:root {
  --bg: #fbf9f5; --panel: #fff; --ink: #1e1c19; --ink-soft: #55504a; --ink-faint: #8b847c;
  --rule: #e3ddd3; --accent: #9a4a2f; --accent-soft: #f4e6df;
  --good: #2f6b46; --good-soft: #e4f0e8; --bad: #a33a2f; --bad-soft: #f8e5e2;
  --warn: #8a6a1f; --code-bg: #f2ede4;
  --serif: Charter, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161513; --panel: #1e1d1a; --ink: #ece7df; --ink-soft: #b3aca2; --ink-faint: #837c72;
    --rule: #33302b; --accent: #e08a63; --accent-soft: #33261f;
    --good: #7cc79b; --good-soft: #1d2d24; --bad: #e8897c; --bad-soft: #331f1d;
    --warn: #d8b45e; --code-bg: #26241f;
  }
}
* { box-sizing: border-box; }
/* Must come before any display rule: an explicit `display` (e.g. flex on .reveal-btn)
   otherwise beats the [hidden] attribute and the element stays visible. */
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── top bar ── */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .9rem 1.25rem; border-bottom: 1px solid var(--rule);
  background: var(--panel); position: sticky; top: 0; z-index: 10;
}
.brand {
  font-family: var(--serif); font-size: 1.15rem; font-weight: 600; letter-spacing: -.01em;
}
.topbar nav { display: flex; gap: .3rem; }
.tab {
  font-family: var(--mono); font-size: .76rem; letter-spacing: .05em; text-transform: uppercase;
  padding: .4rem .75rem; border: 1px solid transparent; background: none;
  color: var(--ink-faint); border-radius: 5px; cursor: pointer;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); background: var(--accent-soft); }

main { max-width: 42rem; margin: 0 auto; padding: 2rem 1.25rem 5rem; }
.view { display: none; }
.view.active { display: block; }

h2 { font-family: var(--serif); font-size: 1.2rem; margin: 2.5rem 0 .4rem; font-weight: 600; }
.muted { color: var(--ink-soft); font-size: .89rem; }
a { color: var(--accent); }

/* ── review ── */
.queue-meta {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 1rem; display: flex; gap: 1.1rem; flex-wrap: wrap;
}
.queue-meta b { color: var(--ink); font-weight: 600; }
.queue-meta .dot { color: var(--accent); }

.card {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 10px;
  padding: 2rem 1.75rem;
}
.card-head { display: flex; gap: .4rem; margin-bottom: 1.1rem; flex-wrap: wrap; }
.badge {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .07em; text-transform: uppercase;
  padding: .18rem .5rem; border-radius: 4px; background: var(--code-bg); color: var(--ink-faint);
  border: 1px solid var(--rule);
}
.badge.level { color: var(--accent); background: var(--accent-soft); border-color: transparent; }

.term-row { display: flex; align-items: center; gap: .7rem; }
.term {
  font-family: var(--serif); font-size: 2.4rem; line-height: 1.15; letter-spacing: -.02em;
  margin: 0; font-weight: 600; flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere;
}
.say {
  flex: 0 0 auto; width: 2.4rem; height: 2.4rem; border-radius: 50%;
  border: 1px solid var(--rule); background: var(--bg); cursor: pointer;
  font-size: 1rem; line-height: 1; display: grid; place-items: center;
  transition: transform .12s, border-color .12s, background .12s;
}
.say:hover { border-color: var(--accent); background: var(--accent-soft); }
.say.speaking { border-color: var(--accent); background: var(--accent-soft); transform: scale(1.12); }
.ipa-row {
  display: flex; align-items: center; gap: .55rem; flex-wrap: wrap;
  margin: .35rem 0 1.15rem; min-height: 1.4em;
}
.ipa { font-family: var(--mono); font-size: .85rem; color: var(--ink-faint); }
.src {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .07em; text-transform: uppercase;
  padding: .12rem .45rem; border-radius: 3px; border: 1px solid transparent; cursor: help;
}
.src-human { color: var(--good); background: var(--good-soft); }
.src-synth { color: var(--ink-faint); background: var(--code-bg); border-color: var(--rule); }

