/* ---- tokens.css ---- */
/* nowplus10 · Design-Tokens (siehe docs/design-proposal.md) */
:root {
  color-scheme: light dark;
  /* Farben hell (Standard) */
  --bg: #F7F5F0;
  --surface: #FFFFFF;
  --ink: #14181D;
  --ink-2: #4B5563;
  --ink-dim: #5F6873;
  --line: #D8D3C8;
  --signal: #0E6E7E;
  --signal-strong: #0B5A68;
  --signal-soft: rgba(14, 110, 126, 0.14);
  /* Hero: in beiden Schemata dunkel */
  --hero-bg: #0B0F13;
  --hero-ink: #E8E6E1;
  --hero-dim: #B4BAC2;
  --hero-signal: #4FC1CF;
  --hero-shade: linear-gradient(180deg, rgba(11,15,19,.50) 0%, rgba(11,15,19,.30) 40%, rgba(11,15,19,.94) 100%);
  --hero-shade-x: linear-gradient(90deg, rgba(11,15,19,.62) 0%, rgba(11,15,19,.40) 45%, rgba(11,15,19,0) 80%);
  /* Typografie */
  --font-sans: "Inter", -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --fs-display: clamp(2.5rem, 6vw, 4.25rem);
  --fs-h2: clamp(1.625rem, 3vw, 2.25rem);
  --fs-h3: 1.25rem;
  --fs-lead: clamp(1.25rem, 2vw, 1.5rem);
  --fs-narrative: 1.125rem;
  --fs-body: 1.0625rem;
  --fs-small: .9375rem;
  --fs-label: .6875rem;
  --fs-stamp: .8125rem;
  /* Abstände */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px;
  --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px;
  --section: clamp(4rem, 10vh, 7.5rem);
  --gutter: clamp(1.25rem, 5vw, 3rem);
  --wrap: 72rem;
  --measure: 65ch;
  --rail: 8.5rem;
  /* Radien */
  --r-control: 2px;
  --r-panel: 4px;
  /* Bewegung */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --dur: .6s;
  --header-h: 4rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0F13;
    --surface: #12181F;
    --ink: #E8E6E1;
    --ink-2: #B4BAC2;
    --ink-dim: #8B949E;
    --line: #2E3947;
    --signal: #4FC1CF;
    --signal-strong: #7DD3DE;
    --signal-soft: rgba(79, 193, 207, 0.16);
  }
}
@media (prefers-reduced-motion: reduce) {
  :root { --dur: 0s; }
}

/* ---- base.css ---- */
/* Schriften: selbst gehostet, nur Latin, Variable Fonts */
@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-var-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Source Serif 4";
  src: url("../fonts/source-serif-4-latin.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -.015em; line-height: 1.15; text-wrap: balance; }
p { margin: 0; }
p + p { margin-top: 1em; }
a { color: var(--signal); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--signal-strong); }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; }
time { font-variant-numeric: tabular-nums; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: var(--r-control); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: var(--s-4); top: -100%; z-index: 100; padding: var(--s-2) var(--s-4); background: var(--surface); color: var(--ink); border: 1px solid var(--ink-dim); border-radius: var(--r-control); }
.skip:focus { top: var(--s-4); }
.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
.wrap--text { max-width: var(--measure); }
.label { font-family: var(--font-sans); font-size: var(--fs-label); font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); }

/* ---- components.css ---- */
/* Komponenten: Kopf, Hero, Kapitel mit Randspalte, Diagramme, Fuß. Ausgestaltung folgt in Phase 3. */

/* ---- Kopf ---- */
.site-header { position: absolute; top: 0; left: 0; right: 0; z-index: 10; color: var(--hero-ink); }
.is-legal .site-header { position: static; color: var(--ink); border-bottom: 1px solid var(--line); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s-5); min-height: var(--header-h); }
.wordmark { font-weight: 600; letter-spacing: .01em; color: inherit; text-decoration: none; white-space: nowrap; }
.wordmark .tld { color: var(--hero-dim); font-weight: 400; }
.is-legal .wordmark .tld { color: var(--ink-dim); }
.site-nav { display: flex; align-items: center; gap: var(--s-5); }
.site-nav__list { display: flex; gap: var(--s-5); }
.site-nav a { color: inherit; text-decoration: none; font-size: var(--fs-small); }
.site-nav a:hover { text-decoration: underline; }
.lang { display: inline-flex; align-items: center; gap: var(--s-2); padding-left: var(--s-4); border-left: 1px solid currentColor; font-size: var(--fs-stamp); letter-spacing: .08em; }
.lang a { opacity: .6; }
.lang a[aria-current] { opacity: 1; font-weight: 500; }
@media (max-width: 40rem) { .site-nav__list { display: none; } }

