:root{--bg:#0a0a0f;--bg-card:rgba(18,18,30,0.85);--bg-surface:#12121e;--text:#e8e8f0;--text-muted:#888;--accent:#f59e0b;--accent2:#d97706;--accent-glow:rgba(99,102,241,0.3);--gradient:linear-gradient(135deg,#f59e0b,#ec4899,#8b5cf6);--border:rgba(255,255,255,0.08);--radius:12px;--font:'Inter',sans-serif;--mono:'JetBrains Mono',monospace}
[data-theme="light"]{--bg:#f5f5fa;--bg-card:rgba(255,255,255,0.9);--bg-surface:#fff;--text:#1a1a2e;--text-muted:#666;--border:rgba(0,0,0,0.08);--accent-glow:rgba(99,102,241,0.15)}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh}
.container{max-width:1100px;margin:0 auto;padding:0 1.5rem}
.navbar{position:sticky;top:0;z-index:100;background:rgba(10,10,15,0.8);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:0.75rem 0}
[data-theme="light"] .navbar{background:rgba(245,245,250,0.85)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{text-decoration:none;color:var(--text);font-weight:700;font-size:1.25rem;display:flex;align-items:center;gap:0.5rem}
.brand span{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;gap:0.5rem;align-items:center}
.nav-links a{text-decoration:none;color:var(--text-muted);font-size:0.9rem;padding:0.4rem 0.75rem;border-radius:8px;transition:all 0.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--accent-glow)}
.kofi-link{color:#ff5e5b !important;font-weight:600}
.theme-btn{background:none;border:1px solid var(--border);width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:1.1rem;display:flex;align-items:center;justify-content:center;transition:all 0.2s}
.theme-btn:hover{border-color:var(--accent);transform:scale(1.1)}
.hero{text-align:center;padding:2rem 0 1.5rem}
.hero h1{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:800;margin-bottom:0.5rem}
.gradient-text{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{color:var(--text-muted);font-size:1rem;max-width:500px;margin:0 auto}
.glass-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.5rem;backdrop-filter:blur(10px)}
.glass-card:hover{border-color:rgba(99,102,241,0.2)}
.mt-2{margin-top:0.5rem}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}
.text-muted{color:var(--text-muted)}
.btn{padding:0.6rem 1.2rem;border:none;border-radius:8px;cursor:pointer;font-family:var(--font);font-weight:600;font-size:0.85rem;transition:all 0.2s}
.btn-primary{background:var(--gradient);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 20px var(--accent-glow)}
.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:0.4rem 0.8rem;font-size:0.8rem}
.btn-group{display:flex;gap:2px}
.btn-group button{background:var(--bg-card);color:var(--text-muted);border:1px solid var(--border);padding:0.4rem 0.8rem;font-size:0.8rem;cursor:pointer;transition:all 0.2s;font-family:var(--font)}
.btn-group button:first-child{border-radius:8px 0 0 8px}
.btn-group button:last-child{border-radius:0 8px 8px 0}
.btn-group button.active,.btn-group button:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
input[type="text"],input[type="number"],textarea,select{width:100%;padding:0.6rem 0.9rem;background:var(--bg-surface);color:var(--text);border:1px solid var(--border);border-radius:8px;outline:none;font-family:var(--font);font-size:0.9rem}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.info-section{margin:2rem 0}.info-section h2{text-align:center;margin-bottom:1.5rem}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}
.info-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem;transition:all 0.3s}
.info-card:hover{border-color:var(--accent);transform:translateY(-3px)}
.info-card h3{font-size:1rem;margin-bottom:0.5rem}.info-card p{font-size:0.85rem;color:var(--text-muted);line-height:1.6}
.footer{margin-top:3rem;border-top:1px solid var(--border);padding:2rem 0}
.footer-inner{display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between}
.footer-brand span{font-weight:700;font-size:1.1rem}.footer-brand p{color:var(--text-muted);font-size:0.85rem;margin-top:0.3rem}
.footer-brand a{color:var(--accent);text-decoration:none}
.copyright{width:100%;text-align:center;color:var(--text-muted);font-size:0.8rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border)}
@media(max-width:768px){.nav-links{display:none}}


.quiz-container{max-width:700px;margin:0 auto}
.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:0.75rem;margin-bottom:1.5rem}
.category-btn{padding:1rem;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:center;transition:all 0.2s;font-size:0.85rem;font-weight:600}
.category-btn:hover,.category-btn.active{border-color:var(--accent);background:var(--accent-glow);transform:translateY(-2px)}
.category-btn .emoji{font-size:1.5rem;display:block;margin-bottom:0.3rem}
.question-card{text-align:center;padding:2rem}
.question-number{font-size:0.8rem;color:var(--text-muted);margin-bottom:0.5rem}
.question-text{font-size:1.2rem;font-weight:600;margin-bottom:1.5rem;line-height:1.5}
.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem;max-width:500px;margin:0 auto}
.option-btn{padding:0.8rem 1rem;background:var(--bg-surface);border:2px solid var(--border);border-radius:10px;cursor:pointer;font-size:0.9rem;transition:all 0.2s;text-align:left}
.option-btn:hover{border-color:var(--accent);transform:scale(1.02)}
.option-btn.correct{border-color:#10b981;background:rgba(16,185,129,0.15);color:#10b981}
.option-btn.wrong{border-color:#ef4444;background:rgba(239,68,68,0.15);color:#ef4444}
.option-btn.disabled{pointer-events:none;opacity:0.6}
.progress-bar{height:6px;background:var(--border);border-radius:3px;margin:1rem 0;overflow:hidden}
.progress-fill{height:100%;background:var(--gradient);border-radius:3px;transition:width 0.3s}
.score-display{display:flex;justify-content:center;gap:2rem;margin-bottom:1rem}
.score-item{text-align:center}.score-item .num{font-size:1.5rem;font-weight:800;font-family:var(--mono)}
.score-item .lbl{font-size:0.7rem;color:var(--text-muted);text-transform:uppercase}
.result-card{text-align:center;padding:2rem}
.result-card .big-score{font-size:4rem;font-weight:900;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.streak-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:0.75rem;font-weight:600;background:rgba(245,158,11,0.2);color:#f59e0b;margin-top:0.5rem}