/* CONCIVIS SAP AI — „Der geschlossene Kern". Neutral-Schwarz, eine Grotesk, Grün nur als Signal. */
:root {
  --bg: oklch(14.2% 0.003 160);          /* #0A0B0B */
  --surface: oklch(18.5% 0.004 160);
  --ink: oklch(95.5% 0.004 100);         /* nie #fff */
  --ink-2: oklch(76% 0.006 120);
  --ink-3: oklch(64% 0.006 120);
  --signal: oklch(80% 0.16 158);         /* CONCIVIS-Grün als Licht */
  --line: oklch(95.5% 0.004 100 / 0.09);
  --line-2: oklch(95.5% 0.004 100 / 0.18);

  --f-sans: 'Inter Tight', system-ui, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, monospace;
  --f-brand: 'Open Sans', var(--f-sans);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --gutter: clamp(22px, 5vw, 80px);
  --nav-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { background: var(--bg); -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.0625rem/1.6 var(--f-sans); letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased; overflow-x: clip; }
h1, h2, h3 { margin: 0; font-weight: 500; text-wrap: balance; }
p, li, dd { text-wrap: pretty; }
a { color: inherit; }
button { font: inherit; color: inherit; }
::selection { background: var(--signal); color: var(--bg); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; border-radius: 4px; }
.skip { position: fixed; left: 12px; top: -60px; z-index: 50; padding: 10px 16px; border-radius: 6px; background: var(--ink); color: var(--bg); }
.skip:focus { top: 12px; }
.wrap { width: 100%; max-width: 1320px; margin: 0 auto; padding: 0 var(--gutter); }

/* ── Bühne ─────────────────────────────────── */
#scene { position: fixed; inset: 0; width: 100vw; height: 100lvh; z-index: 0; display: block; transition: opacity .9s var(--ease); }
.vignette { position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(120% 90% at 70% 45%, transparent 55%, color-mix(in oklch, var(--bg) 85%, transparent)),
              linear-gradient(90deg, color-mix(in oklch, var(--bg) 88%, transparent) 0%, color-mix(in oklch, var(--bg) 55%, transparent) 30%, transparent 52%); }
.no-webgl #scene, .no-webgl .labels { display: none; }
.labels { position: fixed; inset: 0; z-index: 3; pointer-events: none; }
.lbl { position: absolute; left: 0; top: 0; opacity: 0; display: flex; align-items: center; gap: 10px; white-space: nowrap;
  font: 500 12px/1 var(--f-sans); letter-spacing: .01em; color: var(--ink-2); will-change: transform, opacity; }
.lbl::before { content: ''; width: 18px; height: 1px; background: var(--line-2); }
.lbl.flip { flex-direction: row-reverse; }
.lbl b { color: var(--ink); font-weight: 500; }

/* ── Navigation ────────────────────────────── */
.nav { position: fixed; inset: 0 0 auto; z-index: 20; height: var(--nav-h); display: flex; align-items: center; gap: 40px;
  padding: env(safe-area-inset-top) var(--gutter) 0; border-bottom: 1px solid transparent;
  transition: background .5s var(--ease), border-color .5s var(--ease); }
.nav.is-scrolled { background: color-mix(in oklch, var(--bg) 78%, transparent); backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2); border-color: var(--line); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; min-height: 44px; }
.brand-mark { width: 18px; height: 18px; fill: none; stroke: var(--ink); stroke-width: 3; }
.brand-word { font: 300 14px/1 var(--f-brand); letter-spacing: .2em; }
.brand-word .con { color: var(--ink-2); } .brand-word .civis { font-weight: 800; }
.brand-tag { font-size: 12px; font-weight: 500; color: var(--signal); padding-left: 12px; border-left: 1px solid var(--line-2); letter-spacing: .02em; }
.nav-links { display: flex; gap: 34px; margin-left: auto; }
.nav-links a { font-size: .9rem; color: var(--ink-2); text-decoration: none; padding: 12px 0; transition: color .3s var(--ease); }
.nav-links a:hover, .nav-links a.is-active { color: var(--ink); }

/* ── Buttons ───────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 52px; padding: 0 26px; border-radius: 999px;
  border: 1px solid transparent; font-size: .95rem; font-weight: 500; text-decoration: none; cursor: pointer;
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease); }
.btn:active { transform: scale(.98); }
.btn-solid { background: var(--ink); color: var(--bg); }
.btn-solid:hover { background: var(--signal); }
.btn-ghost { color: var(--ink); padding: 0 6px; }
.btn-ghost::after { content: '→'; transition: transform .4s var(--ease); }
.btn-ghost:hover::after { transform: translateX(4px); }
.btn-line { border-color: var(--line-2); color: var(--ink); }
.btn-line:hover { border-color: var(--ink); }
.btn-sm { min-height: 40px; padding: 0 18px; font-size: .85rem; }
.btn:disabled { opacity: .4; cursor: default; }

