/* ============================================================
   SMY AGENCY — ROTER FADEN (Services-Timeline)
   Vertikale rote Linie, die sich beim Scrollen füllt.
   Jede Leistung = Station mit aufleuchtendem Knoten.
   Scoped auf .thread, baut auf design-system.css auf.
   ============================================================ */

.thread {
  position: relative;
  max-width: 940px;
  margin: var(--space-2xl) auto 0;
  --thread: 0;
}

/* ── Die Linie (Track + roter Füll-Fortschritt + Glüh-Punkt) ── */
.thread__line {
  position: absolute;
  top: 12px; bottom: 12px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: var(--border-strong);
  border-radius: 2px;
  z-index: 1;
}
.thread__fill {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, var(--smy-red), var(--smy-red-bright));
  box-shadow: 0 0 14px var(--smy-red-glow);
  transform: scaleY(var(--thread));
  transform-origin: top center;
  /* glättet gebündelte Scroll-Updates auf iOS → flüssige Füllung */
  transition: transform 0.3s linear;
}
.thread__tip {
  position: absolute;
  left: 50%;
  top: calc(var(--thread) * 100%);
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--smy-red-bright);
  box-shadow: 0 0 0 4px var(--smy-red-soft), 0 0 22px 5px var(--smy-red-glow);
  transform: translate(-50%, -50%);
  z-index: 4;
  opacity: clamp(0, calc(var(--thread) * 30), 1);
  transition: top 0.3s linear;
}

/* ── Station ── */
.thread__step {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
  perspective: 1000px;
}
.thread__step:last-child { margin-bottom: 0; }

/* Knoten auf der Linie */
.thread__node {
  position: absolute;
  left: 50%;
  top: 26px;
  transform: translate(-50%, -50%);
  width: 54px; height: 54px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--bg-panel);
  border: 2px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--text-muted);
  z-index: 3;
  transition: color .4s ease, background .4s ease,
              border-color .4s ease, box-shadow .4s ease, transform .4s ease;
}
.thread__step.is-lit .thread__node {
  background: var(--smy-red);
  border-color: var(--smy-red-bright);
  color: #fff;
  box-shadow: 0 0 0 7px var(--smy-red-soft), 0 0 28px var(--smy-red-glow);
}

/* ── Karte ── */
.thread__card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  opacity: 0;
  transform: translateX(-34px);
  transition: opacity .7s cubic-bezier(0.16,1,0.3,1),
              transform .7s cubic-bezier(0.16,1,0.3,1),
              border-color var(--transition-base),
              box-shadow var(--transition-base);
}
.thread__step.is-in .thread__card { opacity: 1; transform: none; }

/* Seiten-Verteilung (Zickzack) */
.thread__step--left  .thread__card { grid-column: 1; }
.thread__step--right .thread__card { grid-column: 2; }
.thread__step--right .thread__card { transform: translateX(34px); }
.thread__step.is-in.thread__step--right .thread__card { transform: none; }

/* kleiner Konnektor von der Karte zur Linie */
.thread__card::after {
  content: "";
  position: absolute;
  top: 26px;
  width: var(--space-3xl);
  height: 2px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}
.thread__step--left  .thread__card::after { right: calc(var(--space-3xl) * -1); background: linear-gradient(90deg, var(--border-strong), transparent); }
.thread__step--right .thread__card::after { left:  calc(var(--space-3xl) * -1); background: linear-gradient(270deg, var(--border-strong), transparent); }

.thread__card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

/* Karten-Inhalt */
.thread__card-head {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.thread__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  flex: none;
  border-radius: var(--radius-md);
  background: var(--smy-red-soft);
  border: 1px solid var(--border-accent);
  font-size: 1.3rem;
  transition: transform var(--transition-base);
}
.thread__card:hover .thread__icon { transform: scale(1.08) rotate(-6deg); }
.thread__card h3 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  color: var(--text-primary);
}
.thread__card > p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}
.thread__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md);
  display: grid;
  gap: var(--space-2xs);
}
.thread__list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: var(--fs-sm);
  color: var(--text-primary);
}
.thread__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--smy-red);
}
.thread__more {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--smy-red-bright);
  display: inline-flex;
  gap: var(--space-2xs);
  transition: gap var(--transition-base);
}
.thread__card:hover .thread__more { gap: var(--space-sm); }

/* ── Mobile: Linie links, alles einspaltig ── */
@media (max-width: 760px) {
  .thread { margin-top: var(--space-xl); }
  .thread__line { left: 26px; }
  .thread__tip { left: 26px; }
  .thread__step {
    grid-template-columns: 1fr;
    margin-bottom: var(--space-xl);
    padding-left: 72px;
  }
  .thread__node { left: 26px; width: 48px; height: 48px; }
  .thread__card,
  .thread__step--left .thread__card,
  .thread__step--right .thread__card { grid-column: 1; transform: translateX(24px); }
  .thread__step.is-in .thread__card { transform: none; }
  .thread__card::after,
  .thread__step--left .thread__card::after,
  .thread__step--right .thread__card::after {
    left: -46px; right: auto;
    width: 46px;
    background: linear-gradient(270deg, var(--border-strong), transparent);
  }
}

/* Motion läuft bewusst auf allen Geräten gleich (Mobile = Desktop). */