/* Inner pages: ECU explainer, FAQ, about. */
.ph-hero { overflow: clip; padding: 140px 0 60px; background: radial-gradient(60% 80% at 80% 0%, rgba(6, 97, 236, .22), transparent 70%); }
.ph-hero h1 { font-style: italic; font-weight: 900; font-stretch: 72%; text-transform: uppercase; font-size: clamp(48px, 8.4vw, 120px); line-height: .9; margin-bottom: 22px; }
.ph-hero p.lead { font-size: clamp(18px, 1.6vw, 21px); color: var(--ink-2); max-width: 56ch; }
.prose { max-width: 62ch; color: var(--ink-2); }
.prose p { margin-bottom: 1em; }
.prose strong { color: var(--ink); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }

/* ECU diagram */
.ecu { position: relative; margin: 0; padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(180deg, var(--bg-2), var(--bg)); }
.ecu svg { width: 100%; height: auto; }
.ecu .lbl { fill: var(--ink-2); font: 600 13px "Saira"; letter-spacing: .06em; }
.ecu .lbl--h { fill: var(--cyan); font-size: 12px; letter-spacing: .18em; }
.ecu .box { fill: #0f1524; stroke: rgba(230, 232, 233, .14); }
.ecu .chip { fill: #101a30; stroke: var(--cyan); stroke-width: 2; }
.ecu .cell { fill: rgba(6, 172, 247, .12); }
.ecu .cell.hot { fill: rgba(245, 4, 10, .55); animation: hot 2.4s ease-in-out infinite; }
.ecu .wire { fill: none; stroke: rgba(230, 232, 233, .12); stroke-width: 2; }
.ecu .flow { fill: none; stroke: var(--cyan); stroke-width: 2.5; stroke-linecap: round; stroke-dasharray: 6 18; animation: flow 1.6s linear infinite; }
.ecu .flow--out { stroke: var(--red); }
@keyframes flow { to { stroke-dashoffset: -48; } }
@keyframes hot { 50% { fill: rgba(245, 4, 10, .9); } }
.ecu figcaption { margin-top: 8px; font-size: 13px; color: var(--ink-2); }

.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin-top: 30px; }
.tile { padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg-2); }
.tile h3 { font-style: italic; font-weight: 800; font-stretch: 85%; text-transform: uppercase; font-size: 22px; margin-bottom: 10px; }
.tile p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.tile__k { display: block; margin-bottom: 14px; font: italic 800 13px "Saira"; letter-spacing: .12em; color: var(--red); }
.stages3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 30px; }
.stage-c { position: relative; padding: 26px 22px; border-radius: 18px; border: 1px solid var(--line); background: var(--bg-2); overflow: hidden; }
.stage-c::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px; background: var(--grad); }
.stage-c:nth-child(3)::before { background: linear-gradient(90deg, var(--blue), var(--red)); }
.stage-c b { display: block; font: italic 900 40px/1 "Saira"; font-stretch: 78%; text-transform: uppercase; margin-bottom: 6px; }
.stage-c small { display: block; margin-bottom: 14px; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); }
.stage-c p { color: var(--ink-2); margin: 0 0 12px; }
.stage-c ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: 14.5px; }
.stage-c li::before { content: ""; display: inline-block; width: 8px; height: 2px; margin: 0 8px 4px 0; background: var(--red); }
.checks { display: grid; gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; max-width: 70ch; }
.checks li { position: relative; padding: 16px 18px 16px 52px; border: 1px solid var(--line); border-radius: 14px; background: var(--bg-2); color: var(--ink-2); }
.checks li b { display: block; color: var(--ink); margin-bottom: 2px; }
.checks li::before { content: ""; position: absolute; left: 18px; top: 19px; width: 18px; height: 10px; border-left: 3px solid var(--wa); border-bottom: 3px solid var(--wa); transform: rotate(-45deg); }

/* FAQ accordion */
.faq { margin-top: 28px; border-top: 1px solid var(--line); max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; padding: 14px 4px; cursor: pointer;
  font-style: italic; font-weight: 800; font-stretch: 88%; font-size: clamp(19px, 2vw, 23px); text-transform: uppercase; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line);
  font: 400 22px/1 "Saira"; font-style: normal; color: var(--cyan); transition: transform .3s var(--ease), background-color .3s; }
.faq details[open] summary::after { transform: rotate(45deg); background: rgba(6, 97, 236, .25); }
.faq summary:hover { color: #fff; }
.faq summary:focus-visible { outline-offset: -2px; }
.faq .ans { padding: 0 4px 20px; max-width: 68ch; color: var(--ink-2); }
.faq .ans p { margin: 0 0 .8em; }

/* About */
.about-photo { position: relative; margin: 0; border-radius: 22px; overflow: hidden; aspect-ratio: 4 / 5; }
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-photo figcaption { position: absolute; left: 12px; bottom: 10px; font-size: 12px; color: var(--ink); text-shadow: 0 1px 4px #000; opacity: .85; }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 34px; }
.fact { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--bg-2); }
.fact b { display: block; font: italic 900 34px/1 "Saira"; font-stretch: 78%; color: var(--ink); margin-bottom: 6px; }
.fact span { font-size: 13.5px; color: var(--ink-2); }
.tl { list-style: none; margin: 30px 0 0; padding: 0 0 0 28px; position: relative; max-width: 760px; }
.tl::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--grad); }
.tl li { position: relative; padding: 0 0 26px; }
.tl li::before { content: ""; position: absolute; left: -27px; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 2px solid var(--cyan); }
.tl time { display: block; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); margin-bottom: 2px; }
.tl b { display: block; font-size: 18px; color: var(--ink); }
.tl p { margin: 4px 0 0; color: var(--ink-2); font-size: 15px; }
.tl a { font-size: 14px; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.duo .about-photo { aspect-ratio: 4 / 5; }

@media (max-width: 600px) {
  .ecu { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .ecu svg { min-width: 540px; }
  .ecu figcaption::after { content: " Arraste para ver o diagrama inteiro."; }
  .duo { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .ph-hero { padding: 110px 0 40px; }
  .split, .stages3 { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) { .ecu .flow, .ecu .cell.hot { animation: none; } }