@import"https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Sora:wght@600;700;800&display=swap";:root{--brand-primary: #1d4ed8;--brand-primary-dark: #1e3a8a;--brand-primary-light: #eff6ff;--brand-accent: #ea580c;--brand-accent-dark: #c2410c;--brand-accent-light: #fff7ed;--brand-tertiary: #7c3aed;--brand-tertiary-dark: #6d28d9;--brand-tertiary-light: #f5f3ff;--capsule-brand: var(--brand-primary);--capsule-brand-bg: var(--brand-primary-light);--gradient-hero: linear-gradient(135deg, #1d4ed8 0%, #4338ca 55%, #7c3aed 100%);--gradient-cta: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);--gradient-wallet: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);--gradient-tile-blue: linear-gradient(135deg, rgba(29, 78, 216, .1) 0%, rgba(29, 78, 216, .02) 100%);--gradient-tile-orange: linear-gradient(135deg, rgba(234, 88, 12, .1) 0%, rgba(234, 88, 12, .02) 100%);--gradient-tile-purple: linear-gradient(135deg, rgba(124, 58, 237, .1) 0%, rgba(124, 58, 237, .02) 100%);--gradient-tile-green: linear-gradient(135deg, rgba(16, 185, 129, .1) 0%, rgba(16, 185, 129, .02) 100%);--ink-strong: #0f172a;--ink-soft: #334155;--ink-subtle: #64748b;--surface-bg: #f8fafc;--surface-card: #ffffff;--surface-card-alt: #f1f5f9;--surface-glass: rgba(255, 255, 255, .75);--success: #10b981;--success-bg: #ecfdf5;--error: #ef4444;--error-bg: #fef2f2;--info: #3b82f6;--info-bg: #eff6ff;--warning: #f59e0b;--warning-bg: #fefbeb;--line: rgba(29, 78, 216, .08);--line-strong: rgba(29, 78, 216, .16);--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .08), 0 2px 4px -2px rgb(0 0 0 / .08);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .08), 0 4px 6px -4px rgb(0 0 0 / .08);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .08), 0 8px 10px -6px rgb(0 0 0 / .08);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 24px;--sidebar-width: 240px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:Plus Jakarta Sans,Segoe UI,sans-serif;color:var(--ink-strong);background:var(--surface-bg);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}h1,h2,h3,h4{font-family:Sora,sans-serif;letter-spacing:-.02em}.app-root{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:50;background:var(--surface-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;transition:all .2s ease}.topbar-scrolled{box-shadow:var(--shadow-md);background:#fff}.topbar .brand{font-family:Sora,sans-serif;font-size:1.35rem;font-weight:800;color:var(--brand-primary);display:flex;align-items:center;gap:8px}.brand-logo-icon{font-size:1.5rem}.topnav{display:flex;align-items:center;gap:8px}.topnav a{padding:8px 16px;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;color:var(--ink-soft);transition:all .2s ease}.topnav a:hover{background:var(--brand-primary-light);color:var(--brand-primary)}.login-btn-header{background:var(--brand-primary);color:#fff!important}.login-btn-header:hover{background:var(--brand-primary-dark)!important;color:#fff!important}.logout-btn-header{border:1px solid var(--line-strong);background:#fff;color:var(--ink-soft);padding:6px 14px;font-size:.85rem;border-radius:30px;font-weight:600;cursor:pointer;transition:all .2s;font-family:inherit;margin-left:8px}.logout-btn-header:hover{background:var(--error-bg);color:var(--error);border-color:#ef444433}.hamburger-btn{display:none;background:transparent;border:none;color:var(--ink-strong);cursor:pointer}.mobile-topnav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:16px;gap:8px;box-shadow:var(--shadow-lg)}@media(max-width:768px){.topnav{display:none}.hamburger-btn{display:block}.mobile-topnav{display:flex}}.page-wrap{flex:1;width:min(1200px,100% - 32px);margin:0 auto;padding:32px 0}.footer{background:#fff;border-top:1px solid var(--line);padding:24px;margin-top:auto}.footer-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}.footer-brand{font-family:Sora,sans-serif;font-weight:800;color:var(--brand-primary);display:flex;align-items:center;gap:6px}.footer-copy{color:var(--ink-subtle);font-size:.85rem}.landing-wrap{display:grid;gap:64px;padding-bottom:48px}.hero{padding:80px 40px;text-align:center;background:radial-gradient(circle at top right,var(--brand-primary-light),transparent 60%);border-radius:var(--radius-xl);border:1px solid var(--line)}.hero .eyebrow{color:var(--brand-primary);font-size:.95rem;font-weight:700;text-transform:uppercase;letter-spacing:.15em;margin-bottom:16px}.hero h1{font-size:clamp(2rem,5vw,3.25rem);line-height:1.15;font-weight:800;max-width:850px;margin:0 