/* =========================================================
   Gokan — base stylesheet
   Editorial × product catalog × almanac
   ========================================================= */

:root {
  /* Classic Editorial (default) */
  --bg:        #F6F2EA;
  --paper:    #FBF8F2;
  --ink:      #1A1915;
  --ink-2:    #3C3A33;
  --mute:     #86817A;
  --rule:     #1A1915;
  --hair:     rgba(26,25,21,0.18);
  --accent:   #C53A2B;   /* 朱 */
  --accent-2: #0E3B2E;   /* 深緑 */
  --amazon:   #E47911;
  --tag-bg:   #EFE9DD;
  --ok:       #3E6B4A;
  --warn:     #B26A1F;

  /* Typography */
  --serif: "Shippori Mincho", "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans:  "IBM Plex Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  --mono:  "JetBrains Mono", "Courier New", ui-monospace, monospace;

  --max: 1280px;
}

/* Variant: Catalog Grid */
[data-aesthetic="catalog"] {
  --bg:      #EDEDEA;
  --paper:   #FFFFFF;
  --ink:     #0A0A0A;
  --ink-2:   #2B2B2B;
  --mute:    #7A7A77;
  --rule:    #0A0A0A;
  --hair:    rgba(10,10,10,0.14);
  --accent:  #1745CC;
  --accent-2:#0A0A0A;
  --tag-bg:  #E4E4E0;
}

/* Variant: Almanac */
[data-aesthetic="almanac"] {
  --bg:      #E9DFC8;
  --paper:   #F2E9D3;
  --ink:     #2A1E10;
  --ink-2:   #4A3826;
  --mute:    #8B7A5F;
  --rule:    #2A1E10;
  --hair:    rgba(42,30,16,0.22);
  --accent:  #8B2A1A;
  --accent-2:#3F5736;
  --tag-bg:  #DECFA7;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a.link { border-bottom: 1px solid var(--hair); }
a.link:hover { border-bottom-color: var(--ink); }

button { font: inherit; cursor: pointer; }
img { max-width: 100%; display: block; }

.mono { font-family: var(--mono); }
.serif { font-family: var(--serif); }
.sans { font-family: var(--sans); }
.upper { text-transform: uppercase; letter-spacing: 0.08em; }

.page-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.rule    { border-top: 1px solid var(--ink); }
.hair    { border-top: 1px solid var(--hair); }
.rule-b  { border-bottom: 1px solid var(--ink); }
.hair-b  { border-bottom: 1px solid var(--hair); }

/* kicker / eyebrow */
.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* folio numbers like a magazine */
.folio {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

/* section number in huge serif */
.section-no {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

/* buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background .15s, color .15s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-solid { background: var(--ink); color: var(--paper); }
.btn-solid:hover { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.btn-amazon {
  background: var(--ink); color: var(--paper);
  border-color: var(--ink);
}
.btn-amazon:hover { background: var(--accent); border-color: var(--accent); }

/* tags / badges */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  white-space: nowrap;
}
.badge.solid { background: var(--ink); color: var(--paper); }
.badge.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.badge.ghost { border-color: var(--hair); color: var(--ink-2); }

/* tables */
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table.data th, table.data td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--hair);
  vertical-align: middle;
}
table.data th {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mute);
  font-weight: 400;
  border-bottom: 1px solid var(--ink);
  background: transparent;
}
table.data tr:last-child td { border-bottom: 1px solid var(--ink); }
table.data td.num { font-family: var(--mono); text-align: right; }
table.data tr:hover td { background: rgba(0,0,0,0.02); }

/* nav header */
.masthead {
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
}
.masthead-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 14px 0;
  gap: 20px;
}
.masthead .left, .masthead .right {
  display: flex; align-items: center; gap: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.masthead .right { justify-content: flex-end; }
.masthead .wordmark {
  font-family: var(--serif);
  font-size: 34px;
  letter-spacing: -0.01em;
  font-weight: 500;
  text-align: center;
}
.masthead .wordmark em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}
.masthead .tagline {
  text-align: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--mute);
  text-transform: uppercase;
  padding-bottom: 10px;
  border-bottom: 3px double var(--ink);
}

