:root {
  --bg: #0b0d10;
  --panel: #111419;
  --panel-2: #161a20;
  --line: #282d35;
  --text: #e8ebef;
  --muted: #9da5b0;
  --soft: #c3c8cf;
  --accent: #d8dde5;
  --accent-dark: #252a31;
  --warning: #d7b982;
  --max-width: 980px;
  --sidebar-width: 290px;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 28px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

button,
input {
  font: inherit;
}

a {
  color: inherit;
}

.site-shell {
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: #0d1014;
  padding: 28px 20px 36px;
}

.brand {
  padding: 0 8px 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.brand a {
  display: block;
  text-decoration: none;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.search-label {
  display: block;
  margin: 0 8px 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.search {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 10px 11px;
  outline: none;
}

.search:focus {
  border-color: #4a515c;
  background: var(--panel-2);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 18px;
}

.nav a {
  border-radius: 7px;
  color: var(--muted);
  padding: 7px 9px;
  text-decoration: none;
  font-size: 13px;
}

.nav a:hover,
.nav a.active {
  background: var(--panel-2);
  color: var(--text);
}

.main {
  margin-left: var(--sidebar-width);
}

.mobile-topbar {
  display: none;
}

.content {
  width: min(calc(100% - 48px), var(--max-width));
  margin: 0 auto;
  padding: 64px 0 100px;
}

.doc-section {
  padding: 12px 0 58px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 44px;
}

.doc-section:last-of-type {
  border-bottom: 0;
  margin-bottom: 0;
}

.hero {
  padding-top: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

h1,
h2,
h3 {
  line-height: 1.22;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0 0 18px;
  max-width: 780px;
  font-size: clamp(38px, 6vw, 66px);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(27px, 4vw, 38px);
}

h3 {
  margin: 32px 0 10px;
  font-size: 20px;
}

p {
  margin: 0 0 17px;
  color: var(--soft);
}

.lead {
  max-width: 840px;
  font-size: 20px;
  line-height: 1.65;
}

.summary-grid,
.three-column,
.policy-grid {
  display: grid;
  gap: 14px;
  margin: 30px 0;
}

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

.three-column,
.policy-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.summary-card,
.three-column > div,
.policy-grid > div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 20px;
}

.summary-card h2,
.three-column h3,
.policy-grid strong {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--text);
}

.summary-card p,
.three-column p,
.policy-grid p {
  margin: 0;
  font-size: 14px;
}

.callout {
  margin: 28px 0;
  border: 1px solid #353b44;
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px 20px;
}

.callout.warning {
  border-left-color: var(--warning);
}

.callout strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
}

.callout p {
  margin: 0;
}

.flow,
.detail-list,
.mistake-list,
.reference-list {
  display: grid;
  gap: 10px;
  margin: 22px 0;
}

.flow > div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 14px 16px;
}

.flow span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--accent-dark);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.flow p {
  margin: 2px 0 0;
}

.detail-list > div,
.mistake-list > div {
  border-top: 1px solid var(--line);
  padding: 16px 0 0;
}

.detail-list strong {
  display: block;
  color: var(--text);
  margin-bottom: 4px;
}

.detail-list p,
.mistake-list p {
  margin-bottom: 8px;
}

.mistake-list h3 {
  margin: 0 0 5px;
  font-size: 17px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--panel-2);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

td {
  color: var(--soft);
  background: var(--panel);
  font-size: 14px;
}

tr:last-child th,
tr:last-child td {
  border-bottom: 0;
}

pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #080a0d;
  padding: 18px 20px;
  margin: 18px 0 24px;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
}

.reference-list a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 13px 15px;
  text-decoration: none;
}

.reference-list a:hover {
  background: var(--panel-2);
}

.review-date {
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

.no-results {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  padding: 18px;
}

.doc-section.filtered-out {
  display: none;
}

@media (max-width: 980px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 160ms ease;
    z-index: 20;
    box-shadow: 18px 0 40px rgba(0, 0, 0, 0.32);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    margin-left: 0;
  }

  .mobile-topbar {
    position: sticky;
    top: 0;
    z-index: 15;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 13, 16, 0.94);
    backdrop-filter: blur(12px);
    padding: 12px 18px;
    color: var(--soft);
    font-size: 14px;
  }

  .menu-button {
    border: 1px solid var(--line);
    border-radius: 7px;
    background: var(--panel);
    color: var(--text);
    padding: 7px 11px;
    cursor: pointer;
  }

  .content {
    padding-top: 38px;
  }
}

@media (max-width: 720px) {
  .content {
    width: min(calc(100% - 30px), var(--max-width));
  }

  .summary-grid,
  .three-column,
  .policy-grid {
    grid-template-columns: 1fr;
  }

  table {
    display: block;
    overflow-x: auto;
  }

  h1 {
    font-size: 40px;
  }

  .lead {
    font-size: 17px;
  }
}