/* ==========================================================================
   GCE Learning — design system
   Idea: the exam hall. Ruled exercise-book paper, blue biro for what YOU do,
   the teacher's red pen for marks and feedback, highlighter for rewards.
   Colours are the variables just below; dark theme = [data-theme="dark"].
   ========================================================================== */
:root{
  --paper:#f3f5fa; --surface:#fff; --surface-2:#f7f9fd;
  --ink:#101a33; --ink-2:#414d68; --ink-3:#5d6985;
  --line:#dde4f2; --line-strong:#c4cfe6; --rule:#dbe5f7;
  --blue:#2346d0; --blue-ink:#1a36a3; --blue-soft:#e8edfc; --on-blue:#fff;
  --red:#c92d28; --red-soft:#fdecea;
  --mark:#ffe27a; --mark-soft:#fff6cf; --mark-ink:#5c4700;
  --green:#157a55; --green-soft:#e3f5ec;
  --r-sm:8px; --r:12px; --r-lg:18px;
  --font-display:"Bricolage Grotesque","Trebuchet MS",system-ui,sans-serif;
  --font-body:"Figtree",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --font-hand:"Caveat","Segoe Print","Bradley Hand","Comic Sans MS",cursive;
  --pop:0 14px 36px rgba(16,26,51,.18),0 2px 6px rgba(16,26,51,.08);
  --top:60px; --side:228px;
  color-scheme:light;
}
[data-theme="dark"]{
  --paper:#0b1120; --surface:#131b30; --surface-2:#19223a;
  --ink:#e8edf9; --ink-2:#b6c1da; --ink-3:#93a0bd;
  --line:#26314d; --line-strong:#34416a; --rule:#22304f;
  --blue:#86a3ff; --blue-ink:#b4c6ff; --blue-soft:#1b274d; --on-blue:#0b1120;
  --red:#ff837b; --red-soft:#3a1c22;
  --mark:#f2cf4a; --mark-soft:#3a3212; --mark-ink:#ffe27a;
  --green:#56c999; --green-soft:#12301f;
  --pop:0 14px 36px rgba(0,0,0,.55),0 2px 6px rgba(0,0,0,.4);
  color-scheme:dark;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);font-size:16px;line-height:1.55;color:var(--ink);background:var(--paper);min-height:100vh}
a{color:inherit}
img,svg{max-width:100%}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--ink-3)}
.hide{display:none!important}
h1,h2,h3{font-family:var(--font-display);letter-spacing:-.015em;line-height:1.2}
h1{font-size:clamp(1.7rem,3.2vw,2.3rem);font-weight:700}
h2{font-size:1.3rem;font-weight:700}
h3{font-size:1.05rem;font-weight:650}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.icon.sm{width:16px;height:16px}

/* ---------- shell: top bar, sidebar, content ---------- */
.topbar{height:var(--top);background:var(--surface);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;padding:0 20px;position:sticky;top:0;z-index:40}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--font-display);font-weight:700;font-size:1.12rem;letter-spacing:-.02em;white-space:nowrap}
.brand svg{width:30px;height:30px}
.menu-btn{display:none}
.searchbox{position:relative;flex:1;max-width:460px;margin-left:12px}
.searchbox .icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--ink-3);pointer-events:none}
.searchbox input{width:100%;height:40px;padding:0 40px 0 38px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2)}
.searchbox input::placeholder{color:var(--ink-3)}
.searchbox kbd{position:absolute;right:10px;top:50%;transform:translateY(-50%);font:600 12px var(--font-body);color:var(--ink-3);border:1px solid var(--line-strong);border-radius:6px;padding:0 6px;background:var(--surface)}
.top-actions{display:flex;align-items:center;gap:6px;margin-left:auto}
.iconbtn{position:relative;width:40px;height:40px;display:grid;place-items:center;border:0;background:transparent;border-radius:10px;color:var(--ink-2)}
.iconbtn:hover{background:var(--blue-soft);color:var(--blue-ink)}
.dot{position:absolute;top:3px;right:2px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--red);color:#fff;font:700 11px/18px var(--font-body);text-align:center}
