@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400..800;1,400..800&display=swap";:root{--bg-base:#09090b;--bg-raised:#0f0f12;--bg-surface:#141418;--bg-elevated:#1a1a1f;--bg-input:#121215;--text-primary:#f4f4f5;--text-secondary:#a1a1aa;--text-muted:#71717a;--accent:#3b82f6;--accent-muted:#3b82f624;--accent-border:#3b82f659;--accent-glow:#3b82f61f;--success:#34d399;--success-bg:#34d39914;--error:#f87171;--error-bg:#f8717114;--warning:#fbbf24;--warning-bg:#fbbf2414;--border:#ffffff0e;--border-strong:#ffffff1a;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:20px;--radius-full:9999px;--font:"Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--ease-out-expo:cubic-bezier(.16, 1, .3, 1);--ease-spring:cubic-bezier(.34, 1.56, .64, 1);--transition-fast:.12s ease;--transition-base:.2s ease;--shadow-sm:0 1px 2px #0006;--shadow-md:0 8px 24px #00000059}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:17px}body{font-family:var(--font);font-optical-sizing:auto;background:var(--bg-base);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;line-height:1.62}#root{width:100%;min-width:0;min-height:100vh;display:flex}a{color:var(--accent);transition:color var(--transition-fast);text-decoration:none}a:hover{color:#60a5fa}.app-layout{width:100%;min-height:100dvh;display:flex}.main-shell{flex-direction:column;flex:1;min-width:0;min-height:100dvh;margin-left:244px;display:flex}.main-content{flex:1;width:100%;max-width:1120px;margin:0 auto;padding:32px 44px 52px;position:relative}.app-header{z-index:50;-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#09090bd1;flex-shrink:0;justify-content:flex-start;align-items:center;gap:16px;min-height:56px;padding:12px 24px 12px 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0;border:none;justify-content:center;align-items:center;display:flex}.drawer-panel__close:hover{background:var(--bg-surface);color:var(--text-primary)}.drawer-panel__nav{flex-direction:column;flex:1;gap:2px;padding:12px;display:flex;overflow-y:auto}.drawer-nav-link{border-radius:var(--radius-md);color:var(--text-secondary);transition:background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);border:1px solid #0000;align-items:center;gap:12px;padding:12px 14px;font-size:14px;font-weight:520;display:flex}.drawer-nav-link:hover{background:var(--bg-surface);color:var(--text-primary)}.drawer-nav-link--active{background:var(--accent-muted);color:var(--text-primary);border-color:var(--accent-border)}.drawer-nav-link__icon{color:var(--text-muted);display:flex}.drawer-nav-link--active .drawer-nav-link__icon{color:var(--accent)}.drawer-panel__note{color:var(--text-muted);border-top:1px solid var(--border);padding:14px 18px 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var(--border);border-radius:var(--radius-lg);transition:border-color .35s var(--ease-out-expo), box-shadow .45s var(--ease-out-expo), transform .45s var(--ease-spring);padding:26px}.card:hover{border-color:#3b82f647;transform:translateY(-5px);box-shadow:0 20px 50px #0000006b,0 0 0 1px #3b82f61a}.card-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;display:grid}.stats-row{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:28px;display:grid}.stat-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);transition:border-color .35s var(--ease-out-expo), box-shadow .4s var(--ease-out-expo), transform .4s var(--ease-spring);align-items:flex-start;gap:14px;padding:20px 22px;display:flex}.stat-card:hover{border-color:#ffffff1f;transform:translateY(-3px);box-shadow:0 14px 36px #00000061}.stat-card-icon{border-radius:var(--radius-md);border:1px solid 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var(--border);border-radius:var(--radius-md);width:100%;color:var(--text-primary);font-family:var(--font);transition:border-color var(--transition-fast), box-shadow var(--transition-fast);outline:none;padding:11px 14px;font-size:14px}.input:focus,.select:focus,.textarea:focus{border-color:var(--accent-border);box-shadow:0 0 0 3px var(--accent-glow)}.input::placeholder,.textarea::placeholder{color:var(--text-muted)}.textarea{resize:vertical;min-height:100px}.form-group{margin-bottom:16px}.form-label{color:var(--text-muted);letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px;font-size:12px;font-weight:600;display:block}.upload-zone{border:1px