:root{--bg:#f4f6fc;--card:#fff;--ink:#0e1230;--muted:#6b7190;--line:#e3e7f5;--pri:#151598;--pri2:#3b34c9;--gold:#c8a127;--gold2:#e0b93f;--ok:#10b981;--warn:#f59e0b;--bad:#ef4444;
--sp:#ec4899;--li:#0ea5e9;--re:#10b981;--wr:#f59e0b;--vo:#8b5cf6;--pr:#ef4444;--of:#4f46e5;--r:16px;--sh:0 4px 24px rgba(20,26,51,.06)}
:root[data-theme=dark]{--bg:#070a1c;--card:#111536;--ink:#eef0fb;--muted:#9aa0bf;--line:#262b45;--sh:0 4px 24px rgba(0,0,0,.35)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#070a1c;--card:#111536;--ink:#eef0fb;--muted:#9aa0bf;--line:#262b45;--sh:0 4px 24px rgba(0,0,0,.35)}}
*{box-sizing:border-box}html,body{margin:0}body{font-family:'Plus Jakarta Sans','Hind Siliguri',system-ui,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5}
.bn{font-family:'Hind Siliguri',sans-serif}
a{color:var(--pri)}button{font:inherit;cursor:pointer}input,select,textarea{font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:12px;padding:11px 13px;width:100%}
textarea{min-height:160px;resize:vertical}input:focus,textarea:focus,select:focus{outline:2px solid var(--pri);border-color:transparent}
[hidden]{display:none!important}.muted{color:var(--muted)}h1,h2,h3{margin:0;line-height:1.25}h2{font-size:18px}h3{font-size:15px}
/* layout */
#app{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.side{position:sticky;top:0;height:100vh;background:var(--card);border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:14px;overflow:auto}
.brand{display:flex;gap:10px;align-items:center}.brand b{display:block}.brand small{color:var(--muted);font-size:12px}
.logo{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;display:grid;place-items:center;font-weight:800}
.brand.big .logo{width:52px;height:52px;font-size:20px}
.brand-logo{height:34px;width:auto;display:block}
:root[data-theme=dark] .brand-logo{filter:brightness(0) invert(1)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .brand-logo{filter:brightness(0) invert(1)}}
.side .brand a{text-decoration:none}.side .brand{padding:4px 2px 2px}.side .brand small{letter-spacing:.06em;text-transform:uppercase;font-size:10px;font-weight:700;color:var(--gold)}
#nav{display:flex;flex-direction:column;gap:2px}
#nav a,.bottom a{display:flex;gap:10px;align-items:center;padding:9px 12px;border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600;font-size:14px}
#nav a:hover{background:var(--bg)}#nav a.on{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff}
#nav .sec{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:10px 12px 2px}
.side-foot{margin-top:auto;display:flex;gap:6px}
main{padding:22px 28px 90px;min-width:0}
.top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:18px}.top h1{font-size:24px}
.top-r{display:flex;gap:8px;align-items:center}.chip{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:5px 11px;font-weight:700;font-size:13px;white-space:nowrap}
.icon-btn{background:var(--card);border:1px solid var(--line);border-radius:50%;width:36px;height:36px}
.bottom{display:none}
/* cards */
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--sh);min-width:0}
.card-h{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:8px}
.hero{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0;position:relative;overflow:hidden}
.hero .muted{color:rgba(255,255,255,.8)}.hero:after{content:'';position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.08)}
.count{font-size:34px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .v{font-size:26px;font-weight:800}.stat .l{color:var(--muted);font-size:13px}
.bar{height:8px;background:var(--line);border-radius:9px;overflow:hidden}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--pri),var(--pri2));border-radius:9px;transition:width .5s}
.hero .bar{background:rgba(255,255,255,.25)}.hero .bar i{background:#fff}
.btn{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:9px 15px;border-radius:11px;font-weight:700;display:inline-flex;gap:6px;align-items:center;justify-content:center;text-decoration:none}
