:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --primary: #1e293b;
  --accent: #0284c7;
  --cta: #f59e0b;
  --cta-hover: #d97706;
  --pro-bg: #f0fdf4;
  --pro-border: #bbf7d0;
  --con-bg: #fef2f2;
  --con-border: #fecaca;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 17px;
}
.disclosure-bar {
  background: #0f172a;
  color: #cbd5e1;
  font-size: 13px;
  text-align: center;
  padding: 8px 16px;
}
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.logo span { color: var(--accent); }
nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 20px;
  font-size: 15px;
  font-weight: 600;
}
nav a:hover { color: var(--accent); }
.container {
  max-width: 900px;
  margin: 32px auto;
  padding: 0 20px;
}
.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
h1 {
  font-size: 32px;
  line-height: 1.25;
  margin-bottom: 16px;
  color: #0f172a;
  letter-spacing: -0.5px;
}
.meta {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
h2 {
  font-size: 23px;
  margin: 36px 0 14px;
  color: #0f172a;
  line-height: 1.35;
}
h3 {
  font-size: 19px;
  margin: 24px 0 10px;
}
p { margin-bottom: 18px; }
.tldr-box {
  background: #f0f9ff;
  border-left: 4px solid var(--accent);
  padding: 20px 24px;
  border-radius: 6px;
  margin: 24px 0;
}
.tldr-box h3 { margin-top: 0; color: #0369a1; }
.tldr-box ul { padding-left: 20px; margin-top: 10px; }
.tldr-box li { margin-bottom: 10px; }
.bluf-answer {
  font-weight: 600;
  color: #0f172a;
  background: #f8fafc;
  border: 1px solid var(--border);
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 18px;
}
.table-wrap {
  overflow-x: auto;
  margin: 28px 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
th, td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
}
th {
  background: #f1f5f9;
  font-weight: 700;
}
tr:nth-child(even) { background: #f8fafc; }
.btn-amazon {
  display: inline-block;
  background: var(--cta);
  color: #0f172a;
  font-weight: 700;
  font-size: 14px;
  padding: 8px 14px;
  border-radius: 6px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s;
}
.btn-amazon:hover {
  background: var(--cta-hover);
  color: #ffffff;
}
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 20px 0;
}
@media (max-width: 640px) {
  .pros-cons { grid-template-columns: 1fr; }
  .article-card { padding: 22px; }
  h1 { font-size: 25px; }
}
.pro-box {
  background: var(--pro-bg);
  border: 1px solid var(--pro-border);
  padding: 16px 20px;
  border-radius: 8px;
}
.con-box {
  background: var(--con-bg);
  border: 1px solid var(--con-border);
  padding: 16px 20px;
  border-radius: 8px;
}
.pro-box h4, .con-box h4 { margin-bottom: 8px; font-size: 16px; }
.pro-box ul, .con-box ul { padding-left: 18px; font-size: 15px; }
.faq-item {
  border-top: 1px solid var(--border);
  padding: 16px 0;
}
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.grid-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 24px;
}
.guide-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  background: #ffffff;
  transition: transform 0.15s;
}
.guide-item:hover { border-color: var(--accent); }
.guide-item h3 { margin-top: 0; }
.guide-item a { color: var(--accent); text-decoration: none; font-weight: 700; }
footer {
  max-width: 1040px;
  margin: 60px auto 40px;
  padding: 24px 20px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--muted);
  text-align: center;
}
footer a { color: var(--muted); margin: 0 10px; }
.source-note,.safety-note{padding:14px 18px;border-left:4px solid #0284c7;background:#f0f9ff;font-size:14px;line-height:1.6;margin:18px 0}.safety-note{border-color:#b45309;background:#fffbeb}.source-note ul{padding-left:22px}