:root { --navy: #102b46; --blue: #1f5d8e; --line: #d5e1e9; --muted: #657786; }
* { box-sizing: border-box; }
body { margin: 0; color: #1c2c39; font-family: "Segoe UI", Arial, sans-serif; }
.pagina-login { display: grid; min-height: 100vh; place-items: center; padding: 24px; background: radial-gradient(circle at 78% 12%, #377da8, transparent 25%), linear-gradient(125deg, #091d31, #163c59); }
.painel-login { width: min(100%, 420px); padding: 36px; border: 1px solid rgba(255,255,255,.42); border-radius: 16px; background: rgba(255,255,255,.98); box-shadow: 0 22px 50px rgba(0,0,0,.25); }
.marca-login { display: inline-block; padding: 6px 9px; border-radius: 5px; background: var(--navy); color: #fff; font-size: .78rem; font-weight: 850; letter-spacing: .15em; }
.sobretitulo-login { margin: 22px 0 7px; color: var(--blue); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
h1 { margin: 0; color: var(--navy); font-size: 1.8rem; letter-spacing: -.03em; }
.descricao-login { margin: 9px 0 23px; color: var(--muted); font-size: .9rem; line-height: 1.5; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; color: #3f5365; font-size: .8rem; font-weight: 750; }
input { min-height: 43px; padding: 0 11px; border: 1px solid var(--line); border-radius: 8px; color: #1d2d3a; font: inherit; }
input:focus { outline: 3px solid rgba(45,124,174,.15); border-color: #5b9ac3; }
button { min-height: 43px; border: 0; border-radius: 8px; background: var(--navy); color: #fff; font: inherit; font-size: .87rem; font-weight: 800; cursor: pointer; }
button:hover { background: #0a2035; }
.aviso-login { margin-bottom: 15px; padding: 10px 11px; border-radius: 7px; font-size: .82rem; font-weight: 650; }
.aviso-login.erro { background: #fff0ee; color: #963c2c; }
.aviso-login.sucesso { background: #ecf8f0; color: #176a43; }

@media (max-width: 420px) {
    .pagina-login { padding: 14px; place-items: start center; }
    .painel-login { margin-top: 7vh; padding: 27px 21px; border-radius: 13px; }
    h1 { font-size: 1.58rem; }
    input { font-size: 16px; }
}