:root {
  --ink: #0b2545;
  --ink-soft: #1f3a5f;
  --accent: #1d6f8e;
  --accent-soft: #e6f0f4;
  --muted: #5b6b7a;
  --rule: #e3e8ee;
  --bg: #ffffff;
  --bg-soft: #f7f9fb;
  --max: 1100px;
  --shadow: 0 1px 2px rgba(11, 37, 69, 0.06), 0 8px 24px rgba(11, 37, 69, 0.04);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  font-size: 16.5px;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Header */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: saturate(140%) blur(6px);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-top: 18px; padding-bottom: 18px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 16px; }
.brand img { height: 56px; width: auto; }
.brand strong { font-size: 22px; letter-spacing: -0.5px; font-weight: 700; display: block; }
.brand .accent-word { color: var(--accent); font-weight: 400; }
.brand small { display: block; color: var(--muted); font-size: 11px; letter-spacing: 1.4px; text-transform: uppercase; margin-top: 2px; }
nav.primary { display: flex; gap: 22px; flex-wrap: wrap; }
nav.primary a { color: var(--ink); font-weight: 500; font-size: 14.5px; }
nav.primary a.active { color: var(--accent); }

/* Hero */
.hero { padding: 72px 0 56px; background: linear-gradient(180deg, var(--accent-soft) 0%, transparent 100%); }
.hero h1 { font-size: 44px; line-height: 1.1; letter-spacing: -1px; margin: 0 0 16px; max-width: 760px; }
.hero p.lede { font-size: 18.5px; color: var(--ink-soft); max-width: 680px; margin: 0; }
.hero .cta { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 11px 18px; border-radius: 8px;
  background: var(--ink); color: #fff; font-weight: 500; font-size: 14.5px;
  border: 1px solid var(--ink);
}
.btn:hover { text-decoration: none; background: var(--ink-soft); border-color: var(--ink-soft); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn.ghost:hover { background: var(--bg-soft); }

/* Sections */
section.block { padding: 64px 0; border-top: 1px solid var(--rule); }
section.block:first-of-type { border-top: 0; }
section.block h2 { font-size: 28px; letter-spacing: -0.4px; margin: 0 0 8px; }
section.block .kicker { color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: 1.6px; text-transform: uppercase; margin-bottom: 8px; }
section.block .lede { font-size: 17px; color: var(--ink-soft); max-width: 720px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 32px; }
.card { background: var(--bg-soft); border: 1px solid var(--rule); border-radius: 12px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 14.5px; }

/* Two-column */
.two-col { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: start; margin-top: 28px; }
.two-col .col p { color: var(--ink-soft); }

/* Lists */
.tight-list { margin: 12px 0; padding-left: 18px; }
.tight-list li { margin: 6px 0; color: var(--ink-soft); }

/* Framework diagram */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 28px; }
.flow .stage { background: #fff; border: 1px solid var(--rule); border-radius: 12px; padding: 16px; box-shadow: var(--shadow); }
.flow .stage h4 { margin: 0 0 6px; font-size: 14px; color: var(--accent); letter-spacing: 0.4px; text-transform: uppercase; }
.flow .stage p { margin: 0; font-size: 14px; color: var(--ink-soft); }
.flow .stage .arrow { font-size: 18px; color: var(--accent); margin-top: 6px; }

/* Committee */
.people { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; }
.people .group { background: var(--bg-soft); border: 1px solid var(--rule); border-radius: 12px; padding: 20px; }
.people .group h3 { margin: 0 0 4px; font-size: 17px; }
.people .group .chair { color: var(--accent); font-weight: 500; font-size: 14px; margin-bottom: 12px; }
.people .group ul { margin: 0; padding-left: 18px; }
.people .group li { margin: 4px 0; color: var(--ink-soft); }

/* Events */
.event { border-left: 3px solid var(--accent); padding: 6px 0 6px 16px; margin: 18px 0; }
.event .date { font-size: 13px; color: var(--accent); font-weight: 600; letter-spacing: 0.8px; text-transform: uppercase; }
.event h3 { margin: 4px 0; font-size: 17px; }
.event p { margin: 0; color: var(--ink-soft); font-size: 14.5px; }