.streak-chip{display:flex;align-items:center;gap:5px;height:34px;padding:0 12px;border-radius:17px;background:var(--mark-soft);color:var(--mark-ink);font-weight:700;font-size:14px;text-decoration:none;border:1px solid transparent}
.streak-chip:hover{border-color:var(--mark)}
.streak-chip .icon{width:16px;height:16px;fill:var(--mark);stroke:var(--mark-ink)}
.userchip{display:flex;align-items:center;gap:8px;padding:3px 10px 3px 3px;border-radius:22px;text-decoration:none;font-weight:600;font-size:14px;border:1px solid var(--line)}
.userchip:hover{border-color:var(--blue)}
.login-link{height:38px;padding:0 16px;display:inline-flex;align-items:center;border-radius:10px;background:var(--blue);color:var(--on-blue);font-weight:650;text-decoration:none;font-size:14px}
.avatar{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--blue-soft);font-size:18px;flex-shrink:0;line-height:1}
.avatar.sm{width:28px;height:28px;font-size:15px}
.avatar.lg{width:72px;height:72px;font-size:38px}

.body{display:flex;min-height:calc(100vh - var(--top))}
.side{width:var(--side);flex-shrink:0;background:var(--surface);border-right:1px solid var(--line);padding:14px 10px;position:sticky;top:var(--top);height:calc(100vh - var(--top));overflow-y:auto}
.nav-item{position:relative;display:flex;align-items:center;gap:12px;padding:10px 12px;margin-bottom:2px;border-radius:10px;text-decoration:none;font-weight:600;font-size:15px;color:var(--ink-2)}
.nav-item:hover{background:var(--surface-2);color:var(--ink)}
.nav-item.on{background:var(--blue-soft);color:var(--blue-ink)}
.nav-item.on::before{content:"";position:absolute;left:-10px;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;background:var(--red)}
.side hr{border:0;border-top:1px solid var(--line);margin:10px 6px}
.scrim{display:none}
.content{flex:1;min-width:0}
.container{padding:30px 36px 56px;max-width:1120px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.page-head p{color:var(--ink-3);margin-top:4px;max-width:46em}

/* ---------- controls ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:0 20px;border-radius:10px;border:1px solid var(--blue);background:var(--blue);color:var(--on-blue);font-weight:650;text-decoration:none;line-height:1.2;transition:background .15s,border-color .15s}
.btn:hover{background:var(--blue-ink);border-color:var(--blue-ink);color:#fff}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed}
.btn.outline{background:transparent;color:var(--blue-ink)}
.btn.outline:hover{background:var(--blue-soft);color:var(--blue-ink)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--ink-2)}
.btn.ghost:hover{background:var(--surface-2);color:var(--ink)}
.btn.danger{background:transparent;border-color:var(--red);color:var(--red)}
.btn.danger:hover{background:var(--red-soft);color:var(--red)}
.btn.sm{min-height:34px;padding:0 14px;font-size:14px}
.btn.lg{min-height:50px;padding:0 28px;font-size:17px}
.field{display:block;margin-bottom:16px}
.field>span{display:block;font-weight:600;font-size:14px;margin-bottom:6px}
.field small{display:block;color:var(--ink-3);margin-top:4px;font-size:13px}
.input,.textarea,.select{width:100%;min-height:44px;padding:9px 12px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);transition:border-color .15s,box-shadow .15s}
.textarea{resize:vertical}
.input:focus,.textarea:focus,.select:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 25%,transparent)}
.chip{display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 11px;border-radius:14px;background:var(--blue-soft);color:var(--blue-ink);font-weight:650;font-size:13px;white-space:nowrap}
.chip.mark{background:var(--mark-soft);color:var(--mark-ink)}
.chip.red{background:var(--red-soft);color:var(--red)}
.chip.green{background:var(--green-soft);color:var(--green)}
.chip.plain{background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line)}
