/* Word Relay - original visual design.
   Warm paper in light, deep slate in dark, teal/amber feedback colors, and a
   blue/orange alternate palette for color-blind players. Every text color here
   clears 4.5:1 against the surface it sits on. */

:root {
  color-scheme: light dark;

  --paper: #fbfaf7;
  --card: #ffffff;
  --sunk: #f1efe9;
  --line: #dcd7cc;
  --ink: #1b1d22;
  --ink-soft: #4d5360;
  --accent: #0f5f74;
  --accent-ink: #ffffff;
  --focus: #0f5f74;

  /* Feedback colors. All three carry white text. */
  --ok: #177f6d;
  --near: #9a6100;
  --off: #5b6472;
  --tile-ink: #ffffff;

  --radius: 10px;
  --wrap: 46rem;
  --flip: 250ms;   /* one tile's flip; rows stagger by this per letter */
}

:root[data-palette="cvd"] {
  --ok: #1b5fa8;
  --near: #b05a00;
  --off: #55504a;
}

:root[data-theme="dark"] {
  --paper: #14161b;
  --card: #1c1f26;
  --sunk: #23272f;
  --line: #333945;
  --ink: #eceef2;
  --ink-soft: #b3bac6;
  --accent: #4fc3d9;
  --accent-ink: #0c1216;
  --focus: #7dd8ea;
  --ok: #1f9a83;
  --near: #b87700;
  --off: #6b7480;
}

:root[data-theme="dark"][data-palette="cvd"] {
  --ok: #2f7ecb;
  --near: #cc6a00;
  --off: #6d675f;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #14161b;
    --card: #1c1f26;
    --sunk: #23272f;
    --line: #333945;
    --ink: #eceef2;
    --ink-soft: #b3bac6;
    --accent: #4fc3d9;
    --accent-ink: #0c1216;
    --focus: #7dd8ea;
    --ok: #1f9a83;
    --near: #b87700;
    --off: #6b7480;
  }
  :root:not([data-theme="light"])[data-palette="cvd"] {
    --ok: #2f7ecb;
    --near: #cc6a00;
    --off: #6d675f;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 ui-sans-serif, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  letter-spacing: 0.005em;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--accent); color: var(--accent-ink);
  padding: 10px 16px; border-radius: var(--radius); font-weight: 600;
  transition: top 120ms ease;
}
.skip-link:focus { top: 12px; }

a { color: var(--accent); text-underline-offset: 3px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

kbd {
  font: 600 0.85em/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--sunk); border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 5px; padding: 2px 6px; color: var(--ink);
  white-space: nowrap;
}

/* ---------------------------------------------------------------- header */

.site-head { border-bottom: 1px solid var(--line); background: var(--card); }
.head-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 60px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.05rem; display: flex; align-items: center; gap: 9px; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--ok); color: var(--tile-ink);
  font-size: 0.72rem; font-weight: 800; letter-spacing: 0.04em;
}
.site-head nav { display: flex; gap: 18px; font-size: 0.95rem; }

/* ------------------------------------------------------------------ hero */

.hero { padding: 34px 20px 10px; }
h1 {
  font-size: clamp(2.1rem, 7vw, 3rem);
  line-height: 1.1; margin: 0 0 14px; letter-spacing: -0.02em;
}
.lede { margin: 0; color: var(--ink-soft); max-width: 40rem; }

/* ------------------------------------------------------------------ play */

/* A fixed floor under the play area so swapping the start screen for the
   board never moves the sections beneath it. */
.play { padding: 22px 20px 30px; min-height: 620px; }

.start {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px;
}
.start-title { margin: 0 0 4px; font-size: 1.25rem; }
.start-sub { margin: 0 0 16px; color: var(--ink-soft); font-size: 0.94rem; }

.tiers { border: 0; margin: 0; padding: 0; display: grid; gap: 8px; }

.tier {
  display: flex; gap: 12px; align-items: flex-start;
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; cursor: pointer; background: var(--paper);
}
.tier:hover { border-color: var(--accent); }
.tier:has(input:checked) {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
  background: var(--sunk);
}
.tier:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }
.tier input { margin: 5px 0 0; width: 18px; height: 18px; accent-color: var(--accent); flex: none; }
.tier-body { display: block; }
.tier-name { display: block; font-weight: 700; margin-bottom: 2px; }
.tier-note { display: block; color: var(--ink-soft); font-size: 0.92rem; line-height: 1.5; }
.tier-flag {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--accent); color: var(--accent-ink);
  padding: 2px 7px; border-radius: 999px; margin-left: 7px; vertical-align: 2px;
}

