/* ============================================================
   THƯ VIỆN TIÊN HIỆP — theme mực · vàng · chu sa  (v2 immersive)
   Giữ nguyên tên class để app.js/bo.html chạy không đổi.
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;600;700&family=Noto+Serif:wght@400;600&family=Ma+Shan+Zheng&display=swap');

:root{
  --ink:#0e0b07; --ink2:#171109; --ink3:#1f1810; --panel:#1c150d; --panel2:#241b10;
  --line:#3b2f1c; --line2:#52401f; --line-gold:#6b521f;
  --gold:#c9a227; --gold2:#e7cd84; --gold3:#f3e6bf; --gold-soft:#9c7c2b;
  --chu:#b0411f; --chu2:#d65a33;            /* chu sa - cinnabar (ấn triện) */
  --jade:#5a8c73;
  --text:#ece0c6; --muted:#a8966f; --muted2:#7d6c4c;
  --paper:#f4ead2; --paper2:#efe2c4; --paper-ink:#2a2014; --paper-line:#d9c79b;
  --major:#e7b53e; --normal:#7fa6c4; --minor:#9aa882;
  --radius:14px; --radius-sm:9px; --maxw:1200px;
  --display:'Playfair Display',Georgia,serif;
  --serif:'Noto Serif',Georgia,'Times New Roman',serif;
  --han:'Ma Shan Zheng',serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",sans-serif;
}
*{box-sizing:border-box}
*,*::before,*::after{min-width:0}                 /* CHỐNG TRÀN: flex/grid item co được */
html,body{margin:0;padding:0}
body{
  font-family:var(--serif);color:var(--text);line-height:1.7;min-height:100vh;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(201,162,39,.10), transparent 60%),
    radial-gradient(900px 480px at 8% 4%, rgba(90,140,115,.07), transparent 55%),
    radial-gradient(1200px 700px at 50% 120%, rgba(176,65,31,.06), transparent 60%),
    #0e0b07;
}
/* texture giấy mờ phủ toàn trang */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}
/* CHỐNG TRÀN VIỀN — toàn cục */
img,svg,video,canvas{max-width:100%;height:auto}
h1,h2,h3,h4,p,span,a,div,li,td,button,input,textarea,select{overflow-wrap:anywhere;word-break:break-word}
a{color:var(--gold2);text-decoration:none}
a:hover{color:var(--gold3);text-decoration:underline}
::selection{background:#5a4413;color:#fff}

*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-thumb{background:#3a2f1c;border-radius:8px}
*::-webkit-scrollbar-thumb:hover{background:#52401f}
*::-webkit-scrollbar-track{background:transparent}

/* ---------- nét vàng trang trí ---------- */
.goldrule{height:1px;border:0;background:linear-gradient(90deg,transparent,var(--line-gold),var(--gold),var(--line-gold),transparent);margin:0}
.flourish{display:flex;align-items:center;justify-content:center;gap:14px;color:var(--gold-soft);margin:6px 0 18px}
.flourish::before,.flourish::after{content:"";height:1px;flex:1;max-width:220px;background:linear-gradient(90deg,transparent,var(--line-gold),transparent)}
.flourish .gem{color:var(--gold);font-size:13px;letter-spacing:3px}

/* ---------- ấn triện (seal) ---------- */
.seal{
  flex:0 0 auto;width:38px;height:38px;border-radius:9px;display:grid;place-items:center;
  font-family:var(--han);font-size:24px;line-height:1;color:#fbe9c8;
  background:linear-gradient(160deg,#b0411f,#7e2c14);
  border:1px solid #d98a5f;box-shadow:inset 0 0 0 2px rgba(255,225,190,.18);
}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:14px;
  padding:11px 20px;
  background:linear-gradient(180deg,#241a0e,#140e07);
  border-bottom:1px solid var(--line-gold);
}
.topbar::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;background:linear-gradient(90deg,transparent,var(--gold),transparent);opacity:.5}
.topbar .logo{display:flex;align-items:center;gap:11px;min-width:0}
.topbar .logo .brandtext{min-width:0}
.topbar .logo b{font-family:var(--display);font-weight:700;color:var(--gold2);letter-spacing:.4px;font-size:18px;display:block;line-height:1.15;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .logo small{display:block;font-size:11px;color:var(--muted);font-weight:400;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar .spacer{flex:1}
.crumbs{color:var(--muted);font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
.crumbs a{color:var(--gold)}

