/* ============================================================
   Kotoba — a Japanese kana Wordle
   ============================================================ */
:root {
  --bg: #f6f0e6;
  --panel: #fffdf8;
  --ink: #23201c;
  --muted: #6f6456;
  --line: #e2d8c6;
  --accent: #b3402f;          /* hinomaru red — brand/text */
  --accent-btn: #b3402f;      /* red used as a button fill (needs 4.5:1 vs white) */
  --accent-soft: #f0d9d2;

  --correct: #358050;         /* green — right kana, right place (white text) */
  --present: #e6ad2b;         /* amber — kana elsewhere (DARK text; amber is bright) */
  --tile-ink-present: #23201c;
  --absent:  #7c7362;         /* grey — kana not in word (white text) */
  --tile-empty: #fffdf8;
  --tile-border: #d8cdb8;
  --tile-filled-border: #b7a98c;

  --hint: #6d4bd0;            /* purple — gojūon axis hint */
  --key: #ece3d2;
  --key-ink: #2a2620;

  --shadow: 0 1px 0 rgba(0,0,0,.08), 0 8px 24px -18px rgba(0,0,0,.5);
  font-synthesis-weight: none;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16130f;
    --panel: #201b15;
    --ink: #f2ead9;
    --muted: #a89d89;
    --line: #322a20;
    --accent: #e0705f;         /* lighter red for text/brand on the dark bg */
    --accent-btn: #b8483a;     /* darker red for button fills (4.5:1 vs white) */
    --accent-soft: #3a231e;
    --correct: #358050;
    --present: #e6ad2b;
    --absent: #4a4235;
    --tile-empty: #1c1812;
    --tile-border: #3a3125;
    --tile-filled-border: #5a4e3b;
    --hint: #6d4bd0;
    --key: #322a1f;
    --key-ink: #eadfca;
    --shadow: 0 1px 0 rgba(0,0,0,.3), 0 10px 30px -18px #000;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}
button { font-family: inherit; cursor: pointer; }
.jp { font-family: 'Zen Maru Gothic', 'Zen Maru Gothic', sans-serif; }

#root { min-height: 100%; }

.app {
  max-width: 500px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 0 10px calc(10px + env(safe-area-inset-bottom));
}

/* ---- header ---- */
header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 4px 10px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: baseline; gap: 10px; flex: 1; min-width: 0; }
.brand h1 {
  font-family: 'Zen Maru Gothic', sans-serif;
  font-weight: 900;
  font-size: 26px;
  margin: 0;
  letter-spacing: .01em;
  color: var(--accent);
  line-height: 1;
}
.brand .en { color: var(--muted); font-size: 12.5px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.iconbtn {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  width: 38px; height: 38px;
  border-radius: 10px;
  font-size: 17px;
  display: grid; place-items: center;
  transition: background .12s, transform .08s;
}
.iconbtn:active { transform: scale(.94); }
.iconbtn:hover { background: var(--accent-soft); }

/* ---- mode row ---- */
.modes {
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap;
  padding: 8px 2px 4px;
}
.seg {
  display: inline-flex; background: var(--panel);
  border: 1px solid var(--line); border-radius: 999px; padding: 3px;
}
.seg button {
  border: 0; background: transparent; color: var(--muted);
  padding: 6px 11px; border-radius: 999px; font-weight: 600; font-size: 12.5px;
  display: inline-flex; align-items: center;
}
.seg button.on { background: var(--accent-btn); color: #fff; }
.spacer { flex: 1; }
.lenpick {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--muted); font-size: 12px; font-weight: 600;
}
.lenpick select {
  font-family: inherit; font-size: 13px; font-weight: 600;
  color: var(--ink); background: var(--panel);
  border: 1px solid var(--line); border-radius: 8px; padding: 4px 6px;
}

/* ---- board ---- */
.board-wrap { flex: 1; display: grid; place-items: center; padding: 10px 0; }
.board { display: grid; gap: 6px; }
.row { display: grid; gap: 6px; grid-auto-flow: column; justify-content: center; }
.tile {
  position: relative;
  width: 56px; height: 56px;
  max-width: 15.5vw; max-height: 15.5vw;
  border: 2px solid var(--tile-border);
  background: var(--tile-empty);
  border-radius: 10px;
  display: grid; place-items: center;
  font-family: 'Zen Maru Gothic', sans-serif;
  font-weight: 700;
  font-size: 28px;
  color: var(--ink);
  user-select: none;
  transition: transform .1s;
}
.tile .romaji {
  position: absolute; bottom: 3px; left: 0; right: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; font-weight: 600; color: var(--muted);
  text-align: center; letter-spacing: -.02em;
  pointer-events: none;
}
.tile.filled { border-color: var(--tile-filled-border); }
.tile.filled.pop { animation: pop .12s ease; }
@keyframes pop { 0% { transform: scale(1); } 50% { transform: scale(1.08); } 100% { transform: scale(1); } }

