:root {
  color: #1d211e;
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
  background: #f4f5f2;
  font-synthesis: none;
}

* { box-sizing: border-box; }
body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background-color: #f4f5f2;
  background-image: linear-gradient(#dde1dc 1px, transparent 1px), linear-gradient(90deg, #dde1dc 1px, transparent 1px);
  background-size: 54px 54px;
}

.login-shell { width: min(420px, calc(100% - 32px)); }
.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.brand-mark {
  display: grid; width: 44px; height: 44px; place-items: center;
  color: #fff; font-size: 21px; font-weight: 900; background: #ef5a47;
  border: 1px solid #c53f30; border-radius: 6px; box-shadow: 3px 3px 0 #8f2c22;
}
.login-brand div { display: grid; gap: 2px; }
.login-brand strong { font-size: 20px; }
.login-brand span:last-child { color: #667069; font: 700 9px ui-monospace, Consolas, monospace; }
.login-panel { padding: 28px; background: #fff; border: 1px solid #aeb6af; border-radius: 8px; box-shadow: 8px 8px 0 rgba(35, 43, 38, 0.12); }
.login-heading { display: flex; align-items: center; gap: 13px; margin-bottom: 25px; }
.login-icon { display: grid; width: 42px; height: 42px; place-items: center; color: #fff; background: #147b8c; border-radius: 6px; }
.login-icon svg { width: 21px; }
.login-heading p { margin: 0 0 4px; color: #c34535; font: 800 9px ui-monospace, Consolas, monospace; }
h1 { margin: 0; font-size: 23px; letter-spacing: 0; }
label { display: block; margin-top: 17px; }
label span { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 750; }
input { width: 100%; height: 44px; padding: 0 12px; color: #1d211e; background: #fff; border: 1px solid #aeb6af; border-radius: 6px; outline: 0; }
input:focus { border-color: #147b8c; box-shadow: 0 0 0 3px rgba(20, 123, 140, 0.13); }
.login-error { min-height: 21px; margin: 10px 0 5px; color: #b62d3b; font-size: 11px; line-height: 1.5; }
button { display: flex; width: 100%; height: 44px; align-items: center; justify-content: center; gap: 8px; color: #fff; font-size: 13px; font-weight: 800; background: #ef5a47; border: 1px solid #c53f30; border-radius: 6px; box-shadow: 3px 3px 0 #8f2c22; cursor: pointer; }
button:disabled { opacity: 0.6; box-shadow: none; cursor: wait; }
button svg { width: 17px; }
footer { display: flex; justify-content: center; gap: 7px; margin-top: 22px; color: #667069; font-size: 10px; }
footer svg { width: 14px; }
@media (max-width: 480px) { .login-panel { padding: 23px 20px; } }