/* Page transition overlay */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.page-transition.fade-out {
    opacity: 1;
    pointer-events: all;
}

.page-transition.fade-in {
    opacity: 1;
    animation: fadeIn 0.2s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 1; }
    to { opacity: 0; }
}

:root {
    /* Layout dimensions */
    --header-height: 52px;
    --filter-col-width: 185px;
    --results-header-height: auto;

    /* Spacing */
    --gap-sm: 6px;
    --gap-md: 16px;
    --gap-lg: 24px;

    /* Colors - Blue theme */
    --primary-blue: #1a365d;
    --accent-blue: #0066cc;
    --light-bg: #f7fafc;
    --results-bg: #edf2f7;
    --border-color: #cbd5e0;
    --text-dark: #1a202c;
    --text-muted: #718096;
}

html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100%;
    background-color: #fff;
}

body {
    font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-weight: 500;
}

a,
a:visited,
a:hover,
a:focus,
a:active {
    text-decoration: none;
}

/* ========================================
   APP CONTAINER - Full viewport
   ======================================== */

#app-container {
    display: grid;
    grid-template-rows: var(--header-height) 1fr;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ========================================
   HEADER
   ======================================== */

#app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px var(--gap-lg);
    border-bottom: 3px solid var(--primary-blue);
    background: linear-gradient(135deg, #fff 0%, #f8fafc 100%);
}

#updated-date {
    font-size: 11px;
    font-style: italic;
    color: var(--text-muted);
    align-self: flex-start;
    padding-top: 4px;
}

#title h1 {
    font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 30px;
    font-weight: 800;
    margin: 0;
    line-height: 1;
    color: #000;
    letter-spacing: -0.5px;
}

#title {
    display: flex;
    align-items: center;
    gap: 20px;
}

.title-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

#nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-left: 20px;
    border-left: 3px solid var(--primary-blue);
    align-self: center;
    height: 26px;
    margin-top: 6px;
}

#nav-links a {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: color 0.2s ease;
    padding: 4px 10px;
    border-radius: 4px;
}

#nav-links a:hover {
    color: var(--accent-blue);
    background-color: rgba(26, 54, 93, 0.05);
}

#nav-links a.active {
    color: var(--primary-blue);
    font-weight: 700;
    pointer-events: none;
    cursor: default;
}

#nav-links a.active:hover {
    color: var(--primary-blue);
    background-color: transparent;
}

/* ========================================
   MAIN CONTENT - Filter Zone + Results Zone
   ======================================== */

#main-content {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto 1fr;
    column-gap: var(--gap-lg);
    row-gap: 4px;
    height: 100%;
    overflow: hidden;
    padding: var(--gap-sm);
    box-sizing: border-box;
    background-color: #fff;
}

/* Full-width time chart spanning both columns */
#time-chart-row {
    grid-column: 1 / -1;
    grid-row: 1;
    border-bottom: 1px solid var(--border-color);
}

/* ========================================
   FILTER ZONE (Left side - 2 columns)
   ======================================== */

#filter-zone {
    display: grid;
    grid-template-columns: var(--filter-col-width) var(--filter-col-width);
    grid-template-rows: 1fr;
    gap: var(--gap-sm);
    padding: var(--gap-sm);
    grid-row: 2;
    height: 100%;
    overflow: hidden;
    box-sizing: border-box;
    background-color: #fff;
}

/* Left column: presidency + clemency stacked, scrolls as a unit if needed */
#filter-col-left {
    display: flex;
    flex-direction: column;
    gap: var(--gap-sm);
    overflow-y: auto;
    min-height: 0;
}

/* Filter columns */
.filter-column {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

/* District fills the full column height and scrolls internally */
#filter-col-district {
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

#filter-col-district > div {
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Chart containers */
#chart-president_term,
#chart-clemency_type {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#chart-district {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.chart-title {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chart-title-text {
    /* inherits from .chart-title */
}

.chart-title-count {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
    text-transform: none;
    letter-spacing: 0;
    min-width: 30px;
    text-align: right;
}

.chart-scroll {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* Search inputs in filter columns */
.chart-search-container {
    position: relative;
    margin-bottom: var(--gap-sm);
    flex-shrink: 0;
}

.chart-search {
    width: 100%;
    padding: 6px 28px 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
    font-family: inherit;
    box-sizing: border-box;
}

.chart-search:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.chart-search::placeholder {
    color: var(--text-muted);
}

.chart-search-icon {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 18px;
    pointer-events: none;
}

.chart-search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    padding: 0;
    line-height: 1;
    display: none;
}

.chart-search-clear:hover {
    color: var(--text-dark);
}

.chart-search:not(:placeholder-shown) ~ .chart-search-icon,
.chart-search-container.has-selection .chart-search-icon {
    display: none;
}

.chart-search:not(:placeholder-shown) ~ .chart-search-clear,
.chart-search-container.has-selection .chart-search-clear {
    display: block;
}

.chart-search.has-selection {
    border: 2px solid var(--primary-blue);
    background-color: #fff;
}

.chart-search-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 4px 4px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.chart-search-item {
    padding: 8px 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #eee;
}

.chart-search-item:last-child {
    border-bottom: none;
}

.chart-search-item:hover,
.chart-search-item.selected {
    background-color: rgba(43, 108, 176, 0.1);
}

.chart-search-item .item-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    padding-right: 10px;
}

.chart-search-item .item-count {
    color: var(--text-muted);
    font-size: 12px;
    flex-shrink: 0;
}

/* ========================================
   RESULTS ZONE (Right side)
   ======================================== */

#results-zone {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    background-color: var(--results-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

#results-header {
    padding: var(--gap-sm) var(--gap-lg);
    background-color: var(--results-bg);
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0;
    flex-shrink: 0;
}

#results-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--gap-md);
}

#menu-info {
    display: flex;
    align-items: center;
    gap: var(--gap-sm);
    white-space: nowrap;
}

#menu-info .record-count {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
}

#menu-info .record-filters {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-muted);
}

#filters {
    max-height: 120px;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

#filters:empty,
#filters.no-filters {
    max-height: 0;
    margin: 0;
    padding: 0;
}

#chart-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--gap-md) var(--gap-lg);
    background-color: var(--results-bg);
}

/* ========================================
   DC.JS CHART OVERRIDES
   ======================================== */

#chart-president_term,
#chart-clemency_type,
#chart-district {
    font-weight: 500;
    font-size: 16px;
}