:root{--blue:#174e73;--deep:#0e3855;--orange:#e88a18;--ink:#20313d;--muted:#667784;--paper:#fff;--wash:#edf5f8;--line:#d8e4e9;--ok:#25734b;--danger:#a84032;--shadow:0 16px 42px rgba(25,65,87,.12);--green:var(--blue);--jade:var(--blue);--gold:var(--orange);--soft:var(--wash);--warn:#fff7ea}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:128px}body{margin:0;background:linear-gradient(180deg,#e9f3f7,#fbfcfd 34rem,#fff);color:var(--ink);font:16px/1.5 "Lora",serif}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}a{color:inherit}.site-head,.shell,.site-footer{width:min(1080px,100%);margin:auto;padding-left:15px;padding-right:15px}.site-head{padding-top:10px}.brand{text-align:center;padding:0 0 14px}.brand img{width:96px;height:96px;border-radius:50%;object-fit:cover;background:#fff;box-shadow:var(--shadow)}.brand p{margin:8px 0 3px;color:var(--blue);font-size:.78rem;font-weight:800;letter-spacing:.05em}.brand h1{margin:0;color:var(--deep);font-size:clamp(1.15rem,4.3vw,1.85rem);line-height:1.18}.app-switch{display:flex;gap:7px;justify-content:center;overflow:auto;padding:3px 0 14px}.app-switch button{white-space:nowrap;border:1px solid var(--line);border-radius:999px;background:#fff;padding:9px 13px;color:var(--blue);font-weight:750}.app-switch button.active{background:var(--blue);color:#fff;border-color:var(--blue)}.shell{padding-bottom:55px}.offline-note,.account-card,.panel{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.offline-note{display:flex;gap:10px;align-items:center;padding:11px 15px;margin-bottom:12px;background:#fff7ea;border-color:#f1d2a9}.offline-note b{color:#7d5515;white-space:nowrap}.offline-note span{font-size:.86rem;color:#6d5c38}.account-card{padding:13px 16px;margin-bottom:15px;display:flex;justify-content:space-between;align-items:center;gap:12px}.account-card b{color:var(--blue)}.account-card p{margin:2px 0;color:var(--muted);font-size:.88rem}.hero{padding:18px;border-radius:20px;background:linear-gradient(135deg,var(--blue),var(--deep));color:#fff;box-shadow:var(--shadow);margin-bottom:13px;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:220px;height:220px;border:1px solid rgba(255,255,255,.12);border-radius:50%;right:-80px;top:-105px;box-shadow:0 0 0 34px rgba(255,255,255,.035),0 0 0 70px rgba(255,255,255,.025)}.hero>*{position:relative;z-index:1}.hero h1,.hero h2{margin:6px 0;font-size:clamp(1.18rem,4.2vw,1.55rem);line-height:1.18}.hero p{margin:0;color:#e9f3f7;font-size:.88rem}.eyebrow{display:inline-block;font-size:.72rem;letter-spacing:.05em;font-weight:800;text-transform:uppercase;color:var(--orange)}.hero .eyebrow{color:#ffd59d}.four-grid,.card-grid{display:grid;gap:14px}.four-grid{grid-template-columns:repeat(2,1fr)}.four-grid>.door:last-child:nth-child(odd){grid-column:1/-1}.door,.content-card{position:relative;text-align:left;border:1.5px solid var(--line);border-radius:18px;background:#fff;padding:20px;box-shadow:0 7px 20px rgba(23,78,115,.06)}.door:hover,.content-card:hover{border-color:var(--blue);transform:translateY(-1px)}.door h3{margin:0 0 4px}.door h3,.content-card h3{color:var(--blue);font-size:1.12rem}.content-card h3{margin:8px 0 4px}.door p,.content-card p{margin:0;color:var(--muted);font-size:.9rem}.badge{display:inline-flex;margin-top:10px;padding:4px 8px;border-radius:999px;background:var(--wash);color:var(--blue);font-size:.74rem;font-weight:800}.badge.paid{background:#fff0dc;color:#8a5a12}.toolbar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-bottom:14px}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:0;border-radius:12px;padding:11px 16px;min-height:46px;font-weight:800}.primary{background:var(--orange);color:#fff}.secondary{background:#e9f0f3;color:var(--blue)}.outline{background:#fff;color:var(--blue);border:1px solid var(--line)}.danger{background:#fae9e6;color:var(--danger)}.panel{padding:20px}.section-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:15px}.section-head