:root {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #172033;
    background: #eef3f9;
}

* { box-sizing: border-box; }

body { margin: 0; min-height: 100vh; }

.login-pagina {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, .17), transparent 34%),
        linear-gradient(145deg, #eef4fb, #f8fafc);
}

.login-tarjeta {
    width: min(100%, 430px);
    padding: 36px;
    border: 1px solid rgba(148, 163, 184, .28);
    border-radius: 24px;
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 24px 65px rgba(15, 23, 42, .13);
}

.login-logo {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border-radius: 18px;
    background: #172554;
    color: white;
    font-weight: 800;
    letter-spacing: .06em;
}

.login-etiqueta {
    margin: 22px 0 6px;
    color: #2563eb;
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .09em;
    text-transform: uppercase;
}

h1 { margin: 0; font-size: clamp(1.8rem, 5vw, 2.35rem); }
.login-descripcion { margin: 10px 0 28px; color: #64748b; }

label {
    display: block;
    margin: 17px 0 7px;
    font-size: .92rem;
    font-weight: 700;
}

input {
    width: 100%;
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    outline: none;
    font: inherit;
    background: white;
}

input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .12);
}

.campo-password { position: relative; }
.campo-password input { padding-right: 76px; }
.campo-password button {
    position: absolute;
    right: 7px;
    top: 7px;
    height: 34px;
    border: 0;
    border-radius: 9px;
    padding: 0 10px;
    background: #e2e8f0;
    cursor: pointer;
    font-weight: 700;
}

.boton-login {
    width: 100%;
    min-height: 50px;
    margin-top: 24px;
    display: inline-grid;
    place-items: center;
    border: 0;
    border-radius: 13px;
    background: #172554;
    color: white;
    font: inherit;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}

.boton-login:hover { background: #1e3a8a; }

.mensaje {
    margin: 20px 0;
    padding: 13px 15px;
    border-radius: 12px;
    font-size: .92rem;
    line-height: 1.45;
}
.mensaje.error { background: #fee2e2; color: #991b1b; }
.mensaje.ok { background: #dcfce7; color: #166534; }
.mensaje.aviso { background: #fef3c7; color: #92400e; }

@media (max-width: 520px) {
    .login-pagina { padding: 14px; }
    .login-tarjeta { padding: 26px 20px; border-radius: 20px; }
}