/* ============================================================
   Cleland Lab — shared stylesheet
   Edit the variables below to restyle the whole site at once.
   ============================================================ */

:root {
  --accent:        #8c1d2c;   /* dark red — main accent */
  --accent-dark:   #6a1521;   /* hover / darker shade    */
  --accent-soft:   #f6ecee;   /* pale tint for panels    */
  --ink:           #1c1a1b;   /* body text               */
  --ink-soft:      #5d585a;   /* secondary text          */
  --line:          #e5e0e1;   /* hairline borders        */
  --bg:            #ffffff;
  --bg-alt:        #faf8f8;

  --max:           1080px;    /* content width           */
  --radius:        10px;
  --font-sans:     "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
                   Helvetica, Arial, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; font-weight: 650; letter-spacing: -0.015em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }
p  { margin: 0 0 1.1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--ink-soft); }
.small { font-size: .92rem; }

/* ---------- header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 14px 24px; max-width: var(--max); margin: 0 auto;
}
.brand {
  font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none; white-space: nowrap;
}
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 26px; align-items: center; flex-wrap: wrap; }
.nav-links a {
  color: var(--ink-soft); font-size: .95rem; font-weight: 500;
  text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active { color: var(--ink); border-bottom-color: var(--accent); }

/* mobile menu (CSS-only) */
.nav-toggle { display: none; }
.nav-burger {
  display: none; cursor: pointer; padding: 6px; border: 1px solid var(--line);
  border-radius: 6px; line-height: 1; font-size: 1.2rem; color: var(--ink);
}

/* ---------- hero ---------- */
.hero { padding: 84px 0 64px; border-bottom: 1px solid var(--line); }
.hero-grid {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center;
}
.hero .eyebrow {
  text-transform: uppercase; letter-spacing: .12em; font-size: .75rem;
  font-weight: 650; color: var(--accent); margin-bottom: 14px;
}
.hero p.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 46ch; }
.hero-figure {
  aspect-ratio: 4/3; border-radius: var(--radius); overflow: hidden;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: .9rem; text-align: center; padding: 20px;
  border: 1px solid var(--line);
}
.hero-figure img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; padding: 11px 22px; border-radius: 999px;
  background: var(--accent); color: #fff !important; font-weight: 600;
  font-size: .95rem; text-decoration: none !important;
  transition: background .15s ease;
}
.btn:hover { background: var(--accent-dark); }
.btn.ghost {
  background: transparent; color: var(--accent) !important;
  border: 1.5px solid var(--accent);
}
.btn.ghost:hover { background: var(--accent-soft); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }

/* ---------- generic sections ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-head { margin-bottom: 34px; }
.section-head p { color: var(--ink-soft); max-width: 62ch; margin: 0; }

.page-head { padding: 56px 0 8px; }
.page-head h1 { margin-bottom: .25em; }
.page-head p { color: var(--ink-soft); max-width: 62ch; font-size: 1.05rem; }

/* ---------- cards ---------- */
.grid { display: grid; gap: 26px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; background: var(--bg);
}
.card h3 { margin-bottom: .4em; }
.card p:last-child { margin-bottom: 0; }
.tag {
  display: inline-block; font-size: .72rem; font-weight: 650;
  text-transform: uppercase; letter-spacing: .08em;
  color: var(--accent); background: var(--accent-soft);
  padding: 4px 10px; border-radius: 999px; margin-bottom: 12px;
}

/* ---------- news list ---------- */
.news { list-style: none; margin: 0; padding: 0; }
.news li {
  display: grid; grid-template-columns: 130px 1fr; gap: 20px;
  padding: 16px 0; border-bottom: 1px solid var(--line);
}
.news li:first-child { border-top: 1px solid var(--line); }
.news time { color: var(--accent); font-weight: 600; font-size: .9rem; padding-top: 2px; }
.news p { margin: 0; }

/* ---------- people ---------- */
.person { text-align: left; }
.person .photo {
  aspect-ratio: 1/1; border-radius: var(--radius); overflow: hidden;
  background: var(--accent-soft); border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-weight: 650; font-size: 1.6rem; margin-bottom: 14px;
}
.person .photo img { width: 100%; height: 100%; object-fit: cover; }
.person h3 { margin-bottom: .15em; font-size: 1.05rem; }
.person .role { color: var(--accent); font-size: .88rem; font-weight: 600; margin: 0 0 .5em; }
.person p { font-size: .93rem; color: var(--ink-soft); margin: 0 0 .5em; }
.person .links a { font-size: .85rem; margin-right: 12px; }

/* ---------- publications ---------- */
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list li { padding: 20px 0; border-bottom: 1px solid var(--line); }
.pub-list li:first-child { border-top: 1px solid var(--line); }
.pub-title { font-weight: 620; display: block; margin-bottom: 4px; color: var(--ink); }
.pub-authors { font-size: .93rem; color: var(--ink-soft); }
.pub-authors b { color: var(--ink); font-weight: 650; }
.pub-meta { font-size: .9rem; color: var(--ink-soft); margin-top: 4px; }
.pub-meta em { color: var(--ink); font-style: italic; }
.pub-links a { font-size: .85rem; margin-right: 14px; }
.year-head {
  margin: 44px 0 6px; font-size: 1.05rem; color: var(--accent);
  text-transform: uppercase; letter-spacing: .1em; font-weight: 700;
}
.year-head:first-of-type { margin-top: 12px; }

/* ---------- callout ---------- */
.callout {
  background: var(--accent); color: #fff; border-radius: var(--radius);
  padding: 40px; text-align: center;
}
.callout h2 { color: #fff; }
.callout p { color: rgba(255,255,255,.9); max-width: 60ch; margin: 0 auto 18px; }
.callout .btn { background: #fff; color: var(--accent) !important; }
.callout .btn:hover { background: rgba(255,255,255,.88); }

/* ---------- logos ---------- */
.logos {
  display: flex; flex-wrap: wrap; gap: 44px; align-items: center;
  justify-content: center; padding: 8px 0;
}
.logos img { height: 44px; width: auto; opacity: .75; filter: grayscale(1); }
.logos img:hover { opacity: 1; filter: none; }
.logos .placeholder {
  color: var(--ink-soft); font-size: .85rem; border: 1px dashed var(--line);
  padding: 14px 22px; border-radius: 6px;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); background: var(--bg-alt);
  padding: 44px 0; margin-top: 0; font-size: .92rem; color: var(--ink-soft);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.site-footer h4 {
  font-size: .78rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--ink); margin: 0 0 12px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line);
  font-size: .85rem;
}

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav { flex-wrap: wrap; }
  .nav-burger { display: block; }
  .nav-links {
    display: none; width: 100%; flex-direction: column;
    align-items: flex-start; gap: 4px; padding: 10px 0 4px;
  }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .news li { grid-template-columns: 1fr; gap: 4px; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 52px 0 44px; }
  .section { padding: 48px 0; }
  .callout { padding: 28px 22px; }
}