:root {
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: #f3f7f2;
  color: #18362b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(151, 196, 143, 0.24), transparent 34rem),
    linear-gradient(145deg, #f7faf5, #e8f1e8);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(100%, 430px);
  padding: 38px;
  border: 1px solid rgba(42, 91, 69, 0.14);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 70px rgba(36, 74, 56, 0.14);
}

.brand-mark {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: #1f6b4e;
  color: white;
  font: 700 24px/1 serif;
}

.eyebrow {
  margin: 22px 0 7px;
  color: #4d7a67;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

h1 { margin: 0; font-size: 30px; }
.intro { margin: 10px 0 28px; color: #667a70; }
form { display: grid; gap: 18px; }
label { display: grid; gap: 8px; font-weight: 700; }

input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid #c9d9cf;
  border-radius: 12px;
  background: white;
  color: #18362b;
  font: inherit;
  outline: none;
}

input:focus { border-color: #2b7b5d; box-shadow: 0 0 0 4px rgba(43, 123, 93, 0.12); }

button {
  min-height: 48px;
  border: 0;
  border-radius: 12px;
  background: #1f6b4e;
  color: white;
  font: 700 16px/1 inherit;
  cursor: pointer;
}

button:disabled { opacity: 0.65; cursor: wait; }
.notice { min-height: 22px; margin: -4px 0 0; color: #a33a2b; font-size: 14px; }

@media (max-width: 520px) {
  .login-card { padding: 28px 22px; border-radius: 20px; }
}