/* ===========================================================================
   Claude Code Masterclass – Design-System
   Auf das Marken-System von ki-business-agenten.de umgestellt (Reskin 2026-08-05):
   Weiß + Near-Black + Brand-Blau, Instrument Sans, runde Karten. Eine Quelle der
   Wahrheit für den Look ALLER Lektionsseiten. Tokens gespiegelt aus der Wissen-Site.
   =========================================================================== */

/* Instrument Sans, selbst gehostet (DSGVO + Performance; variabler Font, wght 400–700).
   Dateien in assets/fonts/. Kein fonts.googleapis.com-Request! */
@font-face {
  font-family: "Instrument Sans";
  font-style: normal; font-weight: 400 700; font-stretch: 100%; font-display: swap;
  src: url("fonts/instrument-sans-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Instrument Sans";
  font-style: normal; font-weight: 400 700; font-stretch: 100%; font-display: swap;
  src: url("fonts/instrument-sans-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --bg: #ffffff;
  --bg-soft: #f6f6f8;
  --card: #ffffff;
  --ink: #1f1f1f;
  --ink-soft: #3a3a3f;
  --muted: #6b6b73;
  --line: #e7e7ea;
  --accent: #2929fb;          /* Brand-Blau */
  --accent-ink: #1c1cd6;      /* dunkler für Hover/Links */
  --accent-soft: #ecedff;     /* heller Blau-Tint */
  --good: #1f9d57;
  --good-soft: #e4f6ec;
  --dark: #1f1f1f;            /* dunkle Flächen: Kernbotschaft, CTA, Footer, Sidebar */
  --dark-ink: #e9e9ec;
  --dark-muted: #9a9aa2;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 14px 34px rgba(31,31,31,.07);
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05), 0 6px 16px rgba(31,31,31,.05);
  --radius: 16px;
  --maxw: 880px;
  --font: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, "Cascadia Code", "Consolas", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); line-height: 1.62;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
a { color: var(--accent-ink); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 40px 24px 96px; }

/* ---------- Header ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px;
  font-weight: 600; letter-spacing: .03em; text-transform: uppercase;
  color: var(--accent-ink); background: var(--accent-soft);
  padding: 6px 13px; border-radius: 999px;
}
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.08; margin: 18px 0 12px; letter-spacing: -.022em; font-weight: 700; }
.sub { font-size: 18px; color: var(--muted); margin: 0; max-width: 62ch; }
.meta { margin-top: 22px; font-size: 14px; color: var(--muted); display: flex; gap: 20px; flex-wrap: wrap; }
.meta b { color: var(--ink); font-weight: 600; }

/* ---------- Kernbotschaft (dark callout) ---------- */
.key {
  margin: 38px 0; padding: 28px 30px; background: var(--dark); color: #faf8f5;
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.key .label { font-size: 12px; letter-spacing: .09em; text-transform: uppercase; color: #8f8fff; font-weight: 700; }
.key p { font-size: 22px; line-height: 1.4; margin: 10px 0 0; font-weight: 500; }
.key.accent { background: var(--accent); }
.key.accent p { color: #fff; }
.key.accent .label { color: #fff; opacity: .85; }

/* ---------- Sections ---------- */
h2 {
  font-size: 24px; margin: 54px 0 16px; letter-spacing: -.012em;
  display: flex; align-items: center; gap: 11px;
}
h2 .n {
  font-size: 13px; font-weight: 700; color: var(--accent-ink);
  background: var(--accent-soft); width: 28px; height: 28px; border-radius: 8px;
  display: inline-grid; place-items: center; flex: none;
}
p.lead { font-size: 17px; }

ul.bullets { padding-left: 0; list-style: none; margin: 14px 0; }
ul.bullets li { position: relative; padding-left: 28px; margin: 10px 0; }
ul.bullets li::before {
  content: ""; position: absolute; left: 6px; top: 11px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}
strong { font-weight: 650; }
em { color: var(--ink-soft); }
code {
  font-family: var(--mono); font-size: .88em; background: #eef0f4;
  padding: 2px 6px; border-radius: 6px; color: var(--ink);
}

