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/* Modal */
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/* AI Chat Panel */
.ai-panel{background:var(--card);border:1px solid var(--bdr);border-radius:12px;display:flex;flex-direction:column;height:calc(100vh - 140px);min-height:500px;height:calc(100vh - 4rem)}
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.ai-input-row textarea:focus{border-color:var(--ai)}
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.kb-save{background:var(--acc);color:#fff;border:none;padding:.4rem .9rem;border-radius:8px;cursor:pointer;font-size:.85rem;font-weight:600}
.kb-save:disabled{opacity:.6;cursor:not-allowed}
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%) translateY(4rem);background:#1a1a2e;border:1px solid var(--acc);color:var(--fg);padding:.55rem 1.2rem;border-radius:10px;font-size:.85rem;z-index:400;opacity:0;transition:all .35s;pointer-events:none}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.md-img-gallery{display:flex;flex-wrap:nowrap;gap:.4rem;margin:.7rem 0;border-radius:10px;overflow:hidden}
.md-img-gallery.wrap{flex-wrap:wrap}
.md-img-gallery .md-img-cell{flex:1 1 0;min-width:0;height:200px;overflow:hidden;cursor:zoom-in;position:relative}
.md-img-gallery .md-img-cell img{width:100%;height:100%;object-fit:cover;transition:transform .25s;display:block}
.md-img-gallery .md-img-cell img:hover{transform:scale(1.06)}
.md-img-gallery.single .md-img-cell{height:220px;max-width:65%;flex:0 0 65%}
.md-img-gallery.two .md-img-cell{height:200px}
@media(max-width:600px){.wrap{padding:1rem .75rem}.hd h1{font-size:1.5rem}.hd p{font-size:.9rem}.ti{flex-direction:column;align-items:stretch}.ti .sl,.ti .inp{width:100%;min-width:0}.sb{flex-wrap:wrap}.sb .sl{max-width:100%;width:100%}.sb button{min-height:44px}.rc{padding:1rem}.ai-panel-hd{flex-wrap:wrap;gap:.5rem}.ai-panel-hd>div:first-child{flex:1 1 100%}.ai-panel-hd select{min-width:0;max-width:100%}.modal-bg{padding:1rem}.modal-box{margin:1rem;width:calc(100% - 2rem);max-width:none;max-height:90vh;overflow-y:auto;padding:1.25rem 1rem}.ai-panel-hd>div:first-child{min-width:0}.rc-actions{flex-wrap:wrap}.cm .cb{word-break:break-word;overflow-wrap:break-word}.modal-close{padding:.5rem;min-height:44px;min-width:44px}.md-img-gallery{flex-wrap:wrap}.md-img-gallery .md-img-cell{min-width:120px;flex:1 1 120px}.btn,.ai-send{min-height:44px}.rc .read-more,.rc .ask-ai-btn,.rc .tts-btn{padding:.5rem;min-height:44px}.web-toggle,.lang-toggle,.ai-panel-hd .clr-btn{padding:.4rem;min-height:44px}}
@media(max-width:480px){.wrap{padding:.75rem .5rem}.hd h1{font-size:1.25rem}.hd p{font-size:.85rem}.pnl{padding:1rem}.rc{padding:.85rem}.modal-box{padding:.75rem 1rem}.kb-pop{max-width:calc(100vw - 2rem);padding:1rem 1.25rem}.kb-cancel,.kb-save{min-height:44px}.md-img-gallery .md-img-cell{height:160px;min-width:100px}}
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/* KB Management Panel */
.kbm-table{width:100%;border-collapse:collapse;font-size:.8rem;margin-top:.25rem}
.kbm-table th,.kbm-table td{padding:.35rem .5rem;border-bottom:1px solid var(--bdr);vertical-align:top}
.kbm-table th{text-align:left;font-weight:600;color:var(--dim);font-size:.78rem}
.kbm-row-preview{color:var(--dim);line-height:1.4}
.kbm-status{font-size:.8rem;color:var(--dim);margin-top:.25rem}
.kbm-actions{margin-top:.5rem;display:flex;gap:.5rem;align-items:center}
.kbm-actions .kb-cancel{font-size:.8rem}

