:root {
  --bg: #14213d;
  --bg-2: #1b2b4f;
  --surface: #23365f;
  --line: #34497a;
  --text: #f5f7fb;
  --muted: #9fb0d0;
  --tile: #fbf3e2;
  --tile-text: #14213d;
  --accent: #fca311;
  --accent-text: #1a1203;
  --good: #2ec27e;
  --dup: #f6c343;
  --bad: #e5484d;
  --rival: #7cc4ff;
  --radius: 14px;
  --gutter: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation; /* no double-tap zoom */
}

button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
button:disabled { opacity: 0.5; cursor: default; }

.screen {
  display: none;
  flex-direction: column;
  min-height: 100dvh;
  padding: calc(env(safe-area-inset-top) + 12px) calc(env(safe-area-inset-right) + var(--gutter))
           calc(env(safe-area-inset-bottom) + 16px) calc(env(safe-area-inset-left) + var(--gutter));
  max-width: 560px;
  margin: 0 auto;
}
.screen.active { display: flex; }

/* ---------- Home ---------- */
.brand { text-align: center; margin: 16px 0 24px; }
.brand h1 { margin: 12px 0 0; font-size: 28px; letter-spacing: 0.5px; }
.logo { display: inline-grid; grid-template-columns: repeat(2, 44px); gap: 6px; }
.logo span {
  display: grid; place-items: center; height: 44px; border-radius: 10px;
  background: var(--tile); color: var(--tile-text); font-weight: 800; font-size: 22px;
  box-shadow: 0 3px 0 #cbbf9f;
}
.logo span:nth-child(2) { background: var(--accent); box-shadow: 0 3px 0 #b87200; }

.play-buttons { display: grid; gap: 12px; }
.btn {
  border-radius: var(--radius); padding: 14px 18px; font-weight: 700; font-size: 17px;
  transition: transform 0.08s ease;
}
.btn:active:not(:disabled) { transform: scale(0.97); }
.btn.primary { background: var(--accent); color: var(--accent-text); }
.btn.secondary { background: var(--surface); color: var(--text); }
.btn.big { display: flex; flex-direction: column; align-items: flex-start; padding: 16px 20px; text-align: left; }
.btn-title { font-size: 20px; }
.btn-sub { font-size: 14px; font-weight: 500; opacity: 0.8; margin-top: 2px; }

.settings { display: grid; gap: 10px; }
.settings-group { margin: 22px 0 10px; font-size: 13px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; color: var(--muted); }
.reset-btn { width: 100%; margin-top: 6px; font-size: 15px; padding: 10px; }
.setting-note { margin: 0; font-size: 13px; color: var(--muted); line-height: 1.35; }
.status { margin: 12px 0 0; text-align: center; font-size: 14px; color: var(--muted); }
.status[hidden] { display: none; }
.settings-link {
  margin-top: 16px; width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  background: var(--bg-2); border-radius: 12px; padding: 12px 14px; font-size: 14px; text-align: left;
}
.settings-link #settings-summary { color: var(--muted); }
.settings-link-label { font-weight: 700; color: var(--text); flex: none; }
.screen-head { display: grid; grid-template-columns: 40px 1fr 40px; align-items: center; }
.screen-head h2 { margin: 0; text-align: center; font-size: 20px; }
.setting { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.label { color: var(--muted); font-size: 15px; }
.seg { display: flex; background: var(--bg-2); border-radius: 10px; padding: 3px; }
.seg button { padding: 7px 12px; border-radius: 8px; font-size: 14px; font-weight: 600; color: var(--muted); }
.seg button.on { background: var(--surface); color: var(--text); }

.stats {
  margin-top: 24px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px;
}
.stat { background: var(--bg-2); border-radius: 12px; padding: 10px; text-align: center; }
.stat b { display: block; font-size: 20px; }
.stat span { font-size: 12px; color: var(--muted); }
.spotting { margin-top: 16px; background: var(--bg-2); border-radius: 12px; padding: 12px 14px; }
.spotting:empty { display: none; }
.spotting h3 { margin: 0 0 8px; font-size: 14px; color: var(--muted); font-weight: 600; }
.spot-row { display: grid; grid-template-columns: 1fr 90px 36px; align-items: center; gap: 10px; font-size: 14px; padding: 3px 0; }
.spot-bar { height: 6px; background: var(--surface); border-radius: 3px; overflow: hidden; }
.spot-bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.spot-row .pct { text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.fine { color: var(--muted); font-size: 13px; margin-top: auto; padding-top: 20px; text-align: center; }
.fine.center { margin: 8px 0 0; padding: 0; }

