:root{
  --ink:#1c2230; --ink-soft:#5c6675; --line:#d9dee6; --line-soft:#eef1f5;
  --bg:#f4f6f9; --panel:#ffffff; --red:#e5342b; --red-soft:#fdecea;
  --blue:#1769ff; --green:#0aa06e; --amber:#f5a300;
  --hi:#fff6d6; --shadow:0 1px 2px rgba(20,30,50,.06),0 4px 16px rgba(20,30,50,.06);
  --mono:"SFMono-Regular",ui-monospace,Consolas,"Roboto Mono",monospace;
  --sans:system-ui,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);display:flex;flex-direction:column;overflow:hidden}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;color:var(--ink)}

/* ===== top bar ===== */
#topbar{display:flex;align-items:center;gap:18px;padding:8px 16px;background:var(--panel);
  border-bottom:1px solid var(--line);box-shadow:var(--shadow);z-index:5;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:34px;height:34px;border-radius:8px;background:var(--red);color:#fff;font-weight:700;
  display:grid;place-items:center;font-size:19px;box-shadow:0 2px 6px rgba(229,52,43,.35)}
.brand-txt{display:flex;flex-direction:column;line-height:1.15}
.brand-txt strong{font-size:16px;letter-spacing:.3px}
.brand-txt .tag{font-size:11px;color:var(--ink-soft)}
.proj-meta{display:flex;gap:10px;align-items:center;margin-left:6px;flex-wrap:wrap}
.proj-meta label{font-size:11px;color:var(--ink-soft);display:flex;flex-direction:column;gap:2px}
.proj-meta input,.proj-meta select{border:1px solid var(--line);border-radius:6px;padding:4px 7px;font-size:12px;background:#fff}
.proj-meta input#projName{width:190px}
.top-actions{margin-left:auto;display:flex;gap:7px}
.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:7px 12px;border-radius:7px;font-size:12.5px;
  font-weight:600;transition:.12s}
.btn:hover{border-color:#b9c2ce;background:#fbfcfe}
.btn-primary{background:var(--red);border-color:var(--red);color:#fff}
.btn-primary:hover{background:#cf2b23;border-color:#cf2b23}
.btn-ghost{color:var(--ink-soft);font-weight:500}
.btn-small{padding:5px 9px;font-size:11.5px;border-radius:6px}

/* ===== main ===== */
main{flex:1;display:flex;min-height:0}
#tools{width:132px;background:var(--panel);border-right:1px solid var(--line);padding:12px 10px;
  display:flex;flex-direction:column;gap:14px;overflow-y:auto}
.tool-group{display:flex;flex-direction:column;gap:6px}
.tg-title{font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:var(--ink-soft);font-weight:700}
.tbtn{border:1px solid var(--line);background:#fff;border-radius:7px;padding:7px 8px;font-size:12.5px;text-align:center;
  transition:.12s;color:var(--ink)}
.tbtn:hover{border-color:#b9c2ce;background:#fbfcfe}
.tbtn.as-label{display:block}
.tool.active{border-color:var(--red);background:var(--red-soft);color:var(--red);font-weight:700}
.swatches{display:flex;gap:6px}
.sw{width:24px;height:24px;border-radius:50%;background:var(--c);border:2px solid #fff;
  box-shadow:0 0 0 1px var(--line);cursor:pointer}
.sw.active{box-shadow:0 0 0 2px var(--ink)}
.tool-group.hint ol{margin:2px 0 0;padding-left:16px;font-size:11px;color:var(--ink-soft);line-height:1.6}
.tool-group.hint b{color:var(--ink)}

