/* ============================================
   Dr. Patrick Rupprecht — KI & Audit
   Stylesheet · Version 1.0
   ============================================ */

/* --- Schriften (lokal gehostet für DSGVO) ---
   Hinweis: Die Inter-WOFF2-Dateien müssen unter
   /assets/fonts/ abgelegt werden. Download:
   https://fonts.bunny.net/family/inter (DSGVO-konformer
   Spiegel von Google Fonts) oder https://rsms.me/inter/
*/
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-regular.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-medium.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/inter-semibold.woff2') format('woff2');
}

/* --- Designsystem-Variablen --- */
:root {
  --c-primary: #0B2545;      /* Marineblau tief, Hero & Headlines */
  --c-secondary: #134074;    /* Marineblau mittel, Akzente */
  --c-tertiary: #8DA9C4;     /* Stahlblau, Hilfstexte auf dunkel */
  --c-light: #EEF4ED;        /* Off-White, sekundäre Sektionen */
  --c-surface: #F7F9FB;      /* helle Sektionsbänder */
  --c-text: #1A1A1A;
  --c-text-muted: #5C677D;
  --c-border: #E5E7EB;
  --c-border-dark: #C7D2DC;
  --c-gold: #C9A961;         /* Sparsame Akzentfarbe */

  --fs-hero: 38px;
  --fs-h2: 24px;
  --fs-h3: 16px;
  --fs-body: 15px;
  --fs-small: 13px;
  --fs-micro: 11px;

  --max-w: 1080px;
  --content-w: 680px;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--c-text);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

/* --- Layout-Container --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
}

/* --- Navigation (Header) --- */
.site-nav {
  background: var(--c-primary);
  padding: 16px 0;
  color: var(--c-light);
}
.site-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand {
  font-weight: 500;
  letter-spacing: 0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.brand::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--c-gold);
  border-radius: 50%;
  display: inline-block;
}
.nav-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
}
.nav-links a {
  opacity: 0.85;
  transition: opacity 0.2s;
}
.nav-links a:hover { opacity: 1; }
@media (max-width: 640px) {
  .nav-links { gap: 18px; font-size: 13px; }
}

/* --- Hero --- */
.hero {
  background: var(--c-primary);
  color: var(--c-light);
  padding: 64px 0 80px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 48px;
  align-items: center;
}
@media (max-width: 760px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero { padding: 48px 0 56px; }
}
.eyebrow {
  font-size: var(--fs-micro);
  color: var(--c-gold);
  letter-spacing: 0.18em;
  font-weight: 500;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: var(--fs-hero);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: #ffffff;
  margin-bottom: 22px;
  max-width: 560px;
}
@media (max-width: 640px) {
  .hero h1 { font-size: 30px; }
}
.hero-lead {
  font-size: 16px;
  color: var(--c-tertiary);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 0.5px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
  font-family: inherit;
}
.btn-primary {
  background: #ffffff;
  color: var(--c-primary);
}
.btn-primary:hover {
  background: var(--c-light);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: #ffffff;
  border-color: var(--c-tertiary);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: #ffffff;
}
.hero-portrait {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 4 / 5;
  background: var(--c-secondary);
  border-radius: var(--radius-md);
  border: 0.5px solid var(--c-tertiary);
  overflow: hidden;
  position: relative;
}
.hero-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-portrait-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--c-tertiary);
  font-size: 11px;
  letter-spacing: 0.1em;
}

/* --- Vertrauensanker-Leiste --- */
.trust-bar {
  background: #ffffff;
  border-bottom: 0.5px solid var(--c-border);
  padding: 18px 0;
}
.trust-bar-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  font-size: var(--fs-micro);
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.trust-item svg {
  width: 16px;
  height: 16px;
  color: var(--c-gold);
}

/* --- Sektion --- */
.section {
  padding: 64px 0;
}
.section--surface { background: var(--c-surface); }
.section--light { background: var(--c-light); }
.section-eyebrow {
  font-size: var(--fs-micro);
  color: var(--c-text-muted);
  letter-spacing: 0.15em;
  font-weight: 500;
  margin-bottom: 8px;
  text-transform: uppercase;
}
.section h2 {
  font-size: var(--fs-h2);
  font-weight: 500;
  color: var(--c-primary);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.section-intro {
  font-size: var(--fs-body);
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 32px;
}

