/* Kanji Desk. Light and dark follow the system unless Settings picks one.
   Item types: radical green, kanji vermilion, vocabulary blue, each always shown with its name too. */
:root {
  --bg: #f4f2ec;
  --panel: #ffffff;
  --panel-2: #ece9e1;
  --line: #dcd8cd;
  --fg: #1c1b18;
  --muted: #6a665c;
  --accent: #5f3dc4;
  --accent-ink: #ffffff;
  --good: #1f7a3f;
  --good-bg: #dff2e5;
  --bad: #b8322a;
  --bad-bg: #fbe4e1;
  --warn-bg: #fff3c9;
  --rad: #2b8a3e;
  --kan: #d9480f;
  --voc: #1971c2;
  --reading-bg: #26252a;
  --reading-fg: #f4f2ec;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
  --radius: 14px;
  --jp: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Noto Sans CJK JP", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  --ui: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    --bg: #131417;
    --panel: #1c1d22;
    --panel-2: #25272e;
    --line: #33363e;
    --fg: #ecebe6;
    --muted: #9b998f;
    --accent: #9775fa;
    --accent-ink: #120d24;
    --good: #63d08f;
    --good-bg: #183424;
    --bad: #ff8a80;
    --bad-bg: #3a1d1b;
    --warn-bg: #3a3218;
    --rad: #2f9e44;
    --kan: #e8590c;
    --voc: #1c7ed6;
    --reading-bg: #ecebe6;
    --reading-fg: #131417;
    --shadow: none;
    color-scheme: dark;
  }
}
:root.dark {
  --bg: #131417;
  --panel: #1c1d22;
  --panel-2: #25272e;
  --line: #33363e;
  --fg: #ecebe6;
  --muted: #9b998f;
  --accent: #9775fa;
  --accent-ink: #120d24;
  --good: #63d08f;
  --good-bg: #183424;
  --bad: #ff8a80;
  --bad-bg: #3a1d1b;
  --warn-bg: #3a3218;
  --rad: #2f9e44;
  --kan: #e8590c;
  --voc: #1c7ed6;
  --reading-bg: #ecebe6;
  --reading-fg: #131417;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 var(--ui);
  -webkit-font-smoothing: antialiased;
}
[lang="ja"] { font-family: var(--jp); }
a { color: var(--accent); }
h1 { font-size: 1.5rem; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 1rem; margin: 0 0 0.5rem; }
h3 { font-size: 0.8rem; margin: 0 0 0.4rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
h4 { font-size: 0.85rem; margin: 0.6rem 0 0.2rem; color: var(--muted); }
p { margin: 0.3rem 0; }
kbd {
  font: 0.7rem var(--ui);
  border: 1px solid currentColor;
  border-radius: 4px;
  padding: 0 0.3em;
  opacity: 0.6;
  margin-left: 0.2em;
}
.wrap { max-width: 760px; margin: 0 auto; padding: max(12px, env(safe-area-inset-top)) 14px 40px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
.bad { color: var(--bad); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0.6rem 0; }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3em;
  font: 600 0.95rem var(--ui);
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55em 0.95em;
  cursor: pointer;
  text-decoration: none;
  min-height: 40px;
}
.btn:hover:not(:disabled) { border-color: var(--muted); }
.btn:disabled { opacity: 0.45; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.bad { color: var(--bad); }
.btn.small { font-size: 0.85rem; padding: 0.35em 0.7em; min-height: 34px; }
.btn.wide { width: 100%; }
.btn.on { background: var(--warn-bg); }
.link { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; text-decoration: underline; cursor: pointer; }
.icon {
  background: none;
  border: 0;
  color: var(--muted);
  font-size: 1.2rem;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
}
.icon:hover { background: var(--panel-2); color: var(--fg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* layout pieces */
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin: 4px 0 6px; }
.topnav { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin: 12px 0;
  box-shadow: var(--shadow);
}
details.card > summary { cursor: pointer; font-weight: 600; }
details.card[open] > summary { margin-bottom: 0.5rem; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.duo .card { margin: 6px 0 0; }
.big-card { display: flex; flex-direction: column; }
.big-card .btn { margin-top: auto; }
.hero { font-size: 3.4rem; font-weight: 700; line-height: 1.05; margin: 0.1rem 0; letter-spacing: -0.02em; }
.banner { background: var(--warn-bg); border-radius: 10px; padding: 8px 12px; margin: 8px 0; font-size: 0.9rem; }
.banner.bad { background: var(--bad-bg); color: var(--fg); }
.status { min-height: 1.3em; margin: 0 0 4px; }
.field { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin: 8px 0; }
.field .muted { flex-basis: 100%; }
select, input[type="number"] {
  font: inherit;
  color: var(--fg);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.35em 0.5em;
}
input[type="number"] { width: 6em; }
.tog { display: inline-flex; gap: 6px; align-items: center; cursor: pointer; }
.tog.block { display: flex; align-items: flex-start; margin: 10px 0; }
.tog input { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--accent); flex: none; }
.foot { margin-top: 24px; text-align: center; }
.spread { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 8px; }