h2{margin:0;color:var(--blue);font-size:1.35rem}.section-head p{margin:4px 0;color:var(--muted)}.filter-row{display:flex;gap:7px;overflow-x:auto;padding:2px 1px 9px;scrollbar-width:thin}.chip{white-space:nowrap;border:1px solid var(--line);background:#fff;color:var(--blue);border-radius:999px;padding:9px 13px;font-weight:700}.chip.active{background:var(--blue);color:#fff}.content-card{box-shadow:none}.content-card .meta,.meta{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}.meta span{font-size:.74rem;font-weight:700;border-radius:999px;padding:5px 8px;background:var(--wash);color:var(--blue)}.locked{opacity:.78}.locked:after{content:"Trả phí";position:absolute;right:13px;top:13px;background:#fff0dc;color:#79500f;padding:4px 8px;border-radius:999px;font-size:.68rem;font-weight:800}.progress{height:9px;background:#e5eeeb;border-radius:99px;overflow:hidden;margin:12px 0}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--orange));border-radius:inherit}.lesson-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.7fr);gap:14px}.video-box{aspect-ratio:16/9;border-radius:17px;background:linear-gradient(135deg,var(--blue),var(--deep));color:#fff;display:grid;place-items:center;text-align:center;padding:22px}.play-ring{width:72px;height:72px;border:2px solid #ffd59d;border-radius:50%;display:grid;place-items:center;margin:auto;font-size:1.5rem}.video-box small{display:block;margin-top:12px;color:#dbeaf0}.status-list{display:grid;gap:9px}.status-row{border:1px solid var(--line);border-radius:12px;padding:11px 12px}.status-row b{display:block;color:var(--deep)}.status-row small{color:var(--muted)}.warning{padding:12px 14px;border-radius:12px;background:#fff7ea;color:#71551e;margin:12px 0}.form-grid{display:grid;gap:12px}.field label{display:block;font-weight:700;margin-bottom:5px}.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:11px;background:#fff}.field textarea{min-height:90px;resize:vertical}.split{display:grid;grid-template-columns:1fr 1fr;gap:12px}.empty{text-align:center;padding:35px 15px;color:var(--muted)}
.library-wrap{display:grid;gap:12px}.library-tabs{position:sticky;top:0;z-index:20;background:rgba(233,243,247,.96);backdrop-filter:blur(9px);border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:0 8px 25px rgba(23,78,115,.08)}.library-grid{display:grid;grid-template-columns:310px minmax(0,1fr);gap:12px;align-items:start}.library-side{padding:10px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 9px 28px rgba(23,78,115,.07)}.side-part-label{padding:12px 11px 5px;color:var(--orange);font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em}.side-item{width:100%;border:0;border-bottom:1px solid #edf1f3;background:#fff;text-align:left;padding:12px 11px;color:var(--ink);border-radius:10px}.side-item:last-child{border-bottom:0}.side-item b{display:block;color:var(--deep);font-size:.92rem}.side-item small{display:block;color:var(--muted);margin-top:3px}.side-item.active{background:var(--blue);color:#fff;box-shadow:0 7px 18px rgba(23,78,115,.2)}.side-item.active b,.side-item.active small{color:#fff}.library-content{min-height:520px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);scroll-margin-top:88px}.library-content h2{margin:5px 0;color:var(--blue);line-height:1.25}.library-content h3{color:var(--deep);margin:20px 0 7px}.library-content p{margin:7px 0}.content-list{display:grid;gap:8px;margin-top:12px}.content-line{display:grid;grid-template-columns:28px 1fr;gap:8px;align-items:start;padding:12px 13px;border-left:4px solid var(--orange);border-radius:9px;background:#f8fbfc}.content-line .child-number{color:var(--orange);font-weight:800}.content-line p{margin:0}.code-pill{display:inline-flex;background:var(--wash);color:var(--blue);border-radius:999px;padding:5px 