.reveal-btn {
  width: 100%; padding: .8rem; font-family: var(--sans); font-size: .95rem;
  background: var(--accent); color: #fff; border: none; border-radius: 6px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: .6rem;
}
.reveal-btn:hover { filter: brightness(1.08); }
@media (prefers-color-scheme: dark) { .reveal-btn { color: #1a1512; font-weight: 600; } }

kbd {
  font-family: var(--mono); font-size: .68rem; padding: .1rem .32rem;
  border: 1px solid currentColor; border-radius: 3px; opacity: .55;
}

.back { border-top: 1px solid var(--rule); margin-top: 1.5rem; padding-top: 1.5rem; }
.def { font-size: 1.05rem; margin: 0 0 1rem; }
.ex {
  font-family: var(--serif); font-size: 1.05rem; font-style: italic;
  color: var(--ink-soft); background: var(--code-bg);
  border-left: 3px solid var(--accent); border-radius: 0 5px 5px 0;
  padding: .8rem 1rem; margin: 0 0 1rem;
}
.ex b { font-style: normal; color: var(--accent); font-weight: 600; }
.col {
  font-family: var(--mono); font-size: .82rem; color: var(--ink-faint);
  margin: 0 0 1.5rem; line-height: 1.7;
}
.col:empty { display: none; }
.col b { color: var(--ink-soft); font-weight: 600; }

.grade-label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .6rem;
}
.grade-btns { display: grid; grid-template-columns: repeat(4, 1fr); gap: .45rem; }
.g {
  display: flex; flex-direction: column; align-items: center; gap: .12rem;
  padding: .65rem .3rem; border: 1px solid var(--rule); background: var(--bg);
  border-radius: 6px; cursor: pointer; color: var(--ink); font-family: var(--sans);
}
.g:hover { border-color: var(--accent); }
.g b { font-size: .88rem; font-weight: 600; }
.g span { font-size: .68rem; color: var(--ink-faint); }
.g kbd { margin-top: .15rem; }
.g[data-q="1"]:hover { background: var(--bad-soft); border-color: var(--bad); }
.g[data-q="5"]:hover { background: var(--good-soft); border-color: var(--good); }

.know-btn {
  width: 100%; margin-top: .7rem; padding: .6rem; font-size: .85rem;
  background: none; border: 1px dashed var(--rule); color: var(--ink-faint);
  border-radius: 6px; cursor: pointer; font-family: var(--sans);
  display: flex; align-items: center; justify-content: center; gap: .5rem;
}
.know-btn:hover { border-color: var(--good); color: var(--good); border-style: solid; }

.empty { text-align: center; padding: 4rem 1rem; }
.empty h2 { font-size: 1.5rem; margin-bottom: .5rem; }
.empty p { color: var(--ink-soft); max-width: 28rem; margin: 0 auto; }

/* ── browse ── */
.controls { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.controls input[type=search] {
  flex: 1 1 14rem; padding: .55rem .75rem; border: 1px solid var(--rule);
  border-radius: 6px; background: var(--panel); color: var(--ink); font-size: .9rem;
  font-family: var(--sans);
}
.controls select {
  padding: .55rem .5rem; border: 1px solid var(--rule); border-radius: 6px;
  background: var(--panel); color: var(--ink); font-size: .85rem; font-family: var(--sans);
}
.browse-count {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .8rem;
}
.list { display: flex; flex-direction: column; gap: .4rem; }
.row-item {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 7px;
  padding: .8rem 1rem; display: grid; grid-template-columns: 1fr auto; gap: .6rem;
  align-items: start;
}
.row-item.is-known { opacity: .5; }
.row-item h3 {
  font-family: var(--serif); font-size: 1.05rem; margin: 0 0 .15rem; font-weight: 600;
}
.row-item .meta {
  font-family: var(--mono); font-size: .67rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: .3rem;
}
.row-item .d { font-size: .88rem; color: var(--ink-soft); margin: 0 0 .3rem; }
.row-item .e {
  font-family: var(--serif); font-style: italic; font-size: .88rem;
  color: var(--ink-faint); margin: 0;
}
.row-item .e b { font-style: normal; color: var(--accent); font-weight: 600; }
.mark {
  font-family: var(--mono); font-size: .68rem; padding: .3rem .5rem; white-space: nowrap;
  border: 1px solid var(--rule); background: var(--bg); color: var(--ink-faint);
  border-radius: 5px; cursor: pointer;
}
.mark:hover { border-color: var(--good); color: var(--good); }
.mark.on { background: var(--good-soft); border-color: var(--good); color: var(--good); }

