/* ========================================================
   Science Home Kanoya - Common Design System
   ダークウッド × 深緑 × オフホワイト / 和モダン上質
   ======================================================== */

:root {
  /* Core palette */
  --ink: #1a1613;             /* 墨黒 */
  --ink-2: #2b241d;
  --wood-dark: #3a2d20;       /* ダークウッド */
  --wood: #6b533c;
  --wood-light: #c9a882;      /* 木肌 */
  --forest: #2d4a3a;          /* 深緑 */
  --forest-deep: #1e3529;
  --forest-light: #556b5d;
  --kindei: #a68a52;          /* 金泥（アクセント） */
  --paper: #faf7f2;           /* 和紙オフホワイト */
  --paper-2: #f2ede4;         /* 生成り */
  --paper-3: #e8dfd0;         /* 麻 */
  --line: #d8ceba;
  --line-strong: #8a7a5f;
  --muted: #7a6f5e;
  --muted-2: #5a5348;

  /* Typography */
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "游明朝", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "游ゴシック", "Yu Gothic", sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  /* Rhythm */
  --container: 1240px;
  --gap: 24px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.75;
  font-size: 15px;
}

body {
  /* subtle washi texture */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(166,138,82,0.04) 0px, transparent 1.5px),
    radial-gradient(circle at 60% 70%, rgba(58,45,32,0.03) 0px, transparent 2px),
    radial-gradient(circle at 80% 20%, rgba(45,74,58,0.02) 0px, transparent 1.5px);
  background-size: 180px 180px, 240px 240px, 200px 200px;
}

.serif { font-family: var(--serif); font-weight: 500; letter-spacing: 0.04em; }
.mono { font-family: var(--mono); }
.en { font-family: var(--serif); letter-spacing: 0.18em; font-weight: 400; font-style: italic; }

a { color: inherit; text-decoration: none; }

/* -------- Layout -------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-wide { max-width: 1440px; margin: 0 auto; padding: 0 32px; }

/* -------- Header -------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250,247,242,0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
/* Science Home logo mark — 5 vertical bars */
.brand-mark {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 4px 0;
  font-size: 0;
  color: transparent;
}
.brand-mark::before,
.brand-mark::after,
.brand-mark i {
  content: "";
  display: block;
  width: 4px;
  height: 100%;
  background: currentColor;
}
.brand-mark {
  --c1: #6b3d2f;
  --c2: #8a2a4a;
  --c3: #b8934a;
  --c4: #c96a3d;
  --c5: #9c4a35;
}
/* Emulate 5 bars via a linear-gradient — safer across markup variants */
.brand-mark {
  background:
    linear-gradient(to right,
      transparent 0%, transparent 8%,
      var(--c1) 8%,  var(--c1) 22%,
      transparent 22%, transparent 26%,
      var(--c2) 26%, var(--c2) 40%,
      transparent 40%, transparent 44%,
      var(--c3) 44%, var(--c3) 58%,
      transparent 58%, transparent 62%,
      var(--c4) 62%, var(--c4) 76%,
      transparent 76%, transparent 80%,
      var(--c5) 80%, var(--c5) 94%,
      transparent 94%, transparent 100%);
  background-size: 100% 78%;
  background-position: center;
  background-repeat: no-repeat;
}
.brand-mark::before,
.brand-mark::after,
.brand-mark i { display: none; }
.brand-text .name {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--ink);
  line-height: 1;
}
.brand-text .sub {
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--muted);
  margin-top: 6px;
  font-family: var(--serif);
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.nav a:hover { border-color: var(--kindei); }
.nav .cta-mini {
  background: var(--forest);
  color: var(--paper);
  padding: 12px 22px;
  border: none;
  font-size: 12px;
  letter-spacing: 0.18em;
}
.nav .cta-mini:hover { border-color: transparent; background: var(--forest-deep); }

/* -------- Typography -------- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; color: var(--ink); letter-spacing: 0.05em; }

.eyebrow {
  font-family: var(--serif);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--kindei);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 36px; height: 1px; background: var(--kindei);
  display: inline-block;
}

.section-title {
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.35;
  margin: 0 0 24px;
  color: var(--ink);
}
.section-lead {
  font-size: 16px;
  line-height: 2;
  color: var(--muted-2);
  max-width: 640px;
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 32px;
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.14em;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: all .25s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--forest); color: var(--paper); border-color: var(--forest); }
.btn.primary:hover { background: var(--forest-deep); }
.btn.ghost-light { color: var(--paper); border-color: rgba(250,247,242,0.5); }
.btn.ghost-light:hover { background: var(--paper); color: var(--ink); }
.btn .arrow { font-family: var(--serif); font-size: 18px; }

/* -------- Placeholders (image slots) -------- */
.ph {
  position: relative;
  background: var(--paper-3);
  background-image:
    repeating-linear-gradient(45deg,
      transparent 0, transparent 12px,
      rgba(58,45,32,0.05) 12px, rgba(58,45,32,0.05) 13px);
  border: 1px solid var(--line);
  overflow: hidden;
  color: var(--muted-2);
  display: grid;
  place-items: center;
}
.ph img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.ph.has-img { background: transparent; background-image: none; border-color: transparent; }
.ph.has-img .ph-label { display: none; }
.ph .ph-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 8px 12px;
  background: rgba(250,247,242,0.9);
  border: 1px solid var(--line);
  color: var(--wood-dark);
  text-align: center;
  max-width: 80%;
  white-space: pre-line;
}
.ph-dark {
  background: var(--wood-dark);
  background-image:
    repeating-linear-gradient(45deg,
      transparent 0, transparent 12px,
      rgba(255,255,255,0.03) 12px, rgba(255,255,255,0.03) 13px);
  border-color: rgba(255,255,255,0.08);
  color: var(--paper-2);
}
.ph-dark .ph-label {
  background: rgba(26,22,19,0.8);
  border-color: rgba(201,168,130,0.3);
  color: var(--paper-2);
}

