/* ─ CAD Viewer — 라이트 테마 ─────────────────────────────────────
   밝은 회색 리본/패널 + 흰 모델스페이스 (AutoCAD 라이트 스킴 계열) */
:root{
  --ui:#f4f5f7;      /* 리본·툴바·패널 */
  --ui2:#e9ebee;     /* 프레임·상태바·제목표시줄 */
  --hover:#dfe4ea;
  --line:#d3d7dc; --line2:#b9c0c8;
  --fg:#2c313a; --mut:#5f6672;
  --acc:#2f6db5; --acc-d:#2a6496;
  --ok:#4e8f3c; --warn:#c98a00;
  --font:"Segoe UI","Pretendard","Malgun Gothic","맑은 고딕","Apple SD Gothic Neo","Noto Sans KR",system-ui,sans-serif;
  --mono:"Consolas","D2Coding",ui-monospace,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--ui2);color:var(--fg);font:12.5px/1.45 var(--font);overflow:hidden}
button,input,select{font:inherit;color:inherit}

::-webkit-scrollbar{width:13px;height:13px}
::-webkit-scrollbar-track{background:#eef0f3}
::-webkit-scrollbar-thumb{background:#c2c9d1;border:3px solid #eef0f3}
::-webkit-scrollbar-thumb:hover{background:#a9b2bc}
::-webkit-scrollbar-corner{background:#eef0f3}

kbd{font:9.5px var(--mono);color:var(--mut);border:1px solid var(--line2);border-radius:2px;padding:0 3px;margin-left:5px;background:#eef0f3}

/* 상단 툴바(리본) */
.topbar{display:flex;align-items:center;padding:0 8px;background:var(--ui);border-bottom:1px solid var(--line);height:44px;white-space:nowrap;overflow-x:auto}
.brand{font-weight:700;font-size:13.5px;letter-spacing:.3px;color:#1c2026;padding:0 12px 0 6px}
.brand span{color:var(--mut);font-weight:400;margin-left:7px}
.tb-group{display:flex;align-items:center;gap:3px;padding:0 10px;border-left:1px solid var(--line);height:100%}
.tb-group.right{margin-left:auto}
.btn{display:inline-flex;align-items:center;gap:5px;background:transparent;border:1px solid transparent;border-radius:2px;padding:4px 9px;cursor:pointer;color:var(--fg)}
.btn svg{width:13px;height:13px;flex:none}
.btn:hover{background:var(--hover);border-color:var(--line2)}
.btn.active{background:#d7e4f2;border-color:var(--acc)}
.btn.primary{background:var(--acc-d);border-color:#35729f;color:#fff}
.btn.primary:hover{background:#2a6496}
.btn.sm{padding:2px 7px;font-size:11.5px}
select,input[type=number],input[type=search]{background:#fff;border:1px solid #c8cdd3;border-radius:2px;padding:3px 6px}
select:hover,input:hover{border-color:var(--line2)}
select:focus,input:focus{outline:1px solid var(--acc);outline-offset:-1px}
#fileSel{max-width:250px}
input[type=number]{width:60px}
.inline{display:inline-flex;align-items:center;gap:4px;color:var(--mut)}

.layout{display:grid;grid-template-columns:1fr;height:calc(100% - 68px)}

/* 플로팅 창 (윈도우식 패널) */
.fwin{position:fixed;background:var(--ui);border:1px solid #a8b0ba;border-radius:4px;box-shadow:0 8px 28px rgba(20,30,45,.22);display:flex;flex-direction:column;z-index:10;overflow:hidden}
#winLayers{left:8px;top:52px;width:262px;height:46vh}
#winTypes{left:8px;top:calc(52px + 46vh + 8px);width:262px;max-height:220px}
#winProps{left:calc(100vw - 426px);top:52px;width:418px;height:calc(100vh - 84px)}
.fwin-title{display:flex;justify-content:space-between;align-items:center;background:var(--ui2);padding:6px 6px 6px 12px;border-bottom:1px solid var(--line);font-weight:600;font-size:12.5px;user-select:none;-webkit-user-select:none}
.fwin-title small{color:var(--mut);font-weight:400;margin-left:4px}
.fwin-close{background:transparent;border:0;color:var(--mut);font-size:13px;cursor:pointer;padding:2px 8px;border-radius:2px;line-height:1}
.fwin-close:hover{background:#e8c9c9;color:#b03a3a}
.fwin-body{flex:1;min-height:0;display:flex;flex-direction:column;overflow:hidden}
.fwin-tools{display:flex;gap:6px;padding:8px;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--line)}
.fwin-tools input[type=search]{flex:1;min-width:100px}
.fwin .hint{margin:4px 10px}
.fwin .list{padding:2px 4px}
h3{font-size:11.5px;margin:10px 10px 4px;color:var(--mut);font-weight:600}

