.footer{width:100%;z-index:100}.footer-fixed{position:fixed;left:0;bottom:0}.footer-static{position:static}:root.theme-light{--radius: 10px;--radius-lg: 14px;--shadow-xs: 0 1px 2px rgba(0,0,0,.06);--shadow-sm: 0 2px 6px rgba(0,0,0,.08);--shadow: 0 4px 18px rgba(0,0,0,.1);--bg: #ebecef;--fg: #1f2937;--fg-muted: #6b7280;--fg-strong: #111827;--surface: rgba(255, 255, 255, .8);--surface-2: #f3f4f6;--border: #e5e7eb;--accent: #3b82f6;--accent-weak: #dbeafe;--accent-strong: #1d4ed8;--on-accent: white}:root.theme-dark{--radius: 10px;--radius-lg: 14px;--shadow-xs: 0 1px 2px rgba(0,0,0,.06);--shadow-sm: 0 2px 6px rgba(0,0,0,.08);--shadow: 0 4px 18px rgba(0,0,0,.1);--bg: #0b1220;--fg: #e5e7eb;--fg-muted: #9ca3af;--fg-strong: #f3f4f6;--surface: rgba(15, 23, 42, .8);--surface-2: #111827;--border: #1f2937;--accent: #60a5fa;--accent-weak: #172554;--accent-strong: #93c5fd;--on-accent: #0b1220}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica Neue,Arial,Noto Sans,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol;background:var(--bg);color:var(--fg)}h1,h2,h3,h4{color:var(--fg-strong)}a{color:inherit;text-decoration:none}.muted{color:var(--fg-muted)}.btn{border:1px solid var(--border);background:var(--surface);color:var(--fg);padding:.6rem .9rem;border-radius:var(--radius);cursor:pointer;transition:transform .06s ease;box-shadow:var(--shadow-xs)}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn--primary{background:var(--accent);color:var(--on-accent);border-color:transparent}.card-surface{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:1rem}