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var(--ease-out)both;position:relative}.hero__mockup{position:relative}.hero__mockup-img{border-radius:var(--radius-lg);width:100%;height:auto;box-shadow:var(--shadow-xl);border:1px solid var(--glass-bg-hover)}.hero__float-card{background:var(--card-glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--glass-bg-strong);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);align-items:center;gap:10px;padding:12px 16px;animation:4s ease-in-out infinite floatCard;display:flex;position:absolute}.hero__float-card--score{animation-delay:0s;top:15%;left:-40px}.hero__float-card--streak{animation-delay:-1.5s;bottom:25%;right:-30px}.hero__float-card--rank{animation-delay:-3s;bottom:-10px;left:20%}@keyframes floatCard{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.float-card__icon{border-radius:var(--radius-sm);justify-content:center;align-items:center;width:36px;height:36px;font-size:1.1rem;display:flex}.float-card__icon 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(max-width:900px){.hero__inner{text-align:center;grid-template-columns:1fr}.hero__subtitle{margin-left:auto;margin-right:auto}.hero__actions,.hero__stats{justify-content:center}.hero__visual{max-width:500px;margin:0 auto}.hero__float-card--score{left:0}.hero__float-card--streak{right:0}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.features{padding:var(--space-5xl)0;background:var(--bg-surface-1);position:relative}.features:before{content:"";background:radial-gradient(circle,var(--float-radial)0%,transparent 70%);pointer-events:none;width:600px;height:600px;position:absolute;top:0;left:50%;transform:translate(-50%)}.features__grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.feature-card{background:var(--bg-card);border:1px solid var(--glass-bg);border-radius:var(--radius-lg);transition:all var(--duration-normal)var(--ease-out);animation:fadeInUp .6s 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10px;font-size:.68rem;font-weight:700}.feature-card__title{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.01em;margin-bottom:10px;font-size:1.1rem;font-weight:700}.feature-card__desc{font-family:var(--font-body);color:var(--text-muted);font-size:.9rem;line-height:1.65}.how-it-works{padding:var(--space-5xl)0;background:var(--bg-base)}.steps{grid-template-columns:repeat(4,1fr);gap:32px;display:grid;position:relative}.steps__line{background:linear-gradient(90deg,var(--steel),var(--teal),var(--steel));opacity:.3;height:2px;position:absolute;top:60px;left:12.5%;right:12.5%}.step{text-align:center;animation:fadeInUp .6s var(--ease-out)both;position:relative}.step__number{font-family:var(--font-mono);color:var(--teal-400);margin-bottom:12px;font-size:.75rem;font-weight:500}.step__icon{background:var(--bg-card);border:2px solid var(--steel);z-index:2;width:72px;height:72px;transition:all var(--duration-normal)var(--ease-out);color:var(--teal-400);border-radius:50%;justify-content:center;align-items:center;margin:0 auto 20px;font-size:1.8rem;display:flex;position:relative}.step__icon svg{width:28px;height:28px}.step:hover .step__icon{border-color:var(--teal);box-shadow:var(--shadow-teal);transform:scale(1.08)}.step__title{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.01em;margin-bottom:10px;font-size:1.05rem;font-weight:700}.step__desc{font-family:var(--font-body);color:var(--text-muted);max-width:240px;margin:0 auto;font-size:.88rem;line-height:1.65}@media (max-width:768px){.steps{grid-template-columns:1fr 1fr}.steps__line{display:none}}@media (max-width:480px){.steps{grid-template-columns:1fr}}.subjects{padding:var(--space-5xl)0;background:var(--bg-surface-1)}.subjects__grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px;display:grid}.subject-card{background:var(--bg-card);border:1px solid var(--glass-bg);border-radius:var(--radius-lg);text-align:center;transition:all var(--duration-normal)var(--ease-out);animation:fadeInUp .6s var(--ease-out)both;padding:28px}.subject-card:hover{border-color:var(--subj-color);transform:translateY(-4px)}.subject-card__icon{color:var(--subj-color);justify-content:center;margin-bottom:16px;font-size:2.5rem;display:flex}.subject-card__icon svg{width:40px;height:40px}.subject-card__name{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.01em;margin-bottom:8px;font-size:1.15rem;font-weight:700}.subject-card__board{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px;font-size:.75rem}.subject-card__stats{justify-content:center;gap:24px;margin-bottom:16px;display:flex}.subject-card__stat-val{color:var(--text-primary);font-size:1rem;font-weight:700;display:block}.subject-card__stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.72rem}.subject-card__bar{background:var(--shell-border);border-radius:2px;height:4px;margin-bottom:16px;overflow:hidden}.subject-card__bar-fill{background:var(--subj-color);width:0%;height:100%;transition:width 1.5s var(--ease-out);border-radius:2px}.subject-card:hover .subject-card__bar-fill{width:100%}.subject-card__link{color:var(--subj-color);transition:all var(--duration-fast);font-size:.85rem;font-weight:600}.subject-card__link:hover{letter-spacing:.02em}.dashboard-preview{padding:var(--space-5xl)0;background:var(--bg-base)}.dashboard-preview__wrapper{max-width:1100px;margin:0 auto;position:relative}.dashboard-preview__frame{background:var(--bg-card);border:1px solid var(--glass-bg-hover);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);overflow:hidden}.dashboard-preview__topbar{background:var(--backdrop-light);border-bottom:1px solid var(--glass-bg);align-items:center;gap:12px;padding:12px 16px;display:flex}.topbar-dots{gap:6px;display:flex}.topbar-dots span{background:var(--steel);border-radius:50%;width:10px;height:10px}.topbar-dots span:first-child{background:var(--coral)}.topbar-dots span:nth-child(2){background:var(--amber)}.topbar-dots 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(max-width:768px){.callout{display:none}}.case-studies{padding:var(--space-5xl)0;background:var(--bg-base)}.case-studies__grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:28px;margin-top:40px;display:grid}.case-studies__card{background:var(--bg-surface-1);border:1px solid var(--slate);border-radius:var(--radius-lg);transition:border-color var(--duration-fast)var(--ease-out);overflow:hidden}.case-studies__card:hover{border-color:var(--teal)}.case-studies__video-wrap{aspect-ratio:16/9;background:var(--bg-card);position:relative}.case-studies__loader-video{opacity:0;pointer-events:none;z-index:-1;width:1px;height:1px;position:absolute}.case-studies__video{object-fit:cover;width:100%;height:100%;display:block}.case-studies__title{font-family:var(--font-display);color:var(--text-primary);margin:0;padding:16px 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var(--steel);border-radius:50%;width:48px;height:48px}.testimonial-card__avatar--initials{background:var(--steel);color:var(--text-primary);justify-content:center;align-items:center;font-size:.85rem;font-weight:700;display:flex}.testimonial-card__name{font-family:var(--font-display);color:var(--text-primary);font-size:.9rem;font-weight:700}.testimonial-card__score{font-family:var(--font-body);color:var(--teal-400);font-size:.78rem;font-weight:600}.testimonials__dots{justify-content:center;gap:8px;display:flex}.testimonials__dot{background:var(--steel);cursor:pointer;width:8px;height:8px;transition:all var(--duration-fast);border:none;border-radius:50%}.testimonials__dot--active{background:var(--teal);border-radius:4px;width:24px}.challenges{padding:var(--space-5xl)0;background:var(--bg-base)}.challenges__inner{grid-template-columns:1fr 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landingShimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.pricing-card--popular{border-color:var(--teal);box-shadow:var(--shadow-teal);z-index:2;transform:scale(1.04)}.pricing-card--popular:hover{transform:scale(1.04)translateY(-4px)}.pricing-card__badge{background:var(--teal);color:var(--text-primary);text-transform:uppercase;letter-spacing:.08em;border-radius:var(--radius-full);padding:5px 16px;font-size:.72rem;font-weight:700;position:absolute;top:-12px;left:50%;transform:translate(-50%)}.pricing-card__name{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.01em;margin-bottom:6px;font-size:1.3rem;font-weight:700}.pricing-card__desc{font-family:var(--font-body);color:var(--text-muted);margin-bottom:24px;font-size:.85rem}.pricing-card__price{align-items:baseline;gap:4px;margin-bottom:28px;display:flex}.pricing-card__currency{font-family:var(--font-body);color:var(--text-muted);font-size:.85rem;font-weight:600}.pricing-card__amount{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.03em;font-size:2.8rem;font-weight:800}.pricing-card__period{color:var(--text-muted);font-size:.85rem;font-weight:500}.pricing-card__features{margin-bottom:28px;list-style:none}.pricing-card__features li{color:var(--text-muted);align-items:center;gap:10px;padding:7px 0;font-size:.88rem;display:flex}@media (max-width:900px){.pricing__grid{grid-template-columns:1fr;max-width:420px;margin:0 auto}.pricing-card--popular{transform:none}}.cta-section{padding:var(--space-5xl)0;background:var(--bg-surface-1);position:relative;overflow:hidden}.cta-section:before{content:"";background:radial-gradient(ellipse at center,var(--teal-soft-bg)0%,transparent 70%);pointer-events:none;position:absolute;inset:0}.cta-section__inner{text-align:center;position:relative}.cta-section__title{font-family:var(--font-display);color:var(--text-on-primary);letter-spacing:-.03em;margin-bottom:40px;font-size:clamp(2rem,4.5vw,3.2rem);font-weight:800;line-height:1.15}.cta-section__countdown{justify-content:center;gap:20px;margin-bottom:32px;display:flex}.countdown-block{background:var(--bg-card);border:1px solid var(--glass-bg-hover);border-radius:var(--radius-lg);min-width:90px;padding:20px 24px}.countdown-block__val{font-family:var(--font-display);color:var(--teal-400);letter-spacing:-.02em;font-size:2.2rem;font-weight:800;display:block}.countdown-block__label{font-family:var(--font-body);color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;font-size:.72rem;font-weight:500}.cta-section__text{color:var(--text-on-primary);font-size:1.1rem}@supports (color:color-mix(in lab, red, red)){.cta-section__text{color:color-mix(in srgb,var(--text-on-primary)88%,transparent)}}.cta-section__text{max-width:560px;margin:0 auto 32px;line-height:1.7}.contact{padding:var(--space-5xl)0;background:var(--bg-base)}.contact__inner{grid-template-columns:1fr 1fr;align-items:start;gap:60px;display:grid}.contact__info{text-align:left}.contact__info h2.section-title{text-align:left;display:block}.contact__info .section-desc{max-width:480px;margin:0}.contact__methods{flex-direction:column;gap:20px;margin-top:32px;display:flex}.contact__method{background:var(--bg-card);border:1px 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var(--glass-bg-hover);width:36px;height:36px;color:var(--text-muted);transition:all var(--duration-fast);border-radius:50%;justify-content:center;align-items:center;font-size:.82rem;font-weight:700;display:flex}.footer__social-link:hover{border-color:var(--teal);color:var(--teal-400)}.footer__col h4{font-family:var(--font-display);color:var(--text-primary);letter-spacing:-.01em;margin-bottom:18px;font-size:.9rem;font-weight:700}.footer__col a{font-family:var(--font-body);color:var(--text-muted);transition:color var(--duration-fast);padding:6px 0;font-size:.85rem;display:block}.footer__col a:hover{color:var(--teal-300)}.footer__bottom{border-top:1px solid var(--glass-bg);color:var(--text-muted);justify-content:space-between;align-items:center;padding-top:24px;font-size:.82rem;display:flex}@media (max-width:768px){.footer__grid{grid-template-columns:1fr 1fr 1fr;gap:24px}.footer__brand{text-align:center;flex-direction:column;grid-column:1/-1;align-items:center;display:flex}.footer__brand 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.btn{justify-content:center;width:100%}.hero__stats{flex-wrap:wrap;justify-content:center;gap:16px}.hero__stat-divider{display:none}.hero__stat{text-align:center}.hero__stat-number{font-size:1.4rem}.hero__stat-label{font-size:.72rem}.hero__trusted{margin-top:40px;padding-top:28px}.hero__trusted-logos{gap:20px}.hero__trusted-item{font-size:.9rem}.features{padding:var(--space-4xl)0}.features__grid{grid-template-columns:1fr;gap:16px}.how-it-works{padding:var(--space-4xl)0}.steps{grid-template-columns:1fr;gap:24px}.steps__line{display:none}.step{max-width:100%}.subjects{padding:var(--space-4xl)0}.subjects__grid{grid-template-columns:1fr}.dashboard-preview{padding:var(--space-4xl)0}.dashboard-preview__wrapper{padding:0 8px}.case-studies{padding:var(--space-4xl)0}.case-studies__grid{grid-template-columns:1fr;gap:20px;margin-top:24px}.testimonials{padding:var(--space-4xl)0}.testimonials__carousel{grid-template-columns:1fr}.challenges{padding:var(--space-4xl)0}.challenges__inner{text-align:center;grid-template-columns:1fr;gap:32px}.challenges__content .section-desc{margin-left:auto;margin-right:auto}.pricing,.cta-section{padding:var(--space-4xl)0}.cta-section__title{margin-bottom:24px;font-size:clamp(1.5rem,5vw,2rem)}.cta-section__countdown{flex-wrap:wrap;justify-content:center;gap:12px}.countdown-block{min-width:70px;padding:14px 16px}.countdown-block__val{font-size:1.75rem}.contact{padding:var(--space-4xl)0}.contact__form{padding:20px}.footer{padding:var(--space-3xl)0 var(--space-lg)}.footer__grid{gap:28px;margin-bottom:32px}}@media (max-width:480px){.hero{padding:88px 0 24px}.hero__title{font-size:1.6rem}.hero__stats{gap:12px}.hero__stat-number{font-size:1.25rem}.feature-card{padding:20px}.step__number{font-size:2rem}.countdown-block{min-width:64px;padding:12px}.countdown-block__val{font-size:1.5rem}.footer__grid{grid-template-columns:1fr 1fr 1fr;gap:20px}.footer__brand{text-align:center;flex-direction:column;grid-column:1/-1;align-items:center;display:flex}.footer__brand .navbar__logo{justify-content:center}.footer__tagline{max-width:none;margin-left:auto;margin-right:auto}.footer__social{justify-content:center}.footer__col{text-align:center}}[data-theme=light] .hero{background:var(--bg-base)}[data-theme=light] .hero__stat-label,[data-theme=light] .countdown-block__label,[data-theme=light] .contact__method-label,[data-theme=light] .footer__tagline,[data-theme=light] .footer__bottom{color:var(--text-muted)}[data-theme=light] .footer{background:var(--landing-footer-bg);border-top-color:var(--shell-border)}[data-theme=light] .navbar__links{background:var(--landing-nav-bg);border-color:var(--shell-border)}[data-theme=light] .navbar__link{background:var(--bg-card);border:1px solid var(--border-medium);color:var(--text-muted)}[data-theme=light] .navbar__link:hover{color:var(--text-primary);background:var(--shell-hover)}[data-theme=light] .pricing-card--popular{border-color:var(--accent-1)}[data-theme=dark] .hero__stat-label,[data-theme=dark] .countdown-block__label{color:var(--text-muted)}.auth-page{background:var(--bg-base);min-height:100vh;font-family:var(--font-body);justify-content:center;align-items:center;padding:24px;display:flex;position:relative;overflow:hidden}.auth-video-bg{z-index:0;position:absolute;inset:0}.auth-video{object-fit:cover;width:100%;height:100%}.auth-video-overlay{background:var(--overlay-gradient),linear-gradient(90deg,var(--overlay-scrim)0%,transparent 50%);position:absolute;inset:0}.auth-particles{z-index:1;pointer-events:none;position:absolute;inset:0}.auth-particle{opacity:.12;border-radius:50%;animation:12s ease-in-out infinite floatParticle;position:absolute}.auth-particle--1{background:var(--teal-400);width:250px;height:250px;animation-delay:0s;top:5%;right:-5%}.auth-particle--2{background:var(--sky);width:180px;height:180px;animation-delay:-3s;bottom:15%;left:-3%}.auth-particle--3{background:var(--amber);width:120px;height:120px;animation-delay:-6s;top:60%;right:20%}.auth-particle--4{background:var(--violet);width:100px;height:100px;animation-delay:-9s;top:25%;left:15%}.auth-back-home{z-index:20;background:var(--bg-card);align-items:center;gap:8px;padding:10px 20px;display:flex;position:absolute;top:24px;left:24px}@supports (color:color-mix(in lab, red, red)){.auth-back-home{background:color-mix(in srgb,var(--bg-card)70%,transparent)}}.auth-back-home{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-medium);font-family:var(--font-body);color:var(--text-secondary);border-radius:50px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s cubic-bezier(.16,1,.3,1)}.auth-back-home:hover{background:var(--primary-soft);border-color:var(--teal);color:var(--teal);transform:translate(-4px)}.auth-back-home svg{transition:transform .2s}.auth-back-home:hover svg{transform:translate(-4px)}.auth-theme-toggle{z-index:20;position:absolute;top:24px;right:24px}.auth-card{width:960px;max-width:100%;min-height:580px;box-shadow:var(--shadow-xl),0 0 0 1px var(--border-subtle);z-index:10;background:var(--bg-card);border-radius:24px;display:flex;position:relative;overflow:hidden}@supports (color:color-mix(in lab, red, red)){.auth-card{background:color-mix(in 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cubic-bezier(.16,1,.3,1)}.auth-button:hover{box-shadow:var(--shadow-lg);background:var(--gradient-teal);transform:translateY(-2px)}.auth-button:active{transform:translateY(0)}.auth-field-error,.auth-error{color:var(--coral);font-family:var(--font-body);text-align:left;margin-top:-8px;margin-bottom:12px;padding-left:4px;font-size:12px;font-weight:500;display:block}.auth-forgot{text-align:right;font-family:var(--font-body);color:var(--teal-400);cursor:pointer;margin-top:-8px;margin-bottom:20px;font-size:13px;font-weight:500;transition:color .2s}.auth-forgot:hover{color:var(--teal-300)}.auth-divider{color:var(--text-muted);align-items:center;margin:24px 0;font-size:13px;font-weight:500;display:flex}.auth-divider:before,.auth-divider:after{content:"";background:var(--glass-bg-strong);flex:1;height:1px}.auth-divider:before{margin-right:16px}.auth-divider:after{margin-left:16px}.auth-google-btn,.auth-fb-btn{width:100%;color:var(--cloud);border:1px solid 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var(--border-subtle);border-radius:14px;flex-direction:column;gap:12px;padding:1.25rem;display:flex}.skeleton-learn-card__icon{border-radius:12px;width:52px;height:52px}.skeleton-learn-card__title{width:68%;height:16px}.skeleton-learn-card__board{width:44%;height:12px}.skeleton-learn-card__stats{gap:1.5rem;margin-top:4px;display:flex}.skeleton-learn-card__stat{flex-direction:column;gap:6px;display:flex}.skeleton-learn-card__stat-val{width:38px;height:18px}.skeleton-learn-card__stat-label{width:52px;height:10px}.skeleton-learn-card__bar{border-radius:999px;width:100%;height:6px}.skeleton-learn-card__cta{width:80px;height:12px;margin-top:4px}.skeleton-item-cards{flex-direction:column;gap:12px;display:flex}.skeleton-item-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:12px;flex-direction:column;gap:10px;padding:1rem 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var(--border-subtle);border-radius:14px;flex-direction:column;gap:12px;padding:1.5rem;display:flex}.skeleton-billing-plan__title{width:60%;height:18px}.skeleton-billing-plan__price{width:45%;height:28px}.skeleton-billing-plan__feature{width:100%;height:12px}.skeleton-billing-plan__btn{border-radius:8px;width:100%;height:40px;margin-top:8px}.skeleton-billing-settings{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:12px;flex-direction:column;gap:12px;padding:1.25rem;display:flex}.skeleton-billing-settings__row{justify-content:space-between;align-items:center;gap:16px;display:flex}.skeleton-billing-settings__label{width:40%;height:13px}.skeleton-billing-settings__value{width:30%;height:13px}.text-error{color:var(--danger);font-size:14px}.text-muted{color:var(--text-muted);font-size:14px}.pagination-bar,.mcq-pagination{flex-wrap:wrap;align-items:center;gap:10px;margin-top:1.25rem;display:flex}.pagination-bar__info,.mcq-pagination__info{color:var(--text-muted);font-size:14px}.modal-overlay{--text-md:15px;--leading-relaxed:1.72;--font-ui:"Inter","Segoe 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.15s;display:flex}.modal__close:hover{background:var(--surface-3);color:var(--text-primary);border-color:var(--border-subtle)}.modal__body{-webkit-overflow-scrolling:touch;flex:1;min-height:0;padding:1.25rem;overflow-y:auto}.modal__body--flush{padding-top:0}.modal__footer{border-top:1px