:root,[data-theme=light]{--bg-color:#f8f9fa;--text-color:#0f172a;--heading-color:#0f172a;--text-muted:#475569;--accent-color:#2ea043;--accent-hover:#238636;--secondary-bg:#fff;--border-color:#e2e8f0;--header-bg:#fff;--circle-btn-bg:#e2e8f0;--circle-btn-hover:#cbd5e1;--circle-btn-text:#0f172a;--card-bg-overlay-1:#ffffffeb;--card-bg-overlay-2:#f8f9faf5;--modal-overlay-bg:#0f172aa6;--modal-card-bg:#fff;--modal-card-border:#e2e8f0;--modal-text-color:#0f172a;--modal-muted-color:#475569;--ad-bg:#fff;--ad-border:#e2e8f0;--error-color:#ef4444;--success-color:#2ea043;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}[data-theme=dark]{--bg-color:#0d1117;--text-color:#c9d1d9;--heading-color:#f0f6fc;--text-muted:#8b949e;--accent-color:#238636;--accent-hover:#2ea043;--secondary-bg:#161b22;--border-color:#30363d;--header-bg:#161b22;--circle-btn-bg:#30363d;--circle-btn-hover:#484f58;--circle-btn-text:#f0f6fc;--card-bg-overlay-1:#0d1117e6;--card-bg-overlay-2:#161b22f5;--modal-overlay-bg:#030712eb;--modal-card-bg:#161b22;--modal-card-border:#30363d;--modal-text-color:#f0f6fc;--modal-muted-color:#8b949e;--ad-bg:#0d1117;--ad-border:#30363d}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw;margin:0;padding:0;overflow-x:hidden}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;transition:background-color .3s,color .3s}.app-container{flex-direction:column;max-width:1150px;min-height:100vh;margin:0 auto;padding:1.5rem 1.75rem;display:flex}h1,h2,h3,h4{color:var(--heading-color);margin-bottom:1rem}p{color:var(--text-muted);margin-bottom:1rem}.btn{background-color:var(--accent-color);color:#fff;cursor:pointer;text-align:center;border:none;border-radius:8px;padding:.55rem 1.2rem;font-size:.95rem;font-weight:700;text-decoration:none;transition:background-color .2s,transform .1s,box-shadow .2s;display:inline-block}.btn:hover{background-color:var(--accent-hover);box-shadow:0 4px 12px #2ea04340}.btn:active{transform:scale(.98)}.btn-secondary{background-color:var(--circle-btn-bg);border:1px solid var(--border-color);color:var(--heading-color);font-weight:600}.btn-secondary:hover{background-color:var(--circle-btn-hover);border-color:var(--accent-color);color:var(--heading-color)}.card{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-radius:12px;margin-bottom:1rem;padding:1.5rem;transition:border-color .2s,box-shadow .2s,transform .2s;box-shadow:0 4px 12px #0000000a}.card:hover{border-color:var(--accent-color);transform:translateY(-2px);box-shadow:0 8px 24px #00000014}.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-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}.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-card{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-radius:14px;flex-direction:column;justify-content:space-between;padding:1.6rem;transition:all .25s;display:flex;box-shadow:0 4px 15px #0000000a}.company-card:hover{border-color:var(--accent-color);transform:translateY(-3px);box-shadow:0 8px 25px #00000014}.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:44px;height:44px;color:var(--company-color);border-radius:10px;justify-content:center;align-items:center;font-size:1.35rem;font-weight:800;display:flex;box-shadow:0 2px 8px #0000000a}.company-card h3{color:var(--heading-color);margin:0;font-size:1.25rem;font-weight:700}.company-card p{color:var(--text-muted);flex-grow:1;margin-bottom:1.5rem;font-size:.9rem;line-height:1.5}.header-wrapper{background-color:var(--header-bg);border-bottom:1px solid var(--border-color);z-index:1000;margin-top:0;margin-bottom:.5rem;padding-top:0;transition:background-color .3s,border-color .3s;position:sticky;top:0;box-shadow:0 1px 6px #00000008}.header-top{justify-content:space-between;align-items:center;max-width:1150px;margin:0 auto;padding:.35rem 1.75rem;display:flex}.logo{color:var(--heading-color);align-items:center;gap:.4rem;font-size:1.2rem;font-weight:800;display:flex}.logo span{color:var(--accent-color)}.circle-icon-btn{background-color:var(--circle-btn-bg);width:30px;height:30px;color:var(--circle-btn-text);border:1px solid var(--border-color);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;font-size:.85rem;font-weight:700;text-decoration:none;transition:all .2s;display:flex;box-shadow:0 1px 4px #0000000a}.circle-icon-btn:hover{background-color:var(--circle-btn-hover);transform:scale(1.06)}.mega-menu{z-index:50;align-items:center;gap:.85rem;padding:0;display:flex;position:relative}.mega-menu-item{cursor:pointer;color:var(--heading-color);align-items:center;gap:.25rem;padding:.35rem .6rem;font-size:.98rem;font-weight:700;transition:color .2s;display:flex;position:relative}.mega-menu-item:hover{color:var(--accent-color)}.mega-menu-item .chevron{font-size:.75rem;transition:transform .25s,color .2s;display:inline-block}.mega-menu-item:hover .chevron{color:var(--accent-color);transform:rotate(180deg)}.mega-dropdown{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-top:3.5px solid var(--accent-color);opacity:0;visibility:hidden;z-index:1000;border-radius:4px;flex-direction:column;gap:.1rem;min-width:250px;padding:.5rem 0;transition:opacity .2s,transform .2s,visibility .2s;display:flex;position:absolute;top:100%;left:0;transform:translateY(6px);box-shadow:0 10px 30px #0000001f}.mega-menu-item:hover .mega-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.mega-dropdown:before{content:"";height:12px;position:absolute;top:-12px;left:0;right:0}.mega-dropdown-link{color:var(--heading-color);text-align:left;border-left:3px solid #0000;padding:.65rem 1.25rem;font-size:.92rem;font-weight:600;line-height:1.4;text-decoration:none;transition:all .2s;display:block}.mega-dropdown-link:hover{background-color:var(--bg-color);color:var(--accent-color);border-left-color:var(--accent-color)}.secondary-nav{border-top:1px solid var(--border-color);background-color:var(--header-bg);scrollbar-width:none;align-items:center;gap:1.5rem;max-width:1150px;margin:0 auto;padding:.35rem 1.75rem;transition:background-color .3s,border-color .3s;display:flex;overflow-x:auto}.secondary-nav::-webkit-scrollbar{display:none}.secondary-nav-item{color:var(--text-muted);white-space:nowrap;font-size:.82rem;font-weight:600;text-decoration:none;transition:color .2s}.secondary-nav-item:hover{color:var(--accent-color)}.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}