:root {
    --bg-color: #f0f0f0;
    --container-bg: white;
    --text-color: #333;
    --border-color: #ddd;
    --map-fill: white;
    --map-stroke: #333;
    --map-hover-stroke: #333;
    --map-hover-shadow: rgba(0, 0, 0, 0.1);
    --shadow: rgba(0, 0, 0, 0.1);
    --option-bg: #fff;
    --tooltip-bg: rgba(0, 0, 0, 0.8);
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f0f0;
    --border-color: #444;
    --map-fill: white;
    --map-stroke: #555;
    --shadow: rgba(0, 0, 0, 0.5);
    --option-bg: #3d3d3d;
    --tooltip-bg: rgba(255, 255, 255, 0.9);
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: Arial, sans-serif;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.back-link {
    position: fixed;
    top: 18px;
    left: 18px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--container-bg);
    color: var(--text-color);
    text-decoration: none;
    border: 1px solid var(--border-color);
    box-shadow: 0 0 10px var(--shadow);
    z-index: 40;
    transition:
        transform 0.18s ease,
        background-color var(--transition-speed),
        color var(--transition-speed),
        border-color var(--transition-speed),
        box-shadow var(--transition-speed);
}

.back-link:hover {
    transform: translateY(-1px);
}

.back-link-arrow {
    font-size: 1.15rem;
    line-height: 1;
}

.back-link-label {
    font-size: 0.92rem;
    font-weight: 600;
}

#app-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    max-width: 1450px;
}

#ranking-container {
    background: var(--container-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px var(--shadow);
    width: 320px;
    flex-shrink: 0;
    display: none;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition:
        opacity 0.25s ease,
        transform 0.25s ease,
        background-color var(--transition-speed),
        box-shadow var(--transition-speed);
}

#ranking-container.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#ranking-container h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    color: var(--text-color);
}

#ranking-description {
    margin: 0 0 15px;
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-color);
    opacity: 0.8;
}

#ranking-list {
    max-height: 720px;
    overflow-y: auto;
    padding-right: 6px;
}

.ranking-items {
    margin: 0;
    padding-left: 24px;
}

.ranking-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.ranking-name {
    font-size: 0.9rem;
    color: var(--text-color);
}

.ranking-value {
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--text-color);
    white-space: nowrap;
}

.ranking-empty {
    margin: 0;
    padding: 14px;
    background: var(--bg-color);
    border-radius: 6px;
    color: var(--text-color);
}

#map-container {
    background-color: var(--container-bg);
    padding: 20px;
    box-shadow: 0 0 10px var(--shadow);
    border-radius: 8px;
    position: relative;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

svg {
    display: block;
}

.department {
    fill: var(--map-fill);
    stroke: var(--map-stroke);
    stroke-width: 0.5px;
    transition: fill 0.2s, stroke 0.2s;
}

.department:hover {
    fill-opacity: 0.7;
    stroke: var(--map-hover-stroke);
    stroke-width: 2px;
    filter: drop-shadow(0 0 2px var(--map-hover-shadow));
    z-index: 100;
}

h1 {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 10px;
}

#zoom-slider-container {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: var(--container-bg);
    padding: 5px 10px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    box-shadow: 0 0 5px var(--shadow);
    opacity: 0.8;
}

#zoom-slider {
    width: 100px;
    cursor: pointer;
}

#options-container {
    background: var(--container-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px var(--shadow);
    font-size: 0.95rem;
    width: 250px;
    flex-shrink: 0;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
}

#options-container h2 {
    margin-top: 0;
    font-size: 1.1rem;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    color: var(--text-color);
}

#options-container select {
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--option-bg);
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
}

.prefecture {
    fill: var(--text-color);
    stroke: var(--container-bg);
    stroke-width: 1px;
    vector-effect: non-scaling-stroke;
    opacity: 0.8;
    pointer-events: all;
    cursor: pointer;
    transition: r 0.2s ease, fill 0.2s;
}

.prefecture:hover {
    opacity: 1;
}

#tooltip {
    position: absolute;
    background-color: var(--tooltip-bg);
    color: var(--bg-color);
    /* Inversion pour lisibilité */
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    pointer-events: none;
    display: none;
    z-index: 10;
    white-space: nowrap;
    box-shadow: 0 0 5px var(--shadow);
}

.department.selected {
    stroke: #ffcc00;
    stroke-width: 3px;
    filter: drop-shadow(0 0 5px rgba(255, 204, 0, 0.5));
}

#stats-panel {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid var(--border-color);
}

#stats-panel h3 {
    margin-top: 0;
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.stat-item {
    background: var(--bg-color);
    padding: 10px;
    border-radius: 4px;
    border-left: 4px solid var(--text-color);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-color);
    opacity: 0.7;
    text-transform: uppercase;
    margin-bottom: 3px;
}

.stat-value {
    display: block;
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-color);
}

#clear-selection {
    margin-top: 15px;
    width: 100%;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 5px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.2s;
}

#clear-selection:hover {
    background-color: var(--bg-color);
}

/* Bouton Theme Switcher */
.theme-switch {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

#theme-toggle {
    background-color: var(--text-color);
    color: var(--container-bg);
    border: none;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: bold;
    transition: transform 0.2s;
}

#theme-toggle:hover {
    transform: scale(1.05);
}

#version-panel {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 2px solid var(--border-color);
}

#version-panel h3 {
    margin: 0 0 10px;
    font-size: 1rem;
    color: var(--text-color);
}

.version-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--text-color);
    color: var(--container-bg);
    font-size: 0.85rem;
    font-weight: bold;
}

.version-label {
    margin: 14px 0 6px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
}

.version-note {
    margin: 0;
    padding: 12px;
    background: var(--bg-color);
    border-radius: 6px;
    color: var(--text-color);
    line-height: 1.4;
}

@media (max-width: 1400px) {
    .back-link {
        top: 12px;
        left: 12px;
        padding: 9px 12px;
    }

    .back-link-label {
        font-size: 0.86rem;
    }

    #app-container {
        flex-wrap: wrap;
        justify-content: center;
    }
}