/* Maarten Donders IT-Lösungen — Site-CSS
   Keine externen Fonts/Requests: reiner System-Font-Stack, alles self-contained. */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f8;
  --color-text: #1b2430;
  --color-text-muted: #55606c;
  --color-border: #e2e6ea;
  --color-accent: #0a5c6d;
  --color-accent-dark: #06424e;
  --color-accent-contrast: #ffffff;
  --max-width: 1080px;
  --radius: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #10161c;
    --color-bg-alt: #171f27;
    --color-text: #e8ecef;
    --color-text-muted: #a7b0b9;
    --color-border: #2a333c;
    --color-accent: #4fb8cc;
    --color-accent-dark: #7fd1e0;
    --color-accent-contrast: #08181c;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent-dark); }
a:hover { text-decoration-thickness: 2px; }

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header / Nav */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
  line-height: 1.2;
}

.brand strong {
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  color: var(--color-text);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent-dark);
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: 0.4rem; }
  .main-nav {
    display: none;
    width: 100%;
    order: 3;
  }
  .main-nav.open { display: block; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--color-border);
    margin-top: 1rem;
  }
  .main-nav a {
    display: block;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--color-border);
  }
  .site-header .container { flex-wrap: wrap; }
}

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  line-height: 1.2;
  margin: 0 0 1rem;
  max-width: 22ch;
}

.hero .lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 0 2rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.button-row { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn-primary:hover { background: var(--color-accent-dark); }

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent-dark); }

/* Sections */
section { padding: 3.5rem 0; }
section.alt { background: var(--color-bg-alt); }

.section-heading {
  margin: 0 0 2rem;
}
.section-heading h2 {
  font-size: 1.6rem;
  margin: 0 0 0.5rem;
}
.section-heading p {
  color: var(--color-text-muted);
  max-width: 65ch;
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
}
.card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  list-style: none;
}
.tag-list li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  color: var(--color-text);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--color-border);
}
.timeline li {
  position: relative;
  padding: 0 0 1.75rem 1.5rem;
}
.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.3rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
}
.timeline .when {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.2rem;
}
.timeline h3 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.timeline p { margin: 0; color: var(--color-text-muted); }

/* Contact block */
.contact-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 520px;
}
.contact-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
}
.contact-card dt {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.contact-card dd {
  margin: 0;
  font-weight: 500;
}

/* Legal pages */
.legal h1 { margin-bottom: 0.25rem; }
.legal .updated { color: var(--color-text-muted); font-size: 0.9rem; margin-top: 0; }
.legal h2 { margin-top: 2.25rem; font-size: 1.25rem; }
.legal h3 { margin-top: 1.5rem; font-size: 1.05rem; }
.legal p, .legal li { color: var(--color-text); }
.legal .note {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  margin-top: 2rem;
  background: var(--color-bg-alt);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
}
.footer-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}
.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.footer-nav a:hover { color: var(--color-accent-dark); }
.copyright {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}