/* =====================================================================
   Das kleinste LLM – Stylesheet
   Farben haben eine Bedeutung: Blau = Werte (vorwärts), Bernstein =
   Gradienten (rückwärts). Heatmaps nutzen eine einfarbige Blau-Rampe.
   ===================================================================== */

@font-face {
  font-family: 'Atkinson Hyperlegible Next';
  src: url('fonts/atkinson-next.woff2') format('woff2');
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: 'Atkinson Hyperlegible Mono';
  src: url('fonts/atkinson-mono.woff2') format('woff2');
  font-weight: 200 800;
  font-display: swap;
}

:root {
  --bg: #F7F8F6;
  --surface: #FFFFFF;
  --sunken: #EEF0EC;
  --ink: #1A2230;
  --muted: #5B6573;
  --line: #D6DBD3;
  --grid: #E6E9E3;
  --fwd: #2B5FD0;
  --fwd-strong: #1D47A6;
  --fwd-soft: #E6EDFB;
  --grad: #BF6A00;
  --grad-soft: #FBEEDC;
  --on-fwd: #FFFFFF;
  --ramp-0: #F1F3F0;
  --ramp-1: #C4D4F4;
  --ramp-2: #7FA3EA;
  --ramp-3: #2F62D2;
  --ramp-4: #142F78;
  --font-sans: 'Atkinson Hyperlegible Next', system-ui, sans-serif;
  --font-mono: 'Atkinson Hyperlegible Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #13171D;
    --surface: #1A1F27;
    --sunken: #10141A;
    --ink: #E3E8EC;
    --muted: #98A3AF;
    --line: #2E3640;
    --grid: #252C35;
    --fwd: #5E8FE6;
    --fwd-strong: #8FB2F0;
    --fwd-soft: #1E2A40;
    --grad: #C47A2A;
    --grad-soft: #33261A;
    --on-fwd: #0E1420;
    --ramp-0: #1C222B;
    --ramp-1: #213456;
    --ramp-2: #2D5299;
    --ramp-3: #5E8FE6;
    --ramp-4: #C2D5FA;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
}

a { color: var(--fwd-strong); text-underline-offset: 0.18em; }
a:hover { color: var(--fwd); }

:focus-visible { outline: 2px solid var(--fwd); outline-offset: 2px; border-radius: 4px; }

code, kbd {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--sunken);
  padding: 0.05em 0.3em;
  border-radius: 4px;
}

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip { position: absolute; left: -999px; top: 8px; }
.skip:focus { left: 16px; z-index: 10; background: var(--surface); padding: 8px 12px; }

/* ---------------------------------------------------------- Fehlermeldung */
.boot-error {
  max-width: 1176px; margin: 16px auto 0; padding: 14px 18px;
  border: 2px solid var(--grad); background: var(--grad-soft); border-radius: 10px;
}
.boot-error p { margin: 6px 0 0; font-family: var(--font-mono); font-size: 0.9rem; overflow-wrap: anywhere; }
.boot-error .boot-error-ua { color: var(--muted); font-size: 0.8rem; }
@media (max-width: 900px) { .boot-error { margin: 12px 16px 0; } }

/* ---------------------------------------------------------- Kopf */
.masthead {
  padding: 40px 32px 28px;
  max-width: 1240px;
  margin: 0 auto;
}
.masthead-title { text-decoration: none; color: inherit; display: inline-block; }
.title-tiles { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.title-word { display: flex; gap: 4px; }
.title-tiles .tile { font-size: clamp(1.5rem, 5vw, 2.75rem); padding: 0.12em 0.22em 0.08em; min-width: 1.15em; }
.title-tiles .tile-char { font-weight: 700; line-height: 1.05; }
.title-tiles .tile-id { font-size: 0.32em; }
.masthead-sub { margin: 16px 0 0; color: var(--muted); max-width: 60ch; }

/* ---------------------------------------------------------- Layout */
.layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}

