:root {
  --bg: #ffffff;
  --bg-2: #f5f7fb;
  --fg: #0d1f3c;
  --muted: #5a6a87;
  --accent: #4ea1ff;
  --accent-strong: #2563eb;
  --card: #ffffff;
  --card-hover: #f0f4fb;
  --border: #e2e8f0;
  --shadow: 0 1px 2px rgba(13, 31, 60, 0.04), 0 8px 24px rgba(13, 31, 60, 0.06);
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  height: 40px;
  width: auto;
  display: block;
}

.brand-tag {
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.2px;
}

main {
  flex: 1;
  padding: 72px 0 96px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}

.lead {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.lead-icon {
  width: 96px;
  height: 96px;
  display: block;
  margin: 0 auto 24px;
  filter: drop-shadow(0 8px 24px rgba(78, 161, 255, 0.25));
}

.lead h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  margin: 0 0 18px;
  letter-spacing: -1.2px;
  color: var(--fg);
}

.lead p {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}
.lead-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}
.cta-primary,
.cta-secondary {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
  padding: 11px 22px;
  border-radius: 10px;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.cta-primary {
  background: var(--accent-strong);
  color: #fff;
  border: 1px solid var(--accent-strong);
}
.cta-primary:hover {
  background: var(--fg);
  border-color: var(--fg);
}
.cta-secondary {
  background: transparent;
  color: var(--accent-strong);
  border: 1px solid var(--border);
}
.cta-secondary:hover {
  border-color: var(--accent-strong);
  background: var(--card-hover);
}

.links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--fg);
  box-shadow: var(--shadow);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.link-card:hover {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 31, 60, 0.08), 0 16px 32px rgba(13, 31, 60, 0.08);
}

.link-card[aria-disabled="true"] {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.link-icon {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 4px;
}

.link-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
}

.link-sub {
  font-size: 13px;
  color: var(--muted);
}

footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  background: var(--bg);
}

footer .container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--accent-strong);
}

.dot {
  opacity: 0.5;
}

/* ── Site header (two-row sticky) ───────────────────────────────── */

.site-header-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.site-header-top {
  padding: 14px 0;
}

.site-header-top .container {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-header-top .brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-header-top .brand-logo {
  height: 36px;
  width: auto;
  display: block;
}

.site-header-top .brand-tag {
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.2px;
  margin-right: auto;
}

.site-header-menu {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}

.site-menu {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex-wrap: wrap;
}

.site-menu > .menu-item {
  position: relative;
}

.site-menu .menu-link,
.site-menu .menu-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 18px;
  background: transparent;
  border: none;
  color: var(--fg);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease,
              background 0.15s ease;
}

.site-menu .menu-link:hover,
.site-menu .menu-trigger:hover,
.site-menu .menu-item[data-open="true"] .menu-trigger {
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.5);
}

.site-menu .menu-link[aria-current="page"],
.site-menu .menu-item[data-section-current="true"] > .menu-trigger {
  color: var(--accent-strong);
  border-bottom-color: var(--accent-strong);
}

.menu-trigger::after {
  content: "\25BE";
  font-size: 10px;
  opacity: 0.7;
}

.menu-panel {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0 0 10px 10px;
  box-shadow: var(--shadow);
  padding: 6px;
  display: none;
  z-index: 10;
}

.menu-item[data-open="true"] > .menu-panel {
  display: block;
}

.menu-panel a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.35;
}

.menu-panel a:hover {
  background: var(--card-hover);
  color: var(--accent-strong);
}

.menu-panel a[aria-current="page"] {
  background: var(--card-hover);
  color: var(--accent-strong);
  font-weight: 600;
}

.menu-panel-sub {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.menu-panel a:hover .menu-panel-sub {
  color: var(--accent-strong);
}

@media (max-width: 640px) {
  .site-header-top .brand-tag {
    display: none;
  }
  .site-menu .menu-link,
  .site-menu .menu-trigger {
    padding: 10px 12px;
    font-size: 13px;
  }
  .menu-panel {
    min-width: 200px;
  }
}

/* ── Page body content ─────────────────────────────────────────── */

.page-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 0 80px;
}

.page-body h1 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.6px;
  margin: 0 0 8px;
}

.page-body .lede {
  font-size: 17px;
  color: var(--muted);
  margin: 0 0 32px;
  line-height: 1.6;
}

.page-body h2 {
  font-size: 22px;
  margin: 36px 0 8px;
  letter-spacing: -0.2px;
}

.page-body h3 {
  font-size: 16px;
  margin: 24px 0 6px;
  letter-spacing: -0.1px;
}

.page-body p,
.page-body li {
  font-size: 15px;
  line-height: 1.65;
  color: var(--fg);
}

.page-body ul,
.page-body ol {
  padding-left: 22px;
  margin: 8px 0 14px;
}

.page-body li + li {
  margin-top: 4px;
}

.page-body code {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 13px;
  background: var(--bg-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.page-body pre {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 13px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 12px 0 18px;
}

.page-body pre code {
  background: transparent;
  border: none;
  padding: 0;
}

.callout {
  border-left: 3px solid var(--accent);
  background: var(--bg-2);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  font-size: 14px;
}

/* ── Product card list ─────────────────────────────────────────── */

.product-card {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  margin: 16px 0;
}

.product-card-icon {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  background: var(--bg-2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-card-icon img {
  width: 72px;
  height: auto;
}

.product-card-body h3 {
  margin: 0 0 4px;
  font-size: 18px;
}

.product-card-tagline {
  font-size: 14px;
  color: var(--accent-strong);
  font-weight: 600;
  letter-spacing: 0.2px;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.product-card-body p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.product-card-cta {
  display: inline-flex;
  gap: 8px;
  font-size: 13px;
}

.product-card-cta a {
  color: var(--accent-strong);
  text-decoration: none;
}

.product-card-cta a:hover {
  text-decoration: underline;
}

/* ── Support form ──────────────────────────────────────────────── */

.support-form {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.support-form label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.support-form input,
.support-form select,
.support-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  font-size: 14px;
}

.support-form input:focus,
.support-form select:focus,
.support-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(78, 161, 255, 0.18);
}

.support-form textarea {
  min-height: 140px;
  resize: vertical;
  font-family: inherit;
}

.support-form button {
  align-self: start;
  padding: 10px 18px;
  background: var(--accent-strong);
  color: white;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.support-form button:hover {
  background: #1e4fce;
}

/* ── Docs sidebar layout ───────────────────────────────────────── */

.docs-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 0 80px;
}

@media (max-width: 760px) {
  .docs-shell {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.docs-sidebar {
  font-size: 14px;
  position: sticky;
  top: 24px;
  align-self: start;
}

.docs-sidebar h2 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--muted);
  text-transform: uppercase;
  margin: 16px 0 6px;
}

.docs-sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.docs-sidebar li {
  margin: 2px 0;
}

.docs-sidebar a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--fg);
  text-decoration: none;
}

.docs-sidebar a:hover {
  background: var(--card-hover);
  color: var(--accent-strong);
}

.docs-sidebar a[aria-current="page"] {
  background: var(--card-hover);
  color: var(--accent-strong);
  font-weight: 600;
}

.docs-content {
  min-width: 0;
}

/* ── Reference table ───────────────────────────────────────────── */

.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 14px 0 24px;
}

.ref-table th,
.ref-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.ref-table th {
  background: var(--bg-2);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
}

.ref-table td code {
  white-space: nowrap;
}