/* ═══════════════════════════════════════════
   KNOWLEDGE GRAPH PAGE
   ═══════════════════════════════════════════ */

/* ── Body/Shell ── */
.kg-body{margin:0;padding:0;overflow:hidden;height:100vh;background:var(--bg)}
.kg-shell{display:flex;height:100vh;overflow:hidden}

/* ── Loading overlay ── */
.kg-loading{position:fixed;inset:0;z-index:500;background:rgba(13,17,23,.92);display:flex;align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.kg-loading-inner{text-align:center;display:flex;flex-direction:column;align-items:center;gap:.75rem}
.kg-spinner{width:40px;height:40px;border:3px solid rgba(63,185,80,.2);border-top-color:var(--ok);border-radius:50%;animation:kg-spin .8s linear infinite}
@keyframes kg-spin{to{transform:rotate(360deg)}}
.kg-loading-text{font-size:1rem;font-weight:600;color:var(--txt)}
.kg-loading-sub{font-size:.8rem;color:var(--dim)}

/* ── Left Sidebar ── */
.kg-sidebar{width:220px;flex-shrink:0;background:rgba(22,27,34,.97);border-right:1px solid var(--bdr);display:flex;flex-direction:column;overflow:hidden}
.kg-sidebar-hd{padding:.85rem 1rem .7rem;border-bottom:1px solid var(--bdr);display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.kg-logo-link{text-decoration:none}
.kg-logo{font-weight:700;font-size:1rem;color:var(--txt);letter-spacing:-.02em}
.kg-feature-badge{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:.2rem .45rem;border-radius:4px;background:rgba(163,113,247,.25);color:#a371f7}
.kg-sidebar-section{padding:.75rem 1rem;border-bottom:1px solid rgba(48,54,61,.5);overflow-y:auto;flex:1 1 auto}
.kg-sidebar-section:last-child{flex:0 0 auto;border-bottom:none}
.kg-section-label{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--dim);margin-bottom:.6rem}
.kg-topic-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto;max-height:calc(100vh - 260px)}
.kg-topic-item{display:flex;align-items:center;gap:.5rem;padding:.35rem .5rem;border-radius:7px;cursor:pointer;transition:background .15s;font-size:.8rem;user-select:none}
.kg-topic-item:hover{background:rgba(255,255,255,.06)}
.kg-topic-item.active{background:rgba(63,185,80,.12);border:1px solid rgba(63,185,80,.25)}
.kg-topic-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.kg-topic-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--txt)}
.kg-topic-count{font-size:.7rem;font-weight:600;color:var(--dim);font-family:'JetBrains Mono',monospace;background:rgba(255,255,255,.06);padding:.1rem .35rem;border-radius:4px}
.kg-stat-row{display:flex;justify-content:space-between;align-items:center;padding:.3rem 0;font-size:.82rem}
.kg-stat-label{color:var(--dim)}
.kg-stat-val{font-weight:600;color:var(--txt);font-family:'JetBrains Mono',monospace}
.kg-sidebar-placeholder{font-size:.8rem;color:var(--dim);padding:.25rem 0}

/* ── Main Canvas ── */
.kg-main{flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative}
.kg-toolbar{display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem;border-bottom:1px solid var(--bdr);background:rgba(22,27,34,.85);backdrop-filter:blur(6px);flex-shrink:0;gap:.5rem;flex-wrap:wrap}
.kg-toolbar-left{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}
.kg-ctrl-btn{display:flex;align-items:center;gap:.4rem;font-family:Outfit,sans-serif;font-size:.78rem;font-weight:600;padding:.35rem .75rem;border-radius:7px;border:1px solid var(--bdr);cursor:pointer;background:rgba(255,255,255,.04);color:var(--dim);transition:all .2s}
.kg-ctrl-btn:hover{background:rgba(255,255,255,.09);color:var(--txt);border-color:rgba(255,255,255,.2)}
.kg-ctrl-btn.active{background:rgba(88,166,255,.15);color:var(--blue);border-color:var(--blue)}
.kg-back-link{font-size:.78rem;color:var(--dim);text-decoration:none;transition:color .2s}
.kg-back-link:hover{color:var(--blue)}
.kg-canvas-wrap{flex:1;position:relative;overflow:hidden}
.kg-svg{width:100%;height:100%;display:block;cursor:grab}
.kg-svg:active{cursor:grabbing}

