.app-footer{background:var(--glass-bg-strong);-webkit-backdrop-filter:var(--glass-blur);border-top:1px solid var(--glass-border-accent);color:#555;margin-top:auto;padding:1.25rem 2rem;box-shadow:0 -4px 20px #667eea14}.footer-content{grid-template-columns:1fr auto 1fr;align-items:center;gap:2rem;max-width:1200px;margin:0 auto;display:grid}.footer-column{flex-direction:column;gap:.25rem;display:flex}.footer-copyright{justify-self:start}.footer-text{color:#555;margin:0;font-size:.9rem;font-weight:400}.footer-center{text-align:center;align-items:center}.footer-links{justify-content:center;gap:1.5rem;display:flex}.footer-links a{color:var(--accent-primary);font-size:.85rem;text-decoration:none;transition:color .2s}.footer-links a:hover{color:var(--accent-secondary);text-decoration:underline}.footer-dev{color:#888;margin:.5rem 0 0;font-size:.8rem}.footer-dev strong{color:var(--accent-primary);font-weight:600}.footer-version-col{justify-self:end;align-items:flex-end}.footer-version{letter-spacing:.5px;color:var(--accent-primary);background:#667eea1a;border:1px solid #667eea33;border-radius:12px;padding:.35rem .75rem;font-size:.8rem;font-weight:500}@media (max-width:768px){.footer-content{text-align:center;grid-template-columns:1fr;gap:1rem}.footer-column{justify-self:center!important;align-items:center!important}.footer-links{flex-wrap:wrap;gap:1rem}.footer-text{font-size:.85rem}.footer-dev,.footer-version{font-size:.75rem}}
*{box-sizing:border-box;margin:0;padding:0}:root{--bg-gradient:linear-gradient(135deg,#e0e7ff 0%,#f0f4ff 50%,#faf5ff 100%);--glass-bg:#fff9;--glass-bg-hover:#fffc;--glass-bg-strong:#ffffffd9;--glass-border:#ffffffb3;--glass-border-accent:#667eea40;--glass-blur:blur(16px);--glass-blur-strong:blur(24px);--glass-shadow:0 8px 32px #667eea1f;--glass-shadow-hover:0 12px 40px #667eea38;--glass-radius:16px;--glass-radius-sm:12px;--accent-primary:#667eea;--accent-secondary:#764ba2;--accent-gradient:linear-gradient(135deg,#667eea,#764ba2);--accent-shadow:#667eea59}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f0f4ff;background-image:radial-gradient(at 15% 15%,#c7d2fe 0,#0000 50%),radial-gradient(at 85% 10%,#e0e7ff 0,#0000 45%),radial-gradient(at 80% 80%,#ddd6fe 0,#0000 50%),radial-gradient(at 20% 85%,#ede9fe 0,#0000 45%),radial-gradient(#e0e7ff 0,#0000 60%);background-attachment:fixed;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.App{background:0 0;min-height:100vh}.main-navigation{background:var(--glass-bg-strong);-webkit-backdrop-filter:var(--glass-blur-strong);box-shadow:var(--glass-shadow);border-bottom:1px solid var(--glass-border);z-index:1000;justify-content:space-between;align-items:center;padding:1.5rem 2rem;display:flex;position:sticky;top:0}.nav-brand h1{color:#667eea;align-items:center;gap:.5rem;margin:0;font-size:1.8rem;font-weight:700;display:flex}.beta-badge{letter-spacing:.08em;text-transform:uppercase;color:#667eea;vertical-align:middle;background:#667eea1f;border:1px solid #667eea59;border-radius:4px;align-self:center;padding:2px 6px;font-size:.55rem;font-weight:700;line-height:1}.nav-subtitle{color:#666;margin:0;font-size:.9rem;font-weight:400}.nav-links{gap:1rem;display:flex}.nav-button{color:#333;cursor:pointer;background:#f5f5f5;border:2px solid #0000;border-radius:12px;align-items:center;gap:.5rem;padding:.8rem 1.5rem;font-size:1rem;font-weight:600;transition:all .3s;display:flex}.nav-button:hover{background:#e8e8e8;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.nav-button.active{color:#667eea;box-shadow:none;background:#667eea26;border:2px