.faq-hero {
  position: relative;
  border-bottom: 1px solid var(--color-border);
}

.faq-hero::before {
  position: absolute;
  top: 12%;
  right: -18%;
  width: 58%;
  height: 72%;
  content: "";
  pointer-events: none;
  background:
    repeating-linear-gradient(
      90deg,
      var(--color-accent-soft) 0,
      var(--color-accent-soft) 1px,
      var(--color-transparent) 1px,
      var(--color-transparent) 24px
    );
  opacity: 0.45;
  transform: skewX(-10deg);
}

.faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(350px, 0.65fr);
  align-items: center;
  gap: clamp(36px, 7vw, 92px);
}

.faq-heading {
  min-width: 0;
}

.faq-heading h1 {
  max-width: 850px;
}

.faq-heading .lead {
  margin-bottom: 26px;
}

.diagnostic-console {
  position: relative;
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-bottom-width: 7px;
  border-radius: var(--radius-xs);
  background:
    linear-gradient(90deg, var(--color-text-faint) 1px, var(--color-transparent) 1px),
    var(--color-bg-panel);
  background-size: 22px 100%;
  box-shadow:
    inset 10px 12px 24px var(--color-shadow),
    14px 17px 0 var(--color-black-soft);
}

.diagnostic-console::before,
.diagnostic-console::after {
  position: absolute;
  top: 10px;
  width: 7px;
  height: 7px;
  content: "";
  border: 1px solid var(--color-text-muted);
  border-radius: 50%;
  background: var(--color-bg);
}

.diagnostic-console::before {
  left: 10px;
}

.diagnostic-console::after {
  right: 10px;
}

.signal-path {
  display: grid;
  gap: 0;
  margin: 8px 0 24px;
  padding: 0;
  list-style: none;
}

.signal-path li {
  position: relative;
  min-width: 0;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--color-border);
}

.signal-path li:last-child {
  border-bottom: 1px solid var(--color-border);
}

.signal-path li:not(:last-child)::after {
  position: absolute;
  bottom: -8px;
  left: 19px;
  z-index: 1;
  width: 1px;
  height: 16px;
  content: "";
  background: var(--color-accent);
}

.signal-path p {
  margin: 4px 0 0;
  font-size: 0.9rem;
}

.signal-index {
  width: 39px;
  height: 39px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  color: var(--color-accent);
  background: var(--color-bg-panel-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.signal-path li:first-child .signal-index {
  border-color: var(--color-error);
  color: var(--color-text);
  background: var(--color-error-soft);
}

.console-note {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.console-note span {
  position: relative;
  flex: 1;
  padding-top: 13px;
  text-align: center;
}

.console-note span::before {
  position: absolute;
  top: 0;
  right: 3px;
  left: 3px;
  height: 5px;
  content: "";
  background: repeating-linear-gradient(
    90deg,
    var(--color-border) 0,
    var(--color-border) 1px,
    var(--color-transparent) 1px,
    var(--color-transparent) 7px
  );
}

.faq-toc {
  top: 8px;
}

.faq-sections {
  display: grid;
  gap: clamp(58px, 8vw, 98px);
}

.faq-section {
  scroll-margin-top: 28px;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 68px);
  padding-top: 34px;
  padding-bottom: 34px;
  border-top: 1px solid var(--color-border);
}

.faq-category-head {
  position: relative;
  min-width: 0;
  align-self: start;
  padding: 24px 22px 26px;
  border-left: 5px solid var(--color-error);
  background:
    repeating-linear-gradient(
      0deg,
      var(--color-transparent) 0,
      var(--color-transparent) 27px,
      var(--color-text-faint) 28px
    ),
    var(--color-bg-panel-2);
  box-shadow: inset 8px 0 18px var(--color-shadow);
}

.faq-category-head::after {
  position: absolute;
  right: 14px;
  bottom: 13px;
  width: 42px;
  border-top: 2px solid var(--color-accent);
  content: "";
}

.faq-category-head h2 {
  margin-bottom: 22px;
  font-size: clamp(29px, 3.5vw, 43px);
}

.faq-category-head > p {
  margin-bottom: 0;
}

.faq-section .faq-list {
  min-width: 0;
}

.faq-section .faq-item {
  transition:
    border-color 0.22s var(--ease-machine),
    background-color 0.22s var(--ease-machine);
}

.faq-section .faq-item[open] {
  border-color: var(--color-accent-dark);
  background: linear-gradient(90deg, var(--color-accent-soft), var(--color-bg-panel));
}

.faq-section .faq-item[open] summary {
  color: var(--color-accent);
}

.faq-section .faq-answer p {
  color: var(--color-text-muted);
  line-height: 1.85;
}

.faq-final-note {
  margin-top: 0;
}

.faq-final-note .button-row {
  margin-top: 20px;
}

@media (max-width: 940px) {
  .faq-hero-grid,
  .faq-section {
    grid-template-columns: minmax(0, 1fr);
  }

  .diagnostic-console {
    max-width: 680px;
  }

  .faq-category-head {
    display: grid;
    grid-template-columns: minmax(210px, 0.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 24px;
  }

  .faq-category-head h2 {
    margin-bottom: 0;
  }
}

@media (max-width: 640px) {
  .faq-hero::before {
    top: 30%;
    right: -45%;
    width: 100%;
    height: 58%;
  }

  .diagnostic-console {
    padding: 25px 17px 20px;
    box-shadow:
      inset 8px 9px 18px var(--color-shadow),
      7px 9px 0 var(--color-black-soft);
  }

  .faq-toc {
    top: 4px;
  }

  .faq-section {
    gap: 22px;
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .faq-category-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
    padding: 21px 17px 25px;
  }

  .faq-category-head h2 {
    margin-bottom: 4px;
  }

  .faq-section .faq-item summary {
    padding-right: 45px;
  }

  .console-note {
    font-size: 0.55rem;
  }
}