/* ── D3 graph elements ── */
.kg-node{cursor:pointer}
.kg-node-label{font-size:.68rem;font-family:Outfit,sans-serif;fill:#c9d1d9;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.8)}
.kg-node--selected .kg-node-circle{filter:brightness(1.2)}
.kg--faded .kg-node-circle{opacity:.15}
.kg--faded .kg-node-label{opacity:.1}
.kg-link{stroke-linecap:round;transition:opacity .25s}
.kg-link--faded{opacity:.08 !important}

/* ── Tooltip ── */
.kg-tooltip{position:absolute;display:none;background:rgba(22,27,34,.95);border:1px solid var(--bdr);border-radius:8px;padding:.5rem .75rem;font-size:.78rem;color:var(--txt);pointer-events:none;z-index:50;backdrop-filter:blur(4px);max-width:200px;box-shadow:0 4px 16px rgba(0,0,0,.4)}
.kg-tooltip strong{display:block;margin-bottom:.15rem;font-size:.82rem}
.kg-tooltip span{color:var(--dim);font-size:.72rem}

/* ── Legend ── */
.kg-legend{position:absolute;bottom:1rem;left:1rem;background:rgba(22,27,34,.9);border:1px solid var(--bdr);border-radius:10px;padding:.75rem 1rem;font-size:.75rem;backdrop-filter:blur(6px)}
.kg-legend-title{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--dim);margin-bottom:.6rem}
.kg-legend-item{display:flex;align-items:center;gap:.5rem;margin-bottom:.35rem;color:var(--dim)}
.kg-legend-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.kg-legend-line{display:inline-block;width:24px;height:2px;flex-shrink:0}
.kg-legend-line.strong{background:rgba(88,166,255,.8)}
.kg-legend-line.weak{background:rgba(200,200,255,.3)}
.kg-legend-sep{border-top:1px solid var(--bdr);margin:.5rem 0}

/* ── Zoom controls ── */
.kg-zoom-controls{position:absolute;right:1rem;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:4px}
.kg-zoom-btn{width:30px;height:30px;border-radius:7px;border:1px solid var(--bdr);background:rgba(22,27,34,.9);color:var(--dim);font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;font-family:monospace;backdrop-filter:blur(4px)}
.kg-zoom-btn:hover{background:rgba(255,255,255,.1);color:var(--txt);border-color:rgba(255,255,255,.25)}

