/* BACKGROUND PREMIUM */
.auth {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 100px 20px;
    min-height: 80vh;
    background: linear-gradient(135deg, #1e3a8a, #1e40af);
}

/* BOX */
.auth-box {
    background: #fff;
    padding: 35px;
    border-radius: 18px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    text-align: center;
}

/* TITLE */
.auth-box h2 {
    margin-bottom: 8px;
    font-size: 24px;
}

.auth-box p {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 25px;
}

/* FORM */
.form-group {
    text-align: left;
    margin-bottom: 15px;
}

.form-group label {
    font-size: 13px;
    margin-bottom: 5px;
    display: block;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid #d1d5db;
    transition: 0.3s;
}

/* FOCUS EFFECT */
.form-group input:focus {
    border-color: #1e3a8a;
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15);
    outline: none;
}

/* BUTTON */
.auth .btn-primary {
    width: 100%;
    margin-top: 10px;
    padding: 14px;
    font-size: 15px;
}

/* FOOTER */
.auth-footer {
    margin-top: 18px;
    font-size: 13px;
}

.auth-footer a {
    color: #1e3a8a;
    font-weight: 600;
    text-decoration: none;
}

.back-home {
    display: inline-block;
    margin-bottom: 20px;
    font-size: 13px;
    text-decoration: none;
    color: #1e3a8a;
    font-weight: 600;
    background: #f3f4f6;
    padding: 6px 12px;
    border-radius: 8px;
    transition: 0.3s;
}

.back-home:hover {
    background: #1e3a8a;
    color: #fff;
}

.button-login {
    display: inline-block;
    margin-bottom: 20px;
    font-size: 25px;
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    background: #1e3a8a;
    padding: 6px 12px;
    border-radius: 8px;
    transition: 0.3s;
}

.button-login:hover {
    background: #1e3a8a;
    color: yellow;
}

.is-invalid {
    border: 1px solid red;
    background: #fff5f5;
}