.tabs{display:inline-flex;padding:3px;border-radius:12px;background:var(--surface-2);border:1px solid var(--line)}
.tabs button{border:0;background:transparent;padding:7px 16px;border-radius:9px;font-weight:600;font-size:14px;color:var(--ink-2)}
.tabs button[aria-selected="true"]{background:var(--surface);color:var(--blue-ink);box-shadow:0 1px 3px rgba(16,26,51,.12)}
.switch{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.switch:last-child{border-bottom:0}
.switch b{display:block}
.switch small{color:var(--ink-3)}
.switch input{appearance:none;flex-shrink:0;width:46px;height:26px;border-radius:13px;background:var(--line-strong);position:relative;cursor:pointer;transition:background .15s}
.switch input::after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:transform .15s}
.switch input:checked{background:var(--blue)}
.switch input:checked::after{transform:translateX(20px)}

/* ---------- surfaces ---------- */
.sheet{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px}
.sheet.flush{padding:0;overflow:hidden}
.sheet h2,.sheet h3{margin-bottom:12px}
.sheet-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.sheet-head h2,.sheet-head h3{margin:0}
.sheet-head a{font-size:14px;font-weight:600;color:var(--blue-ink)}
.ruled{background-color:var(--surface);background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 31px,var(--rule) 31px,var(--rule) 32px);background-position:0 12px;position:relative}
.ruled.margin{padding-left:76px}
.ruled.margin::before{content:"";position:absolute;left:54px;top:0;bottom:0;width:2px;background:var(--red);opacity:.45}
.list>*{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid var(--line);text-decoration:none}
.list>*:last-child{border-bottom:0}
.list>a:hover,.list>button:hover{background:var(--surface-2)}
.list .grow{flex:1;min-width:0}
.list p{color:var(--ink-3);font-size:14px}
.grow{flex:1;min-width:0}
.flex{display:flex;align-items:center;gap:12px}
.between{justify-content:space-between}
.wrap{flex-wrap:wrap}
.gap-s{gap:6px}
.mt{margin-top:16px}.mt-l{margin-top:28px}
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:18px}
.tile-ico{display:grid;place-items:center;width:46px;height:46px;border-radius:12px;background:var(--blue-soft);color:var(--blue-ink);font-size:22px;flex-shrink:0}
.notice{padding:14px 18px;border-radius:var(--r);background:var(--blue-soft);color:var(--blue-ink);margin:14px 0;border:1px solid color-mix(in srgb,var(--blue) 25%,transparent)}
.notice.error{background:var(--red-soft);color:var(--red);border-color:color-mix(in srgb,var(--red) 30%,transparent)}
.notice a{font-weight:650}
.empty{text-align:center;padding:40px 20px;color:var(--ink-2)}
.empty .tile-ico{margin:0 auto 14px;width:56px;height:56px;border-radius:50%}
.empty h3{margin-bottom:6px}
.empty p{color:var(--ink-3);max-width:32em;margin:0 auto 16px}
.skeleton{display:block;border-radius:10px;background:linear-gradient(90deg,var(--line) 25%,var(--surface-2) 50%,var(--line) 75%);background-size:200% 100%;animation:shimmer 1.3s infinite}
.skeleton.row{height:68px;margin-bottom:12px}
@keyframes shimmer{to{background-position:-200% 0}}
.bar{height:10px;border-radius:5px;background:var(--line);overflow:hidden}
.bar>i{display:block;height:100%;border-radius:5px;background:var(--blue);transition:width .5s}
.bar.mark>i{background:var(--mark);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--mark-ink) 30%,transparent)}
.bar.green>i{background:var(--green)}
.ring{--p:0;--c:var(--blue);width:108px;height:108px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--c) calc(var(--p)*1%),var(--line) 0);flex-shrink:0}
.ring>span{display:grid;place-items:center;width:82px;height:82px;border-radius:50%;background:var(--surface);font:700 22px var(--font-display);text-align:center;line-height:1.1}