/* 앱 최하단 상태바 (개발사 정보) */
.appfoot{height:24px;display:flex;align-items:center;gap:16px;padding:0 12px;background:var(--ui2);border-top:1px solid var(--line);font-size:11px;color:var(--mut);white-space:nowrap;overflow:hidden}
.appfoot .grow{flex:1}
.appfoot .mail{color:var(--acc-d);text-decoration:none;margin-left:2px}
.appfoot .mail:hover{text-decoration:underline}

.mini-btns{display:flex;gap:3px}
.mini-btns button{background:transparent;border:1px solid var(--line);border-radius:2px;font-size:11px;padding:1px 6px;cursor:pointer;color:var(--mut)}
.mini-btns button:hover{color:var(--fg);border-color:var(--line2);background:var(--hover)}
.hint{color:var(--mut);font-size:11px;margin:4px 0}

.list{list-style:none;margin:0;padding:0;overflow:auto;flex:1;min-height:0}
.list li{display:flex;align-items:center;gap:6px;padding:2px 4px;border-radius:2px;cursor:default}
.list li:hover{background:var(--hover)}
.list li.off .lname{color:var(--mut);text-decoration:line-through}
.list .ico{width:18px;height:18px;border:0;background:transparent;cursor:pointer;padding:0;color:var(--fg);display:flex;align-items:center;justify-content:center;border-radius:2px}
.list .ico svg{width:13px;height:13px}
.list .ico:hover{background:#d3dae1}
.list .ico.dim{opacity:.28}
.swatch{width:11px;height:11px;border-radius:1px;border:1px solid #00000055;flex:none}
.lname{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;cursor:pointer}
.cnt{color:var(--mut);font-size:11px;font-variant-numeric:tabular-nums}
.types{max-height:200px;flex:none}
.types label{display:flex;gap:6px;align-items:center;flex:1;cursor:pointer}

/* 뷰포트 — 기본 흰 배경, 배경 전환 시 다크 */
.viewport{position:relative;overflow:hidden;background:#212830}
body.light .viewport{background:#fff}
#cv{position:absolute;inset:0;width:100%;height:calc(100% - 23px);display:block;cursor:crosshair}
.status{position:absolute;left:0;right:0;bottom:0;height:23px;display:flex;gap:14px;align-items:center;padding:0 10px;background:var(--ui2);border-top:1px solid var(--line);font:11px var(--mono);color:var(--mut);white-space:nowrap;overflow:hidden}
.status .grow{flex:1;text-align:right;font-family:var(--font)}
.status .stfile{font-family:var(--font);font-weight:600;color:var(--fg);max-width:260px;overflow:hidden;text-overflow:ellipsis}
.drop-hint{position:absolute;inset:16px;border:1px dashed var(--acc);display:none;align-items:center;justify-content:center;font-size:16px;color:var(--acc);background:rgba(240,245,250,.85);pointer-events:none}
.viewport.dragover .drop-hint{display:flex}
.loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:12px;background:rgba(250,250,252,.75);font-size:13px}
.hidden{display:none!important}
.spinner{width:20px;height:20px;border:2px solid var(--line2);border-top-color:var(--acc);border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.toast{position:absolute;top:10px;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line2);border-left:3px solid var(--acc);padding:6px 14px;border-radius:2px;box-shadow:0 4px 16px rgba(20,30,45,.18);max-width:80%;white-space:pre-wrap;font-size:12.5px}
.toast.err{border-left-color:#c95f5f}

/* 오른쪽 패널 탭 */
.tabs{display:flex;border-bottom:1px solid var(--line);flex:none;background:var(--ui2)}
.tab{flex:1;background:transparent;border:0;border-bottom:2px solid transparent;padding:7px 4px;cursor:pointer;color:var(--mut)}
.tab:hover{color:var(--fg)}
.tab.active{color:var(--fg);border-bottom-color:var(--acc);background:var(--ui)}
.tabpane{display:none;flex-direction:column;flex:1;min-height:0;overflow:hidden}
.tabpane.active{display:flex}
.tabpane>.hint{margin:8px 10px 0}
.row-btns{display:flex;gap:6px;align-items:center;padding:6px 10px;flex-wrap:wrap}
.summary{padding:8px 10px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);gap:5px}
.summary .kv{background:#fff;border:1px solid var(--line);border-radius:2px;padding:5px 8px}
.summary .k{color:var(--mut);font-size:11px}
.summary .v{font:600 13.5px var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.summary .wide{grid-column:1/-1}
.summary .types-line{font-size:11px;color:var(--mut)}
.table-wrap{overflow:auto;flex:1;min-height:0;border-top:1px solid var(--line)}
.table-wrap.short{flex:0 0 auto;max-height:220px}
.tbl{border-collapse:collapse;width:100%;font-size:12px}
.tbl th{position:sticky;top:0;background:#eef0f3;color:#5a6270;font-weight:600;text-align:left;padding:4px 6px;border-bottom:1px solid var(--line);cursor:pointer;white-space:nowrap}
.tbl td{padding:3px 6px;border-bottom:1px solid #e9ebee;white-space:nowrap;max-width:180px;overflow:hidden;text-overflow:ellipsis}
.tbl td.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums}
.tbl tr:hover td{background:#e9edf2}
.tbl tr.focus td{background:#d7e4f2}
.tbl tbody tr{cursor:pointer}
.prop{padding:8px 10px;overflow:auto;flex:1}
.prop table{width:100%;border-collapse:collapse;font-size:12px}
.prop td{padding:3px 4px;border-bottom:1px solid #e9ebee;vertical-align:top;word-break:break-all}
.prop td:first-child{color:var(--mut);width:38%}
.prop .ttl{font-weight:600;margin:4px 0 8px;font-size:13.5px}
.prop .ttl small{color:var(--mut);font-weight:400}

