:root {
  color-scheme: light;
  --ink: #1a1430;
  --ink-soft: #6b6390;
  --page: #f7f5fc;
  --page-deep: #f0ecf8;
  --line: rgba(74, 32, 91, 0.11);
  --line-strong: rgba(124, 111, 240, 0.26);
  --violet: #7c6ff0;
  --violet-strong: #5847c7;
  --lavender: #b5aaf7;
  --sky: #6fb1f0;
  --mint: #5ccbb4;
  --blush: #f38fb6;
  --shadow: rgba(74, 32, 91, 0.15);
}

.oneauth-site {
  background:
    radial-gradient(circle at 6% 8%, rgba(181, 170, 247, 0.28), transparent 28rem),
    radial-gradient(circle at 94% 10%, rgba(111, 177, 240, 0.2), transparent 30rem),
    radial-gradient(circle at 70% 48%, rgba(243, 143, 182, 0.14), transparent 32rem),
    linear-gradient(180deg, #fbfaff, var(--page-deep) 58%, #f9f7fd);
}

.oneauth-site .button.primary {
  border-color: #5847c7;
  background: linear-gradient(145deg, #8b7ff5, #5847c7);
  color: #ffffff;
  box-shadow: 0 16px 36px rgba(88, 71, 199, 0.28);
}

.oneauth-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  box-shadow: 0 9px 24px rgba(88, 71, 199, 0.22);
}

.oneauth-hero {
  grid-template-columns: minmax(0, 0.95fr) minmax(400px, 1.05fr);
}

.oneauth-hero h1 {
  max-width: 14ch;
  font-size: clamp(3.1rem, 4.4vw, 4.1rem);
  line-height: 0.98;
}

.oneauth-hero h1 span {
  color: #6d5ee2;
  padding-bottom: 0.08em;
}

.oneauth-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.oneauth-trust li {
  padding: 8px 12px;
  border: 1px solid rgba(124, 111, 240, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 720;
}

.oneauth-hero-art {
  min-height: min(74dvh, 720px);
  display: grid;
  align-content: center;
  justify-items: end;
  overflow: hidden;
}

.oneauth-hero-art::before {
  inset: 4% 0 7% 1%;
  border-radius: 44% 56% 52% 48% / 48% 42% 58% 52%;
  background:
    radial-gradient(circle at 35% 20%, rgba(181, 170, 247, 0.55), transparent 35%),
    radial-gradient(circle at 78% 68%, rgba(111, 177, 240, 0.42), transparent 38%),
    radial-gradient(circle at 50% 48%, rgba(243, 143, 182, 0.35), transparent 58%);
  filter: blur(34px);
}

.oneauth-hero-shot {
  position: relative;
  z-index: 1;
  width: min(100%, 400px);
  max-width: 100%;
  margin: 0;
  justify-self: end;
}

.oneauth-hero-shot img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(74, 32, 91, 0.16);
  border-radius: clamp(28px, 3vw, 42px);
  background: #24112f;
  box-shadow:
    0 36px 90px rgba(74, 32, 91, 0.2),
    0 10px 28px rgba(74, 32, 91, 0.1);
}

.oneauth-hero-shot figcaption {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-align: center;
}

.oneauth-facts {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.oneauth-screens .section-heading p {
  max-width: 58ch;
  margin: 18px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.oneauth-screenshot-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(12px, 1.8vw, 22px);
  margin-top: clamp(34px, 5vw, 68px);
  align-items: start;
}

.oneauth-shot {
  margin: 0;
}

.oneauth-shot:nth-child(even) {
  margin-top: 36px;
}

.oneauth-shot img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(74, 32, 91, 0.14);
  border-radius: clamp(20px, 2.4vw, 32px);
  background: #24112f;
  box-shadow:
    0 28px 64px rgba(74, 32, 91, 0.16),
    0 8px 18px rgba(74, 32, 91, 0.08);
}

.oneauth-shot figcaption {
  display: grid;
  gap: 6px;
  padding: 16px 4px 0;
}

.oneauth-shot figcaption strong {
  color: var(--ink);
  font-size: 0.9rem;
}

.oneauth-shot figcaption span {
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.5;
}

.oneauth-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4vw, 48px);
}

.oneauth-step {
  position: relative;
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 44px rgba(74, 32, 91, 0.08);
}

.oneauth-step.accent-blush {
  background:
    radial-gradient(circle at 90% 12%, rgba(243, 143, 182, 0.28), transparent 42%),
    rgba(255, 255, 255, 0.78);
}

.oneauth-step.accent-violet {
  background:
    radial-gradient(circle at 90% 12%, rgba(124, 111, 240, 0.26), transparent 42%),
    rgba(255, 255, 255, 0.78);
}

.oneauth-step.accent-mint {
  background:
    radial-gradient(circle at 90% 12%, rgba(92, 203, 180, 0.28), transparent 42%),
    rgba(255, 255, 255, 0.78);
}

.oneauth-step-index {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 24px rgba(74, 32, 91, 0.12);
  color: var(--violet-strong);
  font-weight: 820;
}

.oneauth-step h3 {
  margin: 22px 0 0;
  font-size: clamp(1.35rem, 2.2vw, 1.85rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.oneauth-step p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.55;
}

.oneauth-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(28px, 4vw, 48px);
}

.oneauth-feature {
  min-height: 180px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 16px 36px rgba(74, 32, 91, 0.07);
}

.oneauth-feature.accent-violet {
  background: linear-gradient(145deg, rgba(237, 233, 255, 0.92), rgba(255, 255, 255, 0.74));
}

.oneauth-feature.accent-sky {
  background: linear-gradient(145deg, rgba(230, 242, 252, 0.94), rgba(255, 255, 255, 0.74));
}