.ring small{display:block;font:600 11px var(--font-body);color:var(--ink-3)}
.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.tbl th{font-size:13px;color:var(--ink-3);font-weight:600;background:var(--surface-2)}
.tbl tr:last-child td{border-bottom:0}
.ok{color:var(--green);font-weight:650}.no{color:var(--red);font-weight:650}
.xp{display:inline-flex;align-items:center;gap:4px;padding:1px 9px;border-radius:12px;background:var(--mark);color:#3d2f00;font-weight:800;font-size:13px}

/* ---------- toast + popovers ---------- */
.toasts{position:fixed;right:18px;bottom:18px;z-index:90;display:flex;flex-direction:column;gap:10px;max-width:min(380px,calc(100vw - 36px))}
.toast{display:flex;gap:12px;align-items:flex-start;padding:13px 16px;border-radius:var(--r);background:var(--ink);color:var(--paper);box-shadow:var(--pop);animation:toast-in .25s ease-out;text-decoration:none}
.toast b{display:block}
.toast span{font-size:14px;opacity:.85}
.toast .t-ico{font-size:20px;line-height:1.2}
.toast.out{opacity:0;transform:translateY(6px);transition:.25s}
@keyframes toast-in{from{opacity:0;transform:translateY(10px)}}
.pop{position:absolute;z-index:60;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--pop);overflow:hidden}
.notif-pop{right:0;top:calc(100% + 8px);width:min(380px,calc(100vw - 24px))}
.pop-head{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;border-bottom:1px solid var(--line);font-weight:700}
.pop-head button{border:0;background:none;color:var(--blue-ink);font-weight:600;font-size:13px}
.pop-foot{display:block;text-align:center;padding:12px;border-top:1px solid var(--line);font-weight:650;font-size:14px;color:var(--blue-ink);text-decoration:none}
.pop-list{max-height:min(420px,60vh);overflow-y:auto}
.notif{display:flex;gap:12px;width:100%;text-align:left;padding:12px 16px;border:0;border-bottom:1px solid var(--line);background:transparent;position:relative}
.notif:hover{background:var(--surface-2)}
.notif.unread{background:color-mix(in srgb,var(--blue) 7%,var(--surface))}
.notif.unread::before{content:"";position:absolute;left:5px;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--red)}
.notif .n-ico{font-size:20px;width:30px;text-align:center;flex-shrink:0}
.notif b{display:block;font-size:14px;line-height:1.35}
.notif span{display:block;font-size:13px;color:var(--ink-3)}
.notif time{font-size:12px;color:var(--ink-3)}
.search-pop{left:0;right:0;top:calc(100% + 6px);max-height:70vh;overflow-y:auto}
.hit{display:flex;gap:12px;align-items:center;padding:10px 14px;text-decoration:none;border-bottom:1px solid var(--line)}
.hit:last-child{border-bottom:0}
.hit:hover,.hit.sel{background:var(--blue-soft)}
.hit small{display:block;color:var(--ink-3)}
.hit-group{padding:8px 14px 4px;font-size:13px;font-weight:700;color:var(--ink-3);background:var(--surface-2)}

/* ---------- home ---------- */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:30px 0 22px}
.hero h1{font-size:clamp(2.3rem,5vw,3.6rem);line-height:1.04;letter-spacing:-.03em;margin-bottom:16px}
.hero p.lead{font-size:1.15rem;color:var(--ink-2);max-width:30em;margin-bottom:26px}
.script-card{transform:rotate(1.8deg);border:1px solid var(--line-strong);border-radius:6px;padding:22px 22px 22px 70px;box-shadow:0 18px 40px rgba(16,26,51,.12);font-size:15px;min-height:290px}
.script-card.ruled.margin::before{left:48px}
.script-card h4{font:700 15px var(--font-display);margin-bottom:10px}
.script-card .q{line-height:32px}
.omr{display:flex;gap:10px;margin:8px 0 12px}
.bub{display:inline-grid;place-items:center;width:30px;height:30px;border:2px solid var(--ink-3);border-radius:50%;font:700 13px var(--font-body);color:var(--ink-2);flex-shrink:0;background:var(--surface)}
