/* ==========================================================================
   LAB · Designsystem  (Lernakademie Basel)
   --------------------------------------------------------------------------
   Typografisches System
   - Montserrat   → Navigation, Buttons, Labels, Fliesstext, funktionale UI
   - Abhaya Libre → grosse Titel, Headlines, redaktionelle Aussagen, Zahlen
   Farben: sehr dunkles Navy (Basis) · LAB-Blau (Akzent) · Sand (editorialer
   Gegenpol, aus dem Logo) · bläuliches Weiss für Typografie.
   Mobile-first: Basis = Mobile, Erweiterungen via min-width.
   ========================================================================== */

/* ---------- Fonts (selbst gehostet, nur Latin) ---------- */
@font-face { font-family: "Montserrat"; src: url("../fonts/montserrat-var.woff2") format("woff2"); font-weight: 100 900; font-style: normal; font-display: swap; }
@font-face { font-family: "Abhaya Libre"; src: url("../fonts/abhaya-libre-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Abhaya Libre"; src: url("../fonts/abhaya-libre-600.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Abhaya Libre"; src: url("../fonts/abhaya-libre-700.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Abhaya Libre"; src: url("../fonts/abhaya-libre-800.woff2") format("woff2"); font-weight: 800; font-style: normal; font-display: swap; }

/* ---------- Design Tokens ---------- */
:root {
  /* Farben */
  --bg: #050814;
  --bg-2: #080d1f;
  --bg-3: #0c1432;
  --surface: #0b1229;
  --surface-2: #111b3d;
  --line: rgba(150, 170, 255, .13);
  --line-strong: rgba(160, 178, 255, .30);
  --text: #eef1fb;
  --text-2: #b6bfda;
  --text-3: #8d98ba;
  --blue: #1e2be8;          /* LAB-Blau (Logo) */
  --blue-500: #3a4cff;
  --blue-400: #6c7dff;
  --blue-300: #a0acff;
  --sand: #cdbfb3;          /* Beige aus dem Logo */
  --sand-2: #e8dfd6;
  --ink: #0a1022;           /* Text auf hellen Flächen */

  /* Typografie */
  --font-ui: "Montserrat", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Abhaya Libre", Georgia, "Times New Roman", serif;

  /* Radien */
  --r-xs: 10px;
  --r-sm: 16px;
  --r-md: 24px;
  --r-lg: 32px;
  --r-xl: 44px;
  --r-pill: 999px;

  /* Spacing-System (4er-Raster) */
  --s-1: .25rem;
  --s-2: .5rem;
  --s-3: .75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;
  --s-10: 9rem;
  --section-y: clamp(4.5rem, 9vw, 8rem);
  --gutter: clamp(1.25rem, 5vw, 3.5rem);

  /* Bewegung (Animation Principles: kurz, weich, nur transform/opacity) */
  --ease: cubic-bezier(.22, .8, .24, 1);
  --ease-soft: cubic-bezier(.3, .6, .3, 1);
  --t-fast: .25s;
  --t-med: .5s;
  --t-slow: .9s;

  --header-h: 4.25rem;
}

@media (min-width: 1024px) { :root { --header-h: 5rem; } }

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text-2);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2, h3, h4 { color: var(--text); font-weight: 600; }
::selection { background: var(--blue-500); color: #fff; }

:focus-visible {
  outline: 2px solid var(--blue-300);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 200;
  padding: .75rem 1.25rem; border-radius: var(--r-pill);
  background: var(--text); color: var(--ink); font-weight: 600; font-size: .875rem;
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---------- Layout ---------- */
.container { width: min(100% - (var(--gutter) * 2), 75rem); margin-inline: auto; }
.container--wide { width: min(100% - (var(--gutter) * 2), 90rem); margin-inline: auto; }
.container--narrow { width: min(100% - (var(--gutter) * 2), 52rem); margin-inline: auto; }

.section { position: relative; padding-block: var(--section-y); }
.section--tight { padding-block: calc(var(--section-y) * .6); }
.section--clip { overflow-x: clip; }
.band {
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border-block: 1px solid var(--line);
}

