.page-faq {
  --faq-line: rgba(232, 237, 245, 0.16);
  --faq-line-soft: rgba(232, 237, 245, 0.07);
  --faq-panel: rgba(18, 26, 58, 0.92);
  --faq-panel-soft: rgba(18, 26, 58, 0.66);
  background: var(--ink);
  color: var(--silver);
  overflow-x: clip;
}

.page-faq h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.06;
  font-size: clamp(26px, 4.4vw, 42px);
  margin: 0.35em 0 0.5em;
}

.page-faq h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-faq p {
  margin: 0 0 14px;
  line-height: 1.75;
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 224, 232, 0.35);
}

.page-faq a:hover,
.page-faq a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq :focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- hero ---------- */
.page-faq .tut-hero {
  padding: clamp(16px, 3vw, 28px) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(920px 440px at 84% -12%, rgba(139, 92, 246, 0.2), transparent 62%),
    radial-gradient(680px 360px at 2% 4%, rgba(61, 224, 232, 0.13), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .tut-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .tut-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 74px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 10px 0 18px;
  text-wrap: balance;
}

.page-faq .tut-hero__lede {
  color: var(--silver-dim);
  font-size: 16px;
  max-width: 60ch;
}

.page-faq .tut-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .tut-hero__aside {
  border-left: 1px solid var(--faq-line);
  padding-left: clamp(16px, 3vw, 26px);
}

.page-faq .tut-hero__aside-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver-dim);
  margin-bottom: 16px;
}

.page-faq .tut-facts {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
}

.page-faq .tut-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-top: 1px solid var(--faq-line);
  padding-top: 10px;
}

.page-faq .tut-facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .tut-facts li span:last-child {
  font-size: 13px;
  color: var(--silver-dim);
}

.page-faq .tut-hero__aside-note {
  font-size: 13px;
  color: var(--silver-dim);
  margin: 0;
}

.page-faq .tut-hero__figure {
  margin-top: clamp(28px, 5vw, 48px);
}

.page-faq .tut-hero__figure img,
.page-faq .tut-library__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- steps ---------- */
.page-faq .tut-steps-section {
  padding: clamp(40px, 6vw, 84px) 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .tut-steps-layout {
  display: grid;
  gap: clamp(26px, 4vw, 42px);
  align-items: start;
}

.page-faq .tut-toc {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-l);
  background: var(--faq-panel-soft);
  padding: 20px 20px 18px;
}

.page-faq .tut-toc__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember);
  margin: 0 0 14px;
}

.page-faq .tut-toc__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .tut-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  border-radius: var(--radius-s);
  border-bottom: 1px solid var(--faq-line-soft);
  color: var(--silver);
  font-size: 15px;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-faq .tut-toc__list a:hover,
.page-faq .tut-toc__list a:focus-visible {
  background: rgba(61, 224, 232, 0.1);
  color: var(--cyan);
}

.page-faq .tut-toc__list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ember);
  flex: none;
}

.page-faq .tut-toc__hint {
  font-size: 13px;
  color: var(--silver-dim);
  margin: 0;
  border-top: 1px solid var(--faq-line-soft);
  padding-top: 12px;
}

.page-faq .tut-section-head p:last-child {
  color: var(--silver-dim);
  max-width: 62ch;
}

.page-faq .tut-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-faq .tut-step {
  position: relative;
  padding-left: 52px;
  padding-bottom: 20px;
}

.page-faq .tut-step:last-child {
  padding-bottom: 0;
}

.page-faq .tut-step::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 44px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--track), var(--faq-line-soft));
}

.page-faq .tut-step:last-child::before {
  display: none;
}

.page-faq .tut-step__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-s);
  border: 1px solid rgba(61, 224, 232, 0.6);
  background: var(--ink-2);
  color: var(--ember);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 0 0 4px rgba(61, 224, 232, 0.06);
}

.page-faq .tut-step__body {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: linear-gradient(158deg, rgba(18, 26, 58, 0.95), rgba(11, 16, 38, 0.9));
  padding: 16px 18px 14px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-faq .tut-step:hover .tut-step__body {
  border-color: rgba(61, 224, 232, 0.45);
  transform: translateX(2px);
}

.page-faq .tut-step__body p {
  color: var(--silver-dim);
  font-size: 15px;
  margin-bottom: 12px;
}

.page-faq .tut-step__meta {
  margin: 0;
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--faq-line-soft);
  padding-top: 12px;
}

.page-faq .tut-step__meta div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .tut-step__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

.page-faq .tut-step__meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--silver);
}

.page-faq .tut-step__meta dd.mono {
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- library (paper) ---------- */
.page-faq .tut-library {
  background: var(--paper);
  color: var(--ink);
  padding: clamp(40px, 6vw, 88px) 0;
}

.page-faq .tut-library .eyebrow {
  color: rgba(11, 16, 38, 0.6);
}

.page-faq .tut-library h2,
.page-faq .tut-library h3 {
  color: var(--ink);
}

.page-faq .tut-library a {
  color: #0b6b73;
  border-bottom-color: rgba(11, 107, 115, 0.4);
}

.page-faq .tut-library__head p:last-child {
  max-width: 66ch;
  color: rgba(11, 16, 38, 0.76);
}

.page-faq .tut-library__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(22px, 4vw, 36px);
  align-items: start;
}

.page-faq .tut-library__figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
}

.page-faq .tut-chapters {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px solid rgba(11, 16, 38, 0.16);
}

.page-faq .tut-chapter {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 4px;
  border-bottom: 1px solid rgba(11, 16, 38, 0.14);
  transition: background 0.2s ease;
}

