body {
    background: linear-gradient(145deg, #f6f9fc 0%, #e9f1f8 100%);
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 20px 40px rgba(0, 20, 50, 0.15) !important;
}

.card-header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%) !important;
    border-bottom: none;
}

.form-control, .form-select {
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 16px;
    transition: all 0.25s ease;
    background-color: #fafcff;
    font-size: 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: #2a5298;
    box-shadow: 0 0 0 4px rgba(42, 82, 152, 0.15);
    background-color: #ffffff;
}

input[type="date"]::-webkit-inner-spin-button,
input[type="date"]::-webkit-calendar-picker-indicator {
    opacity: 0.6;
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: #dc3545;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.was-validated .form-control:invalid:focus,
.form-control.is-invalid:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 4px rgba(220, 53, 69, 0.15);
}

.invalid-feedback {
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 0.35rem;
}

.btn-primary {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 14px rgba(42, 82, 152, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 20px rgba(42, 82, 152, 0.35);
    background: linear-gradient(135deg, #152d57 0%, #1e3c72 100%);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(42, 82, 152, 0.3);
}

input[type="file"].form-control {
    padding: 10px 12px;
    background-color: #f8faff;
    cursor: pointer;
}

input[type="file"].form-control::file-selector-button {
    border-radius: 8px;
    border: none;
    padding: 8px 18px;
    background: #e9f1f8;
    color: #1e3c72;
    font-weight: 600;
    margin-right: 16px;
    transition: background 0.2s;
}

input[type="file"].form-control::file-selector-button:hover {
    background: #d0e0f0;
}

.alert-success {
    background: #e3f5e9;
    border: 1px solid #b7dfc9;
    border-radius: 16px;
    color: #0e4b2b;
    font-weight: 500;
}

@media (max-width: 768px) {
    .card-body {
        padding: 1.5rem !important;
    }
    
    .form-control, .form-select {
        font-size: 0.95rem;
        padding: 10px 14px;
    }

    .btn-primary {
        font-size: 1rem;
    }
}