.petrol-flow {
  --pf-petrol: var(--petrol-flow-bg, #03465b);
  --pf-butter: #fff2a6;
  --pf-dark: #072e3b;
  box-sizing: border-box;
  container-type: inline-size;
  width: 100%;
  max-width: 600px;
  margin: 0;
  background: var(--pf-petrol);
  color: var(--pf-butter);
  font-family: inherit;
}

.petrol-flow *,
.petrol-flow *::before,
.petrol-flow *::after { box-sizing: border-box; }

.petrol-flow__canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 600 / 424;
}

.petrol-flow__drawing {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.petrol-flow__ribbon--messages { fill: #2f6178; }
.petrol-flow__ribbon--sheets { fill: #629eb5; }
.petrol-flow__ribbon--entry { fill: #8cc4db; }
.petrol-flow__ribbon--checks { fill: #c8dfe0; }
.petrol-flow__ribbon--handoffs,
.petrol-flow__arrow { fill: var(--pf-butter); }

.petrol-flow__labels {
  margin: 0;
  padding: 0;
  list-style: none;
}

.petrol-flow__label {
  position: absolute;
  left: 7.4%;
  width: 26.5%;
  transform: translateY(-50%);
  margin: 0;
  padding: 0;
  color: var(--pf-dark);
  font-size: clamp(12px, 2.5cqw, 15px);
  line-height: 1.15;
  font-weight: 550;
  letter-spacing: -0.025em;
  white-space: normal;
}

.petrol-flow__label--messages {
  top: 12.264%;
  color: var(--pf-butter);
}
.petrol-flow__label--sheets { top: 31.132%; }
.petrol-flow__label--entry { top: 50%; }
.petrol-flow__label--checks { top: 68.868%; }
.petrol-flow__label--handoffs { top: 87.736%; }

.petrol-flow__destination {
  position: absolute;
  top: 65.5%;
  right: 2.1%;
  margin: 0;
  color: var(--pf-butter);
  font-size: clamp(12px, 2.6cqw, 16px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.025em;
  text-align: right;
}

.petrol-flow__caption {
  margin: 0;
  padding: 7px 2.1% 0;
  color: #b6d1d9;
  font-size: 12px;
  line-height: 1.4;
  text-align: right;
}

/* Static unless the page explicitly starts the one-time reveal. */
.petrol-flow.is-visible .petrol-flow__ribbons {
  animation: petrol-flow-reveal 850ms cubic-bezier(.3, .6, .2, 1) both;
}

.petrol-flow.is-visible .petrol-flow__arrow {
  animation: petrol-flow-arrive 250ms ease-out 650ms both;
}

@keyframes petrol-flow-reveal {
  from { clip-path: inset(0 100% 0 0); }
  to { clip-path: inset(0); }
}

@keyframes petrol-flow-arrive {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .petrol-flow.is-visible .petrol-flow__ribbons,
  .petrol-flow.is-visible .petrol-flow__arrow {
    animation: none;
    clip-path: none;
    opacity: 1;
  }
}