.steps-nav { position: sticky; top: 24px; align-self: start; }
.steps-nav ol { list-style: none; margin: 0; padding: 0; }
.steps-nav a {
  display: flex; gap: 12px; align-items: center;
  padding: 7px 10px; margin: 0 -10px;
  color: var(--muted); text-decoration: none; border-radius: 6px;
}
.steps-nav a:hover { color: var(--ink); background: var(--sunken); }
.steps-nav a[aria-current='step'] { color: var(--ink); font-weight: 700; }
.step-no {
  font-family: var(--font-mono);
  width: 1.7em; height: 1.7em; flex: none;
  display: inline-grid; place-items: center;
  border: 1px solid var(--line); border-radius: 5px;
  font-size: 0.85em; background: var(--surface);
}
.steps-nav a.is-done .step-no { border-color: var(--fwd); color: var(--fwd-strong); }
/* nach is-done, damit der aktuelle Schritt auch beim erneuten Besuch gewinnt */
.steps-nav a[aria-current='step'] .step-no { background: var(--fwd); border-color: var(--fwd); color: var(--on-fwd); }
.nav-status { font-size: 0.85rem; color: var(--muted); margin: 16px 0 0; min-height: 1.5em; }

main { min-width: 0; max-width: 900px; padding-bottom: 48px; }
main:focus { outline: none; }

.step > h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  line-height: 1.2;
  margin: 0 0 20px;
  letter-spacing: -0.01em;
  max-width: 24ch;
}
.step h3 { font-size: 1.2rem; margin: 40px 0 8px; line-height: 1.3; }
.step > p, .step > ul, .step > dl, #gen-main > p { max-width: 68ch; }

/* ---------------------------------------------------------- Werkbank-Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
}
.panel > :first-child { margin-top: 0; }
.panel-h { font-size: 1rem !important; margin: 20px 0 10px !important; }
.panel > .panel-h:first-child { margin-top: 0 !important; }
.panel-split { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.panel .panel-split { margin-top: 20px; grid-template-columns: 1fr 1fr; }

.hint { color: var(--muted); font-size: 0.92rem; margin: 10px 0; max-width: 68ch; }
.readout { min-height: 1.6em; margin: 12px 0; max-width: 68ch; }

.field-label { display: block; font-weight: 700; margin-bottom: 8px; }
.text-input {
  font: inherit; font-family: var(--font-mono);
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 12px; width: 100%; max-width: 22rem;
}
textarea.text-input { max-width: 100%; resize: vertical; }
.inline-field { display: inline-flex; align-items: center; gap: 8px; font-size: 0.92rem; color: var(--muted); }
select {
  font: inherit; font-size: 0.95rem; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 5px 8px;
}
input[type='range'] { accent-color: var(--fwd); width: 140px; }
output { font-family: var(--font-mono); color: var(--ink); min-width: 2.5em; }

/* ---------------------------------------------------------- Buttons */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px 10px; align-items: center; margin: 14px 0; }
.toolbar-quiet { margin-top: 20px; }
.btn {
  font: inherit; font-size: 0.95rem; font-weight: 700;
  color: var(--ink); background: var(--surface);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 7px 14px; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { border-color: var(--muted); color: var(--ink); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--fwd); border-color: var(--fwd); color: var(--on-fwd); }
.btn-primary:hover { background: var(--fwd-strong); border-color: var(--fwd-strong); color: var(--on-fwd); }
.btn-small { font-size: 0.85rem; padding: 4px 10px; font-weight: 400; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.seg { display: inline-flex; flex-wrap: wrap; gap: 6px; margin: 8px 16px 8px 0; }
.seg button {
  font-family: var(--font-mono); font-size: 1rem;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 6px; padding: 4px 12px; cursor: pointer;
}
.seg button[aria-checked='true'] { background: var(--fwd); border-color: var(--fwd); color: var(--on-fwd); }
.seg button:disabled { opacity: 0.4; cursor: default; }

