@import"https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=Orbitron:wght@500;700&display=swap";:root{--bg: #0A0E27;--surface: #141B3D;--primary: #7C9CDB;--primary-dark: #5E80C0;--accent: #FBBF24;--text: #F0F4FF;--text-muted: #A5B4D4;--border: #1E2848;--success: #10B981;--warning: #FBBF24;--danger: #F87171;--radius: 12px;--shadow: 0 12px 36px rgba(0,0,0,.4), 0 0 28px #7C9CDB26;--popup-shadow: 0 0 60px #7C9CDB44;--control-bg: rgba(20, 27, 61, .7);--control-border: #1E2848}*{margin:0;padding:0;box-sizing:border-box}body{background:radial-gradient(ellipse at center,#141b3d,#0a0e27),radial-gradient(circle at 15% 25%,#7C9CDB11 1px,transparent 1px),radial-gradient(circle at 65% 85%,#FBBF2415 1px,transparent 1px),var(--bg);color:var(--text);font-family:Space Grotesk,Inter,-apple-system,sans-serif;min-height:100vh;overflow-x:hidden;display:flex;justify-content:center;align-items:center}.app-container{position:relative;width:100%;min-height:100vh;overflow:hidden}.particle-canvas{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}.star-bg-img{position:fixed;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.15;pointer-events:none;z-index:-1}.loading-indicator{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#0a0e27cc;z-index:100;font-size:1.2rem;color:var(--text-muted)}.title-section{margin-bottom:3rem}.title{font-family:Orbitron,sans-serif;font-size:3.5rem;font-weight:700;background:linear-gradient(135deg,#7c9cdb,#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-shadow:0 0 40px #7C9CDB66;margin-bottom:.5rem}.subtitle{font-size:1.2rem;color:var(--text-muted);letter-spacing:.05em}.start-buttons{display:flex;gap:1.5rem;margin-bottom:2rem}.btn-primary,.btn-secondary,.btn-back{display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 2rem;border:none;border-radius:var(--radius);font-family:Space Grotesk,sans-serif;font-size:1.1rem;font-weight:500;cursor:pointer;transition:all .3s ease;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:var(--bg);box-shadow:0 0 24px var(--primary)}.btn-primary:hover{box-shadow:0 0 40px var(--primary);transform:scale(1.05)}.btn-secondary{background:transparent;border:1px solid var(--primary);color:var(--primary);box-shadow:0 0 12px #7c9cdb33}.btn-secondary:hover{background:var(--surface);box-shadow:0 0 24px #7c9cdb44}.btn-back{background:var(--surface);color:var(--text);border:1px solid var(--border);margin-top:2rem}.high-score{font-size:1rem;color:var(--accent);text-shadow:0 0 12px #FBBF2455;margin-top:1rem}.start-page,.explore-page,.quiz-page{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:2rem;text-align:center}.page-title{font-family:Orbitron,sans-serif;font-size:2.5rem;margin-bottom:2rem;text-align:center;text-shadow:0 0 20px var(--primary)}.planet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;max-width:1100px;width:100%}@media (max-width: 900px){.planet-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 500px){.planet-grid{grid-template-columns:1fr}}.planet-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:var(--shadow);transition:all .3s ease;text-align:center;display:flex;flex-direction:column;align-items:center}.planet-card:hover{border-color:var(--primary);box-shadow:0 12px 36px #00000080,0 0 28px #7c9cdb44;transform:translateY(-4px)}.planet-icon{width:60px;height:60px;margin-bottom:.5rem;filter:drop-shadow(0 0 12px rgba(124,156,219,.6))}.planet-icon svg{width:100%;height:100%}.planet-name{font-size:1.3rem;font-weight:700;margin-bottom:.5rem;color:var(--accent)}.planet-info p{display:flex;align-items:center;gap:.4rem;font-size:.85rem;color:var(--text-muted);margin:.3rem 0}.quiz-progress{text-align:center;font-size:1.2rem;color:var(--text-muted);margin-bottom:2rem}.quiz-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:var(--shadow);max-width:600px;width:100%}.quiz-question{font-size:1.3rem;margin-bottom:1.5rem;line-height:1.6}.quiz-options{display:flex;flex-direction:column;gap:1rem}.quiz-option{background:#7c9cdb1a;border:1px solid var(--border);border-radius:var(--radius);padding:.8rem 1.5rem;font-size:1.1rem;color:var(--text);cursor:pointer;transition:all .2s ease;text-align:left}.quiz-option:hover{background:#7c9cdb33;border-color:var(--primary)}.quiz-score{text-align:center;margin-top:2rem;font-size:1.3rem;color:var(--accent)}.quiz-result{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center}.quiz-result h2{font-family:Orbitron,sans-serif;font-size:2.5rem;margin-bottom:1.5rem;text-shadow:0 0 30px var(--primary)}.final-score{font-size:2rem;color:var(--accent);margin-bottom:1rem}.popup-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;padding:1rem}.popup-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2rem;max-width:450px;width:100%;box-shadow:var(--popup-shadow);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.popup-card h3{font-family:Orbitron,sans-serif;font-size:1.8rem;color:var(--accent);margin-bottom:1rem}.popup-card p{margin:.5rem 0;font-size:1rem;line-height:1.5}.planet-desc{border-top:1px solid var(--border);padding-top:.8rem;margin-top:.8rem;color:var(--text-muted)}.popup-card .btn-primary{margin-top:1.5rem;width:100%;justify-content:center}.particle-control-ui{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background:var(--control-bg);border:1px solid var(--control-border);border-radius:20px;padding:10px 20px;display:flex;align-items:center;gap:15px;z-index:10;box-shadow:0 4px 20px #0000004d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.particle-control-ui .slider-track{width:150px;height:6px;background:#a5b4d44d;border-radius:3px;position:relative;cursor:grab}.particle-control-ui .slider-thumb{width:16px;height:16px;background:var(--primary);border-radius:50%;position:absolute;top:50%;transform:translate(-50%,-50%);border:2px solid var(--text);cursor:grab}.particle-control-ui .spread-label{font-size:.9rem;color:var(--text-muted)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px}