/* ============================================================
   Nordlicht Tierphysiologie – nordlicht-tierphysiologie.de
   Helles, ruhiges nordisches Design: viel Weißraum, kühle
   Papiertöne, eine Akzentfarbe (Petrol), keine Dauer-Animationen,
   keine externen Schriften.
   ============================================================ */

:root {
  --accent: #0e6b63;
  --accent-dark: #0a524c;
  --accent-soft: #e4f1ef;
  --ink: #24313a;
  --ink-soft: #57666f;
  --paper: #f7fafa;
  --paper-cool: #ebf2f1;
  --line: #d9e4e2;
  --card: #ffffff;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 19px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-dark); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 22px; }

h1, h2, h3, h4 { line-height: 1.25; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: 2.3rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.22rem; }

p + p { margin-top: 1em; }

/* ---------- Kopfbereich ---------- */

.top-strip {
  background: var(--accent);
  color: #e4f1ef;
  font-size: 0.82rem;
}
.top-strip-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 7px;
  padding-bottom: 7px;
  gap: 16px;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand { display: inline-flex; align-items: center; }
.brand-logo { width: 300px; height: 56px; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.95rem;
}
.main-nav > a,
.nav-parent > a {
  display: inline-block;
  padding: 9px 13px;
  color: var(--ink);
  text-decoration: none;
  border-radius: 6px;
}
.main-nav > a:hover,
.nav-parent > a:hover { background: var(--paper-cool); color: var(--accent-dark); }
.main-nav > a.active,
.nav-parent > a.active { color: var(--accent); font-weight: 600; }

.nav-parent { position: relative; }
.sub-nav {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(36, 49, 58, 0.12);
  padding: 8px;
  display: none;
  z-index: 60;
}
.nav-parent:hover .sub-nav,
.nav-parent:focus-within .sub-nav { display: block; }
.sub-nav a {
  display: block;
  padding: 9px 12px;
  color: var(--ink);
  text-decoration: none;
  border-radius: 6px;
  white-space: nowrap;
}
.sub-nav a:hover { background: var(--accent-soft); color: var(--accent-dark); }
.sub-nav a.active { color: var(--accent); font-weight: 600; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.mobile-nav {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 10px 22px 16px;
  max-height: 70vh;
  overflow-y: auto;
}
.mobile-nav a {
  display: block;
  padding: 11px 6px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a.active { color: var(--accent); font-weight: 600; }
.mobile-nav a:last-child { border-bottom: none; }

/* ---------- Hero-Bereiche ---------- */

.hero {
  background: linear-gradient(180deg, var(--paper-cool), var(--paper));
  border-bottom: 1px solid var(--line);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 44px;
  align-items: center;
  padding: 56px 0;
}
.hero-kicker {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 14px;
}
.hero h1 { margin-bottom: 18px; }
.hero-lead { font-size: 1.13rem; color: var(--ink-soft); }
.hero-actions { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-media img,
.hero-media .photo-missing { border-radius: 14px; box-shadow: 0 18px 40px rgba(36, 49, 58, 0.16); }

.page-hero {
  background: linear-gradient(180deg, var(--paper-cool), var(--paper));
  border-bottom: 1px solid var(--line);
  padding: 40px 0 34px;
}
.breadcrumb {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 10px;
}
.page-hero h1 { margin-bottom: 12px; }
.page-hero p { max-width: 780px; color: var(--ink-soft); font-size: 1.08rem; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-size: 0.98rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-ghost { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn-ghost:hover { background: var(--accent-soft); color: var(--accent-dark); }

/* ---------- Abschnitte & Karten ---------- */

.section { padding: 52px 0; }
.section-warm { background: var(--paper-cool); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head .kicker {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 8px;
}
.section-head p { color: var(--ink-soft); margin-top: 10px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.card-grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }

.topic-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.topic-card:hover {
  box-shadow: 0 14px 32px rgba(36, 49, 58, 0.13);
  transform: translateY(-2px);
  color: var(--ink);
}
.topic-card img,
.topic-card .photo-missing { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }
.topic-card-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; }
.topic-card-body h3 { color: var(--accent-dark); }
.topic-card-body p { font-size: 0.98rem; color: var(--ink-soft); }
.topic-card-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
  padding-top: 6px;
}

.content-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 30px 32px;
}
.content-card h2 { margin-top: 1.4em; margin-bottom: 0.5em; }
.content-card h2:first-child { margin-top: 0; }
.content-card h3 { margin-top: 1.2em; margin-bottom: 0.4em; }
.content-card ul, .content-card ol { padding-left: 1.3em; margin: 0.6em 0 1em; }
.content-card li { margin-bottom: 0.35em; }
.content-card figure { margin: 1.4em 0; }
.content-card figure img, .content-card figure .photo-missing { border-radius: 10px; }
.content-card figcaption { font-size: 0.85rem; color: var(--ink-soft); margin-top: 8px; }

