.studio-app,.studio-portal{--studio-bg:#fff;--studio-chrome:#fff;--studio-surface:#fff;--studio-surface-2:#f7f7f7;--studio-surface-3:#efefef;--studio-border-subtle:#0a0a0a17;--studio-border-strong:#0a0a0a29;--studio-text-1:#000;--studio-text-2:#464646;--studio-text-3:#8a8a8a;--studio-brand:#000;--studio-brand-soft:#f6f5f4;--studio-on-brand:#fff;--studio-accent:var(--studio-brand);--studio-success:#12a150;--studio-warning:#c77c0e;--studio-danger:#c62828;--studio-sand:#f6f5f4;--studio-tile:#f7f7f7;--studio-r-tile:24px;--studio-r-panel:20px;--studio-r-input:12px;--studio-focus:0 0 0 4px #00000014;--studio-ai-grad:linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 50%, #1a1a1a 100%);--studio-ai-grad-soft:linear-gradient(135deg, #00000009 0%, #00000012 50%, #00000009 100%);--studio-font-sans:"Inter", system-ui, -apple-system, sans-serif;--studio-font-serif:"Fraunces", "Times New Roman", serif;--studio-font-mono:"JetBrains Mono", ui-monospace, monospace;--studio-text-primary:var(--studio-text-1);--studio-text-secondary:var(--studio-text-2);--studio-text-tertiary:var(--studio-text-3)}[data-studio-theme=dark] .studio-app,[data-studio-theme=dark] .studio-portal,[data-theme=midnight] .studio-app,[data-theme=midnight] .studio-portal{--studio-bg:#0b0b0c;--studio-chrome:#0b0b0c;--studio-surface:#141415;--studio-surface-2:#1a1a1c;--studio-surface-3:#232326;--studio-border-subtle:#ffffff1a;--studio-border-strong:#ffffff2e;--studio-text-1:#f5f5f5;--studio-text-2:#b4b4b4;--studio-text-3:#7a7a7a;--studio-brand:#f5f5f5;--studio-brand-soft:#1a1a1c;--studio-on-brand:#0b0b0c;--studio-sand:#141415;--studio-tile:#1a1a1c;--studio-focus:0 0 0 4px #ffffff1a;--studio-ai-grad:linear-gradient(135deg, #e5e5e5 0%, #8a8a8a 50%, #e5e5e5 100%);--studio-ai-grad-soft:linear-gradient(135deg, #ffffff0a 0%, #ffffff14 50%, #ffffff0a 100%)}.studio-portal{font-family:var(--studio-font-sans);color:var(--studio-text-1)}.studio-app{font-family:var(--studio-font-sans);color:var(--studio-text-1);background:var(--studio-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"cv11", "ss01";font-size:14px;line-height:1.5}.studio-app *{box-sizing:border-box}.studio-app .studio-serif,.studio-portal .studio-serif{font-family:var(--studio-font-serif);letter-spacing:-.025em;font-weight:300}.studio-app .font-serif-studio,.studio-portal .font-serif-studio{font-family:var(--studio-font-serif)}.studio-app .studio-mono{font-family:var(--studio-font-mono)}@keyframes studio-app-shimmer{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}.studio-app .studio-ai-grad{background:var(--studio-ai-grad);background-size:200% 200%;animation:6s linear infinite studio-app-shimmer}.studio-app .studio-ai-grad-soft{background:var(--studio-ai-grad-soft)}.studio-app ::-webkit-scrollbar{width:10px;height:10px}.studio-app ::-webkit-scrollbar-track{background:0 0}.studio-app ::-webkit-scrollbar-thumb{border:2px solid var(--studio-bg);background:#0000001a;border-radius:10px}.studio-app ::-webkit-scrollbar-thumb:hover{background:#0000002e}.studio-app ::selection{background:var(--studio-brand);color:var(--studio-on-brand)}.studio-app{filter:none;perspective:none;-webkit-backdrop-filter:none;backdrop-filter:none;transform:none}.studio-app .studio-shell{background:var(--studio-bg);min-height:100vh;color:var(--studio-text-1);box-sizing:border-box;padding-top:72px;padding-left:64px;padding-right:320px;position:relative}@media (max-width:900px){.studio-app .studio-shell{padding-right:0}.studio-app .studio-rightrail{display:none!important}}@media (max-width:768px){.studio-app .studio-rail{display:none!important}.studio-app .studio-shell{padding-left:0;padding-bottom:calc(88px + env(safe-area-inset-bottom,0px))}}.studio-app .studio-shell--single{padding:0}.studio-app .studio-assistant{box-sizing:border-box;min-height:100vh;padding-top:72px;padding-left:64px;position:relative}.studio-app .studio-assistant-main{min-width:0;height:calc(100vh - 72px);overflow:hidden}@media (max-width:768px){.studio-app .studio-assistant{padding-left:0}.studio-app .studio-assistant-main{height:calc(100vh - 72px - 64px - env(safe-area-inset-bottom,0px))}}.studio-app--lesson .studio-rail,.studio-app--lesson .studio-topbar,.studio-app--lesson .studio-rightrail,.studio-app--lesson .studio-bottomnav{display:none!important}.studio-app .studio-lesson-inner{width:100%}.studio-app--lesson{background:var(--studio-bg);min-height:100vh}.studio-app--lesson header.fixed,.studio-app--lesson header[class*=fixed][class*=top-0]{border-bottom:1px solid var(--studio-border-subtle);font-family:var(--studio-font-sans);background:var(--studio-chrome)!important}.studio-app--lesson header[class*=fixed][class*=top-0] button[class*=text-gray-400]{color:var(--studio-text-2)!important}.studio-app--lesson header[class*=fixed][class*=top-0] button[class*=text-gray-400]:hover{color:var(--studio-text-1)!important}.studio-app--lesson header[class*=fixed] div[role=progressbar]{overflow:hidden;background:var(--studio-surface-2)!important;border-radius:999px!important;height:6px!important}.studio-app--lesson header[class*=fixed] div[role=progressbar]>div{background:var(--studio-text-1)!important;border-radius:999px!important}.studio-app--lesson header[class*=fixed] span[class*=text-red-500]{font-family:var(--studio-font-mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--studio-text-1)!important}.studio-app--lesson button[class*="bg-[#58cc02]"],.studio-app--lesson button[class*=bg-green-500],.studio-app--lesson button[class*=bg-green-400],.studio-app--lesson button[class*=bg-blue-600],.studio-app--lesson button[class*=bg-blue-500],.studio-app--lesson button[class*=hover\:brightness-110][class*=bg-\[]{font-family:var(--studio-font-sans);font-weight:500;background:var(--studio-text-1)!important;color:var(--studio-on-brand)!important;text-transform:none!important;letter-spacing:0!important;border-color:#0000!important;border-radius:999px!important}.studio-app--lesson [class*=border-2][class*=border-b-4]{border-width:1px!important;border-radius:16px!important}.studio-app--lesson [class*=border-blue-500],.studio-app--lesson [class*=border-blue-300],.studio-app--lesson [class*="border-[#84d8ff]"],.studio-app--lesson [class*="border-[#84D8FF]"]{border-color:var(--studio-text-1)!important}.studio-app--lesson [class*="bg-[#ddf4ff]"],.studio-app--lesson [class*="bg-[#DDF4FF]"],.studio-app--lesson [class*=bg-blue-50]{background:var(--studio-sand)!important}.studio-app--lesson [class*=text-blue-400],.studio-app--lesson [class*=text-blue-700],.studio-app--lesson [class*="text-[#1cb0f6]"],.studio-app--lesson [class*="text-[#1CB0F6]"]{color:var(--studio-text-1)!important}.studio-app--lesson div[class*=bg-green-100]{border-top:1px solid var(--studio-border-subtle);background:#12a15014!important}.studio-app--lesson div[class*=bg-red-100]{border-top:1px solid var(--studio-border-subtle);background:#c628280f!important}.studio-app--lesson .studio-lesson-inner{padding:0}.studio-app .studio-main{flex-direction:column;min-width:0;display:flex}.studio-app .studio-main-inner{width:100%;max-width:1080px;margin:0 auto;padding:36px 56px 80px}@media (max-width:1180px){.studio-app .studio-main-inner{padding:28px 28px 80px}}.studio-app .studio-rail{border-right:1px solid var(--studio-border-subtle);background:var(--studio-chrome);z-index:1000;flex-direction:column;align-items:center;gap:2px;width:64px;padding:14px 0;display:flex;position:fixed!important;inset:0 auto 0 0!important}.studio-app .studio-rail-logo{cursor:pointer;background:0 0;border:0;place-items:center;width:36px;height:36px;margin-bottom:14px;transition:transform .2s cubic-bezier(.32,.72,0,1);display:grid}.studio-app .studio-rail-logo:hover{transform:rotate(-6deg)}.studio-app .studio-rail-item{width:40px;height:40px;color:var(--studio-text-2);cursor:pointer;background:0 0;border:0;border-radius:14px;place-items:center;transition:background .2s,color .2s,transform .2s,box-shadow .2s;display:grid;position:relative}.studio-app .studio-rail-item:hover{background:var(--studio-tile);color:var(--studio-text-1)}.studio-app .studio-rail-item:active{transform:scale(.95)}.studio-app .studio-rail-item.is-active,.studio-app .studio-rail-item.is-active:hover{background:var(--studio-text-1);color:var(--studio-bg);box-shadow:0 8px 18px -8px #0000008c}.studio-app .studio-rail-tip{pointer-events:none;white-space:nowrap;background:var(--studio-text-1);color:var(--studio-bg);opacity:0;z-index:50;border:0;border-radius:999px;padding:6px 12px;font-size:12.5px;font-weight:500;transition:opacity .2s,transform .2s cubic-bezier(.32,.72,0,1);position:absolute;top:50%;left:calc(100% + 14px);transform:translateY(-50%)translate(-4px);box-shadow:0 6px 16px #0f0f0f2e}.studio-app .studio-rail-item:hover .studio-rail-tip{opacity:1;transform:translateY(-50%)translate(0)}.studio-app .studio-rail-sep{background:var(--studio-border-subtle);width:24px;height:1px;margin:6px 0}.studio-app .studio-rail-avatar{color:#4a2f1a;cursor:pointer;background:linear-gradient(135deg,#e8c4a0,#d4a574);border:0;border-radius:50%;place-items:center;width:32px;height:32px;margin-top:6px;font-size:11.5px;font-weight:600;display:grid}.studio-app .studio-rail-account{position:relative}.studio-app .studio-rail-menu{z-index:1200;border:1px solid var(--studio-border-subtle);background:var(--studio-chrome);transform-origin:0 100%;border-radius:13px;width:244px;padding:6px;animation:.14s cubic-bezier(.32,.72,0,1) 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h2{letter-spacing:-.02em;color:var(--studio-text-1);margin:0;font-size:19px;font-weight:700;line-height:1.2}.studio-app .studio-stat-card p{color:var(--studio-text-2);margin:4px 0 0;font-size:13.5px;line-height:1.45}.studio-app .studio-stat-card-strong{font-weight:600;color:var(--studio-text-1)!important}.studio-app .studio-stat-card-strong span{color:var(--studio-danger)}.studio-app .studio-stat-card-head{align-items:flex-start;gap:12px;display:flex}.studio-app .studio-stat-card-head.is-centered{align-items:center}.studio-app .studio-stat-card-icon{background:var(--studio-surface-2);width:44px;height:44px;color:var(--studio-text-1);border-radius:20px;flex:none;place-items:center;display:grid}.studio-app .studio-stat-card-icon.is-streak{color:var(--studio-warning);background:#d4881f1c}.studio-app .studio-stat-card-icon.is-points{background:var(--studio-brand-soft);color:var(--studio-brand)}.studio-app 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.studio-stat-action strong{align-items:center;gap:7px;display:inline-flex}@media (max-width:768px){.studio-app .studio-stat-dropdown{width:auto;max-height:calc(100vh - 160px);top:80px;left:10px;right:10px}.studio-app .studio-stat-card{padding:16px}}.studio-app .studio-bottomnav{display:none}@media (max-width:768px){.studio-app .studio-bottomnav{z-index:1000;background:var(--studio-chrome);border-top:1px solid var(--studio-border-subtle);padding-bottom:env(safe-area-inset-bottom,0px);display:block;position:fixed!important;bottom:0!important;left:0!important;right:0!important}.studio-app .studio-bottomnav ul{grid-template-columns:repeat(5,1fr);height:64px;margin:0;padding:0;list-style:none;display:grid}.studio-app .studio-bottomnav li{display:flex}.studio-app .studio-bottomnav-item{color:var(--studio-text-2);letter-spacing:.01em;-webkit-tap-highlight-color:transparent;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:3px;font-size:10.5px;font-weight:500;text-decoration:none;transition:color .15s;display:inline-flex}.studio-app .studio-bottomnav-item:hover,.studio-app .studio-bottomnav-item.is-active{color:var(--studio-text-1)}.studio-app .studio-bottomnav-item.is-active:before{content:"";background:var(--studio-text-1);border-radius:0 0 2px 2px;width:28px;height:2px;position:absolute;top:0}.studio-app .studio-bottomnav-item{position:relative}}.studio-app .studio-rightrail{z-index:998;border-left:1px solid var(--studio-border-subtle);background:var(--studio-chrome);flex-direction:column;width:320px;display:flex;overflow:hidden;position:fixed!important;inset:72px 0 0 auto!important}.studio-app .studio-rr-head{border-bottom:1px solid var(--studio-border-subtle);flex-shrink:0;justify-content:space-between;align-items:center;gap:8px;height:72px;padding:0 16px;display:flex}.studio-app .studio-rr-head h3{letter-spacing:-.005em;margin:0;font-size:13px;font-weight:600}.studio-app .studio-rr-tabs{background:var(--studio-surface-2);border:1px solid var(--studio-border-subtle);border-radius:8px;align-items:center;gap:1px;padding:2px;display:inline-flex}.studio-app .studio-rr-tabs button{color:var(--studio-text-2);cursor:pointer;background:0 0;border:0;border-radius:6px;padding:3px 8px;font-size:11.5px;font-weight:500}.studio-app .studio-rr-tabs button.is-on{background:var(--studio-surface);color:var(--studio-text-1);box-shadow:0 1px 2px #0f0f0f0a}.studio-app .studio-rr-scroll{flex-direction:column;flex:1;gap:18px;padding:18px;display:flex;overflow-y:auto}.studio-app .studio-rr-foot{border-top:1px solid var(--studio-border-subtle);flex-shrink:0;align-items:center;gap:10px;padding:12px 18px;display:flex}.studio-app 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.studio-rr-row .studio-rr-ico{background:var(--sb-tile-chip);width:30px;height:30px;color:var(--studio-text-2);border-radius:10px;flex-shrink:0;place-items:center;display:grid}.studio-app .studio-rr-row .studio-rr-body{flex:1;min-width:0}.studio-app .studio-rr-row .studio-rr-body .studio-rr-t{letter-spacing:-.005em;text-overflow:ellipsis;white-space:nowrap;font-size:12.5px;font-weight:500;overflow:hidden}.studio-app .studio-rr-row .studio-rr-body .studio-rr-s{color:var(--studio-text-3);font-size:11px;font-family:var(--studio-font-mono);margin-top:2px}.studio-app .studio-rr-quest{padding:10px}.studio-app .studio-rr-quest .studio-rr-head-row{align-items:center;gap:10px;margin-bottom:8px;display:flex}.studio-app .studio-rr-quest .studio-rr-head-row .studio-rr-t{letter-spacing:-.005em;font-size:12.5px;font-weight:500}.studio-app .studio-rr-meter{align-items:center;gap:8px;display:flex}.studio-app .studio-rr-meter .studio-rr-bar{background:color-mix(in srgb, var(--studio-text-1) 9%, 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.studio-page-h{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:36px;padding-bottom:0;display:flex}.studio-app .studio-page-h>div:first-child{flex:280px;min-width:0}.studio-app .studio-page-h h1{font-family:var(--studio-font-serif);letter-spacing:-.03em;margin:0;font-size:44px;font-weight:300;line-height:1.05}@media (max-width:640px){.studio-app .studio-page-h h1{font-size:34px}}.studio-app .studio-page-h p{color:var(--studio-text-3);max-width:560px;margin:6px 0 0;font-size:14px}.studio-app .studio-card{background:var(--sb-tile);border-radius:var(--sb-tile-r,24px);border:0;overflow:hidden}.studio-app .studio-card-head{justify-content:space-between;align-items:center;padding:18px 22px 12px;display:flex}.studio-app .studio-card-head h3{letter-spacing:-.005em;margin:0;font-size:14px;font-weight:600}.studio-app .studio-label{text-transform:uppercase;letter-spacing:.1em;color:var(--studio-text-3);font-size:12px;font-weight:500}.studio-app 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