/* ── stats ── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr)); gap: .6rem; }
.stat {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 8px;
  padding: 1rem; text-align: center;
}
.stat .n { font-family: var(--serif); font-size: 1.9rem; font-weight: 600; line-height: 1; }
.stat .l {
  font-family: var(--mono); font-size: .66rem; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-faint); margin-top: .35rem;
}
.newlimit { display: flex; align-items: center; gap: 1rem; margin-top: .5rem; }
.newlimit input { flex: 1; accent-color: var(--accent); }
.newlimit output { font-family: var(--mono); font-size: .9rem; min-width: 3.5rem; }

.row { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .6rem; }
.secondary, .danger, .as-btn {
  font-family: var(--sans); font-size: .85rem; padding: .5rem .9rem;
  border: 1px solid var(--rule); background: var(--panel); color: var(--ink);
  border-radius: 6px; cursor: pointer;
}
.secondary:hover, .as-btn:hover { border-color: var(--accent); color: var(--accent); }
.danger { color: var(--bad); }
.danger:hover { background: var(--bad-soft); border-color: var(--bad); }

/* ── sync ── */
.sync-box {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 8px;
  padding: 1.1rem 1.2rem; margin-top: .8rem;
}
.sync-box > label {
  display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .07em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: .4rem;
}
.sync-row { display: flex; gap: .4rem; margin-bottom: .7rem; }
.sync-row input {
  flex: 1 1 12rem; min-width: 0; padding: .5rem .7rem; border: 1px solid var(--rule);
  border-radius: 6px; background: var(--bg); color: var(--ink);
  font-family: var(--mono); font-size: .82rem;
}
.sync-warn {
  font-size: .82rem; color: var(--ink-soft); background: var(--code-bg);
  border-left: 3px solid var(--warn); border-radius: 0 5px 5px 0;
  padding: .6rem .8rem; margin: 0 0 .8rem;
}
.sync-adv { margin-bottom: .8rem; font-size: .85rem; }
.sync-adv summary {
  cursor: pointer; color: var(--ink-faint); font-family: var(--mono);
  font-size: .74rem; letter-spacing: .06em; text-transform: uppercase;
}
.sync-adv summary:hover { color: var(--accent); }
.sync-adv label { display: block; color: var(--ink-soft); margin: .6rem 0 .35rem; font-size: .82rem; }
.sync-adv code { font-family: var(--mono); background: var(--code-bg); padding: .05rem .3rem; border-radius: 3px; }
.sync-adv input {
  width: 100%; padding: .5rem .7rem; border: 1px solid var(--rule); border-radius: 6px;
  background: var(--bg); color: var(--ink); font-family: var(--mono); font-size: .8rem;
}
.sync-status { font-size: .85rem; margin: .8rem 0 0; min-height: 1.2em; }
.sync-status.muted { color: var(--ink-faint); }
.sync-status.ok { color: var(--good); }
.sync-status.warn { color: var(--warn); }
.sync-status.err { color: var(--bad); }

/* ── lessons ── */
.lesson-list { display: flex; flex-direction: column; gap: 0; margin-bottom: .5rem; }
.area-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem;
  margin: 1.6rem 0 .6rem; padding-bottom: .4rem; border-bottom: 1px solid var(--rule);
}
.lesson-list > .area-head:first-child { margin-top: .8rem; }
.area-name {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
}
.area-progress {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .06em;
  text-transform: uppercase; color: var(--ink-faint); white-space: nowrap;
}
.area-progress.complete { color: var(--good); }
.area-items { display: flex; flex-direction: column; gap: .5rem; }
.lesson {
  background: var(--panel); border: 1px solid var(--rule); border-radius: 8px;
  padding: 1.1rem 1.25rem; display: grid; grid-template-columns: 1fr auto;
  gap: 1rem; align-items: start;
}
.lesson.is-done { opacity: .62; }
.lesson-meta { display: flex; gap: .35rem; margin-bottom: .5rem; flex-wrap: wrap; }
.badge.done { color: var(--good); background: var(--good-soft); border-color: transparent; }
.badge.opened { color: var(--warn); border-color: transparent; }
.lesson h3 {
  font-family: var(--serif); font-size: 1.2rem; margin: 0 0 .4rem;
  font-weight: 600; letter-spacing: -.01em; line-height: 1.25;
}
.lesson p { margin: 0; font-size: .9rem; color: var(--ink-soft); line-height: 1.55; }
.lesson-actions { display: flex; flex-direction: column; gap: .35rem; align-items: stretch; }
.open-btn {
  font-family: var(--mono); font-size: .74rem; letter-spacing: .05em; text-transform: uppercase;
  padding: .45rem .8rem; border-radius: 6px; text-decoration: none; white-space: nowrap;
  background: var(--accent); color: #fff; text-align: center;
}
.open-btn:hover { filter: brightness(1.08); }
@media (prefers-color-scheme: dark) { .open-btn { color: #1a1512; font-weight: 600; } }