.start-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.start-status { margin: 12px 0 0; min-height: 1.5em; color: var(--ink-soft); font-size: 0.92rem; }

.btn {
  font: inherit; font-weight: 600; font-size: 0.97rem;
  padding: 11px 18px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-quiet { background: transparent; }
.btn[disabled] { opacity: 0.5; cursor: default; }

/* ------------------------------------------------------------------ game */

.game-bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 10px; min-height: 44px;
}
.mode-line { margin: 0; font-size: 0.94rem; color: var(--ink-soft); }
.mode-line strong { color: var(--ink); }
.game-bar-actions { display: flex; align-items: center; gap: 10px; }

.timer {
  font: 700 1rem/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 8px 12px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--sunk);
  min-width: 62px; text-align: center;
}
.timer[data-low="1"] { background: var(--near); color: var(--tile-ink); border-color: var(--near); }

.board {
  display: grid; gap: 6px; justify-content: center;
  margin: 0 auto 14px; width: fit-content;
}
.board-row { display: grid; grid-template-columns: repeat(var(--cols), var(--tile)); gap: 6px; }

.tile {
  --tile: clamp(38px, min(12vw, 9vh), 60px);
  width: var(--tile); height: var(--tile);
  display: grid; place-items: center;
  font-size: calc(var(--tile) * 0.46); font-weight: 700; text-transform: uppercase;
  border: 2px solid var(--line); border-radius: 8px;
  background: transparent; color: var(--ink);
  user-select: none;
}
.tile[data-filled="1"] { border-color: var(--ink-soft); }
.tile[data-locked="1"] { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 14%, transparent); }
.tile[data-state="exact"]   { background: var(--ok);   border-color: var(--ok);   color: var(--tile-ink); }
.tile[data-state="present"] { background: var(--near); border-color: var(--near); color: var(--tile-ink); }
.tile[data-state="absent"]  { background: var(--off);  border-color: var(--off);  color: var(--tile-ink); }
.tile[data-state="burned"]  {
  background: repeating-linear-gradient(135deg, var(--off) 0 7px, color-mix(in srgb, var(--off) 70%, black) 7px 14px);
  border-color: var(--off); color: var(--tile-ink);
}

.say {
  margin: 0 auto 12px; min-height: 1.6em; text-align: center;
  font-size: 0.95rem; font-weight: 600; color: var(--ink);
}

/* -------------------------------------------------------------- keyboard */

.keyboard { display: grid; gap: 7px; max-width: 520px; margin: 0 auto; }
.kb-row { display: flex; gap: 5px; justify-content: center; }
.key {
  font: inherit; font-weight: 700; font-size: 0.95rem;
  flex: 1 1 auto; min-width: 0; height: 52px;
  border: 1px solid var(--line); border-radius: 7px;
  background: var(--sunk); color: var(--ink);
  cursor: pointer; text-transform: uppercase;
  padding: 0 2px;
}
.key.wide { flex: 1.6 1 auto; font-size: 0.76rem; letter-spacing: 0.03em; }
.key:hover { border-color: var(--accent); }
.key[data-state="exact"]   { background: var(--ok);   border-color: var(--ok);   color: var(--tile-ink); }
.key[data-state="present"] { background: var(--near); border-color: var(--near); color: var(--tile-ink); }
.key[data-state="absent"]  { background: var(--off);  border-color: var(--off);  color: var(--tile-ink); }
.key[data-used="1"]        { opacity: 0.42; }

/* ------------------------------------------------------------- animation */

@keyframes wr-flip {
  0%   { transform: rotateX(0deg); }
  49%  { transform: rotateX(90deg); }
  50%  { transform: rotateX(90deg); }
  100% { transform: rotateX(0deg); }
}
@keyframes wr-shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-7px); }
  30% { transform: translateX(6px); }
  45% { transform: translateX(-5px); }
  60% { transform: translateX(4px); }
  75% { transform: translateX(-2px); }
}
@keyframes wr-bounce {
  0%   { transform: translateY(0); }
  35%  { transform: translateY(-16px); }
  60%  { transform: translateY(4px); }
  80%  { transform: translateY(-4px); }
  100% { transform: translateY(0); }
}
@keyframes wr-pop {
  0%   { transform: scale(1); }
  55%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.tile.flip { animation: wr-flip var(--flip) ease-in-out both; }
.tile.pop { animation: wr-pop 110ms ease-out; }
.board-row.shake { animation: wr-shake 460ms ease-in-out; }
.tile.bounce { animation: wr-bounce 560ms ease-in-out both; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ----------------------------------------------------------------- prose */

.prose { padding: 26px 20px; }
.prose h2 { font-size: 1.5rem; margin: 0 0 12px; letter-spacing: -0.01em; }
.prose h3 { font-size: 1.08rem; margin: 22px 0 6px; }
.prose p { margin: 0 0 12px; color: var(--ink-soft); }
.prose ol, .prose ul { margin: 0 0 12px; padding-left: 1.35em; color: var(--ink-soft); }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--ink); }
.tier-list { list-style: none; padding-left: 0; }
.tier-list li {
  border-left: 3px solid var(--ok); padding: 2px 0 2px 14px; margin-bottom: 12px;
}

/* ---------------------------------------------------------------- footer */

.site-foot {
  border-top: 1px solid var(--line); background: var(--card);
  margin-top: 24px; padding: 22px 0 34px; font-size: 0.92rem; color: var(--ink-soft);
}
.site-foot p { margin: 0 0 8px; }
.foot-links { display: flex; gap: 8px; flex-wrap: wrap; }

/* --------------------------------------------------------------- dialogs */

.sheet {
  border: 1px solid var(--line); border-radius: 14px; padding: 0;
  background: var(--card); color: var(--ink);
  width: min(460px, calc(100vw - 32px)); max-height: 88vh;
}
.sheet::backdrop { background: rgba(12, 14, 18, 0.55); }
.sheet-inner { padding: 20px; overflow: auto; max-height: 88vh; }
.sheet h2 { margin: 0 0 14px; font-size: 1.25rem; }
.sheet-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 18px; }

.menu-group { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin: 0 0 14px; }
.menu-group legend { font-weight: 700; padding: 0 6px; font-size: 0.92rem; }
.menu-hint { margin: 0 0 10px; font-size: 0.86rem; color: var(--ink-soft); }
.menu-tiers { display: grid; gap: 6px; }
.menu-tier {
  display: flex; gap: 10px; align-items: flex-start; cursor: pointer;
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper);
}
.menu-tier:has(input:checked) { border-color: var(--accent); background: var(--sunk); }
.menu-tier input { margin: 4px 0 0; accent-color: var(--accent); flex: none; }
.menu-tier b { display: block; font-size: 0.95rem; color: var(--ink); }
.menu-tier-body { display: block; }
.menu-tier span { display: block; font-size: 0.83rem; color: var(--ink-soft); line-height: 1.45; }

.switch { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; cursor: pointer; font-size: 0.92rem; }
.switch input { margin: 4px 0 0; width: 17px; height: 17px; accent-color: var(--accent); flex: none; }
.switch input[disabled] + span { opacity: 0.55; }

.stats-result { margin: 0 0 6px; font-weight: 700; font-size: 1.05rem; }
.stats-scope { margin: 0 0 14px; font-size: 0.88rem; color: var(--ink-soft); }
.stats-numbers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 0 0 16px; }
.stats-numbers div { text-align: center; background: var(--sunk); border-radius: 8px; padding: 9px 4px; }
.stats-numbers dt { font-size: 0.7rem; color: var(--ink-soft); line-height: 1.3; }
.stats-numbers dd { margin: 3px 0 0; font-size: 1.3rem; font-weight: 700; }
.stats-sub { margin: 0 0 8px; font-size: 0.95rem; }
.stats-practice { margin: 12px 0 0; font-size: 0.86rem; color: var(--ink-soft); }

.chart { display: grid; gap: 4px; }
.chart-row { display: grid; grid-template-columns: 1.6em 1fr; gap: 8px; align-items: center; font-size: 0.85rem; }
.chart-bar {
  background: var(--off); color: var(--tile-ink);
  border-radius: 4px; padding: 2px 7px; text-align: right;
  min-width: 2em; font-weight: 700; font-size: 0.8rem;
}
.chart-row[data-here="1"] .chart-bar { background: var(--ok); }

.share-status { margin: 10px 0 0; min-height: 1.4em; font-size: 0.88rem; color: var(--ink-soft); }

@media (max-width: 480px) {
  body { font-size: 16px; }
  .stats-numbers { grid-template-columns: repeat(2, 1fr); }
  .key { height: 48px; font-size: 0.9rem; }
}