:root {
  color-scheme: light;
  --ink: #171428;
  --ink-soft: #575268;
  --paper: #fbfaff;
  --surface: #ffffff;
  --surface-soft: #f3effc;
  --line: #ded8ed;
  --violet: #6842c2;
  --violet-dark: #442389;
  --violet-pale: #ebe3fb;
  --aqua: #4b9e9a;
  --success: #2e7167;
  --shadow: 0 24px 70px rgba(42, 25, 82, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 3%, rgba(112, 73, 202, 0.11), transparent 28rem),
    var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: "";
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(93, 67, 151, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(93, 67, 151, 0.045) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--violet-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--violet);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(104, 66, 194, 0.34);
  outline-offset: 3px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 800px;
  margin-bottom: 1.4rem;
  font-size: clamp(2.7rem, 7vw, 5.65rem);
  font-weight: 720;
}

h2 {
  margin-bottom: 1.1rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
}

h3 {
  margin-bottom: 0.65rem;
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.018em;
}

p:last-child {
  margin-bottom: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 2.5rem), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(222, 216, 237, 0.82);
  background: rgba(251, 250, 255, 0.9);
  backdrop-filter: blur(18px);
}

.nav-shell {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-size: 1.12rem;
  font-weight: 750;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--violet), var(--violet-dark));
  box-shadow: 0 9px 22px rgba(68, 35, 137, 0.23);
  color: #fff;
  font-size: 0.86rem;
  letter-spacing: -0.08em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  padding: 0.62rem 0.8rem;
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 620;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--violet-pale);
  color: var(--violet-dark);
}

.nav-cta {
  margin-left: 0.45rem;
  background: var(--ink) !important;
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: currentColor;
  content: "";
}

.hero {
  display: grid;
  min-height: 700px;
  padding-block: clamp(5rem, 10vw, 8.5rem);
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.84fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 6.5rem);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 1.3rem;
  align-items: center;
  gap: 0.55rem;
  color: var(--violet-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
}

.hero-copy {
  max-width: 670px;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
}

.button-row {
  display: flex;
  margin-top: 2rem;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.button-row-center {
  justify-content: center;
}

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0.78rem 1.2rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border: 1px solid var(--ink);
  border-radius: 12px;
  background: var(--ink);
  color: #fff;
  font-weight: 720;
  text-decoration: none;
}

.button:hover {
  background: var(--violet-dark);
  color: #fff;
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--violet);
  background: var(--violet-pale);
  color: var(--violet-dark);
}

.system-card {
  position: relative;
  overflow: hidden;
  padding: 1rem;
  border: 1px solid rgba(222, 216, 237, 0.9);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
}

.system-card::after {
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: rgba(104, 66, 194, 0.12);
  content: "";
  filter: blur(3px);
}

.system-topbar {
  display: flex;
  padding: 0.6rem 0.65rem 0.9rem;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-soft);
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  color: var(--success);
}

.status::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  content: "";
}

.flow-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0.65rem;
}

.flow-item {
  display: grid;
  padding: 1rem;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(251, 250, 255, 0.92);
}

.flow-index {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  background: var(--violet-pale);
  color: var(--violet-dark);
  font-size: 0.8rem;
  font-weight: 800;
}

.flow-item strong,
.flow-item small {
  display: block;
}

.flow-item strong {
  font-size: 0.92rem;
}

.flow-item small {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.flow-state {
  color: var(--ink-soft);
  font-size: 0.75rem;
  font-weight: 700;
}

.section {
  padding-block: clamp(4.5rem, 9vw, 7.5rem);
}

.section-tight {
  padding-block: 3.8rem;
}

.section-muted {
  border-block: 1px solid var(--line);
  background: rgba(243, 239, 252, 0.65);
}

.section-head {
  display: grid;
  margin-bottom: 2.5rem;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: end;
  gap: 2rem;
}

.section-head h2 {
  max-width: 620px;
  margin-bottom: 0;
}

.section-head p {
  max-width: 590px;
  margin-bottom: 0.25rem;
  color: var(--ink-soft);
}

.intro-grid,
.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: clamp(2rem, 6vw, 6rem);
}

.intro-lead {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.42;
  letter-spacing: -0.025em;
}

.muted-copy {
  color: var(--ink-soft);
}

.steps {
  display: grid;
  gap: 1rem;
  counter-reset: steps;
}

.step {
  display: grid;
  padding: 1.3rem;
  grid-template-columns: 46px 1fr;
  gap: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  counter-increment: steps;
}

.step::before {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  content: "0" counter(steps);
  font-size: 0.76rem;
  font-weight: 800;
}

.step p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-height: 210px;
  padding: 1.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.88);
}

.card-number {
  display: inline-flex;
  margin-bottom: 2.5rem;
  color: var(--violet);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.card p {
  color: var(--ink-soft);
}

