:root {
    --accent: #34d399;
    --accent-dark: #059669;
    --accent-ink: #022c22;
    --warn: #f59e0b;
    --bad: #ef4444;
    --bg: #0a0f1a;
    --panel: rgba(10, 15, 26, 0.92);
    --panel-2: rgba(255, 255, 255, 0.05);
    --text: #f0fdf4;
    --muted: #94a3b8;
    --line: rgba(255, 255, 255, 0.09);
}
* { box-sizing: border-box; }
html, body {
    margin: 0; height: 100%; overflow: hidden;
    background: var(--bg); color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    -webkit-user-select: none; user-select: none;
    -webkit-tap-highlight-color: transparent;
}
canvas { display: block; width: 100vw; height: 100vh; touch-action: none; }
button { font-family: inherit; cursor: pointer; }
.hidden { display: none !important; }

/* ── HUD ────────────────────────────────────────────────── */
#hud {
    position: fixed; top: 0; left: 0; right: 0;
    display: flex; justify-content: space-between; align-items: flex-start;
    padding: 14px 20px 10px;
    background: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, transparent 100%);
    pointer-events: none; z-index: 10;
}
#hud > * { pointer-events: auto; }
.hud-left, .hud-right { display: flex; gap: 16px; align-items: center; }
.hud-center { text-align: center; flex: 1; }
.stat { display: flex; flex-direction: column; align-items: center; font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.stat b { font-size: 1.5rem; font-weight: 800; color: var(--text); letter-spacing: 0; line-height: 1.2; }
.prompt-label {
    font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.15em;
    color: var(--warn); font-weight: 700; margin-bottom: 2px;
}
.prompt-word {
    font-size: 1.8rem; font-weight: 900; color: var(--accent);
    text-shadow: 0 0 20px rgba(52, 211, 153, 0.5);
    animation: promptPulse 2s ease-in-out infinite;
}
@keyframes promptPulse {
    0%, 100% { text-shadow: 0 0 20px rgba(52,211,153,0.3); }
    50% { text-shadow: 0 0 40px rgba(52,211,153,0.7); }
}
.hud-btn {
    width: 36px; height: 36px; border: none; border-radius: 8px;
    background: var(--panel-2); color: var(--text); font-size: 1.1rem;
    display: flex; align-items: center; justify-content: center;
}

/* ── Streak banner ──────────────────────────────────────── */
#streak-banner {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    font-size: 3.5rem; font-weight: 900; pointer-events: none; z-index: 30;
    text-shadow: 0 0 30px currentColor;
}
#streak-banner.show {
    animation: streakPop 0.8s ease forwards;
}
@keyframes streakPop {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.4); }
    25% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
    100% { opacity: 0; transform: translate(-50%, -60%) scale(1); }
}

/* ── Hit feedback ───────────────────────────────────────── */
#hit-feedback {
    position: fixed; top: 45%; left: 50%; transform: translate(-50%, -50%);
    font-size: 2rem; font-weight: 800; pointer-events: none; z-index: 25;
}
#hit-feedback.show {
    animation: hitPop 0.6s ease forwards;
}
@keyframes hitPop {
    0% { opacity: 0; transform: translate(-50%, -50%) scale(0.5) translateY(0); }
    30% { opacity: 1; transform: translate(-50%, -50%) scale(1.1) translateY(-10px); }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(0.9) translateY(-40px); }
}

/* ── Overlays ───────────────────────────────────────────── */
.overlay {
    position: fixed; inset: 0; z-index: 50;
    display: flex; align-items: center; justify-content: center;
    background: rgba(10, 15, 26, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; } }
.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 36px 32px;
    max-width: 480px;
    width: 90%;
    text-align: center;
}
.kicker {
    font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.15em; color: var(--accent); margin-bottom: 8px;
}
h1 {
    font-size: 3rem; font-weight: 900; line-height: 1;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent), #a7f3d0);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.tagline { color: var(--muted); font-size: 0.9rem; line-height: 1.5; margin-bottom: 24px; }

/* ── Mode select ────────────────────────────────────────── */
.mode-select { margin-bottom: 24px; }
.mode-label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 10px; }
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mode-btn {
    background: var(--panel-2); border: 2px solid var(--line);
    border-radius: 12px; padding: 12px 8px; color: var(--text);
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    transition: all 0.2s;
}
.mode-btn:hover { border-color: rgba(52, 211, 153, 0.4); background: rgba(52, 211, 153, 0.08); }
.mode-btn.active { border-color: var(--accent); background: rgba(52, 211, 153, 0.12); box-shadow: 0 0 20px rgba(52, 211, 153, 0.15); }
.mode-icon { font-size: 1.4rem; }
.mode-name { font-size: 0.85rem; font-weight: 800; }
.mode-desc { font-size: 0.6rem; color: var(--muted); }

/* ── Buttons ────────────────────────────────────────────── */
.primary {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 40px; border: none; border-radius: 50px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--accent-ink); font-size: 1.1rem; font-weight: 800;
    letter-spacing: 0.05em; text-transform: uppercase;
    box-shadow: 0 6px 25px rgba(52, 211, 153, 0.35);
    transition: transform 0.15s, box-shadow 0.15s;
}
.primary:hover { transform: translateY(-2px); box-shadow: 0 10px 35px rgba(52, 211, 153, 0.5); }
.primary:active { transform: translateY(0); }
.primary.wide { width: 100%; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 24px; border: 2px solid var(--line); border-radius: 50px;
    background: transparent; color: var(--text); font-size: 0.85rem; font-weight: 600;
    transition: all 0.2s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.menu-actions { display: flex; flex-direction: column; gap: 10px; align-items: center; margin-top: 16px; }

/* ── Results ────────────────────────────────────────────── */
.res-score-big {
    font-size: 4.5rem; font-weight: 900; line-height: 1;
    background: linear-gradient(135deg, var(--accent), var(--warn));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.res-label { font-size: 0.8rem; color: var(--muted); margin-bottom: 16px; }
.res-stats { display: flex; justify-content: center; gap: 20px; margin-bottom: 16px; }
.res-stat { text-align: center; }
.res-stat b { display: block; font-size: 1.6rem; font-weight: 800; color: var(--accent); }
.res-stat span { font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.res-msg {
    font-size: 1rem; font-weight: 700; padding: 8px 20px;
    border-radius: 10px; display: inline-block; margin-bottom: 8px;
}
.res-msg.gold { background: rgba(245,158,11,0.2); color: #fbbf24; }
.res-msg.silver { background: rgba(148,163,184,0.2); color: #cbd5e1; }
.res-msg.green { background: rgba(52,211,153,0.15); color: var(--accent); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 500px) {
    .panel { padding: 24px 18px; }
    h1 { font-size: 2.4rem; }
    .prompt-word { font-size: 1.3rem; }
    .stat b { font-size: 1.2rem; }
    #hud { padding: 10px 12px 8px; }
    .hud-left, .hud-right { gap: 10px; }
    .mode-grid { grid-template-columns: 1fr 1fr; gap: 6px; }
}