/* ---------- Typografie ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: .98;
  letter-spacing: -.012em;
  color: var(--text);
  text-wrap: balance;
}
.display--xl { font-size: clamp(3.4rem, 11.5vw, 10rem); line-height: .92; letter-spacing: -.02em; }
.display--l  { font-size: clamp(2.7rem, 7.6vw, 6.4rem); }
.display--m  { font-size: clamp(2.1rem, 5vw, 3.9rem); }
.display--s  { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.08; }
.display em, .em-sand { font-style: normal; color: var(--sand); }
.em-blue { font-style: normal; color: var(--blue-300); }

.eyebrow {
  display: inline-flex; align-items: center; gap: .75rem;
  font-family: var(--font-ui); font-size: .75rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase; color: var(--sand);
}
.eyebrow::before { content: ""; width: 1.75rem; height: 1px; background: currentColor; opacity: .7; }
.eyebrow--plain::before { display: none; }

.lead { font-size: clamp(1.05rem, 1.4vw + .6rem, 1.3rem); line-height: 1.65; color: var(--text-2); max-width: 38rem; text-wrap: pretty; }
.prose p + p { margin-top: 1.1em; }
.prose { max-width: 38rem; text-wrap: pretty; }
.muted { color: var(--text-3); }
.small { font-size: .875rem; line-height: 1.6; }
.label { font-size: .72rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--text-3); }

/* Platzhalter für fehlende Inhalte (bewusst sichtbar, siehe README) */
.todo {
  display: inline-block; padding: .05em .55em; border-radius: 6px;
  border: 1px dashed rgba(205, 191, 179, .55); background: rgba(205, 191, 179, .08);
  color: var(--sand-2); font-size: .85em; font-weight: 500; line-height: 1.5;
}
a.todo { text-decoration: none; }

/* ---------- Buttons ---------- */
.btn {
  --btn-bg: transparent; --btn-fg: var(--text); --btn-bd: var(--line-strong);
  position: relative; isolation: isolate;
  display: inline-flex; align-items: center; justify-content: center; gap: .65rem;
  min-height: 3.25rem; padding: .85rem 1.65rem;
  border-radius: var(--r-pill); border: 1px solid var(--btn-bd);
  background: var(--btn-bg); color: var(--btn-fg);
  font-family: var(--font-ui); font-size: .9375rem; font-weight: 600; letter-spacing: .01em; line-height: 1.2;
  white-space: normal; text-align: center;
  transition: transform var(--t-med) var(--ease), border-color var(--t-fast), background-color var(--t-fast), box-shadow var(--t-med) var(--ease), color var(--t-fast);
}
.btn .arr { width: 1.15em; height: 1.15em; flex: none; transition: transform var(--t-med) var(--ease); }
.btn:hover .arr, .btn:focus-visible .arr { transform: translateX(4px); }
.btn:active { transform: scale(.975); transition-duration: .1s; }

.btn--primary {
  --btn-bd: rgba(160, 172, 255, .35); --btn-fg: #fff;
  background: linear-gradient(180deg, #3d4fff 0%, var(--blue) 100%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .22) inset, 0 12px 30px -14px rgba(58, 76, 255, .75);
}
.btn--primary:hover { transform: translateY(-2px); border-color: rgba(190, 198, 255, .6); box-shadow: 0 1px 0 rgba(255, 255, 255, .28) inset, 0 18px 40px -14px rgba(76, 94, 255, .9); }
.btn--primary:active { transform: translateY(0) scale(.975); }

.btn--ghost:hover { transform: translateY(-2px); background: rgba(255, 255, 255, .05); border-color: rgba(190, 200, 255, .55); }
.btn--ghost:active { transform: translateY(0) scale(.975); }

.btn--sand { --btn-bg: var(--sand); --btn-fg: var(--ink); --btn-bd: transparent; }
.btn--sand:hover { transform: translateY(-2px); background: var(--sand-2); box-shadow: 0 16px 36px -16px rgba(205, 191, 179, .6); }
.btn--sand:active { transform: translateY(0) scale(.975); }

