85rem;
        margin-bottom: 0.7rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .share-btn {
        padding: 0.6rem 0.9rem;
        font-size: 0.78rem;
    }

    .controls-info { font-size: 0.82rem; }
}