/* EvidEpi design system. Palette from the logo: navy, teal, paper, ink. */
:root {
  --navy: #0B1F3A;
  --navy-soft: #14284a;
  --teal: #1F8A8A;
  --teal-dark: #176b6b;
  --paper: #FAFAF7;
  --ink: #0A0E14;
  --muted: #5b6675;
  --line: #e4e6e1;
  --card: #ffffff;
  --danger: #b3261e;
  --ok: #1f7a4d;
  --maxw: 1080px;
  --radius: 10px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
}
a { color: var(--teal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

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

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(250,250,247,0.92);
  backdrop-filter: saturate(140%) blur(6px);
  position: sticky; top: 0; z-index: 40;
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 128px; padding: 10px 0;
}
.nav .brand img { height: 112px; display: block; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--navy); font-weight: 500; font-size: 15px; }
.nav-links a.active { color: var(--teal-dark); }
.nav-links a.nav-cta {
  background: var(--teal); color: #ffffff; padding: 10px 18px; border-radius: 8px;
  font-size: 14px; font-weight: 700;
}
.nav-links a.nav-cta:hover { background: var(--teal-dark); color: #ffffff; text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; font-size: 24px; color: var(--navy); cursor: pointer; }

/* Hero */
.hero {
  padding: 96px 0 72px;
  background:
    radial-gradient(1100px 400px at 80% -10%, rgba(31,138,138,0.10), transparent 60%),
    linear-gradient(180deg, #fff, var(--paper));
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 46px;
  line-height: 1.12;
  color: var(--navy);
  margin: 0 0 20px;
  max-width: 18ch;
}
.hero p { font-size: 20px; color: var(--muted); max-width: 62ch; margin: 0 0 28px; }

.btn {
  display: inline-block; border: 0; cursor: pointer;
  background: var(--teal); color: #fff; font-weight: 600; font-size: 16px;
  padding: 13px 24px; border-radius: 8px; font-family: var(--sans);
}
.btn:hover { background: var(--teal-dark); text-decoration: none; }
.btn.secondary { background: transparent; color: var(--navy); border: 1px solid var(--line); }
.btn.secondary:hover { background: #fff; }
.btn.block { display: block; width: 100%; text-align: center; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* Sections */
section.block { padding: 64px 0; border-bottom: 1px solid var(--line); }
section.block:last-of-type { border-bottom: 0; }
h2 { font-family: var(--serif); color: var(--navy); font-size: 30px; margin: 0 0 20px; font-weight: 700; }
h3 { color: var(--navy); font-size: 20px; margin: 0 0 8px; }
.lead-body p { margin: 0 0 16px; max-width: 68ch; }
.lead-body ul { max-width: 68ch; padding-left: 22px; }
.lead-body li { margin: 6px 0; }

/* Service cards */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 8px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px;
}
.card h3 { margin-top: 0; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

/* Publications */
.pub-controls { display: flex; gap: 12px; align-items: center; margin-bottom: 24px; flex-wrap: wrap; }
.pub-controls input, .pub-controls select {
  padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 15px; font-family: var(--sans);
}
.pub-controls input { flex: 1; min-width: 220px; }
.pub-year { font-family: var(--serif); color: var(--teal-dark); font-weight: 700; font-size: 22px; margin: 28px 0 10px; }
.pub {
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.pub .t { color: var(--navy); font-weight: 600; }
.pub .a { color: var(--muted); font-size: 14.5px; }
.pub .j { font-style: italic; color: #444; font-size: 14.5px; }
.badge {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--teal-dark); background: rgba(31,138,138,0.10);
  padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle;
}

/* Forms */
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 14px; color: var(--navy); margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 15px; font-family: var(--sans); background: #fff;
}
.field textarea { min-height: 130px; resize: vertical; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; max-width: 640px; }
.note { font-size: 14px; color: var(--muted); }
.msg { padding: 12px 14px; border-radius: 8px; font-size: 14px; margin: 12px 0; }
.msg.ok { background: rgba(31,122,77,0.10); color: var(--ok); }
.msg.err { background: rgba(179,38,30,0.08); color: var(--danger); }
.hidden { display: none !important; }

/* Footer */
.site-footer { background: var(--navy); color: #cdd6e4; padding: 40px 0; margin-top: 0; }
.site-footer .container { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.site-footer img { height: 34px; }
.site-footer a { color: #9fd3d3; }
.site-footer .small { font-size: 13px; color: #8a97ab; }

@media (max-width: 760px) {
  .nav-links { position: absolute; top: 128px; left: 0; right: 0; background: var(--paper);
    flex-direction: column; align-items: flex-start; padding: 16px 24px; gap: 16px;
    border-bottom: 1px solid var(--line); display: none; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .hero { padding: 64px 0 48px; }
}

/* Partners banner */
.partners-row {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 40px; margin-top: 24px;
}
.partner-logo {
  height: 60px; width: auto; object-fit: contain;
  filter: grayscale(100%); opacity: .75; transition: opacity .2s, filter .2s;
}
.partner-logo:hover { filter: none; opacity: 1; }