:root {
  --bg-main: #060914;
  --bg-panel: rgba(12, 22, 38, 0.9);
  --bg-panel-strong: rgba(15, 27, 46, 0.95);
  --bg-soft: rgba(8, 16, 28, 0.82);
  --line: #295176;
  --line-soft: rgba(61, 240, 255, 0.14);
  --line-bright: #3df0ff;
  --text-main: #ddf6ff;
  --text-soft: #9ec6d7;
  --text-muted: #7ea1af;
  --accent: #63ffd0;
  --accent-warm: #ffc857;
  --shadow: inset 0 0 0 1px rgba(61, 240, 255, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --page-width: 1140px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text-main);
  background:
    radial-gradient(circle at 12% 12%, rgba(19, 51, 87, 0.7) 0%, transparent 34%),
    radial-gradient(circle at 85% 8%, rgba(42, 31, 83, 0.62) 0%, transparent 30%),
    linear-gradient(145deg, #04050b 0%, #07101b 42%, #05070f 100%);
  font-family: "Segoe UI", "Avenir Next", "Helvetica Neue", sans-serif;
}

a {
  color: #8de9ff;
}

a:hover {
  color: #b8f6ff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(41, 81, 118, 0.8);
  background: rgba(7, 13, 24, 0.92);
  backdrop-filter: blur(14px);
}

.site-header-inner,
.site-main,
.site-footer-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  padding-left: 18px;
  padding-right: 18px;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 600;
}

.site-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.site-brand small {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  align-items: center;
}

.site-nav a,
.btn-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(9, 21, 35, 0.72);
  text-decoration: none;
  color: var(--text-main);
  font-size: 0.9rem;
}

.site-nav a:hover,
.btn-link:hover {
  border-color: var(--line-bright);
  text-decoration: none;
}

.btn-primary {
  border-color: var(--line-bright);
  background: linear-gradient(90deg, #41f6ff 0%, #63ffd0 100%);
  color: #041019;
  font-weight: 700;
}

.site-nav details {
  position: relative;
}

.site-nav summary {
  list-style: none;
}

.site-nav summary::-webkit-details-marker {
  display: none;
}

.site-nav summary::marker {
  content: "";
}

.site-nav .menu-btn {
  width: 42px;
  padding: 8px 0;
  font-size: 1.2rem;
  line-height: 1;
}

.site-nav-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  border: 1px solid #2a4d70;
  border-radius: var(--radius-sm);
  background: rgba(8, 16, 28, 0.98);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
  padding: 8px;
  display: none;
  z-index: 60;
}

.site-nav details[open] .site-nav-menu {
  display: block;
}

.site-nav-menu a {
  display: block;
  min-height: 34px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  padding: 7px 10px;
  color: #d8efff;
  text-decoration: none;
  font-size: 0.92rem;
}

.site-nav-menu a:hover {
  background: rgba(61, 240, 255, 0.12);
  color: #ecfbff;
}

.site-nav .btn-icon {
  gap: 8px;
}

.site-nav .btn-icon img {
  width: 15px;
  height: 15px;
  object-fit: contain;
}

.site-main {
  padding-top: 28px;
  padding-bottom: 40px;
}

.breadcrumb {
  margin-bottom: 14px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.breadcrumb a {
  text-decoration: none;
  color: #a3ebff;
}

.breadcrumb span {
  margin: 0 6px;
}

.hero-panel,
.content-panel,
.section-card,
.mini-card,
.note-panel {
  border: 1px solid #1f3f62;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(17, 27, 45, 0.92), rgba(10, 17, 30, 0.94));
  box-shadow: var(--shadow);
}

.hero-panel,
.content-panel,
.note-panel {
  padding: 22px;
  margin-bottom: 16px;
}

.hero-panel h1,
.hero-panel h2,
.content-panel h2,
.content-panel h3,
.content-panel h4,
.site-footer h2 {
  margin-top: 0;
  color: #f0fbff;
}

