:root {
  color-scheme: light;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  color: #172321;
  background: #eef5f3;
}
* { box-sizing: border-box; }
body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(15, 143, 132, .16), transparent 32rem),
    linear-gradient(145deg, #f7fbfa 0%, #e8f1ef 100%);
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}
.login-card {
  width: min(100%, 420px);
  padding: 36px;
  border: 1px solid #c7d8d4;
  border-radius: 18px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 24px 64px rgba(24, 63, 57, .14);
}
.login-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  color: #fff;
  background: #078f84;
  font-size: 25px;
  font-weight: 800;
}
.eyebrow {
  margin: 24px 0 7px;
  color: #087e75;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1 { margin: 0; font-size: 30px; letter-spacing: -.03em; }
.description { margin: 12px 0 24px; color: #5b6c68; line-height: 1.65; }
form { display: grid; gap: 17px; }
label { display: grid; gap: 8px; font-size: 13px; font-weight: 700; }
input {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid #b9cbc7;
  border-radius: 9px;
  background: #fff;
  color: #172321;
  font: inherit;
  outline: none;
}
input:focus { border-color: #078f84; box-shadow: 0 0 0 3px rgba(7, 143, 132, .14); }
button {
  margin-top: 3px;
  padding: 13px 16px;
  border: 0;
  border-radius: 9px;
  color: #fff;
  background: #078f84;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
button:hover { background: #057a71; }
.login-error {
  padding: 11px 12px;
  border: 1px solid #efb8b2;
  border-radius: 8px;
  color: #9e2f27;
  background: #fff1ef;
  font-size: 13px;
}
.login-note { margin: 20px 0 0; color: #7b8c88; font-size: 12px; line-height: 1.55; }
@media (max-width: 520px) { .login-card { padding: 28px 22px; } }