/* 词页 · 六级词汇
   Light paper + ink, one vermilion accent. All corners sharp. */

:root {
  color-scheme: light;
  --paper: #f4f4ef;
  --paper-raised: #ecece3;
  --ink: #191b16;
  --ink-2: #5c6157;
  --ink-3: #6f746a;
  --rule: #dedfd4;
  --rule-strong: #c3c5b8;
  --accent: #b23a24;
  --accent-ink: #fffaf3;
  --accent-soft: #f1e0d9;
  --mark: rgba(178, 58, 36, 0.055);
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, "Songti SC", STSong, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --paper: #151712;
  --paper-raised: #1d201a;
  --ink: #e8e7dc;
  --ink-2: #a8ac9f;
  --ink-3: #8f9488;
  --rule: #2b2f28;
  --rule-strong: #3d4239;
  --accent: #e07056;
  --accent-ink: #191408;
  --accent-soft: #38241d;
  --mark: rgba(224, 112, 86, 0.07);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    color-scheme: dark;
    --paper: #151712;
    --paper-raised: #1d201a;
    --ink: #e8e7dc;
    --ink-2: #a8ac9f;
    --ink-3: #8f9488;
    --rule: #2b2f28;
    --rule-strong: #3d4239;
    --accent: #e07056;
    --accent-ink: #191408;
    --accent-soft: #38241d;
    --mark: rgba(224, 112, 86, 0.07);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
[hidden] { display: none !important; }
button, input { font: inherit; color: inherit; }
button { touch-action: manipulation; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.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;
}

/* ---------- top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.topbar.is-scrolled { border-bottom-color: var(--rule); }
.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; flex: none; }
.seal {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1;
  transform: rotate(-2deg);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--serif); font-size: 19px; letter-spacing: 0.06em; }
.brand-sub { margin-top: 2px; font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.08em; color: var(--ink-3); }
.head-tabs { margin-left: auto; display: flex; gap: 26px; }
.head-tabs .tab {
  background: none; border: 0; padding: 6px 0; cursor: pointer;
  color: var(--ink-2); font: 500 14px/1 var(--sans);
  border-bottom: 2px solid transparent;
}
.head-tabs .tab:hover { color: var(--ink); }
.head-tabs .tab[aria-selected="true"] { color: var(--accent); border-bottom-color: var(--accent); }
.theme-btn {
  margin-left: 8px; padding: 7px 9px; cursor: pointer;
  background: none; border: 1px solid var(--rule-strong);
  color: var(--ink-2); font: 11px/1 var(--sans);
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); }

.stage { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.view { padding: 46px 0 120px; }

/* ---------- page head ---------- */
.page-head {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 20px;
  padding-bottom: 18px; border-bottom: 1px solid var(--ink);
}
.page-title { margin: 0; font: 400 34px/1.1 var(--serif); letter-spacing: 0.01em; }
.page-note { margin: 8px 0 0; color: var(--ink-2); font-size: 13.5px; }
.count-line { margin: 0 0 4px; font: 11px/1.5 var(--mono); color: var(--ink-3); white-space: nowrap; }
.count-line [data-known-count] { color: var(--accent); font-size: 15px; }
.count-line [data-write-done] { color: var(--accent); font-size: 15px; }
.count-of { color: var(--ink-3); }
.focus-head { align-items: flex-start; }
.focus-tools { display: flex; gap: 16px; padding-top: 8px; }

.text-btn {
  background: none; border: 0; padding: 0 0 2px; cursor: pointer;
  color: var(--ink-2); font: 12px/1.4 var(--sans);
  border-bottom: 1px solid var(--rule-strong);
}
.text-btn:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- toolbar ---------- */
.toolbar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding-top: 18px; }
.search {
  display: flex; align-items: center; gap: 8px; flex: 1 1 220px; max-width: 320px;
  padding-bottom: 7px; border-bottom: 1px solid var(--rule-strong);
}
.search:focus-within { border-bottom-color: var(--accent); }
.search input {
  flex: 1; min-width: 0; padding: 0;
  background: none; border: 0; outline: none;
  color: var(--ink); font: 14px var(--sans);
}
.search input::placeholder { color: var(--ink-3); }
.search input::-webkit-search-cancel-button { -webkit-appearance: none; }
.search-key {
  flex: none; padding: 1px 5px;
  border: 1px solid var(--rule-strong);
  color: var(--ink-3); font: 10px/1.5 var(--mono);
}
.tool-actions { display: flex; gap: 8px; margin-left: auto; }
.chip {
  padding: 7px 11px; cursor: pointer;
  background: none; border: 1px solid var(--rule-strong);
  color: var(--ink-2); font: 12px/1 var(--sans);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.chip:hover { color: var(--ink); border-color: var(--ink-2); }
.chip[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.match-line { min-height: 18px; margin: 12px 0 0; font: 11px/1.6 var(--mono); color: var(--ink-3); }

