@import url(https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap);:root{--bg-primary:#0a0b10;--bg-secondary:#12141c;--accent-glow:#6366f1;--accent-emerald:#10b981;--accent-amber:#f59e0b;--text-primary:#f8fafc;--text-secondary:#94a3b8;--glass-bg:rgba(18,20,28,.7);--glass-border:rgba(255,255,255,.08)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:'Outfit',sans-serif;line-height:1.6;overflow-x:hidden}header{background:var(--glass-bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--glass-border);position:sticky;top:0;z-index:100;padding:1rem 2rem}.nav-container{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto}.logo{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,var(--accent-glow),var(--accent-emerald));-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-decoration:none}.nav-links{display:flex;gap:1.5rem;list-style:none}.nav-links a{color:var(--text-secondary);text-decoration:none;font-weight:600;transition:color .3s ease}.nav-links a:hover,.nav-links a.active{color:var(--text-primary);text-shadow:0 0 10px rgba(99,102,241,.5)}.container{max-width:1200px;margin:3rem auto;padding:0 2rem}.hero{text-align:center;padding:6rem 2rem;background:radial-gradient(circle at 50% 50%,rgba(99,102,241,.15) 0%,transparent 60%);border-radius:24px;border:1px solid var(--glass-border);margin-bottom:4rem}.hero h1{font-size:3.5rem;font-weight:800;margin-bottom:1.5rem;line-height:1.2}.hero h1 span{background:linear-gradient(135deg,var(--accent-amber),var(--accent-emerald));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero p{font-size:1.25rem;color:var(--text-secondary);max-width:800px;margin:0 auto 2rem auto}.btn{display:inline-block;padding:.8rem 2rem;border-radius:50px;font-weight:600;text-decoration:none;transition:all .3s ease;cursor:pointer}.btn-primary{background:linear-gradient(135deg,var(--accent-glow),#4f46e5);color:#fff;box-shadow:0 4px 20px rgba(99,102,241,.4)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(99,102,241,.6)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.card{background:var(--bg-secondary);border:1px solid var(--glass-border);border-radius:16px;padding:2rem;transition:all .3s ease}.card:hover{transform:translateY(-4px);border-color:rgba(99,102,241,.3);box-shadow:0 8px 30px rgba(0,0,0,.4)}.badge{display:inline-block;padding:.25rem .75rem;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:1rem}.badge-beginner{background:rgba(16,185,129,.15);color:var(--accent-emerald)}.badge-intermediate{background:rgba(245,158,11,.15);color:var(--accent-amber)}.badge-advanced{background:rgba(99,102,241,.15);color:var(--accent-glow)}.interactive-box{background:var(--bg-secondary);border-radius:16px;padding:2rem;border:1px solid var(--glass-border);margin-top:2rem}.quiz-options{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.quiz-option{background:rgba(255,255,255,.03);border:1px solid var(--glass-border);padding:1rem;border-radius:8px;cursor:pointer;transition:all .2s ease;text-align:left;color:var(--text-primary);font-family:inherit;font-size:1rem}.quiz-option:hover{background:rgba(99,102,241,.1);border-color:var(--accent-glow)}.feedback{margin-top:1.5rem;font-weight:600;padding:1rem;border-radius:8px;display:none}.feedback.correct{background:rgba(16,185,129,.15);color:var(--accent-emerald);display:block}.feedback.incorrect{background:rgba(239,68,68,.15);color:#ef4444;display:block}footer{border-top:1px solid var(--glass-border);padding:3rem 2rem;text-align:center;color:var(--text-secondary);font-size:.9rem;margin-top:6rem}footer a{color:var(--text-primary);text-decoration:none}