:root {
    --panel-bg: rgba(20, 22, 26, 0.92);
    --panel-fg: #f3f4f5;
    --panel-muted: #9aa0a6;
    --panel-border: rgba(255, 255, 255, 0.08);
    --accent: #4a7c59;
    --danger: #c95757;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #000;
    color: var(--panel-fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
}

#map {
    position: fixed;
    inset: 0;
    z-index: 0;
}

.panel {
    position: fixed;
    top: 16px;
    width: 280px;
    max-height: calc(100vh - 32px);
    background: var(--panel-bg);
    color: var(--panel-fg);
    border-radius: 8px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 10;
    backdrop-filter: blur(6px);
}
.panel-left { left: 16px; }
.panel-right { right: 16px; }

.panel-header {
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--panel-border);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.panel-title { text-transform: uppercase; font-size: 11px; color: var(--panel-muted); }

.panel-body {
    padding: 8px 4px;
    overflow-y: auto;
    flex: 1 1 auto;
    min-height: 80px;
}

.panel-footer {
    padding: 8px 12px;
    border-top: 1px solid var(--panel-border);
    font-size: 12px;
    color: var(--panel-muted);
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--panel-fg);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    line-height: 1;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.06); }

/* Places tree */
.tree-node {
    display: flex;
    align-items: center;
    padding: 4px 8px;
    font-size: 13px;
    border-radius: 4px;
    cursor: pointer;
    user-select: none;
}
.tree-node:hover { background: rgba(255, 255, 255, 0.05); }
.tree-node .visibility {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    border: 1px solid var(--panel-border);
    margin-right: 8px;
    background: var(--accent);
    flex: 0 0 auto;
}
.tree-node.hidden .visibility { background: transparent; }
.tree-node .label {
    flex: 1 1 auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.tree-node .delete {
    opacity: 0;
    background: transparent;
    border: 0;
    color: var(--danger);
    cursor: pointer;
    font-size: 14px;
    padding: 0 4px;
}
.tree-node:hover .delete { opacity: 1; }

.tree-node-child {
    padding-left: 28px;
    font-size: 12px;
    color: var(--panel-muted);
}

/* Layer toggles */
.layer-toggle {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    font-size: 13px;
    cursor: pointer;
}
.layer-toggle input { margin-right: 8px; }

/* Toolbar */
#toolbar {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
    background: var(--panel-bg);
    border-radius: 8px;
    padding: 8px;
    backdrop-filter: blur(6px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

.btn {
    background: rgba(255, 255, 255, 0.08);
    color: var(--panel-fg);
    border: 1px solid var(--panel-border);
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}
.btn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.14); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: #5a8c69; }

#convert-format {
    background: rgba(255, 255, 255, 0.08);
    color: var(--panel-fg);
    border: 1px solid var(--panel-border);
    padding: 6px 8px;
    border-radius: 4px;
    font-size: 13px;
}

/* Dropzone overlay (visible on drag) */
#dropzone-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: 20;
    display: none;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}
#dropzone-overlay.active { display: flex; }
.dropzone-card {
    background: var(--panel-bg);
    padding: 32px 48px;
    border-radius: 12px;
    border: 2px dashed var(--accent);
    text-align: center;
}
.dropzone-title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.dropzone-formats { font-size: 12px; color: var(--panel-muted); }

/* Toast */
#toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 16px;
    background: var(--panel-bg);
    color: var(--panel-fg);
    border-radius: 6px;
    font-size: 13px;
    opacity: 0;
    transition: opacity 0.18s ease;
    z-index: 30;
    pointer-events: none;
    max-width: 480px;
    text-align: center;
}
#toast.show { opacity: 1; }
#toast.error { background: #5a2222; }