*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #060810;--bg1: #0a0c18;--bg2: #0f1222;--s1: rgba(255, 255, 255, .04);--s2: rgba(255, 255, 255, .07);--s3: rgba(255, 255, 255, .11);--b1: rgba(255, 255, 255, .07);--b2: rgba(255, 255, 255, .13);--b3: rgba(255, 255, 255, .22);--accent1: #7c3aed;--accent1-hi: #a78bfa;--accent1-gl: rgba(124, 58, 237, .3);--accent1-bg: rgba(124, 58, 237, .09);--accent1-bd: rgba(124, 58, 237, .4);--accent2: #4f46e5;--accent2-hi: #818cf8;--accent2-gl: rgba(79, 70, 229, .3);--violet: var(--accent1);--violet-hi: var(--accent1-hi);--violet-gl: var(--accent1-gl);--indigo: var(--accent2);--blue: #3b82f6;--blue-gl: rgba(59, 130, 246, .25);--math-c: #60a5fa;--math-gl: rgba(96, 165, 250, .2);--phys-c: #f87171;--phys-gl: rgba(248, 113, 113, .2);--chem-c: #4ade80;--chem-gl: rgba(74, 222, 128, .2);--green: #22c55e;--green-bg: rgba(34, 197, 94, .08);--green-bd: rgba(34, 197, 94, .35);--red: #ef4444;--red-bg: rgba(239, 68, 68, .08);--red-bd: rgba(239, 68, 68, .35);--amber: #f59e0b;--t1: rgba(255, 255, 255, .92);--t2: rgba(255, 255, 255, .55);--t3: rgba(220, 220, 220, .574);--gradient-start: #a78bfa;--gradient-end: #3b82f6;--navbar-bg: rgba(12, 10, 26, .72);--navbar-border: rgba(255, 255, 255, .07);--modal-bg: rgba(10, 12, 24, .97);--panel-bg: rgba(10, 12, 24, .98);--drawer-bg: #0a0c18;--topbar-bg: rgba(6, 8, 16, .85);--sidebar-bg: rgba(6, 8, 16, .6);--header-bg: rgba(20, 20, 30, .55);--header-border: rgba(255, 255, 255, .08);--header-inner1: rgba(72, 29, 147, .12);--header-inner2: rgba(79, 70, 229, .08);--card-score-bd: rgba(124, 58, 237, .15);--featured-bg1: rgba(124, 58, 237, .4);--featured-bg2: rgba(59, 130, 246, .22);--featured-bd: rgba(124, 58, 237, .35);--section-label-color: #cbaefd;--section-label-bg: rgba(124, 58, 237, .48);--nav-link-active-bg: rgba(124, 58, 237, .25);--search-focus-border: rgba(124, 58, 237, .5);--search-focus-bg: rgba(124, 58, 237, .08);--qbody-border: #7c3aed;--dropdown-bg: rgba(16, 14, 32, .97);--orb1-color: #3b0764;--orb2-color: #1e1b4b;--orb3-color: #1d4ed8;--footer-bg: rgba(15, 18, 34, .75);--footer-glow-mid: rgba(124, 58, 237, .6);--footer-glow-side: rgba(167, 139, 250, .4);--footer-name-color: rgba(255, 255, 255, .88);--ff: "Outfit", sans-serif;--mono: "JetBrains Mono", monospace;--r-lg: 16px;--r-md: 12px;--r-sm: 8px;--r-xs: 6px;--glass: blur(18px) saturate(1.5)}html,body{height:100%;overflow:hidden}body{font-family:var(--ff);background:var(--bg);color:var(--t1);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}#bg-canvas{position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;pointer-events:none;overflow:hidden}.orb{position:absolute;border-radius:50%;filter:blur(90px);opacity:.4;animation:drift 22s ease-in-out infinite}.o1{width:700px;height:700px;background:radial-gradient(circle,var(--orb1-color),transparent 70%);top:-250px;left:-200px;animation-duration:28s}.o2{width:550px;height:550px;background:radial-gradient(circle,var(--orb2-color),transparent 70%);bottom:-200px;right:-150px;animation-duration:34s;animation-delay:-12s}.o3{width:400px;height:400px;background:radial-gradient(circle,var(--orb3-color),transparent 70%);top:45%;left:60%;opacity:.2;animation-duration:21s;animation-delay:-7s}.grid-lines{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);background-size:52px 52px}@keyframes drift{0%,to{transform:translate(0) scale(1)}33%{transform:translate(35px,-25px) scale(1.04)}66%{transform:translate(-18px,38px) scale(.97)}}.screen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1;display:flex;overflow-y:auto;height:100%;flex-direction:column;padding-top:20px;-webkit-overflow-scrolling:touch}.screen.hidden,.hidden{display:none!important}::-webkit-scrollbar{width:4px;height:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--s3);border-radius:4px}.gradient-text{background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btns{display:flex;gap:25px}.btn{font-family:var(--ff);font-weight:700;border:none;cursor:pointer;transition:all .18s;display:inline-flex;align-items:center;gap:6px;min-height:36px;touch-action:manipulation}.btn-primary{background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;box-shadow:0 0 18px var(--accent1-gl);border-radius:var(--r-sm);padding:8px 20px;font-size:.85rem}.btn-primary:hover{opacity:.88;transform:translateY(-1px)}.btn-primary:active{opacity:.8;transform:translateY(0)}.btn-ghost{background:#ffffff0d;border:1px solid rgba(255,255,255,.1);color:var(--t2);border-radius:var(--r-sm);padding:8px 18px;font-size:.82rem;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.btn-ghost:hover{color:var(--t1);border-color:var(--accent1-bd);background:var(--accent1-bg)}.btn-ghost:active{opacity:.75}.btn-icon{width:36px;height:36px;background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-xs);color:var(--t2);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .18s;touch-action:manipulation}.btn-icon:hover{color:var(--t1);border-color:var(--b2);background:var(--s2)}.btn-danger{background:transparent;border:1px solid var(--red-bd);color:var(--red);border-radius:var(--r-sm);padding:6px 14px;font-size:.78rem;font-family:var(--ff);font-weight:600;cursor:pointer;transition:all .18s;touch-action:manipulation;min-height:34px}.btn-danger:hover{background:#eb3131;color:#fff}.btn-danger:active{opacity:.75}.btn-pyq{display:inline-flex;align-items:center;gap:8px;text-decoration:none;padding:10px 14px;border-radius:10px;background:linear-gradient(135deg,#8b5cf62e,#6366f11f);border:1px solid rgba(139,92,246,.35);color:#c4b5fd;font-weight:600;font-size:1rem;letter-spacing:.3px;cursor:pointer;transition:all .4s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);touch-action:manipulation}.btn-pyq:hover{background:linear-gradient(135deg,#8b5cf647,#6366f12e);border-color:#8b5cf68c;color:#ddd6fe;transform:scale(1.08)}.btn-pyq:active{transform:translateY(0);opacity:.9}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}#home-screen{overflow-y:auto;height:100%;-webkit-overflow-scrolling:touch}.home-header,.topbar{position:relative;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(10px);background:var(--header-bg);border:1px solid rgba(255,255,255,.08);border-radius:14px;box-shadow:0 8px 30px #00000040,inset 0 1px #ffffff0f;padding:10px 18px;margin:0 30px}.home-header:before,.topbar:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;background:linear-gradient(120deg,var(--header-inner1),var(--header-inner2));pointer-events:none}.logo-wrap{display:flex;align-items:center;gap:12px;min-width:0}.logo-icon{width:40px;height:40px;flex-shrink:0;background:linear-gradient(135deg,var(--accent1),var(--accent2));border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 0 22px var(--accent1-gl),0 1px #fff3 inset;border:1px solid rgba(255,255,255,.15)}.logo-text{font-size:1.4rem;font-weight:900;letter-spacing:-1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.code-input-box{display:flex;align-items:center;max-width:460px;width:100%;background:var(--s1);border:1.5px solid var(--b2);border-radius:12px;overflow:hidden;transition:border-color .18s}.code-input-box:focus-within{border-color:var(--accent1)}.code-input-inner{flex:1;padding:11px 14px;background:transparent;border:none;outline:none;color:var(--t1);font-family:var(--mono);font-size:.9rem;letter-spacing:.08em;text-transform:uppercase}.code-input-inner::placeholder{text-transform:none;letter-spacing:0;color:var(--t3);font-family:var(--ff);font-size:.82rem}.code-input-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;border-left:1.5px solid var(--b2);color:var(--t3);cursor:pointer;transition:all .15s;flex-shrink:0}.code-input-btn:hover:not(:disabled){background:var(--accent1-bg);color:var(--accent1-hi);border-left-color:var(--accent1)}.code-input-btn:disabled{opacity:.3;cursor:not-allowed}::placeholder{text-transform:none}.tests-section{padding:0 