:root{--bg-color:#0d1117;--text-color:#c9d1d9;--accent-color:#238636;--accent-hover:#2ea043;--secondary-bg:#161b22;--border-color:#30363d;--error-color:#f85149;--success-color:#238636;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}.app-container{flex-direction:column;max-width:900px;min-height:100vh;margin:0 auto;padding:2rem;display:flex}h1,h2,h3,h4{color:#fff;margin-bottom:1rem}p{color:#8b949e;margin-bottom:1rem}.btn{background-color:var(--accent-color);color:#fff;cursor:pointer;text-align:center;border:1px solid #f0f6fc1a;border-radius:6px;padding:.5rem 1rem;font-size:1rem;font-weight:500;text-decoration:none;transition:background-color .2s,transform .1s;display:inline-block}.btn:hover{background-color:var(--accent-hover)}.btn:active{transform:scale(.98)}.btn-secondary{background-color:var(--secondary-bg);border:1px solid var(--border-color);color:var(--text-color)}.btn-secondary:hover{background-color:#30363d;border-color:#8b949e}.card{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-radius:6px;margin-bottom:1rem;padding:1.5rem;transition:border-color .2s,box-shadow .2s}.card:hover{border-color:#8b949e;box-shadow:0 4px 12px #00000026}.grid{grid-template-columns:repeat(3,1fr);gap:1.5rem;margin-top:2rem;display:grid}@media (width<=900px){.grid{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.grid,.grid-2x2{grid-template-columns:1fr}}.grid-2x2{grid-template-columns:repeat(2,1fr);gap:1.5rem;display:grid}.horizontal-grid{scrollbar-width:thin;grid-template-rows:repeat(2,auto);grid-auto-columns:350px;grid-auto-flow:column;gap:1.5rem;padding-bottom:1rem;display:grid;overflow-x:auto}.horizontal-grid::-webkit-scrollbar{height:8px}.horizontal-grid::-webkit-scrollbar-track{background:var(--secondary-bg);border-radius:4px}.horizontal-grid::-webkit-scrollbar-thumb{background-color:var(--border-color);border-radius:4px}.horizontal-grid::-webkit-scrollbar-thumb:hover{border-bottom:2px solid var(--accent-color)}.header-wrapper{z-index:90;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background-color:#0d1117f2;border-bottom:none;margin:-2rem -2rem 2rem;padding-top:2rem;padding-left:2rem;padding-right:2rem;position:sticky;top:0;box-shadow:0 10px 30px -10px #00000080}.header-top{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding-bottom:1rem;display:flex}.secondary-nav{scrollbar-width:none;justify-content:center;align-items:center;gap:2.5rem;padding-top:1rem;padding-bottom:1rem;display:flex;overflow-x:auto}.secondary-nav::-webkit-scrollbar{display:none}.secondary-nav-item{color:#8b949e;white-space:nowrap;border-radius:4px;padding:.25rem .5rem;font-size:.9rem;font-weight:500;text-decoration:none;transition:all .2s}.secondary-nav-item:hover{color:var(--text-color);background-color:#ffffff0d}.logo{color:#fff;align-items:center;gap:.5rem;font-size:1.5rem;font-weight:700;display:flex}.logo span{color:var(--accent-color)}.code-editor-container{border:1px solid var(--border-color);background-color:#010409;border-radius:6px;margin-top:1rem;overflow:hidden}.code-header{background-color:var(--secondary-bg);border-bottom:1px solid var(--border-color);color:#8b949e;padding:.5rem 1rem;font-family:monospace;font-size:.9rem}.code-textarea{color:#e6edf3;resize:vertical;background-color:#0000;border:none;outline:none;width:100%;min-height:300px;padding:1rem;font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,Consolas,Liberation Mono,monospace;font-size:14px}.code-textarea:focus{box-shadow:inset 0 0 0 1px var(--accent-color)}.problem-statement{border-left:4px solid var(--accent-color);background-color:#2386361a;border-radius:0 6px 6px 0;margin-bottom:1.5rem;padding:1rem}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.4s ease-out forwards