/* ---- Hero ---- */
.hero { position: relative; min-height: 100svh; display: grid; grid-template-rows: 1fr auto; background: var(--hero-bg); color: var(--hero-ink); overflow: hidden; isolation: isolate; }
.hero__media { position: absolute; inset: 0; z-index: -1; }
.hero__media picture, .hero__poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__video-slot video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 1.2s var(--ease); }
.hero__video-slot video.is-playing { opacity: 1; }
.hero__shade { position: absolute; inset: 0; background: var(--hero-shade-x), var(--hero-shade); }
.hero__lines { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--hero-signal); opacity: .7; }
.hero__line { stroke-dasharray: 2400; stroke-dashoffset: 2400; animation: draw 6s var(--ease) forwards; }
.hero__line--2 { animation-delay: .8s; opacity: .6; }
.hero__line--3 { animation-delay: 1.6s; opacity: .4; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) { .hero__line { animation: none; stroke-dashoffset: 0; } }
.hero__inner { position: relative; display: grid; grid-template-columns: 1fr; gap: var(--s-6); align-content: end; padding-top: calc(var(--header-h) + var(--s-8)); padding-bottom: var(--s-7); }
.hero__text { max-width: 36rem; }
.stamp { font-size: var(--fs-stamp); letter-spacing: .06em; color: var(--hero-dim); }
.stamp .label { color: inherit; }
.hero__title { font-size: var(--fs-display); font-weight: 400; letter-spacing: -.02em; line-height: 1.05; margin-top: var(--s-4); }
.hero__subtitle { font-family: var(--font-serif); font-size: var(--fs-lead); line-height: 1.35; margin-top: var(--s-3); color: var(--hero-ink); }
.hero__lead { margin-top: var(--s-5); max-width: 32rem; color: var(--hero-ink); opacity: .88; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }
.hero__cross { display: none; color: var(--hero-signal); opacity: .9; }
.hero__status { font-size: var(--fs-stamp); color: var(--hero-dim); letter-spacing: .06em; }
.status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--hero-signal); margin-right: var(--s-2); vertical-align: middle; }
.hero__pause { position: absolute; right: 0; top: calc(var(--header-h) + var(--s-4)); }
@media (min-width: 60rem) {
  .hero__inner { grid-template-columns: 1fr minmax(16rem, 22rem); align-items: end; }
  .hero__cross { display: block; justify-self: end; width: min(22rem, 100%); }
  .hero__status { grid-column: 1 / -1; }
}

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; gap: var(--s-2); min-height: 44px; padding: .7rem 1.4rem; font-size: var(--fs-small); font-weight: 500; text-decoration: none; border-radius: var(--r-control); border: 1px solid currentColor; color: inherit; background: transparent; transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease); }
.hero .btn { background: var(--hero-ink); color: var(--hero-bg); border-color: var(--hero-ink); }
.hero .btn--ghost { background: transparent; color: var(--hero-ink); }
.hero .btn:hover { background: var(--hero-signal); border-color: var(--hero-signal); color: var(--hero-bg); }

/* ---- Kapitel mit Randspalte (Layout B) ---- */
.chapter { padding: var(--section) 0; border-top: 1px solid var(--line); }
.chapter--thesis { border-top: 0; }
.chapter__grid { display: grid; grid-template-columns: 1fr; gap: var(--s-5); }
.rail { display: flex; align-items: baseline; gap: var(--s-3); }
.rail__num { font-size: var(--fs-stamp); font-weight: 500; letter-spacing: .06em; color: var(--signal); }
.rail__label { font-size: var(--fs-label); font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); }
.chapter__body { max-width: var(--measure); }
.chapter__title { font-size: var(--fs-h2); margin-bottom: var(--s-5); }
.chapter__subtitle { font-size: var(--fs-h3); margin-top: var(--s-7); margin-bottom: var(--s-4); }
.chapter__intro, .chapter__closing, .chapter__note { color: var(--ink-2); }
.chapter__closing { margin-top: var(--s-5); font-family: var(--font-serif); font-size: var(--fs-narrative); color: var(--ink); }
.thesis { font-family: var(--font-serif); font-size: var(--fs-lead); line-height: 1.45; max-width: 30ch; }
.narrative { font-family: var(--font-serif); font-size: var(--fs-narrative); line-height: 1.6; }
.narrative + .narrative { margin-top: 1em; }
@media (min-width: 48rem) {
  .chapter__grid { grid-template-columns: var(--rail) minmax(0, 1fr); gap: var(--s-7); }
  .rail { position: sticky; top: var(--s-6); align-self: start; flex-direction: column; gap: var(--s-1); }
}