auto 20px;color:var(--ink-strong)}.hero-copy{font-size:1.2rem;color:var(--ink-soft);max-width:680px;margin:0 auto 40px;line-height:1.6}.hero-cta-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;font-weight:600;font-size:.95rem;border-radius:var(--radius-sm);cursor:pointer;transition:all .2s ease;font-family:inherit;border:none}.btn-primary{background:var(--brand-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--brand-primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-outline{background:transparent;border:2px solid var(--line-strong);color:var(--brand-primary)}.btn-outline:hover{background:var(--brand-primary-light)}.features-section{display:grid;gap:32px}.section-header{text-align:center;max-width:650px;margin:0 auto}.status-chip{background:var(--brand-primary-light);color:var(--brand-primary);font-weight:700;padding:6px 16px;font-size:.8rem;letter-spacing:.05em;border-radius:var(--radius-sm);text-transform:uppercase}.section-header h2{font-size:2rem;color:var(--ink-strong);margin-top:16px;margin-bottom:12px;font-weight:800}.section-header .subtle{font-size:1.05rem;color:var(--ink-soft);line-height:1.6}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.feature-panel{display:flex;flex-direction:column;gap:16px;padding:32px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);border-radius:var(--radius-lg);transition:all .3s ease}.feature-panel:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:var(--brand-primary)}.feature-icon{font-size:1.8rem;width:56px;height:56px;background:var(--gradient-tile-blue);border:1px solid rgba(29,78,216,.15);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center}.feature-panel h3{font-size:1.2rem;color:var(--ink-strong);font-weight:700}.feature-description{margin:0;font-size:.95rem;color:var(--ink-soft);line-height:1.6}.cta-banner{background:var(--surface-card-alt);border:1px solid var(--line-strong);padding:48px 32px;text-align:center;display:grid;gap:20px;border-radius:var(--radius-xl)}.cta-banner h2{font-size:1.85rem;color:var(--ink-strong);font-weight:800}.cta-banner .subtle{max-width:580px;margin:0 auto;font-size:1rem;color:var(--ink-soft);line-height:1.6}.cta-actions{display:flex;gap:16px;justify-content:center}.portal-layout{display:grid;grid-template-columns:var(--sidebar-width) 1fr;gap:32px;align-items:start}.mobile-sidebar-selector{display:none;position:relative}@media(max-width:768px){.portal-layout{grid-template-columns:1fr;position:relative}.desktop-sidebar{display:none!important}.mobile-sidebar-selector{display:block;margin-bottom:8px}}.sidebar{position:sticky;top:96px;background:var(--surface-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:12px 0;box-shadow:var(--shadow-sm)}.sidebar-nav-item:hover{background:var(--brand-primary-light);color:var(--brand-primary)!important}.sidebar-nav-item:hover .icon-wrapper{color:var(--brand-primary)!important}.panel{background:var(--surface-card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.alert{padding:12px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600}.error-alert{background-color:var(--error-bg);border:1px solid rgba(239,68,68,.2);color:var(--error)}.success-alert{background-color:var(--success-bg);border:1px solid rgba(16,185,129,.2);color:var(--success)}.badge-row{display:flex;gap:8px}.badge{padding:4px 12px;border-radius:30px;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.qotd-badge{background-color:var(--brand-primary-light);color:var(--brand-primary);border:1px solid var(--line)}.difficulty-badge.easy{background-color:var(--success-bg);color:var(--success);border:1px solid rgba(16,185,129,.2)}.difficulty-badge.medium{background-color:var(--warning-bg);color:var(--warning);border:1px solid rgba(245,158,11,.2)}.difficulty-badge.hard{background-color:var(--error-bg);color:var(--error);border:1px solid rgba(239,68,68,.2)}.option-item:hover:not(:disabled){border-color:var(--brand-primary)!important;background-color:var(--brand-primary-light)!important;transform:translate(4px)}.option-item.selected{border-color:var(--brand-primary)!important;background-color:var(--brand-primary-light)!important;box-shadow:0 0 0 2px #1d4ed833}.option-item.selected .option-marker{background-color:var(--brand-primary)!important;color:#fff!important}.option-item.correct{border-color:var(--success)!important;background-color:var(--success-bg)!important}.option-item.correct .option-marker{background-color:var(--success)!important;color:#fff!important}.option-item.incorrect{border-color:var(--error)!important;background-color:var(--error-bg)!important}.option-item.incorrect .option-marker{background-color:var(--error)!important;color:#fff!important}.toast{position:fixed;bottom:24px;right:24px;z-index:2000;padding:14px 20px;border-radius:var(--radius-md);font-weight:700;font-size:.9rem;box-shadow:var(--shadow-lg);max-width:min(360px,calc(100vw - 48px));animation:toastIn .25s ease}@keyframes toastIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.toast-success{background:var(--success);color:#fff}.toast-error{background:var(--error);color:#fff}.toast-info{background:var(--brand-primary);color:#fff}.hero{position:relative;overflow:hidden}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);z-index:0}.hero:before{width:320px;height:320px;background:radial-gradient(circle,rgba(124,58,237,.16),transparent 70%);top:-120px;right:-80px}.hero:after{width:260px;height:260px;background:radial-gradient(circle,rgba(234,88,12,.14),transparent 70%);bottom:-100px;left:-60px}.hero>*{position:relative;z-index:1}.dual-audience{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px}.audience-panel{position:relative;overflow:hidden;border-radius:var(--radius-xl);padding:36px;color:#fff;display:grid;gap:16px;box-shadow:var(--shadow-lg)}.audience-panel.for-students{background:var(--gradient-hero)}.audience-panel.for-schools{background:var(--gradient-cta)}.audience-panel .audience-eyebrow{font-size:.8rem;font-weight:800;text-transform:uppercase;letter-spacing:.12em;opacity:.85}.audience-panel h3{font-size:1.5rem;font-weight:800}.audience-panel p{opacity:.92;line-height:1.6;font-size:.98rem}.audience-panel ul{display:grid;gap:10px;list-style:none;margin:4px 0 0;padding:0}.audience-panel li{display:flex;align-items:flex-start;gap:10px;font-size:.92rem;font-weight:600}.audience-panel .audience-link{margin-top:8px;display:inline-flex;align-items:center;gap:6px;font-weight:700;color:#fff;background:#ffffff2e;padding:10px 18px;border-radius:999px;width:fit-content;transition:all .2s ease}.audience-panel .audience-link:hover{background:#ffffff4d;transform:translateY(-1px)}.audience-blob{position:absolute;width:200px;height:200px;border-radius:50%;background:#ffffff1a;right:-60px;bottom:-60px}.stat-tile{padding:24px;border-radius:var(--radius-lg);display:flex;align-items:center;gap:20px;border:1px solid var(--line)}.stat-tile[data-tone=blue]{background:var(--gradient-tile-blue);border-color:#1d4ed833}.stat-tile[data-tone=orange]{background:var(--gradient-tile-orange);border-color:#ea580c33}.stat-tile[data-tone=purple]{background:var(--gradient-tile-purple);border-color:#7c3aed33}.stat-tile[data-tone=green]{background:var(--gradient-tile-green);border-color:#10b98133}.stat-tile-icon{width:48px;height:48px;min-width:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700}.stat-tile[data-tone=blue] .stat-tile-icon{background:#1d4ed824;color:var(--brand-primary)}.stat-tile[data-tone=orange] .stat-tile-icon{background:#ea580c24;color:var(--brand-accent)}.stat-tile[data-tone=purple] .stat-tile-icon{background:#7c3aed24;color:var(--brand-tertiary)}.stat-tile[data-tone=green] .stat-tile-icon{background:#10b98124;color:var(--success)}.stat-tile-label{font-size:.8rem;font-weight:700;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.05em}.stat-tile-value{font-size:1.9rem;font-weight:800;color:var(--ink-strong);margin-top:2px}.streak-pill{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--gradient-cta);color:#fff;font-weight:800;font-size:.95rem;box-shadow:var(--shadow-md)}.thread-card{display:block;padding:20px 24px;text-decoration:none;color:inherit;transition:all .2s ease}.thread-card:hover{border-color:var(--brand-tertiary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.reply-item{padding:16px 20px}.moderation-bar{padding:14px 20px;display:flex;gap:10px;flex-wrap:wrap;align-items:center;background:var(--brand-tertiary-light);border-color:#7c3aed33}.loader-container{display:flex;align-items:center;justify-content:center;min-height:400px}.spinner{width:40px;height:40px;border:3px solid var(--line-strong);border-top-color:var(--brand-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media print{.topbar,.footer,.no-print,.toast{display:none!important}.page-wrap{padding:0!important}.panel{box-shadow:none!important;border:none!important}}