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6px;font-weight:600}.viz-caption-text{animation:viz-caption-in var(--dur-2) var(--ease-out) backwards;display:inline-block}@keyframes viz-caption-in{0%{opacity:0;transform:translateY(4px)}}.viz-legend{color:var(--text-2);flex-wrap:wrap;justify-content:center;gap:6px 12px;padding:0 14px 10px;font-size:12px;display:flex}.viz-chip{white-space:nowrap;align-items:center;gap:5px;display:inline-flex}.viz-chip i{border:2px solid var(--border-strong);background:var(--surface);border-radius:4px;width:12px;height:12px}.viz-chip[data-s=compare] i{border-color:var(--accent);background:var(--accent-soft)}.viz-chip[data-s=swap] i,.viz-chip[data-s=from] i{border-color:var(--star);background:color-mix(in srgb, var(--star) 24%, var(--surface))}.viz-chip[data-s=done] i{border-color:var(--good);background:var(--good-soft)}.viz-chip[data-s=active] i{border-color:var(--fun-1);background:color-mix(in srgb, var(--fun-1) 18%, var(--surface))}.viz-chip[data-s=range] 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(width<=420px){.bottom-nav{padding:5px;left:8px;right:8px}.bottom-nav:before{width:calc((100% - 10px) / var(--n));top:5px;bottom:5px;left:5px}.nav-item{font-size:10.5px}}@media (height<=500px) and (orientation:landscape){.nav-item{padding:5px 0}.nav-item span{display:none}.has-nav .shell-content{padding-bottom:calc(60px + var(--safe-bottom))}}.menu-sheet{flex-direction:column;gap:18px;display:flex}.menu-me{border:var(--bw) solid var(--border);border-radius:var(--radius);background:var(--gradient-soft);color:var(--text);transition:transform var(--dur-2) var(--ease-spring);align-items:center;gap:12px;padding:12px 14px 12px 12px;display:flex}.menu-me:active{transform:scale(.98)}.menu-me-avatar{width:46px;height:46px;font-size:16px}.menu-me-text{flex-direction:column;flex:1;min-width:0;line-height:1.3;display:flex}.menu-me-text b{text-overflow:ellipsis;white-space:nowrap;font-size:16px;font-weight:750;overflow:hidden}.menu-me-text span{color:var(--hint);font-size:12.5px}.menu-me-arrow{width:18px;height:18px;color:var(--hint);flex-shrink:0}.menu-search{border:var(--bw) solid var(--border);border-radius:var(--r-pill);background:var(--surface-2);min-height:46px;color:var(--hint);font:500 15px var(--font);text-align:left;cursor:pointer;align-items:center;gap:10px;padding:0 16px;display:flex}.menu-search svg{flex-shrink:0;width:18px;height:18px}.menu-title{letter-spacing:.08em;text-transform:uppercase;color:var(--hint);margin:0 2px 8px;font-size:11px;font-weight:750}.menu-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}@media (width>=560px){.menu-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}.menu-tile{border:var(--bw) solid var(--border);border-radius:var(--r-sm);background:var(--surface);min-height:58px;color:var(--text);transition:background var(--dur-1), border-color var(--dur-1), transform var(--dur-2) var(--ease-spring);align-items:center;gap:10px;padding:8px 10px 8px 8px;font-weight:650;line-height:1.2;display:flex}.menu-tile:active{transform:scale(.96)}.menu-tile-icon{background:color-mix(in srgb, var(--tone) 13%, var(--surface));width:38px;height:38px;color:var(--tone);border-radius:11px;flex-shrink:0;place-items:center;display:grid}.menu-tile-icon svg{width:20px;height:20px}.menu-tile-text{flex-direction:column;gap:2px;min-width:0;display:flex}.menu-tile-hint{-webkit-line-clamp:2;line-clamp:2;color:var(--hint);-webkit-box-orient:vertical;font-size:11.5px;font-weight:500;line-height:1.25;display:-webkit-box;overflow:hidden}.menu-tile-active{border-color:color-mix(in srgb, var(--tone,var(--accent)) 35%, var(--border));background:color-mix(in