:root {
  --ink: #0F2347;
  --ink-2: #1D3563;
  --red: #C8102E;
  --paper: #FFFFFF;
  --mist: #EEF2F7;
  --line: #D5DCE6;
  --muted: #56667F;
  --good: #17784A;
  --warn: #9A5B00;
  --board: #0F2347;
  --board-text: #F3F6FB;
  --board-dim: #9FB0CC;
  --display: "Archivo", "Arial Narrow", Arial, sans-serif;
  --body: "Mukta", "Segoe UI", Arial, sans-serif;
  --radius: 6px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.55;
}
img { max-width: 100%; display: block; }
a { color: var(--ink); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--red); outline-offset: 2px; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--paper); padding: 8px 12px; z-index: 10; }
.loading { padding: 64px 0; color: var(--muted); }

/* Header */
.top { border-bottom: 1px solid var(--line); background: var(--paper); position: sticky; top: 0; z-index: 5; }
.top-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; text-decoration: none; font-family: var(--display); font-weight: 800; font-size: 26px; letter-spacing: -0.02em; }
.logo-word { color: var(--ink); }
.logo-tag {
  margin-left: 4px; color: #fff; background: var(--red); font-size: 18px; line-height: 1;
  padding: 5px 14px 5px 8px;
  clip-path: polygon(0 0, 78% 0, 100% 50%, 78% 100%, 0 100%);
}
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { text-decoration: none; font-weight: 600; padding: 6px 10px; border-radius: var(--radius); color: var(--ink-2); }
.nav a:hover { background: var(--mist); }
.nav a[aria-current="page"] { background: var(--ink); color: #fff; }

/* Rate board hero */
.hero { padding: 40px 0 8px; }
.hero h1 {
  font-family: var(--display); font-stretch: 80%; font-weight: 800;
  font-size: clamp(34px, 6vw, 56px); line-height: 1.02; letter-spacing: -0.02em;
  margin: 0 0 12px; max-width: 18ch;
}
.hero p.lede { margin: 0 0 28px; max-width: 60ch; color: var(--muted); font-size: 18px; }

.board { background: var(--board); color: var(--board-text); border-radius: 10px; padding: 20px 20px 8px; }
.board-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; border-bottom: 1px solid #2D4777; padding-bottom: 12px; }
.board-title { font-family: var(--display); font-weight: 700; font-size: 20px; margin: 0; }
.board-title .np { font-family: var(--body); font-weight: 600; margin-right: 8px; }
.board-date { color: var(--board-dim); font-size: 15px; }
.board-rows { list-style: none; margin: 0; padding: 0; }
.board-row { display: grid; grid-template-columns: 120px 1fr auto; gap: 16px; align-items: center; padding: 14px 0; border-bottom: 1px dashed #2D4777; }
.board-row:last-child { border-bottom: 0; }
.board-cat { font-weight: 700; font-size: 17px; }
.board-cat a { color: var(--board-text); text-decoration: none; }
.board-cat a:hover { text-decoration: underline; }
.board-item { color: var(--board-dim); font-size: 15px; line-height: 1.3; min-width: 0; }
.board-item b { color: var(--board-text); font-weight: 600; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board-rate { font-family: var(--display); font-weight: 800; font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.board-rate .num { font-size: 32px; color: #fff; }
.board-rate .unit { font-size: 14px; color: var(--board-dim); font-weight: 600; display: block; margin-top: -4px; }
.board-empty { color: var(--board-dim); font-size: 15px; }

/* Sections */
.section { padding: 40px 0 8px; }
.section h2 { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 30px; margin: 0 0 6px; letter-spacing: -0.01em; }
.section .sub { color: var(--muted); margin: 0 0 20px; max-width: 64ch; }
.crumbs { font-size: 15px; color: var(--muted); padding-top: 24px; }
.crumbs a { color: var(--muted); }

/* Filter chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 16px; }
.chip { font: inherit; font-weight: 600; font-size: 15px; border: 1px solid var(--line); background: var(--paper); color: var(--ink-2); padding: 6px 14px; border-radius: 999px; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; }

