/* ==========================================================================
   REIFENWERK — Basis-Layer (Reset, Utilities, gemeinsame Interaktions-Struktur)
   Wird von allen drei Konzepten geladen. Visuelle Gestaltung: k1.css / k2.css / k3.css
   ========================================================================== */

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

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

body {
  margin: 0;
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, iframe, video { display: block; max-width: 100%; }
svg { height: auto; }

h1, h2, h3, h4, h5, p, dl, dd, dt, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
select { appearance: none; border-radius: 0; }
summary { cursor: pointer; }
summary::-webkit-details-marker { display: none; }

:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

::selection { background: var(--selection-bg, #d9ff3d); color: var(--selection-fg, #000); }

/* --- Accessibility helpers -------------------------------------------------- */

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

.skip-link {
  position: fixed;
  top: .75rem; left: .75rem;
  z-index: 200;
  padding: .7rem 1.1rem;
  border-radius: .6rem;
  background: var(--skip-bg, #111);
  color: var(--skip-fg, #fff);
  font-size: .85rem;
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform .25s ease;
}
.skip-link:focus-visible { transform: translateY(0); }

[hidden] { display: none !important; }

/* --- Scroll-Reveal ---------------------------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translate3d(0, var(--reveal-y, 26px), 0);
  transition:
    opacity .9s var(--ease-out, cubic-bezier(.22, .61, .36, 1)) var(--reveal-delay, 0ms),
    transform .9s var(--ease-out, cubic-bezier(.22, .61, .36, 1)) var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].is-in {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* --- Sticky Header: Hide-on-Scroll ----------------------------------------- */

[data-header] {
  transition: transform .45s var(--ease-out, cubic-bezier(.22, .61, .36, 1));
}
[data-header].is-hidden { transform: translateY(-101%); }

/* --- Scroll-Progress ------------------------------------------------------- */

[data-progress] {
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
}

/* --- Marquee (Track enthält zwei identische Gruppen) ----------------------- */

.marquee {
  display: flex;
  overflow: hidden;
  width: 100%;
  -webkit-mask-image: var(--marquee-mask, none);
  mask-image: var(--marquee-mask, none);
}
.marquee__track {
  display: flex;
  flex: none;
  width: max-content;
  animation: marquee-scroll var(--marquee-duration, 44s) linear infinite;
  animation-direction: var(--marquee-direction, normal);
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__group {
  display: flex;
  flex: none;
  align-items: center;
  gap: var(--marquee-gap, 3rem);
  padding-right: var(--marquee-gap, 3rem);
}

@keyframes marquee-scroll {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, 0, 0); }
}

/* --- Reifenfinder: gemeinsame Ergebnis-Struktur ---------------------------- */

.result-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.result-card {
  display: grid;
  gap: .45rem;
  align-content: start;
  padding: 1.1rem;
  border: 1px solid var(--result-line, currentColor);
  border-radius: var(--result-radius, 1rem);
  background: var(--result-bg, transparent);
  color: var(--result-fg, inherit);
  animation: result-in .55s var(--ease-out, cubic-bezier(.22, .61, .36, 1)) both;
  animation-delay: var(--result-delay, 0ms);
}
@keyframes result-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.result-brand {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  opacity: .62;
}
.result-name {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.25;
}
.result-spec {
  font-size: .82rem;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
  opacity: .72;
}
.result-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-top: .55rem;
  padding-top: .8rem;
  border-top: 1px solid var(--result-line, currentColor);
}
.result-price {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.result-price small {
  display: block;
  margin-top: .3rem;
  font-size: .66rem;
  font-weight: 500;
  letter-spacing: .02em;
  opacity: .6;
}
.result-cta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem .8rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .25s ease, color .25s ease;
}
.result-cta:hover, .result-cta:focus-visible {
  background: var(--result-cta-bg, currentColor);
  color: var(--result-cta-fg, #fff);
}

.result-note {
  font-size: .7rem;
  letter-spacing: .02em;
  opacity: .62;
}

.finder-status {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: .85rem;
  opacity: .75;
}
.finder-status::before {
  content: "";
  width: .7rem; height: .7rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(1turn); } }

.finder-summary {
  margin-bottom: .9rem;
  font-size: .8rem;
  letter-spacing: .04em;
  opacity: .7;
}

/* --- Reduced Motion -------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .result-card { animation: none; }
  .marquee__track { animation: none; }
  .finder-status::before { animation: none; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}