36px}.section-header{display:flex;align-items:center;margin:20px 0}.section-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--section-label-color);background-color:var(--accent1)7b;border-radius:20px;padding:7px;margin:0 12px}.tests-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(390px,100%),1fr));gap:16px}.empty-state{grid-column:1/-1;text-align:center;padding:60px 20px;color:var(--t3)}.empty-state svg{opacity:.3;margin-bottom:16px}.empty-state p{font-size:.95rem}.test-card{background:var(--s1);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);border:1px solid var(--b1);border-radius:var(--r-lg);overflow:hidden;transition:all .22s;animation:fadeUp .4s ease both}.test-card:hover{border-color:var(--b3);transform:translateY(-2px);box-shadow:0 8px 32px #0000004d}.card-top{padding:20px 20px 16px;cursor:default}.card-name{font-size:.95rem;font-weight:700;color:var(--t1);margin-bottom:6px;line-height:1.35}.card-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px}.card-qcount{font-size:.72rem;color:var(--t3);font-family:var(--mono);background:var(--s2);padding:2px 9px;border-radius:10px}.subject-pill{font-size:.64rem;font-weight:700;padding:2px 8px;border-radius:10px;border:none}.pill-math{background:var(--math-gl);color:var(--math-c)}.pill-phys{background:var(--phys-gl);color:var(--phys-c)}.pill-chem{background:var(--chem-gl);color:var(--chem-c)}.pill-mixed{background:var(--accent1-gl);color:var(--accent1-hi)}.card-score{background:linear-gradient(135deg,var(--accent1-bg),rgba(var(--blue-raw,59,130,246),.06));border-top:1px solid var(--card-score-bd);padding:14px 20px;display:flex;align-items:center;border-radius:12px;margin:10px;gap:14px}.card-score-num{font-size:2.2rem;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.card-score-detail{flex:1}.card-score-label{font-size:.65rem;color:var(--t3);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}.card-score-stats{display:flex;gap:12px}.sstat{display:flex;flex-direction:column;align-items:center}.sstat-val{font-size:.95rem;font-weight:800;line-height:1}.sstat-lbl{font-size:.6rem;color:var(--t3);text-transform:uppercase;letter-spacing:.5px}.sstat.correct .sstat-val{color:var(--green)}.sstat.wrong .sstat-val{color:var(--red)}.sstat.skip .sstat-val{color:var(--t3)}.card-actions{padding:12px 20px;border-top:1px solid var(--b1);display:flex;gap:8px;flex-wrap:wrap;align-items:center}.card-actions .btn{font-size:.75rem;padding:6px 14px;border-radius:var(--r-xs)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;background:#000000b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:24px;animation:fadeIn .18s ease}.modal{background:var(--modal-bg);border:1px solid var(--b2);border-radius:20px;padding:32px;max-width:420px;width:100%;animation:scaleIn .25s cubic-bezier(.34,1.56,.64,1) both}.modal-title{font-size:1.2rem;font-weight:800;margin-bottom:8px}.modal-sub{font-size:.875rem;color:var(--t2);margin-bottom:24px;line-height:1.6}.modal-actions{display:flex;flex-direction:column;gap:10px}.modal-actions .btn{justify-content:center;padding:12px 20px;font-size:.9rem}.modal-close{position:absolute;top:16px;right:16px}#test-screen{flex-direction:column}.topbar{height:52px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:var(--topbar-bg);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass);border-bottom:1px solid var(--b1);flex-shrink:0;z-index:50;position:relative;gap:8px}.topbar-left{display:flex;align-items:center;gap:8px;flex:1;min-width:0}.logo-icon.sm{width:28px;height:28px;border-radius:7px;flex-shrink:0}.topbar-name{font-size:.8rem;font-weight:600;color:var(--t2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:160px}.topbar-center{display:flex;align-items:center;justify-content:center}.topbar-right{display:flex;align-items:center;gap:6px;flex-shrink:0}.mode-toggle{display:flex;background:var(--s1);border:1px solid