:root { font-family: "Segoe UI", Tahoma, Arial, sans-serif; color: #1d2b3a; background: #e8eef5; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: linear-gradient(145deg, #dce8f4, #f6f8fa 56%, #d6e2ee); }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(410px, 100%); padding: 38px 40px 34px; border: 1px solid #a8b7c5; border-radius: 8px; background: #fff; box-shadow: 0 20px 55px #27435e2d; }
.logo { width: 54px; height: 54px; display: grid; place-items: center; border: 1px solid #245b92; border-radius: 8px; background: linear-gradient(145deg, #79b9e8, #2f6da8); color: white; font-weight: 800; }
.product { margin: 18px 0 4px; color: #2d659d; font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
h1 { margin: 0; font-size: 25px; }
.subtitle { margin: 7px 0 25px; color: #647587; font-size: 14px; line-height: 1.45; }
label { display: grid; gap: 6px; margin: 0 0 15px; color: #46586a; font-size: 13px; font-weight: 600; }
input { width: 100%; min-height: 42px; padding: 0 11px; border: 1px solid #8e9dac; border-radius: 4px; font: inherit; }
input:focus { outline: 3px solid #4487c62c; border-color: #397ebc; }
button { width: 100%; min-height: 43px; margin-top: 4px; border: 1px solid #245f98; border-radius: 4px; background: linear-gradient(#64a5dc, #3979b4); color: white; font: inherit; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
.error { margin: 0 0 12px; padding: 9px 10px; border: 1px solid #da8d8d; background: #fff0f0; color: #8f2929; font-size: 13px; }
@media (max-width: 480px) { .login-card { padding: 30px 24px; } }