9px;font-size:.75rem;font-weight:800}.video-frame{margin-top:14px;aspect-ratio:16/9;border-radius:16px;overflow:hidden;background:linear-gradient(135deg,var(--blue),var(--deep));display:grid;place-items:center;color:#fff;text-align:center;padding:18px}.video-frame iframe{width:100%;height:100%;border:0}.video-frame .play-ring{margin-bottom:9px}.auto-note{font-size:.86rem;color:var(--muted);padding:10px 12px;background:var(--wash);border-radius:10px;margin-top:13px}.qr-demo{width:190px;height:190px;margin:15px auto;display:grid;place-items:center;border:9px solid #fff;outline:1px solid var(--line);background:repeating-conic-gradient(#123850 0 25%,#fff 0 50%) 50%/22px 22px;color:#fff}.modal{position:fixed;inset:0;z-index:1000;background:rgba(4,26,39,.58);display:grid;place-items:center;padding:16px}.modal[hidden]{display:none}.modal-card{width:min(590px,100%);max-height:92vh;overflow:auto;background:#fff;border-radius:20px;padding:24px;box-shadow:0 24px 80px rgba(0,0,0,.28)}.modal h2{margin:0 0 8px;color:var(--blue)}.modal p{color:var(--muted)}.site-footer{text-align:center;color:var(--muted);font-size:.9rem;padding-top:28px;padding-bottom:95px}.site-footer nav{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;margin:13px 0}.site-footer nav a{border:1px solid var(--line);border-radius:999px;background:#fff;padding:7px 10px;text-decoration:none;color:var(--blue);font-weight:700}.site-footer>p{margin:8px 0}.copyright{max-width:780px;margin:0 auto 22px;text-align:left;border:1px solid var(--line);border-radius:14px;background:#fff;padding:12px 14px}.copyright summary{cursor:pointer;color:var(--blue);font-weight:800}.copyright div{font-size:.82rem}.floating-actions{position:fixed;z-index:80;left:14px;right:14px;bottom:17px;display:flex;justify-content:space-between;pointer-events:none}.floating-actions>*{pointer-events:auto;border:0;text-decoration:none;padding:11px 15px;border-radius:999px;font-weight:800;color:#fff;box-shadow:0 10px 28px rgba(0,78,160,.28)}.floating-actions button{background:var(--blue)}.floating-actions a{background:#0878e4}
@media(min-width:720px){.brand img{width:118px;height:118px}.card-grid{grid-template-columns:repeat(3,1fr)}.account-card{padding:15px 19px}}
@media(max-width:720px){html{scroll-padding-top:170px}.four-grid,.lesson-layout,.split{grid-template-columns:1fr}.four-grid>.door:last-child:nth-child(odd){grid-column:auto}.account-card,.offline-note{align-items:flex-start;flex-direction:column}.account-card .btn{width:100%}.panel{padding:16px}.library-tabs{top:0}.library-grid{grid-template-columns:1fr}.library-side{display:block;overflow:visible;padding:9px}.side-item{min-width:0;border-bottom:1px solid var(--line);padding:10px}.library-content{min-height:400px;scroll-margin-top:86px}.floating-actions{bottom:12px}.floating-actions>*{padding:10px 13px;font-size:.86rem}}
.library-wrap,.library-tabs,.library-grid,.library-side,.library-content{min-width:0;max-width:100%}.library-wrap,.library-grid,.library-tabs{width:100%}.library-tabs{overflow:hidden}.library-tabs .filter-row{width:100%;min-width:0;max-width:100%}.library-content{overflow-wrap:anywhere}
.side-item,.chip{text-decoration:none}.chip{display:inline-flex;align-items:center}.side-item{display:block}
.library-tabs .filter-row{flex-wrap:wrap;overflow:visible;padding-bottom:2px}.section-head.compact{margin-top:22px;margin-bottom:10px}.section-head.compact h3{margin:0;color:var(--deep)}.section-head.compact p{margin:3px 0 0;font-size:.86rem}.folder-grid,.lesson-list{display:grid;gap:9px}.folder-card,.lesson-row{width:100%;display:grid;grid-template-columns:auto 1fr auto;gap:11px;align-items:center;text-align:left;border:1px solid var(--line);border-radius:13px;background:#f9fbfc;color:var(--ink);padding:13px 14px}.folder-card:hover,.lesson-row:hover{border-color:var(--blue);background:var(--wash)}.folder-card b,.lesson-row