:root {
  --bg: #f6f6f4;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --ok: #16a34a;
  --warn: #b45309;
  --danger: #dc2626;
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #171a21;
    --ink: #f2f3f5;
    --muted: #9aa4b2;
    --line: #2a2f3a;
    --accent: #5b9dff;
    --ok: #4ade80;
    --warn: #fbbf24;
    --danger: #f87171;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--accent); }

.topbar {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  max-width: 560px; margin: 0 auto; padding: 14px 16px;
}
.topbar .brand { font-weight: 700; text-decoration: none; color: var(--ink); }
.topbar nav a { margin-left: 14px; text-decoration: none; color: var(--muted); font-size: 14px; }
.topbar nav a:hover { color: var(--ink); }

main { max-width: 560px; margin: 0 auto; padding: 8px 16px 16px; }
main.wide { max-width: 960px; }

footer {
  max-width: 560px; margin: 24px auto; padding: 0 16px 40px;
  color: var(--muted); font-size: 13px; text-align: center;
}
footer a { color: var(--muted); }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin: 14px 0;
}
h1 { font-size: 22px; margin: .2em 0 .4em; }
h2 {
  font-size: 13px; margin: 0 0 10px; color: var(--muted);
  text-transform: uppercase; letter-spacing: .05em;
}
.muted { color: var(--muted); }
.err { color: var(--danger); font-size: 14px; margin: 8px 0; }
.ok-msg { color: var(--ok); font-size: 14px; margin: 8px 0; }

/* confirmation */
.confirm { text-align: center; }
.confirm .big-mark { font-size: 56px; line-height: 1; }
.confirm.ok .big-mark { color: var(--ok); }
.confirm.warn .big-mark { color: var(--warn); }
.confirm h1 { font-size: 24px; margin-bottom: .1em; }
.confirm .loc { color: var(--muted); margin-top: 0; }
.confirm .stat { font-size: 17px; }
.confirm .stat b { font-size: 20px; }

.hero { text-align: center; }
.global-big { font-size: 28px; margin: .2em 0; }
.global-big b, .global b { font-variant-numeric: tabular-nums; }

/* buttons */
.btn, .link-btn {
  display: inline-block; border: 1px solid var(--line); background: var(--card);
  color: var(--ink); padding: 10px 16px; border-radius: 10px;
  text-decoration: none; font: inherit; cursor: pointer; margin-top: 10px;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.link-btn { border: none; background: none; color: var(--accent); padding: 8px 0; text-decoration: underline; }
.btn:hover { filter: brightness(.97); }

/* tiles / map */
.tiles { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 10px 0; }
.tiles li {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 9px; background: var(--bg); border: 1px solid var(--line);
  opacity: .45; font-size: 18px;
}
.tiles li.lit {
  opacity: 1; border-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 15%, var(--card));
}
.map-head { margin: .2em 0; }
.spot-list { list-style: none; padding: 0; margin: 8px 0; }
.spot-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 10px 0; border-bottom: 1px solid var(--line); opacity: .55;
}
.spot-list li.lit { opacity: 1; }
.spot-list .count { color: var(--muted); font-variant-numeric: tabular-nums; }
.win { color: var(--ok); font-weight: 600; }
.signed { color: var(--muted); text-align: center; font-size: 14px; }

/* bars */
.bars { display: flex; flex-direction: column; gap: 10px; }
.bar-row {
  display: grid; grid-template-columns: 1fr 120px auto; align-items: center;
  gap: 10px; font-size: 14px;
}
.bar-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar-track {
  background: var(--bg); border: 1px solid var(--line);
  border-radius: 6px; height: 14px; overflow: hidden;
}
.bar-fill { display: block; height: 100%; background: var(--accent); }
.bar-val { font-variant-numeric: tabular-nums; color: var(--muted); }
@media (max-width: 420px) { .bar-row { grid-template-columns: 1fr 70px auto; } }

/* ranking */
.ranking { list-style: none; padding: 0; margin: 0; }
.ranking li {
  display: grid; grid-template-columns: 28px 1fr auto; gap: 10px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
}
.ranking li:last-child { border-bottom: none; }
.ranking .rank { color: var(--muted); text-align: right; }
.ranking .count { font-variant-numeric: tabular-nums; }

/* forms */
.field {
  display: flex; align-items: center; gap: 6px; border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 12px; margin: 10px 0; background: var(--bg);
}
.field span { color: var(--muted); }
.field input {
  border: none; background: none; color: var(--ink); font: inherit;
  flex: 1; outline: none; min-width: 0;
}
.cta { text-align: center; }
.danger h2 { color: var(--danger); }
.prose h2 {
  text-transform: none; letter-spacing: 0; color: var(--ink);
  font-size: 15px; margin-top: 1.3em;
}
.prose ul { padding-left: 1.1em; }

/* admin */
table.grid { width: 100%; border-collapse: collapse; font-size: 13px; }
table.grid th, table.grid td {
  text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.grid .url {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; color: var(--muted); word-break: break-all;
}
form.inline { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 10px 0; }
form.inline input, form.inline select {
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 8px;
  background: var(--bg); color: var(--ink); font: inherit;
}
form.inline button {
  border: 1px solid var(--line); border-radius: 8px; padding: 6px 10px;
  background: var(--card); color: var(--ink); cursor: pointer; font: inherit;
}
.spark { display: flex; align-items: flex-end; gap: 3px; height: 60px; }
.spark-bar { flex: 1; background: var(--accent); min-height: 2px; border-radius: 2px 2px 0 0; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em;
  background: var(--bg); padding: 1px 5px; border-radius: 5px;
}

/* tic-tac-toe */
.ttt-board {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px;
  max-width: 280px; margin: 16px auto;
}
.ttt-cell {
  aspect-ratio: 1; display: grid; place-items: center;
  font: 700 40px/1 inherit; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 0; margin: 0;
}
button.ttt-cell { cursor: pointer; }
button.ttt-cell:hover { border-color: var(--accent); }
.ttt-cell.x { color: var(--accent); }
.ttt-cell.o { color: var(--warn); }
.ttt-status { text-align: center; }
.ttt-wait { text-align: center; color: var(--muted); }

.archive-grid { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 10px; }
.archive-item { text-align: center; font-size: 12px; color: var(--muted); }
.mini {
  display: grid; grid-template-columns: repeat(3, 20px); grid-auto-rows: 20px;
  gap: 2px; margin: 0 auto 5px;
}
.mini span {
  display: grid; place-items: center; font: 700 14px/1 inherit;
  background: var(--bg); border: 1px solid var(--line); border-radius: 3px;
}
.mini span.x { color: var(--accent); }
.mini span.o { color: var(--warn); }