solid #667eea}.nav-button-cta{color:#fff;cursor:pointer;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border:2px solid #667eea;border-radius:12px;align-items:center;gap:.5rem;padding:.8rem 1.5rem;font-size:1rem;font-weight:600;text-decoration:none;transition:all .3s;display:flex}.nav-button-cta:hover{background:linear-gradient(135deg,#5a6fd6 0%,#6a4190 100%);transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.nav-icon{flex-shrink:0;align-items:center;display:inline-flex}.main-content{min-height:calc(100vh - 100px);padding:0}.home-page{background:0 0;min-height:calc(100vh - 100px);padding:3rem 2rem}.home-header{text-align:center;color:#333;margin-bottom:4rem;animation:.8s fadeInDown}.home-title{letter-spacing:-1px;background:var(--accent-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0 0 1rem;font-size:3.5rem;font-weight:800}.home-subtitle{color:var(--accent-primary);margin:0 0 1rem;font-size:1.5rem;font-weight:500}.home-description{color:#555;margin:0;font-size:1.1rem;font-weight:400}.tiles-container{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem;max-width:1200px;margin:0 auto;animation:1s fadeInUp;display:grid}.tile{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--glass-radius);cursor:pointer;box-shadow:var(--glass-shadow);flex-direction:column;min-height:380px;padding:2rem;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden}.tile:before{content:"";transform-origin:0;background:linear-gradient(90deg,#667eea 0%,#764ba2 100%);width:100%;height:4px;transition:transform .4s;position:absolute;top:0;left:0;transform:scaleX(0)}.tile:hover:before{transform:scaleX(1)}.tile:hover{background:var(--glass-bg-hover);box-shadow:var(--glass-shadow-hover);transform:translateY(-8px)scale(1.02)}.tile-icon{background:var(--accent-gradient);width:64px;height:64px;box-shadow:0 4px 16px var(--accent-shadow);color:#fff;border-radius:18px;justify-content:center;align-items:center;margin-bottom:1.25rem;transition:transform .3s;display:flex}.tile:hover .tile-icon{transform:scale(1.1)rotate(3deg)}.tile-title{color:#333;margin:0 0 1rem;font-size:1.8rem;font-weight:700}.tile-description{color:#666;flex-grow:1;margin:0 0 1.5rem;font-size:1rem;line-height:1.6}.tile-features{margin:0 0 1.5rem;padding:0;list-style:none}.tile-features li{color:#555;align-items:center;gap:.5rem;padding:.4rem 0;font-size:.95rem;line-height:1.4;display:flex}.tile-badge{color:#fff;text-align:center;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-radius:20px;padding:.5rem 1rem;font-size:.85rem;font-weight:600;position:absolute;top:1rem;right:1rem}.tile-badge.coming-soon{background:linear-gradient(135deg,orange 0%,tomato 100%)}.tile-button{background:var(--accent-gradient);color:#fff;cursor:pointer;border:none;border-radius:10px;justify-content:center;align-items:center;gap:.5rem;width:100%;margin-top:auto;padding:.9rem 1.5rem;font-size:1rem;font-weight:600;transition:all .3s;display:flex}.tile-button:hover{transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.tile-button:active{transform:translateY(0)}.tile-algos{border-top:4px solid #667eea}.tile-algos .tile-title{color:#667eea}.tile-problems{border-top:4px solid #764ba2}.tile-problems .tile-title{color:#764ba2}.tile-quizz{opacity:.85;cursor:not-allowed;border-top:4px solid #48bb78}.tile-quizz:hover{transform:translateY(-4px)scale(1.01)}.tile-quizz .tile-title{color:#48bb78}.tile-interview{opacity:.85;cursor:not-allowed;border-top:4px solid #ed8936}.tile-interview:hover{transform:translateY(-4px)scale(1.01)}.tile-interview .tile-title{color:#ed8936}.tile-datastructures{border-top:4px solid #4299e1}.tile-datastructures:hover{transform:translateY(-4px)scale(1.01)}.tile-datastructures .tile-title{color:#4299e1}.tile-progress{opacity:.85;cursor:not-allowed;border-top:4px solid #9f7aea}.tile-progress:hover{transform:translateY(-4px)scale(1.01)}.tile-progress .tile-title{color:#9f7aea}.home-footer{text-align:center;color:#666;margin-top:4rem;padding:2rem 0;font-size:1.1rem;font-weight:400}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.burger-menu{cursor:pointer;z-index:1001;background:0 0;border:none;flex-direction:column;gap:5px;padding:8px;transition:all .3s;display:none}.burger-menu span{background:#667eea;border-radius:3px;width:28px;height:3px;transition:all .3s}.burger-menu.open span:first-child{transform:rotate(45deg)translate(7px,7px)}.burger-menu.open span:nth-child(2){opacity:0}.burger-menu.open span:nth-child(3){transform:rotate(-45deg)translate(7px,-7px)}.nav-user-section{align-items:center;gap:1rem;display:flex}.nav-user-email{color:#666;font-size:.9rem}.nav-logout{color:#fff!important;background:#f44!important}@media (max-width:768px){.burger-menu{display:flex}.nav-links{background:var(--glass-bg-strong);-webkit-backdrop-filter:var(--glass-blur-strong);border-bottom:1px solid var(--glass-border);box-shadow:var(--glass-shadow);opacity:0;flex-direction:column;max-height:calc(100vh - 80px);padding:1rem;transition:all .3s;position:fixed;top:80px;left:0;right:0;overflow-y:auto;transform:translate(-100%)}.nav-links.mobile-open{opacity:1;transform:translate(0)}.nav-user-section{flex-direction:column;gap:.75rem;width:100%}.nav-user-email{text-align:center;width:100%}.nav-button{justify-content:center;width:100%}.home-page{padding:2rem 1rem}.home-header{margin-bottom:2rem}.home-title{font-size:2.5rem}.home-subtitle{font-size:1.2rem}.home-description{font-size:1rem}.tiles-container{grid-template-columns:1fr;gap:1.5rem}.tile{min-height:320px;padding:1.5rem}.tile-icon{font-size:3rem}.tile-title{font-size:1.5rem}.home-footer{margin-top:2rem;font-size:1rem}}.nav-user-dropdown{margin-left:auto;position:relative}.nav-user-button{cursor:pointer;color:#333;background:#667eea1a;border:1px solid #667eea4d;border-radius:8px;align-items:center;gap:.5rem;padding:.75rem 1rem;font-size:.95rem;transition:all .3s;display:flex}.nav-user-button:hover{background:#667eea33;border-color:#667eea80;transform:translateY(-1px)}.nav-user-email{text-overflow:ellipsis;white-space:nowrap;max-width:200px;overflow:hidden}.dropdown-arrow{font-size:.7rem;transition:transform .3s}.user-dropdown-menu{background:var(--glass-bg-strong);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow-hover);z-index:1001;border-radius:12px;min-width:200px;animation:.2s ease-out dropdown-appear;position:absolute;top:calc(100% + .5rem);right:0;overflow:hidden}@keyframes dropdown-appear{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.dropdown-item{text-align:left;cursor:pointer;color:#333;background:0 0;border:none;align-items:center;gap:.75rem;width:100%;padding:1rem 1.25rem;font-size:.95rem;text-decoration:none;transition:background .2s;display:flex}.dropdown-item:hover{background:#667eea1a}.dropdown-item.logout-item{color:#e74c3c;border-top:1px solid #eee}.dropdown-item.logout-item:hover{background:#e74c3c1a}@media (max-width:768px){.nav-user-dropdown{width:100%;margin-left:0}.nav-user-button{justify-content:space-between;width:100%}.user-dropdown-menu{box-shadow:none;margin-top:.5rem;animation:none;position:static}.nav-user-email{max-width:none}}