[data-theme="dark"] {
  --bg: #0E1117; --bg-card: #161B27; --border: #2A3450;
  --accent: #4F8EF7; --accent-dim: #2D5BB3; --accent-glow: rgba(79,142,247,0.18);
  --text: #E8EDF5; --text-dim: #7A8BAA; --text-muted: #4A5875;
  --tag-bg: #1A2640; --tag-text: #4F8EF7;
  --nav-bg: rgba(14,17,23,0.92); --toggle-bg: #1C2333;
}
[data-theme="light"] {
  --bg: #F7F9FC; --bg-card: #FFFFFF; --border: #DDE4F0;
  --accent: #2563EB; --accent-dim: #1D4ED8; --accent-glow: rgba(37,99,235,0.14);
  --text: #0F172A; --text-dim: #475569; --text-muted: #94A3B8;
  --tag-bg: #EEF4FF; --tag-text: #2563EB;
  --nav-bg: rgba(247,249,252,0.95); --toggle-bg: #EEF4FF;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6;
  transition: background .3s ease, color .3s ease;
}
nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px; height: 60px; background: var(--nav-bg);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-logo { font-size: 18px; font-weight: 800; color: var(--text); letter-spacing: -0.5px; text-decoration: none; }
.nav-logo span { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a { font-size: 13px; color: var(--text-dim); text-decoration: none; padding: 6px 12px; border-radius: 6px; transition: all .18s; }
.nav-links a:hover { color: var(--text); background: var(--tag-bg); }
.nav-pro { background: var(--accent) !important; color: #fff !important; font-weight: 600 !important; }
.theme-toggle {
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--toggle-bg); cursor: pointer; font-size: 17px;
  display: flex; align-items: center; justify-content: center; transition: all .2s; flex-shrink: 0;
}
.theme-toggle .icon-dark { display: flex; }
.theme-toggle .icon-light { display: none; }
[data-theme="light"] .theme-toggle .icon-dark { display: none; }
[data-theme="light"] .theme-toggle .icon-light { display: flex; }

.page-wrap { max-width: 760px; margin: 0 auto; padding: 56px 32px 80px; }
.page-eyebrow { font-size: 11px; font-weight: 700; letter-spacing: 1px; color: var(--accent); text-transform: uppercase; margin-bottom: 10px; }
.page-wrap h1 { font-size: 34px; font-weight: 800; letter-spacing: -1px; margin-bottom: 20px; }
.page-wrap h2 { font-size: 20px; font-weight: 700; margin: 32px 0 10px; }
.page-wrap p { color: var(--text-dim); font-size: 15px; line-height: 1.75; margin-bottom: 14px; }
.page-wrap a { color: var(--accent); }
.updated { font-size: 13px; color: var(--text-muted); margin-bottom: 28px; }

.faq-item { margin-bottom: 20px; }
.faq-q {
  font-size: 15px; font-weight: 600; margin-bottom: 6px; color: var(--text);
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg-card); transition: all .18s;
}
.faq-q:hover { border-color: var(--accent); color: var(--accent); }
.faq-q span { font-size: 18px; color: var(--accent); }
.faq-a {
  font-size: 14px; color: var(--text-dim); line-height: 1.75;
  padding: 0 16px; max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s ease;
}
.faq-a.open { max-height: 400px; padding: 12px 16px; }

footer {
  border-top: 1px solid var(--border); padding: 24px 32px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--text-muted);
  max-width: 1200px; margin: 0 auto;
}
footer a { color: var(--text-muted); text-decoration: none; }
footer a:hover { color: var(--accent); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

@media(max-width:600px) {
  nav { padding: 0 16px; }
  .nav-links a:not(.nav-pro) { display: none; }
  .page-wrap { padding: 40px 20px 60px; }
  footer { flex-direction: column; align-items: flex-start; }
}