:root {
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #172033;
  background: #f5f7fa;
}
* { box-sizing: border-box; }
body { margin: 0; }
.login-layout { min-height: 100vh; display: grid; grid-template-columns: minmax(420px, 46%) 1fr; }
.brand-panel {
  position: relative;
  overflow: hidden;
  padding: 42px 48px;
  color: #fff;
  background: linear-gradient(145deg, #172640 0%, #243d63 58%, #315174 100%);
}
.brand-panel::before, .brand-panel::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 50%;
}
.brand-panel::before { width: 540px; height: 540px; right: -290px; top: 90px; }
.brand-panel::after { width: 320px; height: 320px; right: -100px; bottom: -180px; }
.brand-lockup { position: relative; z-index: 1; display: flex; align-items: center; gap: 12px; font-size: 19px; }
.brand-lockup img { width: 39px; height: 39px; object-fit: contain; border-radius: 50%; }
.brand-message { position: absolute; z-index: 1; left: 48px; right: 48px; top: 50%; transform: translateY(-45%); }
.brand-message p { color: #ff9a5e; font-size: 12px; letter-spacing: .18em; }
.brand-message h1 { margin: 20px 0; font-size: clamp(29px, 3vw, 43px); line-height: 1.4; font-weight: 600; }
.brand-message span { color: #b9c7da; font-size: 15px; }
.login-panel { display: grid; place-items: center; padding: 36px; background: #f7f8fa; }
.login-card { width: min(390px, 100%); }
.mobile-brand { display: none; }
.login-card h2 { margin: 0; font-size: 27px; }
.hint { margin: 10px 0 32px; color: #758197; }
.login-card label { display: block; margin: 18px 0 8px; color: #46546a; font-size: 14px; }
.login-card input { width: 100%; height: 46px; padding: 0 13px; border: 1px solid #ced6e1; border-radius: 6px; background: #fff; font: inherit; outline: none; }
.login-card input:focus { border-color: #e66a2c; box-shadow: 0 0 0 3px rgba(230,106,44,.11); }
.error { min-height: 22px; margin: 12px 0 2px; color: #c73b43; font-size: 13px; }
.login-card button { width: 100%; height: 46px; margin-top: 8px; border: 0; border-radius: 6px; color: #fff; background: #e66a2c; font: inherit; font-weight: 600; cursor: pointer; }
.login-card button:hover { background: #d85e24; }
.login-card button:disabled { opacity: .65; cursor: wait; }
.login-card small { display: block; margin-top: 22px; color: #98a2b1; text-align: center; }
@media (max-width: 760px) {
  .login-layout { grid-template-columns: 1fr; }
  .brand-panel { display: none; }
  .login-panel { padding: 28px; }
  .mobile-brand { display: block; margin-bottom: 36px; color: #e66a2c; font-size: 19px; font-weight: 700; }
}