:root { font-family: -apple-system, BlinkMacSystemFont, "Noto Sans TC", "Microsoft JhengHei", sans-serif; color: #173c2a; background: #f2f6f2; color-scheme: light; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; display: grid; place-items: center; padding: 24px; background: radial-gradient(ellipse at top left, #e0efdf, transparent 65%); }
.login-card { width: min(100%, 420px); padding: 36px; background: white; border: 1px solid #d6e4d8; border-top: 5px solid #23814a; border-radius: 16px; box-shadow: 0 20px 60px #173c2a0c; }
.brand { width: 44px; height: 44px; display: grid; place-items: center; background: #e8f4e9; border-radius: 12px; font-size: 29px; font-weight: 700; color: #267a47; }
.eyebrow { font-size: 11px; letter-spacing: .12em; font-weight: 700; color: #52745e; margin: 22px 0 10px; }
h1 { margin: 0; font-size: 27px; letter-spacing: -.03em; }
.intro { font-size: 14px; color: #65766a; line-height: 1.8; margin: 12px 0 26px; }
label { display: block; font-size: 14px; font-weight: 600; margin: 16px 0 8px; }
input { font: inherit; font-size: 16px; padding: 12px; width: 100%; border: 1px solid #bacbbc; border-radius: 7px; background: #fbfdfb; }
input:focus-visible, button:focus-visible { outline: 3px solid #9dd4ad; outline-offset: 2px; }
button { cursor: pointer; margin-top: 24px; width: 100%; padding: 13px; background: #217743; color: white; font: inherit; font-weight: 700; border: 0; border-radius: 7px; }
button:hover { background: #195d34; } button:disabled { opacity: .65; cursor: wait; }
.error { color: #aa2935; padding: 10px; background: #fff0f0; border-radius: 6px; font-size: 13px; }
.footnote { font-size: 12px; line-height: 1.7; color: #748277; margin: 24px 0 0; text-align: center; }
@media(max-width: 440px) { body { padding: 18px; } .login-card { padding: 28px 24px; } }