/* Custom variables for a sleek, premium, educational slate aesthetic */
:root {
    --bg-dark: #0f172a;       /* slate-900 */
    --panel-bg: #1e293b;     /* slate-800 */
    --panel-border: #334155; /* slate-700 */
    --text-main: #f8fafc;    /* slate-50 */
    --text-muted: #94a3b8;   /* slate-400 */
    --accent: #0ea5e9;       /* sky-500 */
    --accent-hover: #38bdf8; /* sky-400 */
    --map-bg: #111827;       /* dark background inside viewport */
    --land-color: #334155;   /* default country color */
    --land-hover: #0284c7;   /* hover fill state */
    --land-selected: #f59e0b;/* selected country outline/fill (amber-500) */
    --border-color: #475569;  /* sharp, visible boundaries */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
}

/* Base Layout */
.explorer-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

/* Map Viewer Space */
.map-viewer {
    flex: 1;
    position: relative;
    background-color: var(--map-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Navigation Breadcrumbs */
.map-navigation {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 10;
    background: rgba(30, 41, 59, 0.85);
    padding: 10px 16px;
    border-radius: 6px;
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.nav-item {
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

.nav-item.active {
    color: var(--text-main);
    font-weight: 600;
}

.nav-item:hover:not(.active) {
    color: var(--accent-hover);
}

.nav-arrow {
    color: var(--text-muted);
    user-select: none;
}

/* Viewport clamping and centering */
.map-viewport {
    flex: 1;
    width: 100%;
    height: 100%;
    cursor: grab;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.map-viewport:active {
    cursor: grabbing;
}

.map-transform-layer {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.1s cubic-bezier(0.25, 1, 0.5, 1);
    transform-origin: center center;
}

.map-layer {
    width: 100%;
    height: 100%;
    display: none;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.map-layer.active {
    display: flex;
    opacity: 1;
}

/* Global SVG Styling rules */
svg {
    max-width: 95%;
    max-height: 95%;
    width: auto;
    height: auto;
    user-select: none;
}

/* ESSENTIAL: vector-effect ensures borders do not lose resolution when zooming in */
svg path {
    fill: var(--land-color);
    stroke: var(--border-color);
    stroke-width: 0.75px;
    vector-effect: non-scaling-stroke;
    transition: fill 0.2s cubic-bezier(0.4, 0, 0.2, 1), stroke 0.2s ease;
    cursor: pointer;
}

/* Hover & Selected rules */
svg path:hover {
    fill: var(--land-hover) !important;
}

svg path.selected-path {
    fill: var(--land-selected) !important;
    stroke: #ffffff !important;
    stroke-width: 1.5px !important;
}

/* Side Panel styling */
.sidebar {
    width: 360px;
    background-color: var(--panel-bg);
    border-left: 1px solid var(--panel-border);
    display: flex;
    flex-direction: column;
    z-index: 5;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.25);
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--panel-border);
}

.sidebar-header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.025em;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.sidebar-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.details-pane {
    display: none;
}

.details-pane.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.info-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.metadata-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.metadata-table th, .metadata-table td {
    padding: 10px 0;
    border-bottom: 1px solid var(--panel-border);
    font-size: 0.9rem;
    text-align: left;
}

.metadata-table th {
    color: var(--text-muted);
    font-weight: 500;
    width: 40%;
}

.metadata-table td {
    color: var(--text-main);
    font-weight: 600;
}

#country-description {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* Explore Transition Trigger Button */
.explore-button {
    width: 100%;
    padding: 14px;
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.explore-button:hover {
    background-color: var(--accent-hover);
}

.explore-button:active {
    transform: scale(0.98);
}

.sidebar-footer {
    padding: 20px;
    text-align: center;
    border-top: 1px solid var(--panel-border);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Standard Control Elements */
.map-controls {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
}

.map-controls button {
    width: 42px;
    height: 42px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.map-controls button:hover {
    background-color: var(--panel-border);
    color: var(--accent-hover);
}

/* Interactive Cursor Tooltip */
.tooltip {
    position: fixed;
    pointer-events: none;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid var(--accent);
    color: #ffffff;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    z-index: 100;
    opacity: 0;
    transform: translate(-50%, -120%);
    transition: opacity 0.1s ease;
    white-space: nowrap;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

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

/* Responsive adjustment for Mobile screens */
@media (max-width: 768px) {
    .explorer-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: 300px;
        border-left: none;
        border-top: 1px solid var(--panel-border);
    }
    .map-controls {
        bottom: auto;
        top: 20px;
        right: 20px;
        left: auto;
        flex-direction: row;
    }
}