:root {
  --ink: #15211c;
  --muted: #67756e;
  --teal: #0d7564;
  --line: #dfe4df;
  --canvas: #eef2ef;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(rgba(15, 54, 44, 0.82), rgba(15, 54, 44, 0.72)),
    radial-gradient(circle at 20% 20%, #4a8f7d 0, transparent 36%),
    #14362e;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Segoe UI", sans-serif;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.login-panel {
  width: min(460px, 100%);
  padding: 34px;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 8px;
  box-shadow: 0 30px 90px rgba(4, 23, 17, 0.28);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.login-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--teal);
  border-radius: 8px;
  font-family: Georgia, serif;
  font-weight: 700;
}

.login-brand p {
  margin: 0 0 2px;
  color: var(--teal);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.2px;
}

.login-brand h1 {
  margin: 0;
  font-size: 22px;
}

.login-intro {
  margin: 22px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: #44534c;
  font-size: 11px;
  font-weight: 700;
}

input {
  height: 42px;
  padding: 0 12px;
  color: var(--ink);
  background: #f8faf8;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

input:focus {
  outline: 0;
  border-color: #7fb9aa;
  box-shadow: 0 0 0 3px rgba(13, 117, 100, 0.09);
}

button {
  height: 42px;
  color: #fff;
  background: var(--teal);
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.login-error {
  padding: 9px 11px;
  color: #a33e3e;
  background: #fff0f0;
  border: 1px solid #efcaca;
  border-radius: 5px;
  font-size: 11px;
}

.login-note {
  margin: 18px 0 0;
  color: #8b9691;
  font-size: 9px;
  line-height: 1.6;
}