/* ==========================================================================
   udokerzinger.de · Dachmarke — Grundlagen
   Reset, Typografie, Links, Buttons, Fokus, Raster, Bewegungsgrundsatz.
   ========================================================================== */

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

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

body, h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd {
  margin: 0;
  padding: 0;
}

ul[role='list'], ol[role='list'] { list-style: none; }

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

button, input, textarea, select { font: inherit; color: inherit; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  /* Umfaerben beim Weltenwechsel: langsam, damit nichts umspringt. */
  transition: background-color var(--t-world) var(--ease-soft);
}

/* Der Seitenhintergrund folgt der aktiven Welt ganz leicht mit.
   Der Wert kommt aus dem Markensystem, nicht von hier. */
:root[data-world] body { background-color: var(--world-tint); }


/* ---------- Typografie ---------------------------------------------------- */

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: var(--lh-head);
  letter-spacing: var(--ls-head);
  text-wrap: balance;
}

.t-display {
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  font-weight: 400;
  line-height: var(--lh-display);
  letter-spacing: var(--ls-display);
}

.t-h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: var(--ls-display);
}

.t-h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: var(--ls-head);
}

.t-h3 {
  font-size: var(--fs-h3);
  font-weight: 600;
}

.t-lead {
  font-size: var(--fs-lead);
  line-height: var(--lh-snug);
  color: var(--muted);
  max-width: 34ch;
}

.t-body { max-width: 62ch; }

.t-eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}

.t-muted { color: var(--muted); }
.t-serif { font-family: var(--font-serif); font-weight: 400; }

/* Zeilenweise Headlines: jede Zeile ein eigenes Element, damit sie
   nacheinander einfahren koennen. */
.line { display: block; }


/* ---------- Links --------------------------------------------------------- */

a { color: inherit; }

a.plain {
  text-decoration: none;
  color: var(--muted);
  transition: color var(--t-fast) var(--ease);
}
a.plain:hover { color: var(--ink); }


/* ---------- Der Pfeil-Link (Standard-CTA) --------------------------------- */

.arrow-link {
  --arrow-shift: 0px;
  display: inline-flex;
  align-items: baseline;
  gap: .6em;
  text-decoration: none;
  font-weight: 500;
  font-size: var(--fs-body);
  color: var(--accent-strong);
  padding-block: .35em;
  position: relative;
  transition: color var(--t-base) var(--ease);
}

.arrow-link .label {
  position: relative;
  white-space: nowrap;
}

/* Unterstrich waechst von links, statt einfach da zu sein. */
.arrow-link .label::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -.16em;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  opacity: .5;
  transition: transform var(--t-slow) var(--ease);
}

.arrow-link:hover .label::after,
.arrow-link:focus-visible .label::after { transform: scaleX(1); }

.arrow-link .arrow {
  display: inline-block;
  transform: translateX(var(--arrow-shift));
  transition: transform var(--t-base) var(--ease);
}

.arrow-link:hover .arrow,
.arrow-link:focus-visible .arrow { --arrow-shift: 5px; }


/* ---------- Gefuellter Button (magnetisch) -------------------------------- */

.btn {
  --mx: 0px;
  --my: 0px;
  display: inline-flex;
  align-items: center;
  gap: .7em;
  padding: .95em 1.6em;
  border: 0;
  border-radius: var(--r-pill);
  background: var(--accent-strong);
  color: var(--accent-on);
  font-size: var(--fs-body);
  font-weight: 500;
  letter-spacing: -.01em;
  text-decoration: none;
  cursor: pointer;
  will-change: transform;
  transform: translate3d(var(--mx), var(--my), 0);
  transition: transform var(--t-base) var(--ease),
              background-color var(--t-slow) var(--ease-soft),
              box-shadow var(--t-base) var(--ease);
}

.btn:hover { box-shadow: var(--shadow-lift); }

.btn .arrow {
  display: inline-block;
  transition: transform var(--t-base) var(--ease);
}
.btn:hover .arrow { transform: translateX(5px); }

.btn--ghost {
  background: transparent;
  color: var(--accent-strong);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}
.btn--ghost:hover {
  box-shadow: inset 0 0 0 1px var(--accent-strong), var(--shadow-soft);
}


/* ---------- Fokus --------------------------------------------------------- */

:focus { outline: none; }

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* Im SVG braucht der Fokusring einen eigenen Weg — outline greift dort
   nicht zuverlaessig ueber Browser hinweg. */
.wheel__hit:focus-visible { outline: none; }

.skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: var(--z-skip);
  background: var(--ink);
  color: var(--paper);
  padding: .75em 1.2em;
  border-radius: var(--r-md);
  text-decoration: none;
  transition: top var(--t-base) var(--ease);
}
.skip:focus-visible { top: 1rem; }


/* ---------- Raster -------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: var(--w-page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--wide { max-width: var(--w-wide); }
.wrap--text { max-width: calc(var(--w-text) + 2 * var(--gutter)); }

.section { padding-block: var(--section-y); }
.section--tight { padding-block: var(--section-y-s); }

/* Der Kopf liegt fest oben — Sprungziele duerfen nicht darunter landen. */
[id] { scroll-margin-top: clamp(4.5rem, 3.5rem + 3vw, 6.5rem); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}


/* ---------- Reveal beim Scrollen ------------------------------------------
   Einmalig, 16–28px nach oben, nie wiederholt. Ohne JavaScript sichtbar. */

.reveal {
  opacity: 0;
  transform: translate3d(0, 26px, 0);
  transition: opacity var(--t-reveal) var(--ease),
              transform var(--t-reveal) var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

html.no-js .reveal { opacity: 1; transform: none; }


/* ---------- Bewegungsgrundsatz -------------------------------------------
   prefers-reduced-motion schaltet Bewegung ab. Kein Kompromiss.
   Inhalte bleiben vollstaendig sichtbar und bedienbar.                     */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal { opacity: 1 !important; transform: none !important; }
}