/* ---------- Compare (Chat vs Agent / Vorher–Nachher) ---------- */
.compare {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: stretch;
  margin: 22px 0; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.compare .col { padding: 24px; }
.compare .col h3 { margin: 12px 0 12px; font-size: 16px; }
.compare .tag { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding: 4px 10px; border-radius: 999px; }
.compare .left .tag { color: var(--muted); background: #eef0f4; }
.compare .right { background: var(--good-soft); }
.compare .right .tag { color: var(--good); background: #d4ecdd; }
.compare .step { font-size: 14.5px; padding: 7px 0; border-bottom: 1px dashed var(--line); }
.compare .step:last-of-type { border-bottom: 0; }
.compare .divider { display: grid; place-items: center; background: var(--bg-soft); width: 48px; color: var(--muted); font-weight: 700; }
.compare .note { margin-top: 14px; font-size: 13px; color: var(--muted); font-style: italic; }

/* ---------- Loop / Ablauf ---------- */
.loop { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 18px 0 4px; }
.loop .node { background: var(--accent-soft); color: var(--accent-ink); font-weight: 650; padding: 10px 16px; border-radius: 10px; font-size: 15px; }
.loop .arr { color: var(--muted); font-size: 18px; }
.loop .back { width: 100%; font-size: 13px; color: var(--muted); font-style: italic; margin-top: 2px; }

/* ---------- Steps (nummerierte Schritte) ---------- */
ol.steps { counter-reset: s; list-style: none; padding-left: 0; margin: 16px 0; }
ol.steps li { position: relative; padding: 4px 0 4px 44px; margin: 10px 0; min-height: 30px; }
ol.steps li::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: 0; top: 2px; width: 30px; height: 30px; border-radius: 9px;
  background: var(--dark); color: #fff; font-weight: 700; font-size: 14px;
  display: grid; place-items: center;
}

/* ---------- Beispiel-Karten ---------- */
.ex { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.ex .card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; box-shadow: var(--shadow-sm); }
.ex .q { font-weight: 600; }
.ex .a { font-size: 14px; color: var(--muted); margin-top: 4px; }

/* ---------- Info / Hinweis-Box ---------- */
.callout { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 18px 22px; margin: 26px 0; box-shadow: var(--shadow-sm); }
.callout.warn { border-left-color: #e0a23b; }
.callout h4 { margin: 0 0 10px; font-size: 15px; }
.callout p:last-child { margin-bottom: 0; }

/* ---------- Scope-Box (Bewusst nicht in dieser Lektion) ---------- */
.scope { background: var(--bg-soft); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 18px 22px; margin: 26px 0; }
.scope h4 { margin: 0 0 10px; font-size: 15px; }
.scope ul { padding-left: 0; list-style: none; margin: 0; }
.scope li { position: relative; padding-left: 20px; margin: 8px 0; font-size: 14.5px; color: var(--ink-soft); }
.scope li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }
.scope a { color: var(--accent-ink); text-decoration: none; font-weight: 600; }
.scope a:hover { text-decoration: underline; }

/* ---------- Pre-Lektion-Hinweis (z.B. zuletzt aufnehmen) ---------- */
.prodnote { font-size: 13.5px; color: var(--accent-ink); background: var(--accent-soft); border-radius: 10px; padding: 10px 14px; display: inline-block; margin-top: 16px; }