/* ---------- buttons / chips ---------- */
.btn{background:#2c2113;border:1px solid var(--line2);color:var(--text);border-radius:var(--radius-sm);
  padding:8px 14px;cursor:pointer;font-size:14px;transition:.15s;font-family:var(--sans);max-width:100%}
.btn:hover{border-color:var(--gold);color:var(--gold2);background:#352815}
.btn:disabled{opacity:.35;cursor:default}
.btn.gold{background:linear-gradient(180deg,#3f2f12,#2e2210);border-color:var(--gold-soft);color:var(--gold2)}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:12px;padding:3px 10px;border-radius:999px;
  background:#241b10;border:1px solid var(--line2);color:var(--muted);max-width:100%;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:var(--sans)}
.chip.gold{border-color:var(--gold-soft);color:var(--gold2);background:#332710}
.chip.chu{border-color:#7e3a26;color:#e7a98e;background:#33180f}
.neo{display:inline-block;font-size:11px;padding:2px 8px;border-radius:6px;background:#241b10;border:1px solid var(--line2);
  color:var(--gold);font-variant-numeric:tabular-nums;font-family:var(--sans);max-width:100%}
.neo:hover{border-color:var(--gold);text-decoration:none;color:var(--gold2)}

/* ---------- demo banner ---------- */
.demo-banner{background:repeating-linear-gradient(45deg,#3a2c10,#3a2c10 12px,#332810 12px,#332810 24px);
  color:var(--gold2);text-align:center;padding:7px 14px;font-size:13px;border-bottom:1px solid var(--gold-soft);font-family:var(--sans)}
.demo-banner b{color:#fff}

/* ============ NHÀ TÀI TRỢ — ô ngang gọn (đầu & cuối trang) ============ */
.sponsor{max-width:var(--maxw);margin:14px auto 0;padding:0 16px}
.sponsor-inner{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  background:linear-gradient(110deg,#221a0d,#2c1f0f 55%,#231408);
  border:1px solid var(--line-gold);border-radius:var(--radius);padding:11px 16px;position:relative;overflow:hidden}
.sponsor-inner::before{content:"";position:absolute;inset:0;background:radial-gradient(420px 120px at 12% 0,rgba(231,205,132,.12),transparent 70%);pointer-events:none}
.sponsor .spseal{width:40px;height:40px;border-radius:9px;background:linear-gradient(160deg,#b0411f,#7e2c14);
  display:grid;place-items:center;font-family:var(--han);font-size:22px;color:#fbe9c8;border:1px solid #d98a5f;flex:0 0 auto}
.sponsor .sptext{min-width:0;flex:1 1 240px}
.sponsor .sptag{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--gold-soft);font-family:var(--sans)}
.sponsor .spname{font-family:var(--display);font-weight:700;color:var(--gold2);font-size:18px;line-height:1.2;overflow-wrap:anywhere}
.sponsor .spappeal{color:var(--gold3);font-size:14px;font-weight:600;overflow-wrap:anywhere}
.sponsor .spdesc{color:var(--muted);font-size:13px;overflow-wrap:anywhere}
.sponsor .spdesc b{color:var(--chu2)}
.sponsor .spcta{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;background:linear-gradient(180deg,#e7cd84,#c9a227);
  color:#2a1c06;font-weight:700;padding:9px 16px;border-radius:999px;font-family:var(--sans);font-size:14px;
  border:1px solid #f3e6bf;box-shadow:0 0 18px rgba(201,162,39,.25);white-space:nowrap;animation:pulseCta 2.4s ease-in-out infinite}
.sponsor .spcta:hover{text-decoration:none;filter:brightness(1.06)}
@keyframes pulseCta{0%,100%{box-shadow:0 0 12px rgba(201,162,39,.18)}50%{box-shadow:0 0 22px rgba(231,205,132,.45)}}
.sponsor.foot{margin:28px auto 0}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:22px 20px 36px}
.page-head{display:flex;align-items:baseline;gap:12px;margin:8px 0 6px;flex-wrap:wrap}
.page-head h1{font-family:var(--display);font-size:30px;margin:0;color:var(--gold2);font-weight:700;letter-spacing:.3px;line-height:1.15}
.page-head .sub{color:var(--muted);font-size:14px}
.section-title{font-family:var(--display);color:var(--gold2);font-size:21px;margin:0 0 12px;border-bottom:1px solid var(--line);padding-bottom:8px;font-weight:600}