.masthead .nav-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-top: 1px solid var(--hair);
}
.masthead .nav-row a { padding: 4px 0; }
.masthead .nav-row a:hover { color: var(--accent); }

/* breadcrumb */
.crumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mute);
  padding: 14px 0;
  text-transform: uppercase;
}
.crumb .sep { margin: 0 8px; color: var(--hair); }
.crumb .cur { color: var(--ink); }

/* hero big number layout */
.hero-number {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  line-height: 0.88;
  letter-spacing: -0.03em;
}

/* data-source / trust line */
.source-line {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--mute);
  text-transform: uppercase;
}
.source-line::before { content: "↳ "; color: var(--accent); }

/* amazon inline */
.amzn {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amazon);
  letter-spacing: 0.04em;
}

/* placeholder image blocks (no fake product renders) */
.ph {
  background: repeating-linear-gradient(
    135deg,
    var(--tag-bg) 0 6px,
    transparent 6px 12px
  );
  border: 1px solid var(--hair);
  position: relative;
  overflow: hidden;
}
.ph .ph-label {
  position: absolute;
  inset: auto 4px 4px 4px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--mute);
  text-transform: uppercase;
}

/* footer */
.footer {
  border-top: 1px solid var(--ink);
  padding: 40px 0 60px;
  margin-top: 80px;
  background: var(--paper);
}
.footer .cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h4 {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 14px;
  color: var(--mute);
  font-weight: 400;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { padding: 4px 0; font-size: 13px; }
.footer .wordmark {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.footer .wordmark em { color: var(--accent); font-style: italic; }
.footer .fine {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  display: flex; justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--mute);
  text-transform: uppercase;
}

/* tweaks panel */
.tweaks {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1000;
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-width: 220px;
  box-shadow: 6px 6px 0 var(--ink);
}
.tweaks h5 {
  margin: 0 0 10px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mute);
  font-weight: 400;
}
.tweaks .row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.tweaks label { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.tweaks input { accent-color: var(--accent); }
.tweaks .close {
  position: absolute; top: 6px; right: 8px; background: none; border: 0; font-family: var(--mono); color: var(--mute);
}

/* page section title (editorial block) */
.block-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: end;
  padding: 30px 0 14px;
  border-bottom: 1px solid var(--ink);
}
.block-head .no {
  font-family: var(--serif);
  font-style: italic;
  font-size: 56px;
  color: var(--accent);
  line-height: 0.9;
}
.block-head .ttl {
  font-family: var(--serif);
  font-size: 36px;
  line-height: 1;
  font-weight: 500;
}
.block-head .meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--mute);
  text-transform: uppercase;
  text-align: right;
}

/* cards for compat list */
.part-card {
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 16px;
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 16px;
  align-items: center;
}
.part-card .thumb { width: 80px; height: 80px; }

/* stars */
.stars {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.stars .s { color: var(--accent); }
.stars .muted { color: var(--hair); }

/* compare row styling (detail page) */
.compare-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr 1fr;
  border-bottom: 1px solid var(--hair);
  padding: 14px 0;
  align-items: center;
  font-size: 13px;
}
.compare-row.head {
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--mute);
  text-transform: uppercase;
}
.compare-row .label { color: var(--mute); font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase; }
.compare-row .val.big { font-family: var(--serif); font-size: 22px; }

/* FAQ accordion */
details.faq {
  border-bottom: 1px solid var(--hair);
  padding: 14px 0;
}
details.faq summary {
  font-family: var(--serif);
  font-size: 19px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "＋";
  font-family: var(--mono);
  color: var(--accent);
}
details.faq[open] summary::after { content: "−"; }
details.faq .ans {
  padding: 12px 0 2px;
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.7;
}

