/* ============================================================
   TRUTZ.IO — DESIGN SYSTEM CSS · Design 2.0
   Abgeleitet aus src/design/design-2.0-regeln.md. Nur ein Modus:
   Screen Dark. Design 2.0 kennt kein Light Theme.
   Schriften eingebettet: Space Grotesk 400/500/600/700 · Space Mono 400
   Überschriften folgen der goldenen-Schnitt-Skala (φ je Ebene), Grün bleibt
   an Mono-Elemente gekoppelt (Code), Amber markiert Hinweise.
   ============================================================ */

/* ---------- Fonts (eingebettet, WOFF2) ---------- */
@font-face {
  font-family: 'Space Grotesk';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/SpaceGrotesk-Regular.woff2') format('woff2');
}
@font-face {
  font-family: 'Space Grotesk';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/SpaceGrotesk-Medium.woff2') format('woff2');
}
@font-face {
  font-family: 'Space Grotesk';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/SpaceGrotesk-SemiBold.woff2') format('woff2');
}
@font-face {
  font-family: 'Space Grotesk';
  font-weight: 700;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/SpaceGrotesk-Bold.woff2') format('woff2');
}
@font-face {
  font-family: 'Space Mono';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('../fonts/SpaceMono-Regular.woff2') format('woff2');
}

/* ---------- Token ---------- */
:root {
  /* Screen Dark */
  --bg-base: #0B0F0D;
  --bg-surface: #1B231D;
  --border: #233029;
  --text-primary: #E8F0EA;
  --text-secondary: #8A9A8E;
  --accent-green: #3DFF7E;
  --accent-amber: #FFB454;

  /* Typo */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'Space Mono', ui-monospace, 'Courier New', monospace;

  /* Spacing (8-Punkt) */
  --s-1: 8px;  --s-2: 16px; --s-3: 24px; --s-4: 32px;
  --s-5: 40px; --s-6: 48px; --s-8: 64px; --s-12: 96px;

  /* Grid */
  --gutter: 24px;                /* Basiseinheit für Grid/Layout */
  --radius: 8px;
  --wrap-max: 1128px;
}

/* ---------- Basis ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
}

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

a {
  color: var(--text-primary);
  text-decoration-color: var(--accent-green);
  text-underline-offset: 3px;
}
a:hover { text-decoration-thickness: 2px; }

li.toc-entry a { 
  color: var(--text-secondary); 
  text-decoration: none;
}

::selection { background: var(--accent-green); color: #0B0F0D; }

/* ---------- Layout ---------- */
.wrap {
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding-inline: var(--s-3);
}

/* 12-Spalten-Grid, Gutter 24 */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}
.col-4 { grid-column: span 4; }
.col-6 { grid-column: span 6; }
@media (max-width: 880px) {
  .col-4, .col-6 { grid-column: span 6; }
}
@media (max-width: 560px) {
  .col-4, .col-6 { grid-column: span 12; }
}

/* ---------- Typo-Skala ---------- */
h1 {
  font-size: 68px;
  line-height: 72px;
  font-weight: 700;
  margin: 48px 0 24px;
}

h2 {
  font-size: 42px;
  line-height: 48px;
  font-weight: 600;
  margin: 48px 0 24px;
}

h3 {
  font-size: 26px;
  line-height: 36px;
  font-weight: 500;
  margin: 36px 0 24px;
}

p {
  margin: 0 0 24px;
  max-width: 64ch;
}

article {
  max-width: 64ch;            /* ~64ch Lesebreite */
  margin-inline: auto;
}

/* ---------- Komponenten ---------- */
/* Button, übernommen aus src/design/example.css */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 16px;
  text-decoration: none;
  cursor: pointer;
}
a:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}

/* Karte */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--s-4);
}
.card .t-caption { color: var(--text-secondary); }
.card h3 { margin-block: var(--s-2) var(--s-1); }
.card p { color: var(--text-secondary); font-size: 15px; }

/* Code-Block: dunkle Insel */
.code {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: #3DFF7E;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 24px;               /* Design-2.0-Code-Zeilenhöhe, 2 × 12 */
  padding: var(--s-3) var(--s-4);
  border-radius: 6px;
  overflow-x: auto;
}
.code .cmt { color: #6a7a6e; }
.code .out { color: #E8F0EA; }

/* Merksatz / Note */
.note {
  border-left: 3px solid var(--accent-amber);
  padding-left: var(--s-2);
  color: var(--text-secondary);
  font-size: 13px;
  max-width: 58ch;
}

/* Datum als Terminal-Zeile */
.date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  display: block;
  margin-top: var(--s-3);
}
.date::before {
  content: "$ date: ";
  color: var(--accent-green);
  opacity: 0.85;
}

/* ---------- Fließtext-Elemente ---------- */
ul, ol { padding-left: 1.4em; }
li { margin-top: var(--s-1); }
li::marker { color: var(--accent-green); font-family: var(--font-mono); }

strong { color: var(--text-primary); }
em { font-style: italic; }

/* Blockquote = Merksatz-Note aus dem System */
blockquote {
  border-left: 3px solid var(--accent-green);
  padding-left: var(--s-2);
  color: var(--text-secondary);
  font-size: 16px;
}
blockquote p { margin: 0; }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin-block: var(--s-6);
}

img {
  border: 1px solid var(--border);
  border-radius: 8px;
}
figcaption {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: var(--s-1);
}

/* Tabelle */
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th {
  font-family: var(--font-mono); font-weight: 400; font-size: 12px;
  text-align: left; color: var(--text-secondary);
  padding: var(--s-1) var(--s-2);
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.05em;
}
td { padding: var(--s-2); border-bottom: 1px solid var(--border); }
td.token { font-family: var(--font-mono); font-size: 13px; white-space: nowrap; }

/* ---------- Header / Footer ---------- */
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-3);
  padding-block: var(--s-3);
  border-bottom: 1px solid var(--border);
}
.logo { display: inline-flex; align-items: center; gap: var(--s-2); text-decoration: none; }
.logo-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.logo-word .logo-io { color: var(--accent-green); }
.site-header .logo svg { height: 28px; width: 28px; }
.site-nav { display: flex; gap: var(--s-4); flex-wrap: wrap; }
.site-nav a {
  text-decoration: none;
  font-size: 15px;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text-primary); }

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: var(--s-6);
  padding-block: var(--s-4) var(--s-8);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: var(--s-2);
  font-family: var(--font-mono); font-size: 12px;
  color: var(--text-secondary);
}
.site-footer .logo svg { height: 20px; width: 20px; }
.site-footer .logo-word { font-size: 15px; }

/* ---------- Utilities ---------- */
.mt-2 { margin-top: var(--s-2); } .mt-3 { margin-top: var(--s-3); }
.mt-4 { margin-top: var(--s-4); } .mt-6 { margin-top: var(--s-6); }
.mb-1 { margin-bottom: var(--s-1); } .mb-2 { margin-bottom: var(--s-2); }
.mb-4 { margin-bottom: var(--s-4); } .mb-6 { margin-bottom: var(--s-6); }
.text-secondary { color: var(--text-secondary); }
.flex { display: flex; gap: var(--s-2); flex-wrap: wrap; align-items: center; }