/*
 * kilder.css — kildebiblioteket i sitets eget designsystem.
 *
 * Erstatter nordic-landing.css og nordic-sources.css, som var 32 KB stylesheet
 * til én side i et andet farveunivers. Farverne herunder er de samme fire, som
 * home-theme.css og naturfag.css bruger, saa siden ikke laengere foeles som et
 * fremmed produkt, man klikker over i.
 */

:root {
  --navy: #1f3864;
  --navy-deep: #142747;
  --blue: #2e75b6;
  --teal: #0d6e6e;
  --purple: #7c3aed;
  --focus: #fbbf24;
  --paper: #ffffff;
  --ground: #f4f7fb;
  --line: #e3eaf2;
  --muted: #5e6e84;
  --radius: 20px;
  --shadow: 0 20px 54px rgba(25, 50, 88, .13);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--ground);
  color: #1a2b3d;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--navy); color: #fff; padding: 11px 17px;
  border-radius: 0 0 10px 10px; text-decoration: none; font-weight: 700;
}
.skip-link:focus { top: 0; }

/* ── Hoved og sidefod, som paa naturfagssiden ───────────────────────────── */

.site-header {
  min-height: 70px;
  padding: 10px clamp(16px, 4vw, 58px);
  display: flex; align-items: center; gap: 30px;
  background: rgba(18, 36, 67, .97);
  color: #fff; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px rgba(255, 255, 255, .1);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 11px; color: #fff; text-decoration: none; }
.brand-mark { font-size: 1.5rem; }
.brand strong { display: block; font-size: 1.05rem; letter-spacing: -.01em; }
.brand strong span { color: #8fc0f0; }
.brand small { display: block; font-size: .72rem; color: #b8cde8; }
.site-header nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.site-header nav > a {
  color: #dce7f7; text-decoration: none; padding: 8px 11px;
  border-radius: 8px; font-size: .79rem; font-weight: 700; white-space: nowrap;
}
.site-header nav > a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.site-header nav > a[aria-current="page"] { background: rgba(255, 255, 255, .15); color: #fff; }

footer {
  margin-top: 56px; padding: 30px clamp(16px, 4vw, 58px);
  background: var(--navy-deep); color: #c4d4ea;
  display: flex; align-items: center; justify-content: space-between; gap: 22px; flex-wrap: wrap;
}
footer strong { color: #fff; display: block; font-size: 1rem; }
footer p { font-size: .8rem; margin-top: 3px; }
footer nav { display: flex; gap: 15px; flex-wrap: wrap; }
footer a { color: #c4d4ea; text-decoration: none; font-size: .82rem; }
footer a:hover { color: #fff; text-decoration: underline; }

/* ── Toppen ─────────────────────────────────────────────────────────────── */

.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .68rem; font-weight: 900; letter-spacing: .13em;
  text-transform: uppercase; color: var(--teal);
}
.kicker::before { content: ""; width: 22px; height: 2px; background: var(--teal); }

.hero {
  padding: clamp(42px, 6vw, 74px) clamp(16px, 4vw, 58px) clamp(30px, 4vw, 46px);
  background:
    radial-gradient(circle at 82% 12%, rgba(124, 58, 237, .22), transparent 34%),
    radial-gradient(circle at 12% 84%, rgba(13, 110, 110, .2), transparent 38%),
    linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 52%, #294f87 100%);
  color: #fff;
}
.hero-inner { width: min(1160px, 100%); margin: 0 auto; }
.hero .kicker { color: #8fd6d6; }
.hero .kicker::before { background: #8fd6d6; }
.hero h1 {
  margin: 15px 0 0; max-width: 15ch;
  font-size: clamp(2.1rem, 5.2vw, 3.5rem); line-height: 1.05; letter-spacing: -.035em;
}
.hero h1 em { font-style: normal; color: #ffd88a; }
.hero p { margin-top: 17px; max-width: 56ch; font-size: 1.02rem; color: #cfe0f5; }

/* ── Indhold ────────────────────────────────────────────────────────────── */

main { width: min(1160px, calc(100% - 32px)); margin: -28px auto 0; position: relative; z-index: 1; }

.kort {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: clamp(20px, 4vw, 44px); margin-bottom: 22px;
}
.kort h2 { font-size: clamp(1.45rem, 2.6vw, 2.05rem); line-height: 1.13; letter-spacing: -.03em; margin: 13px 0 0; }
.kort > p { color: var(--muted); margin-top: 11px; max-width: 62ch; }

.metode { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin-top: 26px; }
.metode article { background: var(--ground); border: 1px solid var(--line); border-radius: 13px; padding: 18px; }
.metode span {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: var(--navy); color: #fff; font-size: .74rem; font-weight: 900; margin-bottom: 11px;
}
.metode h3 { font-size: .93rem; margin-bottom: 6px; }
.metode p { font-size: .82rem; color: var(--muted); }

.bibliotek-top { display: flex; align-items: end; justify-content: space-between; gap: 26px; flex-wrap: wrap; }
.bibliotek-top label { font-size: .74rem; font-weight: 850; display: block; }
.bibliotek-top input {
  display: block; margin-top: 6px; min-width: 280px;
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 13px;
  font: inherit; font-size: .88rem; background: var(--ground);
}
.antal { margin: 18px 0 13px; font-size: .78rem; color: var(--muted); }

.kildeliste { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.kilde {
  position: relative; display: block; text-decoration: none; color: inherit;
  background: var(--paper); border: 1px solid var(--line);
  border-left: 3px solid var(--teal); border-radius: 0 13px 13px 0;
  padding: 15px 42px 15px 17px; transition: box-shadow .15s, transform .15s;
}
.kilde:hover { box-shadow: 0 10px 26px rgba(31, 56, 100, .13); transform: translateY(-2px); }
.kilde-meta { display: block; font-size: .63rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; color: var(--teal); }
.kilde-titel { display: block; margin: 6px 0 9px; font-size: .92rem; line-height: 1.35; color: var(--navy); }
.kilde-emner { display: flex; gap: 5px; flex-wrap: wrap; }
.kilde-emner span {
  background: #eef3fa; color: #4a5f7d; border-radius: 999px;
  padding: 3px 9px; font-size: .67rem; font-weight: 650;
}
.kilde-dato { display: block; margin-top: 9px; font-size: .67rem; color: #8b98aa; }
.kilde-pil { position: absolute; right: 16px; top: 15px; color: var(--blue); font-size: 1rem; }

.tom { margin-top: 15px; padding: 20px; background: var(--ground); border-radius: 13px; }
.tom strong { display: block; margin-bottom: 5px; }
.tom p { font-size: .85rem; color: var(--muted); }

.graense { border-left: 4px solid #d97706; background: #fffbeb; border-color: #f3ddb0; }
.graense .kicker { color: #a15c11; }
.graense .kicker::before { background: #a15c11; }
.graense p { color: #7a5a2a; }

@media (max-width: 900px) {
  .metode, .kildeliste { grid-template-columns: 1fr; }
  .site-header nav > a:nth-child(2) { display: none; }
}

@media (max-width: 620px) {
  .site-header { min-height: 62px; padding: 8px 12px; gap: 12px; }
  .brand small { display: none; }
  .site-header nav { gap: 2px; }
  .site-header nav > a { padding: 8px 7px; font-size: .74rem; }
  main { width: min(100% - 18px, 1160px); }
  .kort { padding: 19px 15px; border-radius: 15px; }
  .bibliotek-top input { min-width: 0; width: 100%; }
  .bibliotek-top label { width: 100%; }
  footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  .kilde { transition: none; }
  .kilde:hover { transform: none; }
}