:root {
  --bg: #eef1f5;
  --surface: #ffffff;
  --surface-2: #f6f8fb;
  --border: #d3d9e2;
  --text: #0f172a;
  --muted: #5b6475;
  --primary: #1d4ed8;
  --primary-hover: #1e40af;
  --primary-text: #1d4ed8;
  --on-color: #ffffff;
  --go: #15803d;
  --go-hover: #116632;
  --go-soft: #e3f4e8;
  --go-text: #15803d;
  --stop: #dc2626;
  --stop-hover: #b91c1c;
  --stop-soft: #fde8e8;
  --stop-text: #c81e1e;
  --done-soft: #e6eefc;
  --warn: #b45309;
  --warn-soft: #fdf1df;
  --gold: #c99a06;
  --silver: #8a94a3;
  --bronze: #b0672d;
  --radius: 12px;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 2px 8px rgb(15 23 42 / 5%);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

/* Dark theme: follows the device unless the viewer picked a theme (data-theme on <html>, set in app.js). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1218;
    --surface: #161e28;
    --surface-2: #1c2531;
    --border: #2d3a4a;
    --text: #eef2f7;
    --muted: #9ba7b7;
    --primary: #3b74f0;
    --primary-hover: #2f62d4;
    --primary-text: #8db1ff;
    --go-soft: #12301f;
    --go-text: #4ade80;
    --stop-soft: #3a1717;
    --stop-text: #ff7a7a;
    --done-soft: #172741;
    --warn: #f0a648;
    --warn-soft: #3a2a12;
    --shadow: none;
    color-scheme: dark;
  }
}
/* Same values as above, for viewers who picked Dark. Keep the two blocks in sync. */
:root[data-theme="dark"] {
  --bg: #0d1218;
  --surface: #161e28;
  --surface-2: #1c2531;
  --border: #2d3a4a;
  --text: #eef2f7;
  --muted: #9ba7b7;
  --primary: #3b74f0;
  --primary-hover: #2f62d4;
  --primary-text: #8db1ff;
  --go-soft: #12301f;
  --go-text: #4ade80;
  --stop-soft: #3a1717;
  --stop-text: #ff7a7a;
  --done-soft: #172741;
  --warn: #f0a648;
  --warn-soft: #3a2a12;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 16px 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}
.topbar-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.who { font-weight: 600; margin-right: 4px; }

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 20px 16px calc(40px + env(safe-area-inset-bottom, 0px));
}
.narrow { max-width: 440px; margin: 0 auto; }

h1 { font-size: 1.6rem; margin: 0 0 4px; line-height: 1.2; }
h2 { font-size: 1.15rem; margin: 0 0 12px; }
h3 { font-size: 0.95rem; margin: 0 0 10px; color: var(--muted); }
p { margin: 0 0 12px; }
a { color: var(--primary-text); }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
.center { text-align: center; }
.spaced { margin-top: 28px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.stack { display: grid; gap: 14px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.center-row { justify-content: center; }
.page-head { margin-bottom: 18px; }

/* ---------- forms ---------- */

label { display: grid; gap: 6px; font-weight: 600; font-size: 0.95rem; }
input, select {
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: 10px;
}
select.select-sm { width: auto; min-height: 38px; padding: 6px 10px; font-size: 0.9rem; }
input:focus, select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgb(59 116 240 / 25%); }
input.code {
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  font-family: var(--mono);
}
.form-inline { display: grid; gap: 14px; }
@media (min-width: 600px) {
  .form-inline { grid-template-columns: 1fr auto; align-items: end; }
}
.error { color: var(--stop-text); font-weight: 600; min-height: 1.2em; margin: 0; }

/* ---------- buttons ---------- */

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 48px;
  padding: 10px 18px;
  font: inherit;
  font-weight: 700;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  touch-action: manipulation;
  user-select: none;
  transition: background-color 0.12s ease, transform 0.06s ease;
}
button:active:not(:disabled) { transform: scale(0.98); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible, .btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.btn-primary { background: var(--primary); color: var(--on-color); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-go { background: var(--go); color: var(--on-color); }
.btn-go:hover:not(:disabled) { background: var(--go-hover); }
.btn-go.armed { background: var(--go-hover); box-shadow: 0 0 0 4px var(--go-soft); }
.btn-stop { background: var(--stop); color: var(--on-color); }
.btn-stop:hover:not(:disabled) { background: var(--stop-hover); }
.btn-stop.armed { background: var(--stop-hover); box-shadow: 0 0 0 4px var(--stop-soft); }
.btn-ghost { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); }
.btn-danger-ghost { background: transparent; color: var(--stop-text); border: 1.5px solid currentColor; }
.btn-danger-ghost.armed { background: var(--stop); color: var(--on-color); border-color: var(--stop); }
.btn-sm { min-height: 38px; padding: 6px 12px; font-size: 0.9rem; }
.btn-block { width: 100%; }
.btn-huge { width: 100%; min-height: 72px; font-size: 1.3rem; }
.btn-stop-huge {
  width: 100%;
  min-height: min(38vh, 260px);
  font-size: clamp(2.2rem, 9vw, 3.5rem);
  letter-spacing: 0.12em;
  border-radius: 20px;
  box-shadow: 0 6px 0 var(--stop-hover);
}
.btn-stop-huge:active:not(:disabled) { transform: translateY(4px); box-shadow: 0 2px 0 var(--stop-hover); }

