/* =====================================================================
   Lingua Mundi GUI — lightweight, mobile-first, no framework.
   Palette (solid colors only, no gradients):
     --primary   #004070   deep brand blue
     --accent    #0060a0   brighter interactive blue
     --ink       #101418   near-black text
     --bg        #f5f6f8   page background
   =================================================================== */

:root {
  --primary: #004070;
  --accent: #0060a0;
  --accent-soft: #e7f1f9;
  --ink: #101418;
  --ink-soft: #4a5560;
  --ink-faint: #7c8791;
  --bg: #f5f6f8;
  --card: #ffffff;
  --line: #dde3e8;
  --line-strong: #c2ccd4;
  --ok: #1c7c3c;
  --warn: #9a5b00;
  --offline: #7a1f3d;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 20, 24, 0.06), 0 4px 14px rgba(16, 20, 24, 0.05);
  --jp-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP",
             "Yu Gothic UI", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  --jp-serif: "Hiragino Mincho ProN", "Noto Serif JP", "Yu Mincho", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------- top bar -------------------------- */
.topbar {
  background: var(--primary);
  color: #fff;
  padding: 14px 16px 12px;
}

.topbar-inner {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  flex: none;
  background: #fff;
  color: var(--primary);
  font-family: var(--jp-serif);
  font-size: 24px;
  font-weight: 700;
  border-radius: 10px;
}

.brand-text h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand-text p {
  margin: 1px 0 0;
  font-size: 11.5px;
  opacity: 0.82;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lang-field select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  padding: 8px 26px 8px 12px;
  font: inherit;
  font-size: 14px;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23ffffff' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
}

.lang-field select option { color: var(--ink); background: #fff; }

/* ------------------------------ layout ---------------------------- */
.app {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px 14px 48px;
}

/* ------------------------------ search ---------------------------- */
.search-zone { position: relative; margin-bottom: 18px; }

.searchbox-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0 12px;
  box-shadow: var(--shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.searchbox-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 96, 160, 0.18), var(--shadow);
}

.search-icon { color: var(--ink-faint); flex: none; }

#search {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font: inherit;
  font-size: 17px;
  padding: 14px 0;
  color: var(--ink);
}

#search::placeholder { color: var(--ink-faint); }

#search::-webkit-search-cancel-button { display: none; }

.icon-btn {
  flex: none;
  border: 0;
  background: var(--bg);
  color: var(--ink-soft);
  width: 28px; height: 28px;
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.icon-btn:hover { background: var(--line); color: var(--ink); }

/* typeahead dropdown */
.suggestions {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(16, 20, 24, 0.14);
  z-index: 30;
  max-height: 320px;
  overflow-y: auto;
}

.suggestion {
  display: grid;
  grid-template-columns: auto auto auto 1fr;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.suggestion.active { background: var(--accent-soft); }

.sug-lemma {
  font-family: var(--jp-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
}

.sug-furigana { font-size: 14px; color: var(--ink-soft); }

.sug-pos {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 5px;
  padding: 2px 6px;
}

.sug-sense {
  font-size: 13.5px;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: right;
}

/* status banner */
.status {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
}

.status.offline { background: #fbe9ef; color: var(--offline); border: 1px solid #f0c2d2; }
.status.warn    { background: #fdf3e3; color: var(--warn);    border: 1px solid #f0dcb4; }

/* ------------------------------ detail ---------------------------- */
.detail { animation: fadein 0.18s ease; }

@keyframes fadein {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: none; }
}

.word-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.word-header {
  background: var(--primary);
  color: #fff;
  padding: 20px 20px 18px;
}

.lemma {
  margin: 0 0 6px;
  font-family: var(--jp-serif);
  font-size: clamp(30px, 8vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
}

.lemma ruby { ruby-align: center; }
.lemma rt {
  font-family: var(--jp-sans);
  font-size: 0.45em;
  font-weight: 500;
  color: #cfe4f4;
}

.lemma .kana-alt {
  font-family: var(--jp-sans);
  font-size: 0.55em;
  font-weight: 500;
  color: #cfe4f4;
  margin-left: 8px;
}

.word-meta {
  margin: 0;
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.pos {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 3px 9px;
  border-radius: 999px;
}

.lang-tag {
  font-size: 12px;
  font-family: var(--jp-sans);
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 3px 9px;
  border-radius: 999px;
}

.inflected-note {
  margin: 0;
  padding: 10px 20px;
  background: var(--accent-soft);
  border-bottom: 1px solid var(--line);
  color: var(--primary);
  font-size: 14.5px;
}

.card {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.card:last-of-type { border-bottom: 0; }

.card h3 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

/* senses */
.senses {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sense {
  display: flex;
  gap: 12px;
  padding: 9px 0;
}

.sense + .sense { border-top: 1px dashed var(--line); }

.sense-num {
  flex: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
  margin-top: 1px;
}