.control-panel {
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow);
}

.control-panel .eyebrow,
.control-panel p {
  color: #d7cee9;
}

.control-panel h2 {
  max-width: 720px;
}

.control-list {
  display: grid;
  margin: 2.4rem 0 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  list-style: none;
}

.control-list li {
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.use-case {
  padding: 1.5rem;
  border-left: 3px solid var(--violet);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(42, 25, 82, 0.06);
}

.use-case p {
  color: var(--ink-soft);
}

.trust-strip {
  display: grid;
  padding: 2rem;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.trust-points {
  display: grid;
  gap: 0.55rem;
}

.trust-points span {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink-soft);
}

.trust-points span::before {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--aqua);
  content: "";
}

.cta-panel {
  display: flex;
  padding: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(125deg, var(--violet-pale), #f8f5ff 70%);
}

.cta-panel h2 {
  max-width: 650px;
  margin-bottom: 0.65rem;
}

.page-hero {
  padding-block: clamp(5rem, 10vw, 8rem) clamp(3.5rem, 7vw, 5.5rem);
}

.page-hero h1 {
  max-width: 900px;
  font-size: clamp(2.7rem, 6vw, 4.9rem);
}

.page-hero p {
  max-width: 720px;
  color: var(--ink-soft);
  font-size: 1.18rem;
}

.prose-layout {
  display: grid;
  grid-template-columns: minmax(180px, 0.3fr) minmax(0, 0.7fr);
  align-items: start;
  gap: clamp(2rem, 7vw, 6rem);
}

.prose-aside {
  position: sticky;
  top: 108px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.prose-aside strong,
.prose-aside span {
  display: block;
}

.prose-aside span {
  margin-top: 0.35rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.prose {
  max-width: 760px;
}

.prose h2 {
  margin-top: 2.8rem;
  margin-bottom: 0.85rem;
  font-size: 1.7rem;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: 1.8rem;
}

.prose p,
.prose li {
  color: #4e495e;
}

.prose li + li {
  margin-top: 0.45rem;
}

.notice {
  margin-block: 2rem;
  padding: 1.2rem 1.3rem;
  border-left: 3px solid var(--violet);
  border-radius: 0 12px 12px 0;
  background: var(--violet-pale);
}

.identity-card,
.contact-card {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.identity-card dl,
.contact-card dl {
  display: grid;
  margin: 1.8rem 0 0;
  grid-template-columns: 150px 1fr;
  gap: 0.8rem 1.5rem;
}

.identity-card dt,
.contact-card dt {
  color: var(--ink-soft);
}

.identity-card dd,
.contact-card dd {
  margin: 0;
  font-weight: 700;
}

[aria-disabled="true"] {
  color: var(--ink-soft);
  cursor: not-allowed;
  text-decoration: none;
}

.site-footer {
  margin-top: 3rem;
  padding-block: 3.5rem 2.2rem;
  border-top: 1px solid var(--line);
  background: #f5f2fb;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 2.5rem;
}

.footer-brand p {
  max-width: 440px;
  margin-top: 1rem;
  color: var(--ink-soft);
}

.footer-links strong {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
}

.footer-links a {
  display: block;
  width: fit-content;
  margin-top: 0.45rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--violet-dark);
}

.footer-bottom {
  display: flex;
  margin-top: 2.8rem;
  padding-top: 1.35rem;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.footer-bottom p {
  max-width: 700px;
  margin-bottom: 0;
}

.not-found {
  display: grid;
  min-height: calc(100vh - 76px);
  padding-block: 5rem;
  place-items: center;
  text-align: center;
}

.not-found-inner {
  max-width: 660px;
}

.not-found-code {
  color: var(--violet);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    padding: 1rem max(1.25rem, calc((100% - var(--container)) / 2));
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 15px 28px rgba(42, 25, 82, 0.08);
  }

  .site-nav[data-open="true"] {
    display: grid;
  }

  .site-nav a {
    padding: 0.85rem;
  }

  .nav-cta {
    margin: 0.35rem 0 0;
    text-align: center;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .section-head,
  .intro-grid,
  .split-grid,
  .trust-strip,
  .prose-layout {
    grid-template-columns: 1fr;
  }

  .section-head {
    align-items: start;
  }

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

  .prose-aside {
    position: static;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 1.5rem), var(--container));
  }

  h1 {
    font-size: clamp(2.4rem, 13vw, 3.5rem);
  }

  .hero,
  .page-hero {
    padding-top: 4rem;
  }

  .flow-item {
    grid-template-columns: 40px 1fr;
  }

  .flow-state {
    display: none;
  }

  .card-grid,
  .control-list,
  .use-case-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: 0;
  }

  .card-number {
    margin-bottom: 1.6rem;
  }

  .cta-panel,
  .footer-bottom {
    align-items: stretch;
    flex-direction: column;
  }

  .identity-card dl,
  .contact-card dl {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .identity-card dd,
  .contact-card dd {
    margin-bottom: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}