/* stroke-order — shodō: sumi ink on washi, or light ink on indigo paper. */

@font-face {
  font-family: "SO Serif JP";
  src: url("serif-jp.5ea501b7ed.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "SO Sans";
  src: url("sans-latin.0bf49ffd59.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

/* Washi (light). Every text colour here is checked for WCAG AA by e2e/contrast.test.mjs. */
:root {
  --desk: #e4dccb;
  --paper: #f6f1e6;
  --text: #1d1a16;
  --muted: #5b5247;
  --line: rgba(29, 26, 22, 0.18);
  --line-strong: rgba(29, 26, 22, 0.42);
  --shu: #a3301c;
  --primary-bg: #a3301c;
  --primary-fg: #fbf5ea;
  --focus: #a3301c;
  --caption: #a3301c;
  --shadow: rgba(70, 50, 25, 0.3);
  --shadow-near: rgba(70, 50, 25, 0.22);
  --seal-blend: multiply;
  --serif: "SO Serif JP", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "SO Sans", "Noto Sans", "Hiragino Sans", system-ui, sans-serif;
  color-scheme: light;
}

/* Indigo (dark): system preference, unless the washi paper was chosen explicitly. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="washi"]) {
    --desk: #0d1220;
    --paper: #19223b;
    --text: #ebe5d6;
    --muted: #aaa89c;
    --line: rgba(235, 229, 214, 0.16);
    --line-strong: rgba(235, 229, 214, 0.42);
    --shu: #ff9477;
    --primary-bg: #ff9477;
    --primary-fg: #1b1210;
    --focus: #ff9477;
    --caption: #ff9a7e;
    --shadow: rgba(0, 0, 0, 0.55);
    --shadow-near: rgba(0, 0, 0, 0.4);
    --seal-blend: normal;
    color-scheme: dark;
  }
}
:root[data-theme="indigo"] {
  --desk: #0d1220;
  --paper: #19223b;
  --text: #ebe5d6;
  --muted: #aaa89c;
  --line: rgba(235, 229, 214, 0.16);
  --line-strong: rgba(235, 229, 214, 0.42);
  --shu: #ff9477;
  --primary-bg: #ff9477;
  --primary-fg: #1b1210;
  --focus: #ff9477;
  --caption: #ff9a7e;
  --shadow: rgba(0, 0, 0, 0.55);
  --shadow-near: rgba(0, 0, 0, 0.4);
  --seal-blend: normal;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--desk);
  color: var(--text);
  font: 400 1rem/1.55 var(--sans);
  overflow-x: hidden;
}

a { color: var(--shu); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

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

[lang="ja"] { font-family: var(--serif); font-weight: 500; }

/* ---------- layout ---------- */

.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 16px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas: "masthead" "specimen" "guidance" "stage" "controls" "picker" "colophon";
  gap: 14px;
}
.masthead { grid-area: masthead; }
.specimen { grid-area: specimen; }
.guidance { grid-area: guidance; }
.stage { grid-area: stage; min-width: 0; }
.controls { grid-area: controls; }
.picker { grid-area: picker; }
.colophon { grid-area: colophon; }

@media (min-width: 900px) {
  .app {
    grid-template-columns: minmax(0, 1fr) 356px;
    grid-template-areas:
      "stage masthead"
      "stage specimen"
      "stage guidance"
      "stage controls"
      "stage picker"
      "stage colophon";
    grid-template-rows: auto auto auto auto 1fr auto;
    column-gap: 56px;
    row-gap: 18px;
    padding-top: 28px;
    align-items: start;
  }
  .stage { position: sticky; top: 24px; display: flex; flex-direction: column; align-items: center; }
}

/* ---------- masthead ---------- */

.wordmark {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-weight: 500;
  font-size: 1rem;
}
.wordmark-jp { font-size: 1.7rem; letter-spacing: 0.08em; }
.wordmark-en {
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 0.88rem; max-width: 46ch; }

/* ---------- specimen ---------- */

.specimen {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.glyph {
  margin: 0;
  font-size: 3.9rem;
  line-height: 1;
  min-width: 1.1em;
  text-align: center;
}
.facts { min-width: 0; flex: 1; }
.next { align-self: center; white-space: nowrap; }
.next [lang="ja"] { font-size: 1.15rem; margin-left: 4px; }
.meaning { margin: 0 0 4px; font-size: 1.2rem; font-weight: 600; }
.readings { margin: 0; display: flex; flex-wrap: wrap; gap: 2px 16px; }
.readings div { display: flex; gap: 6px; align-items: baseline; min-width: 0; }
.readings dt { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.readings dd { margin: 0; font-size: 1.02rem; overflow-wrap: anywhere; }
.count { margin: 4px 0 0; color: var(--muted); font-size: 0.88rem; }

@media (min-width: 900px) {
  .glyph { font-size: 6rem; }
  .tagline { max-width: 34ch; font-size: 0.92rem; }
}

