body {
    font-family: 'Inter', sans-serif;
    background: #0f2b46;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
}
.card-box {
    max-width: 420px;
    width: 100%;
    margin: 20px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
    overflow: hidden;
}
.card-head {
    background: linear-gradient(135deg,#0f2b46,#1c4a72);
    color: #fff;
    padding: 24px;
    text-align: center;
}
.card-head i {
    font-size: 32px;
    margin-bottom: 8px;
    display: block;
}
.card-head h2 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}
.card-head p {
    font-size: 12px;
    opacity: .8;
    margin: 4px 0 0;
}
.card-body {
    padding: 28px;
}
.form-control {
    border-radius: 8px;
    border: 1.5px solid #dce4ed;
    font-size: 13px;
    padding: 10px 12px;
}
.form-control:focus {
    border-color: #0f2b46;
    box-shadow: 0 0 0 3px rgba(15,43,70,0.12);
}
.form-label {
    font-weight: 500;
    color: #1a3a5c;
    font-size: 12px;
    margin-bottom: 5px;
}
.btn-submit {
    background: #0f2b46;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px;
    font-weight: 500;
    width: 100%;
    font-size: 13px;
}
.btn-submit:hover {
    background: #1c4a72;
    color: #fff;
}
.alert-custom {
    border-radius: 8px;
    font-size: 12.5px;
    padding: 12px 14px;
    margin-bottom: 16px;
}
.back-link {
    text-align: center;
    margin-top: 18px;
    font-size: 12.5px;
}
.back-link a {
    color: #0f2b46;
    text-decoration: none;
    font-weight: 500;
}
.back-link a:hover {
    text-decoration: underline;
}