:root {
    /* Updated Color Palette */
    --color-primary: #2c3e50;
    --color-secondary: #8d9295;
    --color-accent: #2980b9;
    --color-background: #ffffff;  /* Changed from dark to white */
    --color-surface: #f8fafc;    /* Light surface color */
    --color-text: #2c3e50;       /* Changed to dark text */
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-surface-light: rgba(0, 0, 0, 0.05);
    --color-surface-lighter: rgba(0, 0, 0, 0.02);
    
    /* Updated Gradients */
    --gradient-surface: linear-gradient(
        to bottom right,
        rgba(0, 0, 0, 0.02),
        rgba(0, 0, 0, 0.05)
    );
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;

    /* Chart Colors */
    --color-chart-background: #ffffff;
    --color-chart-text: #2c3e50;
    --color-chart-border: rgba(0, 0, 0, 0.1);
}

/* Base Styles */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-surface);
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Form Elements */
.input-section {
    margin: 24px 0;
    padding: 20px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.select-group {
    margin: 20px 0;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--color-text-light);
    font-size: 0.875rem;
}

select {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: inherit;
    background: white;
    color: var(--color-text);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Add styles for Select2 dropdown */
.select2-container--default .select2-selection--single {
    background: rgba(155, 152, 152, 0.15) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: var(--color-text) !important;
}

.select2-container--default .select2-search--dropdown .select2-search__field {
    background: rgb(160, 155, 155) !important;
    color: #2c3e50 !important;  /* Dark text color for better visibility */
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
    padding: 8px !important;
    font-size: 1rem !important;
}

.select2-container--default .select2-results__option {
    background: white !important;
    color: #2c3e50 !important;  /* Dark text color */
    padding: 8px 12px !important;
}

.select2-container--default .select2-results__option--highlighted[aria-selected] {
    background: var(--color-accent) !important;
    color: white !important;
}

.select2-dropdown {
    background: white !important;
    border: 1px solid rgba(0, 0, 0, 0.1) !important;
    box-shadow: var(--shadow-lg) !important;
}

/* Buttons */
button {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    width: 100%;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

button:active {
    transform: translateY(0);
}

/* Results Section */
.results {
    margin-top: 32px;
    padding: 24px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--color-text);
}

/* Tables */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 24px 0;
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    overflow: hidden;
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    background: var(--color-surface);
    color: var(--color-text);
    font-weight: 600;
}

td {
    color: var(--color-text);
}

tr:hover {
    background: var(--color-surface-light);
}

/* Charts */
#results-chart, #results-pie-chart {
    margin: 24px 0;
    max-height: 300px;
    background: var(--color-chart-background);
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-chart-border);
}

/* Chart Text Styles */
.chart-container {
    background: var(--color-chart-background);
    color: var(--color-chart-text);
    padding: 16px;
    border-radius: var(--radius-md);
}

/* Update Distance Value */
#distance-value {
    color: var(--color-text);
    background: var(--color-surface-light);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

/* Chart Labels */
.chart-label {
    color: var(--color-chart-text);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Chart Tooltips */
.chart-tooltip {
    background: var(--color-chart-background) !important;
    border: 1px solid var(--color-chart-border) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--color-chart-text) !important;
    font-family: var(--font-sans) !important;
    font-size: 0.875rem !important;
    padding: 8px 12px !important;
    box-shadow: var(--shadow-md) !important;
}

/* Responsive Design */
@media (max-width: 640px) {
    .container {
        padding: 16px;
        margin: 8px;
    }
    
    button {
        padding: 14px 20px;
    }
    
    th, td {
        padding: 12px;
        font-size: 0.875rem;
    }
    
    .results {
        padding: 16px;
    }
    
    #results-chart, #results-pie-chart {
        background: var(--chart-background);
        padding: 16px;
        margin: 12px 0;
    }
    
    .chart-label {
        font-size: 0.75rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.results {
    animation: fadeIn var(--transition-normal);
}