/* student portal and admin dashboard */
.portal{background:radial-gradient(60% 50% at 80% 0%,rgba(79,172,254,.1),transparent 65%),radial-gradient(40% 40% at 0% 100%,rgba(0,242,254,.05),transparent 65%),var(--obs);min-height:70vh}
.p-card{max-width:440px;margin:0 auto;display:flex;flex-direction:column;gap:18px;padding:32px 24px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--glass-b);-webkit-backdrop-filter:blur(var(--blur));backdrop-filter:blur(var(--blur))}
.p-card .logo{width:72px;height:72px;margin:0 auto;border-radius:50%}
.p-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.linkbtn{border:0;background:none;color:var(--cyan);font-weight:600;cursor:pointer;padding:0;min-height:44px;text-align:left}
.nlist{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.nrow{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.nrow-t{display:flex;flex-direction:column;gap:2px;min-width:0}
.nrow-t b{overflow-wrap:anywhere;font-weight:600}
.libsec{display:flex;flex-direction:column;gap:10px;margin-top:28px}
.atabs{display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--line);padding-bottom:12px}
.atabs button{min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--glass-b);background:var(--glass);color:var(--plat-2);font-weight:600;cursor:pointer;transition:color var(--t),border-color var(--t)}
.atabs button:hover{color:var(--plat);border-color:var(--glass-b2)}
.atabs button[aria-selected="true"]{background:var(--cyan);color:var(--on-accent);border-color:var(--cyan)}
.apanel{display:flex;flex-direction:column;gap:24px;padding-top:24px}
.abox{display:flex;flex-direction:column;gap:14px;padding:24px;border-radius:var(--r);background:var(--glass);border:1px solid var(--glass-b);min-width:0}
.abox h2{font-size:20px;font-weight:650;letter-spacing:-.015em}
.srow{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;padding:12px 14px;border:1px solid var(--glass-b);border-radius:14px;background:rgba(255,255,255,.03);color:var(--plat);cursor:pointer;text-align:left;transition:border-color var(--t),box-shadow var(--t)}
.srow:hover,.srow.on{border-color:var(--cyan)}
.srow.on{box-shadow:inset 0 0 0 1px var(--cyan),var(--glow)}
.srow-t{display:flex;flex-direction:column;min-width:0}
.srow-t .small{overflow-wrap:anywhere}
.srow-r{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex:none}
.st-active{background:rgba(0,242,254,.1);color:var(--cyan);border-color:rgba(0,242,254,.3)}
.st-pending{background:rgba(79,172,254,.1);color:var(--indigo);border-color:rgba(79,172,254,.32)}
.st-suspended{background:var(--glass);color:var(--plat-2);border-color:var(--glass-b2)}
.slist{display:flex;flex-direction:column;gap:8px;max-height:560px;overflow-y:auto}
.catset{border:1px solid var(--glass-b);border-radius:12px;padding:12px 14px;display:flex;flex-direction:column;gap:4px;margin:0}
.catset legend{font-weight:600;font-size:14px;padding:0 6px;color:var(--plat-2)}
.chk{display:flex;align-items:center;gap:10px;min-height:36px;font-size:15px}
.chk input{width:20px;height:20px;accent-color:var(--cyan);flex:none}
.chk.dim{opacity:.45}
.notes-pick{max-height:260px;overflow-y:auto;border:1px solid var(--glass-b);border-radius:12px;padding:8px 12px}
.arow{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}
.arow-t{display:flex;flex-direction:column;min-width:0;flex:1 1 220px}
.arow-t .small{overflow-wrap:anywhere}
.arow input,.arow select{font:inherit;font-size:15px;min-height:40px;padding:0 10px;border:1px solid var(--field);border-radius:10px;background:rgba(255,255,255,.04);color:var(--plat);min-width:0}
.arow select option{background:var(--obs-3)}
.arow input:not(.sortin){flex:1 1 180px}