.bub.on{background:var(--ink);border-color:var(--ink);color:var(--surface)}
.pen{font-family:var(--font-hand);color:var(--red);font-weight:700}
.script-card .pen.score{position:absolute;right:26px;bottom:48px;font-size:66px;line-height:1;transform:rotate(-7deg)}
.script-card .pen.score svg{position:absolute;left:-14px;top:-8px;width:calc(100% + 28px);height:calc(100% + 18px);overflow:visible}
.script-card .pen.note{position:absolute;left:76px;bottom:14px;font-size:28px;transform:rotate(-2deg)}
.features{margin-top:26px}
.features>a{padding:20px 22px;gap:18px}
.features h3{margin-bottom:2px}
.features .grid{display:grid;grid-template-columns:1fr 1fr}
.features .grid>a{border-right:1px solid var(--line)}
.features .grid>a:nth-child(2n){border-right:0}
.features .grid>a:nth-last-child(-n+2){border-bottom:0}
.greet h1{margin-bottom:4px}
.today{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:22px}
.c-7{grid-column:span 7}.c-5{grid-column:span 5}.c-12{grid-column:span 12}
.daily-card{display:flex;gap:22px;align-items:center}
.daily-card .ruled{border:1px solid var(--line-strong);border-radius:6px;padding:10px 14px;min-width:150px;text-align:center}
.daily-card .ruled .pen{font-size:34px;line-height:1.1}
.week{display:flex;align-items:flex-end;gap:10px;height:130px;padding-top:6px}
.week div{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px;height:100%;font-size:12px;color:var(--ink-3)}
.week i{display:block;width:100%;max-width:34px;border-radius:6px 6px 2px 2px;background:var(--blue);min-height:4px}
.week div.zero i{background:var(--line)}
.week div.today-col i{background:var(--red)}
.week b{font-size:12px;color:var(--ink-2)}
.lb-mini li{list-style:none;display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid var(--line)}
.lb-mini li:last-child{border-bottom:0}
.lb-mini .rank{width:22px;font:700 15px var(--font-display);color:var(--ink-3)}
.lb-mini li.me{font-weight:700}

/* ---------- past papers ---------- */
.filters{margin-bottom:16px}
.filters .input{max-width:360px}
.paper-year{font:700 14px var(--font-display);color:var(--ink-3);margin:24px 0 8px}
.done-tick{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--green-soft);color:var(--green)}
.q-article{position:relative;margin-bottom:16px;padding:22px 24px 20px 84px;border:1px solid var(--line);border-radius:var(--r-lg);scroll-margin-top:84px}
.q-article .num{position:absolute;left:14px;top:18px;width:40px;text-align:center;font:700 13px var(--font-display);color:var(--ink-3)}
.q-article.flash{animation:flash 2.2s ease-out}
@keyframes flash{0%,30%{box-shadow:0 0 0 4px var(--mark)}100%{box-shadow:0 0 0 4px transparent}}
.q-article .prompt{font-size:1.08rem;line-height:32px;margin-bottom:10px}
.q-tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.solution{margin-top:14px;padding:14px 16px;border-radius:var(--r);background:var(--mark-soft);border-left:4px solid var(--mark);color:var(--ink);line-height:1.6}
.save-btn[aria-pressed="true"]{color:var(--red);border-color:var(--red)}
.save-btn[aria-pressed="true"] .icon{fill:var(--red)}
.sticky-foot{position:sticky;bottom:0;margin-top:22px;padding:14px 0;background:linear-gradient(to top,var(--paper) 70%,transparent)}

/* ---------- quiz ---------- */
.picker{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.pick{display:flex;flex-direction:column;gap:10px;padding:18px;text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg)}
.pick:hover{border-color:var(--blue)}
.pick .top{display:flex;align-items:center;gap:12px}
.pick small{color:var(--ink-3)}
.quiz-bar{display:flex;align-items:center;gap:16px;margin-bottom:14px;flex-wrap:wrap}
.quiz-bar .bar{flex:1;min-width:140px}
.timer{font:700 15px var(--font-display);font-variant-numeric:tabular-nums;display:inline-flex;gap:6px;align-items:center;color:var(--ink-2)}