srgb, var(--tone,var(--accent)) 9%, var(--surface))}.menu-tile-active .menu-tile-icon{background:var(--tone);color:var(--surface)}.menu-actions{flex-wrap:wrap;gap:8px;display:flex}.menu-action{border:var(--bw) solid var(--border);border-radius:var(--r-sm);background:var(--surface-2);min-height:48px;color:var(--text);font:650 14.5px var(--font);cursor:pointer;transition:background var(--dur-1), color var(--dur-1);flex:140px;justify-content:center;align-items:center;gap:8px;padding:0 14px;display:flex}.menu-action svg{width:18px;height:18px}.menu-logout{color:var(--bad)}.menu-logout.logout-armed{background:var(--bad);color:var(--surface);border-color:#0000}@media (width>=1024px),(width>=768px) and (hover:hover) and (pointer:fine){.has-nav .shell-content{padding-bottom:0}.bottom-nav{display:none}.sidebar{width:var(--sidebar);background:var(--surface-glass);-webkit-backdrop-filter:saturate(160%)blur(20px);border-right:var(--bw) solid var(--border);scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent;transition:width var(--dur-2) var(--ease-out), padding var(--dur-2) var(--ease-out);flex-direction:column;flex-shrink:0;gap:2px;padding:16px 14px 14px;display:flex;overflow:hidden auto}.side-top{align-items:center;gap:6px;padding:0 0 14px;display:flex}.brand{border-radius:var(--r-sm);min-width:0;color:var(--text);font:700 17px var(--font-display);letter-spacing:-.02em;white-space:nowrap;flex:1;align-items:center;gap:10px;padding:2px 6px;display:flex}.brand .logo-mark{transition:transform var(--dur-3) var(--ease-spring);flex-shrink:0}.brand:hover .logo-mark{transform:rotate(-8deg)scale(1.06)}.side-toggle{width:34px;height:34px;color:var(--hint);cursor:pointer;transition:background var(--dur-1), color var(--dur-1);background:0 0;border:0;border-radius:10px;flex-shrink:0;place-items:center;padding:0;display:grid}.side-toggle:hover{background:var(--surface-2);color:var(--text)}.side-toggle svg{width:19px;height:19px}.side-search{border:var(--bw) solid var(--border);border-radius:var(--r-sm);background:var(--surface-2);height:38px;color:var(--hint);font:500 14px var(--font);cursor:pointer;transition:border-color var(--dur-1), color var(--dur-1);align-items:center;gap:9px;margin:0 0 6px;padding:0 8px 0 11px;display:flex}.side-search:hover{border-color:var(--border-strong);color:var(--text-2)}.side-search svg{flex-shrink:0;width:17px;height:17px}.side-search-text{text-align:left;flex:1}.side-search kbd{border:var(--bw) solid var(--border-strong);background:var(--surface);color:var(--hint);font:600 11px var(--mono);border-bottom-width:2px;border-radius:6px;padding:1px 6px}.side-group{flex-direction:column;gap:2px;display:flex}.side-link{border-radius:var(--r-sm);color:var(--text);transition:background var(--dur-1), color var(--dur-1);align-items:center;gap:11px;padding:6px 10px 6px 6px;font-weight:650;line-height:1.25;display:flex;position:relative}.side-icon{background:color-mix(in srgb, var(--tone) 13%, var(--surface));width:34px;height:34px;color:var(--tone);transition:background var(--dur-2), color var(--dur-2), transform var(--dur-2) var(--ease-spring), box-shadow var(--dur-2);border-radius:10px;flex-shrink:0;place-items:center;display:grid}.side-icon svg{width:19px;height:19px}.side-text{white-space:nowrap;flex-direction:column;min-width:0;display:flex}.side-hint{color:var(--hint);text-overflow:ellipsis;font-size:11.5px;font-weight:500;overflow:hidden}.side-link:hover{background:color-mix(in srgb, var(--tone) 7%, transparent)}.side-link:hover .side-icon{transform:scale(1.06)}.side-active,.side-active:hover{background:color-mix(in srgb, var(--tone) 