var(--b1);border-radius:10px;padding:3px;gap:2px}.mode-btn{display:flex;align-items:center;gap:5px;font-family:var(--ff);font-size:.76rem;font-weight:700;padding:5px 11px;border-radius:7px;border:none;background:transparent;color:var(--t3);cursor:pointer;transition:all 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.25s}.sidebar-scroll{flex:1;overflow-y:auto;overflow-x:hidden;padding:12px;-webkit-overflow-scrolling:touch}.sidebar-section{margin-bottom:16px}.sidebar-section-head{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;padding:6px 4px 8px;display:flex;align-items:center;justify-content:space-between}.sidebar-section-count{font-size:.62rem;font-family:var(--mono);background:var(--s2);padding:1px 7px;border-radius:10px}.math-head{color:var(--math-c)}.phys-head{color:var(--phys-c)}.chem-head{color:var(--chem-c)}.eng-head{color:#f59e0b;border-left-color:#f59e0b}.q-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:5px}.q-tile{aspect-ratio:1;display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:700;border-radius:5px;border:1px solid var(--b1);background:var(--s1);color:var(--t3);cursor:pointer;transition:all .14s;position:relative;font-family:var(--mono);touch-action:manipulation}.q-tile:hover{border-color:var(--accent1);color:var(--accent1-hi);background:var(--accent1-bg)}.q-tile.active{background:linear-gradient(135deg,var(--accent1),var(--accent2));border-color:transparent;color:#fff;box-shadow:0 0 8px var(--accent1-gl)}.q-tile.answered{background:#3b82f61f;border-color:#3b82f64d;color:var(--blue)}.q-tile.result-correct{background:var(--green-bg);border-color:var(--green-bd);color:var(--green)}.q-tile.result-wrong{background:var(--red-bg);border-color:var(--red-bd);color:var(--red)}.q-tile.result-skip{background:var(--s1);border-color:var(--b1);color:var(--t3)}.num-dot{position:absolute;top:3px;right:3px;width:4px;height:4px;background:var(--amber);border-radius:50%}.q-panel{flex:1;overflow-y:auto;overflow-x:hidden;padding:24px 32px 100px;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}#q-container{max-width:760px;margin:0 auto}.q-meta{display:flex;align-items:center;gap:8px;margin-bottom:18px;animation:fadeUp .3s ease both;flex-wrap:wrap}.q-badge{font-family:var(--mono);font-size:.9rem;font-weight:700;background:linear-gradient(135deg,var(--accent1),var(--accent2));color:#fff;padding:3px 10px;border-radius:12px}.q-type-badge{font-size:.64rem;font-weight:700;text-transform:uppercase;letter-spacing:.7px;color:var(--amber);background:#f59e0b1a;border:1px solid rgba(245,158,11,.3);padding:3px 9px;border-radius:12px}.q-diff-badge{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.7px;padding:3px 9px;border-radius:12px}.diff-easy{color:var(--green);background:var(--green-bg);border:1px solid var(--green-bd)}.diff-moderate{color:var(--amber);background:#f59e0b1a;border:1px solid rgba(245,158,11,.3)}.diff-hard{color:var(--red);background:var(--red-bg);border:1px solid var(--red-bd)}.q-nav-hint{font-size:.72rem;color:var(--t3);margin-left:auto;font-family:var(--mono)}.q-body{background:var(--s1);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--accent1);border-radius:var(--r-lg);padding:20px 24px;margin-bottom:18px;font-size:1.25rem;line-height:1.85;color:var(--t1);animation:fadeUp .3s ease both;animation-delay:.05s;overflow-x:auto}.q-body img{max-width:100%;max-height:280px;object-fit:contain;border-radius:var(--r-sm);display:block;margin:8px auto}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-bottom:18px}.option-card{background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-md);padding:12px 14px;cursor:pointer;transition:all .18s;display:flex;align-items:flex-start;gap:10px;animation:fadeUp .3s ease both;position:relative;overflow:hidden;touch-action:manipulation}.option-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,var(--accent1),var(--accent2));opacity:0;transition:opacity .18s}.option-card:hover:not(.disabled){border-color:var(--accent1-bd);transform:translateY(-1px)}.option-card:hover:not(.disabled):before{opacity:.04}.option-card.selected{border-color:var(--accent1-bd);background:var(--accent1-bg)}.option-card.show-correct{border-color:var(--green-bd)!important;background:var(--green-bg)!important}.option-card.show-wrong{border-color:var(--red-bd)!important;background:var(--red-bg)!important}.option-card.disabled{cursor:default}.opt-label{width:28px;height:28px;flex-shrink:0;border-radius:7px;background:var(--s2);border:1px solid var(--b2);display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;color:var(--t2);transition:all .18s;position:relative;z-index:1;font-family:var(--mono)}.option-card.selected .opt-label{background:linear-gradient(135deg,var(--accent1),var(--accent2));border-color:transparent;color:#fff}.option-card.show-correct .opt-label{background:var(--green);border-color:transparent;color:#fff}.option-card.show-wrong .opt-label{background:var(--red);border-color:transparent;color:#fff}.opt-content{flex:1;min-width:0;font-size:.9rem;line-height:1.7;color:var(--t1);position:relative;z-index:1;padding-top:1px;overflow-x:auto}.opt-content img{max-width:100%;max-height:180px;object-fit:contain;border-radius:var(--r-xs);margin:4px 0}.num-wrap{background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-lg);padding:20px 22px;margin-bottom:18px;animation:fadeUp .3s ease 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both;animation-delay:.05s;flex-wrap:wrap}.num-rcard{flex:1;min-width:130px;background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-lg);padding:16px 20px}.num-rcard.correct-bg,.num-rcard.your-correct{background:var(--green-bg);border-color:var(--green-bd)}.num-rcard.your-wrong{background:var(--red-bg);border-color:var(--red-bd)}.num-rlabel{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--t3);margin-bottom:8px}.num-rval{font-family:var(--mono);font-size:1.8rem;font-weight:800;line-height:1}.num-rval.cv{color:var(--green)}.num-rval.wv{color:var(--red)}.num-rval.sv{font-size:.9rem;font-weight:500;color:var(--t3);padding-top:6px}.solution-block{background:#22c55e08;border:1px solid rgba(34,197,94,.15);border-radius:var(--r-lg);padding:20px 22px;margin-top:4px;animation:fadeUp .35s ease both;overflow-x:auto}.solution-head{display:flex;align-items:center;gap:8px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid rgba(34,197,94,.1);flex-wrap:wrap}.sol-tag{font-size:.64rem;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--green);background:var(--green-bg);border:1px solid var(--green-bd);padding:3px 9px;border-radius:12px}.sol-meta{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}.sol-pill{font-size:.64rem;font-weight:600;padding:2px 9px;border-radius:12px;background:var(--s2);border:1px solid var(--b2);color:var(--t2)}.solution-content{font-size:.92rem;line-height:1.85;color:var(--t1);overflow-x:auto}.solution-content img{max-width:100%;max-height:340px;object-fit:contain;border-radius:var(--r-sm);margin:8px auto;display:block;cursor:pointer}[data-theme-type=light] .solution-content--handwritten{background:#2e2e2e;border-radius:var(--r-sm);padding:10px}.sol-expand-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:8px;border:1px solid var(--b2);background:var(--s2);color:var(--accent1-hi);font-size:.68rem;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s;flex-shrink:0;touch-action:manipulation;letter-spacing:.2px}.sol-expand-btn:hover{background:var(--accent1-bg);border-color:var(--accent1-hi)}@media (max-width: 400px){.sol-expand-btn{padding:3px 7px;font-size:.64rem}}.sol-tab-switch{display:inline-flex;align-items:center;gap:2px;background:var(--s2);border:1px solid var(--b2);border-radius:7px;padding:2px;flex-shrink:0}.sol-tab-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:5px;border:none;background:transparent;color:var(--t3);font-size:.68rem;font-weight:600;cursor:pointer;transition:all .15s;font-family:var(--ff);touch-action:manipulation}.sol-tab-btn:hover{color:var(--t1)}.sol-tab-btn.active{background:var(--accent1);color:#fff;box-shadow:0 1px 4px var(--accent1-bd)}.vs-wrap{border-radius:10px;border:1px solid var(--b2);overflow:hidden;background:var(--s1)}.vs-in-solution .vs-wrap{border:none;border-top:1px solid var(--b1);border-radius:10px;margin-top:4px}.vs-header{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;border-bottom:1px solid var(--b1);background:var(--s2)}.vs-label{display:flex;align-items:center;gap:6px;font-size:.72rem;font-weight:700;color:var(--t2);text-transform:uppercase;letter-spacing:.8px}.vs-fullscreen-btn{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:6px;border:1px solid var(--b2);background:var(--s3);color:var(--t3);font-size:.68rem;font-weight:600;cursor:pointer;transition:all .15s;font-family:var(--ff);touch-action:manipulation}.vs-fullscreen-btn:hover{border-color:var(--accent1-hi);color:var(--accent1-hi);background:var(--accent1-bg)}.vs-player-wrap{position:relative;width:100%;padding-top:56.25%;background:#000}.vs-thumb-btn{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;padding:0;border:none;cursor:pointer;background:#000;overflow:hidden}.vs-thumb-img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease,filter .4s ease;filter:brightness(.82)}.vs-thumb-btn:hover .vs-thumb-img{transform:scale(1.03);filter:brightness(.65)}.vs-play-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;pointer-events:none}.vs-play-circle{width:60px;height:60px;border-radius:50%;background:var(--accent1);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:2px solid rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 24px var(--accent1-bd);transition:transform .2s,box-shadow .2s}.vs-thumb-btn:hover .vs-play-circle{transform:scale(1.08);box-shadow:0 6px 32px var(--accent1-gl)}.vs-play-label{font-size:.78rem;font-weight:700;color:#ffffffe6;letter-spacing:.3px;text-shadow:0 1px 4px rgba(0,0,0,.6)}.vs-iframe{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;border:none;display:block}@media (max-width: 660px){.vs-play-circle{width:48px;height:48px}.vs-play-label{font-size:.72rem}.vs-header{padding:8px 12px}.q-tile{font-size:1.2rem}}.nav-bar{display:flex;align-items:center;gap:8px;margin-top:20px;animation:fadeUp .3s ease both;animation-delay:.12s}.btn-nav{font-family:var(--ff);font-size:.78rem;font-weight:700;padding:8px 16px;border-radius:var(--r-sm);border:1px solid var(--b2);background:var(--s1);color:var(--t2);cursor:pointer;transition:all .16s;display:flex;align-items:center;gap:5px;touch-action:manipulation;min-height:36px}.btn-nav:hover:not(:disabled){color:var(--t1);border-color:var(--accent1);background:var(--accent1-bg)}.btn-nav:disabled{opacity:.3;cursor:not-allowed}.btn-clear-ans{font-family:var(--ff);font-size:.75rem;font-weight:600;padding:7px 14px;border-radius:var(--r-sm);border:1px solid var(--b1);background:transparent;color:var(--t3);cursor:pointer;margin-left:auto;transition:all .16s;touch-action:manipulation;min-height:34px}.btn-clear-ans:hover{color:var(--red);border-color:var(--red-bd)}#analysis-screen{overflow-y:auto;padding:28px 36px 80px;height:100%;-webkit-overflow-scrolling:touch}.analysis-back{display:flex;align-items:center;gap:10px;margin-bottom:28px;color:var(--t2);cursor:pointer;font-size:.85rem;font-weight:600;transition:color .18s;width:fit-content;touch-action:manipulation}.analysis-back:hover{color:var(--t1)}.analysis-hero{text-align:center;margin-bottom:36px;animation:fadeUp .5s ease both}.analysis-score-big{font-size:clamp(3.5rem,12vw,5.5rem);font-weight:900;line-height:1;background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 30px var(--accent1-gl))}.analysis-score-sub{font-size:.85rem;color:var(--t3);margin-top:6px;font-family:var(--mono)}.analysis-testname{font-size:1rem;font-weight:600;color:var(--t2);margin-bottom:6px}.analysis-subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:28px;max-width:780px;margin-left:auto;margin-right:auto;animation:fadeUp .5s ease both;animation-delay:.08s}.subj-card{background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-lg);padding:16px 14px;text-align:center;transition:transform .18s}.subj-card:hover{transform:translateY(-2px)}.subj-card.math{border-color:#60a5fa33;box-shadow:0 0 20px #60a5fa0d}.subj-card.phys{border-color:#f8717133;box-shadow:0 0 20px #f871710d}.subj-card.chem{border-color:#4ade8033;box-shadow:0 0 20px #4ade800d}.subj-name{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:8px}.subj-card.math .subj-name{color:var(--math-c)}.subj-card.phys .subj-name{color:var(--phys-c)}.subj-card.chem .subj-name{color:var(--chem-c)}.subj-marks{font-size:2rem;font-weight:900;line-height:1;margin-bottom:4px}.subj-card.math .subj-marks{color:var(--math-c)}.subj-card.phys .subj-marks{color:var(--phys-c)}.subj-card.chem .subj-marks{color:var(--chem-c)}.subj-max{font-size:.72rem;color:var(--t3);font-family:var(--mono)}.analysis-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;max-width:780px;margin:0 auto 28px;animation:fadeUp .5s ease both;animation-delay:.15s}.metric-card{background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-lg);padding:16px 14px;text-align:center}.metric-val{font-size:1.7rem;font-weight:900;line-height:1;margin-bottom:4px}.metric-lbl{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--t3)}.metric-card.m-correct .metric-val{color:var(--green)}.metric-card.m-wrong .metric-val{color:var(--red)}.metric-card.m-accuracy .metric-val{color:var(--accent1-hi)}.metric-card.m-attempted .metric-val{color:var(--blue)}.accuracy-track{max-width:780px;margin:0 auto 28px;background:var(--s2);border-radius:4px;height:5px;overflow:hidden;animation:fadeUp .5s ease both;animation-delay:.2s}.accuracy-fill{height:100%;background:linear-gradient(90deg,var(--gradient-start),var(--gradient-end));border-radius:4px;transition:width 1.2s cubic-bezier(.4,0,.2,1);width:0}.analysis-actions{display:flex;justify-content:center;gap:12px;max-width:780px;margin:0 auto;animation:fadeUp .5s ease both;animation-delay:.25s;flex-wrap:wrap}#score-overlay 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14px;margin-top:20px;margin-bottom:8px;flex-wrap:wrap}.cw-topics{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}.cw-topic-tag{font-size:.62rem;font-weight:600;color:var(--t3);background:var(--s2);border:1px solid var(--b1);border-radius:8px;padding:2px 8px;white-space:nowrap}.subject-pill.diff-easy{background:var(--green-bg);color:var(--green);border:1px solid var(--green-bd)}.subject-pill.diff-moderate{background:#f59e0b1a;color:var(--amber);border:1px solid rgba(245,158,11,.3)}.subject-pill.diff-hard{background:var(--red-bg);color:var(--red);border:1px solid var(--red-bd)}.mobile-bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;z-index:100;background:#060810f0;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--b2);padding:10px 16px;padding-bottom:max(10px,env(safe-area-inset-bottom));gap:8px;align-items:center;justify-content:space-between}@media (max-width: 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var(--accent1-gl);white-space:nowrap}.sidebar-drawer{display:none;position:fixed;top:0;right:0;bottom:0;left:0;z-index:150}.sidebar-drawer-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.sidebar-drawer-panel{position:absolute;bottom:0;left:0;right:0;background:var(--drawer-bg);border-top:1px solid var(--b2);border-radius:20px 20px 0 0;max-height:72vh;display:flex;flex-direction:column;overflow:hidden;animation:slideUp .28s cubic-bezier(.34,1.1,.64,1) both}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.sidebar-drawer-handle{width:40px;height:4px;background:var(--b2);border-radius:2px;margin:12px auto 8px;flex-shrink:0}.sidebar-drawer-inner{overflow-y:auto;padding:0 16px 24px;-webkit-overflow-scrolling:touch}.sidebar-drawer.open{display:block}@media (max-width: 