/* Judo Study Guide — belt palette: white, black, red */
:root {
  --red: #b3252c;
  --red-dark: #8e1d23;
  --ink: #1a1a1c;
  --ink-soft: #4b4b52;
  --paper: #f7f5f1;
  --card: #ffffff;
  --line: #e4e0d8;
  --good: #2e7d4f;
  --warn: #b3252c;
  --gold: #c9972b;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(26,26,28,.08), 0 4px 16px rgba(26,26,28,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececec;
    --ink-soft: #a8a8b0;
    --paper: #141416;
    --card: #1e1e21;
    --line: #303036;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: calc(74px + env(safe-area-inset-bottom));
}

/* Top bar */
.topbar { background: var(--ink); color: #fff; }
@media (prefers-color-scheme: dark) { .topbar { background: #000; } }
.topbar-inner {
  max-width: 860px; margin: 0 auto; padding: 14px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-dot {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--red); flex-shrink: 0;
  box-shadow: inset 0 -3px 6px rgba(0,0,0,.25);
}
.brand h1 { font-size: 1.05rem; font-weight: 700; letter-spacing: .01em; }
.brand-sub { font-size: .72rem; opacity: .75; }
.rank-select {
  background: rgba(255,255,255,.12); color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 8px; padding: 8px 10px; font-size: .85rem; font-weight: 600;
}
.rank-select option { color: #000; }

/* Tabs */
.tabs {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 50;
  display: flex; background: var(--card);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab {
  flex: 1; padding: 9px 4px 8px; border: none; background: none;
  font-size: .72rem; font-weight: 600; color: var(--ink-soft);
  cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.tab-icon { font-size: 1.1rem; line-height: 1.2; }
.tab.active { color: var(--red); }
@media (min-width: 700px) {
  body { padding-bottom: 30px; }
  .tabs {
    position: static; max-width: 860px; margin: 14px auto 0;
    border: 1px solid var(--line); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow);
  }
  .tab { flex-direction: row; gap: 8px; padding: 12px; font-size: .85rem; }
}

main { max-width: 860px; margin: 0 auto; padding: 18px 16px 40px; }
.footer { max-width: 860px; margin: 0 auto; padding: 0 16px 24px; }
.footer p { font-size: .72rem; color: var(--ink-soft); text-align: center; }

h2.section { font-size: 1.25rem; margin: 4px 0 12px; }
.muted { color: var(--ink-soft); font-size: .85rem; }

/* Cards & panels */
.panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 16px; margin-bottom: 14px;
}
.panel h3 { font-size: .95rem; margin-bottom: 8px; }

/* Home */
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 10px; text-align: center; box-shadow: var(--shadow);
}
.stat b { display: block; font-size: 1.5rem; line-height: 1.2; }
.stat span { font-size: .72rem; color: var(--ink-soft); font-weight: 600; }
.stat.s-known b { color: var(--good); }
.stat.s-learning b { color: var(--gold); }
.progress-track {
  height: 10px; border-radius: 6px; background: var(--line); overflow: hidden;
  display: flex; margin: 10px 0 6px;
}
.progress-track .seg-known { background: var(--good); }
.progress-track .seg-learning { background: var(--gold); }
.home-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 14px; }
.big-btn {
  display: block; text-align: center; padding: 14px; border-radius: var(--radius);
  border: none; cursor: pointer; font-size: .95rem; font-weight: 700;
  background: var(--red); color: #fff;
}
.big-btn.secondary { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.big-btn:active { transform: translateY(1px); }
.cat-progress { display: flex; flex-direction: column; gap: 8px; }
.cat-line { display: flex; align-items: center; gap: 10px; font-size: .82rem; }
.cat-line .cat-name { width: 150px; flex-shrink: 0; font-weight: 600; }
.cat-line .cat-bar { flex: 1; height: 8px; border-radius: 5px; background: var(--line); overflow: hidden; display: flex; }
.cat-line .cat-count { width: 56px; text-align: right; color: var(--ink-soft); font-variant-numeric: tabular-nums; }

