/* ==========================================================================
   How It Works — Premium realtime timeline
   ========================================================================== */

.how-it-works--premium {
  position: relative;
  overflow: hidden;
}

.how-it-works__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.how-it-works__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(84px);
  opacity: 0.35;
}

.how-it-works__orb--emerald {
  width: min(420px, 56vw);
  height: min(420px, 56vw);
  top: -8%;
  right: -7%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, transparent 70%);
}

.how-it-works__orb--violet {
  width: min(320px, 48vw);
  height: min(320px, 48vw);
  bottom: 0;
  left: -6%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
}

.how-it-works__grid {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: linear-gradient(rgba(5, 150, 105, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(5, 150, 105, 0.3) 1px, transparent 1px);
  background-size: 56px 56px;
}

.how-it-works__container {
  position: relative;
  z-index: 1;
}

.timeline--premium {
  position: relative;
  display: grid;
  gap: var(--space-5);
  max-width: 980px;
  margin-inline: auto;
  perspective: 1200px;
}

.timeline--premium .timeline__progress-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 27px;
  width: 2px;
  border-radius: var(--radius-full);
  background: linear-gradient(
    180deg,
    rgba(16, 185, 129, 0.18) 0%,
    rgba(16, 185, 129, 0.5) 45%,
    rgba(99, 102, 241, 0.35) 100%
  );
  transform-origin: top center;
  animation: timelineLineFlow 5s ease-in-out infinite;
}

@keyframes timelineLineFlow {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 0.95; }
}

.timeline--premium .timeline__step {
  --tilt-x: 0;
  --tilt-y: 0;
  --lift: 0;
  --glow: 0;
  --shine-x: 50%;
  --shine-y: 50%;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-4);
  align-items: start;
  opacity: 0;
  transform: perspective(1000px) translate3d(0, 32px, 0);
  transition:
    opacity 0.55s cubic-bezier(0.23, 1, 0.32, 1),
    transform 0.22s cubic-bezier(0.23, 1, 0.32, 1);
}

.timeline--premium .timeline__step.is-visible {
  opacity: 1;
  transform: perspective(1000px)
    rotateX(calc(var(--tilt-y) * -1deg))
    rotateY(calc(var(--tilt-x) * 1deg))
    translate3d(0, calc(var(--lift) * -1px), 0);
}

.timeline--premium .timeline__step.is-active,
.timeline--premium .timeline__step:hover {
  --lift: 10;
  --glow: 1;
}

.timeline__marker-wrap {
  position: relative;
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
}

.timeline__marker-ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(5, 150, 105, 0.95),
    rgba(52, 211, 153, 0.95),
    rgba(99, 102, 241, 0.65),
    rgba(5, 150, 105, 0.95)
  );
  animation: timelineRingSpin 6.5s linear infinite;
}

@keyframes timelineRingSpin {
  to { transform: rotate(360deg); }
}

.timeline--premium .timeline__marker {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  margin: 0;
  border-radius: 50%;
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-primary-dark);
  background: #fff;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.timeline__body {
  position: relative;
  overflow: hidden;
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-xl);
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.97) 0%,
    rgba(248, 250, 252, 0.94) 100%
  );
  border: 1px solid rgba(226, 232, 240, 0.95);
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 14px 30px rgba(15, 23, 42, 0.07);
  transition:
    border-color 0.22s ease,
    box-shadow 0.22s ease;
}

.timeline__body::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    135deg,
    rgba(5, 150, 105, calc(var(--glow) * 0.55)),
    transparent 40%,
    rgba(99, 102, 241, calc(var(--glow) * 0.3))
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.timeline__body::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: calc(var(--glow) * 0.9);
  background: radial-gradient(
    280px circle at var(--shine-x) var(--shine-y),
    rgba(255, 255, 255, 0.55) 0%,
    rgba(16, 185, 129, 0.12) 34%,
    transparent 66%
  );
}

.timeline--premium .timeline__step.is-active .timeline__body,
.timeline--premium .timeline__step:hover .timeline__body {
  border-color: rgba(5, 150, 105, 0.34);
  box-shadow:
    0 6px 12px rgba(15, 23, 42, 0.06),
    0 22px 50px rgba(5, 150, 105, 0.16);
}

.timeline__kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-dark);
}

.timeline__kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.12);
}

.timeline__title {
  margin: 0 0 var(--space-2);
  font-size: clamp(1.0625rem, 2vw, 1.3rem);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

.timeline__desc {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.78;
  color: var(--color-text-secondary);
}

.timeline__meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  background: rgba(241, 245, 249, 0.9);
  border-radius: var(--radius-full);
}

.timeline__meta-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: timelineMetaPulse 1.8s ease-in-out infinite;
}

@keyframes timelineMetaPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.7); opacity: 0.55; }
}

@media (max-width: 767px) {
  .timeline--premium .timeline__progress-line {
    left: 23px;
  }

  .timeline--premium .timeline__step {
    grid-template-columns: 48px 1fr;
    gap: var(--space-3);
  }

  .timeline__marker-wrap {
    width: 48px;
    height: 48px;
  }

  .timeline__body {
    padding: var(--space-4) var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .timeline--premium .timeline__progress-line,
  .timeline__marker-ring,
  .timeline__meta-dot {
    animation: none !important;
  }

  .timeline--premium .timeline__step,
  .timeline--premium .timeline__step.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }
}