900px){.sidebar{width:180px}.q-panel{padding:18px 20px 100px}.options-grid{grid-template-columns:1fr}.analysis-subjects{grid-template-columns:repeat(3,1fr)}.tests-grid{grid-template-columns:repeat(auto-fill,minmax(min(340px,100%),1fr))}}@media (max-width: 400px){.logo-text{font-size:1.1rem}.home-hero h1{font-size:1.75rem}.card-name{font-size:.88rem}.mode-toggle{gap:1px}.mode-btn{padding:8px 2px;font-size:.7rem;gap:3px}.mode-btn svg{width:11px;height:11px}.analysis-subjects{grid-template-columns:1fr}.subj-card{padding:12px 10px}}#ana-chapters{max-width:780px;margin:0 auto 28px;animation:fadeUp .5s ease both;animation-delay:.22s}.cw-tab-bar{position:relative;display:flex;gap:4px;background:var(--s1);border:1px solid var(--b1);border-radius:var(--r-md);padding:5px;margin-bottom:16px;overflow:hidden}.cw-tab-ink{position:absolute;top:5px;bottom:5px;left:5px;width:80px;border-radius:calc(var(--r-md) - 3px);opacity:.13;pointer-events:none;transition:left .28s cubic-bezier(.4,0,.2,1),width .28s cubic-bezier(.4,0,.2,1),background .28s ease;z-index:0}.cw-tab-btn{position:relative;z-index:1;flex:1;display:flex;align-items:center;justify-content:center;gap:7px;font-family:var(--ff);font-size:.78rem;font-weight:700;padding:8px 12px;border:none;border-radius:calc(var(--r-md) - 3px);background:transparent;color:var(--t3);cursor:pointer;transition:color .22s ease,background .22s ease;white-space:nowrap;touch-action:manipulation}.cw-tab-btn:hover:not(.active){color:var(--t2);background:var(--s2)}.cw-tab-btn.active{color:var(--tab-accent);background:var(--tab-bg)}.cw-tab-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;opacity:.5;transition:opacity .22s}.cw-tab-btn.active .cw-tab-dot{opacity:1}.cw-tab-btn:after{content:"";position:absolute;bottom:-5px;left:12px;right:12px;height:2px;border-radius:2px;background:var(--tab-accent);opacity:0;transform:scaleX(.4);transition:opacity .22s ease,transform .22s ease}.cw-tab-btn.active:after{opacity:1;transform:scaleX(1)}.cw-panels-wrap{position:relative;transition:height .3s ease}.cw-tab-panel{display:none;opacity:1;transform:translate(0);will-change:transform,opacity}.cw-tab-panel.active{display:block}.correct-chip{background:var(--green-bg);color:var(--green);border:1px solid var(--green-bd)}.wrong-chip{background:var(--red-bg);color:var(--red);border:1px solid var(--red-bd)}.skip-chip{background:var(--s2);color:var(--t3);border:1px solid var(--b1)}@media (max-width: 400px){.cw-tab-bar{flex-wrap:wrap}.cw-tab-btn{flex:1 1 40%}}.ham-btn{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:38px;height:38px;background:var(--s1);border:1px solid var(--b2);border-radius:var(--r-sm);cursor:pointer;flex-shrink:0;touch-action:manipulation;transition:border-color .18s,background .18s;padding:0}.ham-btn:hover{border-color:var(--accent1);background:var(--accent1-bg)}.ham-btn span{display:block;width:18px;height:2px;background:var(--t2);border-radius:2px;transform-origin:center;transition:transform .28s cubic-bezier(.4,0,.2,1),opacity .2s ease,background .18s ease}.ham-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg);background:var(--accent1-hi)}.ham-btn.open span:nth-child(2){opacity:0;transform:scaleX(0)}.ham-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);background:var(--accent1-hi)}.mobile-nav{position:fixed;top:0;right:0;bottom:0;left:0;z-index:180;pointer-events:none;visibility:hidden;transition:visibility 0s linear .28s}.mobile-nav.open{pointer-events:all;visibility:visible;transition-delay:0s}.mobile-nav-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#0000008c;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);opacity:0;transition:opacity .28s ease}.mobile-nav.open .mobile-nav-backdrop{opacity:1}.mobile-nav-panel{position:absolute;top:40px;left:0;right:0;background:var(--modal-bg);border-bottom:1px solid var(--b2);border-radius:0 0 22px 22px;padding:18px 16px 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