:root {
  --bg: #09090b;
  --panel: #131317;
  --ink: #f5f5f7;
  --muted: #a3a3ad;
  --line: rgba(255, 255, 255, 0.1);
  --accent: #4f8ffb;
  --accent-2: #55c4ff;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 0% 0%, #161630, transparent 32%), var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

a {
  color: var(--accent-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1120px, calc(100% - 2.4rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(9, 9, 11, 0.84);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 1rem;
}

.brand {
  color: var(--ink);
  font-weight: 700;
}

.site-nav {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
  padding: 0.35rem 0.62rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: 120ms ease;
}

.site-nav a:hover {
  color: var(--ink);
  border-color: var(--line);
  text-decoration: none;
}

.site-nav a.active {
  color: #ffffff;
  border-color: rgba(79, 143, 251, 0.45);
  background: rgba(79, 143, 251, 0.16);
}

main {
  padding: 2rem 0 2.2rem;
}

.hero {
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(150deg, #181824 0%, #101015 100%);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--accent-2);
  font-size: 0.76rem;
  font-weight: 600;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

.hero h1 {
  margin: 0.48rem 0 0.8rem;
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
}

.hero p {
  max-width: 74ch;
  color: var(--muted);
}

.hero-actions {
  margin-top: 1.05rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.58rem 0.96rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-weight: 600;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  border-color: rgba(79, 143, 251, 0.65);
  background: linear-gradient(135deg, rgba(79, 143, 251, 0.95), rgba(85, 196, 255, 0.95));
}

.btn-ghost {
  color: var(--ink);
  background: transparent;
}

.panel {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
  padding: 1.2rem;
}

.panel-header h2 {
  margin: 0;
}

.panel-header p {
  margin-top: 0.25rem;
  color: var(--muted);
}

.chat-embed {
  margin-top: 0.85rem;
  width: 100%;
  min-height: 720px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #000;
}

.embed-note {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.grid {
  margin-top: 1rem;
  display: grid;
  gap: 0.8rem;
}

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

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

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #141418;
  padding: 1rem;
}

.card h2,
.card h3 {
  margin-top: 0;
}

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

.stack {
  display: grid;
  gap: 1rem;
}

.list {
  margin: 0;
  padding-left: 1.1rem;
}

.list li {
  margin: 0.3rem 0;
  color: var(--muted);
}

.tag-row {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tags {
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  border-radius: 999px;
  border: 1px solid var(--line);
  padding: 0.38rem 0.68rem;
  color: var(--ink);
  background: #1a1a1e;
  cursor: pointer;
}

.tag.active {
  border-color: rgba(79, 143, 251, 0.65);
  background: rgba(79, 143, 251, 0.18);
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 1.2rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
  padding: 1.1rem 0;
}

.article-meta {
  color: var(--muted);
  margin-top: 0.4rem;
  margin-bottom: 0;
}

.article-metadata {
  margin-top: 0.4rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.article-metadata .tags {
  margin-top: 0;
}

.article-prose > *:first-child {
  margin-top: 0;
}

.article-prose h2,
.article-prose h3,
.article-prose h4 {
  margin-top: 1.2rem;
  margin-bottom: 0.55rem;
}

.article-prose p,
.article-prose li {
  color: #d8d8de;
}

.article-prose p {
  margin: 0.55rem 0;
}

.article-prose ul,
.article-prose ol {
  margin: 0.45rem 0 0.9rem 1.3rem;
}

.article-prose code {
  padding: 0.12rem 0.3rem;
  border-radius: 6px;
  background: #202026;
}

.article-prose pre {
  overflow-x: auto;
  padding: 0.8rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0f0f12;
}

.article-prose pre code {
  padding: 0;
  background: transparent;
}

.article-prose blockquote {
  margin: 0.9rem 0;
  padding: 0.1rem 0 0.1rem 0.9rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

.article-prose .callout {
  margin: 0.9rem 0;
  padding: 0.8rem 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #15151a;
}

.article-prose .callout-title {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  text-transform: capitalize;
}

.article-prose .callout-body {
  margin-top: 0.45rem;
}

.article-prose .callout-body > *:first-child {
  margin-top: 0;
}

.article-prose .callout-body > *:last-child {
  margin-bottom: 0;
}

.article-prose .callout-note {
  border-left: 4px solid #4f8ffb;
}

.article-prose .callout-tip {
  border-left: 4px solid #27c17a;
}

.article-prose .callout-warning,
.article-prose .callout-caution {
  border-left: 4px solid #f4b04f;
}

.article-prose .callout-important {
  border-left: 4px solid #a78bfa;
}

.article-prose .callout-danger {
  border-left: 4px solid #f87171;
}

.article-prose img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0.8rem 0;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.article-prose .embed-frame-wrap {
  margin: 0.9rem 0;
}

.article-prose .embed-frame {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0f0f12;
}

.link-preview-overlay {
  position: fixed;
  z-index: 9999;
  width: min(360px, 42vw);
  max-height: 280px;
  pointer-events: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0f0f12;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.link-preview-overlay img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 900px) {
  .three-col,
  .two-col {
    grid-template-columns: 1fr;
  }

  .chat-embed {
    min-height: 620px;
  }
}