:root {
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #102a2a;
  background: #e9f1ef;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 20% 10%, #f7fbfa 0, #e8f1ef 44%, #dce9e6 100%); }
.login-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(320px, 1.05fr) minmax(360px, .95fr); }
.brand-panel { padding: clamp(42px, 8vw, 112px); display: flex; flex-direction: column; justify-content: center; background: linear-gradient(145deg, #0c4f4c, #0f6861); color: white; }
.brand-panel h1 { font-size: clamp(42px, 5.5vw, 76px); margin: 10px 0 24px; letter-spacing: -.04em; }
.brand-panel > p:not(.eyebrow) { max-width: 580px; line-height: 1.85; color: #d7f1ec; font-size: 18px; }
.brand-panel ul { margin: 32px 0 0; padding-left: 22px; display: grid; gap: 14px; color: #ecfffb; }
.eyebrow { margin: 0; letter-spacing: .16em; font-weight: 800; font-size: 12px; color: #8ae0d2; }
.login-card { align-self: center; width: min(460px, calc(100% - 48px)); margin: 24px auto; padding: 44px; background: rgba(255,255,255,.94); border: 1px solid #cddedb; border-radius: 22px; box-shadow: 0 28px 70px rgba(30,73,68,.16); }
.login-card h2 { margin: 8px 0; font-size: 30px; }
.muted { color: #6b7f7d; margin: 0 0 28px; }
form { display: grid; gap: 20px; }
label { display: grid; gap: 8px; font-weight: 700; color: #334b49; }
input { width: 100%; border: 1px solid #bdd0cc; border-radius: 11px; padding: 14px 15px; font: inherit; outline: none; background: #fbfdfd; }
input:focus { border-color: #148077; box-shadow: 0 0 0 4px rgba(20,128,119,.12); }
button { border: 0; border-radius: 11px; padding: 14px; font: inherit; font-weight: 800; color: white; background: #126f68; cursor: pointer; }
button:hover { background: #0d5c57; }
button:disabled { opacity: .6; cursor: wait; }
.status { min-height: 22px; margin: 0; color: #b42318; }
@media (max-width: 780px) {
  .login-shell { grid-template-columns: 1fr; }
  .brand-panel { min-height: 38vh; padding: 40px 28px; }
  .brand-panel h1 { font-size: 42px; }
  .brand-panel ul { display: none; }
  .login-card { margin: 32px auto; padding: 30px; }
}