:root{--bg:#0f0f12;--surface:#1a1a1f;--text:#e8e8ed;--muted:#8888a0;--accent:#6366f1;--accent-hover:#818cf8;--session-active:#dc2626;--session-active-hover:#ef4444;--border:#2a2a32}*{box-sizing:border-box;padding:0;margin:0}body,html{max-width:100vw;min-height:100vh;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.session-btn{padding:1rem 2rem;font-size:1.125rem;font-weight:600;border:none;border-radius:12px;cursor:pointer;transition:background .2s,transform .1s}.session-btn:disabled{opacity:.6;cursor:not-allowed}.session-btn-default{background:var(--accent);color:#fff}.session-btn-default:hover:not(:disabled){background:var(--accent-hover)}.session-btn-active{background:var(--session-active);color:#fff}.session-btn-active:hover:not(:disabled){background:var(--session-active-hover)}.session-btn:active:not(:disabled){transform:scale(.98)}