:root{--font:"Nunito","Segoe UI Rounded","SF Pro Rounded",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--bg:#eef1ff;--bg-blob-1:#c7d2fe;--bg-blob-2:#fbcfe8;--bg-blob-3:#bae6fd;--surface:#ffffff;--surface-2:#f6f7fd;--surface-3:#eceffb;--border:#e2e6f5;--text:#1c2340;--text-soft:#5a6386;--text-faint:#8b93b3;--accent:#6d5efc;--accent-strong:#5546e8;--accent-soft:#ece9ff;--accent-contrast:#ffffff;--success:#12a150;--success-soft:#e3f8ec;--success-border:#8fdcb1;--danger:#e0396b;--danger-soft:#fdeaf0;--danger-border:#f4a6bf;--warning:#f59e0b;--shadow-sm:0 2px 6px rgba(28,35,64,0.06);--shadow:0 10px 30px rgba(28,35,64,0.1);--shadow-lg:0 24px 60px rgba(28,35,64,0.16);--radius:18px;--radius-lg:26px;--radius-pill:999px}:root[data-theme=dark]{--bg:#0a0e1e;--bg-blob-1:#2a2f6b;--bg-blob-2:#5b2a55;--bg-blob-3:#123b52;--surface:#141a2f;--surface-2:#1b2239;--surface-3:#232b46;--border:#2b3350;--text:#e9ecff;--text-soft:#a8b0d4;--text-faint:#7a83a8;--accent:#8b7dff;--accent-strong:#a396ff;--accent-soft:#262246;--accent-contrast:#12132a;--success:#3ddc8b;--success-soft:#14301f;--success-border:#2f7a52;--danger:#ff789f;--danger-soft:#34131f;--danger-border:#8c3855;--shadow-sm:0 2px 6px rgba(0,0,0,0.3);--shadow:0 10px 30px rgba(0,0,0,0.45);--shadow-lg:0 24px 60px rgba(0,0,0,0.55)}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background-color .3s ease,color .3s ease}body:after,body:before{content:"";position:fixed;z-index:-1;border-radius:50%;filter:blur(90px);opacity:.75;pointer-events:none}body:before{width:46vw;height:46vw;min-width:320px;min-height:320px;top:-14vw;left:-10vw;background:var(--bg-blob-1)}body:after{width:40vw;height:40vw;min-width:280px;min-height:280px;bottom:-16vw;right:-8vw;background:var(--bg-blob-2)}h1,h2,h3{margin:0;line-height:1.2;letter-spacing:-.01em}p{margin:0;line-height:1.6}button{font:inherit;cursor:pointer}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}.shell{max-width:1120px;margin:0 auto;padding:20px 20px 64px}.topbar{justify-content:space-between;gap:16px;padding:10px 0 26px}.brand,.topbar{display:flex;align-items:center}.brand{gap:12px;font-weight:800;font-size:1.05rem;color:var(--text)}.brand,.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;font-size:1.3rem;background:linear-gradient(135deg,var(--accent),#f472b6);box-shadow:var(--shadow-sm)}.topbar-actions{display:flex;align-items:center;gap:10px}.stack{display:flex;flex-direction:column;gap:18px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:26px}.card-tight{padding:18px;border-radius:var(--radius)}.hero{display:grid;grid-template-columns:1.2fr 1fr;grid-gap:28px;gap:28px;align-items:center}.hero-emoji{font-size:clamp(3.5rem,12vw,6.5rem);text-align:center;line-height:1;filter:drop-shadow(0 12px 20px rgba(0,0,0,.18));animation:float 4s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-10px) rotate(2deg)}}.title{font-size:clamp(1.7rem,4.5vw,2.6rem);font-weight:900}.title-gradient{background:linear-gradient(120deg,var(--accent),#ec4899 60%,#f59e0b);-webkit-background-clip:text;background-clip:text;color:transparent}.subtitle{color:var(--text-soft);font-size:1.02rem}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;color:var(--text-faint)}.btn,.eyebrow{font-weight:800}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:var(--radius-pill);padding:13px 24px;font-size:1rem;background:var(--surface-3);color:var(--text);transition:transform .15s ease,box-shadow .15s ease,background-color .15s ease}.