/* ---------- Game ---------- */
.hud { display: flex; align-items: center; justify-content: space-between; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 12px; background: var(--bg-2);
  color: var(--muted); font-size: 15px; font-weight: 700;
}
.timer { font-size: 30px; font-weight: 800; font-variant-numeric: tabular-nums; }
.timer.low { color: var(--bad); }

.scores { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
.score {
  background: var(--bg-2); border-radius: 12px; padding: 8px 12px;
  display: grid; grid-template-columns: 1fr auto; align-items: baseline;
}
.score .who { font-size: 13px; color: var(--muted); font-weight: 600; }
.score > span:nth-child(2) { font-size: 26px; font-weight: 800; text-align: right; font-variant-numeric: tabular-nums; }
.score .count { grid-column: 1 / -1; font-size: 12px; color: var(--muted); }
.score.you > span:nth-child(2) { color: var(--accent); }
.score.rival > span:nth-child(2) { color: var(--rival); }
.score.rival.bump { animation: bump 0.35s ease; }
.scores.solo { grid-template-columns: 1fr; }
.scores[hidden] { display: none; }
.scores.solo .rival { display: none; }
@keyframes bump { 50% { transform: scale(1.06); } }

/* Mastery */
.icon-btn.text-btn { width: auto; padding: 0 14px; color: var(--text); font-size: 15px; }
#game.mastery .timer { font-size: 26px; }
.mastery-panel { margin-top: 10px; background: var(--bg-2); border-radius: 12px; padding: 10px 12px; }
.mastery-panel[hidden] { display: none; }
.m-bar { position: relative; height: 10px; background: var(--surface); border-radius: 5px; }
.m-bar i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 5px; transition: width 0.3s ease; }
.m-bar.met i { background: var(--good); }
.m-goal { position: absolute; top: -3px; bottom: -3px; width: 3px; margin-left: -1.5px; background: var(--text); border-radius: 2px; }
.m-row { display: flex; justify-content: space-between; gap: 8px; margin-top: 6px; font-size: 13px; color: var(--muted); }
.m-ladder { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.rung { font-size: 12px; background: var(--surface); border-radius: 6px; padding: 2px 7px; color: var(--muted); font-variant-numeric: tabular-nums; }
.rung b { color: var(--text); }
.rung.done { background: rgba(46, 194, 126, 0.25); }
.chip.helped { opacity: 0.6; }
.goal-text { margin: 0 0 16px; color: var(--muted); line-height: 1.4; }
.goal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.hint-row[hidden] { display: none; }
.hint-row { display: flex; align-items: center; gap: 10px; margin-top: 10px; min-height: 36px; }
.hint-btn {
  flex: none; background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 7px 12px; font-size: 14px; font-weight: 700; color: var(--text);
}
.hint-btn span { color: var(--muted); font-weight: 600; }
.hint-btn.ready { border-color: var(--rival); animation: ready 1.6s ease-in-out infinite; }
@keyframes ready { 50% { box-shadow: 0 0 0 5px rgba(124, 196, 255, 0.25); } }
.hint-msg { font-size: 14px; color: var(--muted); line-height: 1.25; }
.hint-msg.active { color: var(--rival); font-weight: 600; }
.current {
  height: 48px; margin: 10px 0 6px; display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 28px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase;
}
.current #current-pts { font-size: 15px; color: var(--muted); letter-spacing: 0; }
.current.good { color: var(--good); }
.current.dup { color: var(--dup); }
.current.bad { color: var(--bad); animation: shake 0.3s ease; }
@keyframes shake { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }

.board-wrap { position: relative; width: min(100%, 58dvh); margin: 0 auto; aspect-ratio: 1; }
.board {
  --n: 4;
  position: absolute; inset: 0; display: grid; gap: 3%;
  grid-template-columns: repeat(var(--n), 1fr); grid-template-rows: repeat(var(--n), 1fr);
  touch-action: none;
  container-type: inline-size;
}
.tile {
  display: grid; place-items: center; border-radius: 16%;
  background: var(--tile); color: var(--tile-text);
  font-weight: 800; font-size: calc(100cqw / var(--n) * 0.42);
  box-shadow: 0 4px 0 #cbbf9f; text-transform: uppercase;
  transition: background 0.1s ease, transform 0.1s ease;
}
.tile.qu { font-size: calc(100cqw / var(--n) * 0.32); text-transform: none; }
.tile.pulse { outline: 3px solid var(--rival); outline-offset: 3px; animation: pulse 1.1s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px var(--rival), 0 4px 0 #cbbf9f; } }
.tile.glow { background: #a9d8ff; box-shadow: 0 4px 0 #5f9fd6; }
.tile.guide { background: #7cc4ff; box-shadow: 0 4px 0 #3d86c6; }
.tile.family { outline: 3px solid var(--rival); outline-offset: 3px; background: #a9d8ff; animation: pulse 1.1s ease-in-out infinite; }
.tile.family-alt { outline: 3px dashed var(--rival); outline-offset: 3px; }
.tile.starter { outline: 3px dashed var(--rival); outline-offset: 3px; }
.tile.starter-first { outline-style: solid; background: #e4f2ff; }
/* Hint highlights come before .sel so a traced tile always shows as selected. */
.tile.sel { background: var(--accent); box-shadow: 0 4px 0 #b87200; transform: translateY(1px); }
.board.good .tile.sel { background: var(--good); box-shadow: 0 4px 0 #1c8a57; }
.board.dup .tile.sel { background: var(--dup); box-shadow: 0 4px 0 #b08c26; }
.board.bad .tile.sel { background: var(--bad); box-shadow: 0 4px 0 #9d2a2e; color: #fff; }

.trace { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.trace polyline {
  fill: none; stroke: #fff; stroke-opacity: 0.5; stroke-linecap: round; stroke-linejoin: round;
}

.found {
  margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; align-content: flex-start;
  overflow-y: auto; flex: 1; min-height: 60px;
}
.chip {
  background: var(--bg-2); border-radius: 8px; padding: 4px 9px; font-size: 14px; font-weight: 600;
  text-transform: lowercase;
}
.chip.new { animation: pop 0.3s ease; }
@keyframes pop { 0% { transform: scale(0.6); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }

.overlay {
  position: fixed; inset: 0; background: rgba(10, 16, 32, 0.8); display: grid; place-items: center; z-index: 10;
}
.overlay[hidden] { display: none; }
.overlay-card { background: var(--bg-2); padding: 24px 32px; border-radius: 18px; text-align: center; }
.overlay-card h2 { margin: 0 0 16px; }
.overlay#countdown { background: var(--bg); }
.count-big { font-size: 110px; font-weight: 900; color: var(--accent); animation: pop 0.4s ease; }

/* ---------- Results ---------- */
.result-head { text-align: center; }
.result-head h2 { margin: 8px 0 2px; font-size: 30px; }
.result-head p { margin: 0; color: var(--muted); }
.result-scores { display: flex; justify-content: center; gap: 28px; margin-top: 12px; }
.result-scores div { text-align: center; }
.result-scores b { display: block; font-size: 36px; }
.result-scores span { font-size: 13px; color: var(--muted); }

.mini-wrap { position: relative; width: min(60%, 220px); aspect-ratio: 1; margin: 16px auto 0; }
.board.mini .tile { box-shadow: 0 2px 0 #cbbf9f; }
.board.mini .tile.start { background: var(--good); box-shadow: 0 2px 0 #1c8a57; }