solid var(--border-subtle);background:var(--surface-2);flex-shrink:0;justify-content:flex-end;align-items:center;gap:10px;padding:1rem 1.25rem;display:flex}.modal__footer .btn-primary,.modal__footer .btn-ghost{min-height:42px;padding:0 16px}.modal-alert{background:var(--danger-bg);border:1px solid var(--danger-border);color:var(--danger);border-radius:8px;margin-bottom:1rem;padding:10px 14px;font-size:13px;line-height:1.45}.modal-steps{gap:8px;margin-bottom:1.25rem;display:flex}.modal-step{background:var(--surface-3);border-radius:999px;flex:1;height:4px;transition:background 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textarea::placeholder,.form-input::placeholder,.form-textarea::placeholder{color:var(--text-soft)}.form-group input:hover,.form-group select:hover,.form-group textarea:hover,.form-input:hover,.form-textarea:hover{border-color:var(--border-strong);background:var(--surface-hover)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus,.form-input:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 1px var(--primary);background:var(--surface-2);outline:none}.form-group input:disabled,.form-group textarea:disabled,.form-input:disabled,.form-textarea:disabled{opacity:.55;cursor:not-allowed}.form-group input[type=date],.form-group input[type=datetime-local],.form-group input[type=time]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){.form-group input[type=date],.form-group input[type=datetime-local],.form-group input[type=time]{--lightningcss-light: ;--lightningcss-dark:initial}}.form-hint{color:var(--text-soft);margin-top:6px;font-size:12px;line-height:1.45}.form-hint--below-title{margin-top:-4px;margin-bottom:12px}.form-check{border:1px solid var(--border-subtle);background:var(--surface-2);cursor:pointer;border-radius:10px;align-items:flex-start;gap:10px;padding:12px 14px;transition:border-color .15s,background .15s;display:flex}.form-check:hover{border-color:var(--border-medium);background:var(--surface-hover)}.form-check input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary);cursor:pointer;flex-shrink:0;margin-top:2px}.form-check__text{flex:1;min-width:0}.form-check__label{color:var(--text-primary);margin-bottom:2px;font-size:14px;font-weight:600;display:block}.form-check__hint{color:var(--text-muted);font-size:12px;line-height:1.45}.form-upload-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.form-upload-box{border:1px dashed var(--border-medium);background:var(--surface-2);border-radius:10px;flex-direction:column;gap:8px;padding:14px;transition:border-color .15s,background .15s;display:flex}.form-upload-box:hover{border-color:var(--border-strong);background:var(--surface-hover)}.form-upload-box label{margin-bottom:0;font-size:11px}.form-upload-box input[type=file]{width:100%;min-height:auto;color:var(--text-secondary);background:0 0;border:none;padding:0;font-size:13px}.form-upload-box input[type=file]:disabled{opacity:.45}.form-upload-box__name{color:var(--accent-amber);word-break:break-all;font-size:12px}.form-section-title{color:var(--text-primary);margin:0 0 12px;font-size:14px;font-weight:600}@media (max-width:640px){.modal{border-radius:12px;max-height:calc(100dvh - 24px)}.modal__footer{flex-direction:column-reverse;align-items:stretch}.modal__footer .btn-primary,.modal__footer .btn-ghost{justify-content:center;width:100%;min-height:44px}.form-upload-grid{grid-template-columns:1fr}}.confirm-dialog__message{color:var(--text-secondary);margin:0;font-size:14px;line-height:1.55}.modal-overlay--top{z-index:var(--z-dialog-elevated)}.modal--pdf{max-width:900px;height:min(92vh,900px)}.modal--pdf .modal__body--flush{flex:1;min-height:0;padding:0;display:flex}.pdf-modal__frame{background:var(--bg-card);border:none;flex:1;width:100%;min-height:60vh}.note-view__image{border:1px solid var(--border-subtle);cursor:zoom-in;border-radius:10px;width:100%}.note-view__text{white-space:pre-wrap;color:var(--text-secondary);font-size:14px;line-height:1.6}.note-view__pdf-btn{align-items:center;gap:8px;display:inline-flex}.note-view__zoom{z-index:var(--z-dialog-zoom);background:var(--tooltip-bg);cursor:zoom-out;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.note-view__zoom-img{object-fit:contain;border-radius:8px;max-width:100%;max-height:100%}.video-panel{margin-bottom:1.25rem}.video-panel__head{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;display:flex}.video-panel__title{margin-bottom:4px;font-size:1.1rem}.video-panel__meta{color:var(--text-muted);font-size:13px}.video-panel__desc{color:var(--text-secondary);margin-bottom:12px;font-size:14px}.video-panel__player{background:var(--video-bg);border:1px solid var(--border-subtle);border-radius:10px;width:100%;max-height:480px}.mcq-list{content-visibility:auto;flex-direction:column;gap:12px;display:flex}.mcq-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:10px;padding:1.1rem 1.2rem}.mcq-card__question{font-size:var(--text-md);color:var(--text-primary);font-weight:500;line-height:var(--leading-relaxed);letter-spacing:-.01em;margin-bottom:10px}.mcq-badge{border-radius:999px;margin-bottom:10px;padding:3px 10px;font-size:11px;font-weight:600;display:inline-block}.mcq-options{flex-direction:column;gap:8px;display:flex}.mcq-option{border:1px solid var(--border-subtle);background:var(--surface-2);color:var(--text-secondary);font-size:var(--text-base);line-height:var(--leading-normal);cursor:pointer;border-radius:8px;padding:10px 14px;transition:border-color .15s,background .15s,color .15s}.mcq-option:hover:not(.mcq-option--locked){border-color:var(--border-accent);background:var(--surface-3);color:var(--text-primary)}.mcq-option--locked{cursor:default}.mcq-option--correct{border-color:var(--success);background:var(--success-bg);color:var(--success)}.mcq-option--wrong{border-color:var(--danger);background:var(--danger-bg);color:var(--danger)}.mcq-feedback{border-radius:8px;margin-top:12px;padding:12px 14px;font-size:14px}.mcq-feedback--correct{background:var(--success-bg);border:1px solid var(--success-border-md);color:var(--success)}.mcq-feedback--wrong{background:var(--danger-bg);border:1px solid var(--danger-border);color:var(--danger)}.mcq-feedback p{color:inherit;margin-top:6px}.chat-layout{grid-template-columns:280px 1fr;gap:14px;min-height:480px;display:grid}@media (max-width:768px){.chat-layout{grid-template-columns:1fr}}.chat-sidebar{border:1px solid var(--border-subtle);background:var(--surface-1);border-radius:12px;overflow:hidden}.chat-thread{text-align:left;border:none;border-bottom:1px solid var(--border-subtle);cursor:pointer;background:0 0;width:100%;padding:12px 14px;transition:background .15s;display:block}.chat-thread:hover{background:var(--surface-3)}.chat-thread--active{background:var(--primary-soft);border-left:3px solid var(--primary)}.chat-main{border:1px solid var(--border-subtle);background:var(--surface-1);border-radius:12px;flex-direction:column;min-height:480px;display:flex}.chat-messages{flex-direction:column;flex:1;gap:10px;padding:1rem;display:flex;overflow-y:auto}.chat-message{border-radius:10px;max-width:80%;padding:10px 14px;font-size:14px;line-height:1.5}.chat-message--own{background:var(--primary);color:var(--text-on-primary);align-self:flex-end}.chat-message--other{background:var(--surface-3);color:var(--text-primary);align-self:flex-start}.chat-input-bar{border-top:1px solid var(--border-subtle);gap:8px;padding:12px;display:flex}.chat-input-bar input{border:1px solid var(--border-medium);background:var(--surface-1);min-height:42px;color:var(--text-primary);border-radius:8px;flex:1;padding:0 12px;font-size:14px}.flashcard-review{text-align:center;background:var(--surface-1);border:1px solid var(--border-subtle);cursor:pointer;max-width:520px;min-height:280px;box-shadow:var(--shadow-card);border-radius:12px;flex-direction:column;justify-content:center;align-items:center;margin:0 auto;padding:2rem 1.5rem;display:flex}.flashcard-review__label{text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:12px;font-size:11px;font-weight:600}.flashcard-review__text{color:var(--text-primary);font-size:1.15rem;font-weight:600;line-height:1.5}.flashcard-actions{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:1.25rem;display:flex}.rank-highlight__value{color:var(--accent-amber);font-size:2rem;font-weight:700;line-height:1}.rank-highlight__label{color:var(--text-muted);margin-top:4px;font-size:13px}.timer-bar{top:var(--shell-bar-height);z-index:50;background:var(--surface-2);border:1px solid var(--border-accent);color:var(--text-primary);box-shadow:var(--shadow-soft);border-radius:8px;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:10px 16px;display:flex;position:sticky}.timer-bar__time{font-variant-numeric:tabular-nums;font-size:1.1rem;font-weight:700}.dash-layout .books-hero{background:var(--surface-1);border:1px solid var(--shell-border);border-left:3px solid var(--primary);box-shadow:var(--shadow-soft);border-radius:8px;justify-content:space-between;align-items:center;gap:2rem;margin-bottom:1.5rem;padding:clamp(1.25rem,3vw,2rem);display:flex}.dash-layout .books-hero__content h1{margin-bottom:8px;font-size:clamp(1.4rem,3vw,1.85rem)}.dash-layout .books-hero__content p{color:var(--text-muted);font-size:15px}.dash-layout .books-hero__content button{background:var(--primary);color:var(--text-on-primary);border:none;border-radius:4px;margin-top:12px;padding:10px 18px;font-size:14px;font-weight:600}.dash-layout .books-hero__content button:hover{background:var(--primary-light)}.dash-layout .board-badge{background:var(--accent-amber-soft);color:var(--accent-amber);border:1px solid var(--accent-amber-muted)}.dash-layout .sidebar{background:var(--shell-sidebar);border-right:1px solid var(--shell-border);box-shadow:1px 0 #0000000a}.dash-layout .sidebar__logo{height:var(--shell-bar-height);min-height:var(--shell-bar-height);max-height:var(--shell-bar-height);box-sizing:border-box;border-bottom:1px solid var(--shell-border);background:var(--shell-sidebar);flex-shrink:0;padding:0 1.25rem}.dash-layout .sidebar__logo-link{min-height:0}.dash-layout .sidebar__logo-icon{width:32px;height:32px}.dash-layout .sidebar__logo-text{color:var(--text-primary);font-family:var(--font-ui);letter-spacing:-.03em;font-size:17px;font-weight:700;line-height:1}.dash-layout .sidebar__logo-accent{color:var(--accent-amber)}.dash-layout .sidebar__section-label{color:var(--text-soft);letter-spacing:.1em;text-transform:uppercase;font-size:10px;font-weight:600}.dash-layout .sidebar__link{color:var(--text-muted);letter-spacing:-.01em;border-radius:6px;font-size:13.5px;font-weight:500}.dash-layout .sidebar__link:hover{background:var(--shell-hover);color:var(--text-primary)}.dash-layout .sidebar__link--active{background:var(--accent-1-soft);color:var(--accent-1);border-left:2px solid var(--accent-1);box-shadow:inset 0 0 0 1px var(--accent-1);font-weight:600}@supports (color:color-mix(in lab, red, red)){.dash-layout .sidebar__link--active{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent-1)15%,transparent)}}.dash-layout .sidebar__link--active:hover{background:var(--accent-1)}@supports (color:color-mix(in lab, red, red)){.dash-layout .sidebar__link--active:hover{background:color-mix(in srgb,var(--accent-1)18%,transparent)}}.dash-layout .sidebar__link--active:hover{color:var(--accent-1)}.dash-layout .sidebar__link--locked{opacity:.85}.dash-layout .sidebar__link-lock{opacity:.55;margin-left:auto}.dash-layout .sidebar__footer{border-top:1px solid var(--glass-border);min-height:var(--shell-footer-height);height:var(--shell-footer-height);padding:0 var(--space-lg);box-sizing:border-box;background:0 0;flex-shrink:0;align-items:center;display:flex}.dash-layout .sidebar__logout{color:var(--danger);min-height:unset;padding:6px 12px;font-size:12.5px;line-height:1.25}.dash-layout .sidebar__logout:hover{background:var(--danger-bg)}.dash-layout .sidebar-overlay{background:var(--backdrop-medium)}.dash-layout .dash-header{background:var(--shell-header);border-bottom:1px solid var(--shell-border);height:var(--shell-bar-height);min-height:var(--shell-bar-height);max-height:var(--shell-bar-height);box-sizing:border-box;box-shadow:0 1px 3px #00000014}.dash-layout .dash-header__menu-btn{color:var(--text-primary)}.dash-layout .dash-header__menu-btn:hover{background:var(--shell-hover)}.dash-layout .dash-header__search{background:var(--surface-2);border-color:var(--border-subtle)}.dash-layout .dash-header__search:focus-within{border-color:var(--primary);background:var(--shell-hover);box-shadow:0 0 0 1px var(--primary)}.dash-layout .dash-header__search-input{color:var(--text-primary);letter-spacing:-.01em;font-size:13.5px;font-weight:500}.dash-layout .dash-header__name{letter-spacing:-.02em;font-size:13.5px;font-weight:600}.dash-layout .dash-header__search--inactive{opacity:.55}.dash-layout .dash-header__search--inactive:focus-within{border-color:var(--shell-border);box-shadow:none}.dash-layout .dash-header__search-clear{background:var(--shell-border);color:var(--text-muted)}.dash-layout .dash-header__search-clear:hover{background:var(--shell-hover);color:var(--text-primary)}.dash-layout .dash-header__icon-btn{color:var(--text-muted)}.dash-layout .dash-header__profile-btn{background:var(--shell-hover);border-color:var(--shell-border);color:var(--text-primary)}.dash-layout .dash-header__avatar--placeholder{background:var(--primary)}.dash-layout .dash-header__dropdown{background:var(--surface-2);border:1px solid var(--border-medium);box-shadow:none;border-radius:10px;padding:6px;overflow:hidden}.dash-layout .dash-header__dropdown-header{background:var(--glass-bg-muted);border-radius:6px;margin-bottom:4px;padding:10px 12px}.dash-layout .dash-header__dropdown-name{color:var(--text-primary);font-size:13px;font-weight:600}.dash-layout .dash-header__dropdown-email{color:var(--text-muted);margin-top:2px;font-size:11.5px}.dash-layout .dash-header__dropdown-divider{background:var(--editor-hover);height:1px;margin:4px 0}.dash-layout .dash-header__dropdown-item{color:var(--text-secondary);border-radius:6px;gap:10px;margin:1px 0;padding:9px 12px;font-size:13px;font-weight:500;transition:background .15s,color .15s}.dash-layout .dash-header__dropdown-item svg{opacity:.75}.dash-layout .dash-header__dropdown-item:hover{background:var(--bg-surface-2);color:var(--text-primary)}.dash-layout .dash-header__dropdown-item:hover svg{opacity:1;color:var(--primary)}.dash-layout .dash-header__dropdown-item--danger{color:var(--coral)}.dash-layout .dash-header__dropdown-item--danger:hover{background:var(--danger-bg-soft);color:var(--coral)}.dash-layout .dash-footer{background:var(--shell-footer);border-top:1px solid 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(max-width:768px){.contact-support__methods{grid-template-columns:1fr}}.profile-form{flex-direction:column;gap:12px;display:flex}.profile-form__grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.profile-form__field{flex-direction:column;gap:6px;display:flex}.profile-form__field>span{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-size:11px;font-weight:600}.profile-form__field input,.profile-form__textarea{background:var(--surface-hover);border:1px solid var(--border-medium);width:100%;color:var(--text-primary);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:14px;transition:border-color .15s,box-shadow .15s}.profile-form__textarea{resize:vertical;min-height:120px;line-height:1.6}.profile-form__field input:focus,.profile-form__textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);outline:none}.profile-form__field 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::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}.dash-layout ::selection{background:var(--brand-glow);color:var(--text-primary)}.dash-layout .notes-page,.dash-layout .notes-section{max-width:100%}.dash-layout .notes-header,.dash-layout .notes-header-left h2{color:var(--text-primary)}.dash-layout .notes-search,.dash-layout .notes-filter,.dash-layout .add-note-btn{border:1px solid var(--border-medium);background:var(--surface-1);min-height:42px;color:var(--text-primary);border-radius:8px;padding:0 14px;font-size:14px}.dash-layout .add-note-btn{background:var(--primary);color:var(--text-on-primary);cursor:pointer;border:none;font-weight:600}.dash-layout .add-note-btn:hover{background:var(--primary-light)}.dash-layout .note-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:10px;margin-bottom:8px;padding:14px 16px}.dash-layout .note-card__title{color:var(--text-primary);margin-bottom:4px;font-weight:600}.dash-layout .note-card__btn{border:1px solid var(--border-medium);background:var(--surface-1);color:var(--text-primary);cursor:pointer;border-radius:8px;padding:6px 12px;font-size:12px;font-weight:600}.dash-layout .type-badge{background:var(--surface-3);color:var(--text-muted);border-radius:999px;padding:2px 8px;font-size:11px;font-weight:600}.dash-layout .notes-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;display:grid}.span-full{grid-column:1/-1}.filter-bar{background:var(--surface-1);border:1px solid var(--border-subtle);box-shadow:var(--shadow-soft);border-radius:8px;margin-bottom:1.5rem;padding:6px}.filter-bar input,.filter-bar select{background:0 0;border-color:#0000}.filter-bar input:focus,.filter-bar select:focus{background:var(--surface-1);border-color:var(--border-medium)}.item-card,.dash-layout .book-card{box-shadow:var(--shadow-soft);border-radius:14px}.item-card:before,.dash-layout .book-card:before{content:"";background:0 0;height:3px;transition:background .2s;display:block}.item-card:hover:before,.dash-layout .book-card:hover:before{background:var(--primary)}.dash-layout .book-card__image{aspect-ratio:3/4;background:var(--surface-3);overflow:hidden}.dash-layout .book-card__image img{object-fit:cover;width:100%;height:100%;transition:transform .35s}.dash-layout .book-card:hover .book-card__image img{transform:scale(1.03)}.mcq-card{box-shadow:var(--shadow-soft);border-radius:14px;padding:1.25rem 1.35rem}.mcq-option{border-radius:12px;align-items:flex-start;gap:12px;padding:12px 14px;display:flex}.mcq-option__letter{background:var(--surface-3);border:1px solid var(--border-subtle);width:28px;height:28px;color:var(--text-primary);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.mcq-option:hover:not(.mcq-option--locked) .mcq-option__letter{background:var(--primary);color:var(--text-on-primary);border-color:var(--primary)}.mcq-option--correct .mcq-option__letter{background:var(--success);color:var(--text-on-primary);border-color:var(--success)}.mcq-option--wrong .mcq-option__letter{background:var(--danger);color:var(--text-on-primary);border-color:var(--danger)}.mcq-option__text{flex:1;padding-top:3px}.stat-card{border-top:3px solid var(--primary);border-radius:14px;transition:box-shadow .2s,transform .2s}.stat-card:hover{box-shadow:var(--shadow-lift)}.ui-kpi-row{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:1.5rem;display:grid}.ui-kpi{background:var(--surface-1);border:1px solid var(--border-subtle);box-shadow:var(--shadow-soft);border-left:3px solid var(--primary);border-radius:14px;padding:1.15rem 1.2rem}.ui-kpi__label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:12px;font-weight:600}.ui-kpi__value{color:var(--accent-amber);letter-spacing:-.03em;font-size:1.75rem;font-weight:800;line-height:1}.rank-highlight{background:var(--surface-2);border:1px solid var(--border-subtle);border-left:3px solid var(--primary);color:var(--text-primary);text-align:center;box-shadow:var(--shadow-card);border-radius:8px;margin-bottom:1.5rem;padding:1.5rem}.rank-podium__item--first{border-color:var(--primary);background:var(--surface-2);box-shadow:var(--shadow-card);transform:scale(1.02)}.flashcard-review{border:1px solid var(--border-subtle);background:var(--surface-1);border-radius:8px;min-height:300px;transition:border-color .2s,box-shadow 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.15s;display:flex}.dash-layout .menu-btn:hover{background:var(--surface-3);color:var(--text-primary)}.dash-layout .menu-dropdown{background:var(--surface-1);border:1px solid var(--border-subtle);min-width:140px;box-shadow:var(--shadow-lift);z-index:20;border-radius:10px;margin-top:4px;position:absolute;top:100%;right:0;overflow:hidden}.dash-layout .menu-item{width:100%;color:var(--text-secondary);cursor:pointer;text-align:left;background:0 