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:var(--accent-contrast);box-shadow:0 8px 20px rgba(109,94,252,.35)}.btn-ghost{background:transparent;border:2px solid var(--border);color:var(--text-soft)}.btn-lg{padding:16px 32px;font-size:1.1rem}.btn-block{width:100%}.icon-btn{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:1.15rem;box-shadow:var(--shadow-sm);transition:transform .15s ease}.icon-btn:hover{transform:translateY(-2px) rotate(-6deg)}.field{display:flex;flex-direction:column;gap:8px}.label{font-weight:800;font-size:.9rem;color:var(--text-soft)}.input{width:100%;padding:15px 18px;font:inherit;font-weight:700;color:var(--text);background:var(--surface-2);border:2px solid var(--border);border-radius:var(--radius);transition:border-color .15s ease,background-color .15s ease}.input::placeholder{color:var(--text-faint);font-weight:500}.input:focus{outline:none;border-color:var(--accent);background:var(--surface)}.alert{padding:12px 16px;border-radius:var(--radius);font-weight:700;font-size:.92rem;background:var(--danger-soft);color:var(--danger);border:1px solid var(--danger-border)}.alert-info{background:var(--accent-soft);color:var(--accent-strong);border-color:transparent}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:var(--radius-pill);background:var(--surface-2);border:1px solid var(--border);font-size:.85rem;font-weight:700;color:var(--text-soft)}.chip-accent{background:var(--accent-soft);color:var(--accent-strong);border-color:transparent}.chip-button{cursor:pointer;transition:transform .15s ease,border-color .15s ease}.chip-button:hover{transform:translateY(-2px);border-color:var(--accent)}.chip-button[aria-pressed=true]{background:var(--accent);color:var(--accent-contrast);border-color:transparent}.runner{display:grid;grid-template-columns:260px 1fr;grid-gap:22px;gap:22px;align-items:start}.sidebar{position:-webkit-sticky;position:sticky;top:20px;display:flex;flex-direction:column;gap:18px}.ring-wrap{display:flex;align-items:center;gap:16px}.ring{--value:0;position:relative;flex:0 0 auto;width:84px;height:84px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--value) * 1%),var(--surface-3) 0);display:grid;place-items:center;transition:background .4s ease}.ring:after{content:"";position:absolute;inset:9px;border-radius:50%;background:var(--surface)}.ring-label{position:relative;z-index:1;font-weight:900;font-size:1.05rem}.stat-list{flex-direction:column}.stat,.stat-list{display:flex;gap:10px}.stat{align-items:center;justify-content:space-between;font-size:.92rem;font-weight:700;color:var(--text-soft)}.stat b{font-size:1.05rem;color:var(--text)}.stat-success b{color:var(--success)}.stat-danger b{color:var(--danger)}.dot-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(26px,1fr));grid-gap:7px;gap:7px}.dot{aspect-ratio:1;min-height:26px;border-radius:9px;display:grid;place-items:center;font-size:.72rem;font-weight:800;background:var(--surface-3);color:var(--text-faint);border:2px solid transparent}.dot-correct{background:var(--success-soft);color:var(--success);border-color:var(--success-border)}.dot-wrong{background:var(--danger-soft);color:var(--danger);border-color:var(--danger-border)}.dot-current{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.dot-current:not(.dot-correct):not(.dot-wrong){color:var(--accent);background:var(--accent-soft)}.question-card{display:flex;flex-direction:column;gap:20px;animation:pop-in .28s ease}@keyframes pop-in{0%{opacity:0;transform:translateY(10px) scale(.99)}to{opacity:1;transform:none}}.question-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.question-task{font-weight:800;color:var(--text-soft);font-size:.95rem}.prompt{font-size:clamp(1.25rem,3.2vw,1.75rem);font-weight:800;line-height:1.45;letter-spacing:.01em}.prompt .gap{display:inline-block;min-width:84px;border-bottom:4px dotted