:root {
  color-scheme: light;
  font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  color: #17221d;
  background: #ededed;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; display: grid; place-items: center; padding: 22px; }
.login-card {
  width: min(100%, 400px); padding: 36px; background: white; border-radius: 16px;
  box-shadow: 0 18px 55px rgba(26, 51, 38, .14);
}
.brand-mark {
  width: 48px; height: 48px; display: grid; place-items: center; background: #07c160;
  color: #072714; border-radius: 14px 14px 14px 5px; font-weight: 800; font-size: 21px;
}
h1 { margin: 22px 0 8px; font-size: 24px; }
.intro { margin: 0 0 28px; color: #626d66; font-size: 14px; line-height: 1.6; }
label { display: block; margin-bottom: 9px; font-size: 14px; }
input, button { font: inherit; width: 100%; border-radius: 10px; padding: 12px; }
input { border: 1px solid #dfe6e2; outline: none; color: #17221d; background: #ffffff; color-scheme: light; }
input:focus { border-color: #07c160; box-shadow: 0 0 0 3px rgba(7,193,96,.12); }
button { margin-top: 18px; background: #07c160; border: 0; color: #052813; font-weight: 700; cursor: pointer; }
button:hover { background: #08ad58; }
button:disabled { opacity: .6; cursor: wait; }
#loginStatus { margin: 14px 0 0; min-height: 22px; color: #a23a2e; font-size: 13px; line-height: 1.6; }
@media (max-width: 480px) { body { padding: 20px; } .login-card { padding: 28px 24px; box-shadow: 0 8px 28px rgba(26,51,38,.08); } }