/* ============================================================
   BOTRISOFT — Design Tokens
   Technisches, dunkles Theme mit Cyan-Signatur
   ============================================================ */

:root {
  /* Farben — oklch-basiert */
  --bg-0: #111721;             /* Basis — Graphit-Blau */
  --bg-1: #19212d;             /* Panels */
  --bg-2: #212b39;             /* erhöhte Flächen */
  --bg-3: #2d3947;             /* Hover / Border light */
  --line: rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.19);
  --grid-line: rgba(140, 205, 255, 0.06);

  --fg-0: #f6f9fc;             /* Titel */
  --fg-1: #d5dde7;             /* Body */
  --fg-2: #9aa6b6;             /* Sekundär */
  --fg-3: #717d8d;             /* Tertiär / Labels */

  --cyan: oklch(84% 0.14 210);    /* Signatur */
  --cyan-dim: oklch(70% 0.12 210);
  --cyan-deep: oklch(45% 0.14 220);
  --cyan-glow: oklch(84% 0.14 210 / 0.18);

  --accent-warn: oklch(80% 0.14 65);  /* subtiler Kontrast */

  /* Typo */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Spacing */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;

  --page-max: 1280px;
  --page-pad: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--fg-1);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(ellipse at 20% -10%, oklch(52% 0.13 225 / 0.20), transparent 62%),
    radial-gradient(ellipse at 90% 10%, oklch(65% 0.11 200 / 0.10), transparent 58%),
    var(--bg-0);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  color: var(--fg-0);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0;
}

h1 { font-size: clamp(44px, 6vw, 76px); line-height: 1.02; letter-spacing: -0.035em; }
h2 { font-size: clamp(30px, 3.6vw, 48px); line-height: 1.08; letter-spacing: -0.03em; }
h3 { font-size: clamp(20px, 1.8vw, 24px); line-height: 1.25; }
h4 { font-size: 16px; line-height: 1.3; }

p { margin: 0; color: var(--fg-1); }

/* ======= Utility: Mono Label ======= */
.label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.label::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-glow);
}
.label.plain::before { display: none; }

.mono { font-family: var(--font-mono); }

.kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--fg-2);
  background: var(--bg-2);
}

/* ======= Layout ======= */
.page {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--page-pad);
}

.section {
  padding: clamp(80px, 10vw, 140px) 0;
  position: relative;
}

.section--tight { padding: clamp(56px, 7vw, 96px) 0; }

.divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ======= Nav ======= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--bg-0) 82%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 16px var(--page-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-0);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  font-weight: 500;
}

.brand-mark { width: 26px; height: 26px; display: block; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-2);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--fg-0); background: var(--bg-2); }
.nav-links a.active { color: var(--cyan); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-0);
  background: var(--bg-2);
  white-space: nowrap;
  flex-shrink: 0;
  transition: border-color .15s, background .15s;
}
.nav-cta:hover { border-color: var(--cyan); background: var(--bg-3); }
.nav-cta .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2.4s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ======= Button ======= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s, background .15s, border-color .15s;
  text-decoration: none;
  background: var(--fg-0);
  color: var(--bg-0);
}
.btn:hover { transform: translateY(-1px); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translate(3px, -3px); }

.btn--ghost {
  background: transparent;
  color: var(--fg-0);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--cyan); background: var(--bg-2); }

.btn--cyan {
  background: var(--cyan);
  color: #051019;
}

/* ======= Card ======= */
.card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: border-color .2s, transform .2s;
}
.card:hover { border-color: var(--line-strong); }

.card-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.1em;
}

/* ======= Footer ======= */
.footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 40px;
  margin-top: 80px;
  color: var(--fg-2);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

.footer h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fg-3);
  margin-bottom: 16px;
  font-weight: 500;
}

.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 10px; }
.footer a { color: var(--fg-1); }
.footer a:hover { color: var(--cyan); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
}

/* ======= Grid-Hintergrund ======= */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, black 30%, transparent 80%);
  pointer-events: none;
}

