body {
    background-color: #f5f5f5;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    padding-bottom: 2rem;
}

html {
    scroll-behavior: smooth;
}

.card {
    border: 1px solid #e0e0e0;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 0.4s ease-out;
}

.card-header {
    background-color: #ffffff;
    border-bottom: 2px solid #e0e0e0;
    padding: 1.25rem 1.5rem;
}

.card-header h4 {
    color: #212529;
    font-weight: 600;
}

.card-body {
    background-color: #ffffff;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

#countryList {
    max-height: 600px;
    overflow-y: auto;
    padding: 0.75rem;
    background-color: #fafafa;
    border: 1px solid #e0e0e0;
    border-radius: 0.375rem;
    margin-bottom: 0.75rem;
}

#countryList::-webkit-scrollbar {
    width: 8px;
}

#countryList::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

#countryList::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

#countryList::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.form-check-compact {
    padding: 0.25rem 0.5rem;
    margin-bottom: 0.15rem;
    transition: background-color 0.1s;
    border-radius: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.form-check-compact:hover {
    background-color: #e9ecef;
}

.form-check-compact .form-check-input {
    width: 1rem;
    height: 1rem;
    margin: 0;
    cursor: pointer;
    flex-shrink: 0;
    position: relative;
}

.form-check-compact .form-check-label {
    cursor: pointer;
    user-select: none;
    font-size: 0.75rem;
    padding: 0;
    margin: 0;
    font-family: 'Courier New', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    flex: 1;
    min-width: 0;
}

#countryList .col-lg-2,
#countryList .col-md-3,
#countryList .col-sm-4,
#countryList .col-6 {
    padding: 0.15rem;
}

#countryList .form-check {
    padding-left: 0;
    min-height: auto;
}

.form-label {
    color: #495057;
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.form-select,
.form-control {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-select:focus,
.form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-select-lg {
    padding: 0.75rem 1rem;
    font-size: 1.05rem;
}

.form-switch {
    padding-left: 0;
    min-height: auto;
}

.form-switch .form-check-input {
    width: 3rem;
    height: 1.5rem;
    margin-left: 0;
    margin-right: 1rem;
    float: left;
    cursor: pointer;
}

.form-switch .form-check-label {
    display: inline-block;
    padding-left: 0;
    padding-top: 0.125rem;
}

.aggregate-card {
    background-color: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 0.375rem;
    padding: 1rem;
}

.aggregate-card .form-check {
    padding: 0;
    margin-bottom: 0;
}

.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(13, 110, 253, 0.3);
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1.125rem;
}

.btn-outline-primary {
    color: #0d6efd;
    border-color: #0d6efd;
}

.btn-outline-primary:hover {
    background-color: #0d6efd;
    border-color: #0d6efd;
    color: white;
}

.btn-outline-secondary {
    color: #6c757d;
    border-color: #6c757d;
}

.btn-outline-secondary:hover {
    background-color: #6c757d;
    border-color: #6c757d;
    color: white;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

.alert {
    border-radius: 0.5rem;
    border: none;
    padding: 1rem 1.25rem;
}

.alert i {
    font-size: 1.1rem;
    vertical-align: middle;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.progress {
    border-radius: 0.5rem;
    background-color: #e9ecef;
    overflow: hidden;
}

.progress-bar {
    font-size: 0.95rem;
    font-weight: 500;
}

.navbar {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
    color: #212529;
}

.navbar-brand img {
    max-height: 30px;
}

.footer {
    background-color: #ffffff;
    border-top: 1px solid #e0e0e0;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

.footer a {
    color: #0d6efd;
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover {
    color: #0a58ca;
    text-decoration: underline;
}

.modal-xl {
    max-width: 90%;
}

#previewContent {
    background-color: #282c34 !important;
    color: #abb2bf !important;
    padding: 1.5rem;
    border-radius: 0.375rem;
    font-family: 'Courier New', Consolas, Monaco, monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    max-height: 70vh;
    overflow: auto;
    white-space: pre;
    word-wrap: normal;
    display: block !important;
}

.modal-body {
    padding: 1.5rem;
}

.modal-body pre {
    margin-bottom: 0;
    background-color: transparent;
}

.modal-body pre code {
    display: block;
    background-color: #282c34;
    color: #abb2bf;
}

#previewContent::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

#previewContent::-webkit-scrollbar-track {
    background: #21252b;
}

#previewContent::-webkit-scrollbar-thumb {
    background: #4b5263;
    border-radius: 5px;
}

#previewContent::-webkit-scrollbar-thumb:hover {
    background: #5c6370;
}

.api-header-get {
    background-color: #e7f3ff;
    border-left: 4px solid #0dcaf0;
    cursor: pointer;
    transition: background-color 0.2s;
}

.api-header-get:hover {
    background-color: #d1ecf1;
}

.api-header-post {
    background-color: #d4edda;
    border-left: 4px solid #198754;
    cursor: pointer;
    transition: background-color 0.2s;
}

.api-header-post:hover {
    background-color: #c3e6cb;
}

.api-path {
    font-size: 1rem;
    font-weight: 600;
    color: #212529;
}

.api-endpoint pre {
    background-color: #282c34;
    color: #abb2bf;
    padding: 1rem;
    border-radius: 0.375rem;
    overflow-x: auto;
    margin-bottom: 0;
}

.api-endpoint pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

.api-endpoint .text-success {
    color: #98c379 !important;
}

.api-endpoint .text-warning {
    color: #e5c07b !important;
}

.api-endpoint .text-info {
    color: #61afef !important;
}

.api-endpoint .text-danger {
    color: #e06c75 !important;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (min-width: 1400px) {
    #countryList .col-lg-2 {
        flex: 0 0 12.5%;
        max-width: 12.5%;
    }
}

@media (max-width: 1199px) {
    #countryList .col-lg-2 {
        flex: 0 0 16.666%;
        max-width: 16.666%;
    }
}

@media (max-width: 991px) {
    #countryList .col-md-3 {
        flex: 0 0 20%;
        max-width: 20%;
    }
}

@media (max-width: 767px) {
    .card-body {
        padding: 1.5rem !important;
    }
    
    #countryList {
        max-height: 300px;
    }
    
    #countryList .col-sm-4 {
        flex: 0 0 25%;
        max-width: 25%;
    }
    
    .form-check-compact .form-check-label {
        font-size: 0.75rem;
    }
    
    .form-select-lg,
    .btn-lg {
        font-size: 1rem;
        padding: 0.75rem 1.25rem;
    }
    
    .navbar-brand {
        font-size: 1rem;
    }
    
    .modal-xl {
        max-width: 95%;
    }
}

@media (max-width: 575px) {
    #countryList .col-6 {
        flex: 0 0 33.333%;
        max-width: 33.333%;
    }
}

@media (max-width: 399px) {
    #countryList .col-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

#variantDescription {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}