@font-face{font-family:Space Grotesk;font-style:normal;font-weight:400 700;font-display:swap;src:url(/assets/SpaceGrotesk-latin-BhU9QXUp.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--bg-primary: #fafafa;--bg-secondary: #fff;--bg-card: #fff;--text-primary: #1a1a1a;--text-secondary: #737373;--accent: #1a1a1a;--accent-hover: #333;--correct: #16a34a;--wrong: #dc2626;--border: #e5e5e5;--surface: #f5f5f5;--radius: 8px;--radius-sm: 6px;--shadow: 0 1px 3px rgba(0, 0, 0, .06);--shadow-hover: 0 4px 12px rgba(0, 0, 0, .08);--transition: .2s ease;--font-heading: "Space Grotesk", sans-serif;--font-body: "Space Grotesk", sans-serif;--correct-bg: #f0fdf4;--wrong-bg: #fef2f2;--timeout: #d97706;--timeout-bg: #fffbeb;--header-bg: rgba(255, 255, 255, .9);--shadow-menu: 0 4px 16px rgba(0, 0, 0, .1);--accent-contrast: #fff}[data-theme=dark]{--bg-primary: 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button.active{background:var(--surface);font-weight:700}.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:999;overflow:hidden}.confetti-piece{position:absolute;width:10px;height:10px;top:-10px;animation:confettiFall linear forwards}@media(max-width:640px){.hero h1{font-size:1.85rem}.category-grid{gap:.6rem}.category-grid>*{width:calc((100% - .6rem)/2)}.category-card{padding:1.15rem .75rem}.answers-grid{grid-template-columns:1fr}.question-card{padding:1.25rem 1rem}.question-card h2{font-size:1.1rem}.header-logo{font-size:1.15rem}.header-nav{gap:.6rem;font-size:.85rem}.leaderboard-table{font-size:.85rem}.leaderboard-table th,.leaderboard-table td{padding:.6rem .5rem}}@media(max-width:400px){.category-grid>*{width:100%}}.header-user{display:inline-flex;align-items:center;color:var(--text-primary);text-decoration:none;font-weight:600;font-size:.85rem;padding:0 .75rem;height:2.15rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);transition:border-color var(--transition),background var(--transition)}.header-user:hover{border-color:var(--text-primary);background:var(--bg-card)}.header-sign-in{display:inline-flex;align-items:center;gap:.35rem;background:var(--surface);color:var(--text-secondary);border:1px solid var(--border);padding:0 .7rem;height:2.15rem;border-radius:var(--radius-sm);font-size:.82rem;font-weight:500;cursor:pointer;font-family:var(--font-body);transition:border-color var(--transition),background var(--transition),color var(--transition)}.header-sign-in:hover{border-color:var(--text-primary);background:var(--bg-card);color:var(--text-primary)}.header-sign-in svg{flex-shrink:0}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:overlayFadeIn .2s ease-out}.modal-overlay.closing{animation:overlayFadeOut .2s ease-in forwards}.modal-content{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;max-width:400px;width:90%;position:relative;box-shadow:var(--shadow-menu);animation:modalSlideIn .25s ease-out}.modal-overlay.closing .modal-content{animation:modalSlideOut .2s ease-in forwards}@keyframes overlayFadeIn{0%{opacity:0}to{opacity:1}}@keyframes overlayFadeOut{0%{opacity:1}to{opacity:0}}@keyframes modalSlideIn{0%{opacity:0;transform:scale(.95) translateY(10px)}to{opacity:1;transform:scale(1) translateY(0)}}@keyframes modalSlideOut{0%{opacity:1;transform:scale(1) translateY(0)}to{opacity:0;transform:scale(.95) translateY(10px)}}.sign-in-modal h2{margin-bottom:.5rem;font-family:var(--font-heading);font-size:1.4rem}.sign-in-modal>p{color:var(--text-secondary);margin-bottom:1rem;font-size:.9rem;line-height:1.5}.sign-in-perks{list-style:none;padding:0;margin:0 0 1.5rem;display:flex;flex-direction:column;gap:.4rem}.sign-in-perks li{font-size:.85rem;color:var(--text-secondary);padding-left:1.4rem;position:relative}.sign-in-perks li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.sign-in-buttons{display:flex;flex-direction:column;gap:.75rem}.sign-in-btn{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-primary);font-size:.95rem;font-weight:500;cursor:pointer;font-family:var(--font-body);display:flex;align-items:center;justify-content:center;gap:.6rem;transition:background var(--transition),border-color var(--transition)}.sign-in-btn:hover{border-color:var(--text-primary);background:var(--bg-card)}.sign-in-btn svg{flex-shrink:0}.sign-in-footer{margin-top:1rem;font-size:.7rem;color:var(--text-secondary);text-align:center;line-height:1.4;opacity:.7}.modal-close{position:absolute;top:.75rem;right:.75rem;background:none;border:none;color:var(--text-secondary);font-size:1.2rem;cursor:pointer;padding:.25rem;line-height:1;border-radius:var(--radius-sm);transition:color var(--transition),background var(--transition)}.modal-close:hover{color:var(--text-primary);background:var(--surface)}.profile-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:2rem}.profile-header h1{font-family:var(--font-heading)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:2rem}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;text-align:center}.stat-value{font-size:1.5rem;font-weight:700;font-family:var(--font-heading);color:var(--text-primary)}.stat-label{font-size:.8rem;color:var(--text-secondary);margin-top:.25rem}.quiz-history{margin-top:2rem}.quiz-history h2{font-family:var(--font-heading);margin-bottom:1rem}.achievement-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:.75rem;margin-bottom:2rem}.achievement-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1rem .5rem;text-align:center;transition:all var(--transition)}.achievement-card.earned{border-color:var(--correct)}.achievement-card.locked{opacity:.4}.achievement-icon{font-size:1.5rem;display:block;margin-bottom:.25rem}.achievement-name{font-size:.7rem;color:var(--text-secondary)}.achievement-toast{position:fixed;top:5rem;right:1rem;z-index:1001;display:flex;flex-direction:column;gap:.5rem}.achievement-toast-item{background:var(--bg-card);border:1px solid var(--correct);border-radius:var(--radius);padding:.75rem 1rem;display:flex;align-items:center;gap:.5rem;box-shadow:var(--shadow-menu);animation:slideIn .3s ease;font-size:.9rem}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@media(max-width:600px){.stats-grid{grid-template-columns:repeat(2,1fr)}.profile-header{flex-direction:column;gap:1rem}.achievement-grid{grid-template-columns:repeat(3,1fr)}}@media(display-mode:standalone){html,body{overscroll-behavior:none}.header{padding-top:env(safe-area-inset-top)}.footer{padding-bottom:env(safe-area-inset-bottom)}.pwa-back-button{display:flex}}.pwa-back-button{display:none;align-items:center;justify-content:center;background:none;border:none;color:var(--text-secondary);padding:.25rem;margin-right:.5rem;transition:color var(--transition)}.pwa-back-button:hover{color:var(--text-primary)}.ios-install-wrapper{position:relative;display:inline-flex}.ios-install-btn{display:inline-flex;align-items:center;justify-content:center;background:none;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);padding:.4rem;transition:color var(--transition),border-color var(--transition)}.ios-install-btn:hover{color:var(--text-primary);border-color:var(--text-secondary)}.ios-install-popover{position:absolute;bottom:calc(100% + 8px);right:0;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-menu);z-index:51;min-width:220px;padding:.75rem 1rem;font-size:.85rem;color:var(--text-primary);animation:fadeInUp .15s ease}.ios-install-popover p{margin:0;line-height:1.5}