.qcard{padding:28px 28px 26px 84px;border:1px solid var(--line-strong);border-radius:8px;min-height:340px}
.qcard.ruled.margin::before{left:60px}
.qcard .tag{display:inline-flex;gap:6px;align-items:center;margin-bottom:10px;font-size:13px;font-weight:650;color:var(--ink-3)}
.qcard h2{font:600 1.25rem/32px var(--font-body);letter-spacing:0;margin-bottom:14px}
.opts{display:grid;gap:10px}
.opt{display:flex;align-items:center;gap:14px;padding:10px 14px;border:1.5px solid var(--line-strong);border-radius:12px;background:var(--surface);cursor:pointer;transition:border-color .12s,background .12s}
.opt:hover{border-color:var(--blue)}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt:has(input:checked){border-color:var(--blue);background:var(--blue-soft)}
.opt:has(input:checked) .bub{background:var(--blue);border-color:var(--blue);color:var(--on-blue)}
.opt:has(input:focus-visible){outline:3px solid var(--blue);outline-offset:2px}
.qnav{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0}
.qnav button{width:36px;height:36px;border-radius:8px;border:1.5px solid var(--line-strong);background:var(--surface);font-weight:700;font-size:14px;color:var(--ink-2)}
.qnav button.answered{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-ink)}
.qnav button.cur{outline:3px solid var(--blue);outline-offset:1px}
.quiz-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.confirm{padding:14px 18px;border-radius:var(--r);background:var(--mark-soft);color:var(--mark-ink);margin-top:14px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:space-between}
.script{border:1px solid var(--line-strong);border-radius:8px;padding:30px 30px 34px 84px;min-height:280px}
.script.ruled.margin::before{left:60px}
.script h1{font-size:1.5rem;margin-bottom:4px}
.marks{position:relative;display:flex;align-items:center;gap:30px;flex-wrap:wrap;margin:14px 0 6px}
.score-mark{position:relative;font:700 92px/1 var(--font-hand);color:var(--red);transform:rotate(-5deg);padding:10px 26px;display:inline-block}
.score-mark svg{position:absolute;inset:-4px -6px;width:calc(100% + 12px);height:calc(100% + 8px);overflow:visible}
.score-mark path{fill:none;stroke:var(--red);stroke-width:4;stroke-linecap:round;stroke-dasharray:420;stroke-dashoffset:420;animation:draw .9s .15s ease-out forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.verdict{font:700 38px/1.1 var(--font-hand);color:var(--red);transform:rotate(-2deg)}
.gains{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 0}
.unlock{display:flex;gap:12px;align-items:center;padding:12px 16px;margin-top:12px;border:1.5px dashed var(--mark-ink);border-radius:var(--r);background:var(--mark-soft);color:var(--mark-ink)}
.unlock .big{font-size:28px}
.review{margin-top:22px}
.rv{position:relative;padding:14px 16px 14px 60px;border-bottom:1px dashed var(--line-strong)}
.rv:last-child{border-bottom:0}
.rv .pen{position:absolute;left:14px;top:4px;font-size:34px}
.rv h3{font:600 1rem/1.5 var(--font-body);margin-bottom:6px}
.rv .ans{font-size:15px;color:var(--ink-2)}
.rv .ans s{color:var(--red);text-decoration-thickness:2px}
.rv .ans b{color:var(--green)}
.rv .why{margin-top:6px;font-size:14px;color:var(--ink-3)}
.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

/* ---------- chat ---------- */
.chat-shell{display:grid;grid-template-columns:220px 1fr;gap:16px;height:calc(100dvh - var(--top) - 150px);min-height:480px}
.rooms{overflow-y:auto;padding:8px}
.room{display:flex;align-items:center;gap:10px;width:100%;text-align:left;padding:9px 10px;border:0;background:none;border-radius:10px;font-weight:600;color:var(--ink-2)}
.room:hover{background:var(--surface-2)}
.room[aria-current="true"]{background:var(--blue-soft);color:var(--blue-ink)}
