:root {
  --indigo: #2d3a8c;
  --indigo-dark: #222c6a;
  --vermilion: #d94c3f;
  --ink: #1a1a1a;
  --paper: #fefefe;
  --subtle: #f3f2ee;
  --border: #e3e0d8;
  --max: 72rem;
}
*, *::before, *::after { box-sizing: border-box; }
html { font: 16px/1.6 system-ui, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--paper); }
body { margin: 0; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
a { color: var(--indigo); text-decoration: none; }
a:hover { color: var(--vermilion); }

.site-header { background: var(--paper); border-bottom: 1px solid var(--border); padding: .75rem 0; position: sticky; top: 0; z-index: 10; }
.site-header .inner { display: flex; align-items: center; gap: 1rem; justify-content: space-between; }
.site-header .brand { font-weight: 700; font-size: 1.1rem; color: var(--indigo); }

.hero-search { display: flex; align-items: center; gap: .5rem; flex: 1; max-width: 32rem; position: relative; }
.hero-search input { flex: 1; padding: .55rem .8rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; }
.hero-search input:focus { outline: 2px solid var(--indigo); outline-offset: 0; }
.hero-search .hero-suffix { color: #666; font-style: italic; }
.hero-search button { padding: .55rem 1rem; background: var(--indigo); color: #fff; border: 0; border-radius: 6px; font: inherit; cursor: pointer; }
.hero-search button:hover { background: var(--indigo-dark); }

.site-footer { border-top: 1px solid var(--border); margin-top: 4rem; padding: 2rem 0; color: #666; font-size: .9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .75rem 1rem; }
.footer-links a { color: #555; }
.footer-links a:hover { color: var(--vermilion); }

.hero { padding: 4rem 0 3rem; text-align: center; }
.hero h1 { font-size: 2.4rem; margin: 0 0 .5rem; }
.hero p { color: #666; font-size: 1.1rem; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 2rem 0; }
.cat-card { padding: 1.5rem; border: 1px solid var(--border); border-radius: 8px; background: var(--subtle); }
.cat-card h2 { margin-top: 0; color: var(--indigo); }

.atoz-nav { display: flex; flex-wrap: wrap; gap: .35rem; margin: 1rem 0 1.5rem; }
.atoz-nav a { padding: .25rem .55rem; border: 1px solid var(--border); border-radius: 4px; background: #fff; text-transform: uppercase; font-size: .9rem; }
.atoz-nav a.is-active { background: var(--indigo); color: #fff; border-color: var(--indigo); }

.cat-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.cat-toggle a { padding: .25rem .75rem; font-size: .9rem; background: #fff; }
.cat-toggle a.is-active { background: var(--indigo); color: #fff; }

.expr-list { list-style: none; padding: 0; margin: 1rem 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr)); gap: .75rem; }
.expr-card { padding: .8rem 1rem; border: 1px solid var(--border); border-radius: 6px; background: #fff; }
.expr-card .expr-en { font-weight: 600; color: var(--indigo); }
.expr-card .expr-jp { margin-top: .15rem; color: var(--ink); font-size: 1.05rem; }
.expr-card .expr-romaji { color: #888; font-size: .85rem; }

.article-title { font-size: 2rem; margin: 1.5rem 0 .25rem; }
.article-subline { color: #666; margin: 0 0 1.5rem; }
.meta-row { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0; }
.meta-chip { padding: .3rem .7rem; border: 1px solid var(--border); border-radius: 999px; background: var(--subtle); font-size: .9rem; }
.answer-card { display: grid; grid-template-columns: minmax(14rem, 1fr) minmax(18rem, 1.25fr); gap: 1.25rem; padding: 1.25rem; border: 1px solid var(--border); border-radius: 8px; background: #fff; box-shadow: 0 1px 0 rgba(0,0,0,.03); margin: 1.25rem 0 1.5rem; }
.answer-label { color: #666; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0; }
.answer-jp { display: inline-flex; align-items: center; gap: .45rem; margin-top: .2rem; font-size: 2rem; line-height: 1.25; }
.answer-romaji { color: #666; font-size: 1rem; margin-top: .2rem; }
.answer-main p { margin: .75rem 0 0; color: #444; }
.answer-facts { display: grid; gap: .75rem; margin: 0; }
.answer-facts div { display: grid; grid-template-columns: 8.5rem minmax(0, 1fr); gap: .75rem; align-items: start; padding-bottom: .75rem; border-bottom: 1px solid var(--subtle); }
.answer-facts div:last-child { border-bottom: 0; padding-bottom: 0; }
.answer-facts dt { color: #666; font-size: .85rem; font-weight: 700; }
.answer-facts dd { margin: 0; min-width: 0; }
.quick-answer { padding: 1.25rem; border-left: 4px solid var(--vermilion); background: var(--subtle); margin: 1.5rem 0; }
.quick-answer .qa-group { margin: .5rem 0; }
.quick-answer .qa-jp { font-size: 1.6rem; display: inline-flex; align-items: center; gap: .4rem; }
.quick-answer .qa-rendering { margin: .5rem 0 1rem; }