/* ---------- bộ nav (7 mục) — XUỐNG DÒNG, không vuốt ngang ---------- */
.bo-nav{position:sticky;top:54px;z-index:30;display:flex;flex-wrap:wrap;gap:6px;justify-content:center;padding:9px 12px;
  background:linear-gradient(180deg,#1a130a,#140e07);border-bottom:1px solid var(--line)}
.bo-nav a{white-space:nowrap;padding:7px 14px;border-radius:var(--radius-sm);color:var(--muted);font-size:14px;font-weight:600;
  font-family:var(--sans);border:1px solid transparent;flex:0 0 auto}
.bo-nav a:hover{background:#2a2012;color:var(--gold2);text-decoration:none}
.bo-nav a.active{background:linear-gradient(180deg,#3a2c12,#2c2110);color:var(--gold2);box-shadow:inset 0 -2px 0 var(--gold)}

/* ---------- cards ---------- */
.cards{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(min(100%,290px),1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr))}
.card{background:linear-gradient(180deg,#1d160d,#181109);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 17px;transition:.16s;cursor:pointer;position:relative;overflow:hidden;min-width:0}
.card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--gold),transparent);opacity:0;transition:.16s}
.card:hover{border-color:var(--gold-soft);transform:translateY(-2px)}
.card:hover::before{opacity:.8}
.card h3{margin:0 0 4px;color:var(--gold2);font-family:var(--display);font-size:18px;font-weight:600;overflow-wrap:anywhere}
.card .cn{color:var(--muted2);font-size:13px;font-weight:400;font-family:var(--han)}
.card .blurb{color:var(--muted);font-size:13.5px;margin-top:8px;line-height:1.6;overflow-wrap:anywhere}
.card .meta-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;min-width:0}

/* ---------- toolbar (filters) ---------- */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px;min-width:0}
.toolbar input,.toolbar select{background:#140e07;border:1px solid var(--line2);color:var(--text);border-radius:var(--radius-sm);
  padding:9px 11px;font-size:14px;font-family:var(--sans);max-width:100%}
.toolbar input{min-width:0;flex:1 1 200px}
.toolbar input::placeholder{color:var(--muted2)}
.toolbar label{color:var(--muted);font-size:13px}
.count{color:var(--muted2);font-size:13px}

/* ---------- drawer ---------- */
.drawer-bg{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:50;display:none}
.drawer-bg.show{display:block}
.drawer{position:fixed;top:0;right:0;height:100%;width:min(560px,96vw);background:linear-gradient(180deg,#1a130a,#140e07);
  border-left:1px solid var(--line-gold);z-index:60;transform:translateX(100%);transition:.22s;display:flex;flex-direction:column}
.drawer.show{transform:translateX(0)}
.drawer header{display:flex;align-items:flex-start;gap:10px;padding:18px 20px;border-bottom:1px solid var(--line);min-width:0}
.drawer header h2{margin:0;font-family:var(--display);color:var(--gold2);font-size:23px;line-height:1.2;font-weight:700;overflow-wrap:anywhere;min-width:0}
.drawer header .cn{color:var(--muted2);font-size:14px;font-family:var(--han)}
.drawer .close{margin-left:auto;font-size:20px;background:none;border:none;color:var(--muted);cursor:pointer;flex:0 0 auto}
.drawer .close:hover{color:var(--gold2)}
.drawer .body{overflow:auto;padding:18px 20px 40px}
.kv{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;min-width:0}