/* ---------- word list ---------- */
.word-list { list-style: none; margin: 6px 0 0; padding: 0; }
.entry {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 36px;
  gap: 12px;
  align-items: start;
  margin: 0 -10px;
  padding: 17px 10px 16px;
  border-bottom: 1px solid var(--rule);
  transition: background 0.14s ease;
}
.entry:hover { background: var(--mark); }
.entry.is-active { background: var(--mark); box-shadow: inset 3px 0 0 var(--accent); }
.entry.is-removing {
  transition: height 0.22s ease, padding 0.22s ease, opacity 0.16s ease,
              transform 0.22s ease, border-color 0.22s ease;
}
.entry.is-returning { animation: returnin 0.28s ease both; }
.entry-index {
  padding-top: 5px;
  text-align: right;
  font: 10px/1.9 var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
}
.entry-body { min-width: 0; }
.entry-word {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.012em;
  overflow-wrap: anywhere;
}
.entry-meaning {
  margin-top: 6px;
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-2);
}
.sense { display: block; }
.pos {
  margin-right: 5px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.03em;
  color: var(--ink-3);
}
.known-btn {
  width: 34px; height: 32px;
  display: grid; place-items: center;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink-2);
  font: 500 12px/1 var(--sans);
  transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.1s;
}
.known-btn:hover, .known-btn:focus-visible {
  color: var(--accent); border-color: var(--accent); background: var(--accent-soft);
}
.known-btn:active { transform: scale(0.94); }
.known-btn.restore { width: auto; padding: 0 10px; }
.is-veiled .entry-meaning {
  filter: blur(4.5px);
  opacity: 0.6;
  cursor: pointer;
  user-select: none;
  transition: filter 0.18s ease, opacity 0.18s ease;
}
.is-veiled .entry-meaning.is-revealed { filter: none; opacity: 1; cursor: default; user-select: auto; }

.list-end { height: 1px; }
.shortcuts { margin: 6px 0 0; font: 10.5px/1.8 var(--mono); color: var(--ink-3); letter-spacing: 0.02em; }
@media (hover: none) { .shortcuts { display: none; } }
.credit { margin: 40px 0 0; font: 10.5px/1.8 var(--mono); color: var(--ink-3); }
.credit span { color: var(--ink-2); }

/* ---------- empty ---------- */
.empty { padding: 90px 0; text-align: center; }
.empty h2 { margin: 0; font: 400 26px/1.2 var(--serif); }
.empty p { margin: 10px 0 0; color: var(--ink-2); font-size: 13.5px; }

/* ---------- buttons ---------- */
.btn {
  padding: 11px 20px; cursor: pointer;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  font: 14px/1 var(--sans);
  transition: border-color 0.15s, background 0.15s, color 0.15s, transform 0.1s;
}
.btn:hover { border-color: var(--ink-2); }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { background: var(--accent); border-color: var(--ink); }
.btn-small { padding: 8px 13px; font-size: 12px; }

