:root {
  --bg: #0b1d4d;
  --panel: #13296a;
  --panel-2: #1b3584;
  --text: #f3f5fb;
  --muted: #aab6dc;
  --red: #d7263d;
  --yellow: #f7c948;
  --tile-text: #111;
  --green: #3ecf8e;
  --error: #ff8a8a;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { max-width: 760px; margin: 0 auto; padding: 16px; }

[hidden] { display: none !important; }

.banner { background: #1d4fd8; padding: 14px 16px; text-align: center; }
.banner h1 { margin: 0; font-size: clamp(18px, 5vw, 28px); letter-spacing: .35em; }
.banner span { background: var(--red); padding: 2px 10px; border-radius: 4px; display: inline-block; margin: 2px 0; }

.card { background: var(--panel); border-radius: var(--radius); padding: 20px; }

label { display: block; color: var(--muted); font-size: 14px; margin-bottom: 4px; }

input {
  width: 100%;
  font: inherit;
  font-size: 18px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 2px solid transparent;
  background: #fff;
  color: #111;
}
input:focus { outline: none; border-color: var(--yellow); }
input.bad { border-color: var(--error); }

button {
  font: inherit;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 8px;
  border: 0;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
}
button:hover { filter: brightness(1.15); }
button:disabled { opacity: .45; cursor: default; filter: none; }
button.primary { background: var(--red); }
button.link { background: none; padding: 4px 6px; color: var(--muted); text-decoration: underline; font-weight: 400; }

.row { display: flex; gap: 8px; }
.row input { flex: 1; min-width: 0; }

.lobby-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 20px; align-items: start; }
.lobby-actions .primary { width: 100%; margin-top: 26px; }
@media (max-width: 560px) { .lobby-actions { grid-template-columns: 1fr; } .lobby-actions .primary { margin-top: 0; } }

.hint { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
.error { color: var(--error); min-height: 1.5em; margin: 12px 0 0; }

.bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.code { font-size: 20px; letter-spacing: .15em; color: var(--yellow); }

.scores { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.scores li { background: var(--panel); border-radius: 8px; padding: 6px 12px; display: flex; gap: 10px; align-items: center; }
.scores li.you { outline: 2px solid var(--yellow); }
.scores .pts { font-weight: 700; color: var(--green); font-variant-numeric: tabular-nums; }
.scores .tag { font-size: 12px; color: var(--muted); }

.round-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.round-head h2 { margin: 0; font-size: 16px; letter-spacing: .2em; color: var(--muted); }
.timer { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; background: #000; color: var(--yellow); padding: 2px 12px; border-radius: 6px; }
.timer.low { color: var(--error); }

.tiles { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.tile {
  min-width: 48px;
  height: 52px;
  padding: 0 8px;
  font-size: 24px;
  font-weight: 800;
  background: var(--yellow);
  color: var(--tile-text);
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button.tile:hover { filter: brightness(1.08); }
.tile.used { opacity: .3; }
.tiles.small .tile { min-width: 30px; height: 34px; font-size: 16px; padding: 0 6px; }

.target { font-size: 44px; font-weight: 800; letter-spacing: .25em; color: var(--yellow); background: #000; display: inline-block; padding: 4px 18px; border-radius: 8px; margin-bottom: 16px; font-variant-numeric: tabular-nums; }

.ops { display: flex; gap: 8px; margin: 10px 0; flex-wrap: wrap; }
.ops button { min-width: 48px; font-size: 20px; }

.steps { margin: 0 0 12px; padding-left: 24px; font-variant-numeric: tabular-nums; }
.steps li { margin: 2px 0; }
.steps .left { color: var(--muted); font-size: 14px; }

.submit-row { display: flex; justify-content: flex-end; margin-top: 16px; }

.waiting { color: var(--muted); }

table { width: 100%; border-collapse: collapse; margin: 8px 0 16px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--panel-2); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 14px; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
.ok { color: var(--green); }
.no { color: var(--error); }
.win { font-weight: 700; color: var(--green); }

details { margin-top: 4px; font-size: 14px; color: var(--muted); }
summary { cursor: pointer; }
.desc { margin: 4px 0 0; padding-left: 18px; }

.best { background: var(--panel-2); border-radius: 8px; padding: 12px 14px; margin-bottom: 16px; }
.best h3 { margin: 0 0 8px; font-size: 15px; color: var(--muted); font-weight: 500; }