/* --- ISO-Karten-Grid --- */
.iso-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--c-border);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
}
.iso-card {
  background: #ffffff;
  padding: 22px 18px;
  transition: background 0.2s;
}
.iso-card:hover {
  background: #FAFBFC;
}
.iso-tag {
  font-size: 10px;
  color: var(--c-gold);
  letter-spacing: 0.18em;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 10px;
  min-height: 12px;
  display: block;
}
.iso-card-title {
  font-size: 15px;
  color: var(--c-primary);
  font-weight: 500;
  margin-bottom: 6px;
}
.iso-card-sub {
  font-size: 12px;
  color: var(--c-text-muted);
  line-height: 1.5;
}

/* --- Hinweis-Block (Italic, dezent) --- */
.note {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
  font-style: italic;
  margin-top: 8px;
}

/* --- Service-Karten 2-spaltig --- */
.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--c-border);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
@media (max-width: 640px) {
  .service-grid { grid-template-columns: 1fr; }
}
.service-card {
  background: #ffffff;
  padding: 28px 24px;
}
.service-card .icon {
  width: 28px;
  height: 28px;
  color: var(--c-secondary);
  margin-bottom: 14px;
}
.service-card h3 {
  font-size: var(--fs-h3);
  color: var(--c-primary);
  font-weight: 500;
  margin-bottom: 8px;
}
.service-card p {
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.65;
}

/* --- Über-Bereich --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 720px;
}
.about-grid p {
  font-size: var(--fs-body);
  color: var(--c-text);
  line-height: 1.75;
}

/* --- Referenzen-Liste --- */
.ref-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 8px;
}
.ref-list li {
  padding: 16px 0;
  border-bottom: 0.5px solid var(--c-border);
  font-size: 14px;
  color: var(--c-text);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
}
@media (max-width: 640px) {
  .ref-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}
.ref-list li:last-child { border-bottom: none; }
.ref-type {
  font-size: 12px;
  color: var(--c-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* --- Kontaktbereich --- */
.contact-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
@media (max-width: 640px) {
  .contact-block { grid-template-columns: 1fr; gap: 24px; }
}
.contact-block dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 8px 18px;
  font-size: 14px;
  margin-top: 12px;
}
.contact-block dt {
  color: var(--c-text-muted);
  font-weight: 400;
}
.contact-block dd {
  color: var(--c-text);
}
.contact-block dd a {
  color: var(--c-secondary);
  border-bottom: 0.5px solid var(--c-secondary);
  transition: color 0.2s;
}
.contact-block dd a:hover {
  color: var(--c-primary);
}

/* --- Footer --- */
.site-footer {
  background: var(--c-primary);
  color: var(--c-tertiary);
  padding: 32px 0;
  font-size: 12px;
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links a {
  opacity: 0.85;
  transition: opacity 0.2s;
}
.footer-links a:hover { opacity: 1; color: #ffffff; }
.footer-social {
  display: flex;
  gap: 14px;
  align-items: center;
}
.footer-social a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  opacity: 0.85;
}
.footer-social svg {
  width: 16px;
  height: 16px;
}

/* --- Subpage-Layout (Impressum, Datenschutz, Anfrage) --- */
.subpage {
  padding: 56px 0 80px;
}
.subpage-inner {
  max-width: var(--content-w);
  margin: 0 auto;
}
.subpage h1 {
  font-size: 32px;
  font-weight: 500;
  color: var(--c-primary);
  margin-bottom: 16px;
  letter-spacing: -0.015em;
}
.subpage h2 {
  font-size: 18px;
  font-weight: 500;
  color: var(--c-primary);
  margin: 28px 0 10px;
}
.subpage p, .subpage li {
  font-size: 15px;
  color: var(--c-text);
  line-height: 1.7;
  margin-bottom: 12px;
}
.subpage ul {
  padding-left: 22px;
  margin-bottom: 16px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--c-text-muted);
  margin-bottom: 24px;
}
.back-link:hover { color: var(--c-primary); }
.back-link svg { width: 14px; height: 14px; }

/* --- Vortragsanfrage-Box --- */
.inquiry-card {
  background: var(--c-surface);
  border: 0.5px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin: 32px 0;
}
.inquiry-card h2 {
  margin-top: 0;
}
.inquiry-card ul {
  padding-left: 22px;
  margin: 12px 0;
}
.inquiry-mailto-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--c-primary);
  color: #ffffff;
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  margin-top: 12px;
  transition: background 0.2s;
}
.inquiry-mailto-btn:hover {
  background: var(--c-secondary);
}

/* --- Utility --- */
.muted { color: var(--c-text-muted); }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}