:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #efede7;
  --ink: #1d1f23;
  --ink-2: #5d6168;
  --line: #dedbd3;
  --accent: #e8590c;
  --accent-ink: #ffffff;
  --accent-soft: #fde6d8;
  --ok: #1f9d55;
  --ok-soft: #dcf3e5;
  --ng: #d6334a;
  --ng-soft: #fbe0e4;
  --select: #2b2f36;
  --select-fill: #8d939c;
  --ok-fill: #7fd3a1;
  --ng-fill: #f29aa7;
  --land-dim: #e9e6df;
  --sea: #d9e4ea;
  --pref-line: #5d6168;
  --shadow: 0 8px 28px rgba(30, 28, 20, .12), 0 1px 3px rgba(30, 28, 20, .08);
  --radius: 18px;
  --font: "Zen Kaku Gothic New", system-ui, sans-serif;
  --font-round: "M PLUS Rounded 1c", var(--font);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16181c;
    --surface: #202329;
    --surface-2: #2a2e35;
    --ink: #eef0f3;
    --ink-2: #a3a8b1;
    --line: #363a42;
    --accent: #ff8a3d;
    --accent-ink: #1b1003;
    --accent-soft: #3b2616;
    --ok: #3ccf7c;
    --ok-soft: #173826;
    --ng: #ff6b7d;
    --ng-soft: #3d1c22;
    --select: #f1f3f5;
    --select-fill: #7b818c;
    --ok-fill: #2f7a52;
    --ng-fill: #8a3441;
    --land-dim: #2b2e34;
    --sea: #1a232d;
    --pref-line: #aab0ba;
    --shadow: 0 8px 28px rgba(0, 0, 0, .45), 0 1px 3px rgba(0, 0, 0, .4);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}
button { font: inherit; }
[hidden] { display: none !important; }

/* ---------- layout: mobile first ---------- */
.app {
  height: 100vh;
  height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-areas: "top" "map" "panel";
  position: relative;
}
.topbar {
  grid-area: top;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  z-index: 2;
}
.brand {
  margin: 0;
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: .02em;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 28px; height: 28px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 16px;
}
.progress { display: flex; align-items: center; gap: 10px; min-width: 0; margin-left: auto; }
/* quit button only while a set is in progress */
.quit-btn { display: none; flex: none; }
.app[data-phase="question"] .quit-btn,
.app[data-phase="answered"] .quit-btn { display: inline-block; }
.dots { display: flex; gap: 4px; }
.dots i {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--line);
  transition: background .2s, transform .2s;
}
.dots i.cur { background: var(--ink-2); transform: scale(1.25); }
.dots i.ok { background: var(--ok); }
.dots i.ng { background: var(--ng); }
.progress-text { font-family: var(--font-round); font-weight: 700; font-size: 14px; color: var(--ink-2); white-space: nowrap; }

.map-wrap { grid-area: map; position: relative; min-height: 0; }
#map { position: absolute; inset: 0; background: var(--sea); }

.panel {
  grid-area: panel;
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "q actions"
    "fb fb"
    "hint hint";
  align-items: center;
  gap: 8px 14px;
  z-index: 2;
  box-shadow: 0 -6px 20px rgba(0, 0, 0, .06);
}
.qcard { grid-area: q; }
.qlabel { margin: 0; font-size: 11px; color: var(--ink-2); font-weight: 500; }
.qcode {
  margin: 0;
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 40px;
  line-height: 1.05;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.actions { grid-area: actions; display: flex; justify-content: flex-end; }
.actions .btn { width: 100%; max-width: 260px; white-space: nowrap; }
.hint { grid-area: hint; margin: 0; font-size: 13px; color: var(--ink-2); text-align: center; }
.feedback { grid-area: fb; }

.verdict {
  margin: 0 0 6px;
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 18px;
}
.verdict.ok { color: var(--ok); }
.verdict.ng { color: var(--ng); }
.answer-detail { display: grid; gap: 6px; }
.area-chip {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  align-items: baseline;
  padding: 8px 12px;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: 13px;
  line-height: 1.5;
}
.area-chip.ok { background: var(--ok-soft); }
.area-chip.ng { background: var(--ng-soft); }
.area-chip b {
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}
.area-chip.ok b { color: var(--ok); }
.area-chip.ng b { color: var(--ng); }
.area-chip .tag { grid-column: 1 / -1; font-size: 11px; color: var(--ink-2); }
.area-chip .place { color: var(--ink); }
.area-chip .place small { color: var(--ink-2); }

/* ---------- buttons ---------- */
.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .08s, filter .15s, background .15s, opacity .15s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active:not(:disabled) { transform: scale(.97); }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover:not(:disabled) { filter: brightness(1.06); }
.btn.primary:disabled { background: var(--line); color: var(--ink-2); cursor: not-allowed; }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.big { padding: 15px 28px; font-size: 17px; width: 100%; }
.btn:focus-visible { outline: 3px solid var(--select); outline-offset: 2px; }