.sortin{width:72px}
.danger{color:var(--plat-2)!important;border-color:var(--glass-b2)!important}
.danger:hover{color:var(--plat)!important;border-color:var(--plat)!important;box-shadow:none!important}
.adgrid{display:grid;gap:20px}
@media (min-width:900px){
  .p-card{padding:40px}
  .adgrid{grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:start}
}

/* tab player */
.tbar{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;position:relative}
.tsel{position:relative}
.tplay{min-width:96px}
.tog{min-height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--field);background:rgba(255,255,255,.03);color:var(--plat);font:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:border-color var(--t),background var(--t),box-shadow var(--t)}
.tog:hover{border-color:var(--cyan)}
.tog[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:var(--on-accent)}
.tsel select{font:inherit;font-size:15px;min-height:40px;padding:0 10px;border:1px solid var(--field);border-radius:10px;background:rgba(255,255,255,.04);color:var(--plat);max-width:200px}
.tsel select option{background:var(--obs-3)}
.mono{font-variant-numeric:tabular-nums;min-width:86px}
/* the sheet itself stays on a paper-white surface: notation is far easier to read dark-on-light */
.tscroll{height:min(68svh,760px);overflow:auto;-webkit-overflow-scrolling:touch;background:#F8F9FA;border:1px solid var(--glass-b);border-radius:var(--r);position:relative;color:#0D0F12}
#tab-surface{min-height:300px}
.tabpage .at-cursor-bar{background:rgba(0,242,254,.14)}
.tabpage .at-cursor-beat{background:#00A9B6;width:3px}
.tabpage .at-highlight *{fill:#008A96;stroke:#008A96}
.tabpage .at-selection div{background:rgba(79,172,254,.2)}
@media (max-width:640px){.tip{display:none}.tscroll{height:62svh}}
.seg button:disabled{opacity:.4;cursor:not-allowed}
.tbar .seg button{white-space:nowrap}
@media (max-width:640px){
  .tabpage.sec{padding-top:20px}
  .tabpage .p-head .h3{font-size:20px}
  #tab-root,#tab-player{min-width:0;max-width:100%}
  .tbar{flex-wrap:nowrap;overflow-x:auto;max-width:100%;min-width:0;-webkit-overflow-scrolling:touch;padding-bottom:4px;scrollbar-width:none}
  .tbar::-webkit-scrollbar{display:none}
  .tbar>*{flex:none}
  .tog,.tbar .btn-sm,.tsel select{min-height:38px;font-size:13px}
  .tplay{min-width:80px;min-height:42px}
  .tbar .seg button{min-height:34px;padding:0 12px;font-size:13px}
}

/* tab player: full screen (real full screen, or a full-window view on iPhone) */
html.tab-full,html.tab-full body{overflow:hidden}
.tab-full #tab-player,#tab-player:fullscreen{position:fixed;inset:0;z-index:300;margin:0;background:var(--obs);display:flex;flex-direction:column;gap:8px;padding:max(10px,env(safe-area-inset-top,0px)) max(12px,env(safe-area-inset-right,0px)) max(10px,env(safe-area-inset-bottom,0px)) max(12px,env(safe-area-inset-left,0px));overscroll-behavior:contain}
#tab-player:-webkit-full-screen{position:fixed;inset:0;z-index:300;background:var(--obs);display:flex;flex-direction:column;gap:8px;padding:10px 12px}
.tab-full #tab-player .tscroll,#tab-player:fullscreen .tscroll{flex:1 1 auto;height:auto;min-height:0}
.tab-full #tab-player .tip,.tab-full #tab-status:empty{display:none}
#tab-fs[aria-pressed="true"]{border-color:var(--cyan);color:var(--cyan)}
.tab-full #tab-player>:not(.tscroll),#tab-player:fullscreen>:not(.tscroll){flex:none}

/* loop bar pickers */
.tloop{display:inline-flex;align-items:center;gap:6px;flex:none}
.tloop .tsel{display:inline-flex;align-items:center;gap:4px}
.tlab{font-size:13px;color:var(--plat-3)}
.tloop select{min-width:58px}
.tab-full .tbar,#tab-player:fullscreen .tbar{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:2px}
