/* Boltalka – Präsentationsseite. Keine externen Schriften oder Dienste. */
:root {
  --teal: #00796b;
  --teal-light: #5fd6c5;
  --teal-soft: #e3f4f1;
  --ink: #142220;
  --muted: #536663;
  --bg: #f6faf9;
  --card: #ffffff;
  --line: #dce7e4;
  --dark: #0b1513;
  --dark-2: #12211e;
  --red: #e53935;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(10, 40, 35, .10);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e4efec;
    --muted: #9fb4af;
    --bg: #0e1816;
    --card: #15221f;
    --line: #23332f;
    --teal-soft: #13302b;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal); }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 820px; }

/* Kopf */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 21, 19, .82);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.top-row { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: .2px; }
.brand b { color: var(--teal-light); font-weight: 800; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { color: rgba(255, 255, 255, .78); text-decoration: none; font-size: 15px; }
.nav a:hover { color: #fff; }
.langs { display: flex; gap: 4px; }
.langs a {
  color: rgba(255, 255, 255, .7); text-decoration: none; font-size: 13px; font-weight: 600;
  padding: 5px 8px; border-radius: 8px;
}
.langs a.active, .langs a:hover { background: rgba(95, 214, 197, .16); color: var(--teal-light); }

/* Hero */
.hero {
  color: #fff;
  background:
    radial-gradient(900px 500px at 85% 10%, rgba(95, 214, 197, .28), transparent 60%),
    radial-gradient(700px 500px at 0% 100%, rgba(0, 121, 107, .45), transparent 60%),
    linear-gradient(160deg, #0b1513 0%, #0f2925 55%, #0b1513 100%);
  padding: 72px 0 96px;
  overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.kicker {
  display: inline-block; margin: 0 0 18px; padding: 6px 12px; border-radius: 999px;
  background: rgba(95, 214, 197, .14); color: var(--teal-light); font-weight: 600; font-size: 14px;
}
h1 { font-size: clamp(36px, 5.2vw, 60px); line-height: 1.06; margin: 0 0 20px; letter-spacing: -.02em; }
h1 em { font-style: normal; color: var(--teal-light); }
.lead { font-size: clamp(17px, 1.6vw, 20px); color: rgba(255, 255, 255, .82); max-width: 560px; margin: 0 0 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.cta-row.center { justify-content: center; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 14px; font-weight: 700; font-size: 16px; text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn svg { width: 20px; height: 20px; }
.btn.primary { background: var(--teal-light); color: #06231f; box-shadow: 0 8px 24px rgba(95, 214, 197, .35); }
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(95, 214, 197, .45); }
.btn.ghost { color: #fff; border: 1px solid rgba(255, 255, 255, .25); }
.btn.ghost:hover { background: rgba(255, 255, 255, .08); }
.note { font-size: 14px; color: rgba(255, 255, 255, .6); margin: 14px 0 0; }
.section .note { color: var(--muted); }
.note.center { text-align: center; }

.phones { position: relative; height: 560px; }
.phone {
  position: absolute; margin: 0; width: 250px; border-radius: 34px; overflow: hidden;
  border: 9px solid #1c2a27; background: #000;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .45), 0 0 0 1px rgba(255, 255, 255, .06);
}
.phone img { width: 100%; height: auto; }
.phone.back { left: 4%; top: 30px; transform: rotate(-6deg); opacity: .96; }
.phone.front { right: 4%; top: 0; transform: rotate(4deg); }

/* Abschnitte */
.section { padding: 88px 0; }
.section.alt { background: var(--teal-soft); }
.section.dark { background: linear-gradient(160deg, #0b1513, #102b26); color: #fff; }
.section.dark .sub { color: rgba(255, 255, 255, .75); }
h2 { font-size: clamp(28px, 3.4vw, 42px); line-height: 1.15; margin: 0 0 14px; text-align: center; letter-spacing: -.01em; }
.two-col h2 { text-align: left; }
.sub { text-align: center; color: var(--muted); font-size: 18px; max-width: 700px; margin: 0 auto 44px; }
.sub.left { text-align: left; margin-left: 0; }
.grid { display: grid; gap: 18px; }
.features { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); position: relative;
}
.card h3 { margin: 14px 0 6px; font-size: 19px; }
.card p { margin: 0; color: var(--muted); }
.icon {
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--teal), #26a69a); color: #fff;
}
.icon svg { width: 24px; height: 24px; }
.card.highlight { border: 2px solid var(--teal-light); }
.badge {
  position: absolute; top: 18px; right: 18px; background: var(--red); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 9px; border-radius: 999px;
}