.btn--lg { min-height: 3.75rem; padding: 1rem 2.1rem; font-size: 1rem; }
.btn--sm { min-height: 2.5rem; padding: .5rem 1.15rem; font-size: .8125rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: .85rem; align-items: center; }
@media (max-width: 479px) { .btn-row .btn { width: 100%; } }

.link-arrow {
  display: inline-flex; align-items: center; gap: .55rem;
  font-size: .9375rem; font-weight: 600; color: var(--text);
  padding-block: .35rem; position: relative;
}
.link-arrow::after {
  content: ""; position: absolute; left: 0; right: 1.7rem; bottom: 0; height: 1px;
  background: currentColor; opacity: .35; transform-origin: left; transition: transform var(--t-med) var(--ease), opacity var(--t-fast);
}
.link-arrow .arr { width: 1.1em; height: 1.1em; transition: transform var(--t-med) var(--ease); color: var(--blue-300); }
.link-arrow:hover::after { opacity: 1; }
.link-arrow:hover .arr { transform: translateX(5px); }

/* ---------- Karten / Flächen ---------- */
.card {
  position: relative; isolation: isolate; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, .04), rgba(255, 255, 255, .012));
  padding: clamp(1.5rem, 3vw, 2.5rem);
  transition: transform var(--t-med) var(--ease), border-color var(--t-med) var(--ease), background-color var(--t-med);
}
.card::before { /* weicher Lichtfleck, folgt dem Cursor (nur bei Hover-Geräten) */
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; pointer-events: none;
  background: radial-gradient(28rem circle at var(--mx, 50%) var(--my, 0%), rgba(90, 108, 255, .16), transparent 60%);
  transition: opacity var(--t-med) var(--ease);
}
@media (hover: hover) {
  .card:hover { transform: translateY(-4px); border-color: var(--line-strong); }
  .card:hover::before { opacity: 1; }
}

.chip {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .45rem .95rem; border-radius: var(--r-pill);
  border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .03);
  font-size: .8125rem; font-weight: 600; color: var(--text); letter-spacing: .01em;
  transition: border-color var(--t-fast), background-color var(--t-fast), transform var(--t-med) var(--ease);
}
.chip::before { content: ""; width: .4rem; height: .4rem; border-radius: 50%; background: var(--blue-400); }
a.chip:hover, .chip:hover { border-color: rgba(190, 200, 255, .6); background: rgba(255, 255, 255, .07); transform: translateY(-1px); }

/* ---------- Illustrationen (Linienzeichnungen → invertiert für Dark) ---------- */
.illu { position: relative; overflow: hidden; border-radius: var(--r-xl); border: 1px solid var(--line); background: #070b1d; }
.illu img {
  width: 100%; height: 100%; object-fit: cover;
  filter: invert(1) contrast(1.08) brightness(.92);
  mix-blend-mode: screen; opacity: .9;
}
.illu::after { /* feines Blau-Grading + Randverlauf */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(180deg, rgba(30, 43, 232, .16), rgba(5, 8, 20, 0) 40%),
    linear-gradient(0deg, rgba(5, 8, 20, .75), rgba(5, 8, 20, 0) 38%);
}

/* ---------- Header ---------- */
.site-header { position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h); }
.site-header::before { /* Hintergrund als Pseudo-Element (backdrop-filter bricht sonst fixed-Kinder) */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(5, 8, 20, 0); border-bottom: 1px solid transparent;
  transition: background-color var(--t-med) var(--ease), border-color var(--t-med), backdrop-filter var(--t-med);
}
.site-header.is-scrolled::before, body.nav-open .site-header::before {
  background: rgba(5, 8, 20, .82); border-bottom-color: var(--line);
  -webkit-backdrop-filter: blur(14px) saturate(140%); backdrop-filter: blur(14px) saturate(140%);
}
.site-header__inner {
  height: 100%; width: min(100% - (var(--gutter) * 2), 90rem); margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}
.brand { display: inline-flex; align-items: center; gap: .8rem; position: relative; z-index: 3; }
.brand__mark { height: 2.5rem; width: auto; transition: transform var(--t-med) var(--ease); }
.brand:hover .brand__mark { transform: rotate(-6deg) scale(1.04); }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name { font-weight: 700; font-size: 1rem; letter-spacing: .01em; color: var(--text); }
.brand__place { font-weight: 500; font-size: .72rem; letter-spacing: .26em; text-transform: uppercase; color: var(--sand); margin-top: .2rem; }

