body {
    background: linear-gradient(135deg, #f6f9fc 0%, #e0e7ef 100%);
}
.main-header {
    background: #fff;
    box-shadow: 0 2px 12px 0 rgba(31, 38, 135, 0.06);
    border-bottom: 1px solid #e0e7ef;
}
.logo-img {
    height: 48px;
    max-width: 180px;
    object-fit: contain;
}
.main-footer {
    background: #fff;
    color: #888;
    border-top: 1px solid #e0e7ef;
    font-size: 0.98rem;
    letter-spacing: 0.02em;
}
.card {
    border-radius: 1.7rem;
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.13);
    border: none;
}
.card-body {
    padding: 3rem 2.5rem;
}
h2 {
    color: #22223b;
    font-size: 2.2rem;
    letter-spacing: 0.01em;
}
h5 {
    color: #4a4e69;
    font-size: 1.25rem;
    border-left: 4px solid #4a4e69;
    padding-left: 0.7rem;
    margin-bottom: 1.2rem;
    background: linear-gradient(90deg, #f6f9fc 60%, #e0e7ef 100%);
}
.form-label {
    font-weight: 500;
    color: #3a3a3a;
}
input.form-control, select.form-select, textarea.form-control {
    border-radius: 0.85rem;
    border: 1.5px solid #d1d5db;
    background: #f9fafb;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-size: 1.05rem;
}
input.form-control:focus, select.form-select:focus, textarea.form-control:focus {
    border-color: #4a4e69;
    box-shadow: 0 0 0 0.15rem rgba(74,78,105,0.10);
}
.btn-dark {
    background: linear-gradient(90deg, #22223b 0%, #4a4e69 100%);
    border: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: 0.85rem;
    box-shadow: 0 2px 12px rgba(34,34,59,0.10);
    transition: background 0.2s, box-shadow 0.2s;
    font-size: 1.1rem;
    padding: 0.85rem 0;
}
.btn-dark:hover {
    background: linear-gradient(90deg, #4a4e69 0%, #22223b 100%);
    box-shadow: 0 4px 18px rgba(74,78,105,0.13);
}
.section-divider {
    border-top: 2px solid #e0e7ef;
    margin: 2.2rem 0 1.7rem 0;
}
::-webkit-input-placeholder { color: #b0b3c6; }
::-moz-placeholder { color: #b0b3c6; }
:-ms-input-placeholder { color: #b0b3c6; }
::placeholder { color: #b0b3c6; }
@media (max-width: 768px) {
    .card-body {
        padding: 1.2rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    h5 {
        font-size: 1.05rem;
        padding-left: 0.4rem;
    }
}