b{display:block;color:var(--deep)}.folder-card small,.lesson-row small{display:block;color:var(--muted);margin-top:3px}.folder-icon,.lesson-index{width:32px;height:32px;border-radius:10px;background:var(--wash);color:var(--blue);display:grid;place-items:center;font-weight:800}.sub-back-row{display:flex;margin:-3px 0 13px}.sub-back{min-height:40px;padding:8px 12px}.breadcrumb{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:15px;color:var(--muted);font-size:.82rem}.breadcrumb button{border:0;background:none;padding:0;color:var(--blue);font-weight:800;text-align:left}.article-body{margin:18px 0;padding:18px;border-radius:13px;background:#f8fbfc;border-left:4px solid var(--orange);white-space:pre-wrap;line-height:1.75}.library-content .empty{padding:28px 16px;border:1px dashed var(--line);border-radius:13px;background:#fbfcfd}
.small{min-height:36px;padding:7px 11px;font-size:.82rem}.offline-note>div{display:flex;align-items:center;gap:10px;min-width:0}.offline-note .btn{margin-left:auto;flex:0 0 auto}.compact-actions{margin:0;justify-content:flex-end}.home-section{margin:22px 0}.home-grid{display:grid;gap:14px}.home-grid.three{grid-template-columns:repeat(3,1fr)}.home-grid.two{grid-template-columns:repeat(2,1fr)}.continue-card,.start-here{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 20px;margin-bottom:14px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)}.continue-card h2,.start-here h2{margin:3px 0;color:var(--blue);font-size:1.18rem}.continue-card p,.start-here p{margin:0;color:var(--muted)}.start-here{margin-top:22px;background:linear-gradient(135deg,#fff7ea,#fff)}.start-here .toolbar{margin:0;justify-content:flex-end}.inline-label{margin-left:8px}.search-row{position:relative;margin-bottom:9px}.search-row>input{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}.search-results{position:absolute;z-index:30;left:0;right:0;top:calc(100% + 4px);display:grid;max-height:320px;overflow:auto;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow)}.search-results button{border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;padding:11px 13px;color:var(--blue);font-weight:700}.search-results button:hover{background:var(--wash)}.empty-result{padding:13px;color:var(--muted)}.reading-tools,.next-prev{display:flex;justify-content:space-between;align-items:center;gap:10px}.reading-tools>div{display:flex;gap:6px}.next-prev{margin-top:22px}.next-prev>*{max-width:48%}.article-body{overflow-wrap:anywhere}.dashboard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.dashboard-grid>.panel h2{margin-top:0;color:var(--blue);font-size:1.15rem}.admin-row,.saved-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}.admin-row:last-child,.saved-row:last-child{border-bottom:0}.admin-row>div,.saved-row>div{min-width:0}.admin-row b,.saved-row b{display:block;color:var(--deep)}.admin-row small,.saved-row small{display:block;color:var(--muted);overflow-wrap:anywhere}.alert-row{border-left:4px solid var(--danger);padding-left:10px}.notice,.critical{padding:13px 15px;border-radius:13px;margin:12px 0}.notice{background:#eaf6ef;color:var(--ok)}.notice p,.critical p,.warning p{margin:4px 0 0}.critical{background:#fce9e6;color:var(--danger);border:1px solid #efc0ba}.curriculum{display:grid;gap:8px}.curriculum-row{display:grid;grid-template-columns:42px 1fr auto;gap:10px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}.curriculum-row b{display:block;color:var(--deep)}.curriculum-row small{display:block;color:var(--muted)}.lesson-row.done,.curriculum-row.done{background:#eaf6ef;border-color:#badbc8}.lesson-row.done .lesson-index{background:var(--ok);color:#fff}.error-text{color:var(--danger)!important;font-weight:700}.footer-tools{display:flex;gap:8px;flex-wrap:wrap}.footer-tools .btn{flex:1}.form-grid label{line-height:1.35}.account-card .toolbar{margin-bottom:0}