/* ---------- progress + feedback ---------- */

.progress {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.progress li {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line-strong);
}
.progress li.done { background: var(--text); color: var(--desk); border-color: var(--text); }
.progress li.next { border: 2px solid var(--shu); color: var(--shu); }

.feedback {
  margin: 0;
  min-height: 2.6em;
  font-size: 1.02rem;
  padding-left: 12px;
  border-left: 3px solid var(--line-strong);
}
.feedback.good { border-left-color: var(--text); }
.feedback.miss { border-left-color: var(--shu); }
.feedback.done { border-left-color: var(--shu); font-weight: 600; }
@media (min-width: 900px) { .feedback { min-height: 3.1em; } }

/* ---------- the sheet ---------- */

.sheet {
  position: relative;
  width: min(100%, calc((100vh - 56px) / 1.16), 700px);
  aspect-ratio: 1 / 1.16;
  margin: 0 auto;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  cursor: crosshair;
}
.layer { position: absolute; inset: 0; width: 100%; height: 100%; }
.paper { filter: drop-shadow(0 14px 22px var(--shadow)) drop-shadow(0 1px 1px var(--shadow-near)); }
.wet { transition: opacity 0.7s ease; }
.wet.fading { opacity: 0; }

.seal {
  position: absolute;
  left: 7%;
  top: 84.3%;
  width: 13%;
  aspect-ratio: 1;
  opacity: 0;
  transform: rotate(-3deg);
  mix-blend-mode: var(--seal-blend);
  pointer-events: none;
}
.seal.stamped { opacity: 1; animation: stamp 0.46s cubic-bezier(0.2, 0.9, 0.25, 1.15) both; }
@keyframes stamp {
  0% { opacity: 0; transform: scale(1.4) rotate(-8deg); }
  55% { opacity: 1; transform: scale(0.95) rotate(-3deg); }
  100% { opacity: 1; transform: scale(1) rotate(-3deg); }
}

.sheet-caption {
  position: absolute;
  right: 7%;
  top: 86.5%;
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--caption);
  font-size: clamp(0.68rem, 1.9vw, 0.86rem);
  letter-spacing: 0.04em;
  pointer-events: none;
}
.sheet-caption [lang="ja"] { font-size: 1.5em; }

.pen-note { margin: 10px auto 0; max-width: 60ch; color: var(--muted); font-size: 0.85rem; text-align: center; }

/* Controls fade while the brush is on the paper, and return when it lifts. */
.fade-while-inking { transition: opacity 0.2s ease; }
body.inking .fade-while-inking { opacity: 0; pointer-events: none; }

/* ---------- controls ---------- */

.controls { display: grid; gap: 10px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

button {
  font: 500 0.92rem/1.2 var(--sans);
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 9px 13px;
  min-height: 40px;
  cursor: pointer;
}
button:hover { border-color: var(--text); }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--primary-bg); color: var(--primary-fg); border-color: var(--primary-bg); font-weight: 600; }
button.primary:hover { filter: brightness(1.08); }

.toggle { display: inline-flex; align-items: center; gap: 8px; }
.toggle::before {
  content: "";
  width: 11px;
  height: 11px;
  border: 1.5px solid var(--line-strong);
  border-radius: 1px;
}
.toggle[aria-pressed="true"]::before { background: var(--shu); border-color: var(--shu); }

.share-note { color: var(--muted); font-size: 0.86rem; }

/* ---------- picker ---------- */

.picker h2 {
  margin: 6px 0 8px;
  font: 600 0.8rem/1.4 var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.picker-sub { letter-spacing: 0.02em; text-transform: none; font-weight: 400; color: var(--muted); margin-left: 6px; }
.search-label { display: block; font-size: 0.86rem; color: var(--muted); margin-bottom: 4px; }
.search {
  width: 100%;
  font: 400 1rem var(--sans);
  color: var(--text);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 9px 11px;
}
.search::placeholder { color: var(--muted); opacity: 1; }
.search-status { margin: 6px 0; min-height: 1.4em; font-size: 0.86rem; color: var(--muted); }

.group { margin: 10px 0 14px; }
.group h3 {
  margin: 0 0 6px;
  font: 600 0.86rem/1.3 var(--sans);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.group h3 [lang="ja"] { color: var(--muted); font-size: 0.9rem; }
.chars {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
}
.char {
  position: relative;
  aspect-ratio: 1;
  padding: 0;
  min-height: 0;
  font: 500 1.45rem/1 var(--serif);
  border-color: var(--line);
}
.char[aria-current="true"] { border: 2px solid var(--shu); background: var(--paper); }
.char.written::after {
  content: "";
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  background: var(--shu);
  border-radius: 1px;
}

/* ---------- colophon ---------- */

.colophon { font-size: 0.82rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 10px; }
.colophon p { margin: 0 0 6px; }

.noscript { max-width: 40ch; margin: 40px auto; text-align: center; }

@media (prefers-reduced-motion: reduce) {
  .fade-while-inking, .wet { transition: none; }
  .seal.stamped { animation: none; }
}