:root{--brand-bg:#0b0c10;--brand-fg:#fff;--brand-accent:#6b7cff;--brand-surface:#fff;--brand-page:#f6f7f9;--brand-border:#e5e7eb}html,body{height:100%}body{background:var(--brand-page);color:#0f172a;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,Apple Color Emoji,Segoe UI Emoji}a{color:var(--brand-accent);text-decoration:underline}.card{background:var(--brand-surface);border:1px solid var(--brand-border);border-radius:16px;padding:20px;box-shadow:0 1px 2px #0000000a}.btn{border:1px solid var(--brand-border);background:#fff;border-radius:12px;padding:8px 14px;box-shadow:0 1px 2px #0000000a}.btn:hover{background:#fafafa}.sidebar{background:var(--brand-bg);color:var(--brand-fg)}.navlink{color:var(--brand-fg);opacity:.9;border-radius:10px;padding:10px 12px;text-decoration:none;display:block}.navlink:hover{opacity:1;background:#ffffff14}.navlink.active{background:#ffffff29;font-weight:600}.navhead{text-transform:uppercase;opacity:.65;letter-spacing:.04em;margin:16px 0 8px;font-size:11px}