/* ---- Schritte ---- */
.steps { display: grid; gap: var(--s-5); margin-top: var(--s-6); }
.steps__item { display: grid; grid-template-columns: 2rem 1fr; gap: 0 var(--s-3); }
.steps__num { font-size: var(--fs-stamp); color: var(--signal); font-weight: 500; }
.steps__title { font-size: var(--fs-h3); }
.steps__text { grid-column: 2; margin-top: var(--s-2); color: var(--ink-2); }
@media (min-width: 48rem) { .steps { grid-template-columns: repeat(3, 1fr); } .steps__item { grid-template-columns: 1fr; } .steps__text { grid-column: 1; } }

/* ---- Diagramme ---- */
.diagram { margin: var(--s-6) 0 0; }
.diagram__svg { width: 100%; height: auto; font-family: var(--font-sans); }
.diagram figcaption { margin-top: var(--s-3); font-size: var(--fs-small); color: var(--ink-dim); }
.diagram__box rect { fill: var(--surface); stroke: var(--ink-dim); }
.diagram__box line { stroke: var(--line); }
.diagram__name { fill: var(--ink); font-size: 18px; font-weight: 500; }
.diagram__sub { fill: var(--ink-dim); font-size: 13px; }
.diagram__id { fill: var(--signal); font-size: 14px; letter-spacing: .16em; }
.diagram__arrow line, .diagram__arrow polyline { stroke: var(--signal); fill: none; stroke-width: 1.25; }
.diagram__axis line { stroke: var(--ink-dim); }
.diagram__ticks text { fill: var(--ink-dim); font-size: 13px; }
.diagram__band { fill: var(--signal-soft); }
.diagram__band-edge { fill: none; stroke: var(--signal); stroke-width: 1; }
.diagram__line { fill: none; stroke: var(--ink-dim); stroke-width: 1.5; stroke-dasharray: 4 4; }
.diagram__legend { fill: var(--ink-dim); font-size: 14px; }
.diagram__legend--band { fill: var(--signal); }

/* ---- Szenariokreuz ---- */
.cross { position: relative; margin-top: var(--s-6); }
.cross__axis { display: flex; justify-content: space-between; gap: var(--s-3); font-size: var(--fs-small); color: var(--ink-2); }
.cross__axis .label { flex-basis: 100%; }
.cross__axis--x { flex-wrap: wrap; margin-bottom: var(--s-3); }
.cross__axis--y { flex-wrap: wrap; margin-top: var(--s-3); }
.cross__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.cross__cell { background: var(--surface); padding: var(--s-4); display: grid; gap: var(--s-1); }
.cross__id { font-size: var(--fs-stamp); letter-spacing: .16em; color: var(--signal); font-weight: 500; }
.cross__name { font-weight: 500; }
.cross__text { font-size: var(--fs-small); color: var(--ink-2); }
.terms { display: grid; gap: var(--s-3); margin: 0; }
.terms__row { display: grid; grid-template-columns: 1fr; gap: var(--s-1); }
.terms dt { font-weight: 500; }
.terms dd { margin: 0; color: var(--ink-2); }
@media (min-width: 40rem) { .terms__row { grid-template-columns: 9rem 1fr; gap: var(--s-4); } }