.tts-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.8rem; height: 1.8rem; padding: 0;
  border: 1px solid var(--border); border-radius: 999px;
  background: #fff; color: var(--indigo);
  cursor: pointer; transition: background .15s, color .15s, border-color .15s;
  vertical-align: middle;
}
.tts-btn:hover      { background: var(--indigo); color: #fff; border-color: var(--indigo); }
.tts-btn:disabled   { opacity: .5; cursor: wait; }
.tts-btn.is-playing { background: var(--vermilion); color: #fff; border-color: var(--vermilion); }
.tts-btn svg        { display: block; }

.examples { width: 100%; border-collapse: collapse; margin: .75rem 0 1.5rem; table-layout: fixed; }
.examples th,
.examples td { padding: .7rem .8rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.examples th { background: var(--subtle); color: #444; font-size: .9rem; font-weight: 700; }
.examples tbody tr:hover { background: #fafafa; }
.examples th:nth-child(1),
.examples td:nth-child(1) { width: 28%; }
.examples th:nth-child(2),
.examples td:nth-child(2) { width: 28%; }
.examples td[lang="ja"] { line-height: 1.9; }
.examples td[lang="ja"] span { margin-right: .4rem; }

/* Inline TTS inside body prose */
.jp-inline { display: inline-flex; align-items: center; gap: .25rem; vertical-align: baseline; white-space: nowrap; }
.jp-inline > span[lang="ja"] { font-weight: 500; }
.tts-btn--inline { width: 1.3rem; height: 1.3rem; border-color: transparent; color: var(--indigo); background: transparent; }
.tts-btn--inline:hover { background: var(--indigo); color: #fff; border-color: var(--indigo); }
.tts-btn--inline svg { width: 12px; height: 12px; }

/* FAQ always-open */
.faq-open .faq-item   { margin: 1.2rem 0; padding-bottom: 1rem; border-bottom: 1px solid var(--subtle); }
.faq-open .faq-item:last-child { border-bottom: 0; }
.faq-open .faq-q      { font-size: 1.05rem; margin: 0 0 .35rem; color: var(--indigo); }
.faq-open .faq-a p    { margin: 0; }

.suggest-box { position: absolute; top: 100%; left: 0; right: 0; background: #fff; border: 1px solid var(--border); border-top: 0; border-radius: 0 0 6px 6px; max-height: 20rem; overflow-y: auto; display: none; z-index: 20; }
.suggest-box.is-open { display: block; }
.suggest-item { display: block; padding: .5rem .8rem; border-bottom: 1px solid var(--subtle); }
.suggest-item:last-child { border-bottom: 0; }
.suggest-item:hover, .suggest-item.is-active { background: var(--subtle); }
.suggest-en { font-weight: 600; }
.suggest-jp { color: #555; font-size: .9rem; }

.basic-page { max-width: 52rem; margin: 2rem 0; }
.contact-form { display: grid; gap: 1rem; max-width: 42rem; margin-top: 1.25rem; }
.contact-form label { display: grid; gap: .35rem; font-weight: 700; }
.contact-form input,
.contact-form textarea { width: 100%; padding: .65rem .75rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; font-weight: 400; }
.contact-form input:focus,
.contact-form textarea:focus { outline: 2px solid var(--indigo); outline-offset: 0; }
.contact-form button { justify-self: start; padding: .6rem 1rem; background: var(--indigo); color: #fff; border: 0; border-radius: 6px; font: inherit; cursor: pointer; }
.contact-form button:hover { background: var(--indigo-dark); }
.notice { padding: .75rem 1rem; border-radius: 6px; border: 1px solid var(--border); }
.notice-success { background: #f0f8f2; }
.notice-error { background: #fff4f2; }
.lwsf-form,
.lwsf-form-back { max-width: 42rem; }
.lwsf-form h2,
.lwsf-form-back h2 { font-size: 1rem; margin: 1rem 0 .35rem; }
.lwsf-form .must { color: var(--vermilion); margin-left: .2rem; }
.lwsf-form .inpt,
.lwsf-form-back .inpt { margin: .25rem 0 .75rem; }
.lwsf-form input[type="text"],
.lwsf-form input[type="email"],
.lwsf-form textarea { width: 100%; max-width: 100%; padding: .65rem .75rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; }
.lwsf-form input:focus,
.lwsf-form textarea:focus { outline: 2px solid var(--indigo); outline-offset: 0; }
.lwsf-form button,
.lwsf-form-back button,
.lwsf-confirm-buttons button { padding: .6rem 1rem; border: 0; border-radius: 6px; background: var(--indigo); color: #fff; font: inherit; cursor: pointer; }
.lwsf-form button:hover,
.lwsf-form-back button:hover,
.lwsf-confirm-buttons button:hover { background: var(--indigo-dark); }
.lwsf-form-back button { background: #fff; color: var(--indigo); border: 1px solid var(--border); }
.lwsf-form-back button:hover { color: #fff; border-color: var(--indigo-dark); }
.lwsf-confirm-buttons { display: flex; gap: .75rem; align-items: center; margin-top: 1rem; }

@media (max-width: 640px) {
  .site-header .inner { flex-direction: column; align-items: stretch; }
  .hero-search { max-width: none; }
  .hero-search .hero-suffix { display: none; }
  .answer-card { grid-template-columns: 1fr; padding: 1rem; }
  .answer-jp { font-size: 1.7rem; }
  .answer-facts div { grid-template-columns: 1fr; gap: .2rem; }
  .examples { display: block; overflow-x: auto; }
}