:root { font-family: system-ui, sans-serif; color: #203d38; background: #eef5f1; font-size: 18px; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(100%, 460px); padding: 32px; background: white; border: 1px solid #c2d7cb; border-radius: 20px; box-shadow: 0 12px 40px #173a2e12; }
h1 { font-size: 1.65rem; }
p { line-height: 1.7; }
form { display: grid; gap: 12px; }
input, button { width: 100%; padding: 13px; border: 1px solid #78988b; border-radius: 8px; font: inherit; }
button { margin-top: 12px; color: white; background: #176b55; cursor: pointer; }
input:focus-visible, button:focus-visible { outline: 3px solid #3982be; outline-offset: 3px; }
.hint { font-size: .9rem; color: #4d625b; }
.login-error { padding: 12px; border: 2px solid #a13729; color: #922b20; background: #fff2ed; }
@media (max-width: 400px) { body { padding: 12px; } .login-card { padding: 22px; } }