/* ---- Listen, Zeitleiste, Stufen ---- */
.plain-list { display: grid; gap: var(--s-3); color: var(--ink-2); }
.plain-list strong { color: var(--ink); font-weight: 500; }
.timeline { display: grid; gap: var(--s-5); position: relative; padding-left: var(--s-5); border-left: 1px solid var(--signal); }
.timeline__item { position: relative; display: grid; gap: var(--s-1); }
.timeline__marker { position: absolute; left: calc(-1 * var(--s-5) - 4px); top: .45em; width: 7px; height: 7px; border-radius: 50%; background: var(--signal); }
.timeline__cadence { color: var(--signal); }
.timeline__title { font-weight: 500; }
.timeline__text { color: var(--ink-2); font-size: var(--fs-small); }
.tiers { display: grid; gap: var(--s-4); }
.tiers__item { display: grid; gap: var(--s-1); padding: var(--s-4); border: 1px solid var(--line); border-radius: var(--r-panel); background: var(--surface); }
.tiers__name { font-weight: 500; }
.tiers__text { color: var(--ink-2); font-size: var(--fs-small); }
@media (min-width: 48rem) { .tiers { grid-template-columns: repeat(3, 1fr); } }
.tag { display: inline-block; vertical-align: middle; margin-left: var(--s-2); padding: 2px 8px; font-size: var(--fs-label); letter-spacing: .12em; text-transform: uppercase; color: var(--signal); border: 1px solid var(--signal); border-radius: var(--r-control); }
.handover { margin-top: var(--s-5); padding-top: var(--s-4); border-top: 1px solid var(--line); color: var(--ink-2); }

/* ---- Rechtstexte ---- */
.legal { padding: var(--s-8) 0 var(--section); }
.legal h1 { font-size: var(--fs-h2); margin: var(--s-2) 0 var(--s-6); }
.legal h2 { font-size: var(--fs-h3); margin: var(--s-6) 0 var(--s-3); }
.legal__updated { margin-top: var(--s-7); font-size: var(--fs-small); color: var(--ink-dim); }

/* ---- Fuß ---- */
.site-footer { border-top: 1px solid var(--line); padding: var(--s-7) 0 var(--s-5); font-size: var(--fs-small); color: var(--ink-2); }
.site-footer__inner { display: grid; gap: var(--s-6); }
.site-footer__stamp { color: var(--ink); }
.site-footer__note { margin-top: var(--s-2); }
.site-footer__publisher { margin-top: var(--s-2); }
.site-footer__links { display: grid; gap: var(--s-1); margin-top: var(--s-2); }
.site-footer__links a { color: inherit; }
.site-footer__bottom { margin-top: var(--s-6); padding-top: var(--s-4); border-top: 1px solid var(--line); color: var(--ink-dim); }
@media (min-width: 48rem) { .site-footer__inner { grid-template-columns: 2fr 1fr 1fr; } }

/* ---- Ausklappbare Rechtstexte (Startseite) ---- */
.legal-inline { padding: 0 0 var(--section); display: grid; gap: var(--s-3); }
.fold { border: 1px solid var(--line); border-radius: var(--r-panel); background: var(--surface); }
.fold__summary { display: flex; align-items: center; gap: var(--s-3); padding: var(--s-4) var(--s-5); cursor: pointer; list-style: none; font-size: var(--fs-label); font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-dim); user-select: none; }
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary:hover { color: var(--ink); }
.fold__marker { width: 8px; height: 8px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(-45deg); transition: transform .2s var(--ease); }
.fold[open] .fold__marker { transform: rotate(45deg); }
.fold__body { padding: var(--s-2) var(--s-5) var(--s-5); border-top: 1px solid var(--line); font-size: var(--fs-small); color: var(--ink-2); max-width: none; }
.fold__body h3 { font-size: var(--fs-body); color: var(--ink); margin: var(--s-5) 0 var(--s-2); }
.fold__body p { max-width: var(--measure); }
.fold__updated { margin-top: var(--s-5); color: var(--ink-dim); }

/* ---- Statistik (intern) ---- */
.stat-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-4); margin: var(--s-5) 0 var(--s-6); }
.stat { display: grid; gap: var(--s-1); padding: var(--s-4); border: 1px solid var(--line); border-radius: var(--r-panel); background: var(--surface); }
.stat__value { font-size: var(--fs-h2); font-weight: 500; letter-spacing: -.015em; }
.bars { display: grid; gap: var(--s-2); margin-bottom: var(--s-6); }
.bars li { display: grid; grid-template-columns: 8rem 1fr 3rem; align-items: center; gap: var(--s-3); font-size: var(--fs-small); }
.bars__label { color: var(--ink-dim); font-variant-numeric: tabular-nums; }
.bars__bar { display: block; height: 10px; background: var(--signal-soft); border-radius: 1px; overflow: hidden; }
.bars__bar span { display: block; height: 100%; background: var(--signal); }
.bars__value { text-align: right; font-variant-numeric: tabular-nums; }
@media (min-width: 40rem) { .stat-row { grid-template-columns: repeat(4, 1fr); } }