:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --line: #d9e4f2;
  --text: #10233e;
  --muted: #4e6788;
  --primary: #0f4db8;
  --primary-dark: #0c3f96;
  --accent: #0d9488;
  --radius: 14px;
  --shadow: 0 10px 28px rgba(16, 35, 62, 0.1);
  --maxw: 1060px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef4ff 0%, var(--bg) 34%);
  line-height: 1.62;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }
header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.94);
  border-bottom: 1px solid var(--line);
}
.topbar {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand { font-weight: 800; font-size: 1.17rem; letter-spacing: 0.1px; }
nav { display: flex; gap: 10px 14px; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: 0.94rem; }
main { padding: 30px 0 44px; }
.hero, .section, .article-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero { padding: 24px; margin-bottom: 16px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 18px;
  align-items: center;
}
.hero img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #f8fbff;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid rgba(15, 77, 184, 0.22);
  background: rgba(15, 77, 184, 0.08);
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-transform: uppercase;
}
h1 {
  margin: 12px 0 10px;
  font-size: clamp(1.42rem, 3.8vw, 2.08rem);
  line-height: 1.2;
}
h2 {
  margin: 24px 0 8px;
  font-size: clamp(1.08rem, 2.7vw, 1.36rem);
  line-height: 1.3;
}
h3 {
  margin: 18px 0 6px;
  font-size: clamp(1rem, 2.2vw, 1.14rem);
}
p { margin: 10px 0; }
.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 8px;
}
.toc {
  margin: 14px 0 4px;
  padding: 12px;
  border-radius: 12px;
  border: 1px dashed var(--line);
  background: #f9fbff;
}
.toc ul { margin: 6px 0 0 18px; padding: 0; }
.toc li { margin: 5px 0; }
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.article-card {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.article-card img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.article-card h3 { margin: 3px 0; }
.kpi-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.kpi {
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 10px;
  background: #fbfdff;
}
.kpi strong { font-size: 1.08rem; }
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.btn {
  display: inline-block;
  border-radius: 11px;
  padding: 10px 14px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.92rem;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn.ghost { background: #fff; border-color: var(--line); color: var(--text); }
.table-wrap { overflow-x: auto; margin: 10px 0; }
table {
  border-collapse: collapse;
  width: 100%;
  min-width: 620px;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
th, td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 10px;
  vertical-align: top;
}
th { background: #f5f9ff; font-size: 0.9rem; }
blockquote {
  margin: 12px 0;
  padding: 12px 14px;
  border-left: 4px solid var(--primary);
  background: #f3f8ff;
  border-radius: 8px;
}
.related {
  margin-top: 18px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fbfdff;
}
.section p > img,
.section img[src*="/assets/images/blog/notion-build-first-etf-portfolio/"] {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 12px auto;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #f8fbff;
}
.disclaimer {
  margin-top: 18px;
  font-size: 0.88rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
footer {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 22px 0;
}
.foot {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}
.foot h3 { margin: 0 0 7px; font-size: 0.95rem; }
.foot a { display: block; margin: 6px 0; font-size: 0.9rem; color: var(--muted); }
.copy { margin-top: 12px; font-size: 0.84rem; color: var(--muted); }
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .kpi-row { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  nav { display: none; }
  .grid { grid-template-columns: 1fr; }
  .foot { grid-template-columns: 1fr; }
  h1 { font-size: 1.44rem; }
  .hero { padding: 16px; }
  .section { padding: 14px !important; }
  .section p > img,
  .section img[src*="/assets/images/blog/notion-build-first-etf-portfolio/"] {
    margin: 10px auto;
    border-radius: 10px;
  }
}