:root{
  --bg:#eef4fb;
  --panel:#ffffff;
  --panel2:#f7fbff;
  --text:#182232;
  --muted:#66758a;
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --accent:#0ea5e9;
  --danger:#ef4444;
  --danger-bg:#fff1f2;
  --border:#d8e3f2;
  --shadow:0 14px 36px rgba(26,47,80,.12);
  --radius:16px;
  --footer-blue:#1565c0;
}
*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#f8fbff 0%,var(--bg) 100%);
}
button,input,select{font:inherit;}
button{
  border:1px solid transparent;
  border-radius:12px;
  padding:10px 14px;
  cursor:pointer;
  background:#fff;
  color:var(--text);
  transition:transform .04s ease,background .15s ease,border-color .15s ease,box-shadow .15s ease;
}
button:hover{border-color:#b9cff4;box-shadow:0 5px 16px rgba(37,99,235,.12);}
button:active{transform:translateY(1px);}
button:disabled{opacity:.45;cursor:not-allowed;box-shadow:none;}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700;}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);}
.btn-danger{background:var(--danger-bg);border-color:#fecdd3;color:#dc2626;font-weight:700;}
.btn-ghost{background:#f8fbff;border-color:var(--border);}
.btn-small{padding:7px 10px;border-radius:10px;font-size:.86rem;}
.app-shell{min-height:100%;display:flex;flex-direction:column;}
.app-header{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 24px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.86);backdrop-filter:blur(10px);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:14px;min-width:0;}
.logo{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,#60a5fa,#2563eb);display:grid;place-items:center;box-shadow:0 10px 26px rgba(37,99,235,.25);}
.logo svg{width:28px;height:28px;}
h1{margin:0;font-size:clamp(1.2rem,2.2vw,1.85rem);letter-spacing:.02em;}
.subtitle{margin:4px 0 0;color:var(--muted);font-size:.92rem;}
.header-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end;}
.main-layout{
  flex:1;
  display:grid;
  grid-template-columns:260px minmax(0,1fr) 360px;
  gap:16px;
  padding:16px;
  min-height:0;
}
.side-panel,.right-panel,.viewer-panel,.toolbar-card{
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.side-panel{padding:14px;align-self:start;position:sticky;top:96px;}
.panel-title{font-size:.96rem;font-weight:800;margin:0 0 10px;}
.file-card{border:1px dashed #b8c7dd;background:var(--panel2);border-radius:14px;padding:12px;margin-bottom:12px;}
.file-card label{display:block;font-weight:700;margin-bottom:8px;}
input[type=file]{width:100%;font-size:.9rem;}
.meta{font-size:.82rem;color:var(--muted);line-height:1.5;margin-top:8px;word-break:break-all;}
.tool-list{display:grid;gap:8px;margin-bottom:12px;}
.tool-btn{width:100%;text-align:left;display:flex;align-items:center;gap:10px;}
.tool-btn.active{background:#eff6ff;border-color:#93c5fd;color:#1d4ed8;font-weight:800;}
.tool-icon{width:22px;text-align:center;}
.setting-group{display:grid;gap:8px;border-top:1px solid var(--border);padding-top:12px;margin-top:12px;}
.setting-row{display:grid;gap:5px;font-size:.86rem;color:var(--muted);}
.setting-row input[type=range]{width:100%;}
.hint-box{background:#f8fafc;border:1px solid var(--border);border-radius:12px;padding:10px;font-size:.82rem;color:#475569;line-height:1.6;margin-top:12px;}
.viewer-panel{min-width:0;display:flex;flex-direction:column;min-height:calc(100vh - 154px);overflow:hidden;}
.toolbar{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;padding:12px;border-bottom:1px solid var(--border);background:#fbfdff;}
.toolbar-section{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.toolbar-section strong{font-size:.9rem;}
.page-input{width:72px;padding:9px 10px;border:1px solid var(--border);border-radius:10px;text-align:center;background:#fff;}
select{padding:9px 10px;border:1px solid var(--border);border-radius:10px;background:#fff;}
.viewer-body{position:relative;flex:1;min-height:520px;background:#dce7f4;overflow:auto;}
.empty-state{height:100%;display:grid;place-items:center;padding:28px;text-align:center;color:#64748b;}
.empty-card{max-width:520px;background:rgba(255,255,255,.76);border:1px solid rgba(255,255,255,.9);border-radius:20px;padding:24px;box-shadow:0 12px 34px rgba(30,64,175,.12);}
.empty-card .big{font-size:3rem;line-height:1;margin-bottom:10px;}
.page-layer{
  position:relative;
  margin:28px auto;
  background:#fff;
  box-shadow:0 12px 34px rgba(15,23,42,.22);
  display:none;
}
#pdfCanvas{display:block;background:#fff;}