/* Learn */
.term-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.term-table td { padding: 8px 6px; border-top: 1px solid var(--line); vertical-align: top; }
.term-table tr:first-child td { border-top: none; }
.term-table .ja { font-weight: 700; white-space: nowrap; padding-right: 14px; }
.learn-intro { margin-bottom: 12px; }

/* Browse */
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.filter-bar select, .filter-bar input {
  padding: 9px 10px; border-radius: 9px; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); font-size: .85rem;
}
.filter-bar input { flex: 1; min-width: 140px; }
.vocab-item {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; margin-bottom: 8px;
  display: flex; align-items: center; gap: 10px;
}
.vocab-item .num { font-size: .7rem; color: var(--ink-soft); width: 30px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.vocab-item .texts { flex: 1; min-width: 0; }
.vocab-item .en { font-size: .85rem; }
.vocab-item .ja { font-weight: 700; font-size: .95rem; }
.vocab-item .note { font-size: .75rem; color: var(--ink-soft); margin-top: 3px; }
.badge {
  font-size: .65rem; font-weight: 700; padding: 3px 8px; border-radius: 20px;
  flex-shrink: 0; text-transform: uppercase; letter-spacing: .04em;
}
.badge.new { background: var(--line); color: var(--ink-soft); }
.badge.learning { background: rgba(201,151,43,.15); color: var(--gold); }
.badge.known { background: rgba(46,125,79,.15); color: var(--good); }

/* Flashcards */
.flash-setup label { display: block; font-size: .8rem; font-weight: 600; margin: 10px 0 4px; }
.flash-setup select { width: 100%; padding: 10px; border-radius: 9px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font-size: .9rem; }
.flashcard {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); min-height: 240px; padding: 26px 20px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; cursor: pointer; margin-bottom: 14px; position: relative;
}
.flashcard .side-label {
  position: absolute; top: 12px; left: 14px; font-size: .65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft);
}
.flashcard .cardnum { position: absolute; top: 12px; right: 14px; font-size: .7rem; color: var(--ink-soft); }
.flashcard .prompt { font-size: 1.25rem; font-weight: 700; }
.flashcard .answer { font-size: 1.5rem; font-weight: 800; color: var(--red); }
.flashcard .hint { margin-top: 12px; font-size: .8rem; color: var(--ink-soft); }
.flashcard .note { margin-top: 12px; font-size: .8rem; color: var(--ink-soft); border-top: 1px dashed var(--line); padding-top: 10px; }
.flash-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grade-btn { padding: 14px; border-radius: var(--radius); border: none; font-size: .95rem; font-weight: 700; cursor: pointer; color: #fff; }
.grade-btn.miss { background: var(--warn); }
.grade-btn.hit { background: var(--good); }
.flash-progressline { font-size: .78rem; color: var(--ink-soft); text-align: center; margin-bottom: 10px; }

/* Quiz */
.quiz-q { font-size: 1.05rem; font-weight: 700; margin-bottom: 14px; }
.quiz-opts { display: flex; flex-direction: column; gap: 9px; }
.quiz-opt {
  text-align: left; padding: 13px 14px; border-radius: 10px;
  border: 1.5px solid var(--line); background: var(--card); color: var(--ink);
  font-size: .95rem; font-weight: 600; cursor: pointer;
}
.quiz-opt:not(:disabled):hover { border-color: var(--ink-soft); }
.quiz-opt.correct { border-color: var(--good); background: rgba(46,125,79,.12); }
.quiz-opt.wrong { border-color: var(--warn); background: rgba(179,37,44,.12); }
.quiz-opt:disabled { cursor: default; opacity: .9; }
.quiz-meta { display: flex; justify-content: space-between; font-size: .78rem; color: var(--ink-soft); margin-bottom: 10px; }
.quiz-next { margin-top: 14px; width: 100%; }
.score-big { font-size: 2.4rem; font-weight: 800; text-align: center; margin: 8px 0; }
.quiz-review-item { padding: 10px 0; border-top: 1px solid var(--line); font-size: .85rem; }
.quiz-review-item:first-child { border-top: none; }
.quiz-review-item .r-q { font-weight: 600; }
.quiz-review-item .r-a { color: var(--good); font-weight: 700; }
.quiz-review-item .r-yours { color: var(--warn); }

