@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg-color:#f9fafb;--surface-color:#fff;--text-primary:#111827;--text-secondary:#4b5563;--accent-color:#2563eb;--accent-hover:#1d4ed8;--border-color:#e5e7eb;--success-color:#10b981;--font-family:"Inter", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-primary);line-height:1.6}a{color:inherit;text-decoration:none}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:40px 20px}.navbar{background-color:var(--surface-color);border-bottom:1px solid var(--border-color);justify-content:center;padding:16px 20px;display:flex}.nav-content{justify-content:space-between;align-items:center;width:100%;max-width:1200px;display:flex}.logo{color:var(--text-primary);align-items:center;gap:8px;font-size:1.25rem;font-weight:700;display:flex}.logo-icon{color:var(--accent-color)}.nav-links{align-items:center;gap:24px;display:flex}.nav-link{color:var(--text-secondary);font-size:.95rem;font-weight:500;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--accent-color)}.mobile-menu-btn{cursor:pointer;color:var(--text-primary);background:0 0;border:none;display:none}@media (width<=768px){.nav-links{display:none}.mobile-menu-btn{display:block}}.footer{background-color:var(--surface-color);border-top:1px solid var(--border-color);text-align:center;color:var(--text-secondary);padding:24px 20px;font-size:.875rem}h1{letter-spacing:-.02em;margin-bottom:16px;font-size:2.5rem;font-weight:700}h2{margin-bottom:12px;font-size:1.75rem;font-weight:600}h3{margin-bottom:8px;font-size:1.25rem;font-weight:600}p{color:var(--text-secondary);margin-bottom:16px}.btn{cursor:pointer;border:none;border-radius:6px;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:.95rem;font-weight:500;transition:background-color .2s,color .2s;display:inline-flex}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover{background-color:var(--accent-hover)}.btn-secondary{color:var(--text-primary);background-color:#f3f4f6}.btn-secondary:hover{background-color:#e5e7eb}.btn-outline{border:1px solid var(--border-color);color:var(--text-primary);background-color:#0000}.btn-outline:hover{background-color:#f9fafb}.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;display:grid}.card{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;flex-direction:column;padding:24px;transition:transform .2s,box-shadow .2s;display:flex}.card:hover{transform:translateY(-2px);box-shadow:0 4px 6px -1px #0000000d}.card-title{color:var(--text-primary);margin-bottom:12px;font-size:1.25rem;font-weight:600}.card-content{flex:1}.card-actions{justify-content:flex-start;margin-top:20px;display:flex}.text-center{text-align:center}.mb-2{margin-bottom:8px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}.mb-8{margin-bottom:32px}.mt-4{margin-top:16px}.mt-8{margin-top:32px}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:32px;display:grid}.stat-card{background-color:var(--surface-color);border:1px solid var(--border-color);text-align:center;border-radius:8px;padding:20px}.stat-value{color:var(--accent-color);margin-bottom:4px;font-size:2rem;font-weight:700}.stat-label{color:var(--text-secondary);font-size:.875rem;font-weight:500}.badge-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:16px;display:grid}.badge{text-align:center;color:var(--accent-color);background-color:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;padding:16px;font-weight:500}.quiz-container{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;max-width:600px;margin:0 auto;padding:32px}.progress-bar-container{background-color:var(--bg-color);border-radius:4px;height:8px;margin-bottom:32px;overflow:hidden}.progress-bar{background-color:var(--accent-color);height:100%;transition:width .3s}.option-btn{text-align:left;background-color:var(--surface-color);border:1px solid var(--border-color);cursor:pointer;width:100%;color:var(--text-primary);border-radius:6px;margin-bottom:12px;padding:16px;font-size:1rem;transition:all .2s;display:block}.option-btn:hover:not(:disabled),.option-btn.selected{border-color:var(--accent-color);background-color:#eff6ff}.option-btn.correct{border-color:var(--success-color);background-color:#ecfdf5}.option-btn.wrong{background-color:#fef2f2;border-color:#ef4444}.option-btn:disabled{cursor:not-allowed}.certificate{border:1px solid var(--border-color);text-align:center;background-color:var(--surface-color);background-image:radial-gradient(circle,#fff 0%,#f8fafc 100%);max-width:850px;margin:0 auto;padding:40px;position:relative;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.certificate-inner{border:4px double var(--border-color);padding:48px;position:relative}.certificate-inner:before{content:"";opacity:.05;z-index:0;pointer-events:none;background-image:url(/logo.jpg);background-position:50%;background-repeat:no-repeat;background-size:contain;border-radius:50%;width:420px;height:420px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.certificate-content{z-index:1;position:relative}.certificate-level{text-transform:uppercase;letter-spacing:.05em;border-radius:9999px;margin-bottom:16px;padding:8px 24px;font-size:1.125rem;font-weight:700;display:inline-block}.level-novice{color:#4b5563;background-color:#f3f4f6;border:1px solid #d1d5db}.level-scholar{color:#1e40af;background-color:#dbeafe;border:1px solid #bfdbfe}.level-expert{color:#92400e;background-color:#fef3c7;border:1px solid #fde68a}.level-master{color:#5b21b6;background-color:#ede9fe;border:1px solid #ddd6fe}.certificate-title{color:var(--text-primary);text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px;font-size:2.75rem;font-weight:800}.certificate-subtitle{color:var(--text-secondary);font-size:1.25rem;font-style:italic}.certificate-name{color:var(--accent-color);margin:16px 0 0;font-family:Georgia,serif;font-size:3rem;font-weight:700}.certificate-date{color:var(--text-secondary);margin-top:48px;font-style:italic;font-weight:500}.hero-section{text-align:center;background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;margin-bottom:40px;padding:60px 0}.hero-title{margin-bottom:24px;font-size:3rem}.hero-subtitle{max-width:600px;margin:0 auto 32px;font-size:1.25rem}.external-link{align-items:center;gap:4px;display:inline-flex}.lesson-content-body h3{color:var(--text-primary);margin-top:28px;margin-bottom:14px;font-size:1.4rem;font-weight:600}.lesson-content-body p{color:var(--text-secondary);margin-bottom:18px;font-size:1.05rem;line-height:1.8}.lesson-content-body ul{margin-bottom:24px;padding-left:20px}.lesson-content-body li{color:var(--text-secondary);margin-bottom:10px;font-size:1.05rem;line-height:1.7}.lesson-content-body strong{color:var(--text-primary);font-weight:600}.table-row-hover:hover{background-color:#f9fafb}@keyframes unlockedScaleUp{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.unlock-celebration{animation:1.5s ease-in-out infinite alternate unlockCelebratePulse}@keyframes unlockCelebratePulse{0%{box-shadow:0 0 10px #10b9811a}to{box-shadow:0 0 25px #10b9814d}}