#selectionOverlay{position:absolute;inset:0;cursor:crosshair;touch-action:none;}
.selection-rect{position:absolute;border:2px dashed #2563eb;background:rgba(37,99,235,.11);display:none;pointer-events:none;}
.selection-rect::before,.selection-rect::after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:#2563eb;}
.selection-rect::before{left:-5px;top:-5px;}.selection-rect::after{right:-5px;bottom:-5px;}
.float-actions{position:sticky;bottom:12px;display:flex;gap:8px;justify-content:center;pointer-events:none;padding:8px;}
.float-actions-inner{display:flex;gap:8px;padding:8px;background:rgba(15,23,42,.78);backdrop-filter:blur(8px);border-radius:999px;pointer-events:auto;box-shadow:0 12px 30px rgba(15,23,42,.25);}
.float-actions .btn-primary{border-radius:999px;}
.float-actions .btn-ghost{border-radius:999px;background:#fff;}
.right-panel{display:flex;flex-direction:column;min-height:calc(100vh - 154px);overflow:hidden;}
.clip-head{padding:14px;border-bottom:1px solid var(--border);display:grid;gap:10px;background:#fbfdff;}
.clip-head-top{display:flex;align-items:center;justify-content:space-between;gap:10px;}
.clip-count{font-weight:900;}
.clip-actions{display:flex;gap:8px;flex-wrap:wrap;}
.clip-list{padding:12px;overflow:auto;display:grid;gap:10px;align-content:start;}
.clip-empty{padding:24px;text-align:center;color:#64748b;border:1px dashed var(--border);border-radius:14px;background:#f8fbff;line-height:1.6;}
.clip-card{display:grid;grid-template-columns:116px 1fr;gap:10px;border:1px solid var(--border);border-radius:14px;background:#fff;padding:10px;box-shadow:0 6px 18px rgba(30,64,175,.08);}
.clip-thumb{width:116px;height:82px;border:1px solid var(--border);border-radius:10px;background:#f1f5f9;object-fit:contain;}
.clip-info{min-width:0;display:grid;gap:5px;align-content:start;}
.clip-title{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.clip-sub{font-size:.8rem;color:var(--muted);line-height:1.4;}
.clip-buttons{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px;}
.status-bar{border-top:1px solid var(--border);background:#f8fbff;color:#475569;font-size:.86rem;line-height:1.5;padding:9px 14px;min-height:38px;}
.modal{border:none;border-radius:18px;padding:0;max-width:760px;width:min(92vw,760px);box-shadow:0 24px 70px rgba(15,23,42,.35);}
.modal::backdrop{background:rgba(15,23,42,.55);}
.modal-inner{padding:20px;background:#fff;}
.modal-inner h2{margin:0 0 10px;}
.modal-inner p{line-height:1.8;color:#475569;}
.modal-inner ul{line-height:1.9;color:#475569;padding-left:1.3em;}
.modal-actions{text-align:right;margin-top:14px;}
.site-footer{font-size:.84rem;text-align:center;color:var(--footer-blue);background:#f8fbff;border-top:1px solid var(--border);padding:8px 10px;}
.site-footer a{color:var(--footer-blue);text-decoration:none;font-weight:800;}
.site-footer a:hover{color:#0d47a1;}
.ad-panel{max-width:980px;margin:12px auto 8px;border:1px solid #d7e6f8;border-radius:12px;background:#fff;overflow:hidden;}
.ad-panel[hidden]{display:none!important;margin:0!important;padding:0!important;border:0!important;height:0!important;overflow:hidden!important;}
.ad-panel-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:5px 8px;background:#f4f8ff;border-bottom:1px solid #d7e6f8;}
.ad-label{font-size:.72rem;color:#4f6f91;line-height:1;}
.ad-wait{font-size:.72rem;color:#5f7185;margin-left:auto;}
.ad-close-btn{margin:0!important;padding:3px 8px!important;min-height:0;height:auto;line-height:1.2;border:none;border-radius:999px;background:#1565c0;color:#fff;font-size:.72rem!important;font-weight:700;cursor:pointer;appearance:none;-webkit-appearance:none;display:none;}
.ad-close-btn:hover{background:#0d47a1;}
.ad-body{padding:8px;background:#fff;min-height:70px;}
@media (max-width:1180px){
  .main-layout{grid-template-columns:230px minmax(0,1fr);}
  .right-panel{grid-column:1 / -1;min-height:360px;}
  .side-panel{position:static;}
  .viewer-panel{min-height:640px;}
}
@media (max-width:760px){
  .app-header{position:static;align-items:flex-start;flex-direction:column;padding:14px;}
  .header-actions{width:100%;justify-content:flex-start;}
  .main-layout{display:flex;flex-direction:column;padding:10px;}
  .toolbar{grid-template-columns:1fr;}
  .viewer-body{min-height:460px;}
  .side-panel,.right-panel,.viewer-panel{min-height:auto;}
  .clip-card{grid-template-columns:96px 1fr;}
  .clip-thumb{width:96px;height:72px;}
}