dashed var(--border-strong);border-radius:var(--radius-lg);text-align:center;cursor:pointer;transition:border-color var(--transition-base), background var(--transition-base);background:var(--bg-surface);padding:48px 32px;position:relative}.upload-zone:hover,.upload-zone.dragover{border-color:var(--accent-border);background:var(--accent-muted)}.upload-zone-icon-wrap{border-radius:var(--radius-lg);background:var(--bg-elevated);border:1px solid var(--border);width:56px;height:56px;color:var(--text-secondary);justify-content:center;align-items:center;margin:0 auto 16px;display:flex}.upload-zone h3{letter-spacing:-.02em;margin-bottom:6px;font-size:16px;font-weight:600}.upload-zone p{color:var(--text-muted);font-size:13px}.quiz-container{max-width:640px}.quiz-progress{align-items:center;gap:12px;margin-bottom:20px;display:flex}.quiz-progress-bar{background:var(--bg-elevated);border-radius:var(--radius-full);flex:1;height:4px;overflow:hidden}.quiz-progress-fill{background:var(--accent);border-radius:var(--radius-full);height:100%;transition:width 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16px}.quiz-option:hover{border-color:var(--accent-border);background:var(--accent-muted)}.quiz-option.selected{border-color:var(--accent);background:var(--accent-muted)}.quiz-option.correct{border-color:var(--success);background:var(--success-bg)}.quiz-option.incorrect{border-color:var(--error);background:var(--error-bg)}.flashcard-viewer{flex-direction:column;align-items:center;gap:22px;display:flex}.flashcard{perspective:1200px;cursor:pointer;width:100%;max-width:480px;height:280px}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;border-radius:var(--radius-xl);border:1px solid var(--border);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:28px;display:flex;position:absolute;inset:0}.flashcard-front{background:var(--bg-surface)}.flashcard-back{background:var(--bg-elevated);transform:rotateY(180deg)}.flashcard-label{text-transform:uppercase;letter-spacing:.12em;color:var(--text-muted);margin-bottom:14px;font-size:10px;font-weight:600}.flashcard-text{letter-spacing:-.02em;font-size:18px;font-weight:600;line-height:1.45}.flashcard-back .flashcard-text{color:var(--text-secondary);font-size:15px;font-weight:450}.flashcard-nav{align-items:center;gap:18px;display:flex}.flashcard-counter{color:var(--text-muted);text-align:center;font-variant-numeric:tabular-nums;min-width:72px;font-size:13px}.chat-container{flex-direction:column;max-width:720px;height:calc(100vh - 148px);display:flex}.chat-messages{flex-direction:column;flex:1;gap:14px;padding:12px 0 8px;display:flex;overflow-y:auto}.chat-message{gap:10px;max-width:88%;animation:.25s fadeInUp;display:flex}.chat-message.user{flex-direction:row-reverse;align-self:flex-end}.chat-avatar{border-radius:var(--radius-full);border:1px solid var(--border);background:var(--bg-surface);width:32px;height:32px;color:var(--text-muted);flex-shrink:0;justify-content:center;align-items:center;display:flex}.chat-message.user .chat-avatar{background:var(--bg-elevated)}.chat-message.assistant .chat-avatar{color:var(--accent);background:var(--accent-muted);border-color:var(--accent-border)}.chat-bubble{border-radius:var(--radius-lg);padding:11px 15px;font-size:14px;line-height:1.55}.chat-message.assistant .chat-bubble{background:var(--bg-surface);border:1px solid var(--border)}.chat-message.user .chat-bubble{background:var(--accent);color:#fff;border:1px solid #0000}.chat-input-row{border-top:1px solid var(--border);gap:10px;padding-top:16px;display:flex}.chat-input-row .input{flex:1}.demo-hero{border-bottom:1px solid var(--border);margin-bottom:28px;padding:8px 0 28px}.demo-hero h1{letter-spacing:-.04em;color:var(--text-primary);margin-bottom:8px;font-size:28px;font-weight:650}.demo-hero p{color:var(--text-secondary);max-width:56ch;font-size:15px}.demo-steps{flex-wrap:wrap;gap:8px;margin-bottom:28px;display:flex}.demo-step{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-full);cursor:pointer;transition:border-color var(--transition-fast), background var(--transition-fast);color:var(--text-secondary);align-items:center;gap:10px;padding:8px 14px 8px 