/* Estilos responsive para login */
:root{
    --bg:#f4f6f8;
    --card:#ffffff;
    --accent:#0d6efd;
    --radius:14px;
    --pad:20px;
}

*{box-sizing:border-box}

body{
    margin:0;
    font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background: linear-gradient(180deg, #f7f9fb 0%, var(--bg) 100%);
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
}

.login-page{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:24px;
}

/* Card */
.login-card{
    width:100%;
    max-width:420px;
    background:var(--card);
    border-radius:var(--radius);
    padding:26px;
    box-shadow: 0 8px 30px rgba(20,30,50,0.08);
    border: 1px solid rgba(15,20,30,0.04);
    text-align:left;
}

/* Logo */
.login-card .logo{
    font-weight:700;
    font-size:20px;
    color:var(--accent);
    text-align:center;
    margin-bottom:12px;
}

/* Heading */
.login-card h2{
    font-size:1.25rem;
    margin:0 0 14px;
    text-align:center;
}

/* Form */
.form-group{ margin-bottom:12px; }
.form-control{
    height:44px;
    padding:10px 12px;
    border-radius:10px;
    border:1px solid rgba(15,20,30,0.08);
    background: #fff;
    transition: box-shadow .15s, border-color .15s;
    font-size:0.95rem;
}
.form-control:focus{
    outline:none;
    box-shadow:0 6px 18px rgba(13,110,253,0.08);
    border-color: rgba(13,110,253,0.35);
}

/* Input group button */
.input-group{ display:flex; gap:8px; align-items:center; }
.input-group .btn{
    border-radius:10px;
    padding:8px 10px;
    height:44px;
}

/* Submit */
.btn-login{
    height:48px;
    border-radius:10px;
    font-weight:600;
}

/* Small text */
.login-card small{ font-size:0.85rem; }

/* Responsive tweaks */
@media (max-width:420px){
    .login-card{ padding:18px; border-radius:12px; }
    .login-card h2{ font-size:1.1rem; }
}

/* Accessibility focus */
.form-control:focus, .btn:focus { box-shadow: 0 6px 18px rgba(13,110,253,0.12); }

/* Darken button on hover */
.btn-login:hover{ filter:brightness(.98); }

/* improve invalid feedback visibility */
.was-validated .form-control:invalid { border-color: #dc3545; box-shadow: none; }
.was-validated .form-control:invalid + .invalid-feedback { display:block; }