:root {
    --bg-color: #05070a;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.15);
    --accent-color: #00ffcc;
    --accent-glow: rgba(0, 255, 204, 0.3);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --header-h-desktop: 64px;
    --header-h-mobile: 56px;
}

* {
    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, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(138, 43, 226, 0.05) 0%, transparent 40%);
    color: var(--text-primary);
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ==================== HUD HEADER ==================== */
.header {
    height: var(--header-h-desktop);
    background: rgba(12, 14, 20, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 120px 1fr 120px;
    align-items: center;
    padding: 0 20px;
    z-index: 10;
    flex-shrink: 0;
}

/* Left: Hub Button */
.nav-left {
    display: flex;
    justify-content: flex-start;
}
.home-btn {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    font-size: 0.85rem;
    white-space: nowrap;
}
.home-btn:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Center: Score Pills */
.header-center {
    display: flex;
    justify-content: center;
}
.score-container {
    display: flex;
    gap: 12px;
}
.score-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4px 16px;
    min-width: 100px;
}
.score-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}
#score, #highScore {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
}

/* Right: Controls */
.header-right, .header-controls {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}
.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s ease;
}
.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
}
.icon-btn.hidden { display: none !important; }

/* ==================== GAME AREA ==================== */
.game-wrapper {
    flex-grow: 1;
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

#gameCanvas {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    display: block;
}

/* Overlays */
.overlay {
    position: absolute;
    inset: 0;
    background: rgba(12, 14, 20, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s ease;
    padding: 20px;
}
.overlay.hidden {
    opacity: 0;
    pointer-events: none;
}
.overlay-content { text-align: center; width: 100%; max-width: 400px; }
.overlay-content h2 { font-size: 2.2rem; margin-bottom: 0.5rem; color: #fff; }
.overlay-content p { color: var(--text-secondary); margin-bottom: 2rem; }

/* Buttons */
.btn {
    display: block;
    width: 100%;
    max-width: 260px;
    margin: 12px auto;
    padding: 14px;
    font-size: 0.9rem;
    font-weight: 700;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.btn.primary {
    background: var(--accent-color);
    color: #0c0e14;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.btn.primary:hover { transform: translateY(-2px); }

.share-container { display: flex; gap: 10px; justify-content: center; margin-bottom: 1rem; }
.share-container.hidden { display: none; }
.share-btn { flex: 1; padding: 10px; font-size: 0.8rem; color: #fff; border-radius: 10px; border: none; cursor: pointer; }
.share-btn.twitter { background: #1DA1F2; }
.share-btn.whatsapp { background: #25D366; }

/* How to Play */
.htp-open-btn {
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 8px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    margin-top: 10px;
}

/* ==================== MOBILE OVERRIDES ==================== */
@media (max-width: 600px) {
    .header {
        height: var(--header-h-mobile);
        grid-template-columns: 80px 1fr 100px;
        padding: 0 12px;
    }
    
    .home-btn { padding: 6px 10px; font-size: 0.75rem; }
    
    .score-container { gap: 6px; }
    .score-box { min-width: 70px; padding: 2px 8px; }
    #score, #highScore { font-size: 0.95rem; }
    .score-label { font-size: 0.55rem; }
    
    /* Change label text for mobile */
    .h-score-label { font-size: 0; }
    .h-score-label::before { content: 'BEST'; font-size: 0.55rem; }

    .icon-btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .overlay-content h2 { font-size: 1.8rem; }
}

/* Info footer (hide on mobile to save space) */
.controls-info {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    pointer-events: none;
}
@media (max-width: 600px) { .controls-info { display: none; } }

.site-footer { display: none; } /* Standardize by hiding hub footer in game area */