.bpos-tool-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    min-height: 520px;
}

.bpos-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-muted, #f9fafb);
}

.bpos-toolbar-left { display: flex; align-items: center; gap: 8px; }

.bpos-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
}

.bpos-title i { color: #6366f1; }

.bpos-badge {
    font-size: 0.68rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.1);
    color: #6366f1;
}

.bpos-toolbar-right { display: flex; gap: 6px; }

.bpos-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    font-size: 0.78rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
}

.bpos-btn:hover { border-color: #6366f1; color: #6366f1; }

.bpos-btn-primary {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-color: transparent;
    color: #fff !important;
}

.bpos-canvas-wrap {
    padding: 20px 24px;
    background: linear-gradient(180deg, #fafbff 0%, #fff 100%);
    overflow: auto;
}

.bpos-board {
    max-width: 760px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 24px 28px 28px;
    box-shadow: 0 4px 24px rgba(99, 102, 241, 0.06);
}

.bpos-header { margin-bottom: 20px; padding-bottom: 16px; border-bottom: 2px solid #eef2ff; }

.bpos-map-title {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: #312e81;
}

.bpos-map-subtitle {
    margin: 6px 0 0;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.bpos-outline {
    list-style: none;
    margin: 0;
    padding: 0;
}

.bpos-item {
    position: relative;
    margin: 0;
    padding: 6px 0 6px 0;
}

.bpos-item[data-level="1"] { padding-left: 0; }
.bpos-item[data-level="2"] { padding-left: 24px; }
.bpos-item[data-level="3"] { padding-left: 48px; }

.bpos-item[data-level="2"]::before,
.bpos-item[data-level="3"]::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e0e7ff;
}

.bpos-item-text {
    display: block;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-primary);
    border: 1px solid transparent;
    transition: background 0.15s;
}

.bpos-item[data-level="1"] > .bpos-item-text {
    font-weight: 700;
    color: #4338ca;
    background: #eef2ff;
    border-color: #c7d2fe;
}

.bpos-item[data-level="2"] > .bpos-item-text {
    font-weight: 600;
    color: #3730a3;
}

.bpos-item[data-level="3"] > .bpos-item-text {
    color: var(--text-secondary);
}

.bpos-item-text:focus {
    outline: none;
    background: #fff;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}