/* ---------- focus ---------- */
.focus-stage {
  min-height: calc(100dvh - 250px);
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  text-align: center;
  padding: 36px 0 48px;
}
.focus-stats {
  display: flex; gap: 22px;
  margin: 0 0 6px;
  font: 11px/1.5 var(--mono); letter-spacing: 0.04em;
  color: var(--ink-3);
}
.focus-stats b { font-weight: 500; color: var(--ink-2); }
.focus-card { width: 100%; padding: 22px 0 6px; }
.focus-card.is-entering { animation: wordin 0.2s ease both; }
.focus-kicker {
  margin: 0 0 24px;
  font: 10px/1.5 var(--mono);
  letter-spacing: 0.16em;
  color: var(--ink-3);
}
.focus-word {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(42px, 9vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.focus-word.is-long { font-size: clamp(30px, 5.5vw, 52px); }
.focus-word.is-very-long { font-size: clamp(24px, 4vw, 38px); }
.focus-meaning {
  max-width: 36ch;
  margin: 0 auto;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.95;
  color: var(--ink-2);
}
.is-veiled .focus-meaning {
  filter: blur(5px);
  opacity: 0.65;
  cursor: pointer;
  user-select: none;
  transition: filter 0.18s ease, opacity 0.18s ease;
}
.is-veiled .focus-meaning.is-revealed { filter: none; opacity: 1; cursor: default; user-select: auto; }
.focus-meaning .sense { display: block; }
.focus-actions { display: flex; justify-content: center; gap: 12px; margin-top: 42px; }
.key-hint { margin: 26px 0 0; font: 10.5px/1.6 var(--mono); color: var(--ink-3); letter-spacing: 0.03em; }
.focus-done { margin-top: 26px; padding: 110px 0 90px; text-align: center; border-top: 1px solid var(--rule); }
.focus-done h2 { margin: 0; font: 400 32px/1.2 var(--serif); }
.focus-done p { margin: 10px 0 0; color: var(--ink-2); font-size: 13.5px; }

@keyframes wordin {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@keyframes returnin {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

/* ---------- copy sheet ---------- */
.copy-actions { display: flex; gap: 8px; flex: none; }
.sheet { list-style: none; margin: 28px 0 0; padding: 0; border-top: 1px solid var(--ink); }
.sheet-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0 15px;
  border-bottom: 1px solid var(--rule);
  break-inside: avoid;
}
.sheet-num {
  padding-top: 5px; text-align: right;
  font: 10px/1.8 var(--mono); font-variant-numeric: tabular-nums;
  color: var(--ink-3);
}
.sheet-word { font: 400 21px/1.25 var(--serif); letter-spacing: -0.01em; overflow-wrap: anywhere; }
.sheet-meaning { margin-top: 5px; font: 13.5px/1.7 var(--serif); color: var(--ink-2); }
.copy-foot {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; margin-top: 22px;
  color: var(--ink-3); font-size: 12px;
}
.copy-foot p { margin: 0; }
.print-only { display: none; }
.print-note { color: var(--ink-2); font-size: 13.5px; padding: 40px 0; }

/* ---------- write ---------- */
.today-card {
  margin-top: 26px;
  padding: 20px 22px 18px;
  background: var(--mark);
  border: 1px solid var(--rule-strong);
  border-top: 2px solid var(--accent);
}
.today-top { display: flex; align-items: baseline; gap: 10px; }
.today-label { font: 10px/1.5 var(--mono); letter-spacing: 0.16em; color: var(--accent); }
.today-date { font: 10px/1.5 var(--mono); letter-spacing: 0.06em; color: var(--ink-3); }
.today-title { margin: 8px 0 0; font: 400 26px/1.3 var(--serif); letter-spacing: 0.01em; }
.today-sub { margin: 6px 0 0; font: 11px/1.6 var(--mono); color: var(--ink-3); }
.today-actions { display: flex; align-items: center; gap: 16px; margin-top: 16px; }

.write-tools {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-top: 28px; padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
}
.write-tools .tool-actions { margin-left: 0; }
.write-total { display: none; margin: 0 0 0 auto; font: 10.5px/1.5 var(--mono); color: var(--ink-3); }

