:root {
  --background: #f4f6fb;
  --surface: #ffffff;
  --surface-subtle: #eaf0ff;
  --text: #152033;
  --muted: #536078;
  --line: #d9e0ec;
  --primary: #2846a8;
  --primary-hover: #1d347d;
  --focus: #d97706;
  --shadow: 0 18px 48px rgb(32 50 85 / 10%);
  --radius-lg: 24px;
  --radius-md: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--background);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--background);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 5%, rgb(84 117 220 / 13%), transparent 30rem),
    var(--background);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  font-weight: 650;
  text-underline-offset: 0.2em;
}

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

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
  border-radius: 4px;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  transform: translateY(-180%);
  border-radius: 0.6rem;
  color: #ffffff;
  background: #111827;
}

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

.site-header {
  border-bottom: 1px solid rgb(217 224 236 / 80%);
  background: rgb(255 255 255 / 88%);
  backdrop-filter: blur(14px);
}

.site-header__inner,
.page-shell,
.site-footer__inner {
  width: min(100% - 2rem, 70rem);
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--primary);
}

.page-shell {
  padding-block: clamp(3.5rem, 9vw, 7rem);
}

.hero {
  max-width: 48rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  line-height: 1.22;
  text-wrap: balance;
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 5rem);
  letter-spacing: -0.055em;
}

h2 {
  margin: 0;
  font-size: clamp(1.45rem, 4vw, 2rem);
  letter-spacing: -0.025em;
}

h3 {
  margin: 0;
  font-size: 1.12rem;
}

.lede {
  max-width: 42rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
}

.section {
  margin-top: clamp(3rem, 7vw, 5rem);
}

.section-heading {
  margin-bottom: 1.25rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: 1rem;
}

.card {
  min-width: 0;
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

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

.app-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1.25rem;
}

.app-icon {
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 1.35rem;
  box-shadow: 0 10px 26px rgb(22 36 72 / 18%);
}

.app-card__copy p {
  margin: 0.45rem 0 0.8rem;
  color: var(--muted);
}

.app-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: clamp(1.25rem, 4vw, 2rem);
}

.app-hero .app-icon {
  width: clamp(6rem, 18vw, 9rem);
  height: clamp(6rem, 18vw, 9rem);
  border-radius: clamp(1.45rem, 4vw, 2.2rem);
}

.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  color: #ffffff;
  background: var(--primary);
  text-decoration: none;
}

.button:hover {
  color: #ffffff;
  background: var(--primary-hover);
}

.link-list {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 1.25rem 0 0;
  list-style: none;
}

.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  text-decoration: none;
}

.link-list a::after {
  content: "→";
  flex: 0 0 auto;
}

.breadcrumbs {
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumbs a {
  color: inherit;
}

.prose {
  max-width: 46rem;
}

.prose h2 {
  margin-top: 2.75rem;
}

.prose h3 {
  margin-top: 1.75rem;
}

.prose p,
.prose li {
  color: var(--muted);
}

.prose strong {
  color: var(--text);
}

.notice {
  margin: 1.5rem 0 0;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--surface-subtle);
}

.faq-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.faq-list summary {
  padding: 1rem 1.2rem;
  cursor: pointer;
  color: var(--text);
  font-weight: 750;
}

.faq-list details > div {
  padding: 0 1.2rem 1.2rem;
  color: var(--muted);
}

.faq-list p:last-child {
  margin-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 42rem) {
  .site-header__inner {
    min-height: 4rem;
  }

  .site-nav {
    gap: 0.75rem;
  }

  .page-shell {
    padding-block: 3rem;
  }

  .app-card,
  .app-hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .app-card .app-icon {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 1.1rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0e1522;
    --surface: #172235;
    --surface-subtle: #1c2b47;
    --text: #f3f6fb;
    --muted: #b7c1d3;
    --line: #34425b;
    --primary: #a9baff;
    --primary-hover: #cfdaff;
    --focus: #fbbf24;
    --shadow: 0 18px 48px rgb(0 0 0 / 24%);
  }

  .site-header {
    border-bottom-color: rgb(52 66 91 / 80%);
    background: rgb(14 21 34 / 88%);
  }

  .button,
  .button:hover {
    color: #10172a;
  }
}