:root{--navy:#0f2747;--navy2:#1b3a66;--gold:#c9a227;--gold2:#e6c65a;--bg:#f4f6fa;--card:#fff;--text:#1d2433;--muted:#667085;--line:#e4e7ec;--ok:#12805c;--bad:#c0392b;--warn:#b7791f;--radius:14px;--shadow:0 1px 2px rgba(16,24,40,.06),0 4px 16px rgba(16,24,40,.06)}
*{box-sizing:border-box}html,body{margin:0}body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.55;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--navy2)}h1,h2,h3,h4{margin:.2em 0 .5em;line-height:1.25}h1,h2{font-family:Merriweather,Georgia,serif;color:var(--navy)}
.container{width:100%;max-width:1160px;margin:0 auto;padding:22px 18px 48px;flex:1}
.loading{padding:60px;text-align:center;color:var(--muted)}
/* top bar */
.topbar{background:var(--navy);color:#fff;position:sticky;top:0;z-index:30;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.topbar .inner{max-width:1160px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:10px 18px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:700;letter-spacing:.2px}
.monogram{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--gold),var(--gold2));color:var(--navy);display:grid;place-items:center;font-family:Merriweather,serif;font-weight:900;font-size:15px;letter-spacing:-.5px;box-shadow:inset 0 0 0 2px rgba(15,39,71,.25)}
.monogram.lg{width:64px;height:64px;font-size:24px;border-radius:16px}
.brand img{height:38px}.brand small{display:block;font-weight:500;font-size:11px;color:var(--gold2);letter-spacing:1.2px;text-transform:uppercase}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:#dbe4f3;text-decoration:none;padding:8px 12px;border-radius:8px;font-weight:500;font-size:14px}
.nav a.active,.nav a:hover{background:rgba(255,255,255,.1);color:#fff}
.nav .pill{background:var(--gold);color:var(--navy);font-weight:700}
.menu-btn{display:none;margin-left:auto;background:none;border:0;color:#fff;font-size:24px;cursor:pointer}
@media (max-width:820px){.menu-btn{display:block}.nav{display:none;position:absolute;top:58px;left:0;right:0;background:var(--navy);flex-direction:column;align-items:stretch;padding:8px 12px 14px}.nav.open{display:flex}.nav a{padding:12px}}
.footer{background:#0b1d36;color:#9fb0c9;text-align:center;padding:18px;font-size:13px}.footer b{color:var(--gold2)}
/* ui */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;border:1px solid var(--line)}
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.g2,.g3{grid-template-columns:1fr}.g4{grid-template-columns:repeat(2,1fr)}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;padding:11px 18px;font-weight:600;font-size:14px;cursor:pointer;text-decoration:none;background:var(--navy);color:#fff;transition:.15s;font-family:inherit}
.btn:hover{background:var(--navy2)}.btn.gold{background:var(--gold);color:var(--navy)}.btn.gold:hover{background:var(--gold2)}
.btn.ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}.btn.ghost:hover{border-color:var(--navy)}
.btn.danger{background:var(--bad)}.btn.sm{padding:7px 12px;font-size:13px}.btn.block{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}
input,select,textarea{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;font:inherit;background:#fff}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--navy2);box-shadow:0 0 0 3px rgba(27,58,102,.12)}
label{font-weight:600;font-size:13px;display:block;margin:12px 0 6px;color:#344054}
.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}.right{text-align:right}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.spacer{flex:1}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:11.5px;font-weight:700;background:#eef2f8;color:var(--navy2);letter-spacing:.2px}
.badge.gold{background:#fbf3d6;color:#7a5d00}.badge.ok{background:#e3f5ee;color:var(--ok)}.badge.bad{background:#fbe9e7;color:var(--bad)}.badge.sample{background:#fff1e0;color:#9a4d00;border:1px dashed #e0a458}
.progress{height:10px;background:#e9edf4;border-radius:99px;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--navy2),var(--gold));border-radius:99px;transition:width .6s}
.progress.thin{height:6px}
.stat{font-size:28px;font-weight:800;color:var(--navy)}.stat-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;font-weight:600}
.page-head{display:flex;align-items:flex-end;gap:12px;flex-wrap:wrap;margin-bottom:18px}.page-head h1{margin:0}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:6px}.crumbs a{text-decoration:none}
table{width:100%;border-collapse:collapse}th,td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}th{font-size:12px;text-transform:uppercase;color:var(--muted);letter-spacing:.5px}
.table-wrap{overflow-x:auto}
.toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%) translateY(120px);background:var(--navy);color:#fff;padding:12px 20px;border-radius:10px;font-weight:600;transition:.3s;z-index:99;max-width:90vw}.toast.show{transform:translateX(-50%) translateY(0)}.toast.err{background:var(--bad)}
.alert{padding:12px 14px;border-radius:10px;background:#fff8e1;border:1px solid #f3d27a;color:#6b4e00;font-size:14px}.alert.info{background:#eaf1fb;border-color:#b9cdef;color:#1b3a66}.alert.err{background:#fdecea;border-color:#f5b7b1;color:#8e2a1f}
/* landing */
.hero{background:radial-gradient(1200px 400px at 80% -10%,rgba(201,162,39,.35),transparent),linear-gradient(135deg,var(--navy),#12325c);color:#fff;border-radius:22px;padding:48px 36px;display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:center}
.hero h1{color:#fff;font-size:38px}.hero p{color:#c9d6ea;font-size:17px}.hero .kicker{color:var(--gold2);text-transform:uppercase;letter-spacing:2px;font-size:12px;font-weight:700}
@media(max-width:820px){.hero{grid-template-columns:1fr;padding:30px 22px}.hero h1{font-size:28px}}
.auth-card{background:#fff;color:var(--text);border-radius:18px;padding:24px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.tabs{display:flex;background:#eef2f8;border-radius:10px;padding:4px;margin-bottom:6px}.tabs button{flex:1;border:0;background:none;padding:9px;border-radius:8px;font-weight:600;cursor:pointer;color:var(--muted);font-family:inherit}.tabs button.active{background:#fff;color:var(--navy);box-shadow:var(--shadow)}
.feature{display:flex;gap:12px}.feature .ic{width:40px;height:40px;border-radius:10px;background:#fbf3d6;display:grid;place-items:center;font-size:20px;flex:none}
.subj-chip{display:flex;justify-content:space-between;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff}
/* dashboard */
.ring{position:relative;width:150px;height:150px}.ring svg{transform:rotate(-90deg)}.ring .val{position:absolute;inset:0;display:grid;place-items:center;text-align:center}.ring .val b{font-size:32px;color:var(--navy);display:block;line-height:1}
.subj-card{display:flex;flex-direction:column;gap:10px}.subj-card .code{font-weight:800;color:var(--gold);font-size:13px;letter-spacing:1px}
.chart{width:100%;overflow-x:auto}.bars{display:flex;align-items:flex-end;gap:10px;height:180px;padding:10px 4px 0;border-bottom:1px solid var(--line);position:relative}
.bars .b{flex:1;min-width:26px;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px}.bars .b i{display:block;width:100%;max-width:42px;border-radius:6px 6px 0 0;background:linear-gradient(180deg,var(--gold),#a88418)}.bars .b i.fail{background:linear-gradient(180deg,#8aa4c8,var(--navy2))}.bars .b small{font-size:11px;color:var(--muted)}
.bars .passline{position:absolute;left:0;right:0;border-top:2px dashed var(--bad);opacity:.6}.bars .passline span{position:absolute;left:0;top:-17px;background:#fff;padding:0 4px;font-size:11px;color:var(--bad);font-weight:600}
.xlabels{display:flex;gap:10px;padding:4px}.xlabels span{flex:1;min-width:26px;text-align:center;font-size:10.5px;color:var(--muted)}
/* learning center */
.chapter{display:flex;gap:14px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff}
.chapter .num{width:36px;height:36px;border-radius:50%;background:#eef2f8;color:var(--navy);font-weight:800;display:grid;place-items:center;flex:none}
.chapter.locked{background:#fafbfc}.chapter.locked .num{background:#f1f1f1;color:#999}
.chapter .num.done{background:var(--ok);color:#fff}
@media(max-width:600px){.chapter{flex-wrap:wrap}.chapter .acts{width:100%;display:flex;gap:8px}.chapter .acts .btn{flex:1}}
.lesson{font-size:16px;line-height:1.75}.lesson h4{color:var(--navy);margin-top:1.2em}.lesson li{margin:.35em 0}
.paywall{text-align:center;padding:36px 22px;background:linear-gradient(180deg,#fff,#fbf7e8);border:1.5px dashed var(--gold)}.paywall .lock{font-size:40px}
/* exam */
.exam{display:grid;grid-template-columns:1fr 290px;gap:18px;align-items:start}@media(max-width:900px){.exam{grid-template-columns:1fr}}
.exam-top{position:sticky;top:58px;z-index:10;background:var(--bg);padding:8px 0 10px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:20px;color:var(--navy);background:#fff;border:1.5px solid var(--line);padding:6px 14px;border-radius:10px}.timer.low{color:var(--bad);border-color:var(--bad);animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.6}}
.qtext{font-size:18px;font-weight:600;margin:6px 0 16px}
.choice{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;padding:14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;margin-bottom:10px;cursor:pointer;font:inherit;font-size:15.5px;transition:.12s}
.choice:hover{border-color:#9fb3d1}.choice .lt{width:30px;height:30px;border-radius:8px;background:#eef2f8;display:grid;place-items:center;font-weight:800;color:var(--navy);flex:none}
.choice.sel{border-color:var(--navy2);background:#f1f5fc}.choice.sel .lt{background:var(--navy);color:#fff}
.choice.correct{border-color:var(--ok);background:#ecf8f3}.choice.correct .lt{background:var(--ok);color:#fff}.choice.wrong{border-color:var(--bad);background:#fdf0ee}.choice.wrong .lt{background:var(--bad);color:#fff}
.navgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.navgrid button{aspect-ratio:1;border:1.5px solid var(--line);background:#fff;border-radius:8px;font-weight:700;cursor:pointer;position:relative;font-family:inherit;color:var(--text)}
.navgrid button.ans{background:var(--navy);color:#fff;border-color:var(--navy)}.navgrid button.cur{outline:3px solid var(--gold);outline-offset:1px}.navgrid button.flag::after{content:'';position:absolute;top:3px;right:3px;width:8px;height:8px;border-radius:50%;background:var(--gold)}
.navgrid button.ok{background:#e3f5ee;border-color:var(--ok);color:var(--ok)}.navgrid button.no{background:#fbe9e7;border-color:var(--bad);color:var(--bad)}
.legend{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:10px}.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:4px;vertical-align:middle}
.result-hero{display:flex;gap:26px;align-items:center;flex-wrap:wrap}.verdict{font-size:22px;font-weight:800}.verdict.pass{color:var(--ok)}.verdict.fail{color:var(--bad)}
.review-item{border-left:4px solid var(--line);padding-left:14px;margin-bottom:22px}.review-item.ok{border-color:var(--ok)}.review-item.no{border-color:var(--bad)}
.explain{background:#f6f8fc;border-radius:10px;padding:10px 12px;font-size:14px;margin-top:6px}
/* checkout */
.methods{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.method{border:2px solid var(--line);border-radius:12px;padding:14px 8px;text-align:center;cursor:pointer;background:#fff;font:inherit;font-weight:700}
.method.sel{border-color:var(--navy);background:#f1f5fc}.method .logo{height:34px;display:grid;place-items:center;font-size:18px;font-weight:900;margin-bottom:4px}
.gcash{color:#0070e0}.maya{color:#00a651}.cardm{color:var(--navy)}
.demo-banner{background:repeating-linear-gradient(45deg,#fff4d6,#fff4d6 12px,#ffeab3 12px,#ffeab3 24px);border:1.5px solid #e0b43b;color:#6b4e00;font-weight:700;padding:10px 14px;border-radius:10px;text-align:center}
.price{font-size:44px;font-weight:800;color:var(--navy)}.price small{font-size:16px;color:var(--muted);font-weight:500}
/* admin */
.admin-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.admin-tabs a{padding:8px 14px;border-radius:9px;background:#fff;border:1px solid var(--line);text-decoration:none;font-weight:600;font-size:14px;color:var(--navy)}.admin-tabs a.active{background:var(--navy);color:#fff}
.choice-edit{display:flex;gap:8px;align-items:center;margin-bottom:8px}.choice-edit input[type=radio]{width:20px;height:20px;flex:none;accent-color:var(--ok)}
.qlist td:first-child{width:60px}
.toast{visibility:hidden;transition:transform .3s,visibility .3s}.toast.show{visibility:visible}
.hero .auth-card p{color:var(--muted);font-size:13px}
.dash-top{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}@media(max-width:700px){.dash-top{grid-template-columns:1fr}}
/* ===== admin / content management ===== */
.admin-tabs{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px;-webkit-overflow-scrolling:touch}.admin-tabs a{white-space:nowrap}
.tile{display:flex;gap:12px;text-decoration:none;color:inherit;transition:.15s}.tile:hover{border-color:var(--gold);transform:translateY(-1px)}.tile .ic{width:44px;height:44px;border-radius:12px;background:#fbf3d6;display:grid;place-items:center;font-size:22px;flex:none}
.modal-wrap{position:fixed;inset:0;background:rgba(11,29,54,.55);z-index:100;display:grid;place-items:center;padding:16px;animation:fade .15s}@keyframes fade{from{opacity:0}}
.modal{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);padding:22px;width:100%;max-width:520px;max-height:90vh;overflow:auto}.modal h3{margin-top:0;color:var(--navy);font-family:Merriweather,Georgia,serif}
.modal-actions{justify-content:flex-end;margin-top:16px}@media(max-width:520px){.modal-actions .btn{flex:1 1 100%}}
.radio-line{display:flex;gap:10px;align-items:center;font-weight:500;font-size:15px;margin:8px 0}.radio-line input{width:auto}
.icon-btn{border:1px solid var(--line);background:#fff;border-radius:6px;width:28px;height:22px;font-size:10px;cursor:pointer;color:var(--navy);padding:0;line-height:1}.icon-btn:disabled{opacity:.3;cursor:default}.icon-btn:not(:disabled):hover{border-color:var(--navy)}
.updown{display:flex;flex-direction:column;gap:3px;flex:none}
.danger-text{color:var(--bad)!important}.warn-text{color:var(--warn);font-weight:600}
.structure{gap:18px}.subj-head{padding-bottom:12px;border-bottom:1px solid var(--line)}
.ch-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);flex-wrap:wrap}
.ch-num{width:30px;height:30px;border-radius:50%;background:#eef2f8;color:var(--navy);font-weight:800;display:grid;place-items:center;flex:none;font-size:13px}
.ch-main{flex:1;min-width:200px}.ch-acts{display:flex;gap:6px;flex-wrap:wrap}
.add-ch{margin-top:12px;flex-wrap:nowrap}.add-ch input{padding:8px 10px}
.switch{display:inline-flex;align-items:center;gap:8px;margin:0;cursor:pointer;font-weight:600;font-size:13px;color:var(--navy);user-select:none}
.switch input{position:absolute;opacity:0;width:1px;height:1px}.switch span{width:40px;height:22px;background:#cfd6e2;border-radius:99px;position:relative;transition:.2s;flex:none}
.switch span:after{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch input:checked+span{background:var(--ok)}.switch input:checked+span:after{left:21px}.switch input:focus-visible+span{outline:3px solid rgba(27,58,102,.3)}
.switch em{font-style:normal}.switch em small{display:block;font-weight:400;color:var(--muted);font-size:12px}.switch.big span{width:48px;height:26px}.switch.big span:after{width:20px;height:20px}.switch.big input:checked+span:after{left:25px}
@media(max-width:700px){.ch-row{align-items:flex-start}.ch-main{min-width:calc(100% - 90px)}.ch-row .switch{margin-left:72px}.ch-acts{width:100%;padding-left:72px}}
.chsettings{margin-bottom:14px;align-items:flex-end}
.seg{display:flex;gap:4px;background:#e8edf5;padding:4px;border-radius:12px;margin-bottom:14px;width:fit-content;max-width:100%;overflow-x:auto}.seg a{padding:9px 16px;border-radius:9px;text-decoration:none;font-weight:600;color:var(--muted);white-space:nowrap;font-size:14px}.seg a.active{background:#fff;color:var(--navy);box-shadow:var(--shadow)}
.editor-bar{margin-bottom:10px}
.jodit-container:not(.jodit_inline){border-radius:10px!important;border-color:var(--line)!important}.jodit-toolbar__box:not(:empty){background:#f7f9fc!important;border-radius:10px 10px 0 0}
.jodit-wysiwyg{line-height:1.7}.jodit-wysiwyg table{border-collapse:collapse}.jodit-wysiwyg td,.jodit-wysiwyg th{border:1px solid #cfd6e2;padding:6px 8px}
.mat-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);align-items:start}@media(max-width:900px){.mat-grid{grid-template-columns:1fr}}
.dropzone{border:2px dashed #b9c6da;border-radius:14px;padding:28px 16px;text-align:center;cursor:pointer;background:#f8fafd;transition:.15s}.dropzone:hover,.dropzone:focus{border-color:var(--navy2);outline:none}
.dropzone.over{border-color:var(--gold);background:#fffbea;transform:scale(1.01)}.dz-ic{font-size:32px;margin-bottom:4px}
.upl{margin-top:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:#fff}.upl .progress{margin-top:6px;height:8px}.upl-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:60%}
.upl.ok{border-color:#b7e2cf}.upl.ok .upl-pct{color:var(--ok);font-weight:700}.upl.err{border-color:#f5b7b1}.upl.err .upl-pct{color:var(--bad);font-weight:600}
.mat-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}.mat-ic{font-size:24px;width:36px;text-align:center;flex:none}
.mat-main{flex:1;min-width:0}.mat-main b{display:block;overflow-wrap:anywhere}.mat-main .small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mat-acts{display:flex;gap:4px;flex:none}
.empty{padding:26px;text-align:center;color:var(--muted);border:1.5px dashed var(--line);border-radius:12px}
/* student materials */
.materials .mat{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}
.materials details.mat summary{display:flex;align-items:center;gap:10px;padding:10px 12px;cursor:pointer;list-style:none}.materials details.mat summary::-webkit-details-marker{display:none}
.materials details[open] summary .btn{background:var(--navy2)}.materials .mat-headrow{display:flex;align-items:center;gap:10px;padding:10px 12px}
.materials iframe.pdf{width:100%;height:75vh;border:0;border-top:1px solid var(--line);display:block;background:#f1f3f7}.mat-foot{padding:8px 12px;border-top:1px solid var(--line)}
.materials img{display:block;max-width:100%;max-height:520px;margin:0 auto;border-top:1px solid var(--line)}.materials video{display:block;width:100%;max-height:520px;background:#000}
.yt{position:relative;padding-top:56.25%}.yt iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.lesson img{max-width:100%;height:auto;border-radius:8px}.lesson table{border-collapse:collapse;width:100%;margin:12px 0;font-size:15px;display:block;overflow-x:auto}.lesson td,.lesson th{border:1px solid var(--line);padding:8px 10px;vertical-align:top}.lesson th,.lesson thead td{background:#f3f6fb;font-weight:700}
.lesson h2,.lesson h3{color:var(--navy);margin-top:1.2em}.lesson blockquote{border-left:4px solid var(--gold);margin:12px 0;padding:6px 14px;background:#fffbea;border-radius:0 8px 8px 0}
/* question bank */
.filters{margin-bottom:12px;padding:14px 16px}.qfilters{grid-template-columns:2fr 1.3fr 1.5fr 1fr 1fr;gap:10px;align-items:end}.qfilters label{margin-top:0}
@media(max-width:1000px){.qfilters{grid-template-columns:1fr 1fr}.qfilters .qsearch{grid-column:1/-1}}
.bulkbar{position:sticky;top:62px;z-index:12;display:flex;gap:8px;align-items:center;flex-wrap:wrap;background:var(--navy);color:#fff;padding:10px 14px;border-radius:12px;margin-bottom:12px;box-shadow:var(--shadow)}.bulkbar .btn{background:rgba(255,255,255,.14)}.bulkbar .btn.danger{background:var(--bad)}.bulkbar .btn.ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.bulkbar[hidden]{display:none}.qcount{margin-bottom:6px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.qcard{display:flex;gap:12px;align-items:flex-start;padding:12px 6px;border-bottom:1px solid var(--line);border-radius:8px}.qcard.sel{background:#f1f5fc}
.qcard>input{width:20px;height:20px;margin-top:3px;flex:none;accent-color:var(--navy)}.qmain{flex:1;min-width:0}.qt{font-weight:500;overflow-wrap:anywhere}.qacts{display:flex;gap:6px;flex:none}
@media(max-width:600px){.qcard{flex-wrap:wrap}.qmain{width:calc(100% - 40px)}.qacts{padding-left:32px}}
.choice-edit .lt{width:26px;height:26px;border-radius:7px;background:#eef2f8;display:grid;place-items:center;font-weight:800;color:var(--navy);flex:none;font-size:13px}
.use-pick{display:flex;gap:8px;flex-wrap:wrap}.radio-card{display:flex;align-items:center;gap:8px;margin:0;padding:10px 14px;border:1.5px solid var(--line);border-radius:10px;cursor:pointer;font-weight:600}.radio-card input{width:auto}
.radio-card.sel{border-color:var(--navy2);background:#f1f5fc}.radio-card.disabled{opacity:.45;cursor:not-allowed}
/* import preview */
.pv td{font-size:13.5px}.pv tr.bad{background:#fdf3f2}.pv tr.warn{background:#fffcf0}.pv .qt{font-weight:600;margin-bottom:4px;min-width:220px}
.pv-ch{display:flex;flex-wrap:wrap;gap:4px 12px;font-size:12.5px;color:var(--muted)}.pv-ch .ok{color:var(--ok);font-weight:700}.err-t{color:var(--bad)}.warn-t{color:#8a5a00}
/* staff & help */
.staff-grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);align-items:start}@media(max-width:900px){.staff-grid{grid-template-columns:1fr}}
.help{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:800px){.help{grid-template-columns:1fr}}.help h3{margin-top:0;color:var(--navy)}.help li{margin:.35em 0}.help ol,.help ul{padding-left:20px}
.help-pre{background:#f3f6fb;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:13px;white-space:pre-wrap}
@media(max-width:600px){.page-head .btn{padding:9px 12px}.container{padding:16px 12px 40px}.card{padding:16px}}
.pv .badge,.add-ch .btn,.qacts .btn,.ch-acts .btn{white-space:nowrap}
.badge{white-space:nowrap}
.materials iframe.pdf{height:min(70vh,620px)}
@media(max-width:900px){.mat-grid,.staff-grid{grid-template-columns:minmax(0,1fr)}}@media(max-width:800px){.help{grid-template-columns:minmax(0,1fr)}}
@media(max-width:600px){.g2,.g3{grid-template-columns:minmax(0,1fr)}}
/* ---------- v1.2: protection, secure viewers, offline ---------- */
.netbar{background:#3b2f06;color:#ffe9a8;text-align:center;font-size:13px;font-weight:600;padding:7px 12px}
body.tm-protect #app{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
body.tm-protect #app input,body.tm-protect #app textarea,body.tm-protect #app select{-webkit-user-select:text;user-select:text}
body.tm-protect img,body.tm-protect canvas,body.tm-protect video{-webkit-user-drag:none;user-drag:none}
body.tm-blur #app,body.tm-blur .topbar,body.tm-blur .footer{filter:blur(18px) saturate(.4);transition:filter .1s}
#tm-shield{position:fixed;inset:0;z-index:2147483600;display:grid;place-items:center;background:rgba(15,39,71,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.tm-shield-box{background:#fff;border-radius:16px;padding:26px 28px;text-align:center;max-width:340px;box-shadow:0 20px 60px rgba(0,0,0,.35);display:grid;gap:8px;justify-items:center}
.tm-shield-box p{margin:0;color:var(--muted);font-size:14px}
.print-note{display:none}
@media print{
  body.tm-protect > *:not(.print-note){display:none!important}
  body.tm-protect .print-note{display:block!important;padding:60px 30px;text-align:center;font:600 20px Inter,Arial,sans-serif;color:#0f2747}
}
.mat-body{border-top:1px solid var(--line)}
.pdfv{background:#e9edf4;position:relative}
.pdfv-bar{display:flex;align-items:center;gap:6px;padding:6px 10px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:7}