.hero-panel h1 {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.06;
  margin-bottom: 12px;
}

.hero-panel p,
.content-panel p,
.content-panel li,
.content-panel td,
.content-panel th,
.site-footer p,
.site-footer li {
  color: var(--text-soft);
  line-height: 1.68;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-actions,
.inline-actions,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-actions {
  margin-top: 18px;
}

.tag-row {
  margin-top: 14px;
}

.tag,
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid #2b567a;
  background: rgba(8, 22, 38, 0.84);
  color: #dbf7ff;
  font-size: 0.82rem;
}

.lead {
  font-size: 1.06rem;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 12px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.section-card,
.mini-card {
  padding: 16px;
}

.section-card h3,
.mini-card h3,
.mini-card h4 {
  margin-top: 0;
  margin-bottom: 8px;
  color: #edfaff;
}

.section-card p,
.mini-card p,
.mini-card li {
  margin-bottom: 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.mini-card ul,
.content-panel ul,
.content-panel ol {
  margin-top: 0;
  margin-bottom: 0;
  padding-left: 20px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

.comparison-table th,
.comparison-table td {
  border: 1px solid var(--line);
  padding: 12px;
  vertical-align: top;
}

.comparison-table th {
  background: rgba(9, 20, 36, 0.92);
  color: #ecfbff;
  text-align: left;
}

.table-wrap {
  overflow-x: auto;
}

.callout {
  border-left: 3px solid var(--line-bright);
  padding: 14px 16px;
  background: rgba(8, 18, 31, 0.84);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.callout strong {
  color: #f3fdff;
}

.code-block,
pre {
  overflow-x: auto;
  padding: 16px;
  border: 1px solid rgba(61, 240, 255, 0.18);
  border-radius: var(--radius-md);
  background: rgba(4, 11, 20, 0.9);
  color: #d8f7ff;
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.92rem;
  line-height: 1.55;
}

code {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

.diagram {
  margin-top: 12px;
  margin-bottom: 12px;
}

.article-list,
.doc-list,
.faq-list {
  display: grid;
  gap: 14px;
}

.article-item,
.doc-item,
.faq-item {
  padding: 18px;
  border: 1px solid #1f3f62;
  border-radius: var(--radius-md);
  background: rgba(11, 20, 35, 0.86);
}

.article-item h3,
.doc-item h3,
.faq-item h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.84rem;
}

.split-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
  gap: 16px;
  align-items: start;
}

.stats-list {
  display: grid;
  gap: 10px;
}

.stats-list div {
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(61, 240, 255, 0.16);
  background: rgba(6, 16, 28, 0.86);
}

.stats-list strong {
  display: block;
  margin-bottom: 4px;
  color: #f1fbff;
}

.toc {
  display: grid;
  gap: 8px;
}

.toc a {
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid rgba(41, 81, 118, 0.8);
  background: rgba(5, 11, 18, 0.88);
}

.site-footer-inner {
  padding-top: 26px;
  padding-bottom: 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.footer-grid ul {
  list-style: none;
  padding-left: 0;
}

.footer-grid li + li {
  margin-top: 8px;
}

.footer-grid a {
  text-decoration: none;
  color: var(--text-soft);
}

.footer-grid a:hover {
  color: #d4f7ff;
}

.muted {
  color: var(--text-muted);
}

.anchor-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 960px) {
  .grid-4,
  .grid-3,
  .grid-2,
  .split-hero,
  .footer-grid,
  .anchor-grid {
    grid-template-columns: 1fr;
  }

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

  .site-nav {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .site-main,
  .site-header-inner,
  .site-footer-inner {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero-panel,
  .content-panel,
  .note-panel,
  .section-card,
  .mini-card,
  .article-item,
  .doc-item,
  .faq-item {
    padding: 16px;
  }

  .hero-panel h1 {
    font-size: 1.8rem;
  }
}