/* level meter */
.meter { position: relative; height: 8px; background: var(--panel-2); border-radius: 4px; margin: 8px 0; overflow: visible; }
.meter span { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.meter i { position: absolute; top: -3px; bottom: -3px; width: 2px; background: var(--fg); opacity: 0.5; }

/* forecast: one bar per hour */
.fc { display: flex; align-items: flex-end; gap: 2px; height: 96px; padding-top: 18px; border-bottom: 1px solid var(--line); }
.fc-col { position: relative; flex: 1; height: 100%; display: flex; align-items: flex-end; justify-content: center; cursor: default; }
.fc-bar { width: 100%; max-width: 24px; background: var(--accent); border-radius: 4px 4px 0 0; }
.fc-val { position: absolute; left: 50%; transform: translate(-50%, -2px); font-size: 0.75rem; color: var(--fg); font-variant-numeric: tabular-nums; }
.fc-col:hover .fc-bar, .fc-col:focus .fc-bar { opacity: 0.75; }
.fc-col:hover::after, .fc-col:focus::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  background: var(--fg);
  color: var(--bg);
  font-size: 0.75rem;
  padding: 3px 7px;
  border-radius: 6px;
  z-index: 2;
  pointer-events: none;
}
.fc-col:first-child:hover::after, .fc-col:first-child:focus::after { left: 0; transform: none; }
.fc-col:last-child:hover::after, .fc-col:last-child:focus::after { left: auto; right: 0; transform: none; }
.fc-ticks { display: flex; gap: 2px; font-size: 0.7rem; color: var(--muted); }
.fc-ticks span { flex: 1; white-space: nowrap; overflow: visible; }
.fc-table { margin-top: 8px; font-size: 0.85rem; }
.fc-table summary { cursor: pointer; color: var(--muted); }
.fc-table table { border-collapse: collapse; margin-top: 6px; font-variant-numeric: tabular-nums; }
.fc-table td, .fc-table th { padding: 2px 12px 2px 0; text-align: left; }

/* setup */
.setup { max-width: 520px; margin: 8vh auto 0; }
.setup h1 { font-size: 2rem; }
.lede { font-size: 1.05rem; }
.steps { padding-left: 1.2em; }
.steps li { margin: 6px 0; }
.tokenform { display: flex; gap: 8px; margin: 14px 0 8px; }
.tokenform input, .search {
  flex: 1;
  min-width: 0;
  font: 1rem var(--ui);
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6em 0.8em;
}
.search { width: 100%; font-size: 1.1rem; margin: 10px 0; }
.err { color: var(--bad); }

/* session */
.sbar { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.slabel { font-weight: 700; }
.sprog { flex: 1; color: var(--muted); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.testflag { margin: 0 0 8px; font-size: 0.8rem; color: var(--muted); text-align: center; }
.qcard {
  position: relative;
  border-radius: var(--radius);
  min-height: 34vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  padding: 18px 12px;
  background: var(--muted);
}
.qcard.small { min-height: 0; padding: 22px 12px 10px; }
.qcard.t-rad { background: var(--rad); }
.qcard.t-kan { background: var(--kan); }
.qcard.t-voc { background: var(--voc); }
.qchars { font-family: var(--jp); font-size: clamp(64px, 20vw, 128px); line-height: 1.15; text-align: center; word-break: keep-all; }
.qchars[data-len="3"] { font-size: clamp(54px, 16vw, 112px); }
.qchars[data-len="4"] { font-size: clamp(46px, 13vw, 96px); }
.qchars[data-len="5"], .qchars[data-len="6"] { font-size: clamp(36px, 10vw, 80px); }
.qcard.small .qchars { font-size: 64px; }
.qcard .rad-img { width: 1em; height: 1em; filter: invert(1); }
.qtype { font-size: 0.85rem; opacity: 0.9; margin: 4px 0 0; }
.qprompt {
  text-align: center;
  padding: 10px;
  margin: 8px 0;
  border-radius: 10px;
  font-size: 1.05rem;
  background: var(--panel-2);
}
.qprompt.kind-reading { background: var(--reading-bg); color: var(--reading-fg); }
.qform { display: flex; gap: 8px; }
.qform input {
  flex: 1;
  min-width: 0;
  font: 1.5rem var(--ui);
  text-align: center;
  color: var(--fg);
  background: var(--panel);
  border: 2px solid var(--line);
  border-radius: 12px;
  padding: 0.45em 0.6em;
}
.qform input.ja { font-family: var(--jp); }
.qform input:focus { border-color: var(--accent); outline: none; }
.qform input.right { background: var(--good-bg); border-color: var(--good); }
.qform input.wrong { background: var(--bad-bg); border-color: var(--bad); }
.qgo { width: 56px; font-size: 1.3rem; border-radius: 12px; border: 2px solid var(--line); background: var(--panel); color: var(--fg); cursor: pointer; }
.shake { animation: shake 0.35s; }
@keyframes shake {
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}
@media (prefers-reduced-motion: reduce) { .shake { animation: none; outline: 2px solid var(--bad); } }
.qnote { min-height: 1.5em; text-align: center; margin: 6px 0; font-size: 0.95rem; }
.qacts { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.keys { text-align: center; margin-top: 14px; }
@media (hover: none) { .keys { display: none; } }
.toast {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.25s;
}
.toast.show { opacity: 1; }

