:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --panel: #fff;
  --text: #17211b;
  --muted: #66736c;
  --line: #dbe5df;
  --brand: #18a058;
  --brand-dark: #0f7a44;
  --danger: #c2410c;
  --shadow: 0 16px 50px rgba(22, 44, 32, .12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, #eef7f1, var(--bg));
}

button, input { font: inherit; }

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

.login-card {
  width: min(430px, 100%);
  display: grid;
  gap: 22px;
  padding: 28px;
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 900;
}

h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

.muted {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

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

label {
  display: grid;
  gap: 7px;
  color: #314137;
  font-size: 13px;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 11px;
  color: var(--text);
  outline: none;
}

input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(24, 160, 88, .12);
}

button {
  min-height: 42px;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 900;
  cursor: pointer;
}

.error {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
  font-size: 13px;
  font-weight: 800;
}