/* Galerie */
.gallery { display: flex; justify-content: safe center; gap: 20px; overflow-x: auto; padding: 8px 4px 24px; scroll-snap-type: x mandatory; }
.gallery figure { margin: 0; flex: 0 0 200px; scroll-snap-align: center; text-align: center; }
.gallery .shot {
  border-radius: 28px; overflow: hidden; border: 8px solid #1c2a27; background: #000;
  box-shadow: var(--shadow);
}
.gallery figcaption { margin-top: 12px; font-weight: 600; color: var(--muted); font-size: 15px; }

/* Zello */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checks li { display: flex; gap: 12px; align-items: flex-start; }
.checks li::before {
  content: "✓"; flex: 0 0 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--teal); color: #fff; font-weight: 700; font-size: 14px;
}
.compare-card { background: var(--card); border-radius: var(--radius); padding: 10px 22px 18px; box-shadow: var(--shadow); border: 1px solid var(--line); }
.compare { width: 100%; border-collapse: collapse; font-size: 16px; }
.compare th, .compare td { padding: 14px 8px; border-bottom: 1px solid var(--line); text-align: center; }
.compare th:first-child, .compare td:first-child { text-align: left; }
.compare thead th { font-size: 15px; color: var(--muted); }
.compare thead th:nth-child(2) { color: var(--teal); }
.yes { color: #2e7d32; font-weight: 800; font-size: 20px; }
.no { color: var(--red); font-weight: 800; font-size: 20px; }
.fine { font-size: 13px; color: var(--muted); margin: 14px 0 0; }

/* Sicherheit */
.security { grid-template-columns: repeat(3, 1fr); }
.section.dark .card { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .08); box-shadow: none; }
.section.dark .card p { color: rgba(255, 255, 255, .72); }
.section.dark .icon { background: rgba(95, 214, 197, .16); color: var(--teal-light); }

/* Schritte */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.steps li {
  counter-increment: step; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow);
}
.steps li::before {
  content: counter(step); display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px;
  background: var(--teal); color: #fff; font-weight: 800; margin-bottom: 12px;
}
.steps h3 { margin: 0 0 6px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); }
.code {
  margin: 28px auto 0; max-width: 640px; background: #0b1513; color: #c9f3ec; border-radius: 14px;
  padding: 18px 22px; overflow-x: auto; font-size: 15px; line-height: 1.7;
}

/* FAQ */
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; padding: 0 20px; }
.faq summary { cursor: pointer; padding: 18px 0; font-weight: 700; font-size: 17px; list-style: none; position: relative; padding-right: 30px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 24px; color: var(--teal); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0 0 18px; color: var(--muted); }

/* Fuß */
.foot { background: var(--dark); color: rgba(255, 255, 255, .7); padding: 34px 0; }
.foot-row { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.foot p { margin: 0; flex: 1; font-size: 14px; }

/* Schmale Bildschirme */
@media (max-width: 980px) {
  .nav { display: none; }
  .langs { margin-left: auto; }
  .hero-grid, .two-col { grid-template-columns: 1fr; }
  .phones { height: 470px; max-width: 460px; margin: 0 auto; width: 100%; }
  .phone { width: 210px; }
  .features, .security { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .hero { padding: 48px 0 64px; }
  .features, .security { grid-template-columns: 1fr; }
  .phones { height: 400px; }
  .phone { width: 180px; border-width: 7px; border-radius: 26px; }
  .phone.back { left: 0; }
  .phone.front { right: 0; }
  .section { padding: 64px 0; }
  .brand span { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}