/* Aufbau einer Seite (werefine.de, Startseite): sechs abstrakte Glasebenen, die beim Scrollen auseinanderfahren.
   Nur transform und opacity, keine Bilder, kein backdrop-filter in der 3D-Szene (Leistung).
   Am Rechner gepinnt und scrollgesteuert (js/aufbau.js setzt --e und data-active), am Telefon und bei
   reduzierter Bewegung steht die Szene offen da und fährt einmal beim Einblenden auseinander.
   Farben sind die vier Markenfarben (--green, --blue, --purple, --amber) der Startseite. */
.xp { --g: 54px; --e: 0; --ease: cubic-bezier(.16, 1, .3, 1); position: relative; height: 300vh; overflow-x: clip; }
html:not(.js) .xp { --e: 1; height: auto; }
.xp.is-in { --e: 1; }
.xp-pin { position: sticky; top: 0; height: 100vh; height: 100svh; display: flex; align-items: center; overflow: clip; }
.xp-inner { width: 100%; padding: calc(78px + .6rem) 0 1.2rem; }
.xp-head { max-width: var(--sec-max); margin: 0 auto; padding: 0 var(--gutter); text-align: center; }
.xp-head .section-title { max-width: none; margin-bottom: 0; }
.xp-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; max-width: var(--sec-max); margin: clamp(.4rem, 2vh, 1.6rem) auto 0; padding: 0 var(--gutter); }

/* Bühne */
.xp-stage { position: relative; width: min(92%, 540px, 64vh); aspect-ratio: 1 / 1; margin: 0 auto; perspective: 1500px; perspective-origin: 50% 36%; }
.xp-glow { position: absolute; inset: -14% -14%; pointer-events: none;
  background: radial-gradient(38% 38% at 30% 62%, rgba(45,255,160,.20), transparent 70%), radial-gradient(34% 34% at 74% 30%, rgba(165,135,255,.20), transparent 70%), radial-gradient(30% 30% at 62% 78%, rgba(76,196,255,.16), transparent 70%); opacity: calc(.35 + var(--e) * .65); }
.xp-scene { position: absolute; inset: 0; transform-style: preserve-3d; transform: rotateX(60deg) rotateZ(-36deg) translateZ(calc(var(--e) * -5 * var(--g) * .5)); }
.xp-layer { position: absolute; inset: 8%; border-radius: 20px; color: var(--c); transform-style: flat;
  background: linear-gradient(155deg, color-mix(in srgb, var(--c) 24%, transparent), color-mix(in srgb, var(--c) 6%, transparent) 62%), rgba(10, 15, 22, .46);
  border: 1px solid color-mix(in srgb, var(--c) 58%, transparent);
  box-shadow: inset 1px 1px 0 rgba(255,255,255,.38), inset -1px -1px 0 rgba(255,255,255,.12), 0 34px 60px -34px color-mix(in srgb, var(--c) 80%, transparent);
  transform: translateZ(calc(var(--i) * var(--e) * var(--g)));
  transition: opacity .35s ease, box-shadow .35s ease; will-change: transform; }
.xp:not(.is-driven) .xp-layer { transition: transform 1.5s var(--ease) calc(var(--i) * 80ms), opacity .35s ease, box-shadow .35s ease; }
.xp-layer svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; overflow: visible; }
.xp-layer.is-on { opacity: 1; border-color: var(--c); box-shadow: inset 1px 1px 0 rgba(255,255,255,.5), inset -1px -1px 0 rgba(255,255,255,.18), 0 0 46px -4px color-mix(in srgb, var(--c) 70%, transparent), 0 34px 60px -30px color-mix(in srgb, var(--c) 90%, transparent); }
.xp[data-active] .xp-layer:not(.is-on) { opacity: .5; }
.xp-pillar { position: absolute; left: var(--x); top: var(--y); width: 1px; height: calc(5 * var(--e) * var(--g)); transform-origin: 0 0; transform: rotateX(90deg);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.34)); }
.xp:not(.is-driven) .xp-pillar { transition: height 1.5s var(--ease); }

/* Liste: Schrift statt Kästen, Farbe als feine Linie */
.xp-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: clamp(.4rem, 1.5vh, 1.15rem); }
.xp-item { --c: var(--green); display: grid; grid-template-columns: 2.6rem minmax(0, 1fr); gap: .2rem .9rem; padding: .15rem 0 .15rem 1.1rem; border-left: 2px solid color-mix(in srgb, var(--c) 32%, transparent); transition: border-color .3s ease, opacity .3s ease; }
.xp-n { font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; color: var(--c); padding-top: .32rem; }
.xp-item h3 { margin: 0; font-family: var(--sans); font-size: clamp(1rem, min(1.5vw, 2.4vh), 1.3rem); font-weight: 700; letter-spacing: -.01em; color: var(--text); line-height: 1.25; }
.xp-item p { margin: .15rem 0 0; grid-column: 2; font-size: clamp(.82rem, 1.7vh, .95rem); line-height: 1.5; color: var(--muted); max-width: 46ch; }
.xp[data-active] .xp-item:not(.is-on) { opacity: .46; }
.xp-item.is-on { border-left-color: var(--c); }
.xp-item.is-on p { color: #cfdbe7; }

/* Niedrige Fenster (Laptop): Kicker weg, Kopf enger, damit Liste und Titel im Bild bleiben */
@media (min-width: 901px) and (max-height: 820px) {
  .xp-head .label { display: none; }
  .xp-inner { padding-top: calc(70px + .2rem); padding-bottom: .6rem; }
  .xp-head .section-title { font-size: clamp(1.7rem, 3.4vh, 2.4rem); }
}

/* Telefon und Tablet: kein Pin, offene Szene, Liste darunter */
@media (max-width: 900px) {
  .xp, .xp.is-driven { height: auto; }
  .xp-pin { position: static; height: auto; overflow: visible; display: block; }
  .xp-inner { padding: var(--sec-pad) 0; }
  .xp-grid { grid-template-columns: minmax(0, 1fr); gap: 2.2rem; margin-top: 2.4rem; }
  .xp-stage { width: min(88vw, 440px); margin-bottom: .4rem; }
  .xp-glow { inset: -4% -4%; }
  .xp-scene { scale: .76; transform: rotateX(58deg) rotateZ(-34deg) translateZ(calc(var(--e) * -5 * var(--g) * .5)); }
  .xp { --g: 46px; }
  .xp-item p { max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
  .xp { --e: 1; }
  .xp-layer, .xp:not(.is-driven) .xp-layer, .xp:not(.is-driven) .xp-pillar { transition: none; }
}