:root {
  --paper: #f3eadb;
  --paper-2: #e7dcc8;
  --ink: #221c16;
  --muted: #6d6256;
  --clay: #b64024;
  --clay-dark: #8c3018;
  --tile: #fffaf2;
  --board: #241f1a;
  --cell: #3a332c;
  --line: rgba(34, 28, 22, 0.12);
  --shadow: 0 16px 40px rgba(48, 32, 18, 0.12);
  --sans: "Segoe UI", "Helvetica Neue", sans-serif;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -10%, rgba(182, 64, 36, 0.08), transparent 36%),
    linear-gradient(180deg, #f7f1e6 0%, var(--paper) 40%, #efe4d2 100%);
  min-height: 100%;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; }
.app { min-height: 100%; }

.shell {
  width: min(100%, 36rem);
  margin: 0 auto;
  padding: calc(12px + env(safe-area-inset-top)) 12px calc(18px + env(safe-area-inset-bottom));
}

.wordmark {
  font-family: var(--serif);
  font-size: 2rem;
  letter-spacing: 0.04em;
  margin: 0;
  line-height: 1;
}
.wordmark span {
  display: inline-block;
  transform: translateY(-0.08em);
  color: var(--clay);
}
.tag {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card, .panel {
  background: rgba(255, 250, 242, 0.78);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.setup { margin-top: 18px; padding: 14px; }
.group { margin: 0 0 12px; }
.group h2 {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}
.choices { display: grid; gap: 8px; }
.choice, .go, .act, .ready, .letter-key, .mark-key {
  border: 1px solid var(--line);
  background: #fffaf2;
  border-radius: 14px;
  min-height: 48px;
  padding: 10px 12px;
  text-align: left;
}
.choice strong { display: block; font-family: var(--serif); font-size: 1.05rem; }
.choice span { display: block; color: var(--muted); font-size: 0.86rem; margin-top: 2px; }
.choice.on {
  border-color: var(--clay);
  background: #fff1ea;
  box-shadow: inset 4px 0 0 var(--clay);
}
.go, .act.primary, .ready {
  background: var(--ink);
  color: #fffaf2;
  text-align: center;
  font-weight: 700;
  border-color: var(--ink);
}
.go { width: 100%; min-height: 52px; margin-top: 4px; }
.rules {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.88rem;
}
.rules summary { cursor: pointer; color: var(--ink); font-weight: 700; }
.rules p { margin: 8px 0 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  margin-bottom: 10px;
}
.scores { display: flex; gap: 8px; }
.score {
  min-width: 4.6rem;
  padding: 6px 8px;
  border-radius: 12px;
  background: rgba(255, 250, 242, 0.8);
  border: 1px solid transparent;
}
.score b { display: block; font-family: var(--serif); font-size: 1.15rem; }
.score span { color: var(--muted); font-size: 0.72rem; }
.score.on { border-color: var(--clay); background: #fff; }
.bag {
  color: var(--muted);
  font-size: 0.8rem;
  text-align: right;
}

.board-wrap { padding: 8px; }
.board {
  display: grid;
  grid-template-columns: repeat(15, 1fr);
  gap: 2px;
  background: var(--board);
  padding: 6px;
  border-radius: 14px;
  font-size: calc((min(100vw, 36rem) - 48px) / 22);
}
.sq {
  position: relative;
  aspect-ratio: 1;
  border: 0;
  padding: 0;
  border-radius: 4px;
  background: var(--cell);
  color: #f3eadb;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sq .lab, .sq .star {
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0;
}
.sq .lab { font-size: 0.62em; }
.sq .star { font-size: 0.55em; }
.sq .stack { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.sq.has .lab, .sq.has .star, .sq.has .stack { visibility: hidden; }
.p-3W {
  background-color: #7c3428;
  background-image: repeating-linear-gradient(45deg, rgba(255, 250, 242, 0.22) 0 2px, transparent 2px 6px);
}
.p-2W {
  background-color: #8a5b2c;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(255, 250, 242, 0.2) 3px 4px),
    repeating-linear-gradient(90deg, transparent 0 3px, rgba(255, 250, 242, 0.2) 3px 4px);
}
.p-3L {
  background-color: #1e5158;
  background-image: radial-gradient(rgba(255, 250, 242, 0.7) 0.8px, transparent 1px);
  background-size: 5px 5px;
}
.p-2L {
  background-color: #44502e;
  background-image: repeating-linear-gradient(-45deg, rgba(255, 250, 242, 0.28) 0 1px, transparent 1px 5px);
}
.face {
  position: absolute;
  inset: 1px;
  border-radius: 3px;
  background: var(--tile);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1em;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset;
}
.face.draft { outline: 2px dashed var(--clay); outline-offset: -2px; }
.face.blank { color: var(--clay-dark); background: #f6efe4; }
.face .pt {
  position: absolute;
  right: 1px;
  bottom: 0;
  font-family: var(--sans);
  font-size: 0.42em;
  font-weight: 700;
}
.sq.sel .face { outline: 2px solid var(--ink); outline-offset: -2px; }