.scroll-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; pointer-events: none; }
.scroll-progress span { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, var(--blue), var(--blue-300)); transform-origin: left; transform: scaleX(var(--progress, 0)); }

/* Navigation: Mobile = Vollbild-Overlay */
.nav {
  position: fixed; inset: 0; z-index: 2; background: var(--bg);
  padding: calc(var(--header-h) + 2rem) var(--gutter) 2rem;
  display: flex; flex-direction: column; justify-content: space-between;
  visibility: hidden; opacity: 0; transform: translate3d(0, -12px, 0);
  transition: opacity var(--t-med) var(--ease), transform var(--t-med) var(--ease), visibility 0s linear var(--t-med);
  background-image: radial-gradient(60rem 30rem at 90% 0%, rgba(30, 43, 232, .22), transparent 60%);
}
body.nav-open .nav { visibility: visible; opacity: 1; transform: none; transition-delay: 0s; }
body.nav-open { overflow: hidden; }
.nav__list { display: flex; flex-direction: column; }
.nav__list li { border-bottom: 1px solid var(--line); }
.nav__list a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem 0; font-family: var(--font-display); font-size: clamp(2rem, 8vw, 2.8rem); font-weight: 600; color: var(--text);
  line-height: 1.1; transition: color var(--t-fast), padding-left var(--t-med) var(--ease);
}
.nav__list a:hover { padding-left: .6rem; color: var(--sand); }
.nav__list a[aria-current="page"] { color: var(--sand); }
.nav__foot { font-size: .8rem; color: var(--text-3); letter-spacing: .04em; }

.nav-toggle { position: relative; z-index: 3; width: 3rem; height: 3rem; border-radius: 50%; border: 1px solid var(--line-strong); display: grid; place-items: center; transition: background-color var(--t-fast), border-color var(--t-fast); }
.nav-toggle:hover { background: rgba(255, 255, 255, .06); border-color: rgba(190, 200, 255, .55); }
.nav-toggle__bars { position: relative; width: 1.15rem; height: .75rem; }
.nav-toggle__bars span { position: absolute; left: 0; right: 0; height: 2px; border-radius: 2px; background: var(--text); transition: transform var(--t-med) var(--ease), top var(--t-med) var(--ease); }
.nav-toggle__bars span:first-child { top: 0; }
.nav-toggle__bars span:last-child { top: calc(100% - 2px); }
body.nav-open .nav-toggle__bars span:first-child { top: calc(50% - 1px); transform: rotate(45deg); }
body.nav-open .nav-toggle__bars span:last-child { top: calc(50% - 1px); transform: rotate(-45deg); }

@media (min-width: 1000px) {
  .nav-toggle { display: none; }
  .nav {
    position: static; inset: auto; padding: 0; background: none; background-image: none;
    flex-direction: row; visibility: visible; opacity: 1; transform: none; transition: none;
  }
  .nav__foot { display: none; }
  .nav__list { flex-direction: row; align-items: center; gap: .15rem; }
  .nav__list li { border: 0; }
  .nav__list a {
    position: relative; padding: .6rem .95rem; font-family: var(--font-ui); font-size: .875rem; font-weight: 500; letter-spacing: .01em;
    color: var(--text-2); border-radius: var(--r-pill);
  }
  .nav__list a:hover { padding-left: .95rem; color: var(--text); }
  .nav__list a:not(.nav__cta)::after {
    content: ""; position: absolute; left: .95rem; right: .95rem; bottom: .3rem; height: 1px; background: var(--sand);
    transform: scaleX(0); transform-origin: left; transition: transform var(--t-med) var(--ease);
  }
  .nav__list a:not(.nav__cta):hover::after, .nav__list a[aria-current="page"]::after { transform: scaleX(1); }
  .nav__list a[aria-current="page"] { color: var(--text); }
  .nav__cta { margin-left: .6rem; border: 1px solid var(--line-strong); color: var(--text) !important; font-weight: 600 !important; transition: background-color var(--t-fast), border-color var(--t-fast), transform var(--t-med) var(--ease); }
  .nav__cta:hover { background: var(--text); color: var(--ink) !important; border-color: var(--text); transform: translateY(-1px); }
  .nav__cta[aria-current="page"] { background: rgba(255, 255, 255, .08); }
}

