:root { color-scheme: dark; --bg: #0d1422; --panel: #151f30; --line: #2d3a50; --muted: #a6b3c8; --accent: #5eead4; --rival: #c4b5fd; --gold: #fbbf24; font: 16px/1.5 system-ui, sans-serif; color: #f1f5f9; background: var(--bg); }
* { box-sizing: border-box; }
body { margin: 0; }
.wrap { width: min(1050px, 92%); margin: auto; }
.header { min-height: 90px; display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); }
.logo { font-size: 1.8rem; font-weight: 800; letter-spacing: -1px; }
.logo span, .eyebrow { color: var(--accent); }
#connection { color: var(--muted); font-size: .8rem; }
main { min-height: 75vh; padding: 48px 0; }
h1 { font-size: clamp(2rem, 6vw, 3.5rem); line-height: 1.15; letter-spacing: -1.5px; margin: 12px 0 20px; }
h2 { font-size: 1.3rem; margin: 0 0 20px; }
p { color: var(--muted); }
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; }
.intro { max-width: 650px; margin-bottom: 32px; }
.columns { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.panel { background: var(--panel); border: 1px solid var(--line); padding: 26px; border-radius: 18px; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; color: var(--muted); font-size: .9rem; }
input, select, button { font: inherit; border-radius: 9px; border: 1px solid var(--line); padding: 11px 14px; }
input, select { color: #f1f5f9; background: var(--bg); width: 100%; min-width: 0; }
button { background: var(--accent); color: var(--bg); cursor: pointer; font-weight: 700; }
button:hover:enabled { filter: brightness(1.1); }
button:disabled { opacity: .5; cursor: default; }
button.secondary, button.quiet { background: transparent; color: #e2e8f0; }
button.quiet { border: 0; padding: 8px; }
button.danger { background: transparent; color: #fda4af; border-color: #874450; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.actions, .toolbar, .player, .turn { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.toolbar { justify-content: space-between; margin-bottom: 24px; }
.code { font-family: ui-monospace, monospace; letter-spacing: 2px; color: var(--accent); overflow-wrap: anywhere; }
.player { padding: 16px 0; justify-content: space-between; border-bottom: 1px solid var(--line); }
.player:last-of-type { margin-bottom: 20px; }
.player small { color: var(--muted); }
.badge { font-size: .8rem; color: var(--accent); }
.notice, .turn { background: #22324b; padding: 15px 18px; border-radius: 10px; margin-bottom: 24px; }
.turn { justify-content: space-between; }
.your-turn { color: var(--accent); border: 1px solid #327c74; }
.clock { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--gold); }
.scores { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.score { padding: 16px; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; }
.score.you { border-color: #327c74; }
.score.rival { border-color: #6a5a9c; }
.score strong { display: block; font-size: 1.6rem; color: var(--accent); }
.score.rival strong { color: var(--rival); }
.board { display: grid; grid-template-columns: repeat(var(--size), 1fr); gap: 7px; max-width: 590px; margin: 20px auto; }
.cell { padding: 0; aspect-ratio: 1; border-radius: 9px; background: #202e43; color: #e2e8f0; font-size: clamp(.9rem, 3vw, 1.35rem); }
.cell:disabled { opacity: 1; }
.cell.called { color: var(--accent); background: #173f40; text-decoration: line-through; }
.cell.complete { color: #151b25; background: var(--gold); border-color: var(--gold); }
.cell.last { box-shadow: inset 0 0 0 3px #f8fafc; }
.legend, .history { font-size: .85rem; color: var(--muted); }
.history { overflow-wrap: anywhere; }
.history span { display: inline-block; padding: 4px 9px; border: 1px solid var(--line); border-radius: 6px; margin: 3px; }
.history .automatic { color: var(--gold); }
.result { text-align: center; margin-bottom: 28px; }
.result .actions { justify-content: center; }
.error { position: sticky; bottom: 20px; background: #482332; color: #ffe4e6; padding: 12px 18px; border: 1px solid #a85b70; border-radius: 10px; align-items: center; justify-content: space-between; }
.error:not([hidden]) { display: flex; }
.error button { background: transparent; color: inherit; border: 0; padding: 0 8px; }
dialog { color: #f1f5f9; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 28px; max-width: min(550px, 90%); }
dialog::backdrop { background: #000a; }
footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: .8rem; }
@media (max-width: 650px) { .columns { grid-template-columns: 1fr; } .panel { padding: 20px; } main { padding: 30px 0; } .header { align-items: flex-start; padding: 18px 0; } .header .actions { justify-content: flex-end; gap: 0; } .cell { border-radius: 6px; } .board { gap: 5px; } }