/* ---------------------------------------------------------- Token-Kacheln */
.tiles { display: flex; flex-wrap: wrap; gap: 4px; margin: 14px 0; min-height: 3.2em; }
.tile {
  display: inline-flex; flex-direction: column; align-items: center;
  min-width: 2.1em; padding: 4px 6px 2px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 6px;
  font-family: var(--font-mono);
}
.tile-char { font-size: 1.25em; line-height: 1.2; }
.tile-id { font-size: 0.7em; color: var(--muted); }
.tile.is-active { border-color: var(--fwd); box-shadow: inset 0 0 0 1px var(--fwd); }
.tile.is-unknown { border-style: dashed; color: var(--muted); }
.tile.is-new { animation: tile-in 260ms ease-out; }
@keyframes tile-in { from { transform: translateY(-6px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------------------------------------------------------- Wahrscheinlichkeitsbalken */
.pbars { display: grid; gap: 3px; max-width: 34rem; }
.pbar { display: grid; grid-template-columns: 2.2em minmax(0, 1fr) 4.6em; gap: 10px; align-items: center; }
.pbar .tok { font-family: var(--font-mono); text-align: center; font-size: 1.05rem; }
.pbar-track { height: 14px; display: block; }
.pbar-fill { display: block; height: 100%; background: var(--ramp-2); border-radius: 0 4px 4px 0; transition: width 200ms ease-out; }
.pbar-val { font-family: var(--font-mono); font-size: 0.85rem; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.pbar.is-picked .pbar-fill { background: var(--fwd); }
.pbar.is-picked .tok { font-weight: 700; outline: 2px solid var(--fwd); border-radius: 4px; }
.pbar.is-picked .pbar-val { color: var(--ink); font-weight: 700; }

/* ---------------------------------------------------------- Charts */
.heatmap { width: 100%; max-width: 520px; display: block; touch-action: none; }
.chart { width: 100%; display: block; margin-top: 8px; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 10px 0; font-size: 0.88rem; color: var(--muted); }
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.swatch-fwd { background: var(--fwd); }
.swatch-grad { background: var(--grad); }
.swatch-line { width: 18px; height: 2px; border-radius: 1px; background: var(--fwd); }
.swatch-faint { opacity: 0.3; }
.swatch-dash { width: 18px; height: 0; border-top: 2px dashed var(--muted); border-radius: 0; }

.tooltip {
  position: fixed; left: 0; top: 0; z-index: 20;
  pointer-events: none; opacity: 0;
  background: var(--ink); color: var(--bg);
  padding: 7px 10px; border-radius: 6px;
  font-size: 0.85rem; line-height: 1.4;
  max-width: 280px;
  transition: opacity 80ms;
}
.tooltip.visible { opacity: 1; }
.tooltip strong { font-family: var(--font-mono); }
.tooltip-head { color: color-mix(in srgb, var(--bg) 75%, transparent); }
.tooltip-head strong { font-family: var(--font-sans); font-weight: 400; }

.stats { display: flex; flex-wrap: wrap; gap: 8px 36px; margin: 16px 0 4px; }
.stats div { display: flex; flex-direction: column-reverse; }
.stats dt { font-size: 0.82rem; color: var(--muted); }
.stats dd { margin: 0; font-family: var(--font-mono); font-size: 1.35rem; font-variant-numeric: tabular-nums; }

/* ---------------------------------------------------------- Tabellen */
.table-wrap { overflow-x: auto; margin: 12px 0; }
.data-table { border-collapse: collapse; font-size: 0.95rem; min-width: 100%; }
.data-table th, .data-table td { text-align: left; padding: 6px 14px 6px 0; border-bottom: 1px solid var(--grid); vertical-align: top; }
.data-table thead th { font-size: 0.82rem; color: var(--muted); font-weight: 400; border-bottom-color: var(--line); }
.data-table td { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.data-table tfoot th, .data-table tfoot td { border-bottom: 0; font-weight: 700; padding-top: 10px; }
.data-table tr.is-masked td { color: var(--muted); opacity: 0.55; }
.data-table .wbar { display: inline-block; height: 10px; background: var(--fwd); border-radius: 0 3px 3px 0; vertical-align: middle; margin-right: 8px; }
.compare td { font-family: var(--font-sans); }
.compare tbody th { font-weight: 700; }