.write-group { margin-top: 26px; }
.write-group-head {
  margin: 0; padding-bottom: 7px;
  font: 10px/1.6 var(--mono); letter-spacing: 0.14em;
  color: var(--ink-3);
}
.write-row {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: 14px; align-items: baseline;
  width: 100%; margin: 0; padding: 13px 0;
  background: none; border: 0; border-bottom: 1px solid var(--rule);
  color: inherit; text-align: left; cursor: pointer;
  transition: background 0.14s ease;
}
.write-row:hover { background: var(--mark); }
.kind-tag {
  justify-self: start;
  display: inline-grid; place-items: center;
  width: 22px; height: 22px;
  border: 1px solid var(--rule-strong);
  color: var(--ink-2);
  font: 11px/1 var(--serif);
}
.kind-tag.is-writing { color: var(--accent); border-color: var(--accent); }
.write-row-main { min-width: 0; }
.write-row-title {
  display: block;
  font: 400 18px/1.4 var(--serif); letter-spacing: 0.005em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.write-row-preview {
  display: block; margin-top: 2px;
  font: 12px/1.6 var(--serif); color: var(--ink-3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.write-row-mark { font: 10px/1.5 var(--mono); color: var(--ink-3); white-space: nowrap; }
.write-row.is-done .write-row-mark { color: var(--accent); }

/* practice */
.practice { padding-top: 26px; }
.practice-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-bottom: 14px; border-bottom: 1px solid var(--ink);
}
.back-btn { font-size: 12px; }
.practice-tags { display: flex; align-items: center; gap: 10px; }
.practice-tags .kind-tag { width: auto; height: auto; padding: 4px 7px; font: 10px/1 var(--sans); }
.practice-exam { font: 10.5px/1.5 var(--mono); color: var(--ink-3); }
.practice-title {
  margin: 20px 0 0;
  font: 400 30px/1.3 var(--serif); letter-spacing: 0.01em;
  overflow-wrap: anywhere;
}
.block-label {
  margin: 0;
  font: 10px/1.6 var(--mono); letter-spacing: 0.14em;
  color: var(--ink-3);
}
.block-label.is-secondary { margin-top: 24px; }
.prompt-block { margin-top: 26px; }
.prompt-text { margin-top: 10px; font: 400 16.5px/1.95 var(--serif); }
.prompt-text p { margin: 0 0 12px; }
.prompt-text p:last-child { margin-bottom: 0; }
.prompt-text.is-secondary {
  margin-top: 6px;
  font-size: 13.5px; line-height: 1.85; color: var(--ink-2);
}
.prompt-gist { margin: 14px 0 0; font-size: 13px; line-height: 1.8; color: var(--ink-2); }
.first-sentence {
  margin: 0 0 4px; padding: 2px 0 2px 16px;
  border-left: 2px solid var(--accent);
}
.first-text { margin: 8px 0 0; font: 400 17px/1.8 var(--serif); }
.first-sentence .text-btn { display: inline-block; margin-top: 10px; }

.answer-block { margin-top: 38px; }
.answer-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-bottom: 10px; border-bottom: 1px solid var(--rule);
}
.answer-head .tool-actions { margin-left: 0; }
.answer-block textarea {
  display: block; width: 100%; min-height: 260px;
  margin-top: 14px; padding: 16px 18px;
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  font: 16px/1.9 var(--serif);
  resize: vertical;
}
.answer-block textarea::placeholder { color: var(--ink-3); }
.answer-block textarea:focus { outline: none; border-color: var(--accent); }
.answer-meta {
  display: flex; justify-content: space-between; gap: 16px;
  margin: 8px 0 0;
  font: 10.5px/1.5 var(--mono); color: var(--ink-3);
}
.answer-meta .is-target { color: var(--accent); }

.photo-empty { margin: 14px 0 0; font-size: 13px; color: var(--ink-3); }
.photo-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px; margin-top: 14px;
}
.photo-item {
  position: relative; aspect-ratio: 3 / 4; overflow: hidden;
  background: var(--paper-raised);
  border: 1px solid var(--rule-strong);
}
.photo-item img {
  display: block; width: 100%; height: 100%;
  object-fit: contain; cursor: zoom-in;
}
.photo-del {
  position: absolute; top: 0; right: 0;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: rgba(20, 22, 17, 0.72);
  color: #fff; border: 0; cursor: pointer;
  font: 14px/1 var(--sans);
}
.photo-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.photo-note { margin: 10px 0 0; font-size: 11.5px; line-height: 1.7; color: var(--ink-3); }

