/* ============================================================
   北海道大学大学院理学研究院 生物化学研究室
   共通スタイルシート
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@500;700&family=Noto+Sans+JP:wght@400;500;700&display=swap');

:root {
  --color-bg: #f7f5f0;
  --color-bg-alt: #eeece3;
  --color-surface: #ffffff;
  --color-primary: #1c2b45;      /* 深いネイビー */
  --color-primary-light: #2f4569;
  --color-accent: #9c8156;       /* マットゴールド */
  --color-accent-light: #c9b389;
  --color-text: #2a2a28;
  --color-text-muted: #6a6a63;
  --color-border: #ddd8cc;

  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;

  --max-width: 1040px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.5;
  margin: 0 0 0.7em;
}

p { margin: 0 0 1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-primary);
  color: #f2efe6;
  border-bottom: 3px solid var(--color-accent);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding-top: 18px;
  padding-bottom: 18px;
  gap: 12px;
}

.site-title {
  display: block;
}

.site-title .en {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.03em;
}

.site-title .sub {
  display: block;
  font-size: 0.78rem;
  color: var(--color-accent-light);
  margin-top: 2px;
  letter-spacing: 0.05em;
}

.site-title:hover .en,
.site-title:hover .sub { color: #ffffff; }

nav.main-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  display: inline-block;
  padding: 8px 14px;
  color: #f2efe6;
  font-size: 0.92rem;
  border-radius: 3px;
  transition: background 0.15s ease, color 0.15s ease;
}

nav.main-nav a:hover,
nav.main-nav a[aria-current="page"] {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

/* ---------- Hero ---------- */
.hero {
  background:
    linear-gradient(160deg, rgba(28,43,69,0.94), rgba(47,69,105,0.9)),
    var(--color-primary);
  color: #f2efe6;
  padding: 76px 0 84px;
}

.hero h1 {
  color: #ffffff;
  font-size: 2rem;
  max-width: 720px;
}

.hero .lead {
  font-size: 1.05rem;
  color: #d8d3c3;
  max-width: 620px;
}

.hero .tag {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--color-accent-light);
  border: 1px solid var(--color-accent-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

/* ---------- Page header (non-home pages) ---------- */
.page-header {
  background: var(--color-primary);
  color: #f2efe6;
  padding: 48px 0;
}

.page-header h1 { color: #ffffff; margin-bottom: 0.3em; }
.page-header p { color: #d8d3c3; margin: 0; }

/* ---------- Sections ---------- */
section {
  padding: 64px 0;
}

section.alt { background: var(--color-bg-alt); }

.section-heading {
  margin-bottom: 36px;
}

.section-heading .eyebrow {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: 1.55rem;
  margin: 0;
}

/* ---------- Cards / grid ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 800px) {
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 28px;
}

.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5em;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #ffffff;
  padding: 11px 24px;
  border-radius: 3px;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  border: 1px solid var(--color-primary);
}

.btn:hover {
  background: var(--color-primary-light);
  color: #ffffff;
}

.btn.outline {
  background: transparent;
  color: #f2efe6;
  border: 1px solid var(--color-accent-light);
}

.btn.outline:hover {
  background: rgba(255,255,255,0.1);
  color: #ffffff;
}

/* ---------- News list ---------- */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.news-list li {
  display: flex;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.news-list time {
  flex: 0 0 auto;
  width: 110px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.news-list .tag-label {
  display: inline-block;
  font-size: 0.72rem;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: 3px;
  margin-right: 8px;
  vertical-align: middle;
}

.news-list .news-body { flex: 1 1 320px; }

/* ---------- Member cards ---------- */
/* hidden 属性を display:flex 等より優先させる */
[hidden] { display: none !important; }

.member-card {
  display: flex;
  gap: 22px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 26px;
  margin-bottom: 20px;
}

.member-card .photo {
  flex: 0 0 auto;
  width: 108px;
  height: 108px;
  border-radius: 6px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.7rem;
  text-align: center;
  overflow: hidden;
}

.member-card .photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.member-card .role {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.member-card h3 { margin-bottom: 4px; }

.member-card .meta {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

@media (max-width: 560px) {
  .member-card { flex-direction: column; }
}

.member-group-title {
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
  font-size: 1.15rem;
}
.member-group-title:first-of-type { margin-top: 0; }

/* ---------- Publications table ---------- */
.pub-year-group { margin-bottom: 36px; }

.pub-year-group h3 {
  font-size: 1.1rem;
  color: var(--color-accent);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pub-list li {
  padding: 14px 0;
  border-bottom: 1px dashed var(--color-border);
}

.pub-list .pub-authors { color: var(--color-text); }
.pub-list .pub-authors .self { font-weight: 700; }

.pub-list .pub-title {
  font-weight: 500;
  margin: 3px 0;
}

.pub-list .pub-venue {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.note-box {
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

/* ---------- Access / contact ---------- */
.access-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 800px) {
  .access-grid { grid-template-columns: 1fr; }
}

.info-table {
  width: 100%;
  border-collapse: collapse;
}

.info-table th, .info-table td {
  text-align: left;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.info-table th {
  width: 110px;
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.92rem;
}

.map-embed {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  overflow: hidden;
  min-height: 220px;
}

.map-embed iframe {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 300px;
  border: 0;
}

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--color-primary);
  color: #cfcabc;
  padding: 32px 0;
  font-size: 0.85rem;
}

footer.site-footer .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

footer.site-footer a { color: #e7e2d2; }
footer.site-footer a:hover { color: #ffffff; }