.tile.correct, .tile.present, .tile.absent { color: #fff; border-color: transparent; }
.tile.correct { background: var(--correct); }
.tile.present { background: var(--present); color: var(--tile-ink-present); }
.tile.absent  { background: var(--absent); }
.tile.correct .romaji, .tile.absent .romaji { color: rgba(255,255,255,.9); }
.tile.present .romaji { color: rgba(35,32,28,.9); }
.tile.reveal { animation: flip .5s ease both; }
@keyframes flip {
  0% { transform: rotateX(0); }
  45% { transform: rotateX(90deg); }
  100% { transform: rotateX(0); }
}
.row.bad { animation: shake .4s; }
@keyframes shake {
  10%,90% { transform: translateX(-2px); }
  20%,80% { transform: translateX(4px); }
  30%,50%,70% { transform: translateX(-7px); }
  40%,60% { transform: translateX(7px); }
}

/* gojūon two-axis hint pips (consonant row / vowel column) */
.pips { position: absolute; top: 3px; right: 4px; display: flex; gap: 3px; }
.pip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 8.5px; font-weight: 700;
  width: 11px; height: 11px; border-radius: 3px;
  display: grid; place-items: center;
  background: rgba(0,0,0,.14); color: rgba(255,255,255,.55);
}
.tile:not(.correct):not(.present):not(.absent) .pip { background: var(--line); color: var(--muted); }
.pip.hit { background: var(--hint); color: #fff; }

/* ---- keyboard ---- */
.kb { padding: 4px 0 2px; }
.kb .pending {
  text-align: center; height: 16px; margin-bottom: 4px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  color: var(--accent); font-weight: 600; letter-spacing: .04em;
}
.kb-grid { display: grid; grid-auto-flow: row; gap: 4px; }
.kb-row { display: grid; gap: 4px; grid-auto-flow: column; justify-content: center; }
.key {
  border: 0; border-radius: 7px;
  background: var(--key); color: var(--key-ink);
  font-family: 'Zen Maru Gothic', sans-serif; font-weight: 700;
  height: 34px; min-width: 26px; font-size: 15px;
  display: grid; place-items: center;
  transition: transform .06s, filter .1s;
}
.key:active { transform: translateY(1px); }
.key.blank { background: transparent; pointer-events: none; }
.key.correct { background: var(--correct); color: #fff; }
.key.present { background: var(--present); color: var(--tile-ink-present); }
.key.absent  { background: var(--absent); color: rgba(255,255,255,.92); }
.kb-section-label {
  text-align: center; color: var(--muted);
  font-size: 10px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; margin: 8px 0 3px;
}
.dakuten-grid { opacity: .96; }
.kb-actions { display: flex; gap: 6px; margin-top: 8px; }
.key.wide {
  flex: 1; height: 42px; min-width: 0; font-size: 13px;
  font-family: 'Inter', sans-serif; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase;
}
.kb-actions { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 6px; }
.key.enter { background: var(--accent-btn); color: #fff; }
.key.del { background: var(--panel); border: 1px solid var(--line); color: var(--ink); }
.key.small-toggle.on { outline: 2px solid var(--accent); }
.key.mod { background: var(--panel); border: 1px solid var(--line); color: var(--accent); font-weight: 900; }
.key.mod.on { background: var(--accent-btn); color: #fff; border-color: var(--accent-btn); }

/* ---- toast ---- */
.toast-wrap {
  position: fixed; top: 64px; left: 0; right: 0;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  pointer-events: none; z-index: 40;
}
.toast {
  background: var(--ink); color: var(--bg);
  padding: 9px 16px; border-radius: 10px;
  font-weight: 600; font-size: 14px; box-shadow: var(--shadow);
  animation: toastin .2s ease;
}
@keyframes toastin { from { opacity: 0; transform: translateY(-8px); } }

/* ---- modal ---- */
.scrim {
  position: fixed; inset: 0; background: rgba(20,16,10,.55);
  display: grid; place-items: center; padding: 16px; z-index: 50;
  animation: fade .15s ease;
}
@keyframes fade { from { opacity: 0; } }
.modal {
  background: var(--panel); color: var(--ink);
  width: 100%; max-width: 420px; max-height: 88dvh; overflow: auto;
  border-radius: 18px; padding: 20px; box-shadow: var(--shadow);
  border: 1px solid var(--line);
  animation: rise .2s ease;
}
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }
.modal h2 { margin: 0 0 4px; font-family: 'Zen Maru Gothic', sans-serif; font-size: 22px; }
.modal h2.jp { color: var(--accent); }
.modal p { color: var(--muted); line-height: 1.55; font-size: 14.5px; }
.modal .close { position: sticky; top: -2px; float: right; }
.legend { display: grid; gap: 10px; margin: 14px 0; }
.legend-row { display: flex; align-items: center; gap: 12px; }
.legend .tile { width: 40px; height: 40px; font-size: 20px; flex: none; }
.legend .txt { font-size: 13.5px; color: var(--ink); line-height: 1.4; }
.legend .txt b { color: var(--accent); }

