/* Oxford University Meteorological Society — shared styles */

:root {
  color-scheme: light;
  --oxford:      #002147;  /* Oxford blue */
  --oxford-2:    #0a3a6b;
  --sky:         #2a78d6;
  --sky-light:   #6fb1f0;
  --cloud:       #f5f8fc;
  --paper:       #ffffff;
  --ink:         #16202e;
  --ink-2:       #4a5866;
  --muted:       #8a97a6;
  --line:        #e2e9f1;
  --sun:         #f2a742;
  --shadow:      0 1px 2px rgba(0,33,71,.06), 0 8px 24px rgba(0,33,71,.08);
  --radius:      6px;
  --maxw:        1080px;
  --serif:       "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans:        system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --oxford:    #0a1b30;
    --oxford-2:  #12304f;
    --sky:       #5aa0ec;
    --sky-light: #8fc4ff;
    --cloud:     #0f1824;
    --paper:     #16222f;
    --ink:       #eef4fb;
    --ink-2:     #b3c2d1;
    --muted:     #768899;
    --line:      #26384c;
    --shadow:    0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cloud);
  color: var(--ink);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; color: var(--ink); }
a { color: var(--sky); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(18px, 4vw, 32px); }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--oxford);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 0;
}
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border: 1.5px solid rgba(255,255,255,.35);
  border-radius: 50%;
  font-size: 20px;
}
.brand .name { display: flex; flex-direction: column; line-height: 1.15; }
.brand .name b { font-family: var(--serif); font-size: 16px; font-weight: 600; }
.brand .name span { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--sky-light); }

.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  color: rgba(255,255,255,.82); padding: 8px 14px; border-radius: 5px;
  font-size: 14px; font-weight: 500;
}
.nav-links a:hover { background: rgba(255,255,255,.1); color: #fff; text-decoration: none; }
.nav-links a.active { background: var(--sky); color: #fff; }

.nav-toggle { display: none; background: none; border: 0; color: #fff; font-size: 24px; cursor: pointer; padding: 4px 8px; }

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 2px;
    background: var(--oxford); padding: 8px 16px 16px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(111,177,240,.28), transparent 60%),
    linear-gradient(160deg, var(--oxford) 0%, var(--oxford-2) 100%);
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.10) 1px, transparent 1.4px);
  background-size: 26px 26px; opacity: .5; pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; padding-top: clamp(48px, 9vw, 96px); padding-bottom: clamp(48px, 9vw, 96px); }
.hero .eyebrow { color: var(--sky-light); letter-spacing: .18em; text-transform: uppercase; font-size: 13px; font-weight: 600; margin: 0 0 14px; }
.hero h1 { color: #fff; font-size: clamp(34px, 6vw, 60px); margin: 0 0 18px; max-width: 16ch; }
.hero p.lede { color: rgba(255,255,255,.85); font-size: clamp(17px, 2.4vw, 21px); max-width: 56ch; margin: 0 0 30px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 5px;
  font-weight: 600; font-size: 15px; cursor: pointer; border: 1.5px solid transparent;
  transition: transform .08s ease, box-shadow .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--sky); color: #fff; box-shadow: 0 6px 18px rgba(42,120,214,.4); }
.btn-primary:hover { background: var(--sky-light); color: var(--oxford); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Sections ---------- */
section.block { padding: clamp(48px, 8vw, 84px) 0; }
.section-head { max-width: 60ch; margin: 0 auto clamp(32px, 5vw, 52px); text-align: center; }
.section-head .eyebrow { color: var(--sky); letter-spacing: .16em; text-transform: uppercase; font-size: 12px; font-weight: 700; margin: 0 0 10px; }
.section-head h2 { font-size: clamp(26px, 4vw, 38px); margin: 0 0 12px; }
.section-head p { color: var(--ink-2); margin: 0; font-size: 17px; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 22px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid.cols-3 { grid-template-columns: 1fr; } .grid.cols-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.card .icon { font-size: 30px; margin-bottom: 12px; display: block; }
.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p { margin: 0; color: var(--ink-2); }

