:root{color-scheme:light;--navy:#10233f;--blue:#1c62a7;--gold:#e9b949;--ink:#16243a;--muted:#607086;--line:#dbe4ef;--danger:#b42318}
*{box-sizing:border-box}
html,body{min-height:100%;margin:0}
body{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(145deg,#eef5fc 0%,#f8fbff 45%,#f6efe3 100%);display:grid;place-items:center;padding:24px}
.login-shell{width:min(100%,440px)}
.login-card{background:rgba(255,255,255,.96);border:1px solid rgba(219,228,239,.9);border-radius:24px;padding:clamp(26px,6vw,42px);box-shadow:0 24px 70px rgba(16,35,63,.15)}
.brand{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:30px;color:var(--navy)}
.brand-mark{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--navy);color:#fff;font:700 28px Georgia,serif;box-shadow:inset 0 -4px 0 var(--gold)}
.brand strong,.brand small{display:block}.brand strong{font-size:22px;letter-spacing:.12em}.brand small{font-size:12px;color:var(--muted);letter-spacing:.08em}
h1{margin:0;text-align:center;font-size:clamp(27px,7vw,36px);color:var(--navy)}
.intro{text-align:center;color:var(--muted);line-height:1.55;margin:10px 0 28px}
label{display:block;margin:0 0 8px;font-weight:700;font-size:14px}
.field{margin-bottom:18px}
input{width:100%;min-height:50px;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font:inherit;color:var(--ink);background:#fff;outline:none;transition:.2s}
input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(28,98,167,.12)}
button{width:100%;min-height:52px;border:0;border-radius:12px;padding:12px 18px;background:var(--navy);color:#fff;font:700 16px inherit;cursor:pointer;transition:transform .15s,background .2s}
button:hover{background:var(--blue)}button:active{transform:translateY(1px)}
.error{min-height:22px;margin:10px 0 0;color:var(--danger);font-weight:650;text-align:center;font-size:14px}
.note{margin:24px 0 0;padding-top:20px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:12px;line-height:1.5}
@media (max-width:520px){body{padding:14px}.login-card{border-radius:18px}.brand{margin-bottom:24px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}