:root{--brand:#0f766e;--brand-d:#115e59;--ink:#1f2933;--muted:#64748b;--bg:#f4f6f8;--card:#fff;--line:#e2e8f0;--red:#b91c1c}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);font-size:15px}
a{color:var(--brand-d)}
.protect{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.protect input,.protect textarea{-webkit-user-select:text;user-select:text}
canvas,img{-webkit-user-drag:none}
header.top{background:var(--brand);color:#fff}
.bar{max-width:1200px;margin:auto;display:flex;align-items:center;gap:16px;padding:12px 16px}
.logo{font-weight:700;font-size:21px;letter-spacing:.5px;color:#fff;text-decoration:none;white-space:nowrap}
.logo span{color:#99f6e4}
.toplinks{display:flex;gap:14px;font-size:14px;font-weight:500;margin-left:auto;align-items:center}
.toplinks a{color:#fff;text-decoration:none;cursor:pointer}
.pill{background:rgba(255,255,255,.16);padding:5px 11px;border-radius:20px;font-size:13px}
.container{max-width:1200px;margin:20px auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px}
.pad{padding:20px}
h1{font-size:24px;margin:0 0 14px}
h2{font-size:18px;margin:0 0 12px}
.muted{color:var(--muted)}
.small{font-size:13px}
.btn{border:1px solid var(--line);background:#fff;border-radius:6px;padding:7px 12px;font:inherit;font-size:13.5px;cursor:pointer;color:var(--ink);text-decoration:none;display:inline-block}
.btn:hover{border-color:var(--brand);color:var(--brand)}
.btn.pri{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn.pri:hover{background:var(--brand-d);color:#fff}
.btn.danger{color:var(--red)}
.btn.danger:hover{border-color:var(--red)}
.btn:disabled{opacity:.45;cursor:default}
input,textarea,select{font:inherit;font-size:14px;padding:9px 10px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);width:100%}
textarea{min-height:90px;resize:vertical}
label{display:block;font-size:13px;font-weight:600;margin:10px 0 4px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.err{color:var(--red);font-size:13.5px;min-height:20px;margin-top:8px}
.ok{color:var(--brand-d);font-size:13.5px;margin-top:8px}
/* login */
.auth{max-width:420px;margin:60px auto;padding:0 16px}
.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:12px}
.tabs button{flex:1;background:none;border:0;padding:12px;font:inherit;font-weight:600;cursor:pointer;color:var(--muted);border-bottom:2px solid transparent}
.tabs button.on{color:var(--brand);border-color:var(--brand)}
/* thư viện */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}
.bookcard{padding:16px;display:flex;gap:14px}
.cover{flex:none;width:70px;height:96px;border-radius:5px;color:#fff;font-size:10.5px;line-height:1.25;display:flex;align-items:flex-end;padding:6px;font-weight:700;background:var(--brand)}
.bookcard h3{margin:0 0 4px;font-size:15.5px}
.chlist{list-style:none;padding:0;margin:8px 0 0;font-size:13.5px}
.chlist li{padding:3px 0}
.chlist a{text-decoration:none}
.chlist a:hover{text-decoration:underline}
/* trang đọc */
.reader-wrap{max-width:1200px;margin:16px auto;padding:0 16px;display:grid;grid-template-columns:270px 1fr;gap:16px}
.side{padding:14px;position:sticky;top:12px;max-height:calc(100vh - 24px);overflow:auto}
.lbl{font-size:11.5px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);font-weight:600;margin:4px 0 6px}
.chap{list-style:none;padding:0;margin:0}
.chap li a{display:block;padding:8px 10px;border-radius:6px;font-size:13.5px;text-decoration:none;color:var(--ink)}
.chap li a:hover{background:#f1f5f9}
.chap li.on a{background:#ccfbf1;color:var(--brand-d);font-weight:600}
.main{padding:20px 24px;position:relative;overflow:hidden}
