@font-face {
  font-family: "Noto Sans";
  src: url("/fonts/NotoSans-Regular.ttf") format("truetype");
  font-weight: 400;
}
@font-face {
  font-family: "Noto Sans";
  src: url("/fonts/NotoSans-Bold.ttf") format("truetype");
  font-weight: 700;
}
:root {
  --bg: #f7f2e9;
  --bg-strong: #f1e7d4;
  --surface: #fffdf8;
  --ink: #111827;
  --muted: #5b6474;
  --accent: #1447e6;
  --accent-soft: #dbe7ff;
  --line: #1f2937;
  --shadow: #f4b740;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Noto Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(20, 71, 230, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(244, 183, 64, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, #fff9ef 100%);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.page-shell { max-width: 1180px; margin: 0 auto; padding: 24px 20px 72px; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding: 18px 20px;
  border: 2px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  box-shadow: 8px 8px 0 var(--shadow);
}
.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}
.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.nav-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 10px 14px;
  background: white;
  font-size: 0.95rem;
  font-weight: 600;
}
.nav-chip.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(280px, 1fr);
  gap: 24px;
  align-items: stretch;
}
.hero-card,
.content-card,
.toc-card,
.post-card,
.cta-card,
.stat-card {
  border: 2px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 12px 12px 0 var(--accent-soft);
}
.hero-card {
  padding: 36px;
  background:
    linear-gradient(140deg, rgba(20, 71, 230, 0.04), rgba(20, 71, 230, 0)),
    var(--surface);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}
h1 { font-size: clamp(2.3rem, 4vw, 4.4rem); line-height: 1.05; margin: 18px 0 14px; }
.hero p { margin: 0; font-size: 1.07rem; line-height: 1.8; color: var(--muted); max-width: 60ch; }
.hero-side {
  padding: 28px;
  display: grid;
  gap: 16px;
  background: linear-gradient(180deg, #10182d, #192449);
  color: white;
  box-shadow: 12px 12px 0 rgba(20, 71, 230, 0.24);
}
.hero-side h2 { margin: 0; font-size: 1.2rem; }
.hero-side p { margin: 0; color: rgba(255,255,255,0.82); line-height: 1.7; }
.section-title {
  margin: 44px 0 18px;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
}
.section-title h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.4rem); }
.section-title p { margin: 0; color: var(--muted); max-width: 64ch; line-height: 1.7; }
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.post-card {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 0.87rem;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: #f3f4f6;
  color: #1f2937;
  font-size: 0.78rem;
  font-weight: 700;
}
.post-card h3 { margin: 0; font-size: 1.35rem; line-height: 1.35; }
.post-card p { margin: 0; color: var(--muted); line-height: 1.7; }
.post-link { margin-top: auto; font-weight: 700; }
.article-layout {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 2.35fr) minmax(260px, 0.95fr);
  gap: 24px;
}
.content-card { padding: 34px; }
.content-card p,
.content-card li {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.85;
}
.content-card h2,
.content-card h3 {
  color: var(--ink);
  scroll-margin-top: 96px;
}
.content-card h2 {
  margin-top: 2rem;
  font-size: 1.7rem;
}
.content-card h3 {
  margin-top: 1.5rem;
  font-size: 1.2rem;
}
.content-card pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 18px;
  background: #0f172a;
  color: #f8fafc;
}
.content-card code {
  font-family: "SFMono-Regular", "Consolas", monospace;
  background: rgba(15, 23, 42, 0.06);
  padding: 2px 6px;
  border-radius: 6px;
}
.content-card pre code { background: transparent; padding: 0; }
.content-card ul,
.content-card ol {
  padding-left: 24px;
}
.content-card blockquote {
  margin: 1.4rem 0;
  padding: 10px 18px;
  border-left: 4px solid var(--accent);
  background: rgba(20, 71, 230, 0.05);
}
.toc-card,
.cta-card,
.stat-card {
  padding: 22px;
  position: sticky;
  top: 24px;
}
.toc-card h3,
.cta-card h3,
.stat-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.05rem;
}
.toc-card ol {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}
.cta-card { margin-top: 20px; box-shadow: 12px 12px 0 rgba(244, 183, 64, 0.35); }
.cta-card p,
.stat-card p { color: var(--muted); line-height: 1.65; }
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  border-radius: 999px;
  padding: 12px 18px;
  background: var(--accent);
  color: white;
  font-weight: 700;
}
.article-header {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 28px;
}
.article-header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
}
.article-excerpt {
  font-size: 1.08rem;
  color: var(--muted);
  line-height: 1.8;
}
.footer-note {
  margin-top: 42px;
  text-align: center;
  color: var(--muted);
  font-size: 0.95rem;
}
@media (max-width: 960px) {
  .hero,
  .article-layout {
    grid-template-columns: 1fr;
  }
  .toc-card,
  .cta-card,
  .stat-card {
    position: static;
  }
}
@media (max-width: 680px) {
  .page-shell { padding: 16px 14px 56px; }
  .topbar,
  .hero-card,
  .content-card,
  .post-card,
  .toc-card,
  .cta-card,
  .stat-card { box-shadow: 8px 8px 0 var(--accent-soft); }
  .hero-card,
  .content-card { padding: 22px; }
  .nav-links { width: 100%; }
}