fadeIn}.recording-indicator{color:var(--error-color);align-items:center;gap:.5rem;margin-top:1rem;font-weight:500;display:inline-flex}.pulsing-dot{background-color:var(--error-color);border-radius:50%;width:10px;height:10px;animation:1.5s infinite pulse}@keyframes pulse{0%{transform:scale(.95);box-shadow:0 0 #f85149b3}70%{transform:scale(1);box-shadow:0 0 0 10px #f8514900}to{transform:scale(.95);box-shadow:0 0 #f8514900}}.score-display{color:var(--success-color);text-align:center;margin:2rem 0;font-size:4rem;font-weight:700}.company-card{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-left:4px solid var(--company-color);border-radius:6px;flex-direction:column;margin-bottom:1rem;padding:1.5rem;transition:border-color .2s,box-shadow .2s;display:flex;position:relative}.company-card:hover{border-color:#8b949e;border-left-color:var(--company-color);box-shadow:0 4px 12px #00000026}.company-header{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.company-logo-circle{background:var(--bg-color);border:1px solid var(--border-color);width:40px;height:40px;color:var(--company-color);border-radius:6px;justify-content:center;align-items:center;font-size:1.25rem;font-weight:700;display:flex}.company-card h3{color:#fff;margin:0;font-size:1.25rem}.company-card p{color:#8b949e;flex-grow:1;margin-bottom:1.5rem;font-size:.9rem}.mega-menu{z-index:50;justify-content:center;gap:2rem;padding:0;display:flex;position:relative}.mega-menu-item{cursor:pointer;color:var(--text-color);align-items:center;gap:.25rem;padding:.5rem 1rem;font-weight:600;transition:color .2s;display:flex;position:relative}.mega-menu-item:hover{color:var(--accent-color)}.mega-dropdown{background-color:var(--bg-color);border:1px solid var(--border-color);opacity:0;visibility:hidden;z-index:100;border-radius:8px;flex-direction:column;gap:.5rem;min-width:250px;margin-top:10px;padding:1rem;transition:all .2s;display:flex;position:absolute;top:100%;left:50%;transform:translate(-50%);box-shadow:0 10px 25px #00000080}.mega-menu-item:hover .mega-dropdown{opacity:1;visibility:visible;margin-top:0}.mega-dropdown:before{content:"";height:10px;position:absolute;top:-10px;left:0;right:0}.mega-dropdown-link{color:#8b949e;text-align:left;border-radius:4px;padding:.5rem;text-decoration:none;transition:all .2s;display:block}.mega-dropdown-link:hover{color:var(--accent-color);background-color:#2386361a}.mind-map-container{justify-content:center;padding:1rem 0 3rem;display:flex;overflow-x:auto}.mind-map-root{flex-direction:column;align-items:center;min-width:800px;display:flex}.mind-map-node{background-color:var(--secondary-bg);border:1px solid var(--border-color);text-align:center;z-index:2;border-radius:8px;padding:.75rem 1.25rem;font-weight:600;transition:transform .2s,border-color .2s;position:relative;box-shadow:0 4px 6px #0000001a}.mind-map-node:hover{border-color:var(--accent-color);transform:translateY(-2px)}.main-node{border:2px solid var(--accent-color);color:var(--accent-color);background-color:#2386361a;margin-bottom:2rem;font-size:1.25rem}.main-node:after{content:"";background-color:var(--border-color);width:2px;height:2rem;position:absolute;bottom:-2rem;left:50%;transform:translate(-50%)}.mind-map-branches{gap:2rem;width:100%;display:flex;position:relative}.mind-map-branch{flex-direction:column;flex:1;align-items:center;display:flex;position:relative}.mind-map-branch:before{content:"";background-color:var(--border-color);height:2px;position:absolute;top:-2rem;left:0;right:0}.mind-map-branch:first-child:before{left:50%}.mind-map-branch:last-child:before{right:50%}.vertical-drop{background-color:var(--border-color);width:2px;height:2rem;position:absolute;top:-2rem;left:50%;transform:translate(-50%)}.category-node{border-bottom:3px solid #8b949e;margin-bottom:2rem;font-size:1rem}.category-node:after{content:"";background-color:var(--border-color);width:2px;height:2rem;position:absolute;bottom:-2rem;left:50%;transform:translate(-50%)}.mind-map-leaves{flex-direction:column;align-items:center;gap:1.5rem;display:flex;position:relative}.mind-map-leaves:before{content:"";background-color:var(--border-color);z-index:1;width:2px;position:absolute;top:-2rem;bottom:20px;left:50%;transform:translate(-50%)}.skill-node{background-color:#010409;padding:.5rem 1rem;font-size:.9rem;font-weight:500}.learning-container{grid-template-columns:1fr 1fr;gap:3rem;display:grid}@media (width<=900px){.learning-container{grid-template-columns:1fr}}.timeline{padding-left:2rem;position:relative}.timeline:before{content:"";background-color:var(--border-color);width:2px;position:absolute;top:0;bottom:0;left:0}.timeline-item{margin-bottom:2rem;position:relative}.timeline-item:last-child{margin-bottom:0}.timeline-marker{background-color:var(--bg-color);border:2px solid var(--accent-color);width:1.5rem;height:1.5rem;color:var(--accent-color);z-index:2;border-radius:50%;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex;position:absolute;top:0;left:-2.75rem}.timeline-content{border-left:4px solid #0000;margin-bottom:0;transition:border-color .2s}.timeline-item:hover .timeline-content{border-left-color:var(--accent-color)}.questions-grid{flex-direction:column;gap:1rem;display:flex}.question-card{margin-bottom:0}.difficulty-badge{text-transform:uppercase;border-radius:12px;padding:.2rem .6rem;font-size:.75rem;font-weight:600}.difficulty-badge.easy{color:#2ea043;background-color:#2386361a;border:1px solid #2ea04366}.difficulty-badge.medium{color:#d29922;background-color:#d299221a;border:1px solid #d2992266}.difficulty-badge.hard{color:#f85149;background-color:#f851491a;border:1px solid #f8514966}.difficulty-badge.basic{color:#2ea043;background-color:#2ea0431a;border:1px solid #2ea04366}.grid-3x3{grid-template-columns:repeat(3,1fr);gap:1.5rem;display:grid}@media (width<=900px){.grid-3x3{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.grid-3x3{grid-template-columns:1fr}}.user-actions{justify-content:flex-end;align-items:center;gap:1rem;display:flex}.level-hud-below{width:100%;max-width:120px}.level-progress-bg{background-color:var(--border-color);border-radius:2px;width:100%;height:4px;overflow:hidden}.level-progress-fill{background-color:var(--accent-color);height:100%;transition:width .3s ease-out}.stats-btn{align-items:center;padding:.4rem .8rem;font-size:.9rem;display:flex}.profile-avatar{background:linear-gradient(135deg, var(--accent-color), #2ea043);color:#fff;border:2px solid #0000;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:1.1rem;font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s;display:flex;box-shadow:0 2px 8px #23863666}.profile-avatar:hover{border-color:#fff;transform:scale(1.05);box-shadow:0 4px 12px #23863699}.stats-header-card{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:2rem;display:flex}.stats-number{color:#fff;margin:.5rem 0;font-size:3rem;font-weight:700;line-height:1}.stats-number.primary{color:var(--accent-color)}.skill-matrix-row{justify-content:space-between;align-items:center;margin-bottom:1rem;display:flex}.skill-matrix-label{width:150px;font-weight:500}.progress-bar-bg{background-color:var(--bg-color);border-radius:4px;flex-grow:1;height:8px;margin:0 1rem;overflow:hidden}.progress-bar-fill{background-color:var(--accent-color);border-radius:4px;height:100%}.activity-item{border-bottom:1px solid var(--border-color);gap:1rem;padding:1rem 0;display:flex}.activity-item:last-child{border-bottom:none;padding-bottom:0}.activity-icon{background-color:var(--bg-color);border:1px solid var(--border-color);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.2rem;display:flex}