.crumb{font-size:12.5px;color:var(--muted)}
.title{font-family:'Noto Serif',Georgia,serif;font-size:24px;margin:6px 0 12px;line-height:1.3}
.toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:14px;position:sticky;top:0;background:var(--card);padding:8px 0;z-index:9}
#pages{margin:0 auto;position:relative}
.page{position:relative;margin:0 auto 14px;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.12);border-radius:2px}
.page canvas{display:block;width:100%;height:auto}
.page .num{position:absolute;right:8px;top:6px;font-size:11px;color:#94a3b8}
.page .loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:13px}
.ov{position:absolute;inset:0;pointer-events:none;z-index:3}
body.hidden #pages .page canvas{filter:blur(18px);opacity:.3}
#hiddenNote{display:none;position:fixed;top:40%;left:50%;transform:translate(-50%,-50%);z-index:40;background:#0f172a;color:#fff;padding:14px 20px;border-radius:8px;font-size:14px;text-align:center;cursor:pointer}
body.hidden #hiddenNote{display:block}
.pager{display:flex;justify-content:space-between;gap:10px;margin-top:10px;padding-top:14px;border-top:1px solid var(--line)}
.wm-float{position:absolute;top:160px;left:40px;z-index:6;pointer-events:none;font-size:12px;color:rgba(185,28,28,.28);font-weight:600;white-space:nowrap;transition:top 3s ease,left 3s ease}
#shield{position:fixed;inset:0;z-index:50;background:#0f172a;color:#fff;display:none;align-items:center;justify-content:center;text-align:center;padding:20px}
#shield.on{display:flex}
#shield h2{margin:0 0 8px}
#shield p{color:#cbd5e1;margin:0}
#toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,140px);background:var(--red);color:#fff;padding:10px 18px;border-radius:8px;font-size:14px;z-index:60;transition:transform .25s;box-shadow:0 6px 20px rgba(0,0,0,.2);max-width:90vw;text-align:center}
#toast.on{transform:translate(-50%,0)}
#toast.good{background:var(--brand)}
.modal{position:fixed;inset:0;z-index:70;background:rgba(15,23,42,.55);display:none;align-items:center;justify-content:center}
.modal.on{display:flex}
.modal .box{background:#fff;border-radius:12px;padding:22px;width:min(460px,92vw)}
body.sepia .main,body.sepia .page{background:#fbf5e6}
body.dark{--card:#1e2530;--line:#334155;--ink:#e2e8f0;--bg:#111827;--muted:#94a3b8}
body.dark .page canvas{filter:invert(.88) hue-rotate(180deg)}
body.dark .chap li a:hover{background:#273142}
body.dark .chap li.on a{background:#134e4a;color:#99f6e4}
body.dark .btn,body.dark input,body.dark textarea,body.dark select{background:#1e2530;color:var(--ink)}
/* quản trị */
.adm-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.adm-tabs button{border:1px solid var(--line);background:#fff;border-radius:20px;padding:7px 14px;font:inherit;font-size:13.5px;cursor:pointer}
.adm-tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.badge{display:inline-block;min-width:20px;padding:1px 7px;border-radius:10px;background:var(--red);color:#fff;font-size:11.5px;text-align:center;margin-left:4px}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:12px;text-transform:uppercase;color:var(--muted);letter-spacing:.4px}
.st{font-size:12px;padding:2px 8px;border-radius:10px;font-weight:600}
.st.pending{background:#fef3c7;color:#92400e}.st.active,.st.ready,.st.done{background:#ccfbf1;color:#115e59}
.st.blocked,.st.error,.st.open{background:#fee2e2;color:#991b1b}.st.processing{background:#e0e7ff;color:#3730a3}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;margin-bottom:16px}
