:root {
  --platinum: #e7ecef;
  --dusk-blue: #274c77;
  --steel-blue: #6096ba;
  --icy-blue: #a3cef1;
  --grey-olive: #8b8c89;
  --bg: #f8fafc;
  --text: #1f2a37;
  --muted: #4a5565;
  --ring: rgba(96, 150, 186, 0.35);
  --radius: 14px;
  --shadow: 0 14px 40px rgba(39, 76, 119, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(circle at 10% 0%, #f4f8fb 0%, var(--bg) 45%, #eef3f8 100%);
}

a {
  color: var(--dusk-blue);
}

a:hover {
  color: #1f3a5c;
}

.container {
  width: min(1320px, 94vw);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.visually-hidden {
  border: 0;
  clip: rect(0 0 0 0);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  z-index: 1000;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  backdrop-filter: blur(10px);
  background: rgba(248, 250, 252, 0.78);
  border-bottom: 1px solid rgba(39, 76, 119, 0.12);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 74px;
  gap: 1rem;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(140deg, var(--dusk-blue), var(--steel-blue));
  color: #fff;
  box-shadow: 0 8px 18px rgba(39, 76, 119, 0.35);
}

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

.site-nav a {
  text-decoration: none;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  border-color: rgba(39, 76, 119, 0.2);
  background: #fff;
  transform: translateY(-1px);
}

.hero {
  padding: 5.5rem 0 3.2rem;
}

.hero-inner {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  background: linear-gradient(120deg, var(--dusk-blue) 0%, #305d90 45%, var(--steel-blue) 100%);
  color: #fff;
  padding: clamp(2rem, 3.8vw, 4rem);
  box-shadow: var(--shadow);
}

.hero-inner::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 999px;
  background: radial-gradient(circle at center, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0));
  right: -80px;
  top: -80px;
}

.eyebrow {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 0.9rem;
  max-width: 16ch;
}

.hero .lead {
  max-width: 60ch;
  font-size: 1.04rem;
  color: rgba(255, 255, 255, 0.92);
}

.hero-cta {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border-radius: 11px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #17314f;
  background: linear-gradient(120deg, #f0f8ff, #d3ebff);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
}

.btn-ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.1);
}

.section {
  padding: 1.4rem 0 2rem;
}

.section h2 {
  margin: 0 0 1.1rem;
  color: #1f3a5c;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid rgba(39, 76, 119, 0.14);
  box-shadow: 0 8px 22px rgba(39, 76, 119, 0.08);
  padding: 1rem;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(39, 76, 119, 0.28);
  box-shadow: 0 15px 30px rgba(39, 76, 119, 0.2);
}

.card svg {
  width: 38px;
  height: 38px;
}

.card h3 {
  margin: 0.6rem 0 0.45rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.link-grid {
  display: grid;
  gap: 0.8rem;
}

.link-grid a {
  background: #fff;
  border: 1px solid rgba(39, 76, 119, 0.12);
  border-radius: 11px;
  padding: 0.75rem 0.9rem;
  text-decoration: none;
  transition: all 170ms ease;
}

.link-grid a:hover {
  border-color: rgba(39, 76, 119, 0.28);
  box-shadow: 0 8px 22px rgba(39, 76, 119, 0.14);
  transform: translateX(2px);
}

.doc-page {
  padding-top: 1rem;
  padding-bottom: 3rem;
}

.breadcrumb {
  padding-top: 1.1rem;
  font-size: 0.92rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb a {
  text-decoration: none;
  color: var(--dusk-blue);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: #7f8ea0;
}

.prose {
  background: #fff;
  border: 1px solid rgba(39, 76, 119, 0.12);
  box-shadow: 0 12px 24px rgba(39, 76, 119, 0.08);
  border-radius: 18px;
  padding: clamp(1rem, 3vw, 2rem);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  color: #1e3859;
  line-height: 1.25;
}

.prose h1 {
  margin-top: 0;
  margin-bottom: 1.1rem;
  padding: 0 0 0.7rem;
  font-size: clamp(1.75rem, 2.9vw, 2.35rem);
  letter-spacing: -0.01em;
  border-bottom: 1px solid rgba(39, 76, 119, 0.2);
}

.prose h2,
.prose h3 {
  position: relative;
  margin-top: 1.8rem;
  padding-left: 0.75rem;
}

.prose h2::before,
.prose h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.12em;
  bottom: 0.12em;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--steel-blue), var(--icy-blue));
}

.prose h2 {
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
}

.prose h3 {
  font-size: clamp(1.12rem, 1.8vw, 1.35rem);
}

.code-block {
  position: relative;
  margin: 1rem 0;
}

.prose pre[class*="language-"] {
  margin: 0;
  background: linear-gradient(180deg, #10233b 0%, #0d1e34 100%);
  color: #e8f0ff;
  border: 1px solid rgba(163, 206, 241, 0.26);
  border-radius: 12px;
  padding: 1.1rem;
  overflow-x: auto;
}

.prose pre:not([class*="language-"]) {
  background: linear-gradient(180deg, #10233b 0%, #0d1e34 100%);
  color: #e8f0ff;
  border: 1px solid rgba(163, 206, 241, 0.26);
  border-radius: 12px;
  padding: 1.1rem;
  overflow-x: auto;
}

