.mmr-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;
}

.mmr-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);
    flex-shrink: 0;
}

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

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

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

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

.mmr-toolbar-right { display: flex; align-items: center; gap: 6px; }

.mmr-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

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

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

.mmr-canvas-wrap {
    position: relative;
    overflow: auto;
    min-height: 480px;
    background-color: #f3f4f6;
    background-image: radial-gradient(circle, #d1d5db 1px, transparent 1px);
    background-size: 18px 18px;
}

.mmr-stage {
    position: relative;
    min-width: 1200px;
    min-height: 520px;
}

.mmr-links {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
    z-index: 0;
}

.mmr-nodes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.mmr-node {
    position: absolute;
    pointer-events: auto;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.mmr-node-text {
    outline: none;
    cursor: text;
    white-space: nowrap;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.4;
}

.mmr-node--root .mmr-node-text {
    display: inline-block;
    padding: 10px 18px;
    font-size: 0.95rem;
    font-weight: 700;
    color: #312e81;
    background: #fff;
    border: 2.5px solid #a855f7;
    border-radius: 12px;
    box-shadow: 0 4px 14px rgba(168, 85, 247, 0.12);
    white-space: normal;
    max-width: 200px;
    text-align: center;
}

.mmr-node--branch .mmr-node-text {
    font-size: 0.88rem;
    font-weight: 700;
    padding: 5px 12px;
    background: #f3f4f6;
    border-radius: 6px;
    position: relative;
    z-index: 1;
}

.mmr-node--sub .mmr-node-text {
    font-size: 0.82rem;
    font-weight: 600;
    padding: 4px 10px;
    background: #f3f4f6;
    border-radius: 6px;
    position: relative;
    z-index: 1;
}

.mmr-node--leaf .mmr-node-text {
    font-size: 0.78rem;
    font-weight: 400;
    color: #4b5563;
    padding: 4px 10px;
    background: #f3f4f6;
    border-radius: 6px;
    white-space: normal;
    max-width: 220px;
    text-align: left;
    position: relative;
    z-index: 1;
}

.mmr-node-text:focus {
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.mmr-node--branch[data-color="purple"] .mmr-node-text { color: #9333ea; }
.mmr-node--branch[data-color="blue"] .mmr-node-text { color: #2563eb; }
.mmr-node--branch[data-color="green"] .mmr-node-text { color: #16a34a; }
.mmr-node--sub[data-color="purple"] .mmr-node-text { color: #7e22ce; }
.mmr-node--sub[data-color="blue"] .mmr-node-text { color: #1d4ed8; }
.mmr-node--sub[data-color="green"] .mmr-node-text { color: #15803d; }

.mmr-node-image {
    position: absolute;
    pointer-events: auto;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid #fff;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    background: #eef2ff;
    z-index: 3;
}

.mmr-node-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.mmr-node-image--purple { box-shadow: 0 0 0 2px #c084fc; }
.mmr-node-image--blue { box-shadow: 0 0 0 2px #60a5fa; }
.mmr-node-image--green { box-shadow: 0 0 0 2px #4ade80; }

.mmr-node-badge {
    position: absolute;
    top: -7px;
    right: -9px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #a855f7;
    color: #fff;
    font-size: 0.66rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 3;
    box-shadow: 0 0 0 2px #f3f4f6;
    line-height: 1;
}

.mmr-node--branch[data-color="purple"] .mmr-node-badge { background: #a855f7; }
.mmr-node--branch[data-color="blue"] .mmr-node-badge { background: #3b82f6; }
.mmr-node--branch[data-color="green"] .mmr-node-badge { background: #22c55e; }