.reference {
  margin-top: 42px; padding-top: 16px;
  border-top: 1px solid var(--ink);
}
.ref-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.ref-actions { display: flex; gap: 8px; }
.btn[aria-pressed="true"] { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.ref-hint, .ref-body { margin-top: 16px; }
.ref-hint .block-label, .ref-body .block-label { margin-bottom: 8px; }
.ref-body { font: 15px/1.95 var(--serif); color: var(--ink-2); }
.ref-body p { margin: 0 0 12px; }
.ref-body p:last-child { margin-bottom: 0; }
.pair-list { margin: 0; }
.pair {
  display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 18px; padding: 9px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 13.5px; line-height: 1.7;
}
.pair:last-child { border-bottom: 0; }
.pair dt { color: var(--ink); }
.pair dd { margin: 0; color: var(--ink-2); }
.pair-en { font-family: var(--serif); font-style: italic; }

.practice-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 34px; padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.btn-primary[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.photo-dialog {
  width: min(880px, calc(100vw - 32px));
  max-height: calc(100dvh - 32px);
  margin: auto; padding: 12px;
  background: var(--paper); color: var(--ink);
  border: 1px solid var(--ink);
}
.photo-dialog::backdrop { background: rgba(20, 22, 17, 0.72); }
.photo-dialog img {
  display: block; max-width: 100%;
  max-height: calc(100dvh - 140px);
  margin: 0 auto; object-fit: contain;
}
.photo-dialog-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 10px;
  font: 10.5px/1.5 var(--mono); color: var(--ink-3);
}

/* ---------- wall ---------- */
.wall-meta-line {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  margin-top: 4px;
}
.wall-meta-line .match-line { margin-top: 8px; }
.wall-meta-actions { display: flex; align-items: baseline; flex-shrink: 0; gap: 16px; }
.wall-meta-actions .text-btn { margin-top: 8px; }

.wall {
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: 0 18px;
  padding: 12px 0 26px;
}
.wall.is-hiding-known .wall-word.is-known { display: none; }
.wall-word.is-group-start { margin-left: 10px; }
.wall-word.is-group-start:first-child { margin-left: 0; }

.wall-word {
  appearance: none;
  margin: 0; padding: 6px 0 7px;
  background: none; border: 0; border-bottom: 1px solid transparent;
  color: var(--ink);
  font: 400 21px/1.25 var(--serif);
  letter-spacing: -0.004em;
  cursor: pointer;
  transition: color 0.12s ease, opacity 0.12s ease, background 0.12s ease, border-color 0.12s ease;
  -webkit-tap-highlight-color: transparent;
}
.wall-word:hover {
  background: var(--mark);
  border-bottom-color: var(--rule-strong);
}
.wall-word:active { transform: translateY(1px); }
.wall-word.is-known { color: var(--rule-strong); opacity: 0.62; }
.wall-word.is-known:hover { color: var(--ink-2); opacity: 1; }
.wall-word.is-uncertain {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.wall-word.is-uncertain:hover { background: var(--accent-soft); }
.wall-word.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  border-bottom-color: var(--accent);
  opacity: 1;
}

.wall-legend {
  display: flex; align-items: center; flex-wrap: wrap; gap: 16px;
  margin: 4px 0 0;
  font: 10.5px/1.9 var(--mono);
  color: var(--ink-2);
}
.wall-note-touch { display: none; }
.legend-item.is-known { color: var(--ink-3); opacity: 0.7; }
.legend-item.is-uncertain { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.chip-num { margin-left: 3px; font: 10px/1 var(--mono); color: var(--ink-3); }
.chip[aria-pressed="true"] .chip-num { color: var(--accent); }

.wall-tip {
  position: fixed; z-index: 70;
  max-width: min(320px, calc(100vw - 24px));
  padding: 10px 12px;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 var(--rule);
  pointer-events: none;
}
.wall-tip-word { margin: 0; font: 400 18px/1.2 var(--serif); }
.wall-tip-meaning {
  margin-top: 5px;
  font: 13px/1.7 var(--serif);
  color: var(--ink-2);
}
.wall-tip-meaning .sense { display: block; }
.wall-tip-meaning .pos { color: var(--ink-3); font-family: var(--mono); font-size: 10px; }

