@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-color:#0b0f19;--bg-gradient:radial-gradient(circle at top right, #1a1f35, #0b0f19);--text-primary:#fff;--text-secondary:#94a3b8;--accent-color:#3b82f6;--accent-hover:#2563eb;--accent-glow:#3b82f666;--success:#10b981;--danger:#ef4444;--glass-bg:#ffffff08;--glass-border:#ffffff14;--glass-shadow:0 8px 32px 0 #0000005e;--card-radius:20px;--transition:all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0;font-family:Outfit,sans-serif}body{background:var(--bg-color);background-image:var(--bg-gradient);color:var(--text-primary);-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;display:flex;overflow-x:hidden}#root{flex-direction:column;width:100%;min-height:100vh;display:flex}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--card-radius);box-shadow:var(--glass-shadow)}.glass-button{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--text-primary);cursor:pointer;transition:var(--transition);background:linear-gradient(135deg,#ffffff1a,#fff0);border:1px solid #ffffff2e;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:1.1rem;font-weight:500;display:inline-flex;box-shadow:0 4px 15px #0003}.glass-button:hover{background:#ffffff1a;transform:translateY(-2px);box-shadow:0 8px 25px #0000004d}.primary-button{background:var(--accent-color);color:#fff;cursor:pointer;transition:var(--transition);box-shadow:0 4px 15px var(--accent-glow);border:none;border-radius:12px;padding:14px 28px;font-size:1.1rem;font-weight:600}.primary-button:hover{background:var(--accent-hover);box-shadow:0 8px 25px var(--accent-glow);transform:translateY(-2px)}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-glow{0%{box-shadow:0 0 0 0 var(--accent-glow)}70%{box-shadow:0 0 0 15px #0000}to{box-shadow:0 0 #0000}}.animate-fade-in{animation:.6s cubic-bezier(.4,0,.2,1) forwards fadeIn}.delay-1{animation-delay:.1s}.delay-2{animation-delay:.2s}.delay-3{animation-delay:.3s}.landing-container{justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex;position:relative;overflow:hidden}.landing-content{text-align:center;z-index:10;flex-direction:column;align-items:center;width:100%;max-width:1000px;display:flex}.badge{color:#60a5fa;letter-spacing:1px;text-transform:uppercase;opacity:0;background:#3b82f633;border:1px solid #3b82f64d;border-radius:20px;margin-bottom:2rem;padding:.5rem 1rem;font-size:.9rem;font-weight:600}.title{color:#fff;opacity:0;margin-bottom:1.5rem;font-size:clamp(3rem,6vw,5rem);font-weight:700;line-height:1.1}.highlight{background:linear-gradient(135deg,#3b82f6 0%,#8b5cf6 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.subtitle{color:var(--text-secondary);opacity:0;max-width:600px;margin:0 auto 4rem;font-size:clamp(1.1rem,2vw,1.25rem);line-height:1.6}.features{opacity:0;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem;width:100%;margin-bottom:4rem;display:grid}.feature-item{text-align:left;padding:2rem;transition:transform .3s,box-shadow .3s}.feature-item:hover{border-color:#ffffff26;transform:translateY(-5px);box-shadow:0 15px 40px #0006}.feature-icon{margin-bottom:1rem;font-size:2.5rem}.feature-item h3{color:#fff;margin-bottom:.5rem;font-size:1.25rem}.feature-item p{color:var(--text-secondary);font-size:.95rem;line-height:1.5}.start-button{border-radius:50px;align-items:center;gap:12px;padding:1.2rem 3rem;font-size:1.25rem;animation:2s infinite pulse-glow;display:inline-flex}.start-button svg{transition:transform .3s}.start-button:hover svg{transform:translate(5px)}.glow-orb{filter:blur(100px);z-index:1;opacity:.5;border-radius:50%;animation:10s ease-in-out infinite alternate float;position:absolute}.orb-1{background:#3b82f633;width:400px;height:400px;top:-100px;left:-100px}.orb-2{background:#8b5cf626;width:500px;height:500px;animation-delay:-5s;bottom:-150px;right:-150px}@keyframes float{0%{transform:translate(0)}to{transform:translate(30px,30px)}}@media (width<=768px){.landing-container{padding:1rem}.features{grid-template-columns:1fr}}.action-wrapper{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.history-panel{text-align:left;width:100%;max-width:520px;margin:32px auto 0;padding:20px 24px}.history-header{justify-content:space-between;align-items:baseline;margin-bottom:14px;display:flex}.history-header h3{color:var(--text-primary);font-size:1.05rem;font-weight:600}.history-best{color:var(--success);font-size:.85rem;font-weight:600}.history-empty{color:var(--text-secondary);margin-bottom:16px;font-size:.9rem}.history-list{flex-direction:column;gap:8px;margin:0 