/* ---------------------------------------------------------- Namenslisten */
.name-list { list-style: none; padding: 0; margin: 14px 0 0; display: flex; flex-wrap: wrap; gap: 6px 8px; }
.name-list li { font-family: var(--font-mono); padding: 2px 10px; background: var(--sunken); border-radius: 999px; }
.name-list li.is-novel { font-weight: 700; }
.name-list li.is-empty { color: var(--muted); font-style: italic; }

.sample-log { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; max-height: 260px; overflow-y: auto; }
.sample-log li { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 12px; font-size: 0.95rem; }
.sample-log .when { color: var(--muted); font-size: 0.85rem; padding-top: 2px; }
.sample-log .what { font-family: var(--font-mono); }
.sample-log .what b { font-weight: 700; }
.sample-log:empty::before { content: 'Alle 100 Schritte erscheinen hier neue Beispiele.'; color: var(--muted); font-size: 0.92rem; }

/* ---------------------------------------------------------- Rechengraph */
.sliders { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 6px 20px; margin: 8px 0 4px; }
.slider { display: grid; grid-template-columns: 2.4em minmax(0, 1fr) 3.4em; align-items: center; gap: 8px; font-family: var(--font-mono); }
.slider input { width: 100%; }
.graph-wrap { overflow-x: auto; margin: 8px -8px 0; padding: 0 8px; }
#ag-graph { display: block; width: 100%; min-width: 760px; height: auto; }
.g-edge { stroke: var(--line); stroke-width: 1.5; fill: none; }
.g-edge.is-active { stroke: var(--grad); stroke-width: 2.5; }
.g-node rect { fill: var(--surface); stroke: var(--line); stroke-width: 1.5; }
.g-node.is-leaf rect { fill: var(--sunken); }
.g-node.is-active rect { stroke: var(--grad); stroke-width: 2.5; }
.g-node.is-target rect { stroke: var(--grad); stroke-dasharray: 4 3; }
.g-name { font-family: var(--font-mono); font-weight: 700; font-size: 16px; fill: var(--ink); }
.g-op { font-family: var(--font-mono); font-size: 12px; fill: var(--muted); }
.g-data { font-family: var(--font-mono); font-size: 14px; fill: var(--fwd-strong); }
.g-grad { font-family: var(--font-mono); font-size: 14px; fill: var(--grad); font-weight: 700; }
.g-grad.is-zero { fill: var(--muted); font-weight: 400; }

/* ---------------------------------------------------------- Architektur */
.arch { display: grid; grid-template-columns: minmax(200px, 260px) minmax(0, 1fr); gap: 24px; margin: 20px 0; align-items: start; }
.arch-stack { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column-reverse; gap: 0; }
.arch-stack li { display: flex; flex-direction: column; align-items: stretch; }
.arch-stack li:not(:first-child)::after { content: ''; display: block; width: 2px; height: 14px; background: var(--line); margin: 0 auto; }
.arch-stack button, .arch-helpers button {
  font: inherit; font-size: 0.95rem; text-align: left;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 12px; cursor: pointer;
}
.arch-stack button small { display: block; color: var(--muted); font-size: 0.8rem; }
.arch-helpers { display: flex; flex-wrap: wrap; gap: 6px; }
.arch-helpers button { font-size: 0.88rem; padding: 5px 10px; }
.arch-helpers-title { font-size: 0.85rem; font-weight: 700; margin: 16px 0 8px; }
.arch button[aria-pressed='true'] { border-color: var(--fwd); box-shadow: inset 0 0 0 1px var(--fwd); background: var(--fwd-soft); }
.arch-stack .arch-block { border-left: 3px solid var(--fwd); }
.arch-detail > :first-child { margin-top: 0; }
.arch-detail h4 { font-size: 1.05rem; margin: 0 0 6px; }