.reset-link { background: none; border: none; color: var(--ink-soft); font-size: .75rem; text-decoration: underline; cursor: pointer; margin-top: 8px; }
.linklike { background: none; border: none; color: var(--red); font-size: inherit; text-decoration: underline; cursor: pointer; padding: 0; }
.hidden { display: none !important; }

/* ---------- Welcome / onboarding ---------- */
.welcome { text-align: center; padding: 30px 8px 10px; max-width: 460px; margin: 0 auto; }
.welcome-emoji { font-size: 3.4rem; margin-bottom: 14px; animation: pop-in .45s cubic-bezier(.2,1.6,.4,1); }
.welcome h2 { font-size: 1.5rem; margin-bottom: 12px; }
.welcome p { margin-bottom: 14px; }
.welcome .big-btn { width: 100%; margin-top: 10px; }
.rank-pick { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.rank-btn {
  padding: 14px 16px; border-radius: var(--radius); cursor: pointer;
  border: 1.5px solid var(--line); background: var(--card); color: var(--ink);
  text-align: left; font-size: 1rem;
}
.rank-btn:hover { border-color: var(--red); }
.rank-btn b { display: block; }
.rank-btn span { font-size: .78rem; color: var(--ink-soft); }
.howto { text-align: left; margin: 4px 0 10px; }
.howto-row { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.howto-row span { font-size: 1.1rem; flex-shrink: 0; }
.howto-row p { margin: 0; font-size: .9rem; }
@keyframes pop-in { from { transform: scale(.3); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* ---------- Home: streak bar + path ---------- */
.streak-bar { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 8px; }
.streak-cell {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 10px 6px; text-align: center;
}
.streak-cell b { display: block; font-size: 1.05rem; }
.streak-cell span { font-size: .68rem; color: var(--ink-soft); font-weight: 600; }
.flame-off { filter: grayscale(1); opacity: .55; }
.daily-track { height: 8px; border-radius: 5px; background: var(--line); overflow: hidden; margin-bottom: 16px; }
.daily-track div { height: 100%; background: var(--gold); border-radius: 5px; transition: width .4s; }

.continue-btn {
  width: 100%; padding: 18px 16px; text-align: left; margin-bottom: 10px;
  box-shadow: 0 4px 0 var(--red-dark);
}
.continue-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 var(--red-dark); }
.continue-label { display: block; font-size: 1.02rem; letter-spacing: .02em; }
.continue-sub { display: block; font-size: .8rem; font-weight: 500; opacity: .85; margin-top: 3px; }
.path-hint { text-align: center; margin-bottom: 16px; }

.path { display: flex; flex-direction: column; gap: 10px; position: relative; }
.path-divider { text-align: center; margin: 14px 0 4px; position: relative; }
.path-divider span {
  font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-soft); background: var(--paper); padding: 0 12px; position: relative; z-index: 1;
}
.path-divider::before {
  content: ""; position: absolute; left: 0; right: 0; top: 50%;
  border-top: 1px solid var(--line);
}
.path-unit {
  display: flex; align-items: center; gap: 14px; width: 100%;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; cursor: pointer; text-align: left; color: var(--ink);
  font-family: inherit;
}
.path-circle {
  width: 46px; height: 46px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
  background: var(--line);
}
.path-unit.done .path-circle { background: var(--red); color: #fff; font-weight: 800; }
.path-unit.gold .path-circle { background: linear-gradient(145deg, #e6b93f, #c9972b); }
.path-unit.next { border-color: var(--red); box-shadow: 0 0 0 3px rgba(179,37,44,.15); }
.path-unit.next .path-circle { background: rgba(179,37,44,.12); animation: pulse 1.8s infinite; }
.path-unit.todo { opacity: .78; }
.path-texts { flex: 1; min-width: 0; }
.path-texts b { display: block; font-size: .95rem; }
.path-texts span { font-size: .76rem; color: var(--ink-soft); }
.path-start {
  font-size: .65rem; font-weight: 800; letter-spacing: .08em; color: var(--red);
  border: 1.5px solid var(--red); border-radius: 20px; padding: 4px 9px; flex-shrink: 0;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(179,37,44,.35); } 50% { box-shadow: 0 0 0 8px rgba(179,37,44,0); } }