.wall-card {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 55;
  padding: 16px 24px calc(16px + env(safe-area-inset-bottom));
  background: var(--paper);
  border-top: 1px solid var(--ink);
  animation: cardup 0.18s ease;
}
@keyframes cardup {
  from { transform: translateY(14px); }
}
.wall-card-inner { max-width: 772px; margin: 0 auto; }
.wall-card-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 20px;
}
.wall-card-state {
  margin: 0; font: 10px/1.4 var(--mono);
  letter-spacing: 0.14em; color: var(--ink-3);
}
.wall-card-word {
  margin: 4px 0 0;
  font: 400 27px/1.15 var(--serif);
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}
.wall-card-meaning {
  max-height: 26vh; overflow: auto;
  margin-top: 7px;
  font: 14px/1.8 var(--serif);
  color: var(--ink-2);
}
.wall-card-meaning .sense { display: block; }
.wall-card-meaning .pos { margin-right: 6px; color: var(--ink-3); font: 10px/1 var(--mono); }
.wall-card-actions {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  margin-top: 13px;
}
.wall-card-actions .text-btn { margin-right: auto; }

/* Fullscreen wall: the section leaves .stage, so it gets its own gutter. */
#view-wall:fullscreen {
  height: 100%;
  padding: 28px clamp(18px, 3.2vw, 54px) 90px;
  background: var(--paper);
  overflow-y: auto;
  overscroll-behavior: contain;
}
#view-wall:fullscreen .wall { padding-bottom: 40px; }
#view-wall:fullscreen .wall-card {
  bottom: 0;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
}

/* Fallback for browsers/iframes that refuse the Fullscreen API. */
body.wall-wide .topbar,
body.wall-wide .tabbar { display: none; }
body.wall-wide .stage { max-width: none; padding: 0 clamp(18px, 3.2vw, 54px); }
body.wall-wide .view { padding-top: 28px; }
body.wall-wide .wall-card {
  bottom: 0;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
}

/* ---------- tabbar ---------- */
.tabbar { display: none; }

/* ---------- shortcut dialog ---------- */
.shortcut-dialog {
  width: min(460px, calc(100vw - 36px));
  max-height: calc(100dvh - 48px);
  margin: auto;
  padding: 22px 24px 20px;
  overflow: auto;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
}
.shortcut-dialog::backdrop { background: rgba(20, 22, 17, 0.46); }
.shortcut-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  padding-bottom: 12px; border-bottom: 1px solid var(--ink);
}
.shortcut-head h2 { margin: 0; font: 400 24px/1.2 var(--serif); }
.help-group { margin: 18px 0 8px; font: 10px/1.5 var(--mono); letter-spacing: 0.14em; color: var(--ink-3); }
.shortcut-list { display: grid; gap: 9px; margin: 0; }
.shortcut-list div { display: grid; grid-template-columns: 118px minmax(0, 1fr); gap: 12px; align-items: baseline; }
.shortcut-list dt { display: flex; flex-wrap: wrap; gap: 4px; }
.shortcut-list dd { margin: 0; color: var(--ink-2); font-size: 13px; }
kbd {
  padding: 3px 5px;
  border: 1px solid var(--rule-strong);
  background: var(--paper-raised);
  color: var(--ink);
  font: 11px/1 var(--mono);
}
.shortcut-note { margin: 20px 0 0; color: var(--ink-3); font-size: 11.5px; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 60;
  display: flex; align-items: center; gap: 18px;
  max-width: calc(100vw - 36px);
  padding: 11px 15px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  opacity: 0; pointer-events: none;
  transform: translate(-50%, 14px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.toast.show { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.toast button {
  padding: 0; background: none; border: 0; cursor: pointer;
  color: inherit; font: inherit;
  text-decoration: underline; text-underline-offset: 3px;
}

