:root{--bg-sky-top:#fef7e4;--bg-sky-bottom:#d4e8d4;--bg-glow-1:rgba(255,200,100,.3);--bg-glow-2:rgba(180,220,160,.25);--card-bg:rgba(255,252,245,.85);--card-border:rgba(180,160,120,.3);--card-shadow:rgba(100,80,50,.08);--text-primary:#3d3929;--text-secondary:#6b6350;--text-muted:#9a9280;--accent-gold:#e8a832;--accent-gold-light:#f4c76a;--accent-green:#5a9a5a;--accent-green-light:#7ab87a;--accent-terracotta:#c4785a;--accent-sage:#8aaa7a;--correct:#5a9a5a;--incorrect:#c4785a;--hover-lift:rgba(255,250,240,.95);--transition-smooth:.35s cubic-bezier(.4, 0, .2, 1);--float-duration:6s}*{box-sizing:border-box;margin:0;padding:0}body{background:linear-gradient(180deg, var(--bg-sky-top) 0%, var(--bg-sky-bottom) 100%);min-height:100vh;color:var(--text-primary);font-family:DM Sans,Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica 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.8rem;font-size:.8rem;font-weight:600;display:inline-flex}.question-text{color:var(--text-primary);margin-bottom:2rem;font-family:Fraunces,Georgia,serif;font-size:max(1.25rem,min(4vw,1.75rem));font-weight:600;line-height:1.4}.answers-grid{gap:.75rem;display:grid}.answer-btn{cursor:pointer;transition:all var(--transition-smooth);text-align:left;background:rgba(255,255,255,.6);border:2px solid transparent;border-radius:16px;align-items:center;gap:1rem;width:100%;padding:1rem 1.25rem;font-family:inherit;font-size:1rem;display:flex}.answer-btn:hover:not(:disabled){border-color:var(--accent-sage);background:rgba(255,255,255,.9);transform:translate(5px)}.answer-btn:focus-visible{outline:3px solid var(--accent-gold);outline-offset:2px}.answer-btn.correct{border-color:var(--correct);background:rgba(90,154,90,.2)}.answer-btn.incorrect{border-color:var(--incorrect);background:rgba(196,120,90,.2)}.answer-btn:disabled{cursor:not-allowed;opacity:.7}.timer-container{border-top:1px solid 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0;border:none;border-radius:50%;justify-content:center;align-items:center;display:flex}.close-btn:hover{color:var(--text-primary);background:rgba(0,0,0,.05)}.achievements-list{flex:1;padding:1rem;overflow-y:auto}.achievement-item{transition:all var(--transition-smooth);opacity:.4;-webkit-filter:grayscale();filter:grayscale();border-radius:12px;gap:1rem;margin-bottom:.5rem;padding:1rem;display:flex}.achievement-item.unlocked{opacity:1;-webkit-filter:none();filter:none();background:rgba(90,154,90,.08)}.achievement-icon{background:var(--card-bg);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;display:flex}.achievement-item.unlocked .achievement-icon{background:linear-gradient(135deg, var(--accent-gold-light) 0%, var(--accent-gold) 100%)}.achievement-icon svg{width:24px;height:24px;color:var(--text-muted)}.achievement-item.unlocked .achievement-icon svg{color:#fff}.achievement-info{flex:1}.achievement-name{margin-bottom:.25rem;font-weight:600}.achievement-desc{color:var(--text-secondary);font-size:.8rem}.overlay{opacity:0;visibility:hidden;z-index:90;transition:all var(--transition-smooth);background:rgba(0,0,0,.3);position:fixed;top:0;bottom:0;left:0;right:0}.overlay.active{opacity:1;visibility:visible}.toast-container{z-index:10000;flex-direction:column;gap:10px;display:flex;position:fixed;top:20px;left:50%;transform:translate(-50%)}.toast{background:var(--card-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--card-border);border-radius:8px;padding:12px 24px;animation:.3s ease-out toastIn;box-shadow:0 4px 20px rgba(0,0,0,.15)}.toast-success{border-color:var(--accent-green)}.toast-error{border-color:var(--accent-terracotta)}.toast-warning{border-color:var(--accent-gold)}.toast-info{border-color:var(--accent-sage)}@keyframes toastIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@media (max-width:640px){.top-bar{flex-direction:column;gap:1rem}.stats-bar{justify-content:center;width:100%}.stat-item{padding:.4rem .8rem;font-size:.875rem}.question-card{padding:1.5rem}.results-actions{flex-direction:column}.results-actions .btn{width:100%}.achievements-panel{width:100%;max-width:100%}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.login-content{text-align:center}.auth-form{background:var(--card-bg);border:1px solid var(--card-border);max-width:400px;box-shadow:var(--card-shadow);border-radius:1.5rem;margin:2rem auto;padding:2rem}.form-group{text-align:left;margin-bottom:1.5rem}.form-group label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.875rem;font-weight:500;display:block}.form-group input{border:2px solid 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var(--card-border);box-shadow:var(--card-shadow);transition:var(--transition-smooth);border-radius:1rem;padding:1.5rem}.quiz-card:hover{box-shadow:0 4px 12px var(--card-shadow);transform:translateY(-2px)}.quiz-card-title{color:var(--text-primary);margin-bottom:.5rem;font-family:Fraunces,Georgia,serif;font-size:1.25rem;font-weight:600}.quiz-card-info{color:var(--text-secondary);margin-bottom:.75rem;font-size:.875rem}.quiz-card-desc{color:var(--text-muted);margin-bottom:1rem;font-size:.875rem;line-height:1.5}.quiz-card-btn{width:100%}.quiz-empty{text-align:center;color:var(--text-muted);padding:2rem}