0;border:none;align-items:center;gap:8px;padding:10px 12px;font-size:13px;font-weight:500;display:flex}.dash-layout .menu-item:hover{background:var(--surface-3);color:var(--text-primary)}.dash-layout .menu-item.danger{color:var(--danger)}.dash-layout .menu-item.danger:hover{background:var(--danger-bg)}.dash-layout .note-card__footer{border-top:1px solid var(--border-subtle);justify-content:space-between;align-items:center;margin-top:14px;padding-top:12px;display:flex}.dash-layout .note-card__subject{color:var(--text-muted);margin:6px 0 0;font-size:13px}.dash-layout .note-card__subject span{color:var(--text-secondary);font-weight:600}.dash-layout .type-badge.formula{background:var(--info-bg);color:var(--info)}.dash-layout .type-badge.shortcut{background:var(--warning-bg);color:var(--warning)}.dash-layout .type-badge.summary{background:var(--success-bg);color:var(--success)}.dash-layout .type-badge.general{background:var(--surface-3);color:var(--text-muted)}.data-row{box-shadow:var(--shadow-soft);border-radius:12px}.panel{box-shadow:var(--shadow-soft);border-radius:14px}.tab-bar{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:8px;width:fit-content;max-width:100%;padding:4px}.tab{border-radius:8px;padding:8px 16px}.timer-bar{box-shadow:var(--shadow-lift);border-radius:12px}@media (max-width:640px){.page-head__actions{width:100%}.page-head__actions .btn-primary,.page-head__actions .btn-ghost{flex:1;justify-content:center}.dash-layout .dash-footer{height:auto;min-height:var(--shell-footer-height);padding-top:var(--space-md);padding-bottom:var(--space-md)}.filter-bar{flex-direction:column;align-items:stretch}.filter-bar input,.filter-bar select{width:100%;min-width:0}}.dash-layout .sidebar__close{width:32px;height:32px;color:var(--text-muted);flex-shrink:0}.dash-layout .sidebar__close:hover{background:var(--shell-hover);color:var(--text-primary)}.dash-layout .sidebar__nav::-webkit-scrollbar-thumb{background:var(--shell-border)}.dash-layout .dash-header__menu-btn:hover{background:var(--shell-hover);color:var(--text-primary)}.dash-layout .dash-header__search svg,.dash-layout .dash-header__search-icon{color:var(--text-muted)}.dash-layout .dash-header__search-input::placeholder{color:var(--text-soft)}.dash-layout .dash-header__icon-btn:hover{background:var(--shell-hover);color:var(--text-primary)}.dash-layout .section-title__heading:before{content:"";background:var(--primary);vertical-align:middle;border-radius:1px;width:3px;height:16px;margin-right:10px;display:inline-block}.dash-layout .rank-podium{grid-template-columns:1fr 1.2fr 1fr;align-items:end;gap:14px;margin-bottom:1.75rem;display:grid}.dash-layout .rank-podium__item{text-align:center;background:var(--surface-1);border:1px solid var(--border-subtle);box-shadow:var(--shadow-soft);border-radius:14px;flex-direction:column;align-items:center;padding:1.1rem .85rem 1.25rem;transition:transform .2s,box-shadow .2s;display:flex}.dash-layout .rank-podium__item:hover{box-shadow:var(--shadow-lift);transform:translateY(-2px)}.dash-layout .rank-podium__item--first{border-color:var(--color-warning);min-height:200px;padding-top:1.35rem}@supports (color:color-mix(in lab, red, red)){.dash-layout .rank-podium__item--first{border-color:color-mix(in srgb,var(--color-warning)45%,var(--border-subtle))}}.dash-layout 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.rank-podium__points{color:var(--text-secondary);align-items:center;gap:5px;margin:0;font-size:.88rem;font-weight:600;display:inline-flex}.dash-layout .rank-podium__streak{color:var(--text-muted);margin:6px 0 0;font-size:.75rem}.dash-layout .leaderboard-list__heading{color:var(--text-primary);margin:0 0 .75rem;font-size:.95rem;font-weight:600}.dash-layout .leaderboard-row--me{border-color:var(--accent-1)}@supports (color:color-mix(in lab, red, red)){.dash-layout .leaderboard-row--me{border-color:color-mix(in srgb,var(--accent-1)45%,var(--border-subtle))}}.dash-layout .leaderboard-row--me{background:linear-gradient(90deg,var(--accent-1-soft)0%,var(--surface-1)45%)}.dash-layout .leaderboard-row__you{text-transform:uppercase;letter-spacing:.06em;background:var(--accent-1-soft);color:var(--accent-1);vertical-align:middle;border-radius:999px;margin-left:8px;padding:2px 8px;font-size:10px;font-weight:700;display:inline-block}.dash-layout 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.mcq-card:not(.mcq-card--correct):not(.mcq-card--wrong):hover{border-color:var(--border-medium);background:var(--surface-2);box-shadow:none}.study-page .empty-state .btn-primary{margin-top:1rem}.study-page .item-card__body h3,.study-page .item-card__head-title{font-size:var(--text-md);color:var(--text-primary);letter-spacing:-.02em;font-weight:600;line-height:var(--leading-tight);margin-bottom:4px}.study-page .item-card__desc,.study-page .item-card__meta{font-size:var(--text-sm);line-height:var(--leading-normal);color:var(--text-muted)}.study-page .item-card__head{justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:8px;display:flex}.study-page .panel{border-color:var(--shell-border)}.study-page .data-list{gap:10px}.study-page .data-list .item-card{width:100%}@media (max-width:1023px){.dash-layout .sidebar-overlay{background:var(--backdrop-medium);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.dash-layout .sidebar{z-index:var(--z-shell-raised)}.dash-layout .sidebar__section{padding:.25rem .75rem}.dash-layout .sidebar__section-label{padding:.65rem .85rem .35rem}.dash-layout .dash-header{z-index:var(--z-shell-raised)}.dash-layout .sidebar__footer{height:calc(var(--shell-footer-height) + env(safe-area-inset-bottom,0px));min-height:calc(var(--shell-footer-height) + env(safe-area-inset-bottom,0px));padding-bottom:env(safe-area-inset-bottom,0px)}.dash-layout .sidebar__logout{min-height:44px}}@media (max-width:768px){.dash-layout .dash-header__search--open{background:var(--shell-header);border-bottom-color:var(--shell-border)}.dash-layout .dash-header__search-toggle--active{background:var(--surface-2);color:var(--text-primary)}.dash-layout .dash-header__dropdown{background:var(--surface-2);border-color:var(--border-medium)}.dash-layout .dash-content{padding-bottom:1.25rem}.dash-layout.dash-layout--sidebar-open .dash-header__menu-btn{background:var(--surface-2);color:var(--text-primary)}}@media 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p{color:var(--text-muted);margin-bottom:12px;font-size:13px;line-height:1.5}.test-adaptive-panel__row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.test-adaptive-panel__select{flex:1;min-width:180px}.test-adaptive-panel__select.study-page__custom-select{position:relative}.test-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;display:grid}.test-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-left:3px solid var(--primary);border-radius:12px;flex-direction:column;padding:1.1rem;transition:border-color .18s,background .18s,transform 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10px;margin-bottom:12px;padding:10px 12px;display:flex}.test-card__score-label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);width:100%;font-size:11px;font-weight:600}.test-card__score strong{color:var(--success);font-size:1.1rem}.test-card__score-pct{color:var(--success);font-size:13px;font-weight:600}.test-card__actions{margin-top:auto}.test-card__btn{justify-content:center;align-items:center;gap:8px;width:100%;min-height:40px;display:inline-flex}.exam-toolbar{background:var(--surface-1);border:1px solid var(--border-subtle);top:var(--shell-bar-height,56px);z-index:12;border-radius:12px;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;margin-bottom:12px;padding:12px 14px;display:grid;position:sticky}.exam-toolbar__back{align-items:center;gap:4px;min-height:38px;padding:0 10px;font-size:13px;display:inline-flex}.exam-toolbar__center{text-align:center;min-width:0}.exam-toolbar__title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:600;line-height:1.3;overflow:hidden}.exam-toolbar__sub{color:var(--text-muted);margin-top:2px;font-size:12px}.exam-toolbar__timer{background:var(--primary-soft);color:var(--accent-amber);font-variant-numeric:tabular-nums;border-radius:8px;flex-shrink:0;align-items:center;gap:6px;padding:8px 12px;font-size:15px;font-weight:800;display:inline-flex}.exam-toolbar__timer--urgent{background:var(--danger-bg);color:var(--danger);animation:1s ease-in-out infinite examPulse}.exam-toolbar__open{color:var(--text-muted);background:var(--surface-2);border-radius:8px;flex-shrink:0;padding:8px 10px;font-size:12px}.exam-toolbar__score{color:var(--success);background:var(--success-bg);border-radius:8px;flex-shrink:0;padding:8px 12px;font-size:14px;font-weight:700}@keyframes examPulse{0%,to{opacity:1}50%{opacity:.75}}.exam-progress{margin-bottom:12px}.exam-progress__bar,.exam-progress__time{background:var(--surface-3);border-radius:999px;height:4px;overflow:hidden}.exam-progress__time{height:3px;margin-top:4px}.exam-progress__fill{border-radius:inherit;background:var(--primary);height:100%;transition:width .25s;display:block}.exam-progress__time-fill{border-radius:inherit;background:var(--accent-amber);height:100%;transition:width 1s linear;display:block}.exam-progress__time-fill--urgent{background:var(--danger)}.exam-nav-dots{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:10px;flex-wrap:wrap;gap:6px;margin-bottom:1rem;padding:10px 12px;display:flex}.exam-nav-dot{background:var(--surface-3);cursor:pointer;border:none;border-radius:50%;width:10px;height:10px;padding:0;transition:background .15s,transform .15s}.exam-nav-dot:hover{background:var(--border-strong);transform:scale(1.15)}.exam-nav-dot--done{background:var(--primary)}.exam-section-label{margin:1.25rem 0 .75rem}.exam-section-label