:root{--gy-red:#e63946;--gy-red-hover:#d72b38;--gy-red-press:#b91c2a;--gy-red-wash:rgba(230,57,70,.1);--gy-red-wash-strong:rgba(230,57,70,.18);--gy-red-glow:rgba(230,57,70,.3);--l-bg:#fbf9f5;--l-bg-alt:#f5f2ec;--l-card:#fff;--l-card-sunk:#f0ede6;--l-card-hover:#faf8f3;--l-ink:#171512;--l-ink-2:#3e3a33;--l-ink-3:#6e6a62;--l-ink-4:#a39e93;--l-rule:rgba(23,21,18,.08);--l-rule-strong:rgba(23,21,18,.14);--l-shadow-sm:0 1px 2px rgba(23,21,18,.04),0 0 0 1px rgba(23,21,18,.04);--l-shadow-md:0 4px 16px rgba(23,21,18,.06),0 0 0 1px rgba(23,21,18,.04);--l-shadow-lg:0 16px 40px rgba(23,21,18,.1),0 0 0 1px rgba(23,21,18,.05);--l-shadow-xl:0 32px 80px rgba(23,21,18,.16);--d-bg:#13110e;--d-bg-alt:#1a1814;--d-card:#1f1d18;--d-card-sunk:#17150f;--d-card-hover:#25221c;--d-ink:#f5f1e8;--d-ink-2:#cac3b5;--d-ink-3:#8a8374;--d-ink-4:#5a5447;--d-rule:hsla(42,39%,94%,.08);--d-rule-strong:hsla(42,39%,94%,.16);--ok:#0f8a4f;--ok-wash:rgba(15,138,79,.1);--warn:#c97a10;--warn-wash:rgba(201,122,16,.1);--err:#c02b2b;--err-wash:rgba(192,43,43,.1);--srs-again:var(--err);--srs-again-wash:var(--err-wash);--srs-hard:var(--warn);--srs-hard-wash:var(--warn-wash);--srs-good:var(--ok);--srs-good-wash:var(--ok-wash);--cat-upsc:#2e63c4;--cat-neet:#1f8b4c;--cat-ssc:#e63946;--cat-pcsj:#b9357a;--cat-ugc:#c97a10;--cat-cat:#6e3cc9;--accent-gold:#9c7a24;--accent-gold-wash:rgba(156,122,36,.14);--f-sans:var(--font-body),-apple-system,BlinkMacSystemFont,system-ui,sans-serif;--f-display:var(--font-display),Georgia,serif;--f-serif:"Fraunces","Charter","Iowan Old Style",Georgia,serif;--f-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,monospace;--fs-display:44px;--fs-h1:32px;--fs-h2:24px;--fs-h3:20px;--fs-title:17px;--fs-body:15px;--fs-sm:13px;--fs-xs:11px;--lh-tight:1.08;--lh-snug:1.25;--lh-normal:1.5;--lh-relaxed:1.65;--tr-tight:-0.02em;--tr-snug:-0.01em;--tr-normal:0;--tr-caps:0.08em;--fw-r:400;--fw-m:500;--fw-s:600;--fw-b:700;--r-xs:6px;--r-sm:10px;--r-md:14px;--r-lg:20px;--r-xl:28px;--r-pill:999px;--s-1:4px;--s-2:8px;--s-3:12px;--s-4:16px;--s-5:20px;--s-6:24px;--s-7:32px;--s-8:40px;--s-9:56px;--s-10:72px;--ms-fast:140ms;--ms-norm:220ms;--ms-slow:340ms;--ms-xslow:480ms;--ease-out:cubic-bezier(0.2,0.8,0.25,1);--ease-in-out:cubic-bezier(0.65,0,0.35,1);--ease-spring:cubic-bezier(0.34,1.2,0.64,1)}.light,:root{--bg:var(--l-bg);--bg-alt:var(--l-bg-alt);--card:var(--l-card);--card-sunk:var(--l-card-sunk);--card-hover:var(--l-card-hover);--ink:var(--l-ink);--ink-2:var(--l-ink-2);--ink-3:var(--l-ink-3);--ink-4:var(--l-ink-4);--rule:var(--l-rule);--rule-strong:var(--l-rule-strong);--shadow-sm:var(--l-shadow-sm);--shadow-md:var(--l-shadow-md);--shadow-lg:var(--l-shadow-lg);--shadow-xl:var(--l-shadow-xl);--bg-rgb:251 249 245;--ink-rgb:23 21 18}.dark{--bg:var(--d-bg);--bg-alt:var(--d-bg-alt);--card:var(--d-card);--card-sunk:var(--d-card-sunk);--card-hover:var(--d-card-hover);--ink:var(--d-ink);--ink-2:var(--d-ink-2);--ink-3:var(--d-ink-3);--ink-4:var(--d-ink-4);--rule:var(--d-rule);--rule-strong:var(--d-rule-strong);--shadow-sm:0 1px 2px rgba(0,0,0,.5),0 0 0 1px hsla(0,0%,100%,.04);--shadow-md:0 4px 16px rgba(0,0,0,.5),0 0 0 1px hsla(0,0%,100%,.04);--shadow-lg:0 16px 40px rgba(0,0,0,.6),0 0 0 1px hsla(0,0%,100%,.05);--shadow-xl:0 32px 80px rgba(0,0,0,.7);--bg-rgb:19 17 14;--ink-rgb:245 241 232}body,html{font-family:var(--f-sans);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--rule-strong);border-radius:999px}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;transition-duration:.01ms!important}}.react-pdf__Page__textContent{position:absolute;top:0;left:0;right:0;bottom:0;overflow:hidden;opacity:.2;line-height:1}.react-pdf__Page__textContent