:root{
  --blue:#1769ff;
  --blue-dark:#0f4fc4;
  --orange:#ff7a18;
  --orange-dark:#d95f07;
  --bg:#f6f9ff;
  --card:#ffffff;
  --text:#0b1220;
  --muted:#586174;
  --border:#e6e9f2;
  --shadow: 0 10px 24px rgba(11,18,32,.10);
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);
background:linear-gradient(180deg,#ffffff 0%, var(--bg) 100%)}
a{color:inherit}
.topbar{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.86);backdrop-filter:saturate(140%) blur(10px);
border-bottom:1px solid var(--border)}
.container{max-width:1180px;margin:0 auto;padding:18px 16px}
.brand{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.logo{width:40px;height:40px;border-radius:12px;background:conic-gradient(from 210deg,var(--blue),var(--orange),var(--blue));
box-shadow:0 8px 20px rgba(23,105,255,.25)}
.brand h1{margin:0;font-size:20px;letter-spacing:.2px}
.brand p{margin:0;color:var(--muted);font-size:13px}
.controls{display:grid;grid-template-columns:1.2fr .6fr .6fr auto;gap:10px;margin-top:14px}
.input,select{width:100%;border:1px solid var(--border);background:#fff;padding:12px;border-radius:12px;outline:none;font-size:14px}
.input:focus,select:focus{border-color:rgba(23,105,255,.55);box-shadow:0 0 0 4px rgba(23,105,255,.12)}
.btn{border:0;padding:12px 14px;border-radius:12px;cursor:pointer;color:#fff;
background:linear-gradient(135deg,var(--blue) 0%, var(--orange) 100%);
box-shadow:0 10px 22px rgba(23,105,255,.20);font-weight:700}
.btn:active{transform:translateY(1px)}
.hero{padding:26px 0 6px}
.hero .card{background:linear-gradient(135deg, rgba(23,105,255,.10) 0%, rgba(255,122,24,.10) 100%);
border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.kpis{display:flex;gap:16px;flex-wrap:wrap;margin-top:12px}
.kpi{background:#fff;border:1px solid var(--border);border-radius:14px;padding:10px 12px;min-width:160px}
.kpi .num{font-size:18px;font-weight:900}
.kpi .lbl{font-size:12px;color:var(--muted)}
.section{margin:22px 0 26px}
.section-header{display:flex;align-items:end;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:0 0 12px}
.section-header h2{margin:0;font-size:18px}
.section-header .meta{color:var(--muted);font-size:12px}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.book{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);
overflow:hidden;display:flex;flex-direction:column;min-height:340px}
.book:hover{transform:translateY(-2px);transition:.15s ease;box-shadow:0 14px 34px rgba(11,18,32,.14)}
.cover-wrap{background:linear-gradient(135deg, rgba(23,105,255,.16), rgba(255,122,24,.16));
height:170px;display:flex;align-items:center;justify-content:center}
.cover{max-height:160px;max-width:90%;border-radius:12px;box-shadow:0 10px 20px rgba(11,18,32,.18);background:#fff}
.cover-fallback{display:none;font-weight:800;color:var(--blue-dark);text-decoration:none;border:1px dashed rgba(23,105,255,.55);
padding:10px 12px;border-radius:12px;background:rgba(255,255,255,.65)}
.body{padding:12px 12px 14px;display:flex;flex-direction:column;gap:10px;flex:1}
.title{font-weight:900;font-size:14px;line-height:1.25;margin:0}
.subtitle{margin:0;color:var(--muted);font-size:12px;line-height:1.35;max-height:3.9em;overflow:hidden}
.badges{display:flex;gap:6px;flex-wrap:wrap}
.badge{font-size:11px;padding:6px 8px;border-radius:999px;border:1px solid var(--border);background:#fff;color:var(--muted)}
.badge.primary{border-color:rgba(255,122,24,.35);background:rgba(255,122,24,.10);color:var(--orange-dark)}
.badge.blue{border-color:rgba(23,105,255,.35);background:rgba(23,105,255,.10);color:var(--blue-dark)}
.details{margin-top:auto;display:grid;gap:6px}
.row{display:flex;gap:8px;font-size:12px;color:var(--muted)}
.row b{color:var(--text);font-weight:800}
.actions{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.linkbtn{text-decoration:none;font-size:12px;font-weight:800;padding:9px 10px;border-radius:12px;border:1px solid var(--border);background:#fff}
.linkbtn.primary{border-color:rgba(23,105,255,.35);background:rgba(23,105,255,.10);color:var(--blue-dark)}
.notice{border:1px solid var(--border);border-radius:14px;padding:12px;background:#fff;color:var(--muted);font-size:13px}
.footer{margin:40px 0 18px;color:var(--muted);font-size:12px;text-align:center}
@media (max-width:1050px){.grid{grid-template-columns:repeat(3,minmax(0,1fr));}.controls{grid-template-columns:1fr 1fr}}
@media (max-width:680px){.grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:460px){.grid{grid-template-columns:1fr;}}

/* --- Branding + About/FAQ section --- */
.logo { width:56px; height:56px; border-radius:16px; object-fit:contain; background:#fff; }
.info { padding: 34px 0 50px; }
.info-head { display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; margin: 18px 0; }
.lang-tabs { display:flex; gap:10px; }
.lang-tabs .tab { border:0; padding:.55rem .9rem; border-radius:999px; cursor:pointer; background:rgba(0,0,0,.06); font-weight:600; }
.lang-tabs .tab.active { background: linear-gradient(135deg, #1E6BFF, #FF7A18); color:#fff; }
.tab-panel { display:none; }
.tab-panel.active { display:block; }
.info-grid { display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap:16px; }
.card-lite { background:#fff; border:1px solid rgba(0,0,0,.06); border-radius:18px; padding:16px; box-shadow: 0 10px 30px rgba(0,0,0,.05); }
.card-lite h3 { margin:0 0 10px 0; }
.card-lite p { margin:0 0 10px 0; line-height:1.6; }
.card-lite ul { margin:0; padding-left: 18px; }
.faq { margin-top: 18px; background:#fff; border:1px solid rgba(0,0,0,.06); border-radius:18px; padding:16px; box-shadow: 0 10px 30px rgba(0,0,0,.05); }
.faq h3 { margin: 0 0 10px 0; }
.faq-item { border-top: 1px solid rgba(0,0,0,.08); padding: 10px 0; }
.faq-item:first-of-type { border-top: 0; }
.faq-item summary { cursor:pointer; font-weight:700; list-style:none; }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-answer { margin-top:8px; opacity:.95; }
@media (max-width: 900px){
  .info-grid { grid-template-columns: 1fr; }
}