.definition {
  margin-top: 10px; background: var(--bg-2); border-radius: 12px; padding: 10px 14px;
  font-size: 15px; line-height: 1.35;
}
.definition[hidden] { display: none; }
.def-pos { color: var(--muted); font-style: italic; font-size: 14px; }
.def-text { margin-top: 2px; }
.def-base { margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line); }
.lessons { display: grid; gap: 10px; margin-top: 14px; }
.lesson { background: var(--bg-2); border-radius: 12px; padding: 12px 14px; border-left: 3px solid var(--rival); }
.lesson h3 { margin: 0 0 4px; font-size: 15px; }
.lesson p { margin: 0 0 8px; font-size: 14px; color: var(--muted); line-height: 1.35; }
.lesson .chips { display: flex; flex-wrap: wrap; gap: 6px; }
.lesson .chip { background: var(--surface); }
.lesson .chip.active { background: var(--rival); color: var(--bg); }
.tabs { display: flex; background: var(--bg-2); border-radius: 10px; padding: 3px; margin-top: 16px; }
.tabs button { flex: 1; padding: 8px; border-radius: 8px; font-weight: 600; font-size: 14px; color: var(--muted); }
.tabs button.active { background: var(--surface); color: var(--text); }

.word-list {
  margin-top: 10px; display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 4px 12px;
  overflow-y: auto; flex: 1; min-height: 120px; align-content: start;
}
.word-row {
  display: flex; justify-content: space-between; padding: 6px 8px; border-radius: 8px; font-size: 15px;
  text-align: left;
}
.word-row.active { background: var(--surface); }
.word-row .pts { color: var(--muted); font-variant-numeric: tabular-nums; }
.word-row.both .w::after { content: " •"; color: var(--rival); }
.word-row.rare .w { color: var(--muted); }
.word-row.cancelled .pts { text-decoration: line-through; }
.legend { grid-column: 1 / -1; font-size: 12px; color: var(--muted); padding: 2px 8px 6px; }
.result-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }

/* ---------- Easter egg ---------- */
.overlay.egg { z-index: 20; }
.egg-card { max-width: 320px; margin: 0 var(--gutter); }
.egg-card img { display: block; max-width: 100%; max-height: 240px; min-width: 150px; height: auto; border-radius: 12px; margin: 0 auto 14px; }
.egg-card img[hidden], .egg-card button[hidden] { display: none; }
.egg-card h2 { margin: 0 0 6px; }
.egg-card .setup-note { font-size: 14px; font-weight: 400; color: var(--muted); margin: 0 0 12px; }
.setup-card { max-height: 90dvh; overflow-y: auto; text-align: left; }
.pic-slot { border-top: 1px solid var(--line); padding: 10px 0; }
.pic-head { display: flex; justify-content: space-between; gap: 8px; font-size: 15px; }
.pic-status { color: var(--muted); font-size: 13px; }
.egg-card .pic-preview { max-height: 110px; min-width: 0; margin: 8px 0; }
.pic-actions { display: flex; gap: 8px; margin-top: 6px; }
.pic-actions .btn { flex: 1; padding: 8px; font-size: 15px; }
#setup-close, #setup-off { width: 100%; margin-top: 8px; }
.file-btn { position: relative; cursor: pointer; text-align: center; }
.file-btn input { position: absolute; inset: 0; opacity: 0; width: 100%; }
.egg-card p { margin: 0 0 18px; font-size: 18px; font-weight: 600; line-height: 1.35; }
.egg-test {
  position: fixed; top: env(safe-area-inset-top); left: 0; right: 0; z-index: 40;
  display: flex; justify-content: center; align-items: center; gap: 10px;
  background: #5b2a86; color: #fff; font-size: 13px; padding: 6px 10px;
}
.egg-test[hidden] { display: none; }
.egg-test button { background: rgba(255, 255, 255, 0.2); border-radius: 6px; padding: 3px 8px; font-size: 13px; font-weight: 600; }
.toast {
  pointer-events: none; /* never block taps underneath */
  position: fixed; left: 50%; bottom: calc(env(safe-area-inset-bottom) + 24px); transform: translateX(-50%);
  background: var(--surface); color: var(--text); padding: 8px 14px; border-radius: 10px; font-size: 14px; z-index: 30;
}
.toast[hidden] { display: none; }

/* Mastery adds a progress panel and hint row, so the board gives up a little height. */
#game.mastery .board-wrap { width: min(100%, 50dvh); }
#game.mastery .current { height: 36px; margin: 6px 0 4px; font-size: 24px; }
#game.mastery .hint-row { margin-top: 8px; min-height: 32px; }
#game.mastery .found { margin-top: 10px; }