:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #17233b;
  background: #eef3fa;
}

* { box-sizing: border-box; }

body { margin: 0; }

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(145deg, #eef3fa, #dfe9f7);
}

.login-card {
  width: min(420px, 100%);
  padding: 36px;
  border: 1px solid #d6dfec;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(13, 36, 72, .14);
}

.login-brand { color: #245fc7; font-weight: 800; }
.login-card h1 { margin: 12px 0 8px; font-size: 28px; }
.login-card p { margin: 0 0 26px; color: #66738a; }
.login-card form { display: grid; gap: 10px; }
.login-card label { margin-top: 6px; font-weight: 700; }
.login-card input {
  width: 100%;
  min-height: 44px;
  border: 1px solid #b9c6d8;
  border-radius: 7px;
  padding: 9px 11px;
  font: inherit;
}
.login-card input:focus { outline: 3px solid rgba(47, 111, 237, .2); border-color: #2f6fed; }
.login-card button {
  min-height: 44px;
  margin-top: 12px;
  border: 0;
  border-radius: 7px;
  color: #fff;
  background: #245fc7;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.login-card button:disabled { opacity: .65; cursor: wait; }
.login-error { color: #a52a2a; font-size: 14px; }
.login-message {
  margin: 16px 0;
  padding: 10px 12px;
  border: 1px solid #abefc6;
  border-radius: 7px;
  color: #067647;
  background: #ecfdf3;
  font-size: 13px;
}