0 16px;padding:0;list-style:none;display:flex}.history-item{text-align:left;width:100%;color:var(--text-secondary);border:1px solid var(--glass-border);cursor:pointer;transition:var(--transition);background:#ffffff05;border-radius:10px;align-items:center;gap:12px;padding:10px 12px;font-size:.9rem;display:flex}.history-item:hover:not(:disabled){background:#ffffff0f;border-color:#ffffff2e;transform:translateY(-1px)}.history-item:disabled{cursor:default}.history-review-hint{color:var(--accent-color);flex-shrink:0;margin-left:8px;font-size:.8rem;font-weight:600}.history-dot{border-radius:50%;flex-shrink:0;width:9px;height:9px}.history-dot.pass{background:var(--success);box-shadow:0 0 8px var(--success)}.history-dot.fail{background:var(--danger);box-shadow:0 0 8px var(--danger)}.history-score{color:var(--text-primary);min-width:54px;font-weight:600}.history-pct{color:var(--accent-color);min-width:44px;font-weight:600}.history-date{opacity:.8;margin-left:auto;font-size:.8rem}.history-actions{flex-wrap:wrap;gap:10px;display:flex}.glass-button.small{border-radius:10px;padding:8px 16px;font-size:.9rem}.glass-button.small:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}.glass-button.small.danger{color:#fca5a5;border-color:#ef444466}.glass-button.small.danger:hover{background:#ef44441f}.history-msg{margin-top:12px;font-size:.85rem}.history-msg.success{color:var(--success)}.history-msg.error{color:var(--danger)}.quiz-container{flex-direction:column;align-items:center;min-height:100vh;padding:2rem;display:flex;position:relative;overflow:hidden}.quiz-header{z-index:10;width:100%;max-width:800px;margin-bottom:2rem;padding:1.5rem}.progress-bar-container{background:#ffffff1a;border-radius:4px;height:8px;margin-bottom:1rem;overflow:hidden}.progress-bar{background:var(--accent-color);height:100%;box-shadow:0 0 10px var(--accent-glow);transition:width .5s cubic-bezier(.4,0,.2,1)}.quiz-stats{color:var(--text-secondary);justify-content:space-between;font-weight:500;display:flex}.quiz-card{z-index:10;width:100%;max-width:800px;padding:3rem;transition:all .4s}.quiz-card.entering{opacity:0;transform:translate(40px)}.quiz-card.idle{opacity:1;transform:translate(0)}.quiz-card.exiting{opacity:0;transform:translate(-40px)}.question-text{margin-bottom:2.5rem;font-size:clamp(1.5rem,3vw,2rem);font-weight:600;line-height:1.4}.options-container{flex-direction:column;gap:1rem;margin-bottom:2.5rem;display:flex}.option-button{width:100%;color:var(--text-primary);text-align:left;cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:16px;align-items:center;padding:1rem 1.5rem;font-size:1.1rem;transition:all .2s;display:flex;position:relative;overflow:hidden}.option-button:hover:not(.disabled):not(.selected){background:#ffffff1a;border-color:#fff3;transform:translateY(-2px)}.option-marker{background:#ffffff1a;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;margin-right:1.5rem;font-weight:600;transition:all .2s;display:flex}.option-text{flex-grow:1}.option-button.selected{border-color:var(--accent-color);background:#3b82f626;box-shadow:0 0 15px #3b82f633}.option-button.selected .option-marker{background:var(--accent-color);color:#fff}.option-button.correct{border-color:var(--success);background:#10b98126}.option-button.correct .option-marker{background:var(--success);color:#fff}.option-button.incorrect{border-color:var(--danger);background:#ef444426}.option-button.incorrect .option-marker{background:var(--danger);color:#fff}.option-button.disabled{cursor:default;opacity:.6}.result-icon{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:24px;height:24px;font-size:.9rem;font-weight:700;display:flex}.correct-icon{background:var(--success);color:#fff}.incorrect-icon{background:var(--danger);color:#fff}.explanation{border-left:4px solid;margin-bottom:2rem;padding:1.5rem}.exp-correct{border-left-color:var(--success);background:linear-gradient(90deg,#10b9811a,#ffffff05)}.exp-incorrect{border-left-color:var(--danger);background:linear-gradient(90deg,#ef44441a,#ffffff05)}.explanation h3{margin-bottom:.5rem;font-size:1.2rem}.exp-correct h3{color:var(--success)}.exp-incorrect h3{color:var(--danger)}.explanation p{color:var(--text-secondary);line-height:1.5}.quiz-actions{justify-content:flex-end;display:flex}.check-button:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.next-button{align-items:center;gap:8px;display:flex}.orb-3{background:#3b82f61a;width:600px;height:600px;top:10%;left:20%}@media (width<=768px){.quiz-container{padding:1rem}.quiz-card{padding:1.5rem}.question-text{font-size:1.25rem}}.results-container{justify-content:center;align-items:center;min-height:100vh;padding:2rem;display:flex;position:relative;overflow:hidden}.results-card{text-align:center;z-index:10;flex-direction:column;align-items:center;width:100%;max-width:600px;padding:3rem;display:flex}.results-header{margin-bottom:3rem}.status-badge{letter-spacing:1.5px;border-radius:50px;margin-bottom:1rem;padding:.5rem 1.5rem;font-size:.9rem;font-weight:700;display:inline-block}.status-badge.passed{color:var(--success);background:#10b98133;border:1px solid #10b9814d}.status-badge.failed{color:var(--danger);background:#ef444433;border:1px solid #ef44444d}.results-title{font-size:2.5rem;font-weight:600}.score-circle-container{width:200px;height:200px;margin:0 auto 3rem;position:relative}.score-circle{width:100%;height:100%;transform:rotate(-90deg)}.score-circle-bg{fill:none;stroke:#ffffff1a;stroke-width:8px}.score-circle-progress{fill:none;stroke-width:8px;stroke-linecap:round;transition:stroke-dashoffset 1.5s cubic-bezier(.4,0,.2,1)}.score-text{flex-direction:column;align-items:center;display:flex;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.score-percentage{color:#fff;font-size:3rem;font-weight:700;line-height:1}.score-details{color:var(--text-secondary);margin-top:.5rem;font-size:1rem}.results-message{color:var(--text-secondary);max-width:400px;margin-bottom:3rem;font-size:1.1rem;line-height:1.6}.results-actions{justify-content:center;gap:1rem;display:flex}.orb-4{background:#10b98126;width:400px;height:400px;top:-100px;right:-100px}.orb-5{background:#3b82f626;width:500px;height:500px;bottom:-150px;left:-100px}.review-container{z-index:1;justify-content:center;width:100%;min-height:100vh;padding:32px 20px 64px;display:flex;position:relative}.review-inner{width:100%;max-width:760px}.review-topbar{z-index:5;justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;padding:14px 18px;display:flex;position:sticky;top:16px}.review-summary{flex-direction:column;align-items:flex-end;line-height:1.3;display:flex}.review-score{color:var(--text-primary);font-weight:700}.review-date{color:var(--text-secondary);font-size:.8rem}.review-title{color:var(--text-primary);margin-bottom:24px;font-size:1.8rem;font-weight:700}.review-empty{color:var(--text-secondary);padding:24px}.review-list{flex-direction:column;gap:18px;margin:0;padding:0;list-style:none;display:flex}.review-item{border-left:3px solid #0000;padding:20px 22px}.review-item.is-correct{border-left-color:var(--success)}.review-item.is-incorrect{border-left-color:var(--danger)}.review-item-head{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px;display:flex}.review-badge{border-radius:999px;padding:3px 10px;font-size:.78rem;font-weight:700}.review-badge.pass{color:var(--success);background:#10b98126}.review-badge.fail{color:#fca5a5;background:#ef444426}.review-cat{color:var(--text-secondary);border:1px solid var(--glass-border);border-radius:999px;padding:3px 10px;font-size:.75rem}.review-qnum{color:var(--text-secondary);margin-left:auto;font-size:.8rem;font-weight:600}.review-question{color:var(--text-primary);margin-bottom:16px;font-size:1.08rem;font-weight:600;line-height:1.45}.review-options{flex-direction:column;gap:8px;display:flex}.review-option{border:1px solid var(--glass-border);background:#ffffff05;border-radius:12px;align-items:center;gap:12px;padding:10px 14px;display:flex}.review-option.opt-correct{background:#10b9811a;border-color:#10b98166}.review-option.opt-your-wrong{background:#ef44441a;border-color:#ef444466}.review-marker{width:26px;height:26px;color:var(--text-secondary);background:#ffffff0f;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.opt-correct .review-marker{background:var(--success);color:#04241a}.opt-your-wrong .review-marker{background:var(--danger);color:#2a0606}.review-opt-text{color:var(--text-primary);flex:1;font-size:.95rem}.review-tags{flex-wrap:wrap;flex-shrink:0;gap:6px;display:flex}.tag{white-space:nowrap;border-radius:6px;padding:2px 8px;font-size:.68rem;font-weight:700}.tag-your{color:var(--text-secondary);background:#94a3b833}.tag-correct{color:var(--success);background:#10b98133}.review-explanation{border-top:1px solid var(--glass-border);color:var(--text-secondary);margin-top:14px;padding-top:14px;font-size:.9rem;line-height:1.5}.review-footer{justify-content:center;margin-top:28px;display:flex}@media (width<=600px){.review-tags{width:100%;margin-top:4px}.review-option{flex-wrap:wrap}}