:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#000;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;background-color:#000;color:#fff}.app-container{display:flex;min-height:100vh;background-color:#000}.sidebar{width:250px;background:linear-gradient(180deg,#1a1a1a,#2a2a2a);border-right:1px solid #333;padding:2rem 0;position:fixed;height:100vh;overflow-y:auto}.sidebar-header{padding:0 2rem 1.5rem;border-bottom:1px solid #333;margin-bottom:1.5rem}.sidebar-header h2{font-size:1.2rem;font-weight:600;color:#4caf50}.sidebar-nav{padding:0 1rem}.nav-item{padding:.8rem 1rem;border-radius:6px;cursor:pointer;transition:all .3s ease;margin-bottom:.5rem;font-size:.95rem}.nav-item:hover{background:#4caf501a;color:#4caf50}.nav-item.active{background:linear-gradient(90deg,#4caf5033,#4caf501a);color:#4caf50;border-left:3px solid #4CAF50}.main-content{flex:1;margin-left:250px;max-width:calc(100% - 250px);padding:2rem}.header{margin-bottom:3rem;text-align:center}.header h1{font-size:2.5rem;font-weight:700;margin-bottom:1rem;background:linear-gradient(90deg,#4caf50,#45a049);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.tool-stack{font-size:1rem;color:#888;margin-bottom:2rem}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.card{background:linear-gradient(135deg,#1a1a1a,#2a2a2a);border-radius:12px;padding:1.5rem;border:1px solid #333;transition:all .3s ease;cursor:pointer;position:relative;overflow:hidden}.card:hover{transform:translateY(-5px);box-shadow:0 10px 20px #4caf5033;border-color:#4caf50}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#4caf50,#45a049)}.card-header{display:flex;align-items:center;margin-bottom:1rem}.card-icon{width:40px;height:40px;border-radius:8px;background:#333;display:flex;align-items:center;justify-content:center;margin-right:1rem;font-size:1.2rem}.card-title{font-size:1.1rem;font-weight:600;flex:1}.card-description{font-size:.9rem;color:#aaa;margin-bottom:1rem}.card-category{font-size:.8rem;color:#888;margin-bottom:.8rem;text-transform:uppercase;letter-spacing:.5px}.card-price{font-size:.9rem;font-weight:600;color:#4caf50;background:#4caf501a;padding:.3rem .6rem;border-radius:4px;display:inline-block}.add-form{background:linear-gradient(135deg,#1a1a1a,#2a2a2a);border-radius:12px;padding:2rem;margin-bottom:3rem;border:1px solid #333}.add-form h2{font-size:1.5rem;margin-bottom:1.5rem;color:#4caf50}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group input{width:100%;padding:.8rem;border:1px solid #333;border-radius:6px;background:#2a2a2a;color:#fff;font-size:1rem}.form-group input:focus{outline:none;border-color:#4caf50;box-shadow:0 0 0 3px #4caf501a}.btn{background:linear-gradient(90deg,#4caf50,#45a049);color:#fff;border:none;padding:.8rem 1.5rem;border-radius:6px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn:hover{transform:translateY(-2px);box-shadow:0 4px 8px #4caf504d}.btn:active{transform:translateY(0)}@media (max-width: 768px){.app-container{flex-direction:column}.sidebar{width:100%;height:auto;position:relative;padding:1rem 0}.sidebar-nav{display:flex;overflow-x:auto;padding:0 1rem}.nav-item{white-space:nowrap;margin-right:.5rem;margin-bottom:0}.main-content{margin-left:0;max-width:100%;padding:1rem}.header h1{font-size:2rem}.card-grid{grid-template-columns:1fr}}