.sense-body { min-width: 0; }

.sense-def { margin: 0; font-size: 16px; }

.sense-pos {
  margin: 3px 0 0;
  font-size: 12.5px;
  color: var(--accent);
  font-weight: 600;
}

.sense-concept {
  margin: 3px 0 0;
  font-size: 12px;
  color: var(--ink-faint);
}

.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 11px; }

/* readings */
.readings, .inflections, .sources { display: flex; flex-wrap: wrap; gap: 8px; }

.reading {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
}

.reading-text { font-family: var(--jp-sans); font-size: 15px; font-weight: 600; }

.reading-type {
  font-size: 11px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.star { color: var(--warn); font-size: 12px; }

/* inflections */
.inflection {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: var(--accent-soft);
  color: var(--primary);
  border: 1px solid #c9e0f0;
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-family: var(--jp-sans);
  font-size: 14.5px;
  font-weight: 600;
}

.feat {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 10.5px;
  color: var(--accent);
  font-weight: 500;
}

/* kanji breakdown */
.kanji-grid {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}

.kanji-char {
  display: grid;
  place-items: center;
  width: 76px; height: 76px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--jp-serif);
  font-size: 46px;
  color: var(--primary);
}

.kanji-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(90px, auto));
  gap: 6px 22px;
}

.kanji-stats div { display: flex; flex-direction: column; }

.kanji-stats dt {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.kanji-stats dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

/* sources */
.source {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 11px;
}

/* footer of word card */
.word-footer {
  padding: 14px 20px;
  background: var(--bg);
  border-top: 1px solid var(--line);
}

.btn-secondary {
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  cursor: pointer;
}

.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ------------------------------- idle ------------------------------ */
.idle { padding: 26px 0 10px; }

.idle-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 34px 22px;
  text-align: center;
}

.idle-glyph { margin: 0 0 6px; font-size: 34px; }

.idle h2 { margin: 0 0 8px; font-size: 20px; color: var(--primary); }

.idle p { margin: 6px 0; color: var(--ink-soft); }

.idle-hint { font-size: 13.5px; color: var(--ink-faint); }

kbd {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 11px;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--ink-soft);
}

.chip-btn {
  font: inherit;
  font-family: var(--jp-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  background: var(--accent-soft);
  border: 1px solid #c9e0f0;
  border-radius: 999px;
  padding: 5px 14px;
  margin: 3px;
  cursor: pointer;
}

.chip-btn:hover { background: #d3e7f5; }

/* ------------------------------ footer ----------------------------- */
.footer {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 14px 28px;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-faint);
}

.footer code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--line);
  border-radius: 4px;
  padding: 1px 5px;
}

/* --------------------------- responsiveness ------------------------ */
@media (min-width: 720px) {
  .app { padding-top: 28px; }
  .topbar { padding-top: 16px; padding-bottom: 16px; }
  .word-header { padding: 26px 28px 22px; }
  .card { padding: 18px 28px; }
  .word-footer { padding: 16px 28px; }
  .sug-sense { max-width: 340px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ------------------------------------------------------------------ */
/* Icon-driven chrome (2026-08-30): language toggle buttons + help     */
/* ------------------------------------------------------------------ */
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.lang-toggle { display: inline-flex; border: 1px solid #c9d4de; border-radius: 8px; overflow: hidden; }
.lang-btn {
  border: none; background: #fff; color: #3c4650;
  font: inherit; font-size: 0.85rem; font-weight: 600;
  padding: 6px 12px; cursor: pointer; letter-spacing: 0.02em;
}
.lang-btn + .lang-btn { border-left: 1px solid #c9d4de; }
.lang-btn.active { background: #004070; color: #fff; }
.lang-btn:focus-visible { outline: 2px solid #0060a0; outline-offset: 1px; }
.icon-btn { background: transparent; border: none; color: #3c4650; cursor: pointer; padding: 6px; border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; }
.icon-btn:hover { background: #e9eff5; }
.icon-btn:focus-visible { outline: 2px solid #0060a0; outline-offset: 1px; }

.help-panel {
  position: fixed; inset: 0; background: rgba(16, 20, 24, 0.45);
  display: flex; align-items: center; justify-content: center; z-index: 40; padding: 20px;
}
.help-panel[hidden] { display: none !important; }

.help-inner {
  background: #fff; border-radius: 12px; max-width: 520px; width: 100%;
  padding: 24px 26px 26px; box-shadow: 0 12px 40px rgba(16, 20, 24, 0.25);
  position: relative; max-height: 86vh; overflow-y: auto;
}
.help-inner .icon-btn { position: absolute; top: 12px; right: 12px; }
.help-inner h2 { color: #004070; margin: 0 0 14px; font-size: 1.15rem; }
.help-steps { margin: 0 0 14px; padding-left: 22px; line-height: 1.65; color: #2a3038; }
.help-steps kbd { background: #eef2f6; border: 1px solid #d4dce4; border-radius: 4px; padding: 1px 6px; font: inherit; font-size: 0.85em; }
.help-note { color: #5b6472; font-size: 0.92rem; margin: 0; }