/* ---------- overlays ---------- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 16px;
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow-y: auto;
}
.sheet {
  width: 100%;
  max-width: 440px;
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  background: var(--surface);
  border-radius: 24px;
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
  animation: pop .25s ease-out;
}
@keyframes pop { from { transform: translateY(10px) scale(.98); opacity: 0; } }
.eyebrow { margin: 0; font-size: 12px; font-weight: 700; letter-spacing: .12em; color: var(--accent); }
.sheet-title { margin: 4px 0 10px; font-family: var(--font-round); font-weight: 800; font-size: 30px; }
.lead { margin: 0 0 14px; line-height: 1.7; color: var(--ink-2); font-size: 14.5px; }
.rules { margin: 0 0 18px; padding: 12px 14px 12px 32px; background: var(--surface-2); border-radius: 14px; font-size: 13.5px; line-height: 1.8; }
/* mode selector */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 0 0 12px; }
.mode { position: relative; cursor: pointer; }
.mode input { position: absolute; opacity: 0; pointer-events: none; }
.mode-ui {
  display: grid;
  gap: 2px;
  height: 100%;
  padding: 11px 12px;
  border-radius: 14px;
  border: 2px solid var(--line);
  transition: border-color .15s, background .15s;
}
.mode-ui b { font-family: var(--font-round); font-weight: 800; font-size: 15px; }
.mode-ui small { font-size: 11.5px; color: var(--ink-2); line-height: 1.4; }
.mode input:checked + .mode-ui { border-color: var(--accent); background: var(--accent-soft); }
.mode input:focus-visible + .mode-ui { outline: 3px solid var(--select); outline-offset: 2px; }
.mode input:disabled + .mode-ui { opacity: .5; cursor: not-allowed; }

.weak-box { margin: 0 0 18px; padding: 12px 14px; border-radius: 14px; background: var(--surface-2); }
.weak-head { margin: 0 0 8px; font-size: 13px; font-weight: 700; }
.weak-head small { font-weight: 500; color: var(--ink-2); margin-left: 4px; }
.weak-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.weak-list li {
  display: inline-flex; align-items: baseline; gap: 5px;
  padding: 4px 9px; border-radius: 99px;
  background: var(--surface); font-size: 11px; color: var(--ink-2);
}
.weak-list li b { font-family: var(--font-round); font-weight: 800; font-size: 14px; color: var(--ng); font-variant-numeric: tabular-nums; }
.weak-list li.more { align-self: center; }
.link-btn {
  margin-top: 10px; padding: 0; border: 0; background: none;
  color: var(--ink-2); font-size: 12px; text-decoration: underline; cursor: pointer;
}
.mode-badge {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  border-radius: 99px;
  background: var(--ng);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  vertical-align: 1px;
}
.overcome { margin: 0 0 14px; padding: 12px 14px; border-radius: 14px; background: var(--ok-soft); }
.overcome-head { margin: 0 0 2px; font-size: 12px; font-weight: 700; color: var(--ok); }
.overcome-codes { margin: 0; font-family: var(--font-round); font-weight: 800; font-size: 20px; color: var(--ok); letter-spacing: .04em; }

.best { margin: 12px 0 0; text-align: center; font-size: 13px; color: var(--ink-2); min-height: 1em; }

.score {
  margin: 2px 0 6px;
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 64px;
  line-height: 1;
  color: var(--accent);
}
.score small { font-size: 22px; color: var(--ink-2); margin-left: 6px; }
.result-list { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 6px; }
.result-list li {
  display: grid;
  grid-template-columns: 22px 52px 1fr;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 12px;
  background: var(--surface-2);
  font-size: 13px;
}
.result-list .mark { font-weight: 800; text-align: center; }
.result-list .ok .mark { color: var(--ok); }
.result-list .ng .mark { color: var(--ng); }
.result-list .code { font-family: var(--font-round); font-weight: 800; font-size: 16px; font-variant-numeric: tabular-nums; }
.result-list .where { color: var(--ink-2); line-height: 1.45; }
.sheet-actions { display: grid; gap: 10px; }