.btn.primary{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0}.btn.ok{background:var(--ok);color:#fff;border:0}.btn.bad{background:var(--bad);color:#fff;border:0}
.btn.ghost{background:transparent}.btn.sm{padding:6px 10px;font-size:13px}.btn.wide{width:100%}.btn:disabled{opacity:.5}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}.stack>*+*{margin-top:10px}
.tag{font-size:11px;font-weight:700;padding:3px 8px;border-radius:999px;text-transform:uppercase;letter-spacing:.04em;background:var(--bg);white-space:nowrap}
.s-speaking{--c:var(--sp)}.s-listening{--c:var(--li)}.s-reading{--c:var(--re)}.s-writing{--c:var(--wr)}.s-vocabulary{--c:var(--vo)}.s-presentation{--c:var(--pr)}.s-offline{--c:var(--of)}.s-habit{--c:var(--muted)}.s-grammar{--c:var(--vo)}
.tag[class*=s-]{background:color-mix(in srgb,var(--c) 15%,transparent);color:var(--c)}
/* tasks */
.task{display:flex;gap:12px;padding:12px;border:1px solid var(--line);border-radius:14px;align-items:flex-start;border-left:4px solid var(--c,var(--pri))}
.task+.task{margin-top:8px}.task.done{opacity:.6}.task.done .tt{text-decoration:line-through}
.check{flex:none;width:26px;height:26px;border-radius:8px;border:2px solid var(--line);background:none;display:grid;place-items:center;color:#fff;font-size:14px}
.task.done .check{background:var(--ok);border-color:var(--ok)}
.tt{font-weight:700}.td{color:var(--muted);font-size:13px;white-space:pre-line;margin-top:2px}
/* habits */
.habit{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:12px;cursor:pointer;user-select:none;transition:.15s}
.habit+.habit{margin-top:6px}.habit.on{background:color-mix(in srgb,var(--ok) 12%,transparent);border-color:var(--ok)}.habit .check{pointer-events:none}.habit.on .check{background:var(--ok);border-color:var(--ok)}
.heat{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;grid-auto-columns:14px;gap:3px;overflow-x:auto;padding-bottom:4px}
.heat i{border-radius:3px;background:var(--line)}
.ring{--p:0;width:120px;height:120px;border-radius:50%;background:conic-gradient(var(--pri) calc(var(--p)*1%),var(--line) 0);display:grid;place-items:center}
.ring>div{width:92px;height:92px;border-radius:50%;background:var(--card);display:grid;place-items:center;font-weight:800;font-size:22px}
/* timeline */
.week{display:grid;grid-template-columns:54px 1fr;gap:14px;padding:14px;border:1px solid var(--line);border-radius:14px;cursor:pointer}
.week+.week{margin-top:8px}.week.cur{border-color:var(--pri);box-shadow:0 0 0 3px color-mix(in srgb,var(--pri) 20%,transparent)}.week.past{opacity:.75}
.wn{width:54px;height:54px;border-radius:14px;background:var(--bg);display:grid;place-items:center;font-weight:800;text-align:center;line-height:1.1;font-size:12px}.wn b{font-size:20px;display:block}
.week.cur .wn{background:var(--pri);color:#fff}
.daycol{border:1px solid var(--line);border-radius:12px;padding:10px}.daycol h4{margin:0 0 6px;font-size:13px}
/* flashcards */
.flash{perspective:1000px;height:240px;cursor:pointer}.flash-in{position:relative;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flash.flip .flash-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center}
.face.front{background:linear-gradient(135deg,var(--vo),var(--pri));color:#fff}.face.front .w{font-size:36px;font-weight:800}
.face.back{background:var(--card);border:2px solid var(--vo);transform:rotateY(180deg)}.face.back .m{font-size:24px;font-weight:600}
.boxes{display:flex;gap:6px}.boxes span{flex:1;text-align:center;padding:6px;border-radius:10px;background:var(--bg);font-size:12px}.boxes b{display:block;font-size:18px}
.opt{display:block;width:100%;text-align:left;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font-weight:600}
.opt+.opt{margin-top:8px}.opt:hover{border-color:var(--pri)}.opt.right{background:color-mix(in srgb,var(--ok) 18%,transparent);border-color:var(--ok)}.opt.wrong{background:color-mix(in srgb,var(--bad) 15%,transparent);border-color:var(--bad)}
.match{display:grid;grid-template-columns:1fr 1fr;gap:8px}.match button{padding:12px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink);font-weight:600;min-height:52px}
.match button.sel{border-color:var(--pri);background:color-mix(in srgb,var(--pri) 12%,transparent)}.match button.gone{visibility:hidden}.match button.bad{animation:shake .3s}
@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.pill-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}.pill-tabs button{border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:7px 14px;font-weight:700;font-size:13px}
.pill-tabs button.on{background:var(--ink);color:var(--card);border-color:var(--ink)}
.big-timer{font-size:56px;font-weight:800;text-align:center;font-variant-numeric:tabular-nums}
.rec-dot{width:12px;height:12px;border-radius:50%;background:var(--bad);display:inline-block;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.3}}
.transcript{min-height:70px;padding:12px;border:1px dashed var(--line);border-radius:12px}
.diff .ok{color:var(--ok);font-weight:700}.diff .miss{color:var(--bad);text-decoration:line-through}
table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-size:12px;text-transform:uppercase}
.tbl-wrap{overflow-x:auto}
.res{display:flex;gap:12px;padding:12px;border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink);align-items:center}
.res:hover{border-color:var(--pri)}.res .ic{width:42px;height:42px;border-radius:12px;background:var(--bg);display:grid;place-items:center;font-size:20px;flex:none}
.hbars{display:flex;align-items:flex-end;gap:6px;height:120px}.hbars div{flex:1;background:linear-gradient(var(--pri2),var(--pri));border-radius:6px 6px 2px 2px;min-height:3px;position:relative}
.hbars div span{position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);font-size:10px;color:var(--muted)}
.ann{border-left:4px solid var(--warn);padding:8px 12px;background:color-mix(in srgb,var(--warn) 10%,transparent);border-radius:0 10px 10px 0}.ann+.ann{margin-top:8px}
/* auth — brand login */
.auth{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr;background:var(--bg)}
.auth-art{position:relative;overflow:hidden;color:#fff;padding:48px;display:flex;flex-direction:column;justify-content:center;gap:22px;
  background:linear-gradient(140deg,#010186 0%,#151598 45%,#2a23b5 100%)}
.auth-art:before,.auth-art:after{content:'';position:absolute;border-radius:50%;filter:blur(2px);opacity:.22}
.auth-art:before{width:520px;height:520px;right:-180px;top:-140px;background:radial-gradient(circle,var(--gold2),transparent 62%);animation:float 14s ease-in-out infinite}
.auth-art:after{width:420px;height:420px;left:-150px;bottom:-160px;background:radial-gradient(circle,#6f6bff,transparent 62%);animation:float 18s ease-in-out infinite reverse}
@keyframes float{50%{transform:translate3d(18px,26px,0) scale(1.06)}}
.auth-art>*{position:relative;z-index:1}
.auth-art h1{font-size:34px;line-height:1.15;letter-spacing:-.02em;max-width:15ch}
.auth-art .lead{color:rgba(255,255,255,.82);max-width:42ch;font-size:15px}
.auth-art .gold{color:var(--gold2)}
.auth-feats{display:grid;gap:10px;max-width:420px}
.auth-feats>div{display:flex;gap:12px;align-items:center;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);padding:11px 14px;border-radius:14px;backdrop-filter:blur(6px);font-size:14px}
.auth-feats>div>div{flex:1;min-width:0}.auth-feats b{display:block;white-space:nowrap}.auth-feats small{color:rgba(255,255,255,.75)}
.auth-stats{display:flex;gap:26px;flex-wrap:wrap}.auth-stats b{display:block;font-size:24px;color:var(--gold2)}.auth-stats small{color:rgba(255,255,255,.7)}
.auth-side{display:grid;place-items:center;padding:28px 20px}
.auth-card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line);border-radius:26px;padding:32px 28px;box-shadow:0 24px 70px rgba(10,12,50,.14);text-align:center}
.auth-card .brand-logo{height:46px;margin:0 auto 6px}
.auth-card .hi{font-size:22px;font-weight:800;margin-top:14px}.auth-card .sub{color:var(--muted);font-size:14px;margin-top:2px}
.auth-card form{margin-top:16px;text-align:left}.auth-card form>*+*{margin-top:10px}
.auth-card input{padding:13px 15px;border-radius:14px;background:var(--bg)}
.auth-card .btn.primary{padding:13px;border-radius:14px;font-size:15px;background:linear-gradient(135deg,var(--pri),var(--pri2));box-shadow:0 10px 24px color-mix(in srgb,var(--pri) 35%,transparent)}
.auth-card .btn.primary:hover{filter:brightness(1.08)}
.tabs{display:flex;background:var(--bg);border-radius:14px;padding:4px;margin:18px 0 6px}
.tabs button{flex:1;border:0;background:none;padding:10px;border-radius:11px;font-weight:700;color:var(--muted)}
.tabs button.on{background:var(--card);color:var(--pri);box-shadow:var(--sh)}
.err{color:var(--bad);font-size:13px;min-height:1em;margin:6px 0 0}
.auth-foot{margin-top:16px;font-size:12px;color:var(--muted);line-height:1.7}
.auth-chips{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.auth-chips span{font-size:11px;font-weight:700;padding:5px 10px;border-radius:999px;background:var(--bg);color:var(--muted)}
@media (max-width:900px){.auth{grid-template-columns:1fr}.auth-art{display:none}
 .auth-side{background:linear-gradient(160deg,#010186,#2a23b5 65%,var(--bg) 65%);min-height:100vh;align-content:center}
 .auth-card{box-shadow:0 20px 50px rgba(0,0,0,.25)}}
#toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:var(--card);padding:10px 18px;border-radius:12px;font-weight:600;opacity:0;transition:.25s;pointer-events:none;z-index:99;max-width:90vw}
#toast.show{opacity:1;transform:translateX(-50%)}
.modal{position:fixed;inset:0;background:rgba(10,12,25,.6);display:grid;place-items:center;z-index:80;padding:16px}
.modal-box{background:var(--card);border-radius:20px;padding:22px;max-width:640px;width:100%;max-height:88vh;overflow:auto;position:relative}
.modal .x{position:absolute;right:12px;top:12px;border:0;background:var(--bg);border-radius:50%;width:32px;height:32px;color:var(--ink)}
/* 120-day plan grid */
.daygrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}
.daycard{display:flex;flex-direction:column;gap:5px;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--card);text-decoration:none;color:var(--ink);transition:.15s}
.daycard:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(10,12,50,.12);border-color:var(--pri)}
.daycard .dn{font-size:15px}.daycard .dt{font-size:12.5px;color:var(--muted);min-height:32px;line-height:1.3}
.daycard.cur{border-color:var(--gold);box-shadow:0 0 0 3px color-mix(in srgb,var(--gold) 28%,transparent)}
.daycard.past{opacity:.72}.daycard.full{background:linear-gradient(160deg,color-mix(in srgb,var(--ok) 12%,var(--card)),var(--card));border-color:color-mix(in srgb,var(--ok) 45%,var(--line))}
.daycard .bar{height:5px}
@media (max-width:560px){.daygrid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}}
/* people, chat, badges, gradients */
.grad-1{background:linear-gradient(135deg,color-mix(in srgb,var(--pri) 12%,var(--card)),var(--card))}
.grad-2{background:linear-gradient(135deg,color-mix(in srgb,var(--sp) 12%,var(--card)),var(--card))}
.card{transition:transform .18s,box-shadow .18s}.person:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(20,26,51,.12)}
.ava{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-weight:800;color:#fff;flex:none;background:linear-gradient(135deg,var(--pri),var(--pri2))}
.ava.superadmin{background:linear-gradient(135deg,#f59e0b,#ef4444)}.ava.admin{background:linear-gradient(135deg,#0ea5e9,#4f46e5)}.ava.partner{background:linear-gradient(135deg,#10b981,#0ea5e9)}.ava.student{background:linear-gradient(135deg,#8b5cf6,#ec4899)}
#nav a.badge:after,.bottom a.badge:after{content:attr(data-badge);background:var(--bad);color:#fff;border-radius:999px;font-size:10px;padding:1px 6px;margin-left:auto;font-weight:800}
.icon-btn.dot{position:relative}.icon-btn.dot:after{content:'';position:absolute;top:6px;right:6px;width:9px;height:9px;border-radius:50%;background:var(--bad)}
.badge-n{background:var(--bad);color:#fff;border-radius:999px;font-size:11px;padding:1px 7px;font-weight:800}
.chatwrap{display:grid;grid-template-columns:270px 1fr;gap:16px;height:calc(100vh - 150px);min-height:460px}
.chatlist{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px;overflow:auto}
.citem{display:flex;gap:10px;align-items:center;padding:9px;border-radius:12px;cursor:pointer}.citem:hover{background:var(--bg)}.citem.un b{font-weight:800}
.chatmain{display:flex;flex-direction:column;padding:0;overflow:hidden}.chatmain .empty{margin:auto;padding:20px;text-align:center}
.chead{display:flex;gap:10px;align-items:center;padding:12px;border-bottom:1px solid var(--line)}
.msgs{flex:1;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:linear-gradient(180deg,transparent,color-mix(in srgb,var(--pri) 4%,transparent))}
.msg{display:flex;gap:8px;max-width:78%}.msg.me{margin-left:auto;flex-direction:row-reverse}
.bub{background:var(--card);border:1px solid var(--line);padding:9px 13px;border-radius:16px 16px 16px 4px;position:relative}
.msg.me .bub{background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:0;border-radius:16px 16px 4px 16px}
.msg.me .bub a{color:#fff}.mn{font-size:12px;color:var(--pri);display:block}.tm{font-size:10px;opacity:.6;display:block;text-align:right;margin-top:3px}
.composer{display:flex;gap:8px;align-items:flex-end;padding:10px;border-top:1px solid var(--line)}
.composer textarea{flex:1;min-height:44px;max-height:140px;border-radius:14px;resize:none}
@media (max-width:820px){.chatwrap{grid-template-columns:1fr;height:auto}.chatlist{max-height:180px}.chatmain{height:70vh}.msg{max-width:88%}}
/* reader / player */
.reader{position:fixed;inset:0;z-index:60;background:var(--bg);display:flex;flex-direction:column}
.reader.night{background:#05070f}.reader.night #pc{filter:invert(1) hue-rotate(180deg) contrast(.92)}
.rtop{display:flex;gap:8px;align-items:center;padding:8px 12px;background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap;padding-top:max(8px,env(safe-area-inset-top))}
.rtitle{flex:1;min-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.rbar{height:4px;background:var(--line)}.rbar i{display:block;height:100%;background:linear-gradient(90deg,var(--pri),var(--pri2));transition:width .3s}
.rbody{flex:1;overflow:auto;display:flex;padding:16px;-webkit-overflow-scrolling:touch}
.pdfwrap{margin:auto}#pc{max-width:100%;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,.25);background:#fff}
.vwrap{margin:auto;width:100%;max-width:960px;aspect-ratio:16/9}.vwrap iframe,.vwrap video,.vwrap>div{width:100%;height:100%;border:0;border-radius:14px;background:#000}
/* floating premium player */
.fplayer{position:fixed;right:20px;bottom:20px;z-index:70;background:linear-gradient(160deg,#0b0e28,#171b46);border:1px solid rgba(255,255,255,.14);
 border-radius:18px;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.45);color:#fff;display:flex;flex-direction:column;backdrop-filter:blur(10px)}
.fplayer.sm{width:290px}.fplayer.md{width:440px}.fplayer.lg{width:660px}
.fplayer.full{inset:3vh 4vw auto;width:auto;height:94vh;right:4vw;bottom:auto}
.fplayer.dragging{opacity:.92;cursor:grabbing}
.fp-head{display:flex;align-items:center;gap:8px;padding:8px 10px;cursor:grab;background:linear-gradient(90deg,rgba(200,161,39,.22),transparent)}
.fp-dot{width:8px;height:8px;border-radius:50%;background:#e0b93f;box-shadow:0 0 10px #e0b93f;flex:none}
.fp-title{flex:1;min-width:0;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fp-time{font-size:11px;opacity:.75;font-variant-numeric:tabular-nums}
.fp-sizes{display:flex;gap:3px}.fp-sizes button,.fp-x{background:rgba(255,255,255,.12);border:0;color:#fff;border-radius:8px;width:26px;height:24px;font-size:11px;font-weight:700}
.fp-sizes button.on{background:var(--gold);color:#101}
.fp-x{background:rgba(255,80,80,.25)}
.fp-body{position:relative;aspect-ratio:16/9;background:#000}.fplayer.full .fp-body{flex:1;aspect-ratio:auto}
.fp-body iframe,.fp-body video{width:100%;height:100%;border:0;display:block}
.fp-audio{display:grid;place-items:center;gap:10px;height:100%;padding:14px}.fp-wave{font-size:40px}
.fp-audio audio{width:100%}
.fp-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:6px 10px;font-size:11px;background:rgba(0,0,0,.3)}
.fp-foot .muted{color:rgba(255,255,255,.55)}
@media (max-width:640px){.fplayer{left:8px;right:8px;bottom:78px}.fplayer.sm,.fplayer.md,.fplayer.lg{width:auto}}
/* continuous scrolling pdf */
.contwrap{display:flex;flex-direction:column;gap:14px;align-items:center;padding:8px 0 40px;width:100%}
.cpage{position:relative;min-height:120px}
.cpage canvas{border-radius:6px;box-shadow:0 6px 24px rgba(0,0,0,.18);background:#fff;display:block}
.cnum{position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.55);color:#fff;font-size:11px;padding:2px 8px;border-radius:999px}
.reader.night .cpage canvas{filter:invert(1) hue-rotate(180deg) contrast(.92)}
.pdfwrap{position:relative}
.textlayer{position:absolute;inset:0;overflow:hidden;line-height:1;opacity:.22;pointer-events:auto}
.textlayer span{position:absolute;color:transparent;white-space:pre;cursor:text;transform-origin:0 0}
.textlayer span::selection{background:rgba(80,80,255,.45)}
.textlayer span.hit{background:rgba(255,215,0,.85);border-radius:2px}
.tstrip{display:flex;gap:8px;overflow-x:auto;padding:8px 12px;background:var(--card);border-top:1px solid var(--line)}
.tstrip canvas{border:2px solid var(--line);border-radius:6px;cursor:pointer;flex:none;background:#fff}
.tstrip canvas:hover{border-color:var(--pri)}
.pageframe{position:relative;width:100%;height:100%}.pageframe iframe{width:100%;height:100%;border:0;background:#fff}
.frame-fallback{position:absolute;inset:0;display:grid;place-items:center;background:var(--bg)}
.storywrap{max-width:760px;margin:auto;padding:10px 6px 60px}
.storywrap p{transition:.2s;border-radius:8px;padding:2px 6px}
#ptext p.speaking,#ltrans p.speaking{background:color-mix(in srgb,var(--gold) 28%,transparent)}
.pw{cursor:pointer;border-radius:3px}.pw:hover{background:color-mix(in srgb,var(--pri) 18%,transparent)}
.ielts{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:1150px;margin:auto;width:100%;align-content:start}
.qb{padding:12px;border:1px solid var(--line);border-radius:14px;margin-bottom:10px}
.qb label.opt{cursor:pointer}.qb label.right{background:color-mix(in srgb,var(--ok) 18%,transparent);border-color:var(--ok)}
.qb label.wrong{background:color-mix(in srgb,var(--bad) 15%,transparent);border-color:var(--bad)}
@media (max-width:820px){.ielts{grid-template-columns:1fr}}
.rnotes{position:absolute;right:0;top:56px;bottom:0;width:min(380px,92vw);background:var(--card);border-left:1px solid var(--line);padding:14px;overflow:auto;box-shadow:-8px 0 30px rgba(0,0,0,.15)}
.rnotes form>*+*{margin-top:8px}
@media (max-width:820px){.rtop{gap:6px;font-size:13px}.rtop .btn.sm{padding:6px 9px}.rbody{padding:8px}}
.confetti{position:fixed;top:-10px;width:8px;height:14px;z-index:98;animation:fall 1.6s linear forwards}@keyframes fall{to{transform:translateY(105vh) rotate(720deg)}}
@media (max-width:1100px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:820px){
 #app{grid-template-columns:1fr}.side{display:none}main{padding:14px 16px 96px}
 .g2,.g3{grid-template-columns:1fr}.top h1{font-size:20px}.count{font-size:28px}
 .bottom{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--card);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:40;justify-content:space-around}
 .bottom a{flex-direction:column;gap:0;font-size:11px;padding:6px 4px;flex:1}.bottom a .e{font-size:20px}.bottom a.on{color:var(--pri)}
 #streakChip{display:none}
}