:root {
    --primary-color: #5b47fb;
    --primary-dark: #4a38e0;
    --primary-light: #8678fc;
    --primary-very-light: #f4f2ff;
    --dark: #333333;
    --light: #f8f9fa;
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --danger: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f9f9fb;
    color: var(--dark);
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 600;
    letter-spacing: 0.5px;
}

.nav-link {
    font-weight: 500;
    margin: 0 5px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-link.active, .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.btn-primary {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
    box-shadow: 0 0 0 0.25rem rgba(91, 71, 251, 0.3) !important;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 0.25rem rgba(91, 71, 251, 0.2);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed #ccc;
    border-radius: 10px;
    padding: 5px;
    text-align: center;
    margin-bottom: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: white;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.upload-zone:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(91, 71, 251, 0.1);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* Settings Panel */
.settings {
    border: 1px solid #e7e7e7;
    border-radius: 10px;
    padding: 0;
    margin-bottom: 20px;
    background-color: white;
    overflow: hidden;
}

.settings-header {
    background-color: var(--primary-very-light);
    padding: 15px;
    border-bottom: 1px solid #e7e7e7;
}

#interpolation-settings, #volume-settings {
    padding: 20px;
}

/* File List */
.file-list {
    max-height: 300px;
    overflow-y: auto;
    border-radius: 0 0 10px 10px;
}

.file-list .list-group-item {
    border-left: none;
    border-right: none;
    transition: background-color 0.2s ease;
}

.file-list .list-group-item:first-child {
    border-top: none;
}

.file-list .list-group-item:hover {
    background-color: var(--primary-very-light);
}

.file-progress {
    height: 4px;
    margin-top: 8px;
    background-color: #f0f0f0;
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.card-header {
    background-color: white;
    border-bottom: 1px solid #e7e7e7;
    padding: 15px 20px;
}

.shadow-sm {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08) !important;
}

.shadow {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;
}

/* Alerts & Notes */
.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.note {
    background-color: var(--primary-very-light);
    padding: 10px;
    border-radius: 8px;
    color: var(--primary-dark);
}

/* Tables */
.preview-table {
    font-size: 0.9rem;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: var(--primary-very-light);
}

.table {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

/* Progress Bar */
.progress {
    border-radius: 10px;
    overflow: hidden;
    background-color: #e9ecef;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    background-color: var(--primary-color);
}

/* Footer */
.footer {
    background-color: white;
    border-top: 1px solid #e7e7e7;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Other Components */
.badge {
    font-weight: 500;
    padding: 5px 8px;
}

.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.btn-success {
    background-color: var(--success);
    border-color: var(--success);
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .card-header {
        flex-direction: column;
        align-items: flex-start !important;
    }
    
    .card-header div {
        margin-top: 10px;
        width: 100%;
    }
    
    #results-container .input-group {
        margin-bottom: 10px;
        width: 100%;
    }
    
    #download-all-btn {
        width: 100%;
    }
}