:root {
  color-scheme: light;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #17212b;
  background: #eef2f5;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background: #eef2f5;
}

.login-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(100%, 380px);
  padding: 28px 24px;
  border: 1px solid #d7dee5;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 32px rgba(30, 42, 54, .1);
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 8px;
  background: #263341;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  place-items: center;
}

h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0;
}

p {
  margin: 8px 0 24px;
  color: #687684;
  font-size: 13px;
}

form, label {
  display: grid;
  gap: 8px;
}

form { gap: 16px; }

label {
  color: #536170;
  font-size: 13px;
}

input, button {
  width: 100%;
  min-height: 46px;
  border-radius: 7px;
  font: inherit;
}

input {
  border: 1px solid #cbd4dc;
  padding: 0 12px;
  background: #fff;
  color: #17212b;
}

input:focus {
  border-color: #2860a9;
  outline: 2px solid rgba(40, 96, 169, .16);
}

button {
  border: 1px solid #2860a9;
  background: #2860a9;
  color: #fff;
  font-weight: 800;
}

button:disabled { opacity: .6; }

.login-error {
  min-height: 18px;
  color: #b4232d;
  font-size: 12px;
  line-height: 1.5;
}