.room .ri{width:26px;text-align:center}
.room .on{margin-left:auto;font-size:12px;font-weight:700;color:var(--green)}
.chat-main{display:flex;flex-direction:column;min-width:0;padding:0;overflow:hidden}
.chat-top{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;border-bottom:1px solid var(--line)}
.status{font-size:13px;color:var(--ink-3)}
.status.live::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:6px}
.messages{position:relative;flex:1;overflow-y:auto;padding:14px 18px;scroll-behavior:smooth}
.day{text-align:center;margin:14px 0 8px;font-size:12px;font-weight:700;color:var(--ink-3)}
.day span{background:var(--surface-2);padding:2px 12px;border-radius:12px;border:1px solid var(--line)}
.msg{display:flex;gap:10px;margin-bottom:12px;max-width:min(680px,92%);position:relative}
.msg.mine{margin-left:auto;flex-direction:row-reverse}
.bubble{min-width:0;padding:8px 12px;border-radius:14px 14px 14px 4px;background:var(--surface-2);border:1px solid var(--line)}
.msg.mine .bubble{background:var(--blue-soft);border-color:color-mix(in srgb,var(--blue) 25%,transparent);border-radius:14px 14px 4px 14px}
.msg.tagged .bubble{box-shadow:0 0 0 2px var(--mark)}
.meta{display:flex;gap:8px;align-items:baseline;font-size:12px;color:var(--ink-3)}
.meta strong{color:var(--ink);font-size:13px}
.text{white-space:pre-wrap;overflow-wrap:anywhere}
.text a{color:var(--blue-ink);text-decoration:underline}
.men{background:var(--blue-soft);color:var(--blue-ink);border-radius:5px;padding:0 4px;font-weight:650}
.men.me{background:var(--mark);color:#3d2f00}
.edited{font-size:11px;color:var(--ink-3)}
.quote{border-left:3px solid var(--line-strong);padding:2px 10px;margin-bottom:6px;font-size:13px;color:var(--ink-3)}
.quote b{color:var(--ink-2)}
.reacts{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.react{display:inline-flex;gap:5px;align-items:center;height:26px;padding:0 9px;border-radius:13px;border:1px solid var(--line-strong);background:var(--surface);font-size:13px}
.react.mine{background:var(--blue-soft);border-color:var(--blue)}
.tools{position:absolute;top:-14px;right:8px;display:none;gap:2px;padding:3px;border-radius:10px;background:var(--surface);border:1px solid var(--line);box-shadow:0 4px 14px rgba(16,26,51,.14);z-index:5}
.msg.mine .tools{right:auto;left:8px}
.msg:hover .tools,.msg:focus-within .tools{display:flex}
@media(hover:none){.tools{display:flex;position:static;box-shadow:none;border:0;background:transparent;padding:0;margin-top:4px}}
.tools button{width:30px;height:28px;border:0;background:transparent;border-radius:7px;color:var(--ink-2);display:grid;place-items:center;font-size:15px}
.tools button:hover{background:var(--blue-soft)}
.emoji-row{display:none;gap:2px}.emoji-row.open{display:flex}
.composer{border-top:1px solid var(--line);padding:10px 14px 12px}
.replying{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:6px 10px;margin-bottom:8px;border-left:3px solid var(--blue);background:var(--blue-soft);border-radius:0 8px 8px 0;font-size:13px}
.composer-row{display:flex;gap:10px;align-items:flex-end}
.composer textarea{flex:1;height:46px;max-height:140px;resize:none}
.typing{min-height:20px;padding:0 4px 4px;font-size:13px;color:var(--ink-3)}
.hint{display:flex;justify-content:space-between;font-size:12px;color:var(--ink-3);margin-top:4px}
.hint .err{color:var(--red)}
.jump{position:sticky;bottom:8px;margin:0 auto;display:none;width:max-content;box-shadow:var(--pop)}
.jump.show{display:flex}
.load-more{display:block;margin:0 auto 12px}

/* ---------- progress, badges, leaderboard ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:18px}
.stat{padding:16px 18px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.stat b{display:block;font:700 1.9rem/1.1 var(--font-display)}