/* ─ 인트로(도면 열기) 대화상자 ─────────────────── */
.dlg-backdrop{position:fixed;inset:0;background:rgba(30,38,50,.42);display:flex;align-items:center;justify-content:center;z-index:100}
.dlg-backdrop.dragover .dlg{outline:2px dashed var(--acc);outline-offset:-8px}
.dlg{width:min(760px,94vw);background:var(--ui);border:1px solid #a8b0ba;border-radius:4px;box-shadow:0 16px 50px rgba(20,30,45,.30);display:flex;flex-direction:column;overflow:hidden}
.dlg-title{display:flex;justify-content:space-between;align-items:center;background:var(--ui2);padding:7px 6px 7px 12px;border-bottom:1px solid var(--line);font-weight:600;font-size:13px;user-select:none;-webkit-user-select:none}
.dlg-close{background:transparent;border:0;color:var(--mut);font-size:13px;cursor:pointer;padding:2px 8px;border-radius:2px;line-height:1}
.dlg-close:hover{background:#e8c9c9;color:#b03a3a}
.dlg-hero{display:flex;align-items:center;gap:14px;padding:20px 20px 16px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfcfd,var(--ui))}
.dlg-logo{width:40px;height:40px;flex:none;background:var(--acc-d);color:#fff;font:800 12px var(--font);letter-spacing:.5px;display:flex;align-items:center;justify-content:center;border-radius:5px}
.dlg-app{font-weight:700;font-size:17px;color:#1c2026;letter-spacing:.2px}
.dlg-sub{color:var(--mut);font-size:12px;margin-top:2px}
.dlg-body{display:flex;min-height:330px}
.dlg-places{width:172px;flex:none;border-right:1px solid var(--line);background:#eceff2;padding:6px 0;overflow:auto}
.dlg-sec{font-size:11px;color:var(--mut);padding:6px 12px 3px;font-weight:600}
.dlg-places ul{list-style:none;margin:0;padding:0}
.dlg-places li{padding:4px 12px;cursor:pointer;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--fg)}
.dlg-places li:hover{background:var(--hover)}
.dlg-places li.on{background:#d7e4f2;box-shadow:inset 2px 0 0 var(--acc)}
.dlg-drophint{margin:6px 12px;padding:10px;border:1px dashed var(--line2);border-radius:2px;color:var(--mut);font-size:11px;line-height:1.6;text-align:center}
.dlg-main{flex:1;display:flex;flex-direction:column;min-width:0}
.dlg-tools{display:flex;gap:6px;padding:8px;border-bottom:1px solid var(--line)}
.dlg-tools input[type=search]{flex:1}
.dlg-list{flex:1;overflow:auto;max-height:44vh;min-height:180px}
.dlg-tbl{width:100%;border-collapse:collapse;font-size:12.5px}
.dlg-tbl th{position:sticky;top:0;text-align:left;font-weight:600;color:#5a6270;background:#eef0f3;padding:5px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.dlg-tbl td{padding:4px 8px;border-bottom:1px solid #e9ebee;white-space:nowrap}
.dlg-tbl tbody tr{cursor:default}
.dlg-tbl tbody tr:hover{background:#e9edf2}
.dlg-tbl tbody tr.sel{background:#d7e4f2;box-shadow:inset 0 0 0 1px var(--acc)}
.dlg-tbl .nm{display:inline-flex;align-items:center;gap:7px;max-width:100%;overflow:hidden;text-overflow:ellipsis}
.fx{font:600 9.5px var(--mono);color:var(--mut);border:1px solid var(--line2);border-radius:2px;padding:1px 3px;letter-spacing:.5px;flex:none;background:#fff}
.dlg-tbl td.num{text-align:right;font-family:var(--mono);font-variant-numeric:tabular-nums;color:var(--mut)}
.dlg-empty{padding:48px 20px;text-align:center;color:var(--mut);line-height:1.8}
.dlg-foot{display:flex;gap:8px;align-items:center;padding:9px 10px;border-top:1px solid var(--line);background:#eceff2}
.dlg-foot .grow{flex:1}
.dlg-file-label{display:flex;align-items:center;gap:6px;color:var(--mut);white-space:nowrap}
#dlgName{width:220px;background:#fff;border:1px solid #c8cdd3;border-radius:2px;padding:3px 6px;color:var(--fg)}