12%, var(--surface));box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--tone) 22%, transparent)}.side-active .side-icon{background:var(--tone);color:var(--surface);box-shadow:0 4px 12px color-mix(in srgb, var(--tone) 40%, transparent)}.side-section{letter-spacing:.08em;text-transform:uppercase;color:var(--hint);white-space:nowrap;margin:14px 10px 4px;font-size:11px;font-weight:750}.side-group:first-of-type .side-section{margin-top:0}.side-section-btn{text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;padding:2px 0;display:flex}.side-section-btn:hover{color:var(--text-2)}.side-section-btn svg{width:14px;height:14px;transition:transform var(--dur-2) var(--ease-out);margin-left:auto}.side-section-btn[aria-expanded=false] svg{transform:rotate(-90deg)}.side-dot{background:var(--tone);border-radius:50%;width:6px;height:6px}.side-collapse{transition:grid-template-rows var(--dur-3) var(--ease-out);grid-template-rows:1fr;display:grid}.side-collapse[data-closed]{grid-template-rows:0fr}.side-collapse>div{flex-direction:column;gap:2px;min-height:0;display:flex;overflow:hidden}.side-user{border:var(--bw) solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-sm), var(--highlight);align-items:center;gap:6px;margin-top:auto;padding:10px;display:flex}.side-group:nth-last-child(2){margin-bottom:12px}.side-user .icon-btn{flex-shrink:0;width:34px;height:34px}.side-user .icon-btn svg{width:18px;height:18px}.side-user .logout-armed{background:var(--bad-soft);color:var(--bad)}.side-user-name{text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0;margin-left:2px;font-weight:650;line-height:1.25;overflow:hidden}.shell[data-side=rail] .sidebar{width:var(--rail);align-items:center;padding:14px 10px 12px}.shell[data-side=rail] .side-top{flex-direction:column;gap:4px;padding-bottom:8px}.shell[data-side=rail] .brand{flex:none;padding:2px}.shell[data-side=rail] .brand-name,.shell[data-side=rail] .side-search-text,.shell[data-side=rail] .side-search kbd,.shell[data-side=rail] .side-section,.shell[data-side=rail] .side-user-name{display:none}.shell[data-side=rail] .side-search{justify-content:center;width:46px;height:40px;padding:0}.shell[data-side=rail] .side-group{align-items:center;width:100%}.shell[data-side=rail] .side-group+.side-group{border-top:var(--bw) solid var(--border);margin-top:6px;padding-top:6px}.shell[data-side=rail] .side-collapse{width:100%}.shell[data-side=rail] .side-collapse>div{align-items:center;overflow:visible}.shell[data-side=rail] .side-link{justify-content:center;width:52px;padding:5px}.shell[data-side=rail] .side-text{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.shell[data-side=rail] .side-user{flex-direction:column;gap:4px;padding:6px}.rail-tip{left:calc(var(--rail) + 6px);z-index:60;background:var(--text);color:var(--surface);font:650 13px/1.3 var(--font);white-space:nowrap;box-shadow:var(--shadow-lg);pointer-events:none;animation:rail-tip-in .14s var(--ease-out);border-radius:10px;flex-direction:column;padding:6px 11px;display:flex;position:fixed;transform:translateY(-50%)}.rail-tip span{opacity:.72;font-size:11.5px;font-weight:500}.rail-tip:before{content:"";background:inherit;border-radius:2px;width:9px;height:9px;position:absolute;top:50%;left:-4px;transform:translateY(-50%)rotate(45deg)}}@keyframes rail-tip-in{0%{opacity:0;translate:-4px}}@media (width>=1024px) and (height<=820px),(width>=768px) and (hover:hover) and (pointer:fine) and (height<=820px){.side-hint{display:none}.side-icon{border-radius:9px;width:30px;height:30px}.side-icon svg{width:17px;height:17px}.side-section{margin-top:10px}.side-top{padding-bottom:10px}}.nav-search-backdrop{z-index:70;padding:calc(var(--safe-top) + 