.page-faq .tut-chapter:hover {
  background: rgba(61, 224, 232, 0.1);
}

.page-faq .tut-chapter__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #b3392f;
  padding-top: 4px;
}

.page-faq .tut-chapter h3 {
  margin-bottom: 4px;
  font-size: 17px;
}

.page-faq .tut-chapter p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(11, 16, 38, 0.74);
}

.page-faq .tut-library__strip {
  margin-top: clamp(22px, 4vw, 34px);
  display: grid;
  gap: 10px;
  border-left: 3px solid var(--ember);
  padding-left: 14px;
}

.page-faq .tut-library__strip p {
  margin: 0;
  font-size: 14px;
  color: rgba(11, 16, 38, 0.78);
}

.page-faq .tut-library__strip .mono {
  font-family: var(--font-mono);
  font-weight: 600;
  color: #b3392f;
}

/* ---------- faq accordion ---------- */
.page-faq .tut-faq-section {
  padding: clamp(40px, 6vw, 84px) 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .tut-faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .tut-faq-head p:last-child {
  color: var(--silver-dim);
  max-width: 46ch;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: var(--faq-panel-soft);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item:hover {
  border-color: rgba(61, 224, 232, 0.34);
}

.page-faq .faq-item[open] {
  border-color: rgba(61, 224, 232, 0.5);
  background: var(--faq-panel);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--silver);
}

.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--radius-m);
}

.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ember);
  flex: none;
}

.page-faq .faq-item__sign {
  position: relative;
  margin-left: auto;
  flex: none;
  width: 22px;
  height: 22px;
  border: 1px solid var(--track);
  border-radius: var(--radius-pill);
  align-self: center;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1.5px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__sign::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item__body {
  padding: 0 18px 16px 46px;
  border-top: 1px solid var(--faq-line-soft);
  margin-top: 2px;
  padding-top: 12px;
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 15px;
  color: var(--silver-dim);
}

/* ---------- updates ---------- */
.page-faq .tut-updates {
  padding: clamp(40px, 6vw, 84px) 0;
  background:
    linear-gradient(180deg, rgba(31, 77, 59, 0.22), transparent 70%),
    var(--ink-2);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .tut-updates__head p:last-child {
  color: var(--silver-dim);
  max-width: 60ch;
}

.page-faq .tut-updates__grid {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .tut-update {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: rgba(11, 16, 38, 0.6);
  padding: 18px 18px 16px;
  border-top: 2px solid var(--gold);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-faq .tut-update:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-faq .tut-update:nth-child(3) {
  border-top-color: var(--arcade-a);
}

.page-faq .tut-update:hover {
  transform: translateY(-2px);
  border-color: rgba(232, 237, 245, 0.3);
}

.page-faq .tut-update__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--silver-dim);
  margin: 0 0 10px;
}

.page-faq .tut-update h3 {
  margin-bottom: 8px;
}

.page-faq .tut-update p:last-child {
  margin: 0;
  font-size: 14px;
  color: var(--silver-dim);
  line-height: 1.7;
}

/* ---------- help ---------- */
.page-faq .tut-help {
  padding: clamp(40px, 6vw, 88px) 0;
  background:
    radial-gradient(720px 320px at 12% 0%, rgba(61, 224, 232, 0.14), transparent 60%),
    var(--ink);
}

.page-faq .tut-help__panel {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  border: 1px solid rgba(61, 224, 232, 0.28);
  border-radius: var(--radius-l);
  background: var(--faq-panel);
  padding: clamp(22px, 4vw, 40px);
}

.page-faq .tut-help__copy p {
  color: var(--silver-dim);
  max-width: 48ch;
}

.page-faq .tut-help__copy .btn {
  margin-top: 6px;
}

.page-faq .tut-help__checklist {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .tut-help__checklist li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  color: var(--silver);
  border-bottom: 1px solid var(--faq-line-soft);
  padding-bottom: 8px;
}

.page-faq .tut-help__checklist .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ember);
  flex: none;
}

.page-faq .tut-help__contact {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-faq .tut-help__contact div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .tut-help__contact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--silver-dim);
}

.page-faq .tut-help__contact dd {
  margin: 0;
  font-size: 15px;
  color: var(--silver);
}

.page-faq .tut-help__contact dd.mono {
  font-family: var(--font-mono);
  color: var(--cyan);
  word-break: break-word;
}

.page-faq .tut-help__more {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--silver-dim);
}

@media (min-width: 720px) {
  .page-faq .tut-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
    align-items: end;
  }

  .page-faq .tut-step__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .tut-updates__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .tut-help__panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  }
}

@media (min-width: 980px) {
  .page-faq .tut-steps-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .tut-toc {
    position: sticky;
    top: 104px;
  }

  .page-faq .tut-step:nth-child(even) {
    margin-left: 22px;
  }

  .page-faq .tut-library__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-faq .tut-library__figure {
    position: sticky;
    top: 104px;
  }

  .page-faq .tut-faq-layout {
    grid-template-columns: minmax(0, 0.62fr) minmax(0, 1fr);
  }

  .page-faq .tut-faq-head {
    position: sticky;
    top: 104px;
  }

  .page-faq .tut-hero__figure img {
    max-height: 460px;
  }

  .page-faq .tut-library__figure img {
    max-height: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tut-step__body,
  .page-faq .faq-item__sign::after,
  .page-faq .tut-update,
  .page-faq .tut-toc__list a {
    transition: none;
  }

  .page-faq .tut-step:hover .tut-step__body,
  .page-faq .tut-update:hover {
    transform: none;
  }
}