.tab-full .tbar::-webkit-scrollbar{display:none}
.tab-full .tbar>*,#tab-player:fullscreen .tbar>*{flex:none}

/* admin: store products */
.prow{display:grid;grid-template-columns:72px minmax(0,1fr);gap:12px 14px;padding:16px 0;border-bottom:1px solid var(--line)}
.pthumb{width:72px;height:72px;border-radius:12px;overflow:hidden;background:#F8F9FA;display:flex;align-items:center;justify-content:center;text-align:center}
.pthumb img{width:100%;height:100%;object-fit:contain}
.pthumb .small{color:#5C6470;font-size:11px}
.pfields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 10px;min-width:0}
.pf{display:flex;flex-direction:column;gap:3px;min-width:0}
.pf input,.pf textarea{font:inherit;font-size:15px;min-height:40px;padding:6px 10px;border:1px solid var(--field);border-radius:10px;background:rgba(255,255,255,.04);color:var(--plat);min-width:0;width:100%}
.pf input[type=checkbox]{width:20px;min-height:0}
.pf textarea{resize:vertical}
.pwide,.pact{grid-column:1/-1}
@media (min-width:900px){.prow{grid-template-columns:88px minmax(0,1fr)}.pthumb{width:88px;height:88px}.pfields{grid-template-columns:2fr 1.4fr 1fr 1fr .6fr}}

/* admin: exams */
.ex-h{margin-top:18px}
.qed{display:flex;flex-direction:column;gap:8px;padding:14px;border:1px solid var(--glass-b);border-radius:14px;background:rgba(255,255,255,.02)}
.qed select,.qed textarea,.qed input:not([type=radio]){font:inherit;font-size:15px;min-height:40px;padding:6px 10px;border:1px solid var(--field);border-radius:10px;background:rgba(255,255,255,.04);color:var(--plat);min-width:0}
.qed textarea{width:100%;resize:vertical}
.qed select option{background:var(--obs-3)}
.qnum{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--cyan);color:var(--on-accent);font-size:14px}
.qopt{display:flex;align-items:center;gap:10px}
.qopt input[type=radio]{width:20px;height:20px;accent-color:var(--cyan);flex:none}
.qopt input:not([type=radio]){flex:1}
.marks .arow input{width:72px}
.rp-body{white-space:pre-wrap;margin-top:6px}
#ex-edit{gap:12px}

/* student: exams and progress */
.ex-cta{display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:16px;color:var(--plat);text-decoration:none;border-color:rgba(0,242,254,.35);background:linear-gradient(135deg,rgba(0,242,254,.10),rgba(79,172,254,.04))}
.ex-cta:hover{border-color:var(--cyan);box-shadow:var(--glow)}
.ex-cta-go{font-size:26px;color:var(--cyan);flex:none}
.lvl{display:flex;flex-direction:column;gap:20px;background:linear-gradient(160deg,rgba(0,242,254,.08),rgba(13,15,18,0) 60%),var(--glass)}
.lvl-top{display:flex;align-items:center;gap:18px}
.lvl-badge{position:relative;width:88px;height:88px;flex:none}
.lvl-badge svg{width:100%;height:100%;transform:rotate(-90deg)}
.lvl-badge circle{fill:none;stroke-width:7}
.lvl-tr{stroke:rgba(255,255,255,.08)}
.lvl-ar{stroke:var(--cyan);stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;transition:stroke-dashoffset 1.2s var(--ease-out);filter:drop-shadow(0 0 6px rgba(0,242,254,.6))}
.lvl-badge b{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:30px;color:var(--plat)}
.lvl-bar{height:10px;border-radius:99px;background:rgba(255,255,255,.07);overflow:hidden}
.lvl-bar i{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--indigo),var(--cyan));transition:width 1.2s var(--ease-out)}
.lvl-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.lvl-stat{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 6px;border:1px solid var(--glass-b);border-radius:14px;background:rgba(255,255,255,.02)}
.lvl-stat b{font-size:22px;color:var(--cyan)}
.lvl-stat span{font-size:12px;color:var(--plat-2);text-transform:uppercase;letter-spacing:.08em}
