*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg: #EEF0F8; --card: #fff; --accent: #5B6CF9; --accent2: #8B5CF6;
    --accent-light: #EEF0FD; --text: #1A1D2E; --muted: #6B7280;
    --faint: #9CA3AF; --border: #E5E7EB;
}
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
/* nav */
.topnav { height: 56px; display: flex; align-items: center; justify-content: space-between; padding: 0 32px; background: rgba(238,240,248,0.85); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topnav-logo { display: flex; align-items: center; gap: 7px; text-decoration: none; }
.logo-icon { width: 28px; height: 28px; border-radius: 7px; background: var(--accent-light); border: 1px solid rgba(91,108,249,0.2); display: flex; align-items: center; justify-content: center; }
.logo-text { font-size: 15px; font-weight: 900; color: var(--text); letter-spacing: 1px; }
.back-link { font-size: 13px; font-weight: 500; color: var(--muted); display: flex; align-items: center; gap: 5px; text-decoration: none; transition: color .15s; }
.back-link:hover { color: var(--text); text-decoration: none; }
/* content */
.page-wrap { max-width: 720px; margin: 0 auto; padding: 56px 32px 80px; flex: 1; }
.page-tag { display: inline-block; font-size: 11px; font-weight: 700; color: var(--accent); letter-spacing: .08em; text-transform: uppercase; padding: 4px 12px; border-radius: 50px; background: var(--accent-light); border: 1px solid rgba(91,108,249,0.2); margin-bottom: 18px; }
h1 { font-size: 32px; font-weight: 800; letter-spacing: -1px; line-height: 1.15; margin-bottom: 12px; }
.lead { font-size: 16px; color: var(--muted); line-height: 1.7; margin-bottom: 40px; border-bottom: 1px solid var(--border); padding-bottom: 32px; }
h2 { font-size: 17px; font-weight: 700; margin: 32px 0 10px; letter-spacing: -0.2px; }
p { font-size: 14px; color: var(--muted); line-height: 1.8; margin-bottom: 14px; }
ul { padding-left: 20px; margin-bottom: 14px; }
ul li { font-size: 14px; color: var(--muted); line-height: 1.8; margin-bottom: 4px; }
/* footer */
.page-footer { border-top: 1px solid var(--border); padding: 20px 32px; display: flex; align-items: center; justify-content: space-between; background: #fff; }
.page-footer p { font-size: 12px; color: var(--faint); margin: 0; }
.page-footer-links { display: flex; gap: 16px; }
.page-footer-links a { font-size: 12px; color: var(--faint); text-decoration: none; transition: color .15s; }
.page-footer-links a:hover { color: var(--muted); text-decoration: none; }
@media (max-width: 600px) {
    .topnav { padding: 0 16px; }
    .page-wrap { padding: 36px 20px 60px; }
    h1 { font-size: 26px; }
    .page-footer { flex-direction: column; gap: 8px; text-align: center; padding: 16px; }
}