:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #111827;
  --muted: #667085;
  --border: #d0d5dd;
  --accent: #111827;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top, #ffffff 0, #edf2f7 45%, #e2e8f0 100%);
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(100%, 460px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 24px 70px rgba(15, 23, 42, .12);
}
.login-brand { display:flex; gap:14px; align-items:center; margin-bottom:18px; }
.login-brand__badge {
  width: 48px; height: 48px; border-radius: 16px; display:grid; place-items:center;
  background: linear-gradient(135deg, #111827, #1d4ed8); color:#fff; font-weight:700;
}
.login-muted { color: var(--muted); }
.login-form { display:grid; gap:14px; margin-top:18px; }
.login-form label { display:grid; gap:6px; font-size:.95rem; }
.login-form input {
  width:100%; border:1px solid var(--border); border-radius: 12px; padding: 13px 14px; font-size: 1rem;
}
.login-form button {
  margin-top: 4px; border:0; border-radius:12px; padding:14px 16px; font-weight:700; cursor:pointer;
  background: var(--accent); color:#fff;
}
.login-message { min-height: 22px; color: #b42318; margin: 12px 0 0; }