:root {
  color-scheme: light;
  --bg: #faf8f5;
  --ink: #302c29;
  --muted: #80766d;
  --line: #e7e1d9;
  --accent: #9c4a38;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 14px/1.6 var(--sans); }
[hidden] { display: none !important; }
.login-page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: max(40px, env(safe-area-inset-top)) 24px max(28px, env(safe-area-inset-bottom));
}
.login-card { width: 100%; max-width: 420px; padding: 38px 38px 40px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.login-heading { text-align: center; }
.login-heading img { display: block; margin: 0 auto 18px; }
.login-heading h1 { margin: 0; font: 600 32px/1.4 var(--serif); letter-spacing: 2px; }
.login-heading p { margin: 10px 0 0; color: var(--muted); font-size: 13px; letter-spacing: 1px; }
.login-introduction { margin: 28px 0 24px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; font-size: 13px; }
.field + .field { margin-top: 18px; }
.field label { display: block; margin-bottom: 7px; color: #665c53; font-size: 13px; }
.field input { width: 100%; min-height: 46px; border: 1px solid #ded5cb; border-radius: 5px; padding: 10px 12px; background: #fff; color: var(--ink); font: 16px/1.5 var(--sans); -webkit-appearance: none; appearance: none; }
.field input:read-only { background: var(--bg); }
button { width: 100%; min-height: 46px; margin-top: 26px; padding: 10px 16px; border: 1px solid var(--accent); border-radius: 5px; background: var(--accent); color: #fff; font: 500 15px/1.5 var(--sans); cursor: pointer; touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
button:hover { background: #813c2d; border-color: #813c2d; }
button:disabled { opacity: .65; cursor: wait; }
input:focus-visible, button:focus-visible { outline: 3px solid #b96b4b66; outline-offset: 3px; }
.login-error { margin: 18px 0 0; padding: 10px 12px; border: 1px solid #e3b3a2; border-radius: 5px; background: #fbece6; color: #933b2d; font-size: 13px; overflow-wrap: anywhere; }
.login-footer { margin-top: 26px; text-align: center; color: #796b5f; font: 14px/1.8 var(--serif); letter-spacing: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 480px) {
  .login-page { padding-left: 20px; padding-right: 20px; }
  .login-card { padding: 32px 24px; }
  .login-heading h1 { font-size: 29px; }
  .login-heading p { letter-spacing: .5px; }
  .login-footer { font-size: 12px; letter-spacing: 1px; }
}