:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --panel: #ffffff;
  --ink: #20231f;
  --muted: #687064;
  --line: #dedbd1;
  --accent: #1c7c54;
  --accent-dark: #135d40;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

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

.login-panel {
  width: min(100%, 420px);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(33, 36, 31, 0.1);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0;
}

.muted {
  margin: 12px 0 24px;
  color: var(--muted);
  line-height: 1.7;
}

form {
  display: grid;
  gap: 10px;
}

label {
  color: var(--muted);
  font-size: 14px;
}

input,
button {
  min-height: 46px;
  border-radius: 8px;
  font: inherit;
}

input {
  width: 100%;
  padding: 0 12px;
  border: 1px solid var(--line);
  outline: none;
}

input:focus {
  border-color: var(--accent);
}

button {
  border: 0;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.message {
  min-height: 22px;
  margin: 14px 0 0;
  color: #a64028;
}