.pdfv-pages{height:min(75vh,720px);overflow:auto;padding:12px;display:grid;gap:12px;justify-items:center;align-content:start;-webkit-overflow-scrolling:touch}
.pdfv:fullscreen .pdfv-pages{height:calc(100vh - 46px)}
.pdfv-page{width:100%;background:#fff;box-shadow:0 1px 4px rgba(16,24,40,.18);min-height:60px}
.pdfv-page canvas{display:block;width:100%;height:auto}
.imgv-box{background:#f1f3f7;display:flex;justify-content:center}
.imgv{display:block;max-width:100%;height:auto;max-height:560px}
.vwrap{position:relative;background:#000}
.vwrap video{display:block;width:100%;max-height:540px;background:#000}
.vwrap:fullscreen video{max-height:100vh;height:100vh}
.vfs{position:absolute;top:8px;right:8px;z-index:8;border:0;border-radius:8px;background:rgba(0,0,0,.55);color:#fff;width:36px;height:36px;font-size:18px;cursor:pointer}
.docv{padding:14px 18px;max-height:75vh;overflow:auto;background:#fff}
.materials .yt{position:relative}
.off-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.off-row:last-child{border-bottom:0}.off-subj{padding:6px 0 10px}.off-subj + .off-subj{border-top:2px solid var(--line);padding-top:12px}
.off-prog{color:var(--navy2);font-weight:600}
.set-row{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line)}.set-row:last-child{border-bottom:0}
.set-row .set-main{flex:1;min-width:0}.set-row input[type=number]{width:90px}.set-row input[type=range]{width:160px}
@media(max-width:640px){.off-row .row{width:100%;justify-content:flex-end}.pdfv-pages{height:70vh;padding:8px}}
.linkbtn{background:none;border:0;padding:0;color:var(--navy2);text-decoration:underline;cursor:pointer;font:inherit}
.off-row .code,.off-subj .code{font-weight:800;color:var(--navy);background:#eef2f8;padding:3px 8px;border-radius:6px;font-size:12px;flex:none}

/* v1.3 store apps / account */
.footer a{color:inherit}.danger-zone{border:1px solid #f1c4c4}.danger-zone h3{color:var(--bad)}
.in-app .install-hint{display:none}
.in-app #installbtn{display:none!important}
/* v1.4 subscription plans */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.plan{position:relative;text-align:left;background:var(--card);border:2px solid var(--line);border-radius:var(--radius);padding:18px 16px 14px;cursor:pointer;box-shadow:var(--shadow);font:inherit;color:inherit;display:flex;flex-direction:column;gap:4px;transition:border-color .15s,transform .15s}
.plan:hover{border-color:var(--gold2)}.plan.sel{border-color:var(--gold);background:linear-gradient(180deg,#fffbea,#fff);transform:translateY(-2px)}
.plan.sel::after{content:"✓";position:absolute;top:12px;right:14px;width:24px;height:24px;border-radius:50%;background:var(--gold);color:var(--navy);display:grid;place-items:center;font-weight:800;font-size:13px}
.plan-name{font-weight:800;color:var(--navy);font-size:16px}.plan-price{font-size:28px;font-weight:800;color:var(--navy);line-height:1.1}.plan-price small{font-size:14px;font-weight:600;color:var(--muted)}
.plan-save{color:var(--ok);font-weight:700;font-size:13px;margin-top:2px}
.plan-badge{position:absolute;top:-11px;left:14px;background:var(--navy);color:var(--gold2);font-size:11px;font-weight:800;letter-spacing:.6px;text-transform:uppercase;padding:3px 9px;border-radius:99px}
.plan-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:12px auto 16px;max-width:460px}
.plan-mini-item{display:flex;flex-direction:column;align-items:center;gap:2px;border:1px solid var(--line);border-radius:10px;padding:10px 6px;text-decoration:none;color:var(--text);background:#fff}
.plan-mini-item:hover{border-color:var(--gold)}.plan-mini-item span{font-weight:800;font-size:18px;color:var(--navy)}.plan-mini-item small{font-size:11px;color:var(--muted)}.plan-mini-item em{font-style:normal;font-size:11px;color:var(--ok);font-weight:700}
@media(max-width:600px){.plans{grid-template-columns:1fr;gap:16px}.plan{padding:14px 14px 12px}.plan-price{font-size:24px}}