h2{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;font-size:14px;font-weight:600}.exam-result-hero{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:14px;align-items:center;gap:1.25rem;margin-bottom:0;padding:1.25rem;display:flex}.exam-result-hero__ring{--pct:0;background:conic-gradient(var(--success)calc(var(--pct)*1%),var(--surface-3)0);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:96px;height:96px;display:flex;position:relative}.exam-result-hero__ring:before{content:"";background:var(--surface-1);border-radius:50%;position:absolute;inset:6px}.exam-result-hero__pct{z-index:1;color:var(--success);font-size:1.35rem;font-weight:800;position:relative}.exam-result-hero__info{min-width:0}.exam-result-hero__badge{text-transform:capitalize;align-items:center;gap:6px;margin-bottom:8px;display:inline-flex}.exam-result-hero__title{color:var(--text-primary);margin-bottom:6px;font-size:clamp(1.1rem,3vw,1.35rem);font-weight:700;line-height:1.3}.exam-result-hero__score{color:var(--text-secondary);margin-bottom:4px;font-size:15px}.exam-result-hero__meta{color:var(--text-muted);font-size:13px}.exam-timer-bar{top:var(--shell-bar-height,56px);z-index:10;background:var(--popover-bg);border:1px solid var(--popover-border);border-radius:8px;flex-wrap:wrap;align-items:center;gap:8px 16px;margin-bottom:1rem;padding:12px 16px;font-size:14px;display:flex;position:sticky}.exam-timer-bar__meta{color:var(--text-muted)}.exam-timer-bar__meta strong{color:var(--text-primary)}.exam-timer-bar__countdown{font-variant-numeric:tabular-nums;color:var(--teal-400);font-size:1.125rem;font-weight:800}.exam-timer-bar__countdown--urgent{color:var(--danger)}.exam-session__hint{color:var(--text-muted);margin-bottom:1rem;font-size:14px}.exam-card{background:var(--surface-1);border:1px solid var(--border-subtle);scroll-margin-top:calc(var(--shell-bar-height,56px) + 80px);border-radius:12px;margin-bottom:12px;padding:1rem 1.1rem}.exam-card--active{border-left:3px solid var(--primary)}.exam-card--review.exam-card--correct{border-left:3px solid var(--success)}.exam-card--review.exam-card--wrong{border-left:3px solid var(--danger)}.exam-card__head{justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.exam-card__num{text-transform:uppercase;letter-spacing:.05em;color:var(--accent-amber);font-size:12px;font-weight:700}.exam-card__of{color:var(--text-muted);font-size:12px}.exam-card__verdict{align-items:center;gap:5px;font-size:12px;font-weight:600;display:inline-flex}.exam-card__verdict--ok{color:var(--success)}.exam-card__verdict--bad{color:var(--danger)}.exam-card__verdict--skip{color:var(--text-muted)}.exam-card__question{color:var(--text-primary);margin-bottom:12px;font-size:15px;font-weight:600;line-height:1.55}.exam-options{flex-direction:column;gap:8px;display:flex}.exam-option{border:1px solid var(--border-subtle);background:var(--surface-2);width:100%;color:var(--text-secondary);text-align:left;cursor:pointer;border-radius:10px;align-items:flex-start;gap:12px;min-height:48px;padding:12px 14px;font-family:inherit;font-size:14px;transition:border-color .15s,background .15s,color .15s;display:flex}.exam-option:hover:not(.exam-option--review){border-color:var(--border-medium);background:var(--surface-3);color:var(--text-primary)}.exam-option--selected{border-color:var(--primary);background:var(--primary-soft);color:var(--text-primary)}.exam-option--selected .exam-option__letter{background:var(--primary);color:var(--text-on-primary);border-color:var(--primary)}.exam-option--review{cursor:default}.exam-option--correct{border-color:var(--success-border-md);background:var(--success-bg);color:var(--success)}.exam-option--correct .exam-option__letter{background:var(--success);color:var(--text-on-primary);border-color:var(--success)}.exam-option--wrong{border-color:var(--danger-border);background:var(--danger-bg);color:var(--danger)}.exam-option--wrong .exam-option__letter{background:var(--danger);color:var(--text-on-primary);border-color:var(--danger)}.exam-option__letter{background:var(--surface-1);border:1px solid var(--border-medium);width:28px;height:28px;color:var(--text-muted);border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.exam-option__text{flex:1;justify-content:space-between;align-items:flex-start;gap:8px;padding-top:3px;line-height:1.5;display:flex}.exam-option__check{color:var(--success);flex-shrink:0;margin-top:2px}.exam-option:hover{background:var(--surface-2)}.exam-option input{flex-shrink:0;width:18px;height:18px;margin-top:3px}.exam-solution-option{border-radius:6px;margin-bottom:6px;padding:10px 12px;line-height:1.45}.exam-solution-option--neutral{background:var(--surface-2);color:var(--text-secondary)}.exam-solution-option--correct{background:var(--correct-bg);color:var(--correct-text);font-weight:600}.exam-solution-option--wrong{background:var(--incorrect-bg);color:var(--incorrect-text)}.exam-solution-text--correct{color:var(--correct-text);font-weight:700}.exam-solution-text--neutral{color:var(--text-secondary)}.exam-verdict{margin-top:8px;font-weight:700}.exam-verdict--correct{color:var(--success)}.exam-verdict--wrong{color:var(--danger)}.exam-explanation{color:var(--text-muted);background:var(--surface-2);border-radius:8px;align-items:flex-start;gap:8px;margin-top:12px;padding:10px 12px;font-size:13px;line-height:1.55;display:flex}.exam-explanation svg{color:var(--accent-amber);flex-shrink:0;margin-top:2px}.exam-result-score{color:var(--brand-teal);font-size:clamp(2rem,8vw,2.375rem);font-weight:800;line-height:1.1}.exam-result-meta{color:var(--text-muted)}.exam-actions{flex-wrap:wrap;gap:10px;margin-top:1.25rem;display:flex}.exam-actions--sticky{z-index:11;background:var(--floating-panel-bg);border:1px solid var(--border-subtle);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:12px;margin-top:1rem;padding:12px;position:sticky;bottom:12px}.exam-actions .btn-primary,.exam-actions .btn-ghost{align-items:center;gap:8px;min-height:44px;display:inline-flex}.stat-card__chart-wrap{width:100%;height:220px;min-height:180px;position:relative}.stat-card__center-text--sm{font-size:1rem}.dash-layout .note-card--row{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.dash-layout .note-card__meta-row{flex-wrap:wrap;gap:8px;margin-top:8px;display:flex}.dash-layout .note-card__actions{flex-shrink:0;gap:6px;display:flex}.item-card--relative{position:relative}.item-card__head-row{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.dropdown-menu{background:var(--surface-1);border:1px solid var(--border-subtle);box-shadow:var(--shadow-lift);z-index:10;border-radius:8px;min-width:130px;position:absolute;top:44px;right:12px}.dropdown-menu__item--danger{color:var(--danger)}.discussion-back{margin-bottom:12px}.chat-message__author{opacity:.7;margin-bottom:4px;font-size:11px;font-weight:600}.content-card--spaced{margin-bottom:16px}.plan-list{flex-direction:column;gap:12px;display:flex}.plan-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-left:3px solid var(--primary);border-radius:12px;transition:border-color .18s,background .18s}.plan-card--pending{border-left-color:var(--warning)}.plan-card--expired{border-left-color:var(--danger)}.plan-card--completed{border-left-color:var(--success);opacity:.92}.plan-card:hover{border-color:var(--border-medium);background:var(--surface-2)}.plan-card__body{padding:1rem 1.15rem}.plan-card__head{align-items:flex-start;gap:12px;display:flex}.plan-card__check{background:var(--surface-2);width:40px;height:40px;color:var(--text-muted);cursor:pointer;border:none;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;transition:background .15s,color .15s;display:flex}.plan-card__check:hover{background:var(--surface-3);color:var(--text-primary)}.plan-card--completed .plan-card__check{color:var(--success);background:var(--success-bg)}.plan-card__content{flex:1;min-width:0}.plan-card__title{color:var(--text-primary);letter-spacing:-.01em;margin-bottom:6px;font-size:15px;font-weight:600;line-height:1.4}.plan-card__title--done{color:var(--text-muted);text-decoration:line-through}.plan-card__date{color:var(--text-muted);align-items:center;gap:6px;margin:0;font-size:13px;display:inline-flex}.plan-card__badge{flex-shrink:0;margin-top:2px}.plan-card__footer{border-top:1px solid var(--border-subtle);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:14px;padding-top:14px;display:flex}.plan-card__countdown{align-items:center;gap:6px;margin:0;font-size:13px;font-weight:600;display:inline-flex}.plan-card__countdown--neutral{color:var(--text-muted)}.plan-card__countdown--warning{color:var(--warning)}.plan-card__countdown--urgent,.plan-card__countdown--danger{color:var(--danger)}.plan-card__countdown--success{color:var(--success)}.plan-card__actions{flex-wrap:wrap;gap:8px;display:flex}.plan-card__actions .btn-ghost{align-items:center;gap:6px;min-height:36px;padding:6px 12px;font-size:13px;display:inline-flex}@media (max-width:640px){.plan-card__head{flex-wrap:wrap}.plan-card__badge{margin-left:52px}.plan-card__footer{flex-direction:column;align-items:stretch}.plan-card__actions{width:100%}.plan-card__actions .btn-ghost{flex:1;justify-content:center;min-height:44px}}@media (max-width:768px){.dash-layout .dash-content{padding-left:max(1rem,env(safe-area-inset-left));padding-right:max(1rem,env(safe-area-inset-right));overflow-x:hidden}.dash-layout .page-shell{min-width:0}.stats-grid{grid-template-columns:1fr;gap:12px}.item-grid,.book-grid,.dash-layout .notes-grid{grid-template-columns:1fr}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.study-page__stats{grid-template-columns:repeat(2,minmax(0,1fr))}.data-row{flex-wrap:wrap;align-items:flex-start;padding:12px 14px}.data-row__action{width:100%;margin-top:6px}.data-row__action .btn-primary,.data-row__action .btn-ghost{justify-content:center;width:100%}.page-head{gap:12px}.page-head__title{font-size:clamp(1.35rem,5vw,1.75rem)}.mcq-pagination{justify-content:center}.mcq-pagination button,.pagination-bar button{min-width:44px;min-height:44px}.dash-layout .rank-podium{grid-template-columns:1fr;align-items:stretch}.dash-layout .rank-podium__item--first,.dash-layout .rank-podium__item--second,.dash-layout .rank-podium__item--third{min-height:unset}.dash-layout .books-hero{flex-direction:column;align-items:stretch;gap:1rem}.chat-message{max-width:92%}.chat-main{min-height:360px}.chat-input-bar{flex-wrap:wrap}.chat-input-bar .btn-primary{flex:1;justify-content:center;min-height:44px}.modal{border-radius:12px;max-height:calc(100dvh - 2rem)}.modal__body{padding:1rem}.stat-card__chart-wrap{min-height:200px}.exam-timer-bar{top:calc(var(--shell-bar-height,56px) + env(safe-area-inset-top,0px))}.exam-actions{flex-direction:column}.exam-actions .btn-primary,.exam-actions .btn-ghost{justify-content:center;width:100%}.exam-toolbar{text-align:center;grid-template-columns:1fr}.exam-toolbar__back{justify-self:start}.exam-toolbar__timer,.exam-toolbar__open,.exam-toolbar__score{justify-self:center}.exam-result-hero{text-align:center;flex-direction:column}.test-adaptive-panel{flex-direction:column}.test-adaptive-panel__row{flex-direction:column;align-items:stretch}.test-adaptive-panel__row .btn-primary{justify-content:center;width:100%}.test-grid{grid-template-columns:1fr}.dash-layout .note-card--row{flex-direction:column}.dash-layout .note-card__actions{flex-wrap:wrap;width:100%}.dash-layout .note-card__actions button{flex:1;min-height:44px}.dash-layout .note-card__btn{min-height:44px;padding:8px 14px}.flashcard-review{max-width:100%;min-height:240px;padding:1.5rem 1rem}.flashcard-actions{flex-wrap:wrap;justify-content:center}.flashcard-actions button{min-height:44px}.study-page__filters{padding:.85rem 1rem}.form-group input,.form-group select,.form-group textarea,.btn-primary,.btn-ghost,.btn-danger{min-height:44px}.item-card .btn-primary{justify-content:center;width:100%}.item-card__actions{flex-direction:column}.item-card__actions button{justify-content:center;width:100%}.dash-layout .profile__form-grid{grid-template-columns:1fr}}@media (max-width:480px){.quick-grid{grid-template-columns:1fr 1fr}.study-page__stats{grid-template-columns:1fr}.welcome-banner{padding:1rem}.welcome-banner h1{font-size:1.35rem}.tab-bar{-webkit-overflow-scrolling:touch;scrollbar-width:none;flex-wrap:nowrap;overflow-x:auto}.tab-bar::-webkit-scrollbar{display:none}.tab-bar button{flex-shrink:0;min-height:44px}.dash-layout .dash-content{padding-top:.75rem;padding-bottom:1rem}}.billing-status__row{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.billing-status__label{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);margin-bottom:4px;font-size:12px;font-weight:600}.billing-status__value{color:var(--text-primary);font-size:1.25rem;font-weight:700}.billing-status__meta{color:var(--text-muted);margin-top:4px;font-size:13px}.billing-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-bottom:20px;display:grid}.billing-plan{border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--surface-1);flex-direction:column;gap:10px;padding:1.25rem;display:flex;position:relative}.billing-plan--selected{border-color:var(--text-primary);box-shadow:0 0 0 1px var(--text-primary)}.billing-plan--popular{border-color:var(--accent-amber)}.billing-plan__badge{text-transform:uppercase;letter-spacing:.06em;background:var(--accent-amber);color:var(--text-on-primary);border-radius:999px;padding:4px 8px;font-size:10px;font-weight:700;position:absolute;top:12px;right:12px}.billing-plan__desc{color:var(--text-muted);font-size:13px;line-height:1.5}.billing-plan__price span{color:var(--text-primary);font-size:1.5rem;font-weight:800}.billing-plan__price small{color:var(--text-muted);margin-top:2px;font-size:12px;display:block}.billing-plan__features{color:var(--text-secondary);flex-direction:column;flex:1;gap:6px;margin:0;padding:0;font-size:13px;list-style:none;display:flex}.billing-providers{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px;display:grid}.billing-provider{border:1px solid var(--border-subtle);border-radius:var(--radius-md);background:var(--surface-2);cursor:pointer;justify-content:center;align-items:center;gap:8px;padding:12px;font-weight:600;display:flex}.billing-provider--active{border-color:var(--text-primary);background:var(--surface-1)}.billing-checkout__hint{color:var(--text-muted);margin-bottom:14px;font-size:13px}.billing-mock{border-radius:var(--radius-md);border:1px dashed var(--border-medium);background:var(--surface-2);flex-direction:column;gap:10px;margin-top:14px;padding:12px;font-size:13px;display:flex}.billing-history{margin-top:24px}.billing-callback{justify-content:center;align-items:center;min-height:50vh;display:flex}.billing-callback__card{text-align:center;border:1px solid var(--border-subtle);border-radius:var(--radius-lg);background:var(--surface-1);flex-direction:column;align-items:center;gap:12px;max-width:420px;padding:2rem;display:flex}.billing-callback__card--success svg{color:var(--correct-text)}.billing-callback__card--failed svg{color:var(--incorrect-text)}.billing-amount-due{color:var(--text-secondary);margin:0 0 16px;font-size:15px}.billing-amount-due strong{color:var(--text-primary)}.billing-accounts{border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--surface-2,var(--surface-1));flex-direction:column;gap:10px;margin-bottom:16px;padding:14px;display:flex}.billing-account-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.billing-account-row__label{text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);margin:0;font-size:12px}.billing-account-row__sub{color:var(--text-secondary);margin:2px 0 0;font-size:13px}.billing-account-row__value{color:var(--text-primary);margin:4px 0 0;font-family:ui-monospace,monospace;font-size:16px;font-weight:600}.billing-copy-btn{border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--surface-1);width:32px;height:32px;color:var(--text-secondary);cursor:pointer;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.billing-copy-btn:hover{color:var(--text-primary);border-color:var(--border-strong,var(--border-subtle))}.billing-instructions{border-radius:var(--radius-md);background:var(--accent-primary,#0d9488);margin:0 0 16px;padding:12px}@supports (color:color-mix(in lab, red, red)){.billing-instructions{background:color-mix(in srgb,var(--accent-primary,#0d9488)8%,transparent)}}.billing-instructions{color:var(--text-secondary);font-size:14px;line-height:1.5}.billing-upload{flex-direction:column;gap:10px;display:flex}.billing-upload__input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.billing-upload__label{border:1px dashed var(--border-subtle);border-radius:var(--radius-md);cursor:pointer;color:var(--text-secondary);align-items:center;gap:8px;padding:12px 16px;font-size:14px;transition:border-color .15s,color .15s;display:inline-flex}.billing-upload__label:hover{border-color:var(--accent-primary,#0d9488);color:var(--text-primary)}.billing-upload__preview{object-fit:contain;border-radius:var(--radius-md);border:1px solid var(--border-subtle);max-width:280px;max-height:200px}.billing-checkout--muted{opacity:.92}.billing-coming-soon{color:var(--text-secondary);align-items:flex-start;gap:14px;display:flex}.billing-coming-soon svg{color:var(--text-muted);flex-shrink:0;margin-top:2px}.billing-checkout__hint--warn{color:var(--incorrect-text,#b91c1c)}.billing-details{flex-direction:column;gap:16px;display:flex}.billing-details--empty{border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--surface-2,var(--surface-1));color:var(--text-secondary);flex-direction:row;align-items:flex-start;gap:12px;padding:14px 16px;font-size:14px}.billing-details--empty p{margin:0}.billing-details__header{flex-direction:column;gap:6px;display:flex}.billing-details__grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;display:grid}.billing-details__card{border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:var(--surface-2,var(--surface-1));padding:16px}.billing-details__card--wide{grid-column:1/-1}.billing-details__card-head{color:var(--text-primary);align-items:center;gap:8px;margin-bottom:10px;display:flex}.billing-details__card-head 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.primary{background:var(--brand-teal);color:var(--text-on-primary)}.view-modal{position:relative}.modal-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;font-size:20px;position:absolute;top:14px;right:16px}.modal-close:hover{color:var(--text-on-primary)}.view-title{color:var(--text-on-primary);margin-bottom:10px;font-size:22px;font-weight:700}.note-meta{color:var(--text-muted);margin-bottom:8px;font-size:14px}.note-meta span{color:var(--panel-text)}.note-content{background:var(--deep-navy);color:var(--panel-text);border-radius:10px;margin-top:16px;padding:14px;line-height:1.6}.toggle-tabs{border:1px solid var(--legacy-light-border);border-radius:30px;margin:20px 0;display:inline-flex;overflow:hidden}.toggle-tab{color:var(--legacy-light-text);cursor:pointer;background:#fff;border:none;padding:10px 28px;font-size:14px;font-weight:600;transition:all .25s}.toggle-tab:hover{background:var(--legacy-light-bg)}.toggle-tab--active{background:var(--teal-400);color:var(--text-on-primary)}.pdf-modal iframe::-webkit-scrollbar{width:8px}.pdf-modal iframe::-webkit-scrollbar-thumb{background-color:var(--shadow-deep);border-radius:4px}.vs-page{width:100%}.vs-hero{justify-content:space-between;align-items:center;gap:var(--space-xl);padding:var(--space-2xl);margin-bottom:var(--space-xl);border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--teal-soft-bg-md)0%,var(--accent-blue-soft)55%,var(--accent-violet-soft)100%);border:1px solid var(--brand-glow-soft);display:flex}.vs-hero__content{flex:1;max-width:640px}.vs-hero__badge{margin-bottom:var(--space-md);border-radius:var(--radius-full);background:var(--teal-soft-bg-lg);color:var(--teal-300);letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:6px;padding:6px 12px;font-size:11px;font-weight:700;display:inline-flex}.vs-hero__content h1{margin-bottom:var(--space-sm);font-size:clamp(1.75rem,3vw,2.25rem)}.vs-hero__content p{color:var(--mist);font-size:15px;line-height:1.7}.vs-hero__stats{gap:var(--space-sm);flex-direction:column;flex-shrink:0;display:flex}.vs-stat-pill{border-radius:var(--radius-md);background:var(--overlay-input);border:1px solid var(--glass-bg-strong);min-width:180px;color:var(--cloud);align-items:center;gap:10px;padding:12px 16px;font-size:13px;display:flex}.vs-stat-pill svg{color:var(--teal-400);flex-shrink:0}.vs-layout{gap:var(--space-xl);grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);align-items:start;display:grid}.vs-layout>aside{top:calc(var(--shell-bar-height,64px) + var(--space-xl,32px));position:sticky}.vs-library-scroll{max-height:calc(100vh - var(--shell-bar-height,64px) - 140px);scrollbar-width:thin;scrollbar-color:var(--border-medium)transparent;padding-right:4px;overflow:hidden auto}.vs-library-scroll::-webkit-scrollbar{width:5px}.vs-library-scroll::-webkit-scrollbar-track{background:0 