:root {
  --bg: #f4f1ea;
  --panel: #fffdf8;
  --ink: #23221e;
  --muted: #746d62;
  --line: rgba(35, 34, 30, 0.14);
  --green: #263a32;
  --accent: #a34f38;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.login-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 20px;
}

.login-panel {
  width: min(440px, 100%);
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.login-panel h1 {
  margin: 0;
}

.login-brand {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 14px;
  background: var(--green);
}

.brand-logo {
  display: block;
  width: 180px;
  height: auto;
}

.login-panel h1 {
  margin-top: 14px;
  font-size: 34px;
}

form {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

input,
button {
  min-height: 44px;
  font: inherit;
}

input {
  width: 100%;
  padding: 0 12px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
}

button {
  color: #fff;
  background: var(--green);
  border: 0;
  font-weight: 600;
  cursor: pointer;
}

.message {
  min-height: 24px;
  color: var(--accent);
  font-weight: 600;
}

.demo-box {
  display: grid;
  gap: 6px;
  margin-top: 16px;
  padding: 14px;
  color: var(--muted);
  background: rgba(244, 241, 234, 0.72);
  font-size: 13px;
}

.demo-box strong {
  color: var(--ink);
}