/* ---------- Prompt-Kopierbox (Codebox mit Copy-Button) ---------- */
.promptbox { position: relative; background: var(--dark); color: #f2ede6; border-radius: 12px; padding: 16px 18px; margin: 18px 0; box-shadow: var(--shadow-sm); }
.promptbox-label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--dark-muted); font-weight: 700; margin-bottom: 8px; padding-right: 104px; }
.promptbox-text { font-family: var(--mono); font-size: 14px; line-height: 1.55; white-space: pre-wrap; word-break: break-word; margin: 0; color: #f4efe8; }
.promptbox-copy { position: absolute; top: 12px; right: 12px; display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,.1); color: #f2ede6; border: 1px solid rgba(255,255,255,.18); border-radius: 8px; padding: 6px 11px; font-size: 12px; font-weight: 600; cursor: pointer; font-family: var(--font); transition: background .15s ease; }
.promptbox-copy:hover { background: rgba(255,255,255,.2); }
.promptbox-copy.copied { background: var(--good); border-color: var(--good); color: #fff; }
.promptbox-copy svg { width: 14px; height: 14px; }

/* ===========================================================================
   SHARED HEADER (sticky, wie Wissen/Hauptseite) — von app.js injiziert
   =========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.86);
  backdrop-filter: saturate(160%) blur(12px); border-bottom: 1px solid var(--line);
}
.site-header .bar { max-width: 1080px; margin: 0 auto; padding: 0 20px; display: flex; align-items: center; gap: 14px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-logo { height: 24px; width: auto; display: block; }
.brand .tag { font-size: 11px; font-weight: 600; color: var(--muted); letter-spacing: .05em; text-transform: uppercase; padding-left: 12px; border-left: 1px solid var(--line); }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-size: 15px; font-weight: 500; }
.site-nav a:hover { color: var(--accent-ink); }
.btn {
  display: inline-flex; align-items: center; gap: 9px; text-decoration: none;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 15px;
  padding: 11px 20px; border-radius: 9px; border: 0; cursor: pointer;
  transition: transform .14s ease, background .14s ease, box-shadow .14s ease;
}
.btn:hover { background: var(--accent-ink); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn.sm { padding: 9px 16px; font-size: 14px; }

/* Hamburger-Toggle: jetzt im Header (nicht mehr fixed) */
#nav-toggle {
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer; flex: none;
  display: grid; place-items: center; box-shadow: var(--shadow-sm);
  transition: transform .15s ease, background .15s ease;
}
#nav-toggle:hover { transform: translateY(-1px); background: var(--bg-soft); }
#nav-toggle svg { width: 20px; height: 20px; }

/* ===========================================================================
   OFF-CANVAS SIDEBAR (Lektionen) – von app.js erzeugt
   =========================================================================== */
#nav-rail {
  position: fixed; top: 0; left: 0; bottom: 0; width: 312px; z-index: 70;
  background: var(--dark); color: var(--dark-ink);
  transform: translateX(-100%); transition: transform .26s cubic-bezier(.4,0,.2,1);
  display: flex; flex-direction: column; box-shadow: 4px 0 24px rgba(0,0,0,.18);
}
body.nav-open #nav-rail { transform: translateX(0); }
.nav-head { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px; border-bottom: 1px solid rgba(255,255,255,.08); }
.nav-title { font-weight: 700; font-size: 15px; letter-spacing: .01em; color: #fff; }
.nav-title small { display: block; font-weight: 400; font-size: 12px; color: var(--dark-muted); margin-top: 2px; }
.nav-close { background: none; border: 0; color: var(--dark-muted); font-size: 18px; cursor: pointer; padding: 4px 8px; border-radius: 8px; }
.nav-close:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-list { overflow-y: auto; padding: 12px 10px 28px; flex: 1; }
.nav-mod { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: #8a8a92; padding: 16px 12px 6px; }
.nav-item { display: flex; align-items: center; gap: 11px; padding: 8px 12px; border-radius: 9px; color: var(--dark-ink); text-decoration: none; font-size: 14px; line-height: 1.3; }
.nav-item:hover { background: rgba(255,255,255,.06); }
.nav-item.active { background: var(--accent); color: #fff; font-weight: 600; }
.nav-num { flex: none; width: 24px; height: 24px; border-radius: 7px; background: rgba(255,255,255,.08); display: grid; place-items: center; font-size: 12px; font-weight: 600; color: #cfcfd6; }
.nav-item.active .nav-num { background: rgba(255,255,255,.22); color: #fff; }

