:root { --bg:#0f172a; --panel:#111827; --muted:#e5e7eb; --accent:#3b82f6; --accent2:#60a5fa; }
*{box-sizing:border-box} html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--muted);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;background:linear-gradient(180deg,rgba(17,24,39,.9),rgba(17,24,39,.6));position:sticky;top:0;z-index:50;backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,.06)}
header .title{display:flex;align-items:center;gap:10px;font-weight:600}
header .title .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent2)}
.controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.controls button,.controls input[type=number]{background:#0b1220;color:var(--muted);border:1px solid rgba(255,255,255,.08);border-radius:10px;padding:8px 10px;cursor:pointer;font-size:14px;line-height:1}
.controls button:hover{border-color:var(--accent2)} .controls .sep{width:1px;height:28px;background:rgba(255,255,255,.08);margin:0 4px}
.status{opacity:.85;font-size:14px}.link{color:var(--accent2);text-decoration:none}.link:hover{text-decoration:underline}
#wrap{display:grid;grid-template-rows:1fr auto;width:100%;height:calc(100% - 64px);padding:2vh 2vw 3vh}
#flipRoot{display:grid;place-items:center;width:100%;height:100%;position:relative}
#flipbook{width:min(92vw,1400px);height:min(82vh,1100px);background:#0b1220;border-radius:18px;box-shadow:0 10px 30px rgba(0,0,0,.45),inset 0 0 0 1px rgba(255,255,255,.06);overflow:hidden;position:relative}
#loader{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(1200px 800px at 50% 30%,rgba(59,130,246,.08),rgba(0,0,0,0)),rgba(11,18,32,.96);z-index:20}
.progress{display:grid;gap:8px;width:min(420px,80vw);text-align:center}
.progress h2{margin:0;font-size:16px;font-weight:600;letter-spacing:.2px}
.bar{width:100%;height:10px;background:rgba(255,255,255,.08);border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.06)}
.bar>span{display:block;height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .2s ease}
footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 16px;opacity:.8;font-size:13px}