/* Lumo «Neon Vault» — cùng bảng màu với app (dark-only). */
:root {
  --bg: #0A0A0C; --surface: #141418; --surface2: #1E1E25; --line: #26262F;
  --text: #F5F5F7; --muted: #9A9AA5; --lime: #C8FF3D; --mint: #5CF2C4; --coral: #FF6E7F;
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 32px 16px 64px; background: var(--bg); color: var(--text);
  font: 16px/1.65 Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
main {
  max-width: 760px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px; padding: 36px 28px;
}
header.brand { max-width: 760px; margin: 0 auto 18px; display: flex; align-items: center; gap: 12px; }
header.brand .dot {
  width: 38px; height: 38px; border-radius: 12px; background: var(--lime); flex: none;
  display: grid; place-items: center; color: #0A0A0C; font-weight: 800; font-size: 20px;
}
header.brand b { font-size: 1.15rem; letter-spacing: -.01em; }
header.brand span { color: var(--muted); font-size: .9rem; }
h1 { font-size: 1.7rem; margin: 0 0 6px; letter-spacing: -.02em; }
h2 { font-size: 1.1rem; margin: 30px 0 8px; color: var(--lime); }
h3 { font-size: 1rem; margin: 20px 0 4px; }
p.updated, p.lead { color: var(--muted); margin: 0 0 10px; font-size: .92rem; }
ul { padding-left: 20px; } li { margin: 6px 0; }
a { color: var(--lime); }
code { background: var(--surface2); padding: 1px 6px; border-radius: 5px; font-size: .9em; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .95rem; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.lang { margin: 0 0 18px; font-size: .9rem; color: var(--muted); }
.cards { display: grid; gap: 12px; margin-top: 18px; }
.card {
  display: block; padding: 16px 18px; border: 1px solid var(--line); border-radius: 14px;
  background: var(--surface2); text-decoration: none; color: var(--text);
}
.card b { display: block; color: var(--lime); margin-bottom: 2px; }
.card span { color: var(--muted); font-size: .92rem; }
.note { border-left: 3px solid var(--mint); padding: 8px 0 8px 12px; color: var(--muted); margin: 14px 0; }
footer { max-width: 760px; margin: 20px auto 0; color: var(--muted); font-size: .85rem; text-align: center; }