/* ---------- leaflet tweaks ---------- */
.leaflet-container { font-family: var(--font); background: var(--sea); }
.leaflet-interactive { transition: fill-opacity .15s; }
.area-tip {
  font-family: var(--font-round);
  font-weight: 800;
  font-size: 14px;
  padding: 3px 8px;
  border-radius: 8px;
  border: 0;
  box-shadow: var(--shadow);
}
.area-label {
  background: transparent; border: 0; box-shadow: none; padding: 0;
  font-family: var(--font-round); font-weight: 800; font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: #1d1f23;
  text-shadow: 0 0 3px #fff, 0 0 3px #fff, 0 0 3px #fff, 0 0 3px #fff;
}
.area-label.big { font-size: 24px; letter-spacing: .03em; }
.area-label::before { display: none; }
@media (prefers-color-scheme: dark) {
  .area-label { color: #fff; text-shadow: 0 0 3px #000, 0 0 3px #000, 0 0 3px #000, 0 0 3px #000; }
}

/* ---------- browse mode ---------- */
.browse { display: none; }
.app[data-phase="browse"] .browse { display: flex; }
.app[data-phase="browse"] .qcard,
.app[data-phase="browse"] .feedback,
.app[data-phase="browse"] .hint,
.app[data-phase="browse"] .actions { display: none; }
.app[data-phase="browse"] .panel { display: block; }
.browse {
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  height: 100%;
}
.browse-head { display: flex; gap: 8px; }
.search {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  font: inherit;
  font-size: 16px; /* 16px keeps iOS from zooming on focus */
}
.search:focus { outline: none; border-color: var(--accent); background: var(--surface); }
.btn.small { padding: 8px 14px; font-size: 13px; white-space: nowrap; }
.browse-detail {
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--accent-soft);
}
.browse-empty { margin: 0; font-size: 13px; color: var(--ink-2); }
.bd-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.bd-code { font-family: var(--font-round); font-weight: 800; font-size: 30px; color: var(--accent); line-height: 1.1; font-variant-numeric: tabular-nums; }
.bd-region { font-weight: 700; font-size: 14px; }
.bd-places { margin: 6px 0 0; font-size: 13px; line-height: 1.7; color: var(--ink-2); max-height: 7.5em; overflow-y: auto; }
.bd-stat { margin: 6px 0 0; font-size: 12px; font-weight: 700; }
.code-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  align-content: start;
  gap: 6px;
}
.code-list button {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border: 1.5px solid transparent;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  font-size: 12px;
}
.code-list button:hover { border-color: var(--line); }
.code-list button.on { border-color: var(--select); background: var(--surface); }
.code-list b { font-family: var(--font-round); font-weight: 800; font-size: 15px; font-variant-numeric: tabular-nums; flex: none; min-width: 2.2em; }
.code-list span { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.code-list .no-hit { grid-column: 1 / -1; font-size: 13px; color: var(--ink-2); padding: 8px 2px; }
.browse-btn { margin-top: 10px; }

/* ---------- desktop / tablet landscape ---------- */
@media (min-width: 900px) {
  .app {
    grid-template-columns: 1fr 380px;
    grid-template-rows: auto 1fr;
    grid-template-areas: "top top" "map panel";
  }
  .topbar { padding: 14px 24px; }
  .brand { font-size: 20px; }
  .dots i { width: 10px; height: 10px; }
  .panel {
    border-top: 0;
    border-left: 1px solid var(--line);
    box-shadow: none;
    padding: 32px 28px;
    grid-template-columns: 1fr;
    grid-template-areas: "q" "hint" "fb" "actions";
    align-content: start;
    gap: 18px;
    overflow-y: auto;
  }
  .qcard {
    padding: 22px 20px 20px;
    border-radius: var(--radius);
    background: var(--accent-soft);
    text-align: center;
  }
  .qlabel { font-size: 13px; margin-bottom: 6px; }
  .qcode { font-size: 76px; }
  .hint { text-align: left; font-size: 14px; }
  .actions .btn { max-width: none; padding: 15px 20px; font-size: 16px; }
  .verdict { font-size: 24px; }
  .area-chip { font-size: 14px; padding: 12px 14px; }
}

/* feedback phase on phones: stack so the answer text has room */
@media (max-width: 899px) {
  .app[data-phase="answered"] .panel { grid-template-areas: "fb fb" "q actions"; }
  .app[data-phase="answered"] .qcode { font-size: 28px; }
  .app[data-phase="answered"] .qlabel { display: none; }
  .app[data-phase="answered"] .hint { display: none; }
}
@media (max-width: 899px) {
  .mode-badge { display: table; margin: 0 0 3px; }
  .app[data-phase="browse"] .panel { height: 44dvh; }
  .bd-code { font-size: 24px; }
  .bd-places { max-height: 5.1em; }
  .code-list { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}
@media (max-width: 420px) {
  /* make room for the quit button: keep only the ☎ mark during a set */
  .app[data-phase="question"] .brand-text,
  .app[data-phase="answered"] .brand-text { display: none; }
  .dots i { width: 6px; height: 6px; }
  .dots { gap: 3px; }
  .progress-text { font-size: 12px; }
}
@media (max-width: 399px) {
  .progress .dots { display: none; }
}