.prose :not(pre) > code {
  background: rgba(39, 76, 119, 0.11);
  color: #1e3859;
  border: 1px solid rgba(39, 76, 119, 0.18);
  border-radius: 6px;
  padding: 0.1rem 0.35rem;
}

.copy-code-button {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  border: 1px solid rgba(163, 206, 241, 0.5);
  background: rgba(22, 40, 66, 0.92);
  color: #f6fbff;
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.55rem;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease;
}

.copy-code-button:hover {
  transform: translateY(-1px);
  border-color: #d3ebff;
}

.copy-code-button:focus-visible {
  outline: 2px solid var(--icy-blue);
  outline-offset: 1px;
}

.prose .token.comment,
.prose .token.prolog,
.prose .token.doctype,
.prose .token.cdata {
  color: #8ea4c3;
}

.prose .token.punctuation {
  color: #d9e5fb;
}

.prose .token.property,
.prose .token.tag,
.prose .token.boolean,
.prose .token.number,
.prose .token.constant,
.prose .token.symbol,
.prose .token.deleted {
  color: #f78ba7;
}

.prose .token.selector,
.prose .token.attr-name,
.prose .token.string,
.prose .token.char,
.prose .token.builtin,
.prose .token.inserted {
  color: #9fe8bd;
}

.prose .token.operator,
.prose .token.entity,
.prose .token.url,
.prose .language-css .token.string,
.prose .style .token.string {
  color: #9cd8ff;
}

.prose .token.atrule,
.prose .token.attr-value,
.prose .token.keyword {
  color: #ffd48a;
}

.prose .token.function,
.prose .token.class-name {
  color: #9fc6ff;
}

.prose .token.regex,
.prose .token.important,
.prose .token.variable {
  color: #ffb99b;
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.prose table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.95rem;
  display: table;
  margin: 1rem 0;
  border: 1px solid rgba(39, 76, 119, 0.18);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}

.prose th,
.prose td {
  border-bottom: 1px solid rgba(39, 76, 119, 0.14);
  border-right: 1px solid rgba(39, 76, 119, 0.14);
  padding: 0.6rem;
  text-align: left;
  vertical-align: top;
}

.prose tr:last-child td {
  border-bottom: 0;
}

.prose th:last-child,
.prose td:last-child {
  border-right: 0;
}

.prose thead th {
  background: linear-gradient(180deg, #f2f7fd 0%, #eaf2fa 100%);
  color: #1f3a5c;
  font-weight: 700;
}

.prose tbody tr:nth-child(even) {
  background: rgba(163, 206, 241, 0.12);
}

.prose ul.contains-task-list {
  list-style: none;
  padding-left: 0;
}

.prose li.task-list-item {
  display: block;
  position: relative;
  margin: 0.55rem 0;
  padding: 0.58rem 0.75rem 0.58rem 2.2rem;
  border: 1px solid rgba(39, 76, 119, 0.14);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #f9fcff 100%);
  transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.prose li.task-list-item:hover {
  border-color: rgba(39, 76, 119, 0.25);
  box-shadow: 0 6px 16px rgba(39, 76, 119, 0.08);
}

.prose li.task-list-item input[type="checkbox"] {
  appearance: none;
  width: 1.12rem;
  height: 1.12rem;
  min-width: 1.12rem;
  margin-top: 0;
  border-radius: 5px;
  border: 1px solid rgba(39, 76, 119, 0.5);
  background: #fff;
  cursor: pointer;
  position: absolute;
  left: 0.72rem;
  top: 0.68rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.8);
  transition: background 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.prose li.task-list-item input[type="checkbox"]:checked {
  background: linear-gradient(180deg, var(--steel-blue) 0%, var(--dusk-blue) 100%);
  border-color: var(--dusk-blue);
  box-shadow: 0 0 0 2px rgba(96, 150, 186, 0.2);
}

.prose li.task-list-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 0.33rem;
  top: 0.12rem;
  width: 0.24rem;
  height: 0.5rem;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.prose li.task-list-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--icy-blue);
  outline-offset: 2px;
}

.prose li.task-list-item:has(input[type="checkbox"]:checked) {
  background: linear-gradient(180deg, #f4f9ff 0%, #eef6ff 100%);
  border-color: rgba(39, 76, 119, 0.22);
}

.prose li.task-list-item:has(input[type="checkbox"]:checked) {
  color: #54657a;
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  text-decoration-color: rgba(84, 101, 122, 0.45);
}

.prose li.task-list-item code {
  background: none;
  border: 0;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  padding: 0;
}

.prose blockquote {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--steel-blue);
  color: var(--muted);
}

.heading-anchor {
  text-decoration: none;
  margin-left: 0;
  opacity: 1;
  color: inherit;
}

.prose h1:hover .heading-anchor,
.prose h2:hover .heading-anchor,
.prose h3:hover .heading-anchor,
.prose h4:hover .heading-anchor {
  opacity: 1;
}

.site-footer {
  padding: 2.3rem 0;
  color: #334155;
}

@media (max-width: 700px) {
  .site-nav {
    gap: 0.4rem;
  }

  .site-nav a {
    padding: 0.35rem 0.55rem;
    font-size: 0.92rem;
  }
}