html,body{margin:0;min-height:100%;font-family:Segoe UI,Arial,sans-serif;background:radial-gradient(circle at top left,rgba(59,130,246,.16),transparent 28%),linear-gradient(180deg,#f8fbff,#edf4ff);color:#0f172a}body{min-height:100vh}.boot-shell{display:grid;place-items:center;min-height:100vh;padding:24px}.boot-card{display:grid;place-items:center;gap:16px;padding:28px 32px;border-radius:24px;border:1px solid rgba(15,23,42,.08);background:rgba(255,255,255,.92);box-shadow:0 18px 48px #0f172a14}.boot-loader{width:42px;height:42px;border-radius:999px;border:3px solid rgba(37,99,235,.18);border-top-color:#2563eb;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}