@media(max-width:840px){.home-grid.three{grid-template-columns:1fr 1fr}.home-grid.three>.door:last-child{grid-column:1/-1}.dashboard-grid{grid-template-columns:1fr}}
@media(max-width:720px){.home-grid.three,.home-grid.two{grid-template-columns:1fr}.home-grid.three>.door:last-child{grid-column:auto}.continue-card,.start-here{align-items:stretch;flex-direction:column}.continue-card .btn,.start-here .btn{width:100%}.start-here .toolbar{width:100%}.offline-note>div{align-items:flex-start;flex-direction:column;gap:2px}.offline-note .btn{width:100%;margin-left:0}.next-prev{align-items:stretch}.next-prev>*{max-width:50%;white-space:normal}.admin-row,.saved-row{align-items:stretch;flex-direction:column}.admin-row .btn,.saved-row .btn{width:100%}.curriculum-row{grid-template-columns:36px 1fr}.curriculum-row>:last-child{grid-column:2}.reading-tools{align-items:flex-start}.account-card .toolbar{width:100%;justify-content:stretch}.account-card .toolbar .btn{flex:1}}

/* Chuẩn bị tích hợp online: chuyển App, trạng thái đồng bộ, hướng dẫn cài đặt. */
body,button,input,select,textarea{font-family:"Lora",serif}
.app-switch a{white-space:nowrap;border:1px solid var(--line);border-radius:999px;background:#fff;padding:9px 13px;color:var(--blue);font-weight:750;text-decoration:none}.app-switch a.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.offline-note.online{background:#eef8f1;border-color:#bfe0ca}.offline-note.online b{color:var(--ok)}.offline-note.stale{background:#fff7ea;border-color:#f1d2a9}
.sync-state{display:inline-flex;align-items:center;gap:6px}.sync-dot{width:8px;height:8px;border-radius:50%;background:currentColor}
.install-steps{display:grid;gap:10px;margin:14px 0}.install-step{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start;border:1px solid var(--line);border-radius:13px;padding:11px}.install-step>span{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--wash);color:var(--blue);font-weight:800}.install-step b{display:block}.install-step small{color:var(--muted)}
.modal-card .share-options{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:14px 0}.modal-card .share-options .btn{width:100%}
.data-source-note{margin-top:12px;color:var(--muted);font-size:.82rem}.skeleton{min-height:180px;display:grid;place-items:center;color:var(--muted)}
.app-loading{min-height:clamp(300px,48vh,520px);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:32px 20px;border:1px solid var(--line);border-radius:22px;background:rgba(255,255,255,.96);box-shadow:var(--shadow)}.app-loading h2{margin:18px 0 6px;color:var(--blue);font-size:clamp(1.18rem,4vw,1.48rem)}.app-loading p{max-width:520px;margin:0;color:var(--muted)}.app-loading .btn{margin-top:18px}.app-loading .btn[hidden]{display:none}.qigong-loader{position:relative;width:92px;height:92px;display:grid;place-items:center}.qigong-loader img{width:68px;height:68px;border-radius:50%;object-fit:cover;box-shadow:0 8px 24px rgba(23,78,115,.2)}.qigong-loader span{position:absolute;inset:0;border-radius:50%;border:4px solid rgba(23,78,115,.12);border-top-color:var(--orange);border-right-color:var(--blue);animation:qigong-spin 1.8s linear infinite}.loading-dots{display:flex;gap:7px;margin-top:16px}.loading-dots i{width:7px;height:7px;border-radius:50%;background:var(--blue);animation:qigong-pulse 1.3s ease-in-out infinite}.loading-dots i:nth-child(2){animation-delay:.16s}.loading-dots i:nth-child(3){animation-delay:.32s}@keyframes qigong-spin{to{transform:rotate(360deg)}}@keyframes qigong-pulse{0%,70%,100%{opacity:.25;transform:translateY(0)}35%{opacity:1;transform:translateY(-4px)}}
.payment-qr{width:min(100%,360px);display:block;margin:14px auto;border:1px solid var(--line);border-radius:18px}
.video-frame iframe,.video-frame [data-youtube-player]{width:100%;height:100%;border:0;border-radius:inherit}.video-frame{min-height:260px}.field-help{display:block;color:var(--muted);font-size:.8rem;margin-top:5px}