span{color:transparent;position:absolute;white-space:pre;cursor:text;transform-origin:0 0}.react-pdf__Page__textContent ::selection{background-color:rgba(59,130,246,.85)!important;color:rgba(0,0,0,.95)!important}.react-pdf__Page__textContent ::-moz-selection{background-color:rgba(59,130,246,.85)!important;color:rgba(0,0,0,.95)!important}.dark .react-pdf__Page__textContent ::selection{background-color:rgba(96,165,250,.85)!important;color:#fff!important}.dark .react-pdf__Page__textContent ::-moz-selection{background-color:rgba(96,165,250,.85)!important;color:#fff!important}.react-pdf__Page__annotations{position:absolute;top:0;left:0;right:0;bottom:0}.rpv-core__toolbar{background-color:#f9fafb!important;border-color:#e5e7eb!important}.dark .rpv-core__toolbar{background-color:#334155!important;border-color:#475569!important;color:#fff!important}.rpv-core__toolbar-button{color:#4b5563!important}.dark .rpv-core__toolbar-button{color:#cbd5e1!important}.rpv-core__toolbar-button:hover{background-color:#e5e7eb!important;color:#111827!important}.dark .rpv-core__toolbar-button:hover{background-color:#475569!important;color:#fff!important}.rpv-core__toolbar-input{background-color:#fff!important;border-color:#e5e7eb!important;color:#111827!important}.dark .rpv-core__toolbar-input{background-color:#1e293b!important;border-color:#475569!important;color:#fff!important}.rpv-core__viewer{background-color:#f9fafb!important}.dark .rpv-core__viewer{background-color:#1e293b!important}.dark .rpv-core__page-layer,.rpv-core__page-layer{background-color:#fff!important}.rpv-core__text-layer .rpv-core__text-layer--selected{background-color:rgba(59,130,246,.3)!important}.rpv-core__spinner{border-color:#3b82f6!important}.rpv-core__inner-pages::-webkit-scrollbar{width:8px;height:8px}.rpv-core__inner-pages::-webkit-scrollbar-track{background:#f9fafb}.dark .rpv-core__inner-pages::-webkit-scrollbar-track{background:#1e293b}.rpv-core__inner-pages::-webkit-scrollbar-thumb{background:#9ca3af;border-radius:4px}.dark .rpv-core__inner-pages::-webkit-scrollbar-thumb{background:#475569}.rpv-core__inner-pages::-webkit-scrollbar-thumb:hover{background:#6b7280}.dark .rpv-core__inner-pages::-webkit-scrollbar-thumb:hover{background:#64748b}.feynman-practice-modal{border-radius:28px;--tw-shadow:0 25px 50px -12px rgba(0,0,0,.25);--tw-shadow-colored:0 25px 50px -12px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000),var(--tw-ring-shadow,0 0 #0000),var(--tw-shadow);--tw-ring-offset-shadow:var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);--tw-ring-shadow:var(--tw-ring-inset) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color);box-shadow:var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow,0 0 #0000);--tw-ring-color:rgba(0,0,0,.05)}.feynman-practice-modal:is(.dark *){--tw-ring-color:hsla(0,0%,100%,.1)}.feynman-practice-modal{background-color:var(--card)}.feynman-practice-header{background-image:linear-gradient(to right,var(--tw-gradient-stops));--tw-gradient-from:#9333ea var(--tw-gradient-from-position);--tw-gradient-to:rgba(147,51,234,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:#4f46e5 var(--tw-gradient-to-position);--tw-text-opacity:1;color:rgb(255 255 255/var(--tw-text-opacity,1))}.feynman-explanation-input{width:100%;resize:none;border-radius:20px;padding:1rem}.feynman-explanation-input:focus{border-color:transparent;--tw-ring-offset-shadow:var(--tw-ring-inset) 0 0 0 var(--tw-ring-offset-width) var(--tw-ring-offset-color);--tw-ring-shadow:var(--tw-ring-inset) 0 0 0 calc(2px + var(--tw-ring-offset-width)) var(--tw-ring-color);box-shadow:var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow,0 