/* ---------- Term card ---------- */
.termcard {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.termcard .tc-head {
  background: linear-gradient(160deg, var(--oxford), var(--oxford-2));
  color: #fff; padding: 26px 28px;
  display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.termcard .tc-head h3 { color: #fff; margin: 0; font-size: 22px; }
.termcard .tc-head .term { color: var(--sky-light); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }

.event {
  display: grid; grid-template-columns: 92px 1fr auto; gap: 18px;
  padding: 20px 28px; border-top: 1px solid var(--line); align-items: start;
}
.event:first-child { border-top: 0; }
.event .when { text-align: center; }
.event .when .wk { display: block; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.event .when .date { display: block; font-family: var(--serif); font-size: 22px; color: var(--oxford); font-weight: 600; }
:root:where(:not([data-theme="light"])) .event .when .date { color: var(--sky-light); }
@media (prefers-color-scheme: dark) { .event .when .date { color: var(--sky-light); } }
.event .what h4 { margin: 0 0 4px; font-size: 18px; font-family: var(--serif); }
.event .what p { margin: 0; color: var(--ink-2); font-size: 15px; }
.event .what .speaker { color: var(--sky); font-weight: 600; }
.event .meta { text-align: right; color: var(--muted); font-size: 13px; white-space: nowrap; }
.tag { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: 3px 9px; border-radius: 4px; background: var(--cloud); color: var(--sky); border: 1px solid var(--line); }
@media (max-width: 620px) {
  .event { grid-template-columns: 64px 1fr; }
  .event .meta { grid-column: 2; text-align: left; }
}

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; text-align: center; }
@media (max-width: 720px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat .num { font-family: var(--serif); font-size: clamp(30px, 5vw, 44px); color: var(--sky); font-weight: 600; }
.stat .lbl { color: var(--ink-2); font-size: 14px; }

/* ---------- Prose ---------- */
.prose { max-width: 68ch; margin: 0 auto; }
.prose p { color: var(--ink-2); font-size: 17px; }
.prose h2 { margin-top: 40px; }

/* ---------- Team ---------- */
.team { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
@media (max-width: 860px) { .team { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) { .team { grid-template-columns: 1fr; } }
.person { text-align: center; }
.person .avatar {
  width: 84px; height: 84px; margin: 0 auto 12px; border-radius: 50%;
  display: grid; place-items: center; font-size: 32px;
  background: linear-gradient(160deg, var(--sky-light), var(--sky)); color: #fff;
}
.person b { display: block; font-family: var(--serif); font-size: 17px; }
.person span { color: var(--muted); font-size: 14px; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 5px;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--sky); box-shadow: 0 0 0 3px rgba(42,120,214,.18);
}
.field textarea { resize: vertical; min-height: 130px; }
.contact-info li { list-style: none; display: flex; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); }
.contact-info { padding: 0; margin: 0; }
.contact-info li:first-child { border-top: 0; }
.contact-info .ci-icon { font-size: 22px; flex: none; }
.contact-info b { display: block; font-family: var(--serif); }
.contact-info span { color: var(--ink-2); }
.form-note { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* ---------- CTA band ---------- */
.cta {
  background: linear-gradient(160deg, var(--oxford), var(--oxford-2));
  color: #fff; text-align: center; border-radius: var(--radius); padding: clamp(36px, 6vw, 64px) 24px;
}
.cta h2 { color: #fff; font-size: clamp(24px, 4vw, 34px); margin: 0 0 12px; }
.cta p { color: rgba(255,255,255,.85); margin: 0 auto 26px; max-width: 52ch; }

/* ---------- Footer ---------- */
.site-footer { background: var(--oxford); color: rgba(255,255,255,.75); padding: 44px 0 32px; margin-top: 20px; }
.footer-grid { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; }
.site-footer a { color: rgba(255,255,255,.75); }
.site-footer a:hover { color: #fff; }
.site-footer h4 { color: #fff; font-family: var(--serif); margin: 0 0 12px; font-size: 16px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 14px; }
.footer-brand { max-width: 30ch; }
.footer-brand p { font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 32px; padding-top: 20px; font-size: 13px; color: rgba(255,255,255,.55); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }