:root{
  --blue:#2f5f9f;
  --line:#cfd5dc;
  --text:#2d3136;
  --accent:#2767b1;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:"Yu Gothic UI","Meiryo",system-ui,sans-serif;color:var(--text);overflow:hidden;background:#20242a}
body{display:flex;flex-direction:column}
.titlebar{height:52px;flex:0 0 52px;background:var(--blue);color:white;display:flex;align-items:center;padding:0 18px;gap:20px;border-bottom:1px solid rgba(255,255,255,.15)}
.brand{font-size:18px;font-weight:700;letter-spacing:.02em}
.site-links{display:flex;align-items:center;gap:6px;margin-left:14px;min-width:0}
.site-links-label{font-size:11px;opacity:.72;white-space:nowrap}
.site-links a{display:inline-flex;align-items:center;height:28px;padding:0 9px;border:1px solid rgba(255,255,255,.25);border-radius:6px;color:#fff;text-decoration:none;font-size:12px;white-space:nowrap;background:rgba(255,255,255,.07)}
.site-links a:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.45)}
.file-name{margin-left:auto;font-size:13px;opacity:.9;max-width:32vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ribbon{flex:0 0 auto;min-height:118px;background:linear-gradient(#fafafa,#f0f1f3);border-bottom:1px solid #bcc4cc;display:flex;align-items:stretch;gap:0;padding:6px 8px 0;overflow-x:auto;overflow-y:hidden}
.group{display:flex;flex-direction:column;justify-content:space-between;padding:0 8px;border-right:1px solid #d1d6db;min-width:max-content}
.group-tools{display:flex;align-items:flex-start;gap:4px;min-height:76px}
.tool-grid{display:grid;grid-template-columns:repeat(3,72px);grid-auto-rows:58px;gap:6px 6px;align-content:start;min-height:76px}
.group-file .tool-grid,.group-basic .tool-grid,.group-object .tool-grid{grid-template-columns:repeat(3,78px);grid-auto-rows:58px}
.group-draw .tool-grid,.group-view .tool-grid{grid-template-columns:repeat(3,72px)}
.group-tools.controls{flex-direction:column;justify-content:flex-start;align-items:stretch;gap:6px;min-width:190px;padding-top:2px}
.group-label{text-align:center;font-size:12px;color:#56616d;height:23px;line-height:23px}
.tool{appearance:none;border:1px solid transparent;background:transparent;border-radius:3px;width:100%;height:58px;padding:4px 5px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:#4e555c;font:inherit;cursor:pointer;user-select:none}
.tool:hover:not(:disabled){background:#e5edf8;border-color:#aebfd5}
.tool.active{background:#d9e7f7;border-color:#8faaca;color:#1d4f89}
.tool:disabled{opacity:.38;cursor:default}
.tool.accent{background:#e4eefb;border-color:#9cb6d7;color:#1f568f}
.tool.danger:hover:not(:disabled){background:#fae9e9;border-color:#dcb0b0;color:#9c3333}
.tool-blank{border:0!important;background:transparent!important;cursor:default!important;pointer-events:none}
.ico{font-size:22px;line-height:22px;font-family:Arial,sans-serif}
.textico{font-weight:700}
.tool span:last-child{font-size:11px;white-space:nowrap;line-height:1.1;text-align:center}
.control-label{display:flex;align-items:center;gap:7px;font-size:12px;white-space:nowrap}
.control-label select{height:28px;max-width:110px}
#colorInput{width:44px;height:28px;padding:1px;border:1px solid #b8c0c8;border-radius:3px;background:white}
#widthInput,#arrowHeadInput{width:92px}
#widthValue,#arrowHeadValue{display:inline-block;width:24px;text-align:right}
.viewer{position:relative;flex:1 1 auto;min-height:0;background:#171a1f;overflow:hidden;outline:none;touch-action:none;cursor:grab}
.viewer.drawing{cursor:crosshair}.viewer.erasing{cursor:not-allowed}
#panoCanvas,#overlayCanvas{position:absolute;inset:0;width:100%;height:100%;display:block}#overlayCanvas{pointer-events:none}
.empty-state{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#f4f6f8;text-align:center;background:radial-gradient(circle at center,#333b46 0,#20252c 55%,#171a1f 100%)}
.empty-icon{font-size:44px;font-weight:800;letter-spacing:-.05em;margin-bottom:10px}.empty-title{font-size:19px;font-weight:700}.empty-sub{font-size:13px;opacity:.7;margin:7px 0 5px}
.empty-privacy{font-size:11px;opacity:.55;margin:0 0 18px}
.center-open{border:1px solid rgba(255,255,255,.45);background:#fff;color:#2e5f9f;font-weight:700;border-radius:5px;padding:9px 18px;cursor:pointer}
.hint{position:absolute;left:12px;bottom:12px;background:rgba(0,0,0,.56);color:#fff;padding:6px 9px;border-radius:4px;font-size:12px;pointer-events:none;backdrop-filter:blur(3px)}
.status{position:absolute;right:12px;bottom:12px;background:rgba(0,0,0,.56);color:#fff;padding:6px 9px;border-radius:4px;font-size:12px;pointer-events:none;max-width:50%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.text-editor{position:absolute;z-index:20;min-width:240px;max-width:320px;background:rgba(255,255,255,.98);border:1px solid #bfc9d5;border-radius:10px;box-shadow:0 10px 24px rgba(0,0,0,.18);padding:10px;pointer-events:auto}
.text-editor-title{font-size:12px;font-weight:700;color:#44515f;margin-bottom:6px}
.text-editor-input{width:100%;height:34px;border:1px solid #bcc6d2;border-radius:6px;padding:0 10px;font:inherit}
.text-editor-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:8px}
.text-editor-btn{height:32px;padding:0 12px;border-radius:6px;border:1px solid #b8c3cf;background:#fff;color:#33414f;cursor:pointer;font:inherit}
.text-editor-btn.primary{background:#2f5f9f;border-color:#2f5f9f;color:#fff}
.hidden{display:none!important}
.context-action:disabled{visibility:hidden}.context-action:not(:disabled){visibility:visible}
@media(max-width:900px){
  .titlebar{height:44px;flex-basis:44px;padding:0 10px}.brand{font-size:16px}
  .site-links{margin-left:6px;gap:3px}.site-links-label{display:none}.site-links a{height:26px;padding:0 6px;font-size:10px}.file-name{display:none}
  .ribbon{min-height:96px;padding-left:3px}.group{padding:0 4px}
  .tool-grid{grid-template-columns:repeat(3,62px);grid-auto-rows:54px;gap:4px}
  .group-file .tool-grid,.group-basic .tool-grid,.group-object .tool-grid{grid-template-columns:repeat(3,66px);grid-auto-rows:54px}
  .tool{height:54px;padding:3px 4px}.ico{font-size:18px;line-height:18px}.tool span:last-child{font-size:10px}.group-tools{min-height:60px}.group-label{height:20px;line-height:20px;font-size:10px}
}