.stat{padding:14px}.stat b{display:block;font-size:26px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips label{display:flex;align-items:center;gap:5px;font-weight:400;margin:0;border:1px solid var(--line);border-radius:14px;padding:3px 9px;font-size:12.5px;cursor:pointer}
.chips input{width:auto}
.drop{border:2px dashed var(--line);border-radius:10px;padding:18px;text-align:center;color:var(--muted);cursor:pointer}
.drop.over{border-color:var(--brand);background:#f0fdfa}
@media print{html,body{display:none!important}}
@media (max-width:860px){.reader-wrap{grid-template-columns:1fr}.side{position:static;max-height:none}.main{padding:14px}.title{font-size:20px}.hide-m{display:none!important}table{font-size:12.5px}}
/* ---------- thanh trên trang đọc ---------- */
:root{--tool:#3b9ae1;--tool-d:#2a85cc}
body.reading{background:#eef1f4}
.rbar{position:sticky;top:0;z-index:30;background:#fff;box-shadow:0 2px 6px rgba(15,23,42,.10);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;padding:8px 18px}
.rlogo{font-weight:700;font-size:26px;letter-spacing:4px;color:var(--brand);text-decoration:none;white-space:nowrap}
.rlogo span{color:#e8613c}
.rtitle{font-weight:700;font-size:15.5px;text-transform:uppercase;text-align:center;letter-spacing:.3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:42vw}
.rtools{justify-self:end;display:flex;background:var(--tool);border-radius:8px;padding:3px}
.rtools button{background:none;border:0;color:#fff;font:inherit;font-size:12px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;padding:5px 12px;border-radius:6px;min-width:64px}
.rtools button:hover,.rtools button.on{background:var(--tool-d)}
.rtools svg{width:21px;height:21px;fill:#fff}
.rwrap{max-width:980px;margin:16px auto;padding:0 16px}
.rhead{display:flex;justify-content:space-between;align-items:flex-end;gap:10px;margin-bottom:14px}
.rhead .title{margin:4px 0 0}
.dim{position:fixed;left:0;right:0;bottom:0;top:var(--barh,62px);background:rgba(15,23,42,.35);z-index:40;display:none}
.dim.on{display:block}
.drawer{position:fixed;top:var(--barh,62px);bottom:0;left:0;width:min(360px,88vw);background:var(--card);z-index:41;transform:translateX(-105%);transition:transform .22s;display:flex;flex-direction:column;box-shadow:4px 0 18px rgba(0,0,0,.15)}
.drawer.on{transform:none}
.dhead{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line);font-size:15px}
.dclose{border:0;background:none;font-size:18px;cursor:pointer;color:var(--muted)}
.dbody{overflow:auto;padding:8px 10px;flex:1}
.dlist{list-style:none;margin:0;padding:0}
.dlist a{display:block;padding:9px 10px;border-radius:6px;text-decoration:none;color:var(--ink);font-size:14px;cursor:pointer}
.dlist a:hover{background:#f1f5f9}
.dlist li.on>a{background:#e0effc;color:#1d6fb0;font-weight:600}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:6px}
.pgrid a{border:1px solid var(--line);border-radius:6px;padding:12px 0;text-align:center;font-size:13px;cursor:pointer;text-decoration:none;color:var(--ink)}
.pgrid a:hover{border-color:var(--tool)}
.pgrid a.on{background:var(--tool);color:#fff;border-color:var(--tool)}
.sbox{display:flex;gap:6px;padding:6px 6px 10px}
.hit{display:block;padding:9px 10px;border-radius:6px;cursor:pointer;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line)}
.hit:hover{background:#f1f5f9}
.hit b{display:block;font-size:12.5px;color:#1d6fb0;margin-bottom:2px}
.hit span{font-size:13px;color:var(--muted)}
.hit mark{background:#fde68a;color:inherit;padding:0 1px}
.spop{position:fixed;z-index:42;top:calc(var(--barh,62px) + 6px);right:16px;width:290px;background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.15);padding:12px}