0 #0000);--tw-ring-opacity:1;--tw-ring-color:rgb(168 85 247/var(--tw-ring-opacity,1))}.feynman-explanation-input{background-color:var(--card-sunk);border:1px solid var(--rule-strong);color:var(--ink)}.feynman-explanation-input::-moz-placeholder{color:var(--ink-4)}.feynman-explanation-input::placeholder{color:var(--ink-4)}.feynman-mode-toggle{display:flex;align-items:center;gap:.5rem;border-radius:20px;padding:.25rem;background-color:var(--card-sunk)}.feynman-mode-toggle button{display:flex;align-items:center;gap:.5rem;border-radius:14px;padding:.5rem .75rem;font-size:.875rem;line-height:1.25rem;font-weight:500;transition-property:color,background-color,border-color,text-decoration-color,fill,stroke;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}.feynman-mode-toggle button.active{--tw-shadow:var(--shadow-sm);--tw-shadow-colored:var(--shadow-sm);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000),var(--tw-ring-shadow,0 0 #0000),var(--tw-shadow);background-color:var(--card);color:var(--ink)}.feynman-mode-toggle button.inactive{color:var(--ink-3)}.feynman-mode-toggle button.inactive:hover{color:var(--ink)}.feynman-recording-area{display:flex;flex-direction:column;align-items:center}.feynman-recording-area>:not([hidden])~:not([hidden]){--tw-space-y-reverse:0;margin-top:calc(1rem * calc(1 - var(--tw-space-y-reverse)));margin-bottom:calc(1rem * var(--tw-space-y-reverse))}.feynman-recording-area{border-radius:20px;border-width:2px;border-style:dashed;padding:1.5rem;border-color:var(--rule-strong);background-color:var(--card-sunk)}.feynman-recording-button{border-radius:9999px;padding:1rem;transition-property:color,background-color,border-color,text-decoration-color,fill,stroke;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}@keyframes pulse{50%{opacity:.5}}.feynman-recording-button.recording{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite;--tw-bg-opacity:1;background-color:rgb(239 68 68/var(--tw-bg-opacity,1))}.feynman-recording-button.ready{--tw-bg-opacity:1;background-color:rgb(168 85 247/var(--tw-bg-opacity,1))}.feynman-recording-button.ready:hover{--tw-bg-opacity:1;background-color:rgb(147 51 234/var(--tw-bg-opacity,1))}.feynman-score-display{display:inline-flex;align-items:center;gap:.75rem;border-radius:28px;padding:1rem 1.5rem;--tw-text-opacity:1;color:rgb(255 255 255/var(--tw-text-opacity,1))}.feynman-score-excellent{--tw-gradient-from:#22c55e var(--tw-gradient-from-position);--tw-gradient-to:rgba(34,197,94,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:#10b981 var(--tw-gradient-to-position)}.feynman-score-excellent,.feynman-score-good{background-image:linear-gradient(to right,var(--tw-gradient-stops))}.feynman-score-good{--tw-gradient-from:#eab308 var(--tw-gradient-from-position);--tw-gradient-to:rgba(234,179,8,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:#f97316 var(--tw-gradient-to-position)}.feynman-score-practice{background-image:linear-gradient(to right,var(--tw-gradient-stops));--tw-gradient-from:#ef4444 var(--tw-gradient-from-position);--tw-gradient-to:rgba(239,68,68,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:#ec4899 var(--tw-gradient-to-position)}.feynman-assessment-grid{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:1rem}@media (min-width:768px){.feynman-assessment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.feynman-assessment-item{display:flex;align-items:center;justify-content:space-between;border-radius:20px;padding:.75rem;background-color:var(--card-sunk);border:1px solid var(--rule)}.feynman-knowledge-gap{display:flex;align-items:flex-start;gap:.5rem;border-radius:20px;border-width:1px;--tw-border-opacity:1;border-color:rgb(254 