/* css/distance-chart.css */

/* Page Title Style */
.content-container h2 {
    text-align: center;
    border-bottom: 2px solid var(--clr-header-border-bottom);
    margin-block: 2rem;
    font-size: var(--font-size-800);
}

.content-container h2 + p {
    background-color: var(--clr-bg);
    padding-block: .5rem;
    text-align: center;
    max-width: 60ch;
    margin-inline: auto;
    margin-top: -1.5rem; /* Pull it closer to the title */
    margin-bottom: 2rem;
    border-radius: 8px;
    font-size: var(--font-size-500);
    font-style: italic;
}

/* Unit Selector Styles */
.unit-selector,
.selection-summary-container,
.travel-time-container {
    background-color: var(--clr-table-row-even-bg);
    border: 2px solid var(--clr-highlight-col);
    border-radius: 8px;
    padding: 1rem;
    margin-block: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.unit-selector legend {
    font-weight: var(--font-weight-700);
    padding-inline: 0.5rem;
}

.unit-selector label {
    cursor: pointer;
    font-size: var(--font-size-400);
}

.unit-selector div {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.unit-selector fieldset { /* This is targeting the fieldset inside .unit-selector */
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    border: none; /* Remove default fieldset border */
    font-size: var(--font-size-400);
}

/* Container for the scrollable distance chart */
#distance-chart-container {
    background-color: var(--clr-bg);
    overflow-x: auto; /* Allow horizontal scrolling on all screen sizes */
    margin-block: 2rem;
    border: 2px solid var(--clr-highlight-col);
    border-radius: 8px;
    padding: 1rem;
}

/* Distance Chart Styles */
.distance-chart {
    border-collapse: collapse;
    font-size: var(--font-size-300);
}

.distance-chart th,
.distance-chart td {
    border: 1px solid var(--clr-border);
    padding: 8px 10px;
    text-align: center;
}

.distance-chart th:first-child {
    width: 250px; /* Give the first column a fixed, wider width */
}

.distance-chart thead th {
    background-color: var(--clr-table-header-bg);
    color: var(--clr-text-light);
    font-weight: var(--font-weight-700);
    white-space: normal; /* Allow header text to wrap */
    min-width: 90px; /* Set a minimum width for data columns */
    vertical-align: middle; /* Center text vertically */
}

.distance-chart tbody th {
    background-color: var(--clr-table-row-header-bg);
    text-align: left;
    font-weight: var(--font-weight-700);
}

.distance-chart .zero-distance {
    background-color: var(--clr-table-zero-bg); /* Light grey background for zero-distance cells */
    font-weight: var(--font-weight-700);
}

.distance-chart tbody tr:nth-child(even) {
    background-color: var(--clr-table-row-even-bg); /* Light tan for even rows for readability (papayawhip) */
}

.distance-chart tbody tr:nth-child(odd) {
    background-color: var(--clr-table-row-odd-bg);
}

/* --- Highlight styles for distance chart --- */
.distance-chart th[data-location-index] {
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

.distance-chart th[data-location-index]:focus {
    outline: 3px solid var(--clr-focus);
    outline-offset: -3px; /* Inset outline to stay within the cell */
}

/* Highlight style for the selected row */
.distance-chart .highlight-row {
    background-color: var(--clr-highlight-row); /* peachpuff */
}

/* Highlight style for the selected column */
.distance-chart .highlight-col {
    background-color: var(--clr-highlight-col); /* sandybrown */
}

/* The cell at the intersection gets the main highlight color */
.distance-chart .highlight-col.highlight-row {
    background-color: var(--stripe-clr-1);
    color: var(--stripe-clr-2);
}

/* --- Summary and Travel Time Styles --- */
.selection-summary-container, .travel-time-container {
    text-align: center; /* Center the content inside */
}

.selection-summary-container p {
    margin: 0.25rem 0;
    font-size: var(--font-size-500);
}

.selection-summary-container .distance-summary {
    font-weight: var(--font-weight-700);
    font-size: var(--font-size-600);
    color: var(--stripe-clr-1);
}

.placeholder-instructions {
    padding: 0.5rem;
    font-style: italic;
    color: var(--clr-text-primary);
    font-size: var(--font-size-400);
    text-align: left;
}

.placeholder-instructions p {
    font-weight: var(--font-weight-700);
    text-align: center;
    margin-bottom: 0.5rem;
}

.placeholder-instructions ol {
    margin-left: 2rem; /* Indent the list */
    max-width: 60ch;
}

/* When the travel time chart exists, align it to the top of its container */
.travel-time-container:has(.travel-time-chart) {
    justify-content: flex-start;
}

.travel-time-container .placeholder-text {
    font-style: italic;
    color: var(--clr-text-primary);
}

.travel-time-chart {
    border-collapse: collapse;
    width: 100%;
    max-width: 500px;
}

.travel-time-chart th,
.travel-time-chart td {
    border: 1px solid var(--clr-border);
    padding: 8px;
    text-align: left;
}

.travel-time-chart thead th {
    background-color: var(--clr-table-header-bg);
    color: var(--clr-text-light);
}