:root {
  color-scheme: light;
  --ink: #0d1624;
  --muted: #536273;
  --paper: #ffffff;
  --soft: #f5f7fa;
  --line: #dfe8f0;
  --cyan: #39e0d0;
  --blue: #28a7ff;
  --accent-ink: #066b77;
  --accent-soft: #ecfffc;
  --warning-ink: #8a4b00;
  --warning-soft: #fff8e8;
  --warning-line: #f1d59b;
  --radius: 24px;
  --shadow: 0 18px 50px rgb(13 22 36 / 10%);
  --shadow-soft: 0 10px 30px rgb(13 22 36 / 8%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-width: 280px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% 0%, rgb(57 224 208 / 13%), transparent 29rem),
    linear-gradient(180deg, var(--paper) 0, var(--paper) 24rem, var(--soft) 44rem, var(--paper) 64rem);
}

a {
  color: var(--accent-ink);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #07545f;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgb(40 167 255 / 35%);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  color: #ffffff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-180%);
}

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

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgb(13 22 36 / 8%);
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(16px);
}

.header-inner,
.page,
.footer-inner {
  width: min(70rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 4.75rem;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand img {
  display: block;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 10px;
  filter: drop-shadow(0 6px 12px rgb(13 22 36 / 16%));
}

.nav {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
}

.nav a {
  flex: 0 0 auto;
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 650;
  text-decoration: none;
}

.nav a:hover {
  color: var(--ink);
  background: var(--soft);
}

.nav a[aria-current="page"] {
  color: #095c68;
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px rgb(57 224 208 / 42%);
}

.page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 18rem);
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-block: clamp(3.5rem, 7vw, 5.75rem);
}

.content,
.summary-card {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 0.85rem;
  color: #097b89;
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.08;
  text-wrap: balance;
}

h1 {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(2.55rem, 6vw, 4.75rem);
  letter-spacing: -0.065em;
}

h2 {
  margin: 3.25rem 0 0.9rem;
  padding-top: 0.2rem;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  letter-spacing: -0.04em;
  scroll-margin-top: 6rem;
}

h3 {
  margin: 1.8rem 0 0.55rem;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

p,
li {
  max-width: 72ch;
}

p,
ul,
ol {
  color: #314155;
}

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

.lead {
  max-width: 63ch;
  margin: 1.35rem 0 0;
  color: #344456;
  font-size: clamp(1.08rem, 1.7vw, 1.28rem);
  line-height: 1.5;
}

.meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.notice {
  position: relative;
  margin: 1.8rem 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid rgb(57 224 208 / 32%);
  border-radius: 20px;
  color: #314155;
  background: #f8fefd;
  box-shadow: 0 7px 24px rgb(13 22 36 / 5%);
}

.notice::before {
  position: absolute;
  top: 1.35rem;
  bottom: 1.35rem;
  left: -1px;
  width: 4px;
  border-radius: 99px;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
  content: "";
}

.notice.warning {
  border-color: var(--warning-line);
  color: var(--warning-ink);
  background: var(--warning-soft);
}

.notice.warning::before {
  background: #e9a940;
}

.summary-card {
  align-self: start;
  position: sticky;
  top: 6.25rem;
  overflow: hidden;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.summary-card::before {
  display: block;
  width: 3rem;
  height: 4px;
  margin-bottom: 1.3rem;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  content: "";
}

.summary-card h2 {
  margin-top: 0;
  padding-top: 0;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.summary-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.summary-card li::marker {
  color: #119caa;
}

code {
  padding: 0.18em 0.42em;
  border-radius: 8px;
  color: var(--accent-ink);
  background: var(--accent-soft);
  font: 700 0.9em ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  overflow-wrap: anywhere;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0 1.1rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  background: var(--paper);
  font-weight: 850;
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.button:hover {
  border-color: rgb(40 167 255 / 55%);
  color: var(--ink);
  box-shadow: 0 10px 22px rgb(40 167 255 / 10%);
  transform: translateY(-1px);
}

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

.button.primary:hover {
  color: #ffffff;
  box-shadow: 0 10px 22px rgb(13 22 36 / 18%);
}

.site-footer {
  border-top: 1px solid rgb(255 255 255 / 8%);
  color: #dce8f1;
  background: #08111c;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.75rem;
  color: #aebdcb;
  font-size: 0.9rem;
}

.footer-inner p {
  margin: 0;
  color: inherit;
}

.footer-inner a {
  color: #dce8f1;
  font-weight: 750;
  text-decoration: none;
}

.footer-inner a:hover {
  color: #ffffff;
  text-decoration: underline;
}

@media (max-width: 920px) {
  .header-inner {
    flex-wrap: wrap;
    padding-block: 0.85rem;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    padding-bottom: 0.15rem;
    overflow-x: auto;
  }

  .page {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 3rem;
  }

  .summary-card {
    position: static;
    grid-row: 1;
  }
}

@media (max-width: 640px) {
  .header-inner,
  .page,
  .footer-inner {
    width: min(100% - 1.75rem, 70rem);
  }

  h1 {
    font-size: clamp(2.45rem, 14vw, 4rem);
  }

  .nav a {
    padding: 0.5rem 0.65rem;
  }

  .summary-card {
    padding: 1.25rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  .button {
    transition: none;
  }
}