/* ── Typografie ────────────────────────────── */
.kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 26px; font-size: .8125rem; font-weight: 500; color: var(--ink-2); letter-spacing: .01em; }
.kicker::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 14px var(--signal); }
.h-display { font-size: clamp(3rem, 5.4vw, 6rem); line-height: .97; letter-spacing: -0.048em; margin-bottom: 30px; max-width: 9.6em; }
.h-display span, .h-section span { display: block; font-weight: 300; color: var(--ink-2); }
.h-section { font-size: clamp(2.3rem, 4.1vw, 4.3rem); line-height: 1; letter-spacing: -0.04em; margin-bottom: 26px; }
.h-step { font-size: clamp(2.2rem, 3.9vw, 4rem); line-height: 1.02; letter-spacing: -0.04em; margin-bottom: 20px; }
.lead { font-size: clamp(1.05rem, 1.25vw, 1.2rem); color: var(--ink-2); max-width: 30em; margin: 0 0 40px; }
.text { color: var(--ink-2); max-width: 32em; margin: 0 0 28px; }
.fine { font-size: .8125rem; color: var(--ink-3); margin: 40px 0 0; }

/* ── Hero ──────────────────────────────────── */
main { position: relative; z-index: 5; }
.hero { min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end; padding-top: calc(var(--nav-h) + 10vh); }
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }
.proof-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 11vh auto 0; padding-top: 0; padding-bottom: 36px; }
.proof-row div { border-top: 1px solid var(--line-2); padding: 20px 24px 0 0; }
.proof-row dt { font-size: clamp(1.6rem, 2.2vw, 2.1rem); font-weight: 500; letter-spacing: -0.03em; }
.proof-row dd { margin: 4px 0 0; font-size: .875rem; color: var(--ink-2); }

/* ── Prinzip (fixiert) ─────────────────────── */
.principle { position: relative; height: 440svh; }
.sticky { position: sticky; top: 0; height: 100svh; display: flex; align-items: center; }
.steps-wrap { position: relative; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; max-width: 540px; }
.step { grid-area: 1 / 1; opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .8s var(--ease); pointer-events: none; }
.step.is-on { opacity: 1; transform: none; pointer-events: auto; }
.step-n { display: block; font: 400 12px/1 var(--f-mono); color: var(--signal); letter-spacing: .08em; margin-bottom: 22px; }
.step p { color: var(--ink-2); font-size: 1.0625rem; max-width: 30em; margin: 0; }
.step-bar { position: relative; width: 180px; height: 1px; background: var(--line-2); margin-top: 44px; }
.step-bar i { position: absolute; inset: 0; background: var(--ink); transform-origin: left; transform: scaleX(0); }

/* ── Blöcke ────────────────────────────────── */
.block { padding: 20vh 0; }
.block-head { max-width: 760px; margin-bottom: 56px; }
.split { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: start; }
.split .block-head { margin-bottom: 0; position: sticky; top: calc(var(--nav-h) + 40px); }

/* ── Reveal ────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 1.1s var(--ease), transform 1.2s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }

/* ── Footer ────────────────────────────────── */
.foot { position: relative; z-index: 5; background: var(--bg); border-top: 1px solid var(--line); font-size: .8125rem; color: var(--ink-3); }
.foot-in { display: flex; flex-wrap: wrap; gap: 14px 32px; align-items: center; padding-top: 28px; padding-bottom: calc(28px + env(safe-area-inset-bottom)); }
.foot nav { display: flex; gap: 24px; margin-left: auto; }
.foot a { text-decoration: none; padding: 12px 0; }
.foot a:hover { color: var(--ink); }

/* ── Responsiv ─────────────────────────────── */
@media (max-width: 900px) {
  :root { --nav-h: 62px; }
  .nav-links, .brand-word, .brand-tag { display: none; }
  .nav .btn { white-space: nowrap; }
  .nav .btn { margin-left: auto; }
  .vignette { background: linear-gradient(0deg, var(--bg) 0%, color-mix(in oklch, var(--bg) 92%, transparent) 46%, transparent 66%); }
  .hero { padding-top: calc(var(--nav-h) + 36svh); }
  .h-display { font-size: clamp(2.5rem, 11vw, 3.6rem); }
  .proof-row { grid-template-columns: 1fr; margin-top: 7vh; }
  .proof-row div { display: flex; align-items: baseline; gap: 14px; padding: 14px 0; }
  .proof-row dd { margin: 0; }
  .sticky { align-items: flex-end; padding-bottom: 9svh; }
  .h-step { font-size: clamp(2rem, 9vw, 2.8rem); }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split .block-head { position: static; }
  .block { padding: 14vh 0; }
  .labels { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}