:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-alt: #f9fafb;
  --border: #e5e7eb;
  --text: #111827;
  --ts: #6b7280;
  --primary: #0f766e;
  --primary-light: #ecfdf5;
  --primary-dark: #115e59;
  --accent: #0891b2;
  --green: #059669;
  --red: #dc2626;
  --amber: #f59e0b;
  --max: 760px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.nav {
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav a.logo { font-weight: 800; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
.nav a.logo span { color: var(--primary); }
.nav .back { font-size: .85rem; color: var(--ts); text-decoration: none; font-weight: 500; }
.nav .back:hover { color: var(--primary); }
.container { max-width: var(--max); margin: 0 auto; padding: 48px 20px; }
.breadcrumb { font-size: .8rem; color: var(--ts); margin-bottom: 16px; }
.breadcrumb a { color: var(--primary); text-decoration: none; }
h1 { font-size: 1.9rem; font-weight: 800; line-height: 1.2; margin-bottom: 12px; letter-spacing: -0.03em; }
.meta { font-size: .82rem; color: var(--ts); margin-bottom: 32px; }
.meta .tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 3px 10px; border-radius: 4px; font-weight: 600; margin-right: 8px; }

h2 { font-size: 1.4rem; font-weight: 700; margin: 36px 0 14px; letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; font-weight: 700; margin: 28px 0 10px; }
p { margin-bottom: 16px; font-size: .95rem; }
ul, ol { margin-bottom: 16px; padding-left: 24px; }
li { margin-bottom: 8px; font-size: .95rem; }

.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.pros, .cons { border-radius: 10px; padding: 20px; }
.pros { background: #ecfdf5; border: 1px solid #bbf7d0; }
.cons { background: #fef2f2; border: 1px solid #fecaca; }
.pros h4, .cons h4 { font-size: .9rem; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }
.pros h4 { color: var(--green); }
.cons h4 { color: var(--red); }
.pros ul, .cons ul { list-style: none; padding-left: 0; }
.pros li, .cons li { font-size: .88rem; margin-bottom: 6px; padding-left: 20px; position: relative; }
.pros li::before { content: "+"; position: absolute; left: 0; font-weight: 700; color: var(--green); }
.cons li::before { content: "-"; position: absolute; left: 0; font-weight: 700; color: var(--red); }

table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .88rem; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--surface-alt); font-weight: 600; font-size: .8rem; text-transform: uppercase; color: var(--ts); letter-spacing: .03em; }
td:first-child { font-weight: 600; }

.score-card { display: flex; align-items: center; gap: 12px; background: var(--surface-alt); border-radius: 10px; padding: 16px 20px; margin: 20px 0; }
.score-circle { width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; font-weight: 800; color: #fff; flex-shrink: 0; }
.score-label { font-size: .85rem; font-weight: 700; }
.score-sub { font-size: .78rem; color: var(--ts); }

.cta-box { background: var(--primary-light); border: 1px solid #99f6e4; border-radius: 12px; padding: 24px; margin: 28px 0; text-align: center; }
.cta-box h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: var(--primary-dark); }
.cta-box p { font-size: .88rem; color: var(--ts); margin-bottom: 14px; }
.cta-box a { display: inline-block; background: var(--primary); color: #fff; padding: 10px 24px; border-radius: 8px; font-weight: 700; font-size: .88rem; text-decoration: none; }
.cta-box a:hover { background: var(--primary-dark); }

.ad-inline { background: var(--surface-alt); border-radius: 8px; padding: 20px; text-align: center; color: var(--ts); font-size: .78rem; margin: 24px 0; }

blockquote { border-left: 3px solid var(--primary); padding: 12px 20px; margin: 20px 0; background: var(--surface-alt); border-radius: 0 8px 8px 0; font-size: .92rem; color: var(--text); }

.callout { background: #fef3c7; border: 1px solid #fde68a; border-radius: 8px; padding: 16px 20px; margin: 20px 0; font-size: .88rem; }
.callout strong { color: #92400e; }

.related { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.related h3 { font-size: 1rem; font-weight: 700; margin-bottom: 12px; }
.related ul { list-style: none; padding-left: 0; }
.related li { margin-bottom: 6px; }
.related a { font-size: .88rem; color: var(--primary); }

.footer { background: var(--surface-alt); border-top: 1px solid var(--border); padding: 32px 20px; text-align: center; font-size: .82rem; color: var(--ts); margin-top: 48px; }
.footer a { color: var(--primary); text-decoration: none; }

@media (max-width: 640px) {
  .pros-cons { grid-template-columns: 1fr; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.2rem; }
}