.stat span{color:var(--ink-3);font-size:14px}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.badge{padding:16px 12px;text-align:center;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.badge .bi{font-size:34px;display:block;margin-bottom:6px}
.badge b{display:block;font-size:14px}
.badge small{color:var(--ink-3);font-size:12.5px;line-height:1.35;display:block}
.badge.locked{background:var(--surface-2);border-style:dashed}
.badge.locked .bi{filter:grayscale(1);opacity:.35}
.badge.locked b{color:var(--ink-3)}
.mastery .m{padding:10px 0;border-bottom:1px solid var(--line)}
.mastery .m:last-child{border-bottom:0}
.mastery .bar{margin-top:6px;height:8px}
.lb{list-style:none}
.lb li{display:flex;align-items:center;gap:14px;padding:12px 18px;border-bottom:1px solid var(--line)}
.lb li:last-child{border-bottom:0}
.lb li.me{background:var(--mark-soft)}
.lb .rank{width:34px;font:700 1.15rem var(--font-display);color:var(--ink-3);text-align:center}
.lb li:nth-child(1) .rank{color:#b8860b}.lb li:nth-child(2) .rank{color:#7d8797}.lb li:nth-child(3) .rank{color:#a0642c}

/* ---------- auth + profile ---------- */
.auth-wrap{max-width:440px;margin:14px auto 0}
.auth-wrap .tabs{display:flex;margin-bottom:18px}
.auth-wrap .tabs button{flex:1}
.avatars{display:grid;grid-template-columns:repeat(8,1fr);gap:8px}
.avatars button{aspect-ratio:1;font-size:24px;border-radius:12px;border:2px solid transparent;background:var(--surface-2)}
.avatars button[aria-pressed="true"]{border-color:var(--blue);background:var(--blue-soft)}
.stepper{display:inline-flex;align-items:center;gap:12px}
.stepper button{width:40px;height:40px;border-radius:10px;border:1px solid var(--line-strong);background:var(--surface);font:700 20px var(--font-body)}
.stepper output{min-width:34px;text-align:center;font:700 1.3rem var(--font-display)}
.profile-head{display:flex;gap:18px;align-items:center;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media(max-width:1000px){
  .c-7,.c-5{grid-column:span 12}
  .hero{grid-template-columns:1fr}
  .script-card{max-width:440px}
  .features .grid{grid-template-columns:1fr}
  .features .grid>a{border-right:0}
  .features .grid>a:nth-last-child(2){border-bottom:1px solid var(--line)}
}
@media(max-width:860px){
  .menu-btn{display:grid}
  .side{position:fixed;left:0;top:var(--top);bottom:0;height:auto;z-index:50;transform:translateX(-102%);transition:transform .2s;box-shadow:var(--pop);width:min(280px,82vw)}
  body.nav-open .side{transform:none}
  body.nav-open .scrim{display:block;position:fixed;inset:var(--top) 0 0 0;background:rgba(10,16,32,.5);z-index:45}
  .nav-item.on::before{left:-10px}
  .container{padding:22px 16px 48px}
  .topbar{padding:0 10px;gap:6px}
  .brand span{display:none}
  .searchbox{margin-left:0}
  .searchbox kbd{display:none}
  .userchip span.nm{display:none}
  .userchip{padding:3px}
  .chat-shell{grid-template-columns:1fr;height:calc(100dvh - var(--top) - 130px)}
  .rooms{display:flex;overflow-x:auto;padding:6px}
  .room{width:auto;white-space:nowrap}
  .room .on{display:none}
  .qcard,.script,.q-article{padding-left:58px;padding-right:16px}
  .qcard.ruled.margin::before,.script.ruled.margin::before{left:40px}
  .q-article .num{left:4px}
  .ruled.margin{padding-left:58px}
  .score-mark{font-size:72px}
  .daily-card{flex-direction:column;align-items:flex-start}
  .avatars{grid-template-columns:repeat(4,1fr)}
  .toasts{left:12px;right:12px;bottom:12px;max-width:none}
}
@media(max-width:520px){
  .streak-chip span{display:none}
  .streak-chip{padding:0 9px}
  .top-actions{gap:2px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .score-mark path{stroke-dashoffset:0}
}
@media print{.topbar,.side,.toasts{display:none}.container{padding:0}}