/* ---------- Footer ---------- */
.site-footer { position: relative; border-top: 1px solid var(--line); background: linear-gradient(180deg, var(--bg), #03050d); padding-top: clamp(4rem, 8vw, 7rem); }
.site-footer__top { display: grid; gap: 3rem; padding-bottom: clamp(3rem, 6vw, 5rem); }
.site-footer__claim img { height: 3.4rem; width: auto; margin-bottom: 1.5rem; opacity: .95; }
.site-footer__quote { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.4rem, 5.5vw, 4.2rem); line-height: 1; color: var(--text); letter-spacing: -.01em; }
.site-footer__quote em { font-style: normal; color: var(--sand); }
.site-footer__sub { margin-top: 1rem; max-width: 24rem; color: var(--text-3); font-size: .95rem; }
.site-footer__h { font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--text-3); margin-bottom: 1rem; }
.site-footer__h--spaced { margin-top: 2rem; }
.site-footer__col li + li { margin-top: .55rem; }
.site-footer__col a { color: var(--text-2); font-size: .9375rem; transition: color var(--t-fast); display: inline-flex; align-items: center; gap: .4rem; }
.site-footer__col a:hover { color: var(--text); }
.site-footer__col .arr { width: 1em; height: 1em; color: var(--blue-300); }
.site-footer__col li { color: var(--text-2); font-size: .9375rem; }
.site-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-block: 1.75rem; border-top: 1px solid var(--line); font-size: .8125rem; color: var(--text-3); }
.site-footer__bottom ul { display: flex; gap: 1.5rem; }
.site-footer__bottom a:hover { color: var(--text); }
@media (min-width: 900px) { .site-footer__top { grid-template-columns: 1.6fr 1fr 1fr; gap: 4rem; } }

/* ---------- Scroll-Reveal (Animation Principle: nur opacity + transform) ---------- */
.js [data-reveal] {
  opacity: 0; transform: translate3d(0, 1.75rem, 0);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.js [data-reveal="fade"]  { transform: none; }
.js [data-reveal="left"]  { transform: translate3d(-2.25rem, 0, 0); }
.js [data-reveal="right"] { transform: translate3d(2.25rem, 0, 0); }
.js [data-reveal="scale"] { transform: scale(.965); }
.js [data-reveal="line"]  { opacity: 1; transform: scaleX(0); transform-origin: left; transition-duration: 1.4s; }
.js [data-reveal].is-in { opacity: 1; transform: none; }

/* Scroll-getriebene Wort-Hervorhebung (JS teilt Text in Wörter) */
.js [data-words] .w { opacity: .22; transition: opacity .45s var(--ease-soft); }
.js [data-words] .w.on { opacity: 1; }

/* Parallax: nutzt die einzelne CSS-Property "translate" (kollidiert nicht mit transform) */
[data-parallax] { translate: 0 var(--py, 0px); will-change: translate; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; transition-delay: 0s !important; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .js [data-words] .w { opacity: 1 !important; }
  [data-parallax] { translate: none !important; will-change: auto; }
}

/* ---------- Utilities ---------- */
.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; }
.br-md { display: none; }
@media (min-width: 720px) { .br-md { display: inline; } }

/* Zeilen-Maske für Headlines (Text gleitet aus einer Linie ein) */
.mask { display: block; overflow: hidden; padding: .06em 0 .16em; margin: -.06em 0 -.16em; }
.js [data-reveal="mask"] { opacity: 1; transform: none; }
.js .mask > span { display: inline-block; transform: translate3d(0, 112%, 0); transition: transform 1.15s var(--ease); transition-delay: calc(var(--i, 0) * 130ms); }
.js [data-reveal="mask"].is-in .mask > span { transform: none; }
@media (prefers-reduced-motion: reduce) { .js .mask > span { transform: none !important; } }