.srow{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:6px 2px;font-size:14px}
.srow .row{gap:4px}
.srow .btn{padding:5px 9px}
#themes .btn.on{background:var(--tool);color:#fff;border-color:var(--tool)}
.sline{height:1px;background:var(--line);margin:8px 0}
.slink{display:block;width:100%;text-align:left;border:0;background:none;font:inherit;font-size:14px;padding:8px 4px;cursor:pointer;color:var(--ink);border-radius:6px}
.slink:hover{background:#f1f5f9}
.slink.danger{color:var(--red)}
.page.flash{box-shadow:0 0 0 3px var(--tool)}
body.dark .rbar{background:#1e2530}
body.dark .dlist a:hover,body.dark .hit:hover,body.dark .slink:hover{background:#273142}
@media (max-width:860px){
  .rbar{grid-template-columns:auto 1fr;padding:6px 10px}
  .rtitle{display:none}
  .rlogo{font-size:20px;letter-spacing:2px}
  .rtools button{min-width:0;padding:5px 7px;font-size:10.5px}
  .rtools svg{width:19px;height:19px}
  .spop{right:8px}
}
@media (max-width:420px){.rtools button span{display:none}.rtools button{padding:7px 9px}}
/* ---------- trang đã lưu ---------- */
.fhead{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 8px 4px;font-size:14px;border-top:1px solid var(--line);margin-top:6px}
.fhead:first-child{border-top:0;margin-top:0}
.fbtn{border:0;background:none;font:inherit;font-size:12px;color:var(--muted);cursor:pointer;padding:3px 6px;border-radius:5px}
.fbtn:hover{background:#f1f5f9;color:var(--ink)}
.fbtn.danger:hover{color:var(--red)}
.fitem{display:flex;align-items:center;gap:4px}
.fitem a{flex:1;display:block;padding:7px 10px;border-radius:6px;cursor:pointer}
.fitem a:hover{background:#f1f5f9}
.fitem a b{display:block;font-size:13px;color:#1d6fb0;font-weight:600}
.fitem a span{font-size:12px;color:var(--muted)}
#savePop .slink{padding:7px 6px}
#saveFolders{max-height:220px;overflow:auto}
.saved-sec{margin-top:26px}
.saved-sec .card{padding:6px 12px 12px}
@media (max-width:860px){.rtools button{padding:5px 6px}}
.rtools button{white-space:nowrap}
@media (max-width:1100px){.rtitle{max-width:26vw}}
@media (max-width:420px){.rtools button{padding:7px 7px}.rlogo{font-size:17px;letter-spacing:1px}}
.fhead.sub{border-top:0;margin-top:0;padding-top:6px}
.frow{display:flex;align-items:center;gap:2px}
.frow .slink{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.frow .fbtn{white-space:nowrap}
#saveFolders{max-height:260px}
.umenu{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 10px 26px rgba(0,0,0,.18);min-width:170px;z-index:30;padding:5px;text-align:left}
.umenu a{display:block;padding:9px 12px;border-radius:6px;color:var(--ink)!important;font-weight:500;font-size:14px;white-space:nowrap}
.umenu a:hover{background:#f1f5f9}
.infot{width:100%;border-collapse:collapse;margin-top:10px}
.infot td{padding:10px 8px;border-bottom:1px solid var(--line);font-size:15px}
.infot td:first-child{color:var(--muted);width:42%}
.infot tr:last-child td{border-bottom:0}
.bkrow{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid var(--line)}
.bkrow:last-child{border-bottom:0}
.switch{position:relative;display:inline-block;width:50px;height:28px;flex:none;margin:0}
.switch input{opacity:0;width:0;height:0;position:absolute}
.slider{position:absolute;inset:0;background:#cbd5e1;border-radius:28px;cursor:pointer;transition:background .15s}
.slider:before{content:"";position:absolute;width:22px;height:22px;left:3px;top:3px;background:#fff;border-radius:50%;transition:transform .15s;box-shadow:0 1px 3px rgba(0,0,0,.25)}