/* ---------- responsive ---------- */
@media (max-width: 767px) {
  .topbar-inner { height: 58px; padding: 0 18px; gap: 12px; }
  .head-tabs { display: none; }
  .brand-sub { font-size: 9px; }
  .theme-btn { margin-left: auto; }
  .help-btn { display: none; }
  .stage { padding: 0 18px; }
  .view { padding: 34px 0 110px; }
  .page-head { padding-bottom: 15px; flex-wrap: wrap; }
  .page-title { font-size: 29px; }
  .count-line { display: none; }
  .copy-actions { flex: 1 1 100%; justify-content: flex-start; margin-top: 12px; }
  .toolbar { gap: 12px; }
  .search { flex: 1 1 100%; max-width: none; }
  .tool-actions { margin-left: 0; }
  .wall { gap: 0 14px; padding-top: 8px; }
  .wall-word { font-size: 18px; padding: 7px 0 8px; }
  .wall-word.is-group-start { margin-left: 8px; }
  .wall-meta-actions { gap: 12px; }
  .wall-legend { font-size: 10px; gap: 4px; }
  .wall-toolbar .tool-actions { flex-wrap: wrap; }
  .wall-card {
    bottom: calc(40px + env(safe-area-inset-bottom));
    padding: 14px 18px;
  }
  .wall-card-word { font-size: 24px; }
  .wall-card-meaning { max-height: 24vh; font-size: 13.5px; }
  .wall-card-actions .btn { flex: 1 1 auto; padding-top: 12px; padding-bottom: 12px; }
  .entry { grid-template-columns: 26px minmax(0, 1fr) 42px; gap: 9px; }
  .entry-word { font-size: 23px; }
  .entry-index { padding-top: 4px; font-size: 9px; }
  .entry-meaning { font-size: 14px; }
  .known-btn { width: 40px; height: 38px; }
  .focus-stage { min-height: calc(100dvh - 210px); padding: 24px 0 40px; }
  .focus-word { font-size: clamp(38px, 12vw, 60px); }
  .focus-meaning { font-size: 16.5px; }
  .focus-actions { margin-top: 34px; }
  .key-hint { display: none; }
  .copy-foot { align-items: flex-start; flex-direction: column; gap: 10px; }
  .today-card { margin-top: 20px; padding: 18px 16px 16px; }
  .today-title { font-size: 23px; }
  .write-row { grid-template-columns: 24px minmax(0, 1fr) auto; gap: 10px; }
  .write-row-title { font-size: 17px; }
  .write-row-preview { font-size: 11.5px; }
  .write-total { display: block; }
  .practice { padding-top: 20px; }
  .practice-title { font-size: 25px; }
  .prompt-text { font-size: 16px; line-height: 1.9; }
  .answer-block { margin-top: 30px; }
  .answer-block textarea { min-height: 220px; padding: 14px; font-size: 16px; }
  .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pair { grid-template-columns: 1fr; gap: 2px; }
  .practice-foot { flex-direction: column-reverse; align-items: stretch; gap: 14px; }
  .practice-foot .btn { width: 100%; }
  .practice-foot .text-btn { align-self: center; }
  .tabbar {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--paper);
    border-top: 1px solid var(--rule);
  }
  .tabbar .tab {
    display: flex; align-items: center; justify-content: center; gap: 5px;
    padding: 13px 0 12px;
    background: none; border: 0;
    border-top: 2px solid transparent;
    color: var(--ink-3);
    font: 12px/1 var(--sans);
  }
  .tabbar .tab[aria-selected="true"] { color: var(--accent); border-top-color: var(--accent); }
  .toast { bottom: calc(70px + env(safe-area-inset-bottom)); }
}

.tab-num { font: 10px/1 var(--mono); color: var(--ink-3); }
.tab[aria-selected="true"] .tab-num { color: var(--accent); }

@media (hover: none) {
  .key-hint, .search-key { display: none; }
  .wall-note-desktop { display: none; }
  .wall-note-touch { display: block; }
  .speak-chip { display: none; }
}

/* ---------- print ---------- */
@media print {
  @page { margin: 16mm; }
  body { background: #fff; color: #000; }
  .topbar, .tabbar, .toast, .page-head, .copy-actions, .copy-foot, .print-note { display: none !important; }
  .stage { max-width: none; padding: 0; }
  .view { display: none !important; padding: 0; }
  .view.is-active { display: block !important; }
  .print-only {
    display: flex; justify-content: space-between;
    padding-bottom: 8px;
    font-family: var(--sans); font-size: 11px; color: #444;
  }
  .sheet { margin-top: 10px; border-top: 2px solid #000; }
  .sheet-row { padding: 12px 0 11px; border-bottom: 1px solid #ccc; }
  .sheet-num { color: #555; }
  .sheet-word { font-size: 19px; }
  .sheet-meaning { font-size: 12px; color: #333; }
  .credit { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}