/* ---------- tabs (nhân vật) ---------- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:4px 0 16px;overflow-x:auto}
.tabs button{background:none;border:none;color:var(--muted);padding:9px 13px;cursor:pointer;font-size:14px;font-weight:600;
  white-space:nowrap;font-family:var(--sans);border-bottom:2px solid transparent}
.tabs button.active{color:var(--gold2);border-bottom-color:var(--gold)}
.tab-pane{display:none}
.tab-pane.active{display:block}
.prose{color:#dccfb2;font-size:15px;line-height:1.85;overflow-wrap:anywhere}
.prose p{margin:0 0 1em}
/* Tiểu sử dạng khối (theo web cũ) */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}
.iblock{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:10px 13px;min-width:0}
.iblock.full{grid-column:1/-1}
.iblock .lbl{font-size:10.5px;letter-spacing:1px;text-transform:uppercase;color:var(--muted2);font-family:var(--sans);margin-bottom:4px}
.iblock .val{font-size:14.5px;color:var(--gold3);line-height:1.55;overflow-wrap:anywhere}
.ts-sum{background:#1c150d;border-left:3px solid var(--gold);border-radius:0 10px 10px 0;padding:12px 15px;color:#ddd0b6;font-size:14.5px;line-height:1.8}
@media(max-width:520px){.info-grid{grid-template-columns:1fr}}

/* ---------- kinh lịch timeline ---------- */
.timeline{border-left:2px solid var(--line2);margin-left:6px;padding-left:16px;display:flex;flex-direction:column;gap:14px}
.ev{position:relative;min-width:0}
.ev::before{content:"";position:absolute;left:-23px;top:5px;width:10px;height:10px;border-radius:50%;background:var(--normal)}
.ev.major::before{background:var(--major);box-shadow:0 0 0 3px #3a2c10}
.ev.minor::before{background:var(--minor)}
.ev.bridge::before{background:transparent;border:2px solid var(--line2);width:8px;height:8px;top:6px}
.ev .ev-bridge{color:var(--muted);font-size:13.5px;font-style:italic;line-height:1.65;overflow-wrap:anywhere}
.ev .ev-bridge .rng{font-style:normal;color:var(--muted2)}
.ev .ev-head{display:flex;align-items:center;gap:8px;margin-bottom:3px;flex-wrap:wrap;min-width:0}
.ev .ev-text{color:#d6c9ac;font-size:14.5px;line-height:1.7;overflow-wrap:anywhere}
.lvl{font-size:11px;padding:1px 8px;border-radius:6px;font-family:var(--sans);white-space:nowrap}
.lvl.major{background:#3a2c10;color:var(--major)}
.lvl.normal{background:#22303c;color:var(--normal)}
.lvl.minor{background:#222a1c;color:var(--minor)}
/* tag quan hệ (nhân mạch) */
.rtag{font-size:11px;padding:1px 9px;border-radius:999px;font-family:var(--sans);white-space:nowrap;border:1px solid transparent}
.rtag.cha-me{background:#1f2e22;color:#7fc99a;border-color:#2f5a40}
.rtag.the-thiep{background:#33182a;color:#e79ac0;border-color:#7e3a66}
.rtag.ho-hang{background:#2a2114;color:#cbb789;border-color:#5a4a28}
.rtag.ban-be{background:#22303c;color:#7fa6c4;border-color:#365066}
.rtag.dong-minh{background:#1f2e22;color:#9ad0a8;border-color:#356040}
.rtag.an-nhan{background:#33280f;color:#e6c878;border-color:#6b521f}
.rtag.su-mon{background:#2a2440;color:#b3a6e0;border-color:#4a3c7a}
.rtag.doi-thu{background:#33180f;color:#e7a98e;border-color:#7e3a26}
.rtag.khac{background:#241b10;color:#a8966f;border-color:#3a2f1c}

/* ---------- realm ladder ---------- */
.ladder{display:flex;flex-direction:column;gap:0}
.rung{display:flex;gap:14px;align-items:stretch;cursor:pointer;min-width:0}
.rung .rail{display:flex;flex-direction:column;align-items:center;flex:0 0 auto}
.rung .dot{width:14px;height:14px;border-radius:50%;background:var(--gold);margin-top:18px;flex:0 0 auto;box-shadow:0 0 0 4px #241b10,0 0 10px rgba(201,162,39,.4)}
.rung .line{width:2px;flex:1;background:linear-gradient(180deg,var(--line2),var(--line))}
.rung:last-child .line{display:none}
.rung .rcard{flex:1;min-width:0;background:linear-gradient(180deg,#1d160d,#181109);border:1px solid var(--line);border-radius:11px;padding:12px 15px;margin-bottom:12px;transition:.15s}
.rung:hover .rcard{border-color:var(--gold-soft)}
.rung .rcard h3{margin:0;color:var(--gold2);font-family:var(--display);font-size:17px;font-weight:600;overflow-wrap:anywhere}
.rung .rcard .lvlno{color:var(--gold-soft);font-size:12px;font-weight:700;margin-right:6px;font-family:var(--sans)}

