/* ==========================================================================
   Como funciona: três etapas ligadas por uma linha que se desenha ao rolar
   A linha usa animation-timeline: view() (progressivo). Sem suporte ou com movimento
   reduzido ela aparece já desenhada.
   ========================================================================== */

.process {
  position: relative;
  display: grid;
  gap: 2.5rem;
  margin-top: clamp(2.5rem, 2rem + 3vw, 4.5rem);
  padding-left: 2rem;
}

/* linha vertical (celular) / horizontal (desktop) */
.process::before,
.process::after {
  content: "";
  position: absolute;
  top: 0.5rem;
  bottom: 0.5rem;
  left: 0;
  width: 1px;
  background: var(--c-line-strong);
}

.process::after {
  background: rgb(var(--c-violet));
  box-shadow: 0 0 14px rgb(var(--c-violet) / 0.8);
  transform-origin: top;
}

.process__step {
  position: relative;
}

/* nó da linha */
.process__step::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: -2rem;
  width: 0.5625rem;
  height: 0.5625rem;
  margin-left: -0.28rem;
  border-radius: 50%;
  background: var(--c-ink);
  box-shadow: 0 0 0 1px var(--c-white);
}

.process__number {
  display: block;
  /* Numeral com degradê (decorativo, aria-hidden). Evita text-stroke, que mostra os contornos
     sobrepostos da fonte variável. */
  background: linear-gradient(180deg, var(--c-white) 5%, var(--c-line-strong) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(3.5rem, 2.5rem + 4vw, 6.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}

.process__title {
  margin-top: 1.25rem;
  font-size: var(--fs-h3);
  letter-spacing: -0.03em;
}

.process__text {
  max-width: 24rem;
  margin-top: 0.625rem;
  color: var(--c-chalk);
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .process::after {
      animation: process-draw linear both;
      animation-timeline: view();
      animation-range: entry 10% cover 70%;
    }
  }
}

@keyframes process-draw {
  from {
    scale: 1 0;
  }
}

@media (width >= 60em) {
  .process {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(2rem, 1rem + 3vw, 4rem);
    padding: 2.5rem 0 0;
  }

  .process::before,
  .process::after {
    inset: 0.5rem 0 auto;
    width: auto;
    height: 1px;
  }

  .process::after {
    transform-origin: left;
  }

  .process__step::before {
    top: -2.5rem;
    left: 0;
    margin: -0.28rem 0 0;
  }

  @supports (animation-timeline: view()) {
    @media (prefers-reduced-motion: no-preference) {
      .process::after {
        animation-name: process-draw-x;
      }
    }
  }
}

@keyframes process-draw-x {
  from {
    scale: 0 1;
  }
}