:root {
    --bg: radial-gradient(1200px 800px at 20% 10%, #121826 0%, #0b0f1a 40%, #06080f 100%);
    --panel: rgba(255,255,255,0.04);
    --panel-border: rgba(255,255,255,0.12);
    --text: #e8eefc;
    --muted: #9fb0d9;
    --accent: #6cf0ff;
    --shadow: 0 10px 30px rgba(0,0,0,0.6), inset 0 0 0 1px var(--panel-border);
    --radius: 20px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
    margin: 0;
    color: var(--text);
    font-family: ui-rounded, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.wrap {
    width: min(1100px, 95vw);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: start;
}

.game {
    aspect-ratio: 10 / 20;
    width: min(520px, 70vw);
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.02));
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

canvas#board { width: 100%; height: 100%; display: block; }

.hud {
    display: grid;
    gap: 16px;
    grid-auto-rows: min-content;
    min-width: 260px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

.title {
    font-size: clamp(20px, 2.5vw, 28px);
    letter-spacing: 0.5px;
    margin: 0 0 6px;
}

.subtitle { margin: 0; color: var(--muted); font-size: 14px; }

.stats {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 12px;
    margin-top: 8px;
}
.stats div.value { font-variant-numeric: tabular-nums; font-weight: 700; }

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--panel-border);
    background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
    font-size: 12px;
    color: var(--muted);
}

.next {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px;
    align-items: center;
}
.next canvas {
    width: 80px; height: 80px;
    border-radius: 12px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--panel-border);
}

.controls kbd {
    display: inline-block;
    min-width: 28px;
    text-align: center;
    padding: 6px 8px;
    border-radius: 8px;
    margin: 2px 4px 2px 0;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--panel-border);
    font-weight: 700;
    font-size: 12px;
    color: var(--text);
}

.footer { font-size: 12px; color: var(--muted); }

.overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: linear-gradient(0deg, rgba(6,8,15,0.85), rgba(6,8,15,0.6));
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
    text-align: center;
    padding: 24px;
}
.overlay.active { opacity: 1; pointer-events: auto; }
.overlay h2 { margin: 0 0 12px; font-size: 28px; }
.overlay p { margin: 0 0 16px; color: var(--muted); }
.overlay .actions { display: flex; gap: 12px; }

.btn {
    border: 1px solid var(--panel-border);
    background: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.02));
    color: var(--text);
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 700;
}

.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.brand .dot {
    width: 10px; height: 10px;
    border-radius: 999px;
    background: var(--accent);
    box-shadow: 0 0 18px var(--accent);
}

.grid-legend { font-size: 12px; color: var(--muted); }