8px;font-size:13px;font-weight:550;display:inline-flex}.demo-step:hover{border-color:var(--border-strong);color:var(--text-primary)}.demo-step.active{border-color:var(--accent-border);background:var(--accent-muted);color:var(--text-primary)}.demo-step-num{border-radius:var(--radius-full);background:var(--bg-elevated);border:1px solid var(--border);width:26px;height:26px;color:var(--text-muted);font-variant-numeric:tabular-nums;justify-content:center;align-items:center;font-size:12px;font-weight:650;display:flex}.demo-step.active .demo-step-num{background:var(--accent);border-color:var(--accent);color:#fff}.demo-panel{background:0 0;min-height:0;padding:0;animation:.35s fadeInUp}.demo-panel h2{letter-spacing:-.02em;margin-bottom:6px;font-size:18px;font-weight:600}.demo-split{grid-template-columns:1fr 1fr;gap:16px;display:grid}@media (width<=768px){.demo-split{grid-template-columns:1fr}}.demo-code-block{background:var(--bg-base);border-radius:var(--radius-md);max-height:300px;color:var(--text-secondary);border:1px solid var(--border);padding:14px;font-size:12px;line-height:1.65;overflow:auto}.doc-item{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);transition:border-color var(--transition-fast);justify-content:space-between;align-items:center;gap:16px;padding:14px 18px;display:flex}.doc-item:hover{border-color:var(--border-strong)}.doc-item-left{align-items:center;gap:12px;min-width:0;display:flex}.doc-icon{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius-sm);width:38px;height:38px;color:var(--text-muted);flex-shrink:0;justify-content:center;align-items:center;display:flex}.doc-item-info{min-width:0}.doc-item-info h4{letter-spacing:-.02em;white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.doc-item-info p{color:var(--text-muted);margin-top:2px;font-size:12px}.doc-item-actions{flex-shrink:0;gap:8px;display:flex}.badge{border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.06em;align-items:center;padding:3px 9px;font-size:10px;font-weight:600;display:inline-flex}.badge-purple{background:var(--accent-muted);color:#93c5fd;border:1px solid var(--accent-border)}.badge-green{background:var(--success-bg);color:var(--success);border:1px solid #34d39940}.badge-amber{background:var(--warning-bg);color:var(--warning);border:1px solid #fbbf2440}.spinner{border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:22px;height:22px;animation:.7s linear infinite spin}.loading-overlay{color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:48px;display:flex}.loading-overlay .spinner{width:36px;height:36px}.score-display{text-align:center;padding:32px}.score-circle{font-variant-numeric:tabular-nums;border:2px solid;border-radius:50%;justify-content:center;align-items:center;width:100px;height:100px;margin:0 auto 16px;font-size:28px;font-weight:650;display:flex}.score-circle.good{border-color:var(--success);color:var(--success);background:var(--success-bg)}.score-circle.ok{border-color:var(--warning);color:var(--warning);background:var(--warning-bg)}.score-circle.bad{border-color:var(--error);color:var(--error);background:var(--error-bg)}.callout{border-radius:var(--radius-md);align-items:flex-start;gap:10px;padding:14px 16px;font-size:14px;line-height:1.45;display:flex}.callout-error{background:var(--error-bg);color:var(--error);border:1px solid #f8717133}.callout-error .callout-icon{flex-shrink:0;margin-top:1px}.callout-success{background:var(--success-bg);color:var(--success);border:1px solid #34d39933}@keyframes fadeInUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}.animate-in{animation:.35s fadeInUp}.empty-state{text-align:center;color:var(--text-muted);border:1px dashed var(--border);border-radius:var(--radius-lg);background:var(--bg-surface);padding:56px 24px}.empty-state-visual{border-radius:var(--radius-md);background:var(--bg-elevated);border:1px solid var(--border);width:48px;height:48px;color:var(--text-muted);justify-content:center;align-items:center;margin:0 auto 16px;display:flex}.empty-state h3{color:var(--text-secondary);margin-bottom:6px;font-size:16px;font-weight:600}.empty-state p{font-size:14px}.stack-gap{flex-direction:column;gap:10px;display:flex}.inline-row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.muted{color:var(--text-muted);font-size:14px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media (width<=900px){.sidebar--desktop{display:none}.main-shell{margin-left:0}.main-content{padding:20px 18px calc(88px + env(safe-area-inset-bottom,0));max-width:none}.app-header{padding-left:8px;padding-right:14px}.app-header__menu-btn{display:inline-flex}.mobile-tab-bar{display:flex}.card-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2,1fr)}.chat-container{height:min(480px, calc(100dvh - 220px - env(safe-area-inset-bottom,0)))}}@media (width<=520px){.stats-row{grid-template-columns:1fr}.doc-item{flex-direction:column;align-items:stretch}.doc-item-actions{justify-content:flex-end}}.landing{width:100%;color:var(--text-primary);font-family:var(--font);position:relative;overflow:hidden}.landing-bg{z-index:0;background:var(--bg-base);pointer-events:none;position:fixed;inset:0}.landing-bg__grid{opacity:.85;background-image:linear-gradient(#3b82f60b 1px,#0000 1px),linear-gradient(90deg,#3b82f60b 1px,#0000 1px);background-size:72px 72px;animation:32s linear infinite landing-grid-pan;position:absolute;inset:-40%}.landing-bg__orb{filter:blur(88px);opacity:.5;border-radius:50%;animation:16s ease-in-out infinite landing-orb-float;position:absolute}.landing-bg__orb--1{background:#3b82f661;width:460px;height:460px;top:-140px;right:-100px}.landing-bg__orb--2{background:#6366f147;width:380px;height:380px;animation-duration:19s;animation-delay:-6s;bottom:8%;left:-120px}.landing-bg__orb--3{background:#22d3ee2e;width:300px;height:300px;animation-duration:22s;animation-delay:-9s;top:42%;right:12%}@keyframes landing-grid-pan{0%{transform:translate(0)}to{transform:translate(-72px,-72px)}}@keyframes landing-orb-float{0%,to{transform:translate(0)scale(1)}50%{transform:translate(32px,-28px)scale(1.06)}}@keyframes landing-fade-down{0%{opacity:0;transform:translateY(-18px)}to{opacity:1;transform:translateY(0)}}@keyframes landing-fade-up{0%{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}.landing-nav{z-index:2;max-width:1220px;animation:landing-fade-down .85s var(--ease-out-expo) backwards;justify-content:space-between;align-items:center;gap:24px;margin:0 auto;padding:24px 36px;display:flex;position:relative}.landing-nav__brand{color:var(--text-primary);letter-spacing:-.035em;align-items:center;gap:12px;font-size:19px;font-weight:700;text-decoration:none;transition:opacity .2s;display:flex}.landing-nav__brand:hover{opacity:.9;color:var(--text-primary)}.landing-nav__title{line-height:1}.landing-nav__mark{border-radius:var(--radius-md);background:var(--bg-surface);border:1px solid var(--border);width:44px;height:44px;color:var(--accent);transition:border-color .35s ease, box-shadow .4s ease, transform .4s var(--ease-spring);justify-content:center;align-items:center;display:flex}.landing-nav__brand:hover .landing-nav__mark{border-color:var(--accent-border);box-shadow:0 0 32px var(--accent-glow);transform:scale(1.05)rotate(-2deg)}.landing-nav__links{flex-wrap:wrap;align-items:center;gap:10px 28px;display:flex}.landing-nav__link{color:var(--text-secondary);padding:8px 2px;font-size:16px;font-weight:550;transition:color .2s}.landing-nav__link:hover{color:var(--text-primary)}.landing-nav__cta{border-radius:var(--radius-md);background:var(--accent);transition:transform .3s var(--ease-spring), box-shadow .35s ease, background .25s ease;align-items:center;padding:11px 22px;font-size:16px;font-weight:650;display:inline-flex;box-shadow:0 4px 22px #3b82f659;color:#fff!important}.landing-nav__cta:hover{background:#2563eb;transform:translateY(-2px);box-shadow:0 10px 32px #3b82f66b;color:#fff!important}.landing-main{z-index:1;max-width:1220px;margin:0 auto;padding:0 36px 40px;position:relative}.landing-hero{max-width:840px;padding:40px 0 80px}.landing-hero__eyebrow{letter-spacing:.14em;text-transform:uppercase;color:#60a5fa;margin-bottom:22px;font-size:14px;font-weight:650}.landing-hero__headline{letter-spacing:-.045em;color:#fafafa;margin-bottom:24px;font-size:clamp(2.5rem,5.5vw,3.6rem);font-weight:800;line-height:1.06}.landing-hero__tagline{color:var(--text-secondary);max-width:52ch;margin-bottom:40px;font-size:clamp(1.12rem,2.4vw,1.3rem);line-height:1.68}.landing-hero__actions{flex-wrap:wrap;gap:16px;display:flex}.landing-btn{border-radius:var(--radius-md);font-family:var(--font);transition:transform .35s var(--ease-spring), box-shadow .4s ease, border-color .3s ease, background .3s ease;justify-content:center;align-items:center;gap:10px;padding:15px 