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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    position: relative;
}

#map {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    min-height: 100vh;
    z-index: 0;
    background-color: #1a1a2e;
}

#sidebar {
    position: absolute;
    top: 0;
    left: 0;
    width: 370px;
    max-height: 100vh;
    background: rgba(22, 22, 35, 0.95);
    padding: 20px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.4);
}

.title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 15px;
}

#sidebar h1 {
    font-size: 22px;
    margin-bottom: 3px;
    color: #e0e0e0;
}

#sidebar h2 {
    font-size: 16px;
    color: #8899a6;
    margin-bottom: 0;
    font-weight: normal;
}

.mode-buttons {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
    margin-top: 2px;
}

.mode-btn {
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border: 2px solid #444;
    border-radius: 4px;
    background: #2a2a3d;
    color: #aaa;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.mode-btn:hover {
    border-color: #6a6a8a;
    color: #ddd;
}

.mode-btn.active {
    background: #4a9eff;
    color: #fff;
    border-color: #4a9eff;
}

#sidebar h3 {
    font-size: 16px;
    margin-top: 20px;
    margin-bottom: 10px;
    color: #c0c0d0;
}

.info-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #2a2a3d;
}

.info-section:last-child {
    border-bottom: none;
}

.info-section p {
    font-size: 14px;
    line-height: 1.6;
    color: #999;
    margin-bottom: 10px;
}

.info-section a {
    color: #5dade2;
    text-decoration: none;
}

.info-section a:hover {
    text-decoration: underline;
}

.info-section ul {
    margin-left: 20px;
    font-size: 14px;
    color: #999;
}

.info-section li {
    margin-bottom: 5px;
}

/* ─── Species group controls ─────────────────────────────── */

#species-controls {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #2a2a3d;
}

.group-section {
    margin-bottom: 8px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid #333;
}

.group-header {
    padding: 8px 12px;
    cursor: pointer;
    user-select: none;
}

.group-section[data-group="mammals"] .group-header {
    background: linear-gradient(135deg, #3a1a1a, #4a2020);
}
.group-section[data-group="birds"] .group-header {
    background: linear-gradient(135deg, #1a2a3a, #1e3450);
}
.group-section[data-group="amphibians"] .group-header {
    background: linear-gradient(135deg, #1a3a1a, #1e4a28);
}

.group-toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: #ddd;
    margin: 0;
}

.group-toggle input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.group-name {
    flex: 1;
}

.group-arrow {
    font-size: 10px;
    color: #666;
    transition: transform 0.2s;
}

.group-section.collapsed .group-arrow {
    transform: rotate(-90deg);
}

.species-list {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
    padding: 4px;
    background: #1e1e2e;
    max-height: 500px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

.group-section.collapsed .species-list {
    max-height: 0;
    padding: 0;
    overflow: hidden;
}

.species-tile {
    position: relative;
    overflow: hidden;
    border-radius: 3px;
    cursor: pointer;
    background: #333;
    user-select: none;
    aspect-ratio: 1;
}

.species-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: filter 0.2s;
}

.species-tile.inactive img {
    filter: grayscale(1);
}

.species-tile .species-border {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 3px;
    pointer-events: none;
    transition: border-color 0.2s;
}

.species-tile:not(.inactive) .species-border {
    border-color: currentColor;
}

.species-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.85);
    color: #fff;
    font-size: 11px;
    line-height: 1.3;
    padding: 4px 8px;
    border-radius: 4px;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 10;
}

.species-tile:hover .species-tooltip {
    opacity: 1;
}

.species-tooltip .tt-common {
    font-weight: 600;
}

.species-tooltip .tt-sci {
    font-style: italic;
    opacity: 0.85;
}

.species-tooltip .tt-hint {
    font-size: 10px;
    opacity: 0.6;
}

/* ─── Visualization controls ─────────────────────────────── */

.controls {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #2a2a3d;
}

.controls:last-child {
    border-bottom: none;
}

.controls label {
    display: block;
    margin-bottom: 10px;
    font-size: 14px;
    color: #999;
    cursor: pointer;
}

.controls input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
}

.controls input[type="range"] {
    width: 100%;
    margin-top: 5px;
    margin-bottom: 5px;
}

.controls span {
    float: right;
    color: #666;
    font-size: 12px;
}

#advanced-controls {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #2a2a3d;
}

/* ─── Flow canvas ─────────────────────────────────────────── */

#flow-canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 1;
    background: transparent;
}

/* ─── Mapbox controls ─────────────────────────────────────── */

.mapboxgl-ctrl-top-right { top: 20px; right: 20px; }
.mapboxgl-ctrl-bottom-right { bottom: 20px; right: 20px; }

/* ─── Responsive ──────────────────────────────────────────── */

@media (max-width: 768px) {
    #sidebar {
        width: 100%;
        max-height: 40vh;
        position: relative;
    }
    #map {
        height: 60vh;
    }
}