10px) 10px 10px;background:var(--backdrop);-webkit-backdrop-filter:blur(6px);animation:fade var(--dur-2) ease;justify-content:center;align-items:flex-start;display:flex;position:fixed;inset:0}@media (width>=720px){.nav-search-backdrop{padding-top:12vh}}.nav-search{width:min(640px,100%);max-height:min(580px, calc(var(--app-height,100dvh) - 24px));border:var(--bw) solid var(--border);border-radius:var(--radius-lg);background:var(--surface);box-shadow:var(--shadow-lg), var(--highlight);animation:nav-search-in .2s var(--ease-out);flex-direction:column;display:flex;overflow:hidden}@keyframes nav-search-in{0%{opacity:0;transform:translateY(-10px)scale(.98)}}.nav-search-field{border-bottom:var(--bw) solid var(--border);color:var(--hint);align-items:center;gap:10px;padding:10px 12px 10px 16px;display:flex}.nav-search-field>svg{flex-shrink:0;width:20px;height:20px}.nav-search-field input{min-width:0;min-height:34px;color:var(--text);font:500 16px/1.3 var(--font);background:0 0;border:0;outline:none;flex:1}.nav-search-field input::placeholder{color:var(--hint)}.nav-search-esc{border:var(--bw) solid var(--border-strong);background:var(--surface-2);color:var(--hint);font:600 11.5px var(--mono);cursor:pointer;border-bottom-width:2px;border-radius:7px;padding:3px 8px}.nav-search-list{overscroll-behavior:contain;padding:4px 6px 8px;overflow-y:auto}.nav-search-group{letter-spacing:.08em;text-transform:uppercase;color:var(--hint);padding:12px 10px 4px;font-size:11px;font-weight:750}.nav-search-item{border-radius:var(--r-sm);min-height:44px;color:var(--text);cursor:pointer;align-items:center;gap:11px;padding:5px 10px 5px 6px;display:flex}.nav-search-item[aria-selected=true]{background:var(--accent-soft)}.nav-search-icon{background:var(--surface-2);width:32px;height:32px;color:var(--hint);transition:background var(--dur-1), color var(--dur-1);border-radius:9px;flex-shrink:0;place-items:center;display:grid}.nav-search-icon svg{width:17px;height:17px}.nav-search-item[aria-selected=true] .nav-search-icon{background:var(--accent);color:var(--on-accent)}.nav-search-label{text-overflow:ellipsis;white-space:nowrap;flex:0 auto;min-width:0;font-weight:650;overflow:hidden}.nav-search-hint{min-width:0;color:var(--hint);text-overflow:ellipsis;white-space:nowrap;flex:1 1 0;font-size:12.5px;overflow:hidden}.nav-search-enter{width:16px;height:16px;color:var(--accent);opacity:0;flex-shrink:0;margin-left:auto}.nav-search-item[aria-selected=true] .nav-search-enter{opacity:1}.nav-search-empty{text-align:center;color:var(--hint);padding:32px 16px}.nav-search-foot{border-top:var(--bw) solid var(--border);background:var(--surface-2);color:var(--hint);gap:18px;padding:8px 16px;font-size:12px;display:flex}.nav-search-foot kbd{border:var(--bw) solid var(--border-strong);background:var(--surface);min-width:1.7em;font:600 11px/1.5 var(--mono);text-align:center;border-bottom-width:2px;border-radius:5px;margin-right:3px;padding:0 4px;display:inline-block}@media (pointer:coarse){.nav-search-foot,.nav-search-enter,.nav-search-esc{display:none}}:root{--code-auto:14px;--code:var(--code-size,var(--code-auto))}@media (width<=520px){:root{--code-auto:13px}}.size-controls{flex-direction:column;gap:10px;display:flex}.size-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.size-label{font-weight:650}.size-stepper{border:var(--bw) solid var(--border);border-radius:var(--r-pill);background:var(--surface-2);align-items:center;padding:3px;display:inline-flex}.size-btn{border-radius:var(--r-pill);background:var(--surface);width:40px;height:36px;color:var(--accent);box-shadow:var(--shadow-sm);cursor:pointer;transition:transform