/* mkolb.de — Premium Info-Pages Stylesheet
   Emerald/Teal Glass-Gradient Design System. Light + Dark via prefers-color-scheme.
   Kein JS-Framework, kein CDN, kein externer Font. Pure CSS + ~30 Zeilen JS (app.js). */

:root {
  --bg: #f8faf9;
  --surface: rgba(255,255,255,0.72);
  --surface-2: rgba(255,255,255,0.5);
  --border: rgba(255,255,255,0.6);
  --text: #0a0a0a;
  --text-2: #3f3f46;
  --muted: #71717a;
  --accent: #10b981;
  --accent-2: #059669;
  --accent-3: #14b8a6;
  --accent-soft: rgba(16,185,129,0.12);
  --accent-grad: linear-gradient(135deg, #10b981 0%, #14b8a6 50%, #2dd4bf 100%);
  --accent-grad-soft: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(45,212,191,0.12));
  --glow: 0 8px 32px rgba(16,185,129,0.2);
  --shadow: 0 12px 40px rgba(16,185,129,0.10);
  --glass-blur: blur(16px) saturate(130%);
  --glass-shadow: 0 10px 36px rgba(16,185,129,0.08), inset 0 1px 0 rgba(255,255,255,0.6);
  --bg-grad: radial-gradient(100% 80% at 10% 0%, rgba(16,185,129,0.06) 0%, transparent 55%),
             radial-gradient(100% 80% at 90% 100%, rgba(45,212,191,0.05) 0%, transparent 50%),
             var(--bg);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #080c0a;
    --surface: rgba(20,28,24,0.6);
    --surface-2: rgba(28,36,32,0.45);
    --border: rgba(255,255,255,0.08);
    --text: #fafafa;
    --text-2: #d4d8d6;
    --muted: #8b958f;
    --accent: #34d399;
    --accent-2: #10b981;
    --accent-3: #2dd4bf;
    --accent-soft: rgba(52,211,153,0.14);
    --accent-grad: linear-gradient(135deg, #34d399 0%, #2dd4bf 50%, #5eead4 100%);
    --accent-grad-soft: linear-gradient(135deg, rgba(52,211,153,0.18), rgba(94,234,212,0.12));
    --glow: 0 8px 32px rgba(52,211,153,0.25);
    --shadow: 0 14px 44px rgba(0,0,0,0.5);
    --glass-shadow: 0 14px 44px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.06);
    --bg-grad: radial-gradient(100% 80% at 10% 0%, rgba(16,185,129,0.10) 0%, transparent 55%),
               radial-gradient(100% 80% at 90% 100%, rgba(45,212,191,0.08) 0%, transparent 50%),
               var(--bg);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg-grad); background-attachment: fixed; color: var(--text);
  line-height: 1.65; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; }

/* Animated floating orbs (decorative background) */
.orb { position: fixed; border-radius: 50%; filter: blur(80px); opacity: 0.15; z-index: 0;
  pointer-events: none; animation: float 20s ease-in-out infinite; }
.orb-1 { width: 400px; height: 400px; top: -100px; right: -100px;
  background: radial-gradient(circle, var(--accent), transparent 70%); }
.orb-2 { width: 300px; height: 300px; bottom: 10%; left: -80px;
  background: radial-gradient(circle, var(--accent-3), transparent 70%); animation-delay: -7s; }
.orb-3 { width: 250px; height: 250px; top: 50%; right: 10%;
  background: radial-gradient(circle, var(--accent-2), transparent 70%); animation-delay: -14s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
@media (prefers-reduced-motion: reduce) { .orb { animation: none; } }

/* Layout */
.container { max-width: 880px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* Sticky glass navigation */
nav { position: sticky; top: 0; z-index: 100;
  background: var(--surface); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border); box-shadow: 0 1px 12px rgba(0,0,0,0.03); }
nav .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
nav .logo { font-weight: 800; font-size: 1.1rem; background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
nav ul { display: flex; gap: 24px; list-style: none; }
nav a { color: var(--text-2); text-decoration: none; font-weight: 600; font-size: 0.9rem;
  transition: color var(--transition); }
nav a:hover, nav a.active { color: var(--accent-2); }
@media (max-width: 640px) { nav ul { gap: 14px; } nav a { font-size: 0.82rem; } }