/* lessons */
.ltabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; margin-bottom: 8px; }
.ltab {
  font: 1.3rem var(--jp);
  min-width: 48px;
  height: 48px;
  padding: 0 10px;
  border-radius: 10px;
  border: 2px solid transparent;
  color: #fff;
  cursor: pointer;
  opacity: 0.55;
  white-space: nowrap;
}
.ltab.on { opacity: 1; border-color: var(--fg); }
.ltab.t-rad { background: var(--rad); }
.ltab.t-kan { background: var(--kan); }
.ltab.t-voc { background: var(--voc); }
.ltab .rad-img { width: 1em; height: 1em; filter: invert(1); vertical-align: middle; }
.lnav { justify-content: space-between; }

/* item info */
.info { margin-top: 10px; }
.isec { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin: 10px 0; }
.ibig { font-size: 1.35rem; font-weight: 600; }
.kreads { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.kreads h4 { margin-top: 0; }
.kreads p { font-size: 1.15rem; }
.acc { font-weight: 700; }
.nacc { color: var(--muted); }
.mnem { border-top: 1px solid var(--line); margin-top: 10px; padding-top: 4px; }
.hint, .note { background: var(--panel-2); border-radius: 8px; padding: 6px 10px; margin-top: 8px; font-size: 0.92rem; }
.hint b, .note b { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.mk { font-weight: 600; border-radius: 3px; }
.mk-reading, .mk-meaning { padding: 0 0.15em; }
.mk-radical { color: var(--rad); }
.mk-kanji { color: var(--kan); }
.mk-vocabulary { color: var(--voc); }
.mk-reading { background: var(--reading-bg); color: var(--reading-fg); }
.mk-meaning { background: var(--panel-2); }
.mk-ja { font-family: var(--jp); }
.ctx { margin: 8px 0; }
.ctx [lang="ja"] { font-size: 1.1rem; }

/* chips: a link to another item */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  font: inherit;
  color: var(--fg);
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-left: 4px solid var(--muted);
  border-radius: 8px;
  padding: 4px 10px 5px 8px;
  cursor: pointer;
  min-width: 64px;
  max-width: 100%;
}
.chip:hover { border-color: var(--muted); }
.chip.t-rad { border-left-color: var(--rad); }
.chip.t-kan { border-left-color: var(--kan); }
.chip.t-voc { border-left-color: var(--voc); }
.chip-c { font-size: 1.35rem; line-height: 1.25; }
.chip-c .rad-img { width: 1em; height: 1em; vertical-align: -0.1em; }
.chip-m { font-size: 0.8rem; color: var(--muted); }
.chip-s { font-size: 0.72rem; color: var(--muted); }
.chip-st { position: absolute; top: 6px; right: 6px; width: 7px; height: 7px; border-radius: 50%; background: var(--line); }
.chip-st.g-apprentice { background: #e8590c; }
.chip-st.g-guru { background: #5f3dc4; }
.chip-st.g-master { background: #1971c2; }
.chip-st.g-enlightened { background: #0c8599; }
.chip-st.g-burned { background: #495057; }
@media (prefers-color-scheme: dark) { :root:not(.light) .chip-c .rad-img { filter: invert(1); } }
:root.dark .chip-c .rad-img { filter: invert(1); }

/* item sheet */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  overflow-y: auto;
  z-index: 10;
  padding: max(10px, env(safe-area-inset-top)) 10px 30px;
}
.sheet { max-width: 680px; margin: 0 auto; background: var(--bg); border-radius: var(--radius); padding: 10px 12px 16px; }
.sheet-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }

@media (max-width: 420px) {
  .hero { font-size: 2.8rem; }
  .kreads { grid-template-columns: 1fr 1fr; }
  .qcard { min-height: 28vh; }
}