/* note box */
.note {
  border: 1px solid var(--ink);
  padding: 14px 16px;
  background: var(--paper);
  font-size: 13px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
}
.note .mark {
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  color: var(--accent);
  line-height: 1;
}

/* =========================================================
   Responsive — tablet & mobile
   ========================================================= */
@media (max-width: 900px) {
  .page-wrap { padding: 0 18px; }

  .masthead-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 8px;
    padding: 12px 0;
  }
  .masthead .left, .masthead .right {
    justify-content: center;
    font-size: 10px;
    gap: 10px;
  }
  .masthead .wordmark { font-size: 28px; }
  .masthead .tagline {
    font-size: 9px;
    letter-spacing: 0.14em;
    padding-bottom: 8px;
  }
  .masthead .nav-row {
    overflow-x: auto;
    flex-wrap: nowrap;
    gap: 14px;
    -webkit-overflow-scrolling: touch;
    font-size: 10px;
    padding: 8px 0;
  }
  .masthead .nav-row > div {
    gap: 16px !important;
    white-space: nowrap;
  }
  .masthead .nav-row > div:last-child {
    display: none !important;  /* hide secondary INDEX/A-Z/ABOUT on mobile */
  }

  .footer { padding: 28px 0 40px; margin-top: 50px; }
  .footer .cols { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer .wordmark { font-size: 26px; }
  .footer .fine {
    flex-direction: column;
    gap: 6px;
    font-size: 9px;
  }

  .block-head {
    grid-template-columns: auto 1fr;
    gap: 12px;
    padding: 22px 0 10px;
  }
  .block-head .meta { display: none; }
  .block-head .no { font-size: 34px; }
  .block-head .ttl { font-size: 22px; line-height: 1.15; }

  /* tables: allow horizontal scroll wrapper */
  table.data {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    font-size: 12px;
  }
  table.data th, table.data td { padding: 10px 10px; }

  /* compare row collapses */
  .compare-row {
    grid-template-columns: 1fr !important;
    gap: 6px !important;
    padding: 12px 14px !important;
  }

  .part-card {
    grid-template-columns: 60px 1fr;
    gap: 12px;
    padding: 12px;
  }
  .part-card > :last-child {
    grid-column: 1 / -1;
    text-align: left;
    border-top: 1px solid var(--hair);
    padding-top: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .tweaks {
    right: 10px;
    bottom: 10px;
    min-width: 0;
    max-width: calc(100vw - 20px);
    padding: 10px 12px;
    font-size: 10px;
    box-shadow: 4px 4px 0 var(--ink);
  }

  details.faq summary { font-size: 16px; }
  details.faq .ans { font-size: 13px; }
}

@media (max-width: 640px) {
  .page-wrap { padding: 0 14px; }

  /* Broad override: any inline grid inside a section collapses.
     Inline grids with 4+ cols → 2 cols; 2-3 cols → 1 col. */
  section [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    gap: 18px !important;
  }
  /* Categories, makers, and other list grids that should stay multi-col:
     opt-in via the .grid-keep-2 class applied in markup */
  section [style*="grid-template-columns"].grid-keep-2,
  section [style*="repeat(6"],
  section [style*="repeat(8"],
  section [style*="repeat(4"] {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0 !important;
  }

  /* By-the-numbers 4-col section wrapper */
  section[style*="repeat(4"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .footer .cols { grid-template-columns: 1fr; }

  /* Side-by-side compare (3-col) → single column */
  section > div[style*="grid-template-columns: 1.1fr 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  /* Tighten block heads */
  .block-head .no  { font-size: 28px; }
  .block-head .ttl { font-size: 20px; }

  /* kill horizontal bleed */
  body { overflow-x: hidden; }

  /* smaller heroes */
  .hero-number { letter-spacing: -0.02em; }
}

/* Hide any element marked desktop-only on mobile */
@media (max-width: 640px) {
  .desktop-only { display: none !important; }
}