:root{--navy:#071f53;--gold:#d99612;--shadow:0 10px 35px rgba(0,0,0,.22)}
*{box-sizing:border-box}html,body{margin:0;height:100%;background:#e8e8e3;font-family:Arial,Helvetica,sans-serif;color:#111}
body{overflow:hidden}#app{height:100%;display:grid;grid-template-rows:52px 1fr 54px}
.appbar{background:var(--navy);color:#fff;display:flex;align-items:center;padding:0 12px;gap:12px;z-index:20}
.apptitle{font-weight:700;flex:1}.iconbtn,.installbtn,.toolbar button{border:0;background:transparent;color:inherit;font:inherit;cursor:pointer}
.iconbtn{font-size:26px;line-height:1;padding:6px 10px}.installbtn{border:1px solid rgba(255,255,255,.65);border-radius:7px;padding:6px 10px}
.viewer{display:grid;place-items:center;padding:16px;overflow:auto}.page-wrap{position:relative;width:min(78vh,92vw);aspect-ratio:1/1;background:#fff;box-shadow:var(--shadow)}
#pageImage{width:100%;height:100%;display:block;object-fit:contain;user-select:none}
.toolbar{background:#fff;border-top:1px solid #ccc;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 10px}
.toolbar button{color:var(--navy);font-weight:700;padding:10px}.toolbar button:last-child{text-align:right}#pageCounter{font-size:13px;color:#555}
.drawer{position:fixed;left:0;top:0;bottom:0;width:min(380px,88vw);background:#fff;z-index:50;transform:translateX(-102%);transition:.2s;box-shadow:8px 0 25px rgba(0,0,0,.2);overflow:auto}
.drawer.open{transform:translateX(0)}.drawer-head{height:56px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 12px 0 18px}
.navitem{width:100%;border:0;border-bottom:1px solid #eee;background:#fff;text-align:left;padding:13px 16px;font-size:14px;cursor:pointer;display:flex;gap:10px;align-items:flex-start}
.navitem:hover{background:#f5f5f5}.navitem span{font-weight:800;color:var(--gold);min-width:22px}
.scrim{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:40;opacity:0;pointer-events:none;transition:.2s}.scrim.show{opacity:1;pointer-events:auto}
.hotspot{position:absolute;background:transparent;border:0;cursor:pointer}.brief-to-ia{right:0;top:0;width:25%;height:28%}.ia-to-brief{left:0;top:0;width:26%;height:28%}.contents-hotspot{left:0;bottom:0;width:100%;height:10%}
@media(max-width:650px){#app{grid-template-rows:50px 1fr 52px}.viewer{padding:8px}.page-wrap{width:min(88vh,96vw)}}