215 170/var(--tw-border-opacity,1));--tw-bg-opacity:1;background-color:rgb(255 247 237/var(--tw-bg-opacity,1));padding:.75rem}.feynman-knowledge-gap:is(.dark *){--tw-border-opacity:1;border-color:rgb(154 52 18/var(--tw-border-opacity,1));background-color:rgba(124,45,18,.2)}.feynman-followup-question{border-radius:20px;border-width:1px;--tw-border-opacity:1;border-color:rgb(199 210 254/var(--tw-border-opacity,1));--tw-bg-opacity:1;background-color:rgb(238 242 255/var(--tw-bg-opacity,1));padding:1rem}.feynman-followup-question:is(.dark *){--tw-border-opacity:1;border-color:rgb(55 48 163/var(--tw-border-opacity,1));background-color:rgba(49,46,129,.2)}.feynman-document-stats{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));gap:1rem}@media (min-width:768px){.feynman-document-stats{grid-template-columns:repeat(3,minmax(0,1fr))}}.feynman-document-stat{border-radius:20px;padding:.75rem;text-align:center;background-color:var(--card-sunk)}.feynman-action-buttons{display:flex;align-items:center;justify-content:space-between;padding-top:1rem;border-top:1px solid var(--rule-strong)}.feynman-fade-in{animation:feynmanFadeIn .3s ease-out}.feynman-slide-up{animation:feynmanSlideUp .4s ease-out}.feynman-scale-in{animation:feynmanScaleIn .2s ease-out}@keyframes feynmanFadeIn{0%{opacity:0}to{opacity:1}}@keyframes feynmanSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes feynmanScaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.feynman-recording-pulse{position:relative}.feynman-recording-pulse:before{content:"";position:absolute;top:-4px;left:-4px;right:-4px;bottom:-4px;border:2px solid rgba(239,68,68,.5);border-radius:50%;animation:feynmanPulse 1.5s infinite}@keyframes feynmanPulse{0%{transform:scale(1);opacity:1}to{transform:scale(1.2);opacity:0}}.feynman-context-info{border-radius:20px;padding:1rem;background-color:var(--card-sunk);border:1px solid var(--rule)}.feynman-context-label{margin-bottom:.5rem;display:flex;align-items:center;gap:.5rem;font-size:.875rem;line-height:1.25rem;font-weight:500;color:var(--ink-3)}.feynman-context-text{font-size:.875rem;line-height:1.25rem;line-height:1.625;color:var(--ink-2)}.feynman-instructions{border-radius:20px;border-width:1px;--tw-border-opacity:1;border-color:rgb(233 213 255/var(--tw-border-opacity,1));background-image:linear-gradient(to right,var(--tw-gradient-stops));--tw-gradient-from:#faf5ff var(--tw-gradient-from-position);--tw-gradient-to:rgba(250,245,255,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:#eef2ff var(--tw-gradient-to-position);padding:1rem}.feynman-instructions:is(.dark *){--tw-border-opacity:1;border-color:rgb(107 33 168/var(--tw-border-opacity,1));--tw-gradient-from:rgba(88,28,135,.2) var(--tw-gradient-from-position);--tw-gradient-to:rgba(88,28,135,0) var(--tw-gradient-to-position);--tw-gradient-stops:var(--tw-gradient-from),var(--tw-gradient-to);--tw-gradient-to:rgba(49,46,129,.2) var(--tw-gradient-to-position)}.feynman-instructions-header{display:flex;align-items:flex-start;gap:.75rem}.feynman-instructions-icon{margin-top:.125rem;border-radius:20px;--tw-bg-opacity:1;background-color:rgb(147 51 234/var(--tw-bg-opacity,1));padding:.375rem}.feynman-instructions-content h3{margin-bottom:.25rem;font-weight:600;color:var(--ink)}.feynman-instructions-content p{font-size:.875rem;line-height:1.25rem;color:var(--ink-3)}@media (max-width:768px){.feynman-practice-modal{margin-left:.5rem;margin-right:.5rem;max-width:100%}.feynman-assessment-grid,.feynman-document-stats{grid-template-columns:repeat(1,minmax(0,1fr))}.feynman-action-buttons{flex-direction:column;gap:.75rem}.feynman-action-buttons>*{width:100%}}