/* ---------------------------------------------------------- Attention-Gitter */
.att-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px; }
.att-grid figure { margin: 0; }
.att-grid figcaption { font-size: 0.85rem; color: var(--muted); margin-bottom: 4px; }
.att-grid:empty::before { content: 'Gib oben einen Anfang ein oder zieh ein Zeichen.'; color: var(--muted); font-size: 0.92rem; }

.gen-controls { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: end; }
.gen-controls > :first-child { flex: 0 0 100%; margin-bottom: -4px; }
.gen-controls .text-input { flex: 1 1 14rem; }

.notice { border: 1px solid var(--fwd); background: var(--fwd-soft); border-radius: 12px; padding: 16px 20px; margin: 0 0 24px; }
.notice > p:first-child { margin-top: 0; }

.config { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px 22px; }

/* ---------------------------------------------------------- Code */
.code { margin: 16px 0 24px; }
.code pre {
  margin: 0; padding: 16px 18px;
  background: var(--sunken); border-radius: var(--radius);
  overflow-x: auto; font-size: 0.85rem; line-height: 1.55;
  tab-size: 2;
}
.code pre code { background: none; padding: 0; font-size: inherit; }
.code-cap { font-size: 0.8rem; color: var(--muted); margin-top: 6px; }
.c-com { color: var(--muted); font-style: italic; }
.c-kw { color: var(--fwd-strong); font-weight: 700; }
.c-str { color: var(--grad); }
.c-num { color: var(--grad); }
.code:empty { min-height: 4em; background: var(--sunken); border-radius: var(--radius); }

.glossary dt { font-weight: 700; margin-top: 14px; }
.glossary dd { margin: 2px 0 0; }
.links { padding-left: 1.2em; }
.links li { margin: 6px 0; }

/* ---------------------------------------------------------- Teil 2 */
.nav-part { font-size: 0.78rem; font-weight: 700; color: var(--muted); margin: 18px 0 6px; }
.nav-part:first-child { margin-top: 0; }
.part-intro { border-left: 4px solid var(--fwd); background: var(--fwd-soft); padding: 14px 18px; border-radius: 0 10px 10px 0; margin: 0 0 20px; max-width: 72ch; }
.part-intro p { margin: 0; }

.choice-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; margin: 8px 0 16px; }
.choice {
  font: inherit; text-align: left; cursor: pointer;
  display: flex; flex-direction: column; gap: 4px;
  background: var(--surface); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
}
.choice strong { font-size: 1rem; }
.choice span { font-size: 0.86rem; color: var(--muted); line-height: 1.4; }
.choice:hover { border-color: var(--muted); }
.choice[aria-checked='true'] { border-color: var(--fwd); box-shadow: inset 0 0 0 1px var(--fwd); background: var(--fwd-soft); }
.choice:disabled { opacity: 0.45; cursor: not-allowed; }
#ds-upload { margin: 4px 0 12px; }

.merge-list { list-style: none; counter-reset: merge; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.merge-list li { counter-increment: merge; font-family: var(--font-mono); font-size: 0.9rem; background: var(--sunken); border-radius: 6px; padding: 3px 8px 3px 6px; }
.merge-list li::before { content: counter(merge); color: var(--muted); font-size: 0.72rem; margin-right: 6px; }
.merge-list li span { background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; }

.text-input-wide { max-width: 100%; }
.tok-strip { display: flex; flex-wrap: wrap; gap: 3px; margin: 12px 0; }
.tok-strip .tile { min-width: 0; padding: 3px 6px 1px; }
.tok-strip .tile:nth-child(odd) { background: var(--fwd-soft); }
.tok-strip .tile-char { font-size: 1.05em; white-space: pre; }