var(--dur-2) var(--ease-spring), opacity var(--dur-1);border:0;place-items:center;padding:0;display:grid}.size-btn:active:not(:disabled){transform:scale(.9)}.size-btn:disabled{opacity:.35;cursor:default;box-shadow:none}.size-btn svg{width:17px;height:17px}.size-value{text-align:center;font-variant-numeric:tabular-nums;min-width:74px;font-weight:700}.size-sample{border:var(--bw) dashed var(--border-strong);border-radius:var(--r-sm);background:var(--surface);padding:12px 14px}.size-sample p{margin:0 0 8px}.size-sample pre{margin:0}.size-reset{align-self:flex-start}.topbar-bare{margin-bottom:-56px}.topbar-bare:not(.topbar-scrolled){-webkit-backdrop-filter:none;pointer-events:none;background:0 0}.topbar-bare+.page{padding-top:max(16px, calc(var(--safe-top) + 10px))}@media (width>=1024px){.topbar-bare+.page{padding-top:28px}}.nowrap{white-space:nowrap}.shell-content:has(>.teacher-subnav){flex-direction:column;display:flex}.shell-content:has(>.teacher-subnav)>*{flex-shrink:0;width:100%}.shell-content>.teacher-subnav{order:1}.shell-content:has(>.teacher-subnav)>:not(.teacher-subnav,.topbar){order:2}.ava{--ring:transparent;width:var(--ava-size,40px);height:var(--ava-size,40px);background:var(--surface-3);box-shadow:0 0 0 calc(var(--ava-size,40px) * .06) var(--ring);isolation:isolate;border-radius:50%;flex-shrink:0;place-items:center;display:inline-grid;position:relative;overflow:visible}.ava>.mascot,.ava-photo,.ava-emoji{border-radius:50%}.ava>.mascot{margin-top:calc(var(--ava-size,40px) * .04)}.ava-photo{object-fit:cover;width:100%;height:100%}.ava-emoji{font-size:calc(var(--ava-size,40px) * .56);line-height:1}.ava-frame-bronze{--ring:#c4824a}.ava-frame-silver{--ring:#b8c2cf}.ava-frame-gold{--ring:#f5b40b}.ava-frame-neon{--ring:var(--accent);box-shadow:0 0 0 calc(var(--ava-size,40px) * .05) var(--accent), 0 0 calc(var(--ava-size,40px) * .3) var(--glow)}.ava-frame-bronze:after,.ava-frame-silver:after,.ava-frame-gold:after,.ava-frame-fire:after,.ava-frame-star:after,.ava-frame-rainbow:after{content:"";inset:calc(var(--ava-size,40px) * -.09);z-index:-1;pointer-events:none;border-radius:50%;position:absolute}.ava-frame-bronze:after{background:conic-gradient(from 200deg,#8a5a2b,#e3a46b,#8a5a2b,#c4824a,#8a5a2b)}.ava-frame-silver:after{background:conic-gradient(from 200deg,#7d8794,#f1f5f9,#7d8794,#cbd5e1,#7d8794)}.ava-frame-gold:after{box-shadow:0 0 calc(var(--ava-size,40px) * .25) #f5b40b8c;background:conic-gradient(from 200deg,#b7791f,#fff1a8,#d69e2e,#fde68a,#b7791f)}.ava-frame-bronze,.ava-frame-silver,.ava-frame-gold{box-shadow:0 0 0 calc(var(--ava-size,40px) * .03) var(--surface)}.ava-frame-fire:after{filter:blur(.5px);background:conic-gradient(#ef4444,#f97316,#fde047,#f97316,#ef4444);animation:1.4s ease-in-out infinite ava-flicker}.ava-frame-star:after{background:conic-gradient(#22d3ee,#a78bfa,#22d3ee,#a78bfa,#22d3ee)}.ava-frame-rainbow:after{background:conic-gradient(#ef4444,#f97316,#facc15,#22c55e,#06b6d4,#6366f1,#a855f7,#ef4444);animation:6s linear infinite spin}.ava-frame-fire,.ava-frame-star,.ava-frame-rainbow{box-shadow:0 0 0 calc(var(--ava-size,40px) * .03) var(--surface)}@keyframes ava-flicker{50%{filter:blur(1px)brightness(1.2);transform:scale(1.03)}}.profile-hero{border:var(--bw) solid color-mix(in srgb, var(--accent) 20%, var(--border));border-radius:var(--radius-lg);background:radial-gradient(90% 120% at 0% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%), var(--surface);box-shadow:var(--shadow-sm), var(--highlight);align-items:center;gap:18px;padding:20px;display:flex}.profile-name{font:700 24px/1.2 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