/* ---------- Artikel-Layout mit Seitenleiste ---------- */

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}
/* Grid-Items schrumpfen sonst nicht unter ihre Mindestbreite – breite Tabellen
   würden das Raster sprengen statt in .table-wrap zu scrollen. */
.article-main, .content-card, .table-wrap { min-width: 0; }
.article-side { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 96px; }

.side-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
  font-size: 0.98rem;
}
.side-box h4 { margin-bottom: 10px; }
.side-box ul { list-style: none; }
.side-box ul li { padding: 5px 0; border-bottom: 1px dashed var(--line); }
.side-box ul li:last-child { border-bottom: none; }
.side-box-accent { background: var(--accent-soft); border-color: #c6dedb; }

.check-list { list-style: none; }
/* .side-box ul li setzt padding: 5px 0 – deshalb hier mit gleicher Spezifität nachziehen,
   sonst liegt das Häkchen auf dem Text. */
.check-list li,
.side-box .check-list li { padding-left: 26px; position: relative; }
.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Tabellen ---------- */

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.98rem;
}
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th {
  background: var(--accent);
  color: #fff;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--paper); }

/* ---------- Info- und Merkkästen ---------- */

.info-box {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 18px 22px;
  margin: 1.4em 0;
  font-size: 0.99rem;
}
.info-box strong:first-child { color: var(--accent-dark); }

.fact-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 1.6em 0; }
.fact-tile {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 22px;
  text-align: center;
}
.fact-tile strong { display: block; font-size: 1.5rem; color: var(--accent); }
.fact-tile span { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- FAQ ---------- */

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 16px 22px;
  font-weight: 700;
  font-size: 1.02rem;
  list-style: none;
  position: relative;
  padding-right: 48px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1.4rem;
}
.faq-item[open] summary::after { content: '–'; }
.faq-item .faq-answer { padding: 0 22px 18px; color: var(--ink-soft); }

/* ---------- Partner-Slot (Backlinkseller) ---------- */

.partner-slot { padding: 26px 0; }
.partner-slot-box {
  background: var(--paper-cool);
  border: 1px dashed var(--line);
  border-radius: 12px;
  padding: 18px 24px;
}
.partner-slot-label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 8px;
}
.partner-slot-content { font-size: 0.95rem; }

/* ---------- Bild-Platzhalter (bis Flux-Bilder da sind) ---------- */

.photo-missing {
  background:
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(14, 107, 99, 0.05) 12px 24px),
    linear-gradient(160deg, var(--paper-cool), #dcebe8);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  padding: 28px 20px;
  min-height: 220px;
  aspect-ratio: 3 / 2;
  width: 100%;
  color: var(--ink-soft);
}
.photo-missing strong { font-size: 1.1rem; color: var(--ink); }
.photo-missing small { font-size: 0.8rem; max-width: 320px; }
.missing-badge {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 3px 12px;
}

/* ---------- Hinweis-Streifen & Footer ---------- */

.disclaimer-strip {
  background: var(--paper-cool);
  border-top: 1px solid var(--line);
  padding: 18px 0;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.footer {
  background: #16262b;
  color: #c2d2d3;
  font-size: 0.95rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding: 46px 22px 30px;
}
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.footer a { display: block; color: #c2d2d3; text-decoration: none; padding: 4px 0; }
.footer a:hover { color: #fff; text-decoration: underline; }
.footer p { margin-top: 14px; color: #9db1b3; }
.footer-brand { filter: brightness(0) invert(0.92); margin-bottom: 4px; }
.footer-contact-line { display: block; padding: 4px 0; }
.trust-row { display: flex; gap: 14px; margin-top: 16px; font-size: 0.85rem; color: #9db1b3; flex-wrap: wrap; }
.footer-bottom {
  border-top: 1px solid #2e424a;
  padding-top: 18px;
  padding-bottom: 24px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: #9db1b3;
}
.footer-bottom a { display: inline; padding: 0; }

/* ---------- Rechtstexte ---------- */

.legal-text { font-size: 1rem; }
.legal-text h2 { font-size: 1.35rem; }

/* ---------- Responsive ---------- */

@media (max-width: 1080px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }
}

@media (max-width: 980px) {
  .hero-inner { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 40px 0; }
  .card-grid, .card-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: minmax(0, 1fr); }
  .article-side { position: static; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  body { font-size: 18px; }
  .hide-mobile { display: none; }
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.4rem; }
  .card-grid, .card-grid-2, .card-grid-4 { grid-template-columns: minmax(0, 1fr); }
  .fact-row { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .content-card { padding: 24px 20px; }
  .brand-logo { width: 220px; height: auto; }
  th, td { padding: 10px 12px; }
}