/* ---------- Lesson ---------- */
.lesson-top { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.lesson-quit {
  background: none; border: none; font-size: 1.15rem; color: var(--ink-soft);
  cursor: pointer; padding: 4px 6px;
}
.lesson-track { flex: 1; height: 12px; border-radius: 7px; background: var(--line); overflow: hidden; }
.lesson-track div { height: 100%; background: var(--good); border-radius: 7px; transition: width .35s; }
.lesson-xp { font-size: .8rem; font-weight: 700; color: var(--gold); }
.ex-panel { padding: 20px 16px; }
.ex-kicker {
  font-size: .68rem; font-weight: 800; letter-spacing: .1em; color: var(--ink-soft);
  margin-bottom: 12px;
}
.ex-feedback { min-height: 26px; margin-top: 12px; font-size: .95rem; text-align: center; }
.fb-good { color: var(--good); font-weight: 800; animation: pop-in .3s; display: inline-block; }
.fb-bad { color: var(--warn); font-weight: 600; }
.intro-card { text-align: center; padding: 22px 8px 26px; }
.intro-ja { font-size: 1.7rem; font-weight: 800; color: var(--red); }
.intro-en { font-size: 1.05rem; margin-top: 8px; }
.intro-note { font-size: .8rem; color: var(--ink-soft); margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 10px; }
.ex-panel .big-btn { width: 100%; margin-top: 10px; }

/* Builder tiles */
.build-slots {
  min-height: 54px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  border-bottom: 2px solid var(--line); padding: 8px 2px; margin-bottom: 16px;
}
.build-hint { font-size: .8rem; color: var(--ink-soft); }
.build-pool { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.tile {
  padding: 10px 14px; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--card); color: var(--ink); font-size: .95rem; font-weight: 700;
  cursor: pointer; box-shadow: 0 2px 0 var(--line);
}
.tile:active { transform: translateY(1px); box-shadow: none; }
.tile.placed { border-color: var(--red); color: var(--red); }
.tile.used { opacity: .25; cursor: default; }

/* Matching */
.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.match-col { display: flex; flex-direction: column; gap: 8px; }
.match-btn {
  padding: 12px 10px; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--card); color: var(--ink); font-size: .82rem; font-weight: 600;
  cursor: pointer; min-height: 52px;
}
.match-btn.ja { font-weight: 800; }
.match-btn.sel { border-color: var(--red); background: rgba(179,37,44,.08); }
.match-btn.solved { border-color: var(--good); background: rgba(46,125,79,.12); opacity: .6; cursor: default; }
.match-btn.shake { animation: shake .35s; border-color: var(--warn); }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }

/* Belt dots & technique reference */
.belt-dot {
  display: inline-block; width: 11px; height: 11px; border-radius: 50%;
  margin-right: 7px; vertical-align: baseline; border: 1px solid rgba(0,0,0,.2);
}
.tech-scroll { overflow-x: auto; }
.tech-req td { font-variant-numeric: tabular-nums; padding: 6px 8px; font-size: .8rem; }
.tech-req td:first-child { min-width: 170px; }
.tech-details summary {
  cursor: pointer; font-weight: 700; font-size: .95rem; padding: 2px 0;
}
.tech-details[open] summary { margin-bottom: 8px; }
.tech-ul { margin: 4px 0 4px 20px; font-size: .88rem; }
.tech-ul li { margin-bottom: 5px; }

/* Celebration */
.celebrate { text-align: center; padding: 40px 10px 10px; }
.celebrate-emoji { font-size: 4rem; animation: pop-in .5s cubic-bezier(.2,1.6,.4,1); }
.celebrate h2 { font-size: 1.6rem; margin: 10px 0 4px; }
.celebrate .big-btn { width: 100%; max-width: 340px; margin-top: 18px; }
.goal-hit { color: var(--good); font-weight: 700; margin-top: 10px; }