/* process.css — Horizontal process flow with blueprint connecting line */

.process {
  background: var(--off-white);
}

.process h2 {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  max-width: 500px;
}

.process__track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.5rem, 3vw, 2rem);
  position: relative;
}

/* Blueprint-style connecting line — animates in via clip-path */
.process__line {
  position: absolute;
  top: 1.75rem; /* align with center of number */
  left: 2rem;
  right: 2rem;
  height: 1px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--blue) 0,
    var(--blue) 8px,
    transparent 8px,
    transparent 14px
  );
  background-color: transparent;
  opacity: 0.25;
  clip-path: inset(0 100% 0 0);
  transition: none;
}

.process__line.is-drawn {
  clip-path: inset(0 0% 0 0);
  transition: clip-path 1.2s cubic-bezier(0.77, 0, 0.175, 1);
}

.process__step {
  position: relative;
  z-index: 1;
}

/* Experiment phase tag */
.process__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--blue);
  background: var(--blue-tint);
  border: 1px solid rgba(26, 111, 212, 0.15);
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  margin-bottom: 0.625rem;
  display: block;
}

/* Hypothesis notation line */
.process__notation {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: 0.625rem;
  padding-top: 0.625rem;
  border-top: 1px solid var(--whisper-border);
}

.process__number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 1rem;
  background: var(--off-white); /* mask the line behind it */
  padding-right: 0.5rem;
}

.process__step h3 {
  margin-bottom: 0.5rem;
}

.process__step p {
  color: var(--text-mid);
  font-size: var(--text-caption);
  max-width: 28ch;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .process__track {
    grid-template-columns: 1fr;
    padding-left: 2.5rem;
  }

  .process__line {
    top: 0;
    bottom: 0;
    left: 0.75rem;
    right: auto;
    width: 1px;
    height: auto;
    background-image: repeating-linear-gradient(
      180deg,
      var(--blue) 0,
      var(--blue) 8px,
      transparent 8px,
      transparent 14px
    );
    background-color: transparent;
    clip-path: inset(0 0 100% 0);
  }

  .process__line.is-drawn {
    clip-path: inset(0 0 0% 0);
    transition: clip-path 1.2s cubic-bezier(0.77, 0, 0.175, 1);
  }

  .process__number {
    background: var(--off-white);
    padding-bottom: 0.25rem;
  }

  .process__step p {
    max-width: 100%;
  }
}