/* ===== canvas ===== */
#stageWrap{flex:1;position:relative;background:
   repeating-linear-gradient(0deg,transparent,transparent 23px,rgba(140,150,165,.08) 23px,rgba(140,150,165,.08) 24px),
   repeating-linear-gradient(90deg,transparent,transparent 23px,rgba(140,150,165,.08) 23px,rgba(140,150,165,.08) 24px),
   #eef1f5;overflow:hidden}
#stageHost{position:absolute;inset:0}
#stageHost .konvajs-content{margin:auto}
.empty{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.empty-inner{text-align:center;color:var(--ink-soft);max-width:420px}
.empty-inner .big{font-size:64px;color:#cfd6e0;font-weight:700;margin-bottom:6px}
.empty-inner p{margin:6px 0;font-size:14px}
.empty-inner .sub{font-size:12px;color:#9aa4b2}
#imgTabs{position:absolute;left:10px;bottom:10px;display:flex;gap:6px;flex-wrap:wrap;max-width:70%}
.imgtab{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:6px;padding:4px 9px;font-size:11px;
  cursor:pointer;box-shadow:var(--shadow);display:flex;align-items:center;gap:6px}
.imgtab.active{border-color:var(--red);color:var(--red);font-weight:700}
.imgtab .x{color:#b9c2ce;font-weight:700}
.imgtab .x:hover{color:var(--red)}

/* ===== side / issues ===== */
#side{width:320px;background:var(--panel);border-left:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:11px 14px;border-bottom:1px solid var(--line)}
.side-head b{color:var(--red)}
#issueList{overflow-y:auto;max-height:38%;border-bottom:1px solid var(--line-soft)}
.iitem{display:flex;gap:9px;align-items:flex-start;padding:9px 14px;border-bottom:1px solid var(--line-soft);cursor:pointer}
.iitem:hover{background:#fafbfd}
.iitem.active{background:var(--red-soft)}
.iitem .num{width:22px;height:22px;flex:none;border-radius:6px;background:var(--ink);color:#fff;font-size:11px;
  display:grid;place-items:center;font-weight:700;font-family:var(--mono)}
.iitem.active .num{background:var(--red)}
.iitem .meta{min-width:0;flex:1}
.iitem .ins{font-size:12.5px;line-height:1.35;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.iitem .sub2{font-size:10.5px;color:var(--ink-soft);margin-top:2px;display:flex;gap:6px;flex-wrap:wrap}
.badge{border-radius:4px;padding:1px 5px;font-size:10px;font-weight:700}
.b-open{background:#eef1f5;color:#5c6675}
.b-check{background:#fff3d6;color:#a06a00}
.b-done{background:#e2f6ee;color:#0a7d55}
.b-rejected{background:#f1f1f4;color:#9aa4b2;text-decoration:line-through}
.b-high{background:var(--red-soft);color:var(--red)}
.b-med{background:#eaf1ff;color:var(--blue)}
.b-low{background:#eef1f5;color:#5c6675}

/* ===== issue form ===== */
.issue-form{padding:12px 14px;overflow-y:auto;display:flex;flex-direction:column;gap:9px}
.issue-form.hidden,.hidden{display:none}
.if-row{display:flex;align-items:center;justify-content:space-between}
.pill{font-family:var(--mono);font-size:12px;background:var(--ink);color:#fff;padding:3px 9px;border-radius:6px;font-weight:700}
.status-sel{border:1px solid var(--line);border-radius:6px;padding:4px 7px;font-size:12px;background:#fff}
.if-lab{display:flex;flex-direction:column;gap:3px;font-size:11px;color:var(--ink-soft);font-weight:600}
.if-lab .key{color:var(--red);font-weight:700;font-size:10px}
.if-lab input,.if-lab select,.if-lab textarea{border:1px solid var(--line);border-radius:6px;padding:6px 8px;font-size:12.5px;
  background:#fff;color:var(--ink);resize:vertical;font-weight:400}
.if-lab textarea{line-height:1.45}
.if-lab input:focus,.if-lab textarea:focus,.if-lab select:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px var(--red-soft)}
.if-actions{display:flex;gap:8px;margin-top:4px}

/* ===== toast ===== */
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);opacity:0;
  background:var(--ink);color:#fff;padding:10px 18px;border-radius:8px;font-size:13px;pointer-events:none;
  transition:.22s;z-index:50;box-shadow:0 6px 24px rgba(20,30,50,.25)}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:900px){
  #tools{width:104px}
  #side{width:100%;position:fixed;right:0;top:0;bottom:0;max-width:340px;box-shadow:-8px 0 30px rgba(0,0,0,.15);
    transform:translateX(100%);transition:.2s;z-index:20}
  #side.open{transform:translateX(0)}
}