/* cisdu.com – modernes Layout
   Farbwelt: dunkles Petrol/Navy als Primärfarbe, helles Cyan als Akzent */

/* Inter, selbst gehostet (kein Nachladen von fonts.googleapis.com/gstatic.com –
   damit keine Datenübertragung an Google beim Seitenaufruf) */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/inter-latin.woff2') format('woff2');
}

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f7f9;
  --color-text: #1c2b36;
  --color-text-muted: #56697a;
  --color-primary: #0f2d44;
  --color-primary-dark: #081b2b;
  --color-accent: #17a2b8;
  --color-accent-dark: #128193;
  --color-border: #e1e7eb;
  --max-width: 1120px;
  --radius: 10px;
  --shadow: 0 4px 18px rgba(15, 45, 68, 0.08);
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-accent-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-primary);
}

.brand img { height: 44px; width: auto; }

.brand-text {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
  line-height: 1.2;
}

.brand-text span {
  display: block;
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav.main-nav a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 14px;
  border-radius: 6px;
}

nav.main-nav a:hover {
  background: var(--color-bg-alt);
  text-decoration: none;
}

nav.main-nav a.active {
  color: var(--color-accent-dark);
}

nav.main-nav a.cta {
  background: var(--color-accent);
  color: #fff;
  margin-left: 6px;
}
nav.main-nav a.cta:hover { background: var(--color-accent-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-primary);
  margin: 5px 0;
}

@media (max-width: 860px) {
  nav.main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    display: none;
    box-shadow: var(--shadow);
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { padding: 12px 8px; }
  nav.main-nav a.cta { margin-left: 0; text-align: center; }
  .nav-toggle { display: block; }
}

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

.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 64px 0 72px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 800px) {
  .hero .container { grid-template-columns: 1fr; }
}

.hero h1 {
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  line-height: 1.3;
  margin: 0 0 18px;
}

.hero p.lead {
  font-size: 1.08rem;
  color: #cfe3ec;
  margin: 0 0 28px;
  max-width: 46ch;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 24px;
  border-radius: 7px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-dark); text-decoration: none; }

.btn-outline { border-color: rgba(255,255,255,0.55); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

.hero-panel {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 24px;
}
.hero-panel h3 { margin: 0 0 12px; font-size: 1rem; color: #fff; }
.hero-panel ul { margin: 0; padding-left: 20px; color: #cfe3ec; font-size: 0.94rem; }
.hero-panel li { margin-bottom: 8px; }

/* ---------- News / highlight strip ---------- */

.news-strip {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 36px 0;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 800px) { .news-grid { grid-template-columns: 1fr; } }

.news-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}
.news-card .tag {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 4px;
  margin-bottom: 10px;
}
.news-card h3 { margin: 0 0 8px; font-size: 1.02rem; color: var(--color-primary); }
.news-card p { margin: 0; color: var(--color-text-muted); font-size: 0.94rem; }

/* ---------- Sections ---------- */

section.section { padding: 64px 0; }
section.section.alt { background: var(--color-bg-alt); }

.section-head { max-width: 640px; margin: 0 0 36px; }
.section-head .kicker {
  color: var(--color-accent-dark);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.section-head h2 { margin: 0 0 10px; font-size: clamp(1.4rem, 2.4vw, 1.9rem); color: var(--color-primary); }
.section-head p { margin: 0; color: var(--color-text-muted); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 900px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .card-grid { grid-template-columns: 1fr; } }

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card .icon {
  width: 42px; height: 42px;
  border-radius: 9px;
  background: rgba(23,162,184,0.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-accent-dark);
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--color-primary); }
.card p { margin: 0; color: var(--color-text-muted); font-size: 0.95rem; }

.list-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
}
@media (max-width: 620px) { .list-check { grid-template-columns: 1fr; } }
.list-check li {
  padding-left: 28px;
  position: relative;
  color: var(--color-text);
}
.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 0;
  color: var(--color-accent-dark);
  font-weight: 700;
}

/* ---------- Prose (Impressum, Datenschutz, Cloudcomputing, article) ---------- */

.prose { max-width: 760px; }
.prose h1 { color: var(--color-primary); font-size: clamp(1.6rem, 3vw, 2.1rem); margin-bottom: 24px; }
.prose h2 { color: var(--color-primary); font-size: 1.2rem; margin-top: 32px; }
.prose p { margin: 0 0 16px; }
.prose a { text-decoration: underline; }

/* ---------- Download list ---------- */

.download-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 800px) { .download-groups { grid-template-columns: 1fr; } }

.download-groups h3 {
  color: var(--color-primary);
  font-size: 1rem;
  margin: 0 0 12px;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 8px;
}

.download-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 7px;
  margin-bottom: 10px;
  background: #fff;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-text);
}
.download-link:hover { border-color: var(--color-accent); text-decoration: none; }
.download-link .dl-icon { color: var(--color-accent-dark); flex-shrink: 0; }

/* ---------- Table (support docs) ---------- */

table.simple {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 28px;
  font-size: 0.92rem;
}
table.simple th, table.simple td {
  border: 1px solid var(--color-border);
  padding: 8px 10px;
  text-align: center;
}
table.simple th { background: var(--color-bg-alt); color: var(--color-primary); }
table.simple caption {
  text-align: left;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

/* ---------- Calculator ---------- */

.calc-box {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 480px;
  box-shadow: var(--shadow);
}
.calc-box label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.92rem; }
.calc-box select, .calc-box input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  margin-bottom: 18px;
}
.calc-result {
  background: var(--color-bg-alt);
  border-radius: 8px;
  padding: 16px;
  font-size: 0.95rem;
}
.calc-result strong { color: var(--color-primary); }

/* ---------- Partners ---------- */

.partners {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding: 8px 0;
}
.partners img { max-height: 64px; width: auto; filter: grayscale(15%); opacity: 0.9; }
.partners a:hover img { opacity: 1; }

/* ---------- Contact banner ---------- */

.contact-banner {
  background: var(--color-primary);
  color: #fff;
  padding: 46px 0;
}
.contact-banner .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.contact-banner h2 { margin: 0 0 6px; font-size: 1.3rem; }
.contact-banner p { margin: 0; color: #cfe3ec; }
.contact-banner p.b2b-note { margin-top: 4px; font-size: 0.85rem; color: #9fb7c4; }
.contact-banner .phone {
  font-size: 1.05rem;
  font-weight: 600;
  color: #dce8ed;
}

/* ---------- Small print / B2B note ---------- */

.b2b-note {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ---------- Footer ---------- */

footer.site-footer {
  background: var(--color-primary-dark);
  color: #b9c8d1;
  padding: 34px 0 26px;
  font-size: 0.88rem;
}
footer.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
footer.site-footer a { color: #dce8ed; }
footer.site-footer .legal-links a { margin-left: 18px; }
footer.site-footer .legal-links a:first-child { margin-left: 0; }

/* ---------- Notice box ---------- */

.notice {
  background: #fff7e6;
  border: 1px solid #f2d488;
  border-radius: 8px;
  padding: 16px 18px;
  font-size: 0.92rem;
  margin-bottom: 24px;
}