.switch input:checked + .slider{background:var(--brand)}
.switch input:checked + .slider:before{transform:translateX(22px)}
.swlabel{width:118px;font-size:13.5px;font-weight:600}
@media (max-width:560px){.swlabel{display:none}}
.chrows{background:#f8fafc;border-bottom:1px solid var(--line);padding:4px 18px 8px 76px}
.chrow{display:flex;align-items:center;gap:14px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.chrow:last-child{border-bottom:0}
.switch.sm{width:40px;height:22px}
.switch.sm .slider:before{width:16px;height:16px}
.switch.sm input:checked + .slider:before{transform:translateX(18px)}
.switch input:disabled + .slider{opacity:.45;cursor:not-allowed}
.bkrow .fbtn{padding-left:0}
@media (max-width:560px){.chrows{padding-left:18px}}
/* ---------- trang giới thiệu, phân loại, tin mới ---------- */
.hero{background:linear-gradient(135deg,#0f766e,#134e4a);color:#fff;padding:46px 16px 50px}
.hero h1{font-size:30px;margin:0 0 10px}
.hero p{max-width:640px;line-height:1.6;color:#ccfbf1;margin:0 0 18px;font-size:16px}
.hero .btn.pri{background:#f59e0b;border-color:#f59e0b;color:#1f2933;font-weight:600}
.catchip{border:1px solid var(--line);background:#fff;border-radius:16px;padding:5px 13px;font:inherit;font-size:13px;cursor:pointer;color:var(--ink)}
.catchip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.pricegrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}
.pricecard{padding:16px;text-align:center}.pricecard b{display:block;font-size:22px;margin-top:4px;color:var(--brand-d)}
.newsrow{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px;align-items:baseline}
.newsrow:last-child{border-bottom:0}
.newsrow a{text-decoration:none;font-weight:500}
.newsrow span.small{white-space:nowrap}
@media (max-width:560px){.newsrow{flex-direction:column;gap:2px}.hero h1{font-size:24px}}
/* ---------- tô sáng, ghi chú, video ---------- */
.hl{position:absolute;background:rgba(250,204,21,.38);mix-blend-mode:multiply;border-radius:2px;cursor:pointer;z-index:2}
.hl:hover{background:rgba(250,204,21,.55)}
.hl.has::after{content:"✎";position:absolute;right:-9px;top:-9px;width:18px;height:18px;border-radius:50%;background:#f59e0b;color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;mix-blend-mode:normal}
.hl.draft{background:rgba(250,204,21,.3);outline:1px dashed #b45309;pointer-events:none}
body.dark .hl{mix-blend-mode:screen;background:rgba(250,204,21,.3)}
body.hlmode #pages .page{cursor:crosshair;touch-action:none}
body.hlmode .hl{pointer-events:none}
#hlBar{position:fixed;z-index:41;left:50%;bottom:18px;transform:translateX(-50%);background:#1f2933;color:#fff;border-radius:24px;padding:8px 10px 8px 16px;display:flex;gap:12px;align-items:center;font-size:13.5px;box-shadow:0 6px 20px rgba(0,0,0,.3);max-width:calc(100vw - 16px)}
#hlBar[hidden]{display:none}
#notePop{width:300px;max-width:calc(100vw - 16px)}
.mediabox{margin:0 auto 16px;max-width:900px}
.mediabox video{display:block;width:100%;max-height:70vh;background:#000;border-radius:6px}
.mediabox audio{display:block;width:100%}
.ytwrap{position:relative;aspect-ratio:16/9;background:#000;border-radius:6px;overflow:hidden}
.ytwrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@media (max-width:860px){.rtools button{padding:5px 5px;font-size:10px}}
@media (max-width:420px){.rtools button{padding:7px 6px}.rtools svg{width:18px;height:18px}}
.gsep{display:flex;align-items:center;gap:10px;color:var(--muted,#64748b);font-size:12.5px;margin:14px 0 4px}
.gsep::before,.gsep::after{content:"";flex:1;height:1px;background:var(--line)}
.gsep[hidden]{display:none}