.trend{display:flex;align-items:flex-end;gap:10px;height:170px;margin-top:10px;overflow-x:auto;padding-bottom:4px}
.tr-col{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1 0 56px;max-width:90px;height:100%}
.tr-bar{flex:1;width:70%;display:flex;align-items:flex-end;border-radius:8px;background:rgba(255,255,255,.04)}
.tr-bar i{display:block;width:100%;border-radius:8px;background:linear-gradient(0deg,var(--indigo),var(--cyan))}
.tr-v{font-size:13px;font-weight:700;color:var(--plat)}
.tr-l{font-size:11px;color:var(--plat-2);text-align:center;line-height:1.2;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;margin-top:10px}
.bdg{display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px dashed var(--glass-b);border-radius:14px;opacity:.55}
.bdg.got{opacity:1;border-style:solid;border-color:rgba(0,242,254,.4);background:rgba(0,242,254,.06)}
.bdg-i{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;flex:none;font-size:18px;background:rgba(255,255,255,.06);color:var(--plat-2)}
.bdg.got .bdg-i{background:var(--cyan);color:var(--on-accent);box-shadow:0 0 18px rgba(0,242,254,.45)}
.bdg-t{display:flex;flex-direction:column;min-width:0}
.bdg-t span{font-size:13px;color:var(--plat-2)}
.ex-card{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px}
.ex-paper{display:flex;flex-direction:column;gap:18px}
.xq{border:1px solid var(--glass-b);border-radius:16px;padding:14px 16px 16px;margin:0;display:flex;flex-direction:column;gap:8px;min-width:0}
.xq legend{display:flex;align-items:flex-start;gap:10px;padding:0;margin-bottom:6px;float:left;width:100%}
.xq legend+*{clear:both}
.xq-p{flex:1;font-weight:600;line-height:1.4;padding-top:4px}
.xq-m{font-size:12px;color:var(--plat-2);white-space:nowrap;padding-top:6px}
.xq-perf{flex-direction:row;align-items:center;border-style:dashed}
.xo{display:flex;align-items:center;gap:12px;min-height:48px;padding:8px 12px;border:1px solid var(--glass-b);border-radius:12px;cursor:pointer;transition:border-color var(--t),background var(--t)}
.xo:hover{border-color:rgba(0,242,254,.5)}
.xo:has(input:checked){border-color:var(--cyan);background:rgba(0,242,254,.08)}
.xo input{width:20px;height:20px;accent-color:var(--cyan);flex:none}
.xo-k{font-size:12px;font-weight:700;color:var(--plat-2)}
.xs{font:inherit;font-size:16px;min-height:48px;padding:0 14px;border:1px solid var(--field);border-radius:12px;background:rgba(255,255,255,.04);color:var(--plat);width:100%}
.xs:focus{outline:2px solid var(--cyan);outline-offset:1px}
.res{display:flex;flex-direction:column;gap:12px}
.res-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.res-pct{font-size:32px;color:var(--cyan);line-height:1}
.res-rows{display:grid;gap:6px}
.res-row{display:flex;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.res-row.pend b{color:var(--indigo);font-weight:600}
.res-q summary{cursor:pointer;color:var(--cyan);font-weight:600;min-height:40px;display:flex;align-items:center}
.res-qi{display:flex;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.res-mk{flex:none;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.res-qi.ok .res-mk{background:var(--cyan);color:var(--on-accent)}
.res-qi.no .res-mk{background:rgba(255,255,255,.08);color:var(--plat-2)}
.rep{display:flex;flex-direction:column;gap:6px;border-left:3px solid var(--cyan)}
.rep-body{white-space:pre-wrap}
@media (max-width:560px){.lvl-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.lvl-badge{width:72px;height:72px}.lvl-badge b{font-size:24px}.xq-perf{flex-direction:column;align-items:flex-start}}
@media (prefers-reduced-motion:reduce){.lvl-ar,.lvl-bar i{transition:none}}