/* -------- Footer -------- */
.site-footer {
  background: var(--ink);
  color: var(--paper-2);
  padding: 80px 0 40px;
  font-size: 13px;
}
.site-footer .inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1.5fr 2fr 1fr;
  gap: 64px;
}
.site-footer h4 {
  font-size: 13px;
  letter-spacing: 0.2em;
  margin: 0 0 20px;
  color: var(--kindei);
}
.site-footer .col ul { list-style: none; padding: 0; margin: 0; }
.site-footer .col ul li { margin-bottom: 10px; }
.site-footer .col ul a { color: var(--paper-2); opacity: 0.7; font-size: 12px; }
.site-footer .col ul a:hover { opacity: 1; color: var(--paper); }
.site-footer .nap { line-height: 2; font-size: 12px; opacity: 0.75; }
.site-footer .copy {
  border-top: 1px solid rgba(250,247,242,0.1);
  margin-top: 60px;
  padding-top: 24px;
  max-width: 1240px;
  margin-left: auto; margin-right: auto;
  padding-left: 32px; padding-right: 32px;
  font-size: 11px;
  letter-spacing: 0.15em;
  opacity: 0.5;
}

/* -------- Breadcrumb -------- */
.crumb {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.crumb a:hover { color: var(--ink); }
.crumb .sep { margin: 0 10px; color: var(--line-strong); }

/* -------- Common Section rhythm -------- */
section { padding: 100px 0; }
.section-head { margin-bottom: 60px; }

/* -------- Utility -------- */
.divider {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}
.hairline-top { border-top: 1px solid var(--line); }
.tag {
  display: inline-block;
  font-family: var(--serif);
  font-size: 11px;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  color: var(--muted-2);
}

/* ============================================================
   Responsive — Generic grid collapse for detail pages
   These target inline grid styles used across product/detail pages.
   ============================================================ */
@media (max-width: 960px) {
  /* Any 2-col split → stack */
  .detail-hero,
  .what-sec .layout,
  .sim-grid,
  .diagram-grid,
  .prod-row,
  .prod-row.reverse {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }
  /* 3-4 col galleries → 2 cols */
  .axis-grid,
  .stats-grid,
  .gallery-grid,
  .related-grid,
  .rel-grid,
  .mission-grid,
  .merit-grid,
  .culture-grid,
  .cat-grid,
  .alt-contact .grid,
  .strategy .grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 16px !important;
  }
  .detail-hero { min-height: auto !important; }
}

@media (max-width: 640px) {
  /* Detail galleries → 1 col */
  .axis-grid,
  .stats-grid,
  .gallery-grid,
  .related-grid,
  .rel-grid,
  .mission-grid,
  .merit-grid,
  .culture-grid,
  .cat-grid,
  .alt-contact .grid,
  .strategy .grid {
    grid-template-columns: 1fr !important;
  }
}

/* ============================================================
   Responsive — Tablet (≤960px)
   ============================================================ */
@media (max-width: 960px) {
  .container, .container-wide { padding: 0 24px; }
  section { padding: 72px 0; }

  /* Header */
  .site-header .inner { height: 64px; padding: 0 20px; }
  .brand-mark { width: 38px; height: 38px; font-size: 18px; }
  .brand-text .name { font-size: 15px; letter-spacing: 0.08em; }
  .brand-text .sub { font-size: 9px; letter-spacing: 0.2em; }
  .nav { gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
  .nav a { font-size: 12px; letter-spacing: 0.05em; }
  .nav .cta-mini { padding: 9px 14px; font-size: 11px; letter-spacing: 0.1em; }

  /* Footer */
  .site-footer { padding: 60px 0 32px; }
  .site-footer .inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 24px;
  }
  .site-footer .copy { padding-left: 24px; padding-right: 24px; margin-top: 40px; }
}

/* ============================================================
   Responsive — Mobile (≤640px)
   ============================================================ */
@media (max-width: 640px) {
  .container, .container-wide { padding: 0 20px; }
  section { padding: 56px 0; }

  .site-header .inner { height: 56px; padding: 0 16px; }
  .brand { gap: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: 16px; }
  .brand-text .name { font-size: 13px; }
  .brand-text .sub { font-size: 8px; letter-spacing: 0.18em; margin-top: 4px; }

  /* Mobile nav — hide secondary links, keep only cta-mini */
  .nav { gap: 10px; }
  .nav a:not(.cta-mini) { display: none; }
  .nav .cta-mini { padding: 8px 12px; font-size: 10px; letter-spacing: 0.08em; }

  .section-title { font-size: clamp(22px, 6vw, 30px); }
  .section-lead { font-size: 14px; line-height: 1.9; }
  .eyebrow { font-size: 10px; letter-spacing: 0.2em; margin-bottom: 14px; }
  .eyebrow::before { width: 24px; }

  .btn { padding: 14px 22px; font-size: 12px; letter-spacing: 0.1em; }

  .crumb { padding: 14px 0; font-size: 11px; }
  .crumb .sep { margin: 0 6px; }
}