/*  RESET  */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/*  TOKENS  */
:root {
    --bg: #07070f;
    --surface: #0f0f1c;
    --border: #1e1e35;
    --cyan: #00e5ff;
    --pink: #ff2d78;
    --text: #b0b4c8;
    --dim: #3a3d52;
    --font-hd: 'Orbitron', monospace;
    --font-ui: 'Share Tech Mono', monospace;
}

/*  BASE  */
html, body {
    height: 100%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-ui);
    color: var(--text);
    overflow: hidden;
}

/*  SHELL  */
.shell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

/*  LOGO  */
.logo {
    font-family: var(--font-hd);
    font-size: clamp(16px, 4vw, 30px);
    font-weight: 900;
    letter-spacing: clamp(4px, 2vw, 12px);
    background: linear-gradient(90deg, var(--cyan), var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 10px rgba(0,229,255,0.4));
}

/*  GAME ROW  */
.game-row {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

/*  CANVAS  */
#tetris {
    display: block;
    image-rendering: pixelated;
    border: 2px solid transparent;
    background:
    linear-gradient(var(--surface), var(--surface)) padding-box,
    linear-gradient(135deg, var(--cyan), var(--pink)) border-box;
    box-shadow:
    0 0 20px rgba(0,229,255,0.15),
    0 0 60px rgba(255,45,120,0.08),
    inset 0 0 30px rgba(0,0,0,0.6);
    border-radius: 3px;
    /* JS sets width/height attributes; no CSS sizing needed */
}

/*  SIDEBAR  */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 120px;
}

/*  CARDS  */
.score-card,
.keys-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 10px 12px;
}

.label {
    font-size: 9px;
    letter-spacing: 3px;
    color: var(--dim);
    margin-bottom: 6px;
}

.value {
    font-family: var(--font-hd);
    font-size: clamp(14px, 3vw, 22px);
    font-weight: 700;
    color: var(--cyan);
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(0,229,255,0.5);
}

/*  KEY GUIDE  */
.key-row {
    font-size: 11px;
    color: var(--text);
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}
.key-row:last-child { margin-bottom: 0; }

kbd {
    display: inline-block;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 1px 5px;
    font-family: var(--font-hd);
    font-size: 9px;
    color: var(--cyan);
    letter-spacing: 0;
}

/*  SMALL SCREENS: hide controls hint  */
@media (max-width: 400px) {
    .keys-card { display: none; }
    .sidebar { width: 90px; }
    .label { font-size: 8px; letter-spacing: 2px; }
}