28px;font-size:17px;font-weight:650;text-decoration:none;display:inline-flex}.landing-btn--primary{background:var(--accent);color:#fff;border:1px solid #ffffff1f;box-shadow:0 6px 28px #3b82f661}.landing-btn--primary:hover{color:#fff;background:#2563eb;transform:translateY(-4px);box-shadow:0 16px 48px #3b82f673}.landing-btn--outline{color:var(--text-primary);border:1px solid var(--border-strong);-webkit-backdrop-filter:blur(10px);background:#1414188c}.landing-btn--outline:hover{color:var(--text-primary);border-color:var(--accent-border);background:var(--accent-muted);transform:translateY(-4px)}.landing-features{padding-top:8px}.landing-features__title{letter-spacing:.12em;text-transform:uppercase;color:var(--text-muted);margin-bottom:28px;font-size:13px;font-weight:700}.landing-feature-grid{grid-template-columns:repeat(auto-fit,minmax(272px,1fr));gap:22px;display:grid}.landing-card{border:1px solid var(--border);border-radius:var(--radius-xl);-webkit-backdrop-filter:blur(14px);transition:border-color .4s ease, box-shadow .5s var(--ease-out-expo);background:#141418b8;padding:30px;position:relative}.landing-card:hover{border-color:#3b82f659;box-shadow:0 28px 64px #00000080,0 0 40px #3b82f614}.landing-card__icon{border-radius:var(--radius-md);background:var(--accent-muted);border:1px solid var(--accent-border);width:52px;height:52px;color:var(--accent);transition:transform .4s var(--ease-spring);justify-content:center;align-items:center;margin-bottom:20px;display:flex}.landing-card:hover .landing-card__icon{transform:scale(1.08)}.landing-card__title{letter-spacing:-.025em;margin-bottom:12px;font-size:20px;font-weight:700}.landing-card__text{color:var(--text-secondary);font-size:16px;line-height:1.65}.landing-workflow{padding-top:64px}.workflow-timeline{flex-direction:column;gap:0;max-width:700px;display:flex}.workflow-step{gap:24px;display:flex;position:relative}.workflow-step__marker{flex-direction:column;align-items:center;display:flex}.workflow-step__number{background:var(--bg-elevated);border:1px solid var(--border-strong);width:48px;height:48px;color:var(--accent);z-index:2;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:700;display:flex;box-shadow:0 4px 12px #0003}.workflow-step__line{background:linear-gradient(to bottom, var(--border-strong), transparent);flex:1;width:2px;min-height:40px;margin:8px 0}.workflow-step__content{padding-top:10px;padding-bottom:40px}.workflow-step__title{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:700}.workflow-step__text{color:var(--text-secondary);font-size:15px;line-height:1.6}.landing-tech{padding-top:48px}.tech-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;display:grid}.tech-card{border:1px solid var(--border);border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(12px);background:#14141880;align-items:center;gap:16px;padding:24px;transition:border-color .4s,box-shadow .4s;display:flex;box-shadow:0 4px 16px #00000026}.tech-card:hover{border-color:#3b82f640;box-shadow:0 12px 32px #0000004d,0 0 20px #3b82f60d}.tech-card__icon{border-radius:var(--radius-md);background:var(--bg-surface);width:48px;height:48px;color:var(--text-primary);border:1px solid var(--border-strong);justify-content:center;align-items:center;display:flex}.tech-card__info{flex-direction:column;display:flex}.tech-card__name{color:var(--text-primary);font-size:16px;font-weight:650}.tech-card__type{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:2px;font-size:13px;font-weight:500}.landing-footer{padding:32px 0 24px}.landing-footer__link{color:var(--text-secondary);transition:color .25s ease, gap .3s var(--ease-out-expo);align-items:center;gap:10px;font-size:17px;font-weight:600;display:inline-flex}.landing-footer__link:hover{color:var(--accent);gap:14px}@media (prefers-reduced-motion:reduce){.landing-bg__grid,.landing-bg__orb,.landing-nav,.landing-hero__eyebrow,.landing-hero__headline,.landing-hero__tagline,.landing-hero__actions,.landing-features__title,.landing-card,.landing-footer{animation:none!important}.landing-card:hover,.landing-btn--primary:hover,.landing-btn--outline:hover{transform:none}}@media (width<=720px){.landing-nav{flex-direction:column;align-items:stretch;padding:20px 22px}.landing-nav__links{justify-content:space-between;gap:12px;width:100%}.landing-main{padding:0 22px 72px}.landing-hero{padding-top:28px}}