.note {
  min-height: 1.3em;
  margin: 8px 2px;
  font-size: 0.92rem;
}
.note.bad { color: var(--clay-dark); font-weight: 700; }
.note.ok { color: #315c3a; }
.meanings { display: flex; flex-direction: column; gap: 8px; margin: 0 0 8px; }
.mean { padding: 8px 10px; }
.mean-top { display: flex; align-items: baseline; gap: 8px; }
.mean-top b { font-family: var(--serif); font-size: 1.35rem; }
.lang {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 2px 8px;
}
.lang.vi { background: #efe4cf; }
.lang.en { background: #e4eee6; }
.mean p, .alts-mini { margin: 4px 0 0; font-size: 0.9rem; }
.alts-mini { color: var(--muted); font-size: 0.82rem; }

.pad, .alphabet, .sheet {
  margin: 8px 0;
  padding: 10px;
}
.pad p, .sheet p, .alphabet p { margin: 0 0 8px; color: var(--muted); font-size: 0.82rem; }
.mark-row, .alpha-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.mark-key, .letter-key {
  min-width: 44px;
  min-height: 44px;
  text-align: center;
  padding: 0 8px;
  font-family: var(--serif);
  font-size: 1.15rem;
}
.mark-key small { display: block; font-family: var(--sans); font-size: 0.62rem; color: var(--muted); }
.mark-key.on, .letter-key.on, .rack-tile.on, .rack-tile.ex {
  border-color: var(--clay);
  background: #fff1ea;
}
.preview-letter {
  font-family: var(--serif);
  font-size: 1.8rem;
  margin-right: 8px;
}

.rack {
  display: flex;
  justify-content: center;
  gap: 6px;
  min-height: 62px;
  margin: 6px 0 10px;
}
.rack-tile {
  width: 46px;
  height: 54px;
  border-radius: 10px;
  border: 1px solid #ddcbb4;
  background: var(--tile);
  box-shadow: 0 2px 0 #e4d3bd;
  position: relative;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 700;
}
.rack-tile .pt {
  position: absolute;
  right: 4px;
  bottom: 3px;
  font-family: var(--sans);
  font-size: 0.65rem;
}
.rack-tile.blank { color: var(--clay-dark); }
.actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.act { text-align: center; font-weight: 700; }
.act.primary { grid-column: 1 / -1; }
.act:disabled { opacity: 0.45; cursor: default; }

.footer {
  margin: 16px 4px 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.4;
}

.cover, .loading {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.cover-card, .loading-card {
  width: min(100%, 28rem);
  padding: 22px 18px;
  text-align: center;
}
.cover-card h2, .loading-card h2 { font-family: var(--serif); font-size: 2rem; margin: 0 0 8px; }
.ready { width: 100%; margin-top: 16px; }
.sheet h3 { font-family: var(--serif); margin: 0 0 4px; font-size: 1.6rem; }
.sheet .alts { margin: 0; padding-left: 18px; }
.sheet li { margin: 4px 0; }
.end h2 { font-family: var(--serif); margin-top: 0; }
.remain { font-size: 0.9rem; color: var(--muted); }
.log { margin: 8px 0 0; padding-left: 18px; color: var(--muted); font-size: 0.86rem; }

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 8px 0;
  color: var(--muted);
  font-size: 0.86rem;
}
.field input {
  min-height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fffaf2;
  padding: 8px 12px;
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.codebox {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0 0;
}
.codebox b {
  font-family: var(--serif);
  font-size: 1.45rem;
  letter-spacing: 0.14em;
}
.codebox .act { min-height: 40px; width: auto; padding: 6px 10px; }
.text-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  min-height: 32px;
  padding: 2px 0;
}
.seat-key { margin: 4px 0 0; font-size: 0.82rem; }
.seat-key code { font-size: 0.95rem; letter-spacing: 0.08em; }
.pad.pop, .alphabet.pop {
  position: fixed;
  z-index: 30;
  margin: 0;
  max-height: min(70vh, 28rem);
  overflow: auto;
}
.sq.drop { box-shadow: inset 0 0 0 2px #fffaf2; }
.rack.drop { outline: 2px dashed var(--clay); outline-offset: 4px; border-radius: 12px; }
.rack-tile, .sq.has, .ghost { touch-action: none; user-select: none; }
.ghost {
  position: fixed;
  z-index: 40;
  width: 46px;
  height: 54px;
  margin: -27px 0 0 -23px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid #ddcbb4;
  background: var(--tile);
  color: var(--ink);
  box-shadow: 0 10px 24px rgba(48, 32, 18, 0.28);
  pointer-events: none;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 700;
}
.ghost[hidden] { display: none; }
.ghost .pt {
  position: absolute;
  right: 4px;
  bottom: 3px;
  font-family: var(--sans);
  font-size: 0.65rem;
  font-style: normal;
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}