/* ---------- map tree ---------- */
.tree{font-size:14.5px}
.tree ul{list-style:none;margin:0;padding-left:18px;border-left:1px dashed var(--line2)}
.tree>ul{border-left:none;padding-left:0}
.tree li{margin:2px 0;min-width:0}
.tree .node{display:inline-flex;align-items:center;gap:8px;padding:5px 9px;border-radius:8px;cursor:pointer;max-width:100%}
.tree .node:hover{background:#2a2012}
.tree .node.sel{background:#33280f;color:var(--gold2)}
.tree .tw{width:14px;display:inline-block;color:var(--muted2);cursor:pointer;user-select:none;flex:0 0 auto}
.tree .cap{font-size:10.5px;color:var(--muted2);border:1px solid var(--line2);border-radius:5px;padding:0 5px;font-family:var(--sans);flex:0 0 auto}

/* ---------- reader ---------- */
.reader-wrap{display:flex;gap:0;height:calc(100vh - 116px);border:1px solid var(--line-gold);border-radius:14px;overflow:hidden;min-width:0}
.reader-toc{width:300px;flex:0 0 300px;background:#171109;border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}
.reader-toc .s{padding:10px}
.reader-toc .s input{width:100%;padding:8px 10px;border-radius:8px;border:1px solid var(--line2);background:#120c06;color:var(--text);font-family:var(--sans)}
.reader-toc .list{flex:1;overflow:auto;padding:2px 6px 14px}
.reader-toc .item{padding:7px 9px;border-radius:7px;cursor:pointer;font-size:13.5px;color:#cdbfa0;display:flex;gap:7px;min-width:0}
.reader-toc .item:hover{background:#2a2012}
.reader-toc .item.active{background:#33280f;color:var(--gold2);box-shadow:inset 3px 0 0 var(--gold)}
.reader-toc .item .n{color:var(--gold);font-size:11.5px;min-width:40px;font-variant-numeric:tabular-nums;flex:0 0 auto;font-family:var(--sans)}
.reader-toc .item span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.reader-main{flex:1;overflow:auto;display:flex;justify-content:center;min-width:0}
.reader-main .inner{max-width:720px;width:100%;padding:26px 26px 90px}
.paper{background:linear-gradient(180deg,#f4ead2,#efe1c2);color:var(--paper-ink);border-radius:12px;padding:38px 40px 50px;
  box-shadow:0 12px 40px rgba(0,0,0,.45);border:1px solid #cdb682}
.paper .cnum{color:#9a7320;font-size:12.5px;letter-spacing:1.5px;text-transform:uppercase;font-family:var(--sans)}
.paper h1{font-family:var(--display);font-size:25px;margin:5px 0 6px;color:#241a0c;line-height:1.25;font-weight:700;overflow-wrap:anywhere}
.paper .cmeta{color:#94804f;font-size:12px;border-bottom:1px solid var(--paper-line);padding-bottom:12px;margin-bottom:18px;font-family:var(--sans)}
.paper .cbody{font-size:18px;line-height:2;white-space:pre-wrap;overflow-wrap:anywhere}
.paper .cbody p{margin:0 0 1.05em}
.pager{display:flex;gap:10px;margin-top:24px}
.pager .btn{flex:1;text-align:center;padding:12px}

/* ---------- misc ---------- */
.empty{color:var(--muted2);text-align:center;padding:50px 16px}
.loading{color:var(--muted);text-align:center;padding:40px}