/* ── Right Detail Panel ── */
.kg-detail-panel{width:280px;flex-shrink:0;background:rgba(22,27,34,.97);border-left:1px solid var(--bdr);display:flex;flex-direction:column;overflow:hidden}
.kg-detail-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:2rem 1.5rem;text-align:center;gap:1rem}
.kg-detail-empty-icon{font-size:2.5rem;opacity:.2;line-height:1}
.kg-detail-empty-text{font-size:.85rem;color:var(--dim);line-height:1.5}
.kg-detail-content{display:flex;flex-direction:column;overflow-y:auto;flex:1;padding:1rem}
.kg-detail-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem}
.kg-detail-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--dim)}
.kg-detail-close{background:none;border:none;color:var(--dim);cursor:pointer;font-size:.9rem;padding:.15rem .35rem;border-radius:5px;transition:color .2s}
.kg-detail-close:hover{color:var(--err)}
.kg-detail-topic-name{font-size:1.1rem;font-weight:700;color:var(--txt);margin-bottom:.75rem;line-height:1.3}
.kg-detail-meta{background:rgba(255,255,255,.03);border:1px solid var(--bdr);border-radius:8px;padding:.6rem .75rem;margin-bottom:.9rem;display:flex;flex-direction:column;gap:.35rem}
.kg-detail-meta-row{display:flex;align-items:center;justify-content:space-between;font-size:.8rem}
.kg-detail-meta-label{color:var(--dim)}
.kg-detail-meta-val{font-weight:600;color:var(--txt)}
.kg-domain-badge{padding:.15rem .45rem;border-radius:5px;font-size:.72rem}
.kg-domain-electrical{background:rgba(88,166,255,.15);color:#58a6ff}
.kg-domain-mechanical{background:rgba(240,136,62,.15);color:#f0883e}
.kg-domain-control{background:rgba(163,113,247,.15);color:#a371f7}
.kg-domain-global{background:rgba(63,185,80,.15);color:var(--ok)}
.kg-detail-section-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--dim);margin-bottom:.5rem}
.kg-related-list{display:flex;flex-direction:column;gap:.45rem;margin-bottom:.5rem}
.kg-related-item{display:flex;align-items:center;gap:.45rem;font-size:.78rem}
.kg-rel-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.kg-rel-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--txt)}
.kg-rel-bar-wrap{width:70px;height:4px;background:rgba(255,255,255,.06);border-radius:2px;flex-shrink:0}
.kg-rel-bar{height:4px;border-radius:2px;transition:width .4s}
.kg-rel-pct{font-size:.68rem;color:var(--dim);font-family:'JetBrains Mono',monospace;width:30px;text-align:right;flex-shrink:0}
.kg-rel-empty{font-size:.78rem;color:var(--dim)}
.kg-records-list{display:flex;flex-direction:column;gap:.5rem}
.kg-rec-item{background:rgba(255,255,255,.03);border:1px solid var(--bdr);border-radius:8px;padding:.55rem .7rem}
.kg-rec-preview{font-size:.76rem;color:var(--dim);line-height:1.45;margin-bottom:.35rem}
.kg-rec-actions{display:flex;gap:.35rem}
.kg-rec-btn{font-size:.7rem;font-weight:600;padding:.2rem .5rem;border-radius:6px;border:none;cursor:pointer;background:rgba(124,58,237,.2);color:#a371f7;transition:background .2s}
.kg-rec-btn:hover{background:rgba(124,58,237,.4)}
.kg-records-placeholder{font-size:.78rem;color:var(--dim)}
.kg-detail-actions{margin-top:1rem;padding-top:.75rem;border-top:1px solid var(--bdr)}
.kg-detail-btn{display:block;text-align:center;padding:.45rem .75rem;border-radius:8px;background:rgba(63,185,80,.12);color:var(--ok);border:1px solid rgba(63,185,80,.25);font-size:.8rem;font-weight:600;text-decoration:none;cursor:pointer;transition:background .2s}
.kg-detail-btn:hover{background:rgba(63,185,80,.22)}

/* ── Responsive ── */
@media(max-width:1100px){.kg-detail-panel{width:240px}}
@media(max-width:900px){
  .kg-shell{flex-direction:column}
  .kg-sidebar{width:100%;height:auto;max-height:160px;flex-direction:row;overflow-x:auto;border-right:none;border-bottom:1px solid var(--bdr)}
  .kg-sidebar-hd{border-bottom:none;border-right:1px solid var(--bdr);min-width:140px;flex-direction:column;justify-content:center;padding:.5rem .75rem}
  .kg-sidebar-section{flex:0 0 auto;border-bottom:none;border-right:1px solid var(--bdr);overflow-y:hidden;overflow-x:auto;padding:.5rem .75rem}
  .kg-topic-list{flex-direction:row;max-height:none;flex-wrap:nowrap;gap:4px}
  .kg-topic-item{white-space:nowrap;padding:.25rem .5rem}
  .kg-stat-row{flex-direction:column;align-items:flex-start;gap:0}
  .kg-detail-panel{width:100%;height:260px;border-left:none;border-top:1px solid var(--bdr)}
  .kg-canvas-wrap{min-height:0;flex:1}
}
@media(max-width:600px){
  .kg-toolbar{padding:.4rem .6rem}
  .kg-ctrl-btn{font-size:.7rem;padding:.28rem .55rem}
  .kg-zoom-controls{display:none}
  .kg-legend{display:none}
}