@media(max-width:520px){.modal-card .share-options{grid-template-columns:1fr}.app-switch{justify-content:flex-start}.video-frame{min-height:210px}}

/* Điều hướng thư viện: giữ danh mục và đưa thẳng người dùng tới nội dung đã chọn. */
.mobile-library-selector{display:none}
.desktop-library-side{position:sticky;top:92px;max-height:calc(100vh - 112px);overflow:auto;overscroll-behavior:contain}
.library-content:focus-within{outline:none}
.library-content h2[tabindex="-1"],.library-content h3[tabindex="-1"]{outline:none}
.filter-row{scroll-snap-type:x proximity}
.filter-row .chip{scroll-snap-align:start}
.floating-actions{padding-bottom:env(safe-area-inset-bottom)}
.floating-actions>*{transition:padding .2s ease,font-size .2s ease,opacity .2s ease}
.floating-actions.compact>*{padding:8px 11px;font-size:.78rem;opacity:.94}
.site-footer{padding-bottom:calc(112px + env(safe-area-inset-bottom))}

@media(max-width:720px){
  html{scroll-padding-top:82px}
  .inner-route .brand{display:grid;grid-template-columns:54px 1fr;grid-template-rows:auto auto;column-gap:10px;text-align:left;align-items:center;padding-bottom:8px}
  .inner-route .brand img{grid-row:1/3;width:54px;height:54px}
  .inner-route .brand p{margin:0;font-size:.62rem;line-height:1.25}
  .inner-route .brand h1{margin:2px 0 0;font-size:.92rem;line-height:1.2}
  .inner-route .site-head{padding-top:7px}
  .inner-route .app-switch{padding-bottom:8px}
  .library-tabs{position:sticky;top:0;padding:8px;border-radius:13px}
  .library-tabs .filter-row{display:flex;flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;width:100%;padding-bottom:5px;scrollbar-width:none}
  .library-tabs .filter-row::-webkit-scrollbar{display:none}
  .mobile-library-selector{display:block;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow);overflow:hidden}
  .mobile-library-selector>summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:13px 14px;cursor:pointer;color:var(--deep)}
  .mobile-library-selector>summary::-webkit-details-marker{display:none}
  .mobile-library-selector>summary small,.mobile-library-selector>summary b{display:block}
  .mobile-library-selector>summary small{color:var(--muted);font-size:.72rem;margin-bottom:2px}
  .mobile-library-selector>summary b{font-size:.9rem;line-height:1.35}
  .selector-change{flex:0 0 auto;color:var(--blue);font-size:.78rem;font-weight:800;background:var(--wash);border-radius:999px;padding:6px 9px}
  .mobile-library-selector[open] .selector-change:after{content:" · đóng"}
  .mobile-selector-list{max-height:min(60vh,470px);overflow:auto;border-top:1px solid var(--line);padding:7px;overscroll-behavior:contain}
  .mobile-selector-list .side-item{padding:11px 10px}
  .desktop-library-side{display:none}
  .library-grid{display:block}
  .library-content{margin-top:10px;padding:17px;scroll-margin-top:92px}
  .floating-actions{left:auto;right:9px;bottom:calc(9px + env(safe-area-inset-bottom));gap:6px;flex-direction:column;align-items:flex-end}
  .floating-actions>*{padding:8px 10px;font-size:.76rem;text-align:center}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.floating-actions>*{transition:none}.qigong-loader span,.loading-dots i{animation:none}.loading-dots i{opacity:.65}}

/* Trải nghiệm thư viện thống nhất trên máy tính và điện thoại. */
