.sign-in-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 720;
  letter-spacing: 0.16em;
}
.sign-in-brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}
.sign-in-step {
  margin: 0 0 18px;
  color: var(--brand-accent);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.14em;
}

.sign-in-help-page {
  min-height: 100vh;
  background:
    linear-gradient(90deg, var(--surface-1) 0 1px, transparent 1px) 0 0 / 72px 72px,
    var(--bg);
}
.sign-in-help-header {
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(22px, 5vw, 72px);
  background: color-mix(in oklch, var(--background) 96%, transparent);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
}
.sign-in-help-header .sign-in-brand {
  color: var(--text-primary);
  text-decoration: none;
}
.sign-in-help-layout {
  display: grid;
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: clamp(44px, 7vw, 92px) 0;
  grid-template-columns: minmax(210px, 0.34fr) minmax(0, 0.66fr);
  gap: clamp(40px, 7vw, 104px);
}
.sign-in-help-index {
  position: sticky;
  top: 104px;
  align-self: start;
  padding: 24px;
  color: var(--text-secondary);
  background: color-mix(in oklch, var(--surface-1) 92%, transparent);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 46px color-mix(in oklch, var(--foreground) 7%, transparent);
}
.sign-in-help-index > svg {
  color: var(--brand-accent);
}
.sign-in-help-index > p {
  margin: 14px 0 20px;
  line-height: 1.6;
}
.sign-in-help-index ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--border-subtle);
  list-style: none;
}
.sign-in-help-index a,
.sign-in-help-support a {
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 620;
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
}
.sign-in-help-article {
  padding: clamp(28px, 5vw, 64px);
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 70px color-mix(in oklch, var(--foreground) 8%, transparent);
}
.sign-in-help-article > h1,
.sign-in-help-error h1 {
  margin: 0;
  color: var(--text-primary);
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 610;
  letter-spacing: -0.05em;
  line-height: 1;
}
.sign-in-help-description {
  margin: 22px 0 42px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.7;
}
.sign-in-recovery-notice {
  display: grid;
  gap: 8px;
  margin: 0 0 32px;
  padding: 16px 18px;
  color: var(--status-danger);
  background: var(--status-danger-soft);
  border: 1px solid color-mix(in oklch, var(--status-danger) 34%, var(--border-subtle));
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.55;
}
.sign-in-recovery-notice strong,
.sign-in-recovery-notice span {
  display: block;
}
.sign-in-recovery-notice a {
  width: fit-content;
  color: inherit;
  font-weight: 650;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.sign-in-help-support {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 48px;
  padding-top: 24px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  line-height: 1.6;
}
.sign-in-help-support svg {
  color: var(--brand-accent);
}
.sign-in-help-page.is-error {
  display: grid;
  place-items: center;
  padding: 24px;
}
.sign-in-help-error {
  width: min(620px, 100%);
  padding: clamp(30px, 6vw, 64px);
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}
.sign-in-help-error > p:not(.sign-in-step) {
  color: var(--text-secondary);
  line-height: 1.7;
}
.sign-in-help-error > div {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
@media (max-width: 820px) {
  .sign-in-help-layout {
    grid-template-columns: 1fr;
  }
  .sign-in-help-index {
    position: static;
  }
}
@media (max-width: 520px) {
  .sign-in-help-header {
    align-items: flex-start;
    flex-direction: column;
  }
  .sign-in-help-layout {
    width: min(100% - 28px, 1180px);
    padding: 28px 0;
    gap: 20px;
  }
  .sign-in-help-article,
  .sign-in-help-index {
    padding: 22px;
  }
}