:root, html[data-theme="walnut"] {
  --bg: #1a1410;
  --ink: #f4ecd8;
  --muted: #cbb89a;
  --light: #e6d0a8;
  --dark: #6b3f24;
  --hi: #d4a017;
  --ok: #3d6b3a;
  --card: #241c16;
  --danger: #a33;
  color-scheme: dark;
}
html[data-theme="forest"] {
  --bg: #10160f; --ink: #e8f0dc; --muted: #9bb08a; --light: #c5d4a8; --dark: #3d5a32; --hi: #c4d44a; --card: #172016;
}
html[data-theme="ice"] {
  --bg: #0e141c; --ink: #e4eef8; --muted: #8aa4bc; --light: #d5e3f0; --dark: #3a5874; --hi: #7ec8e8; --card: #15202c;
}
html[data-theme="midnight"] {
  --bg: #0c0c12; --ink: #eee8ff; --muted: #9b93b8; --light: #c8c2e0; --dark: #3a3358; --hi: #b07cff; --card: #16141f;
}
html[data-theme="rose"] {
  --bg: #1a1012; --ink: #fde8ee; --muted: #d19aaa; --light: #f0c8c8; --dark: #7a3040; --hi: #e07090; --card: #241418;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, sans-serif;
}

.wrap {
  max-width: 520px;
  margin: 0 auto;
  padding: 16px 16px calc(24px + env(safe-area-inset-bottom));
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.header-actions { display: flex; gap: 8px; flex-shrink: 0; }

.kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 4px 0 0;
  font-size: 22px;
  font-weight: 650;
}

.card {
  background: var(--card);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 12px;
}

.card-title { margin: 0 0 10px; font-weight: 700; }
.field { display: grid; gap: 6px; margin-bottom: 10px; font-size: 13px; color: var(--muted); }
select, input[type="text"], #join-code {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
.flags { border: 0; padding: 0; margin: 0 0 12px; display: grid; gap: 8px; }
.flags legend { padding: 0; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.flags label { display: flex; gap: 8px; align-items: center; font-size: 15px; }
.row-form { display: flex; gap: 8px; }
.row-form input { flex: 1; }

.btn, #invite, #to-lobby, #resign, #draw, .promo button {
  border: 0;
  border-radius: 999px;
  padding: 8px 14px;
  background: var(--hi);
  color: #1a1410;
  font-weight: 700;
  font: inherit;
  cursor: pointer;
}
.btn.ghost, #to-lobby, #resign, #draw {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--muted);
}
#invite { background: var(--hi); color: #1a1410; font-weight: 700; }

.clocks { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.clock {
  background: var(--card);
  border-radius: 12px;
  padding: 8px 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-variant-numeric: tabular-nums;
}
.clock.on { outline: 2px solid var(--hi); }
.clock.flag { color: var(--danger); }

.promo {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  margin-bottom: 8px; font-size: 13px; color: var(--muted);
}

.board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  user-select: none;
}

.sq {
  display: grid;
  place-items: center;
  font-size: clamp(22px, 8vw, 42px);
  line-height: 1;
  cursor: pointer;
  border: 0;
  font-family: inherit;
}
html[data-pieces="letters"] .sq { font-size: clamp(16px, 5vw, 26px); font-weight: 700; }

.sq.light { background: var(--light); color: #2b1b12; }
.sq.dark { background: var(--dark); color: #f7efe2; }
.sq.mark { outline: 3px solid var(--hi); outline-offset: -3px; }
.sq.legal::after {
  content: "";
  width: 28%;
  height: 28%;
  border-radius: 50%;
  background: var(--ok);
  opacity: 0.75;
}
.sq.last { box-shadow: inset 0 0 0 4px rgba(212, 160, 23, 0.55); }
.sq.check { box-shadow: inset 0 0 0 4px #c23; }

.players, .rules-line {
  margin: 12px 0 0;
  color: var(--muted);
  min-height: 1.4em;
  font-size: 14px;
}
.actions { display: flex; gap: 8px; margin-top: 12px; }