:root {
  --bg: #eef2f7;
  --panel: #ffffff;
  --text: #122033;
  --muted: #697586;
  --line: #d9e2ec;
  --green: #087f5b;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: "Microsoft YaHei", Arial, sans-serif;
}

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

.login-panel {
  width: min(420px, 100%);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 48px rgba(18, 32, 51, 0.12);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 22px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  background: var(--green);
  font-weight: 900;
}

.brand strong,
.brand small,
label,
input,
button {
  display: block;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
}

.login-form {
  display: grid;
  gap: 14px;
}

label {
  font-size: 13px;
  font-weight: 800;
}

input {
  width: 100%;
  margin-top: 7px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(8, 127, 91, 0.18);
  border-color: var(--green);
}

button {
  width: 100%;
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  color: #ffffff;
  background: #122033;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

#loginMessage {
  min-height: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

#loginMessage.error {
  color: var(--danger);
}