.oneauth-feature.accent-mint {
  background: linear-gradient(145deg, rgba(230, 247, 242, 0.94), rgba(255, 255, 255, 0.74));
}

.oneauth-feature.accent-blush {
  background: linear-gradient(145deg, rgba(253, 234, 242, 0.94), rgba(255, 255, 255, 0.74));
}

.oneauth-feature h3 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.oneauth-feature p {
  margin: 12px 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.55;
}

.oneauth-principles-section {
  padding-top: 36px;
}

.oneauth-principles {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(40px, 7vw, 100px);
  align-items: center;
  padding: clamp(34px, 5vw, 72px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-xl, 32px);
  background:
    radial-gradient(circle at 0 100%, rgba(111, 177, 240, 0.18), transparent 30rem),
    radial-gradient(circle at 100% 0, rgba(181, 170, 247, 0.22), transparent 28rem),
    rgba(255, 255, 255, 0.72);
  box-shadow: 0 34px 90px rgba(74, 32, 91, 0.1);
}

.oneauth-principles .principles-copy h2 {
  margin: 0;
  font-size: clamp(2.4rem, 4.8vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.06em;
}

.oneauth-principles .principles-copy p {
  max-width: 50ch;
  margin: 22px 0 0;
  color: var(--ink-soft);
  line-height: 1.65;
}

.oneauth-principles .principle-list {
  display: grid;
  gap: 12px;
}

.oneauth-principles .principle-list article {
  display: grid;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
}

.oneauth-principles .principle-list strong {
  font-size: 0.94rem;
}

.oneauth-principles .principle-list span {
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.5;
}

.oneauth-platforms {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(36px, 7vw, 90px);
  align-items: center;
}

.oneauth-platforms-copy h2 {
  margin: 0;
  font-size: clamp(2.4rem, 4.8vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.055em;
}

.oneauth-platforms-copy p {
  max-width: 48ch;
  margin: 18px 0 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.oneauth-platform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.oneauth-platform {
  display: grid;
  gap: 4px;
  min-height: 88px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  color: inherit;
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(74, 32, 91, 0.08);
  transition: transform 160ms ease, border-color 160ms ease;
}

a.oneauth-platform:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 111, 240, 0.35);
}

.oneauth-platform strong {
  font-size: 1rem;
}

.oneauth-platform span {
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 680;
}

.oneauth-platform.is-soon {
  opacity: 0.72;
}

.oneauth-finale {
  background:
    radial-gradient(circle at 8% 12%, rgba(181, 170, 247, 0.24), transparent 30rem),
    radial-gradient(circle at 90% 80%, rgba(111, 177, 240, 0.18), transparent 28rem),
    rgba(255, 255, 255, 0.76);
}

.oneauth-footer {
  border-top-color: var(--line);
}

.oneauth-docs-hero h1 {
  max-width: 14ch;
}

.oneauth-docs-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.oneauth-docs-card {
  min-height: 180px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 36px rgba(74, 32, 91, 0.08);
}

.oneauth-docs-card h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  letter-spacing: -0.04em;
}

.oneauth-docs-card p {
  margin: 14px 0 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .oneauth-screenshot-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .oneauth-hero,
  .oneauth-docs-hero {
    grid-template-columns: 1fr;
  }

  .oneauth-site .hero-art.oneauth-hero-art {
    width: min(100%, 400px);
    min-height: 0;
    margin: 0 auto;
    justify-items: center;
    overflow: hidden;
  }

  .oneauth-hero-shot {
    width: min(100%, 300px);
    justify-self: center;
  }

  .oneauth-hero-shot img {
    width: auto;
    max-width: 100%;
    max-height: min(58dvh, 560px);
    margin-inline: auto;
    object-fit: contain;
  }

  .oneauth-facts,
  .oneauth-steps,
  .oneauth-feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .oneauth-screenshot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .oneauth-principles,
  .oneauth-platforms,
  .oneauth-docs-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .oneauth-site .nav-inner {
    gap: 12px;
  }

  .oneauth-site .brand {
    gap: 9px;
    font-size: 0.9rem;
  }

  .oneauth-mark {
    width: 34px;
    height: 34px;
  }

  .oneauth-site .nav-links {
    gap: 0;
  }

  .oneauth-site .nav-download {
    min-height: 38px;
    padding: 0 13px;
    font-size: 0.76rem;
  }

  .oneauth-hero h1,
  .oneauth-docs-hero h1 {
    max-width: 100%;
    font-size: clamp(2.15rem, 9vw, 2.7rem);
    line-height: 1;
  }

  .oneauth-site .hero-art.oneauth-hero-art {
    width: min(100%, 280px);
  }

  .oneauth-hero-shot {
    width: min(72vw, 240px);
  }

  .oneauth-hero-shot img {
    max-height: min(48dvh, 420px);
  }

  .oneauth-facts,
  .oneauth-steps,
  .oneauth-feature-grid,
  .oneauth-platform-grid {
    grid-template-columns: 1fr;
  }

  .oneauth-screenshot-grid {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(230px, 78%);
    gap: 16px;
    margin-right: -18px;
    padding: 0 18px 22px 0;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scrollbar-width: thin;
  }

  .oneauth-shot,
  .oneauth-shot:nth-child(even) {
    margin-top: 0;
    scroll-snap-align: start;
  }

  .oneauth-principles {
    padding: 26px;
  }

  .oneauth-step {
    min-height: 0;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .oneauth-principles,
  .oneauth-feature,
  .oneauth-step,
  .oneauth-docs-card,
  .oneauth-platform {
    background: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}