body{min-height:100vh;display:grid;place-items:center;padding:1rem;background:#edf5f3;color:#172033}
.login-card{width:min(420px,100%);border:1px solid #dbe4e2;border-radius:8px;box-shadow:0 16px 42px rgba(15,23,42,.12)}
.login-brand{display:flex;align-items:center;gap:.75rem}
.login-brand img{width:48px;height:48px;border-radius:8px}
.form-control{min-height:46px}.btn{min-height:46px;font-weight:700}
.install-button{display:none}.install-button.available{display:block}
.loading-overlay{position:fixed;inset:0;display:none;background:rgba(15,23,42,.18);z-index:2000}.loading-overlay.show{display:block}