0}.vs-library-scroll::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:99px}@media (max-width:1024px){.vs-layout{grid-template-columns:1fr}.vs-hero{flex-direction:column;align-items:flex-start}.vs-hero__stats{flex-flow:wrap;width:100%}.vs-stat-pill{flex:1;min-width:140px}}.vs-panel{padding:var(--space-lg);border-radius:var(--radius-lg);background:var(--glass-bg-muted);border:1px solid var(--glass-bg-hover)}.vs-panel+.vs-panel{margin-top:var(--space-md)}.vs-panel__title{color:var(--white);margin-bottom:var(--space-md);align-items:center;gap:8px;font-size:15px;font-weight:700;display:flex}.vs-panel__subtitle{color:var(--graphite);margin-top:-8px;margin-bottom:var(--space-md);font-size:13px}.vs-input-row{gap:var(--space-sm);display:flex}@media (max-width:640px){.vs-input-row{flex-direction:column}}.vs-input-wrap{flex:1;position:relative}.vs-input-wrap svg{color:var(--graphite);pointer-events:none;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.vs-input{border-radius:var(--radius-md);background:var(--overlay-input-strong);border:1px solid var(--glass-bg-strong);width:100%;color:var(--white);transition:border-color var(--duration-fast)ease,box-shadow var(--duration-fast)ease;padding:13px 16px 13px 42px;font-size:14px}.vs-input:focus{border-color:var(--teal);box-shadow:0 0 0 3px var(--primary-soft);outline:none}.vs-input::placeholder{color:var(--graphite)}.vs-submit{border-radius:var(--radius-md);background:linear-gradient(135deg,var(--teal),var(--teal-400));color:var(--white);white-space:nowrap;box-shadow:0 4px 18px var(--teal-shadow-md);transition:transform var(--duration-fast)ease,box-shadow var(--duration-fast)ease;justify-content:center;align-items:center;gap:8px;padding:13px 22px;font-size:14px;font-weight:700;display:inline-flex}.vs-submit:hover:not(:disabled){box-shadow:0 6px 22px var(--teal-shadow-xl);transform:translateY(-1px)}.vs-submit:disabled{opacity:.55;cursor:not-allowed}.vs-feedback{margin-top:var(--space-sm);min-height:20px;font-size:13px}.vs-feedback--ok{color:var(--teal-300)}.vs-feedback--warn{color:var(--amber-light)}.vs-feedback--muted{color:var(--graphite)}.vs-tags{margin-top:var(--space-md);flex-wrap:wrap;gap:8px;display:flex}.vs-tag{border-radius:var(--radius-full);background:var(--glass-bg);border:1px solid var(--glass-bg-hover);color:var(--mist);padding:5px 11px;font-size:11px;font-weight:600}.vs-steps{gap:var(--space-md);flex-direction:column;display:flex}.vs-step{gap:12px;display:flex}.vs-step__num{background:var(--teal-soft-bg-lg);width:28px;height:28px;color:var(--teal-300);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:800;display:flex}.vs-step__body h4{margin-bottom:4px;font-size:14px;font-weight:600}.vs-step__body p{color:var(--graphite);font-size:13px;line-height:1.55}.vs-tips{flex-direction:column;gap:10px;display:flex}.vs-tip{color:var(--mist);gap:10px;font-size:13px;line-height:1.5;display:flex}.vs-tip svg{color:var(--teal-400);flex-shrink:0;margin-top:2px}.vs-section-head{justify-content:space-between;align-items:center;gap:var(--space-md);margin-bottom:var(--space-md);display:flex}.vs-section-head h2{font-size:18px}.vs-section-head p{color:var(--graphite);margin-top:4px;font-size:13px}.vs-grid{gap:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(240px,1fr));display:grid}.vs-card{text-align:left;padding:var(--space-md);border-radius:var(--radius-md);background:var(--glass-bg-muted);border:1px solid var(--glass-bg-hover);transition:all var(--duration-fast)var(--ease-out);cursor:pointer;flex-direction:column;display:flex}.vs-card:hover{border-color:var(--teal-shadow-lg);box-shadow:var(--shadow-md);transform:translateY(-3px)}.vs-card--active{border-color:var(--teal-border-lg);background:var(--teal-soft-bg)}.vs-card__top{justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:10px;display:flex}.vs-card__title{color:var(--white);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;font-weight:600;line-height:1.4;display:-webkit-box;overflow:hidden}.vs-status{border-radius:var(--radius-full);text-transform:uppercase;letter-spacing:.04em;flex-shrink:0;padding:4px 8px;font-size:10px;font-weight:700}.vs-status--pending{background:var(--warning-bg);color:var(--amber-light)}.vs-status--processing{background:var(--sky-soft-bg);color:var(--sky)}.vs-status--completed{background:var(--success-bg);color:var(--status-success-text)}.vs-status--failed{background:var(--status-error-bg);color:var(--status-error-text)}.vs-card__url{color:var(--graphite);-webkit-line-clamp:1;-webkit-box-orient:vertical;margin-bottom:10px;font-size:11px;display:-webkit-box;overflow:hidden}.vs-card__progress{color:var(--teal-300);margin-bottom:8px;font-size:12px}.vs-card__preview{color:var(--mist);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:12px;line-height:1.5;display:-webkit-box;overflow:hidden}.vs-empty{padding:var(--space-3xl)var(--space-xl);text-align:center;border-radius:var(--radius-lg);border:1px dashed var(--glass-border-hover);background:var(--glass-bg-faint)}.vs-empty svg{color:var(--graphite);margin:0 auto 16px}.vs-empty h3{margin-bottom:8px;font-size:17px}.vs-empty p{color:var(--graphite);max-width:360px;margin:0 auto;font-size:14px}.vs-pagination{justify-content:space-between;align-items:center;gap:var(--space-md);margin-top:var(--space-lg);padding-top:var(--space-md);border-top:1px solid var(--border-subtle);display:flex}.vs-pagination__info{color:var(--graphite);white-space:nowrap;font-size:13px}.vs-pagination__controls{gap:6px;display:flex}.vs-pagination__btn{border-radius:var(--radius-sm);border:1px solid var(--border-medium);background:var(--surface-1);color:var(--text-secondary);cursor:pointer;transition:background var(--duration-fast),border-color var(--duration-fast);align-items:center;gap:4px;padding:6px 12px;font-size:13px;font-weight:500;display:inline-flex}.vs-pagination__btn:hover:not(:disabled){background:var(--surface-hover);border-color:var(--border-strong);color:var(--text-primary)}.vs-pagination__btn:disabled{opacity:.35;cursor:not-allowed}.vs-pagination__btn--active{background:var(--primary);border-color:var(--primary);color:var(--text-on-primary)}.vs-detail{padding:var(--space-xl);border-radius:var(--radius-lg);background:var(--glass-bg-muted);border:1px solid var(--glass-bg-strong);margin-bottom:var(--space-xl)}.vs-detail__head{justify-content:space-between;align-items:flex-start;gap:var(--space-md);margin-bottom:var(--space-md);display:flex}.vs-detail__head h2{margin-bottom:6px;font-size:22px}.vs-detail__link{color:var(--graphite);word-break:break-all;font-size:13px}.vs-detail__link:hover{color:var(--teal-300)}.vs-close{border-radius:var(--radius-sm);background:var(--glass-bg);border:1px solid var(--glass-bg-strong);color:var(--mist);margin-bottom:var(--space-md);align-items:center;gap:6px;padding:8px 12px;font-size:13px;font-weight:500;display:inline-flex}.vs-close:hover{color:var(--white);background:var(--glass-border)}.vs-progress-bar{border-radius:var(--radius-md);background:var(--overlay-input);border:1px solid var(--glass-bg-hover);color:var(--mist);margin-bottom:var(--space-lg);padding:12px 16px;font-size:13px}.vs-progress-bar--error{border-color:var(--status-error-border);background:var(--danger-bg-soft);color:var(--status-error-text-strong)}.vs-block{margin-top:var(--space-xl)}.vs-block h3{margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:1px solid var(--glass-bg-hover);align-items:center;gap:8px;font-size:16px;display:flex}.vs-block p,.vs-block li{color:var(--mist);font-size:14px;line-height:1.7}.vs-block ul{padding-left:20px}.vs-block ul li+li{margin-top:8px}.vs-flash-grid{gap:var(--space-md);grid-template-columns:repeat(auto-fill,minmax(220px,1fr));display:grid}.vs-flash{padding:var(--space-md);border-radius:var(--radius-md);background:var(--input-bg);border:1px solid var(--glass-bg-hover)}.vs-flash__q{color:var(--white);margin-bottom:8px;font-size:14px;font-weight:600}.vs-flash__a{color:var(--mist);font-size:13px}.vs-mcq{padding:var(--space-md);border-radius:var(--radius-md);background:var(--input-bg);border:1px solid var(--glass-bg-hover)}.vs-mcq+.vs-mcq{margin-top:var(--space-md)}.vs-mcq__stem{color:var(--white);margin-bottom:12px;font-size:14px;font-weight:600}.vs-mcq__opt{border-radius:var(--radius-sm);background:var(--glass-bg);color:var(--mist);margin-bottom:8px;padding:10px 12px;font-size:13px}.vs-mcq__opt--correct{background:var(--success-bg);color:var(--status-success-text-soft);border:1px solid var(--success-border)}.utility-page{background:var(--bg-base);justify-content:center;align-items:center;gap:var(--space-md);min-height:100vh;padding:var(--space-lg);flex-direction:column;display:flex}.utility-page__code{color:var(--teal);font-size:64px;font-weight:800;font-family:var(--font-display)}.utility-page__title{color:var(--text-primary);font-size:20px;font-family:var(--font-display)}.utility-page__text{color:var(--text-muted);text-align:center;max-width:400px;font-size:14px}.utility-page__actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:8px;display:flex}.btn-primary{background:var(--teal);color:var(--text-on-primary);border-radius:var(--radius-sm);cursor:pointer;border:none;align-items:center;padding:10px 24px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.btn-ghost{background:var(--glass-bg-muted);color:var(--text-secondary);border-radius:var(--radius-sm);border:1px solid var(--glass-bg-strong);align-items:center;padding:10px 24px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.btn-ghost:hover{background:var(--glass-bg-hover);border-color:var(--glass-border-hover)}.vs-mcq__btn{color:var(--teal-300);background:0 0;margin-top:8px;padding:0;font-size:13px;font-weight:600}.vs-mcq__btn:hover{color:var(--teal-400)}.vs-mcq__explain{color:var(--graphite);margin-top:10px;font-size:13px}.vs-retry{border-radius:var(--radius-sm);background:var(--status-error-bg-soft);color:var(--status-error-text-strong);align-items:center;gap:6px;margin-top:12px;padding:8px 14px;font-size:13px;font-weight:600;display:inline-flex}.vs-retry:hover{background:var(--status-error-bg-hover)}.vs-loading{color:var(--graphite);align-items:center;gap:10px;font-size:14px;display:flex}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}