@import "https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-gradient:linear-gradient(135deg, #1a1b26 0%, #0d0d14 100%);--glass-bg:#ffffff08;--glass-border:#ffffff14;--accent-primary:#8a2be2;--accent-secondary:#ff007f;--text-primary:#f0f0f0;--text-secondary:#a0a0a0;--success:#00d2ff;--error:#ff4b4b;--shadow:0 8px 32px 0 #0000005e;--blur:blur(16px)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-gradient);color:var(--text-primary);justify-content:center;align-items:center;min-height:100vh;font-family:Outfit,sans-serif;display:flex;overflow-x:hidden}.blob-container{z-index:-1;width:100vw;height:100vh;position:fixed;top:0;left:0;overflow:hidden}.blob{filter:blur(80px);opacity:.5;border-radius:50%;animation:20s ease-in-out infinite alternate float;position:absolute}.blob-1{background:var(--accent-primary);width:400px;height:400px;top:-10%;left:-10%}.blob-2{background:var(--accent-secondary);width:300px;height:300px;animation-delay:-5s;bottom:-10%;right:-5%}@keyframes float{0%{transform:translate(0)scale(1)}to{transform:translate(50px,50px)scale(1.1)}}.app-container{width:100%;max-width:800px;margin:0 auto;padding:2rem}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:var(--blur);border:1px solid var(--glass-border);box-shadow:var(--shadow);border-radius:24px;padding:2.5rem;position:relative;overflow:hidden}.header{border-bottom:1px solid var(--glass-border);justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;display:flex}.title{background:linear-gradient(to right, var(--accent-primary), var(--accent-secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:1.5rem;font-weight:700}.stats{color:var(--text-secondary);gap:1.5rem;font-size:1rem;font-weight:500;display:flex}.stats span{color:var(--text-primary);font-weight:600}.question-text{margin-bottom:2rem;font-size:1.5rem;font-weight:500;line-height:1.4}.options-grid{flex-direction:column;gap:1rem;margin-bottom:2rem;display:flex}.option-btn{border:1px solid var(--glass-border);color:var(--text-primary);text-align:left;cursor:pointer;background:#ffffff0d;border-radius:16px;align-items:center;gap:1rem;padding:1.2rem 1.5rem;font-family:inherit;font-size:1.1rem;transition:all .3s cubic-bezier(.25,.8,.25,1);display:flex}.option-letter{background:#ffffff1a;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:.9rem;font-weight:600;display:flex}.option-btn:hover:not(:disabled){background:#ffffff1a;border-color:#fff3;transform:translateY(-2px)}.option-btn.selected{border-color:var(--text-primary);background:#ffffff26}.option-btn.correct{border-color:var(--success);color:var(--success);background:#00d2ff26}.option-btn.correct .option-letter{background:var(--success);color:#000}.option-btn.incorrect{border-color:var(--error);color:var(--error);background:#ff4b4b26}.option-btn.incorrect .option-letter{background:var(--error);color:#fff}.option-btn:disabled{cursor:default}.explanation{border-left:4px solid var(--accent-primary);background:#ffffff0d;border-radius:0 12px 12px 0;margin-bottom:2rem;padding:1.5rem;animation:.4s cubic-bezier(.25,.8,.25,1) slideIn}.explanation-title{color:var(--accent-primary);margin-bottom:.5rem;font-weight:600}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.controls{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;display:flex}.btn{background:var(--accent-primary);color:#fff;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:.5rem;padding:.8rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:600;transition:all .3s;display:inline-flex}.btn:hover{background:#9b42ea;transform:translateY(-2px);box-shadow:0 4px 15px #8a2be266}.btn-secondary{background:#ffffff1a}.btn-secondary:hover{box-shadow:none;background:#ffffff26}.jump-container{align-items:center;gap:.5rem;display:flex}.jump-input{border:1px solid var(--glass-border);color:var(--text-primary);text-align:center;background:#ffffff0d;border-radius:12px;outline:none;width:80px;padding:.8rem;font-family:inherit;font-size:1rem;transition:border-color .3s}.jump-input:focus{border-color:var(--accent-primary)}.progress-bar-container{background:#ffffff1a;border-radius:3px;width:100%;height:6px;margin-bottom:2rem;overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));height:100%;transition:width .5s cubic-bezier(.25,.8,.25,1)}.completion-screen{text-align:center}.completion-score{background:linear-gradient(to right, var(--success), var(--accent-secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin:1rem 0;font-size:4rem;font-weight:700}