/* ---------- chips ---------- */

.chip {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  vertical-align: middle;
  white-space: nowrap;
}
.chip-waiting { background: var(--warn-soft); color: var(--warn); }
.chip-running { background: var(--stop); color: var(--on-color); }
.chip-finished { background: var(--done-soft); color: var(--primary-text); }
.chip-role { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }

/* ---------- invite + host controls ---------- */

.invite {
  display: grid;
  gap: 6px;
  text-align: center;
  background: var(--primary);
  color: var(--on-color);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.invite-code {
  font-family: var(--mono);
  font-size: clamp(2.4rem, 10vw, 4rem);
  font-weight: 800;
  letter-spacing: 0.2em;
  line-height: 1.1;
  word-break: break-all;
}
.invite .btn { background: rgb(255 255 255 / 18%); color: var(--on-color); }
.invite .btn:hover { background: rgb(255 255 255 / 28%); }
.invite-link { font-size: 0.9rem; opacity: 0.9; word-break: break-all; }

.host-controls { display: grid; gap: 12px; }
.participating {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--go-soft);
  color: var(--go-text);
}
.host-controls p { margin: 0; }
.is-live { border: 2px solid var(--stop); }

.clock {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: clamp(2.6rem, 12vw, 4.5rem);
  line-height: 1.1;
  text-align: center;
}

/* ---------- shooter panels ---------- */

.stop-panel { display: grid; gap: 16px; border: 2px solid var(--stop); background: var(--stop-soft); }
.stop-panel .clock { color: var(--stop-text); }
.stop-panel p { margin: 0; }

.my-result { text-align: center; border: 2px solid var(--primary); background: var(--done-soft); }
.my-result .clock { color: var(--primary-text); }
.my-rank { font-size: 1.3rem; font-weight: 800; margin-top: 4px; }

.waiting { display: flex; gap: 16px; align-items: center; border: 2px dashed var(--warn); background: var(--warn-soft); }
.pulse {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--warn);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.75); }
}
@media (prefers-reduced-motion: reduce) { .pulse { animation: none; } }

.banner {
  padding: 12px 16px;
  border-radius: 10px;
  font-weight: 600;
  margin-bottom: 16px;
  background: var(--warn-soft);
  color: var(--warn);
  border: 1.5px solid currentColor;
}

/* ---------- leaderboard ---------- */

.table-wrap { overflow-x: auto; }
table.board { width: 100%; border-collapse: collapse; }
.board th, .board td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); }
.board th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.board td.time { font-family: var(--mono); font-variant-numeric: tabular-nums; font-weight: 700; }
.board td.actions { text-align: right; width: 1%; white-space: nowrap; }
.board th.num, .board td.num { text-align: right; font-variant-numeric: tabular-nums; }
.board td.nowrap { white-space: nowrap; }
.board tr:last-child td { border-bottom: 0; }
.board tr.is-me td { background: var(--done-soft); font-weight: 700; }
.rank {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-weight: 800;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
}
.rank-1 { background: var(--gold); border-color: var(--gold); color: #fff; }
.rank-2 { background: var(--silver); border-color: var(--silver); color: #fff; }
.rank-3 { background: var(--bronze); border-color: var(--bronze); color: #fff; }

.pending { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }
.name-list { display: flex; flex-wrap: wrap; gap: 8px; }
.name-pill {
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  font-weight: 600;
}
.name-pill.is-running { border-color: var(--stop); background: var(--stop-soft); }
.name-pill.is-me { border-color: var(--primary); outline: 2px solid var(--primary); outline-offset: 1px; }

.empty { text-align: center; padding: 24px 12px; color: var(--muted); }

.card-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.card-head h2 { margin: 0; }

/* ---------- stats ---------- */

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}
.stat-label { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.stat-value { font-size: 1.9rem; font-weight: 800; line-height: 1.2; font-variant-numeric: tabular-nums; }

/* ---------- lists ---------- */

.item-list { display: grid; gap: 10px; }
.item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
}
.item:hover { border-color: var(--primary); }
.item .title { font-weight: 700; }
.item .code { font-family: var(--mono); font-weight: 700; letter-spacing: 0.1em; }
.item .result { text-align: right; flex: 0 0 auto; }
.item .result .time { font-family: var(--mono); font-variant-numeric: tabular-nums; font-weight: 800; font-size: 1.1rem; }
.live-text { color: var(--stop-text); font-weight: 700; }

details > summary { cursor: pointer; font-weight: 700; min-height: 32px; }
details[open] > summary { margin-bottom: 12px; }

/* ---------- toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  max-width: calc(100% - 32px);
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  box-shadow: 0 6px 20px rgb(0 0 0 / 25%);
  z-index: 20;
}
.toast.is-error { background: var(--stop); color: #fff; }