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.library-selection-anchor{scroll-margin-top:16px}.library-selector{display:block;border:2px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow);overflow:hidden;margin-bottom:12px}.library-selector.has-selection{border-color:var(--blue);box-shadow:0 10px 28px rgba(23,78,115,.2)}.library-selector>summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;color:var(--deep)}.library-selector>summary::-webkit-details-marker{display:none}.library-selector>summary small,.library-selector>summary b{display:block}.library-selector>summary small{color:var(--muted);font-size:.75rem}.library-selector>summary b{font-size:1rem}.library-selector.has-selection>summary{background:linear-gradient(135deg,var(--blue),var(--deep));color:#fff}.library-selector.has-selection>summary small{color:#d9edf6}.library-selector.has-selection .selector-change{background:#fff;color:var(--blue)}.library-selector[open] .selector-change:after{content:" · đóng"}.mobile-selector-list{max-height:min(62vh,520px);overflow:auto;border-top:1px solid var(--line);padding:8px;overscroll-behavior:contain;background:#fff}.mobile-selector-list .side-item{width:100%;padding:12px;text-align:left}.library-content{margin-top:0;scroll-margin-top:14px}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.topic-card{display:grid;grid-template-columns:42px 1fr auto;gap:10px;align-items:center;text-align:left;padding:13px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--deep)}.topic-card:hover{border-color:var(--blue);background:var(--wash)}.topic-card b,.topic-card small{display:block}.topic-card small{color:var(--muted);margin-top:3px}.topic-number{width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:var(--wash);color:var(--blue);font-weight:800}.folder-group+.folder-group{margin-top:24px}.folder-group>h3{color:var(--blue)}.watch-state{margin-top:4px!important;font-weight:700}.watch-state.done{color:var(--ok)!important}.watch-state.started{color:#9a650d!important}.lesson-row.started{border-left:4px solid var(--orange)}.lesson-row.done{border-left:4px solid var(--ok)}.content-cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:13px;margin-bottom:12px}.detail-cover{max-height:320px}.document-viewer iframe{width:100%;height:min(70vh,720px);border:1px solid var(--line);border-radius:14px;background:#fff}.document-viewer small{color:var(--muted)}.payment-details{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0}.payment-details>div,.transfer-code{padding:11px;border:1px solid var(--line);border-radius:12px;background:var(--wash)}.payment-details small,.payment-details b,.transfer-code small,.transfer-code b{display:block}.transfer-code{margin:12px 0;text-align:center}.transfer-code b{font-size:1.1rem;color:var(--blue);letter-spacing:.04em}.modal-card{position:relative}.modal-close{position:absolute;right:12px;top:10px;width:38px;height:38px;border:0;border-radius:50%;background:var(--wash);color:var(--deep);font-size:1.5rem;line-height:1}.modal-card>h2:first-of-type{padding-right:38px}.install-steps.visual .install-step>span{width:46px;height:46px;font-size:1.35rem}.floating-icon{font-size:1.05rem}.floating-label{max-width:160px;overflow:hidden;white-space:nowrap;transition:max-width .2s ease,opacity .2s ease}.floating-actions.compact>*{width:44px;height:44px;padding:0;border-radius:50%;display:grid;place-items:center}.floating-actions.compact .floating-label{max-width:0;opacity:0}.floating-actions.compact .floating-icon{font-size:1.15rem}.floating-actions.compact>*:focus-within,.floating-actions.compact>*:hover{width:auto;padding:0 13px;border-radius:999px;grid-auto-flow:column;gap:7px}.floating-actions.compact>*:focus-within .floating-label,.floating-actions.compact>*:hover .floating-label{max-width:160px;opacity:1}

@media(max-width:720px){
  .topic-grid{grid-template-columns:1fr}.topic-card{grid-template-columns:38px 1fr auto}.library-selection-anchor{scroll-margin-top:8px}.library-content{padding:16px}.payment-details{grid-template-columns:1fr}.inner-route .offline-note{padding:8px 10px}.inner-route .offline-note span{font-size:.78rem}.inner-route .account-card{padding:9px 11px}.inner-route .account-card p{font-size:.78rem}.inner-route .account-card .btn{padding:8px 10px;font-size:.78rem}.floating-actions.compact>*:hover{width:44px;padding:0;border-radius:50%}.floating-actions.compact>*:hover .floating-label{max-width:0;opacity:0}
}