/* ======= Artikel ======= */
.article-hero { padding: clamp(52px,7vw,84px) 0 0; position: relative; overflow: hidden; }
.crumbs { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--fg-3); display: flex; gap: 10px; flex-wrap: wrap; }
.crumbs a { color: var(--fg-2); }
.crumbs a:hover { color: var(--cyan); }
.article-hero h1 { font-size: clamp(34px,4.4vw,56px); max-width: 24ch; margin-top: 26px; }
.article-meta { display: flex; gap: 20px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--fg-3); margin-top: 28px; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.prose { max-width: 74ch; padding: 44px 0 0; }
.prose > * + * { margin-top: 22px; }
.prose p { color: var(--fg-1); font-size: 17px; line-height: 1.75; text-wrap: pretty; }
.prose .stand { font-size: 20px; color: var(--fg-0); line-height: 1.6; }
.prose h2 { font-size: clamp(24px,2.4vw,31px); margin-top: 52px; }
.prose h3 { font-size: 20px; margin-top: 38px; }
.prose ul, .prose ol { color: var(--fg-1); font-size: 17px; line-height: 1.7; padding-left: 22px; }
.prose li + li { margin-top: 10px; }
.prose li::marker { color: var(--cyan-dim); font-family: var(--font-mono); font-size: 14px; }
.prose a { color: var(--cyan); text-decoration: underline; text-decoration-color: var(--cyan-deep); text-underline-offset: 3px; }
.prose strong { color: var(--fg-0); font-weight: 500; }
.prose pre { background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; overflow-x: auto; font-family: var(--font-mono); font-size: 13px; line-height: 1.65; color: var(--fg-1); }
.prose code { font-family: var(--font-mono); font-size: .9em; color: var(--cyan); }
.prose pre code { color: inherit; }
.prose blockquote { margin: 32px 0; padding: 22px 26px; background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius-lg); }
.prose blockquote p { color: var(--fg-0); font-size: 18px; line-height: 1.6; }
.note { background: color-mix(in oklab, var(--cyan) 5%, var(--bg-1)); border: 1px solid rgba(142,227,255,.24); border-radius: var(--radius-lg); padding: 22px 24px; }
.note .k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); }
.note p { font-size: 15.5px; margin-top: 10px; color: var(--fg-1); line-height: 1.65; }
.article-cta { max-width: 74ch; margin-top: 64px; padding: 32px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--bg-1); }
.article-cta h3 { font-size: 20px; }
.article-cta p { color: var(--fg-2); margin-top: 12px; font-size: 15.5px; line-height: 1.65; }
.related { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 74ch; margin-top: 24px; }
@media (max-width: 620px) { .related { grid-template-columns: 1fr; } }
.related a { display: block; background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; transition: border-color .15s; }
.related a:hover { border-color: var(--cyan); }
.related .k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--fg-3); }
.related strong { display: block; color: var(--fg-0); font-weight: 500; margin-top: 8px; font-size: 15.5px; line-height: 1.4; }

/* ======= Mobile-Nav ======= */
.nav-toggle { display: none; align-items: center; justify-content: center; width: 38px; height: 38px; border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--bg-2); color: var(--fg-0); cursor: pointer; flex-shrink: 0; padding: 0; }
.nav-toggle:hover { border-color: var(--cyan); }
.nav-toggle svg { width: 16px; height: 16px; stroke: currentColor; stroke-width: 1.6; fill: none; stroke-linecap: round; }
.nav-toggle .ico-x { display: none; }
.nav.open .nav-toggle .ico-x { display: block; }
.nav.open .nav-toggle .ico-menu { display: none; }

.nav-panel { display: none; border-top: 1px solid var(--line); }
.nav.open .nav-panel { display: block; }
.nav-panel ul { list-style: none; margin: 0 auto; padding: 6px var(--page-pad) 20px; max-width: var(--page-max); }
.nav-panel a { display: block; padding: 13px 0; font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-1); border-bottom: 1px solid var(--line); }
.nav-panel a:hover, .nav-panel a.active { color: var(--cyan); }

/* ======= Responsive ======= */
@media (max-width: 1140px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 8px 9px; font-size: 11px; }
}
@media (max-width: 1000px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-cta { margin-left: auto; }
}
@media (max-width: 460px) {
  .nav-cta { display: none; }
}