:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; background: #edf2f4; color: #18232a; display: grid; place-items: center; }
.login-shell { width: min(100% - 32px, 380px); padding: 32px; border: 1px solid #cbd6db; background: white; border-radius: 6px; box-shadow: 0 12px 36px #1a343c14; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; color: #fff; background: #166b71; border-radius: 6px; font-size: 22px; font-weight: 700; }
h1 { font-size: 23px; margin: 24px 0 2px; }
.subtitle { margin: 0 0 28px; color: #65727a; }
form { display: grid; gap: 8px; }
label { font-size: 13px; font-weight: 600; margin-top: 9px; }
input { width: 100%; min-height: 46px; border: 1px solid #aebdc3; border-radius: 5px; padding: 10px 12px; font: inherit; }
input:focus-visible, button:focus-visible { outline: 3px solid #82c7cb; outline-offset: 1px; }
button { width: 100%; min-height: 46px; margin-top: 20px; border: 0; border-radius: 5px; background: #166b71; color: white; font: inherit; font-weight: 650; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
.error { margin: 12px 0 0; color: #a52630; font-size: 13px; }
@media (max-width: 480px) { .login-shell { padding: 28px 22px; } }