/* Ranking list */
.rank { list-style: none; margin: 0; padding: 0; border-top: 2px solid var(--ink); }
.rank-row { display: grid; grid-template-columns: 40px 64px 1fr auto; gap: 16px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.rank-pos { font-family: var(--display); font-weight: 800; font-size: 22px; color: var(--muted); text-align: center; font-variant-numeric: tabular-nums; }
.rank-row:first-child .rank-pos { color: var(--red); }
.thumb { width: 64px; height: 64px; border-radius: var(--radius); background: var(--mist); object-fit: contain; }
.thumb-empty { display: grid; place-items: center; color: var(--muted); font-family: var(--display); font-weight: 800; font-size: 20px; }
.rank-main { min-width: 0; }
.rank-brand { font-size: 14px; color: var(--muted); font-weight: 600; }
.rank-name { font-weight: 700; font-size: 18px; line-height: 1.25; }
.rank-name a { text-decoration: none; }
.rank-name a:hover { text-decoration: underline; }
.rank-meta { font-size: 14px; color: var(--muted); margin-top: 2px; }
.rank-right { text-align: right; }
.rate { font-family: var(--display); font-weight: 800; font-variant-numeric: tabular-nums; line-height: 1; }
.rate .num { font-size: 28px; }
.rate .unit { display: block; font-size: 13px; color: var(--muted); font-weight: 600; margin-top: 4px; }
.price { font-size: 15px; color: var(--ink-2); margin-top: 6px; font-variant-numeric: tabular-nums; }
.price s { color: var(--muted); margin-left: 6px; font-size: 13px; }
.shop-btn { display: inline-block; margin-top: 8px; font-weight: 700; font-size: 14px; background: var(--red); color: #fff; text-decoration: none; padding: 6px 12px; border-radius: var(--radius); }
.shop-btn:hover { background: #A50D25; }
.change { font-size: 13px; font-weight: 600; }
.change.down { color: var(--good); }
.change.up { color: var(--warn); }

.oos { margin-top: 24px; }
.oos summary { cursor: pointer; font-weight: 700; color: var(--ink-2); padding: 8px 0; }
.oos .rank-row { opacity: 0.7; }
.oos .rank { border-top-width: 1px; }
.tag-oos { display: inline-block; font-size: 12px; font-weight: 700; color: var(--warn); border: 1px solid currentColor; border-radius: 4px; padding: 0 6px; margin-left: 6px; vertical-align: 2px; }

.empty { padding: 24px; background: var(--mist); border-radius: var(--radius); color: var(--ink-2); }

/* Product page */
.prod { display: grid; grid-template-columns: 280px 1fr; gap: 32px; padding: 24px 0 8px; }
.prod-img { width: 100%; aspect-ratio: 1; background: var(--mist); border-radius: 10px; object-fit: contain; }
.prod h1 { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(28px, 4vw, 40px); line-height: 1.08; margin: 4px 0 16px; }
.prod .rate .num { font-size: 48px; }
.math { margin: 20px 0; padding: 16px; background: var(--mist); border-radius: var(--radius); font-variant-numeric: tabular-nums; }
.math table { border-collapse: collapse; width: 100%; }
.math td { padding: 4px 0; vertical-align: top; }
.math td:last-child { text-align: right; font-weight: 600; }
.math tr.total td { border-top: 1px solid var(--line); padding-top: 8px; font-weight: 800; }
.note { font-size: 14px; color: var(--muted); }

/* Guide */
.prose { max-width: 68ch; }
.prose h3 { font-family: var(--display); font-weight: 700; font-size: 21px; margin: 28px 0 6px; }
.prose p { margin: 0 0 12px; }
.formula { font-family: var(--display); font-weight: 700; background: var(--mist); padding: 12px 16px; border-left: 4px solid var(--red); border-radius: 0 var(--radius) var(--radius) 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 8px 0 0; color: var(--ink-2); }

/* Footer */
.foot { margin-top: 56px; border-top: 1px solid var(--line); background: var(--mist); }
.foot-inner { padding: 24px 16px; font-size: 15px; color: var(--ink-2); }
.foot-inner p { margin: 0 0 8px; max-width: 72ch; }
.foot-meta { color: var(--muted); font-size: 14px; }

@media (max-width: 720px) {
  body { font-size: 16px; }
  .board-row { grid-template-columns: 1fr auto; }
  .board-cat { grid-column: 1 / -1; font-size: 15px; margin-bottom: -10px; color: var(--board-dim); }
  .board-cat a { color: var(--board-dim); }
  .rank-row { grid-template-columns: 28px 52px 1fr; gap: 12px; }
  .thumb { width: 52px; height: 52px; }
  .rank-right { grid-column: 2 / -1; text-align: left; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; }
  .rank-right .rate .unit { display: inline; margin-left: 4px; }
  .rank-right .price, .rank-right .shop-btn { margin-top: 0; }
  .prod { grid-template-columns: 1fr; }
  .prod-img { max-width: 260px; }
}

@media (prefers-reduced-motion: no-preference) {
  .board-row { animation: flip 420ms ease-out both; }
  .board-row:nth-child(2) { animation-delay: 80ms; }
  .board-row:nth-child(3) { animation-delay: 160ms; }
  .board-row:nth-child(4) { animation-delay: 240ms; }
  @keyframes flip { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
}