:root {
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #102b28;
  background: #f4f0e7;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
button, input { font: inherit; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at 20% 10%, #d8f0df 0, transparent 34%), #f4f0e7; }
.login-card { width: min(100%, 430px); padding: clamp(30px, 7vw, 52px); background: #fffdf8; border: 1px solid rgba(16,43,40,.12); box-shadow: 0 28px 80px rgba(16,43,40,.14); }
.brand-mark { width: 46px; height: 46px; display: grid; place-items: center; background: #123c37; color: #b8f2d0; font-family: serif; font-size: 21px; transform: rotate(-3deg); }
.eyebrow { margin: 28px 0 8px; color: #3e7269; font-size: 11px; font-weight: 800; letter-spacing: .25em; }
h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(30px, 8vw, 42px); font-weight: 500; }
.intro { margin: 12px 0 30px; color: #64736f; line-height: 1.7; }
form { display: grid; gap: 10px; }
label { margin-top: 8px; font-size: 13px; font-weight: 750; }
input { width: 100%; height: 50px; padding: 0 14px; border: 1px solid #cbd4cf; border-radius: 2px; background: white; color: #102b28; outline: none; }
input:focus { border-color: #247864; box-shadow: 0 0 0 3px rgba(36,120,100,.12); }
button { height: 52px; margin-top: 14px; border: 0; border-radius: 2px; background: #123c37; color: white; font-weight: 800; cursor: pointer; }
button:hover { background: #1c554d; }
button:disabled { opacity: .6; cursor: wait; }
.error { margin: 7px 0 0; padding: 10px 12px; background: #fff0ee; color: #a83d36; font-size: 13px; }
.note { margin: 22px 0 0; color: #7a8884; font-size: 12px; text-align: center; }