/* Contact form */
form.contact { margin-top: 24px; max-width: 560px; }
form.contact label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 4px; font-weight: 500; }
form.contact input, form.contact textarea {
  width: 100%; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--rule); font: inherit; color: var(--ink);
  margin-bottom: 14px; background: var(--bg);
}
form.contact textarea { min-height: 120px; }
form.contact button { cursor: pointer; }

/* Signup forms */
.signup { background: var(--bg-soft); border: 1px solid var(--rule); border-radius: 12px; padding: 28px 28px 24px; margin-top: 28px; }
.signup .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.signup label.field { display: block; font-size: 13px; color: var(--ink-soft); font-weight: 500; margin-bottom: 12px; }
.signup label.field input,
.signup label.field select,
.signup label.field textarea { display: block; width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--rule); font: inherit; color: var(--ink); background: var(--bg); margin-top: 4px; box-sizing: border-box; resize: vertical; }
.cards.two-by-two { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 820px) { .cards.two-by-two { grid-template-columns: 1fr; } }

/* Google Forms embed */
.google-form { background: var(--bg-soft); border: 1px solid var(--rule); border-radius: 12px; padding: 8px; margin-top: 28px; overflow: hidden; }
.google-form iframe { display: block; width: 100%; border: none; }
.signup fieldset { border: none; padding: 0; margin: 12px 0 8px; }
.signup fieldset legend { font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-bottom: 10px; padding: 0; }
.signup .keywords { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; }
.signup .keywords label { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--ink); cursor: pointer; line-height: 1.4; }
.signup .keywords input { margin-top: 3px; flex-shrink: 0; }
.signup button { cursor: pointer; margin-top: 16px; }
.signup .thanks { color: var(--accent); font-weight: 500; margin-top: 12px; display: none; }
.signup.done .thanks { display: block; }

@media (max-width: 600px) {
  .signup .row, .signup .keywords { grid-template-columns: 1fr; }
}

/* Footer */
footer.site { border-top: 1px solid var(--rule); padding: 40px 0 32px; margin-top: 56px; color: var(--muted); font-size: 13.5px; }
footer.site .container { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
footer.site .footer-col strong { display: block; color: var(--ink); font-size: 12px; letter-spacing: 1.3px; text-transform: uppercase; margin-bottom: 10px; font-weight: 600; }
footer.site .footer-col p { margin: 0; line-height: 1.6; }
footer.site .footer-col a { color: var(--ink-soft); }
footer.site .footer-meta { color: var(--muted); font-size: 12.5px; margin-top: 8px; }
@media (max-width: 820px) { footer.site .container { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { footer.site .container { grid-template-columns: 1fr; } }

/* Partner institutions */
.partners { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; margin-top: 32px; }
.partner { flex: 0 1 calc(25% - 12px); }
@media (max-width: 820px) { .partner { flex: 0 1 calc(50% - 8px); } }
.partner { background: #fff; border: 1px solid var(--rule); border-radius: 12px; padding: 24px 20px; box-shadow: var(--shadow); display: flex; align-items: center; justify-content: center; min-height: 140px; }
.partner img { max-height: 80px; max-width: 100%; width: auto; height: auto; }
.partner img.biozentrum { max-height: 110px; }
.partner.tbd { background: transparent; border: 1.5px dashed #c9d3dc; box-shadow: none; color: var(--muted); font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; font-weight: 500; }
.partners-note { color: var(--muted); font-size: 13px; margin-top: 14px; }
@media (max-width: 820px) { .partners { grid-template-columns: repeat(2, 1fr); } }

/* Preview banner */
.preview-banner { background: #fff7e0; border-bottom: 1px solid #f0d674; color: #6b4d00; font-size: 13px; padding: 8px 0; }
.preview-banner .container { display: flex; gap: 12px; align-items: center; }
.preview-banner strong { letter-spacing: 0.4px; }

@media (max-width: 820px) {
  .hero h1 { font-size: 34px; }
  .cards, .flow { grid-template-columns: 1fr; }
  .two-col, .people { grid-template-columns: 1fr; }
  nav.primary { display: none; }
}