.result { text-align: center; }
.result .rlabel { color: var(--muted); font-weight: 600; font-size: 13px; text-align: center; }
.result .word {
  font-family: 'Zen Maru Gothic', sans-serif; font-weight: 900;
  font-size: 40px; color: var(--accent); margin: 6px 0 0; cursor: pointer; line-height: 1.05;
}
.result .word .spk { font-size: 18px; margin-left: 8px; vertical-align: middle; opacity: .7; }
.result .kanji {
  text-align: center; font-family: 'Zen Maru Gothic', sans-serif;
  font-size: 24px; font-weight: 700; color: var(--ink); margin: 2px 0;
}
.result .rom {
  font-family: 'JetBrains Mono', monospace; color: var(--muted); font-size: 15px;
  display: flex; gap: 8px; align-items: center; justify-content: center; flex-wrap: wrap;
}
.result .pos, .result .lvlchip {
  font-family: 'Inter', sans-serif; font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; padding: 2px 7px; border-radius: 999px;
}
.result .pos { background: var(--accent-soft); color: var(--accent); }
.result .lvlchip { background: var(--line); color: var(--muted); }
.result .mean { font-size: 18px; font-weight: 600; margin: 8px 0 2px; text-align: center; }
.example {
  display: flex; gap: 10px; align-items: flex-start; justify-content: flex-start;
  margin: 14px 0 2px; padding: 12px; background: var(--bg); border-radius: 12px; text-align: left;
}
.example .jp { font-size: 16px; line-height: 1.5; color: var(--ink); }
.example .exen { font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.spkbtn {
  border: 0; background: var(--accent-soft); color: var(--accent);
  width: 30px; height: 30px; border-radius: 50%; font-size: 14px; flex: none;
  display: grid; place-items: center;
}
.stats { display: flex; justify-content: center; gap: 22px; margin: 16px 0 6px; }
.stat b { display: block; font-size: 26px; font-family: 'Zen Maru Gothic', sans-serif; }
.stat span { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.dist { display: grid; gap: 4px; margin: 12px 0; text-align: left; }
.dist-row { display: flex; align-items: center; gap: 8px; font-size: 12px; }
.dist-row .n { width: 12px; color: var(--muted); font-weight: 700; }
.dist-row .bar {
  background: var(--absent); color: #fff; border-radius: 4px;
  padding: 2px 7px; font-weight: 700; min-width: 22px; text-align: right;
  font-family: 'JetBrains Mono', monospace;
}
.dist-row .bar.hi { background: var(--correct); }
.bigbtn {
  border: 0; background: var(--accent-btn); color: #fff;
  padding: 12px 20px; border-radius: 12px; font-weight: 700; font-size: 15px;
  width: 100%; margin-top: 6px;
}
.rowtoggle { display: flex; align-items: center; justify-content: center; gap: 8px; color: var(--muted); font-size: 13px; margin-top: 10px; }
.switch { position: relative; width: 40px; height: 22px; }
.switch input { display: none; }
.switch .track { position: absolute; inset: 0; background: var(--line); border-radius: 999px; transition: background .15s; }
.switch .knob { position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: transform .15s; box-shadow: 0 1px 2px rgba(0,0,0,.3); }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track + .knob { transform: translateX(18px); }

footer { text-align: center; color: var(--muted); font-size: 11px; padding: 6px 0 2px; }
footer a { color: var(--muted); }

/* ============================================================ v2 additions */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Colour-blind palette — Okabe-Ito blue/orange. Higher specificity than the
   :root defaults (and the dark-mode @media :root), so it wins in both themes. */
:root[data-palette="cb"] {
  --correct: #0072b2;          /* blue (white text) */
  --present: #e69f00;          /* orange (dark text) */
  --tile-ink-present: #1a1300;
  --hint: #6d4bd0;
}

@media (prefers-reduced-motion: reduce) {
  .tile.reveal, .tile.pop, .row.bad, .toast, .scrim, .modal { animation: none !important; }
}

.badge {
  display: inline-grid; place-items: center; min-width: 16px; height: 16px;
  padding: 0 4px; margin-left: 5px; border-radius: 8px;
  background: var(--accent-btn); color: #fff; font-size: 10px; font-weight: 800; vertical-align: middle;
}
.seg button.on .badge { background: rgba(255,255,255,.3); }

.empty-review { text-align: center; max-width: 300px; padding: 20px; }
.empty-review .big { font-size: 44px; margin-bottom: 8px; }
.empty-review p { color: var(--muted); line-height: 1.5; font-size: 14px; margin: 8px 0 16px; }

.bigbtn.dark { background: var(--ink); color: var(--bg); }