/* Pitch Lock — FunSlop.com
   Karaoke pitch-matching reflex game. Hum (or arrow-key) your way back onto
   the target curve to "retune the model into alignment". Self-contained:
   neon-on-near-black, mobile-first, mic with graceful keyboard fallback. */

:root {
    --bg-dark: #090b10;
    --neon-green: #39ff14;
    --neon-purple: #bd00ff;
    --cyan: #05d9e8;
    --pink: #ff2a6d;
    --gold: #ffd54a;
    --text-primary: #f0f4f8;
    --text-muted: #8b9bb4;
    --glass-border: rgba(255, 255, 255, 0.08);
    --font-body: 'Outfit', system-ui, -apple-system, sans-serif;
    --font-display: 'Space Grotesk', 'Outfit', system-ui, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    min-height: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-primary);
}

/* Ambient neon glow, matching FunSlop's house style */
.glow-bg {
    position: fixed;
    top: -80px;
    left: -80px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, var(--cyan) 0%, transparent 70%);
    opacity: 0.14;
    z-index: -1;
    filter: blur(60px);
    pointer-events: none;
    animation: float 12s infinite alternate;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(140px, 70px); }
}

.game-container {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    user-select: none;
    -webkit-user-select: none;
}

.content {
    text-align: center;
    padding: 2rem 1rem 6rem;
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
}

.title {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 0.85rem;
    background: linear-gradient(45deg, var(--cyan), var(--neon-purple));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* HUD: epoch / score / lock */
.hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 560px;
    margin: 0 auto 0.85rem;
    font-family: var(--font-display);
    font-weight: 700;
}

.hud-item {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.5rem 0.4rem;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hud-level { color: var(--neon-purple); }
.hud-score { color: var(--gold); font-size: 1.25rem; }
.hud-lock  { color: var(--cyan); }

/* When lock is high, glow the lock pill */
.state-playing .hud-lock.locked {
    color: var(--neon-green);
    box-shadow: 0 0 16px rgba(57, 255, 20, 0.45);
    border-color: rgba(57, 255, 20, 0.4);
}

/* The play stage holds the canvas + an overlay for idle/gameover states */
.stage {
    position: relative;
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    aspect-ratio: 16 / 10;
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid rgba(5, 217, 232, 0.25);
    box-shadow:
        0 0 30px rgba(189, 0, 255, 0.22),
        inset 0 0 20px rgba(5, 217, 232, 0.1);
    background: #06070c;
    touch-action: none;
}

#canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

/* Overlay shown over the canvas during idle / gameover */
.overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    padding: 1.5rem 1.25rem;
    background: rgba(6, 7, 12, 0.82);
    backdrop-filter: blur(3px);
    text-align: center;
}

.state-playing .overlay {
    display: none;
}

.overlay-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.25;
    text-shadow: 0 0 18px rgba(5, 217, 232, 0.35);
}

.state-gameover .overlay-title {
    color: var(--pink);
    text-shadow: 0 0 18px rgba(255, 42, 109, 0.5);
}

.state-gameover.new-best .overlay-title {
    color: var(--gold);
    text-shadow: 0 0 18px rgba(255, 213, 74, 0.55);
}

.overlay-body {
    font-size: 0.98rem;
    font-weight: 300;
    color: var(--text-muted);
    line-height: 1.55;
    max-width: 42ch;
}

.overlay-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0.35rem;
}

.overlay-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    min-height: 1.1em;
}

/* Buttons */
.game-btn {
    font-family: var(--font-body);
    padding: 0.85rem 1.6rem;
    font-size: 1.05rem;
    font-weight: 700;
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.15s, filter 0.15s;
    color: var(--bg-dark);
}

.game-btn:active { transform: scale(0.95); }

.game-btn:focus-visible {
    outline: 3px solid var(--cyan);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--neon-green);
    box-shadow: 0 0 18px rgba(57, 255, 20, 0.35);
}
.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 26px rgba(57, 255, 20, 0.5);
}

.btn-secondary {
    background: var(--cyan);
    box-shadow: 0 0 18px rgba(5, 217, 232, 0.35);
}
.btn-secondary:hover {
    filter: brightness(1.1);
    box-shadow: 0 0 26px rgba(5, 217, 232, 0.5);
}

/* Live status line under the stage */
.status {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin: 1rem auto 0.25rem;
    min-height: 1.4em;
    max-width: 540px;
    line-height: 1.35;
}

.best-score {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    min-height: 1.2em;
}

/* Control hints (hidden during play & gameover) */
.controls-inline {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.state-playing .controls-inline,
.state-gameover .controls-inline {
    display: none;
}

.control-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    padding: 0.35rem 0.8rem;
}

.control-pill .key {
    font-weight: 700;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    padding: 0.1rem 0.45rem;
    font-size: 0.8rem;
}

.control-pill.action .key { color: var(--neon-green); }
.control-pill.special .key { color: var(--cyan); }

/* Hide SEO content during active play to keep focus on the stage */
.state-playing .how-to-play,
.state-playing .related-games {
    display: none;
}

/* SEO / how-to content */
.how-to-play {
    text-align: left;
    margin: 2.5rem auto 0;
    max-width: 560px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.75rem;
}

.how-to-play h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.how-to-play h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin: 1.25rem 0 0.5rem;
    color: var(--cyan);
}

.how-to-play p {
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.how-to-play strong { color: var(--text-primary); font-weight: 500; }
.how-to-play em { color: var(--neon-green); font-style: normal; }

.how-to-play ol {
    margin: 0.5rem 0 0.75rem 1.25rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.fun-fact {
    margin-top: 1.25rem;
    padding: 1rem;
    border-left: 3px solid var(--neon-purple);
    background: rgba(189, 0, 255, 0.06);
    border-radius: 0 10px 10px 0;
}

.fun-fact p { margin: 0; }

.related-games {
    margin: 2rem auto 0;
    max-width: 560px;
    text-align: center;
}

.related-games h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.related-games-list {
    display: flex;
    gap: 0.6rem;
    justify-content: center;
    flex-wrap: wrap;
}

.related-game-link {
    text-decoration: none;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    padding: 0.45rem 1rem;
    font-size: 0.9rem;
    transition: border-color 0.2s, color 0.2s;
}

.related-game-link:hover {
    border-color: var(--neon-green);
    color: var(--neon-green);
}

/* Home link */
.home-link {
    position: fixed;
    bottom: 1.25rem;
    bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 1.1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    backdrop-filter: blur(8px);
    transition: border-color 0.2s, color 0.2s;
    z-index: 10;
}

.home-link:hover {
    border-color: var(--neon-purple);
    color: var(--neon-purple);
}

.home-link:active {
    transform: translateX(-50%) scale(0.95);
}

.home-link:focus-visible {
    outline: 3px solid var(--cyan);
    outline-offset: 2px;
}

/* Responsive */
@media (max-width: 600px) {
    .title { font-size: 1.75rem; }
    .hud-item { font-size: 0.85rem; padding: 0.45rem 0.3rem; }
    .hud-score { font-size: 1.05rem; }
    .overlay-title { font-size: 1.1rem; }
    .overlay-body { font-size: 0.9rem; }
    .game-btn { padding: 0.75rem 1.2rem; font-size: 0.95rem; }
    .status { font-size: 0.95rem; }
}