/* ===================== 悬链线距离计算专用样式 ===================== */

/* 通用样式 */
*{box-sizing:border-box;margin:0;padding:0}
.wrap{max-width:1600px;margin:0 auto;padding:16px}
.card{background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(21,101,192,.1);margin-bottom:16px;overflow:hidden}
.card-title{background:linear-gradient(135deg,#1565c0,#0d47a1);color:#fff;padding:10px 16px;font-size:15px;font-weight:bold;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.card-body{padding:16px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.col{flex:1;min-width:180px}
.lbl{font-size:12px;color:#555;margin-bottom:4px}
.lbl span{color:#c62828}
input,select{width:100%;padding:8px 10px;border:1.5px solid #ccc;border-radius:6px;font-size:14px;transition:border .2s,box-shadow .2s}
input:focus,select:focus{outline:none;border-color:#1565c0;box-shadow:0 0 0 3px rgba(21,101,192,.12)}
.result-box{background:#f8f9fa;border:2px solid #1565c0;border-radius:8px;padding:14px 16px;margin-top:12px}
.result-main{font-size:36px;color:#c62828;font-weight:bold;line-height:1.2}
.result-main span{font-size:16px;color:#555;margin-left:8px}
.result-detail{display:grid;grid-template-columns:1fr 1fr;gap:8px 24px;margin-top:12px}
.result-item{display:flex;justify-content:space-between;font-size:13px;padding:4px 0;border-bottom:1px solid #eee}
.result-item .k{color:#888}
.result-item .v{font-weight:bold;color:#333}
.result-item .v.highlight{color:#c62828;font-size:15px}
.btn-row{display:flex;gap:12px;margin-top:14px;flex-wrap:wrap}
.btn{padding:10px 20px;border:none;border-radius:6px;font-size:14px;cursor:pointer;font-weight:bold;transition:all .2s}
.btn-primary{background:#1565c0;color:#fff}
.btn-primary:hover{background:#0d47a1}
.btn-outline{background:#fff;color:#1565c0;border:2px solid #1565c0}
.btn-outline:hover{background:#e3f2fd}
.btn svg{width:16px;height:16px;vertical-align:middle;margin-right:6px}
.ref-info{font-size:12px;color:#555;background:#fff8e1;padding:8px 12px;border-radius:6px;margin-top:10px;border-left:3px solid #f57c00;line-height:1.8}
.ref-info code{font-size:11px;font-family:Consolas,monospace}
input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none}
svg.icon{display:inline-block;width:1em;height:1em;vertical-align:-0.125em}

/* 悬链线输入行 */
.catenary-row{display:flex;gap:8px;flex-wrap:wrap;padding:12px;background:#f8f9fa;border:1.5px solid #e0e0e0;border-radius:8px;margin-bottom:10px;position:relative;transition:all .2s}
.catenary-row:hover{border-color:#1565c0;box-shadow:0 2px 8px rgba(21,101,192,.1)}
.catenary-row .row-header{display:flex;justify-content:space-between;align-items:center;width:100%;margin-bottom:8px}
.catenary-row .row-title{font-weight:600;color:#1565c0;font-size:14px}
.catenary-row .btn-del{background:#ef5350;color:#fff;border:none;border-radius:4px;padding:2px 10px;font-size:12px;cursor:pointer;transition:all .2s}
.catenary-row .btn-del:hover{background:#c62828}
.catenary-fields{display:flex;gap:8px;flex-wrap:wrap;width:100%}
.catenary-fields .col{min-width:120px;flex:1}

/* 配对选择区 */
.pair-select-wrap{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.pair-select-wrap select{min-width:240px;padding:8px 10px;border:1.5px solid #ccc;border-radius:6px;font-size:14px;cursor:pointer}
.pair-select-wrap select:focus{outline:none;border-color:#1565c0;box-shadow:0 0 0 3px rgba(21,101,192,.12)}

/* 密度/计数标签 */
.density-display{display:inline-block;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:2px 10px;border-radius:12px;font-size:13px;margin-left:8px;font-weight:500}

/* 响应式 */
@media(max-width:900px){
  .col{min-width:140px}
  .result-main{font-size:28px}
  .catenary-fields .col{min-width:calc(50% - 4px);flex:1 1 calc(50% - 4px)}
  .pair-select-wrap{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
  .pair-select-wrap select{min-width:180px;flex:1 1 auto;max-width:100%}
}
@media(max-width:480px){
  .btn{padding:10px 16px;font-size:14px}
  .pair-select-wrap{flex-direction:column;align-items:stretch}
  .pair-select-wrap select{width:100%;min-width:0}
  .result-main{font-size:24px}
  .catenary-fields .col{min-width:calc(50% - 4px)!important;flex:1 1 calc(50% - 4px)!important;max-width:calc(50% - 4px)!important}
  .catenary-fields .col[style*="max-width"]{max-width:calc(50% - 4px)!important}
  .col{min-width:calc(50% - 4px)!important;flex:1 1 calc(50% - 4px)!important}
  .result-detail{grid-template-columns:1fr}
}

#scene-container{touch-action:none;overflow:hidden;position:relative}
#axis-btn-container button:hover{transform:scale(1.1)}

.viewcube-wrap{position:absolute;top:10px;right:10px;width:100px;height:100px;z-index:20;cursor:pointer;opacity:0.9;transition:opacity .2s}
.viewcube-wrap:hover{opacity:1}
.viewcube-svg{width:100%;height:100%;filter:drop-shadow(1px 2px 4px rgba(0,0,0,.3))}
.vc-face{transition:fill .15s}
.vc-face:hover{fill:rgba(100,180,255,0.7)!important}
.vc-corner:hover{fill:#fff!important;stroke:#4488ff!important;stroke-width:1.5!important}
.vc-edge:hover{fill:#4488ff!important;opacity:1!important;r:4.5!important}
.vc-home-btn:hover rect{fill:#e3f2fd!important;stroke:#1565c0!important}
.vc-home-btn:hover text{fill:#1565c0!important}
@media(max-width:480px){.viewcube-wrap{width:72px;height:72px;top:6px;right:6px}}
.axis-indicator{position:absolute;bottom:8px;left:8px;width:100px;height:100px;z-index:15;pointer-events:none;opacity:0.85}
.axis-indicator svg{filter:drop-shadow(1px 1px 2px rgba(0,0,0,.5))}

.pair-select-wrap .btn{min-width:100px;justify-content:center;text-align:center;white-space:nowrap}