var(--accent);vertical-align:bottom}.hint{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--radius-pill);background:var(--accent-soft);color:var(--accent-strong);font-weight:800;font-size:.95rem}.options{display:grid;grid-gap:12px;gap:12px}.options-2col{grid-template-columns:repeat(2,1fr)}.option{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:16px 18px;border-radius:var(--radius);border:2px solid var(--border);background:var(--surface-2);color:var(--text);font-weight:700;font-size:1.05rem;transition:transform .12s ease,border-color .15s ease,background-color .15s ease}.option:hover:not(:disabled){transform:translateY(-2px);border-color:var(--accent);background:var(--surface)}.option:disabled{cursor:default}.option-key{display:grid;place-items:center;flex:0 0 auto;width:32px;height:32px;border-radius:11px;background:var(--surface-3);color:var(--text-soft);font-size:.9rem;font-weight:900}.option-text{flex:1 1}.option-correct{border-color:var(--success);background:var(--success-soft);color:var(--success);animation:nudge .4s ease}.option-correct .option-key{background:var(--success);color:#fff}.option-wrong{border-color:var(--danger);background:var(--danger-soft);color:var(--danger);animation:shake .4s ease}.option-wrong .option-key{background:var(--danger);color:#fff}.option-muted:disabled{opacity:.55}@keyframes nudge{0%,to{transform:scale(1)}45%{transform:scale(1.025)}}@keyframes shake{0%,to{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}.feedback{display:flex;gap:14px;align-items:flex-start;padding:18px;border-radius:var(--radius);border:1px solid;animation:pop-in .25s ease}.feedback-correct{background:var(--success-soft);border-color:var(--success-border)}.feedback-wrong{background:var(--danger-soft);border-color:var(--danger-border)}.feedback-emoji{font-size:1.8rem;line-height:1}.feedback-title{font-weight:900;font-size:1.05rem;margin-bottom:4px}.feedback-correct .feedback-title{color:var(--success)}.feedback-wrong .feedback-title{color:var(--danger)}.feedback-text{color:var(--text-soft);font-weight:600;font-size:.97rem;line-height:1.5}.feedback-text em{color:var(--text);font-style:normal;font-weight:800}.feedback-body{gap:12px;min-width:0}.feedback-body,.note-list{display:flex;flex-direction:column}.note-list{gap:8px;margin:0;padding:0;list-style:none}.note{display:grid;grid-template-columns:22px 1fr;grid-gap:10px;gap:10px;padding:10px 12px;border-radius:14px;border:1px solid var(--border);background:var(--surface)}.note-correct{border-color:var(--success-border)}.note-wrong{border-color:var(--danger-border)}.note-mark{display:grid;place-items:center;width:22px;height:22px;border-radius:8px;font-size:.8rem;font-weight:900;color:#fff;background:var(--danger)}.note-correct .note-mark{background:var(--success)}.note-body{display:flex;flex-direction:column;gap:4px;min-width:0}.note-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px}.note-option{font-weight:800;color:var(--text);word-break:break-word}.note-tag{padding:1px 8px;border-radius:var(--radius-pill);background:var(--surface-3);color:var(--text-faint);font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.02em;white-space:nowrap}.note-text{margin:0;font-size:.9rem;font-weight:600;color:var(--text-soft);line-height:1.45}.note-more{margin-top:2px}.note-more>summary{cursor:pointer;width:-moz-fit-content;width:fit-content;padding:4px 12px;border-radius:var(--radius-pill);background:var(--surface-3);color:var(--text-soft);font-size:.84rem;font-weight:800}.note-more>summary:hover{color:var(--accent)}.note-more[open]>summary{margin-bottom:8px}.question-footer{display:flex;justify-content:flex-end}.score-hero{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;padding:34px 26px}.score-emoji{font-size:4.5rem;line-height:1;animation:float 3.5s ease-in-out