#nav-backdrop { position: fixed; inset: 0; background: rgba(20,18,16,.42); opacity: 0; pointer-events: none; transition: opacity .26s ease; z-index: 65; }
body.nav-open #nav-backdrop { opacity: 1; pointer-events: auto; }

/* ---------- CTA-Panel (Weg in den Funnel, ans Lektionsende) ---------- */
.cta { background: var(--dark); color: #faf8f5; border-radius: var(--radius); padding: 32px 34px; margin: 60px 0 0; box-shadow: var(--shadow); }
.cta h3 { margin: 0 0 10px; font-size: 23px; letter-spacing: -.014em; color: #fff; }
.cta p { margin: 0 0 20px; color: var(--dark-ink); max-width: 60ch; font-size: 16px; }
.cta .row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.cta .aside { margin: 16px 0 0; font-size: 14px; color: var(--dark-muted); }
.cta .aside a { color: #fff; }

/* ---------- prev/next ---------- */
#lesson-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); }
.lnav { text-decoration: none; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 13px 18px; font-size: 14px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 3px; max-width: 47%; transition: transform .15s ease; }
.lnav:hover { transform: translateY(-2px); }
.lnav.next { text-align: right; margin-left: auto; align-items: flex-end; }
.lnav-dir { font-size: 12px; color: var(--accent-ink); font-weight: 600; }
.lnav-ttl { font-weight: 600; color: var(--ink); }
.lnav.ghost { visibility: hidden; }

/* ===========================================================================
   FOOTER (dunkel, wie Hauptseite) – von app.js injiziert
   =========================================================================== */
.site-footer { background: var(--dark); color: var(--dark-ink); margin-top: 20px; }
.site-footer .inner { max-width: 1080px; margin: 0 auto; padding: 44px 20px 30px; }
.site-footer .cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px; }
.site-footer h4 { margin: 0 0 14px; font-size: 15px; color: #fff; }
.site-footer .links { display: grid; gap: 9px; }
.site-footer a { color: var(--dark-ink); text-decoration: none; font-size: 14.5px; width: fit-content; border-bottom: 1px solid transparent; }
.site-footer a:hover { border-bottom-color: var(--accent); }
.site-footer .muted { color: var(--dark-muted); font-size: 14px; }
.site-footer .foot-bottom { border-top: 1px solid rgba(255,255,255,.08); margin-top: 30px; padding-top: 18px; font-size: 12.5px; color: var(--dark-muted); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ===========================================================================
   INDEX-Seite
   =========================================================================== */
.hero { padding: 30px 0 8px; }
.modgrid { margin: 28px 0; }
.modcard { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; margin: 16px 0; box-shadow: var(--shadow-sm); }
.modcard h3 { margin: 0 0 4px; font-size: 18px; }
.modcard .modsub { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
.lesslist { display: grid; gap: 8px; }
.lesslink { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); padding: 9px 12px; border-radius: 10px; border: 1px solid transparent; }
.lesslink:hover { background: var(--bg-soft); border-color: var(--line); }
.lesslink .ln { flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--accent-soft); color: var(--accent-ink); display: grid; place-items: center; font-size: 13px; font-weight: 700; }

@media (max-width: 640px) {
  .wrap { padding: 32px 18px 80px; }
  .compare { grid-template-columns: 1fr; }
  .compare .divider { width: auto; height: 40px; }
  .ex { grid-template-columns: 1fr; }
  #nav-rail { width: 86vw; }
  .site-nav .hide-sm { display: none; }
  .site-footer .cols { grid-template-columns: 1fr; gap: 26px; }
}