/* Hero section */
.hero { text-align: center; padding: 80px 0 60px; position: relative; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 800; line-height: 1.1;
  letter-spacing: -0.03em; margin-bottom: 16px; }
.hero h1 .grad { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; }
.hero p { font-size: clamp(1.05rem, 2.5vw, 1.3rem); color: var(--muted); max-width: 620px;
  margin: 0 auto 32px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px;
  background: var(--accent-soft); border: 1px solid var(--border); border-radius: var(--radius-pill);
  font-size: 0.82rem; font-weight: 600; color: var(--accent-2); margin-bottom: 24px;
  backdrop-filter: blur(8px); }

/* CTA buttons */
.cta { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px;
  background: var(--accent-grad); color: #fff; border: none; border-radius: var(--radius-pill);
  font-weight: 700; font-size: 1.05rem; text-decoration: none; box-shadow: var(--glow);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition); }
.cta:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 12px 40px rgba(16,185,129,0.3); text-decoration: none; }
.cta-secondary { display: inline-flex; align-items: center; gap: 6px; padding: 12px 24px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-pill);
  color: var(--text-2); font-weight: 600; font-size: 0.95rem; text-decoration: none;
  backdrop-filter: blur(8px); transition: border-color var(--transition), color var(--transition); }
.cta-secondary:hover { border-color: var(--accent); color: var(--accent-2); text-decoration: none; }
.cta-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Sections */
section { padding: 48px 0; }
section h2 { font-size: clamp(1.6rem, 3vw, 2rem); font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 16px; }
section h2 .grad { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; }
section h3 { font-size: 1.15rem; font-weight: 700; margin: 28px 0 10px; }
section p { color: var(--text-2); margin-bottom: 14px; }
section ul { margin: 0 0 20px 20px; }
section li { margin: 10px 0; color: var(--text-2); }
section li strong { color: var(--text); }

/* Glass cards */
.glass-card { background: var(--surface); backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--glass-shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.glass-card:hover { transform: translateY(-4px); border-color: var(--accent);
  box-shadow: var(--glow), var(--glass-shadow); }

/* Product grid (hub) */
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; margin: 32px 0; }
.product-card { padding: 32px; }
.product-card .icon { font-size: 2.5rem; margin-bottom: 12px; display: block; }
.product-card h3 { margin: 0 0 8px; font-size: 1.3rem; }
.product-card h3 a { color: var(--accent-2); text-decoration: none; }
.product-card h3 a:hover { text-decoration: underline; }
.product-card p { font-size: 0.94rem; margin-bottom: 16px; }
.product-card .badges { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.product-card .product-links { display: flex; gap: 10px; }

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px;
  border-radius: var(--radius-pill); font-size: 0.76rem; font-weight: 700;
  background: var(--accent-soft); color: var(--accent-2); border: 1px solid var(--border); }
.badge-e2e { background: rgba(99,102,241,0.12); color: #6366f1; }
.badge-ai { background: rgba(245,158,11,0.12); color: #f59e0b; }

/* Feature grid */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin: 28px 0; }
.feature-item { padding: 24px; }
.feature-item .feature-icon { font-size: 1.8rem; margin-bottom: 10px; display: block; }
.feature-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.feature-item p { font-size: 0.88rem; margin: 0; }

/* FAQ */
.faq details { margin: 12px 0; padding: 18px 24px; border-radius: var(--radius-sm); }
.faq summary { font-weight: 700; cursor: pointer; font-size: 1rem; list-style: none;
  display: flex; align-items: center; justify-content: space-between; }
.faq summary::after { content: "▸"; color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; }
.faq details[open] summary::after { transform: rotate(90deg); }
.faq details[open] { border-color: var(--accent); }
.faq p { margin-top: 10px; }

/* Privacy section */
.privacy-box { padding: 32px; margin: 28px 0; }
.privacy-box .privacy-flow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.privacy-box .flow-step { padding: 8px 16px; border-radius: var(--radius-pill); font-size: 0.85rem;
  font-weight: 600; background: var(--accent-soft); color: var(--accent-2); border: 1px solid var(--border); }
.privacy-box .flow-arrow { color: var(--muted); font-size: 1.2rem; }
.privacy-box .flow-step.cloud { background: rgba(245,158,11,0.12); color: #f59e0b; }

/* Footer */
footer { padding: 40px 0; text-align: center; color: var(--muted); font-size: 0.85rem;
  border-top: 1px solid var(--border); margin-top: 60px; position: relative; z-index: 1; }
footer a { color: var(--accent-2); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Scroll-triggered fade-in animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* Responsive */
@media (max-width: 640px) {
  .hero { padding: 56px 0 40px; }
  .product-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .cta-group { flex-direction: column; align-items: center; }
}