.rope-demo { display: grid; grid-template-columns: minmax(180px, 240px) minmax(0, 1fr); gap: 24px; align-items: center; }
#rope-svg { width: 100%; height: auto; }
.rope-circle { fill: none; stroke: var(--line); stroke-width: 1.5; }
.rope-axis { stroke: var(--grid); stroke-width: 1; }
.rope-q { stroke: var(--fwd); stroke-width: 4; }
.rope-k { stroke: var(--ink); stroke-width: 4; }
.rope-head-q { fill: var(--fwd); }
.rope-head-k { fill: var(--ink); }
.rope-label { font-family: var(--font-mono); font-size: 16px; font-weight: 700; fill: var(--ink); text-anchor: middle; dominant-baseline: middle; }
.rope-demo .slider { grid-template-columns: 1.5em minmax(0, 1fr) 2.5em; }
.rope-demo .hint { margin: 0 0 12px; }

.swatch-val { width: 18px; height: 0; border-top: 2px dashed var(--ink); border-radius: 0; background: none; }
.sample-log-wide li { grid-template-columns: 7em minmax(0, 1fr); }
.sample-log-wide .what { font-family: var(--font-sans); white-space: pre-wrap; }
.sample-log-wide .what b { font-weight: 700; }
#tr-samples:empty::before { content: 'Während des Trainings erscheinen hier regelmäßig Texte, die das Modell selbst schreibt.'; }

#ex-main .sliders { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
#ex-main .slider { grid-template-columns: 3.4em minmax(0, 1fr) 5.6em; }
.gen-output { min-height: 5em; margin: 8px 0; padding: 14px 16px; background: var(--sunken); border-radius: 8px; white-space: pre-wrap; max-width: 72ch; }
.gen-output:empty::before { content: 'Hier erscheint der Text deines Modells.'; color: var(--muted); }
.gen-prompt { font-weight: 700; }

.meta-details { margin-top: 12px; }
.meta-details summary { cursor: pointer; font-weight: 700; }
.meta-details th { font-family: var(--font-mono); font-weight: 400; font-size: 0.85rem; }

.howto { padding-left: 1.3em; max-width: 72ch; }
.howto > li { margin: 10px 0 16px; }
.cmd { position: relative; margin: 10px 0; }
.cmd pre { margin: 0; padding: 14px 16px; padding-right: 7.5em; background: var(--sunken); border-radius: 8px; overflow-x: auto; font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.6; }
.cmd pre code { background: none; padding: 0; }
.cmd-copy { position: absolute; top: 8px; right: 8px; }
.os-tabs { margin: 10px 0 0; }
.ref-output { font-family: var(--font-mono); font-size: 0.92rem; background: var(--sunken); padding: 2px 6px; border-radius: 4px; white-space: pre-wrap; }

/* ---------------------------------------------------------- Blättern */
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); }
.pager-link { display: flex; flex-direction: column; text-decoration: none; padding: 8px 0; max-width: 48%; }
.pager-link small { color: var(--muted); font-size: 0.82rem; }
.pager-link span { font-weight: 700; font-size: 1.05rem; }
.pager-next { text-align: right; margin-left: auto; }
.pager-link[hidden] { display: none; }

.site-footer { max-width: 1240px; margin: 0 auto; padding: 24px 32px 48px; color: var(--muted); font-size: 0.85rem; }
.site-footer p { max-width: 80ch; margin: 0; }

/* ---------------------------------------------------------- Mobil */
@media (max-width: 900px) {
  .masthead { padding: 24px 16px 16px; }
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; padding: 0 16px; }
  .steps-nav {
    position: sticky; top: 0; z-index: 5;
    background: var(--bg); margin: 0 -16px 20px; padding: 8px 16px;
    border-bottom: 1px solid var(--line);
  }
  .steps-nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
  .steps-nav ol { display: flex; gap: 4px; flex: none; }
  .nav-part { display: none; }
  .rope-demo { grid-template-columns: minmax(0, 1fr); }
  .steps-nav a { margin: 0; white-space: nowrap; padding: 6px 8px; }
  .steps-nav a:not([aria-current='step']) span:last-child { display: none; }
  .nav-status { display: none; }
  .panel { padding: 16px; margin-left: -4px; margin-right: -4px; }
  .panel-split, .panel .panel-split, .arch { grid-template-columns: minmax(0, 1fr); }
  .site-footer { padding: 24px 16px 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}