/* ============ FOOTER: trợ duyên + góp ý ============ */
.site-foot{max-width:var(--maxw);margin:8px auto 0;padding:0 16px 40px}
.foot-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));margin-top:18px}
.foot-card{background:linear-gradient(180deg,#1c150d,#161009);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;min-width:0}
.foot-card h3{margin:0 0 4px;font-family:var(--display);color:var(--gold2);font-size:19px;font-weight:700;display:flex;align-items:center;gap:9px}
.foot-card .lead{color:var(--muted);font-size:13.5px;margin:0 0 14px;overflow-wrap:anywhere}
/* donate */
.donate-row{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.qr{width:124px;height:124px;flex:0 0 auto;border-radius:11px;background:#f4ead2;display:grid;place-items:center;color:#6b521f;
  border:1px solid #cdb682;font-size:12px;text-align:center;font-family:var(--sans);padding:8px}
.donate-info{min-width:0;flex:1 1 180px;font-size:14px}
.donate-info .di{display:flex;justify-content:space-between;gap:10px;padding:4px 0;border-bottom:1px dashed var(--line2)}
.donate-info .di b{color:var(--gold2);font-family:var(--sans);text-align:right;overflow-wrap:anywhere}
.donate-info .di span{color:var(--muted)}
/* feedback */
.fb-form{display:flex;flex-direction:column;gap:10px}
.fb-form textarea{width:100%;min-height:96px;resize:vertical;background:#120c06;border:1px solid var(--line2);color:var(--text);
  border-radius:10px;padding:11px 13px;font-family:var(--serif);font-size:14.5px;line-height:1.6}
.fb-form .fb-row{display:flex;gap:10px;flex-wrap:wrap}
.fb-form input{flex:1 1 180px;min-width:0;background:#120c06;border:1px solid var(--line2);color:var(--text);border-radius:10px;padding:10px 12px;font-family:var(--sans);font-size:14px}
.fb-form .send{align-self:flex-start;background:linear-gradient(180deg,#e7cd84,#c9a227);color:#2a1c06;font-weight:700;border:1px solid #f3e6bf;
  border-radius:999px;padding:9px 20px;cursor:pointer;font-family:var(--sans);font-size:14px}
.fb-form .send:hover{filter:brightness(1.06)}
.fb-note{color:var(--jade);font-size:13px;display:none}
.fb-note.show{display:block}

.copyline{color:var(--muted2);font-size:12.5px;text-align:center;padding:22px 12px 0;margin-top:22px;border-top:1px solid var(--line);font-family:var(--sans)}

/* ============ BONG BÓNG NỔI Zalo + TikTok (cạnh phải) ============ */
.bubbles{position:fixed;right:16px;bottom:20px;z-index:70;display:flex;flex-direction:column;gap:12px}
.bubbles a{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;
  font-family:var(--sans);font-size:13px;border:2px solid rgba(255,255,255,.25);box-shadow:0 6px 18px rgba(0,0,0,.45);
  transition:.15s;position:relative}
.bubbles a:hover{transform:scale(1.08);text-decoration:none}
.bubbles a .lbl{position:absolute;right:60px;white-space:nowrap;background:#1c150d;border:1px solid var(--line-gold);color:var(--gold2);
  font-size:12.5px;padding:5px 10px;border-radius:8px;opacity:0;pointer-events:none;transition:.15s}
.bubbles a:hover .lbl{opacity:1}
.bubbles a.zalo{background:linear-gradient(160deg,#0190f3,#0068ff)}
.bubbles a.tiktok{background:linear-gradient(160deg,#2a2a2a,#000)}
.bubbles a svg{width:24px;height:24px}
.bubbles a::after{content:"";position:absolute;inset:-2px;border-radius:50%;border:2px solid currentColor;opacity:.0;animation:ring 2.6s ease-out infinite}
.bubbles a.zalo::after{color:#3aa9ff}
.bubbles a.tiktok::after{color:#ff3b5c}
@keyframes ring{0%{opacity:.5;transform:scale(1)}70%{opacity:0;transform:scale(1.5)}100%{opacity:0}}

/* ---------- responsive ---------- */
@media (max-width:820px){
  .reader-wrap{flex-direction:column;height:auto}
  .reader-toc{width:auto;flex:none;max-height:42vh}
  .paper{padding:24px 18px 36px}
  .drawer{width:100vw}
  .page-head h1{font-size:25px}
  .sponsor .spcta{flex-basis:100%;justify-content:center}
  .crumbs{display:none}
}
@media (max-width:400px){
  .wrap{padding:16px 12px 28px}
  .bubbles a{width:46px;height:46px}
  .topbar .logo b{font-size:16px}
}