infinite}.score-value{font-size:clamp(2.6rem,9vw,4rem);font-weight:900}.score-bar{width:100%;max-width:420px;height:14px;border-radius:var(--radius-pill);background:var(--surface-3);overflow:hidden}.score-bar span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),#ec4899);transition:width .8s cubic-bezier(.2,.8,.2,1)}.review-list{display:flex;flex-direction:column;gap:12px}.review-item{display:grid;grid-template-columns:38px 1fr;grid-gap:14px;gap:14px;padding:16px 18px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface-2)}.review-item.is-wrong{border-color:var(--danger-border);background:var(--danger-soft)}.review-badge{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;font-weight:900;background:var(--success);color:#fff}.review-item.is-wrong .review-badge{background:var(--danger)}.review-body{display:flex;flex-direction:column;gap:8px;min-width:0}.review-prompt{font-weight:800;font-size:1.02rem;word-break:break-word}.gap-inline{display:inline-block;min-width:56px;border-bottom:3px dotted var(--accent)}.blank-filled{color:var(--success);text-decoration:underline;-webkit-text-decoration-style:dotted;text-decoration-style:dotted;text-underline-offset:4px}.answer-line{font-size:.94rem;font-weight:700;color:var(--text-soft)}.answer-line b{color:var(--text)}.answer-line.is-correct b{color:var(--success)}.answer-line.is-wrong b{color:var(--danger);text-decoration:line-through}.explanation{font-size:.93rem;line-height:1.5;color:var(--text-soft);font-weight:600;border-left:3px solid var(--accent);padding-left:10px}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}table{width:100%;border-collapse:collapse;min-width:520px}td,th{padding:13px 14px;text-align:left;border-bottom:1px solid var(--border);font-size:.95rem}th{font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);font-weight:800}td{font-weight:700}tbody tr:last-child td{border-bottom:none}tbody tr:hover td{background:var(--surface-2)}.rank{display:grid;place-items:center;width:30px;height:30px;border-radius:10px;background:var(--surface-3);font-weight:900;font-size:.85rem}.rank-1{background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#422006}.rank-2{background:linear-gradient(135deg,#e5e7eb,#9ca3af);color:#1f2937}.rank-3{background:linear-gradient(135deg,#fdba74,#ea9a5b);color:#431407}.score-pill{display:inline-block;padding:4px 12px;border-radius:var(--radius-pill);font-weight:900;font-size:.9rem;background:var(--surface-3)}.score-pill.is-great{background:var(--success-soft);color:var(--success)}.score-pill.is-ok{background:var(--accent-soft);color:var(--accent-strong)}.score-pill.is-low{background:var(--danger-soft);color:var(--danger)}.empty{text-align:center;padding:40px 20px;color:var(--text-soft)}.empty-emoji{font-size:3rem;display:block;margin-bottom:12px}.divider{height:1px;background:var(--border);border:none;margin:4px 0}.row-between{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.muted{color:var(--text-soft);font-size:.92rem}.center{text-align:center}.spinner{width:42px;height:42px;margin:60px auto;border-radius:50%;border:4px solid var(--surface-3);border-top-color:var(--accent);animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (max-width:900px){.hero{text-align:center}.hero,.runner{grid-template-columns:1fr}.sidebar{position:static;flex-direction:row;flex-wrap:wrap;gap:12px}.sidebar>*{flex:1 1 240px}}@media (max-width:620px){.shell{padding:14px 14px 48px}.card{padding:20px;border-radius:var(--radius)}.options-2col{grid-template-columns:1fr}.option{font-size:1rem;padding:14px 16px}.sidebar>*{flex:1 1 100%}.dot-grid{grid-template-columns:repeat(auto-fill,minmax(30px,1fr))}}@media (hover:none){.btn:hover:not(:disabled),.chip-button:hover,.icon-btn:hover,.option:hover:not(:disabled){transform:none}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}