@media (max-width: 34rem) {
  .lesson { grid-template-columns: 1fr; }
  .lesson-actions { flex-direction: row; }
  .open-btn { flex: 1; }
}

/* ── add a word ── */
.cands { display: flex; flex-direction: column; gap: .45rem; margin-bottom: .9rem; }
.cand {
  text-align: left; background: var(--bg); border: 1px solid var(--rule);
  border-radius: 7px; padding: .75rem .9rem; cursor: pointer; color: var(--ink);
  font-family: var(--sans); transition: border-color .12s, background .12s;
}
.cand:hover { border-color: var(--accent); }
.cand.chosen { border-color: var(--accent); background: var(--accent-soft); }
.cand-head { display: flex; align-items: center; gap: .5rem; margin-bottom: .35rem; }
.cand-ipa { font-family: var(--mono); font-size: .76rem; color: var(--ink-faint); }
.cand-def { margin: 0 0 .3rem; font-size: .92rem; }
.cand-ex {
  margin: 0; font-family: var(--serif); font-style: italic; font-size: .9rem; color: var(--ink-soft);
}
.cand-ex b { font-style: normal; color: var(--accent); font-weight: 600; }
.cand-ex.none { color: var(--warn); font-style: normal; font-family: var(--mono); font-size: .76rem; }
.cand-syn {
  margin: .35rem 0 0; font-family: var(--mono); font-size: .76rem; color: var(--ink-faint);
}
.cand-attr {
  margin: .2rem 0 0; font-size: .74rem; color: var(--ink-faint); font-style: italic;
}

.add-form { border-top: 1px solid var(--rule); padding-top: 1rem; margin-top: .3rem; }
.field-grid {
  display: grid; grid-template-columns: 2fr 1.4fr .8fr; gap: .5rem; margin-bottom: .7rem;
}
.add-form label, .field {
  display: block; font-family: var(--mono); font-size: .68rem; letter-spacing: .06em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: .7rem;
}
.add-form .opt { text-transform: none; letter-spacing: 0; font-style: italic; opacity: .8; }
.add-form input, .add-form textarea, .add-form select {
  display: block; width: 100%; margin-top: .3rem; padding: .5rem .65rem;
  border: 1px solid var(--rule); border-radius: 6px; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: .92rem; text-transform: none; letter-spacing: 0;
}
.add-form textarea { resize: vertical; font-family: var(--serif); }
.add-form input:focus, .add-form textarea:focus, .add-form select:focus {
  outline: none; border-color: var(--accent);
}
.row-actions { display: flex; flex-direction: column; gap: .3rem; }
.mark.danger-ghost { color: var(--bad); }
.mark.danger-ghost:hover { border-color: var(--bad); background: var(--bad-soft); color: var(--bad); }

@media (max-width: 34rem) { .field-grid { grid-template-columns: 1fr; } }

/* No physical keyboard → the shortcut hints are just noise */
@media (pointer: coarse) { kbd { display: none; } }

/* Four tabs no longer fit a 375px bar at the default padding. */
@media (max-width: 26rem) {
  .topbar { padding: .8rem .7rem; gap: .5rem; }
  .brand { font-size: 1rem; }
  .topbar nav { gap: .1rem; }
  .tab { padding: .4rem .4rem; letter-spacing: .02em; }
}

@media (max-width: 30rem) {
  .term { font-size: 1.9rem; }
  .grade-btns { grid-template-columns: repeat(2, 1fr); }
  .card { padding: 1.5rem 1.25rem; }
}