*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#0e1117;color:#f0f0f0;line-height:1.6;padding:2rem}h1{margin-bottom:2rem;font-size:2rem}a{color:#fff;text-decoration:none}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}.coin-card{background-color:#161b22;padding:1.5rem;border-radius:12px;box-shadow:0 0 10px #0000004d;transition:transform .2s ease}.coin-card:hover{transform:translateY(-5px)}.coin-header{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.coin-image{width:40px;height:40px}.symbol{font-size:.9rem;color:#aaa}.positive{color:#4caf50}.negative{color:#f44336}.top-controls{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;gap:1rem;flex-wrap:wrap}.top-controls .filter{flex:1}.top-controls .controls{flex-shrink:0}.controls{display:flex;align-items:center;justify-content:end;gap:.75rem}.controls label{font-weight:700}.controls select{padding:.5rem 1rem;border-radius:8px;border:none;background:#1c1f26;color:#fff}.filter input{width:100%;min-width:200px;padding:.75rem;border-radius:8px;border:none;background:#1c1f26;color:#fff;font-size:1rem}.about{max-width:600px;margin:0 auto;background-color:#161b22;padding:2rem;border-radius:12px;box-shadow:0 0 10px #0000004d}.about h1{margin-bottom:1rem}.about p{margin-bottom:1rem;line-height:1.6}.top-nav{display:flex;justify-content:flex-end;gap:1rem;margin-bottom:1rem}.top-nav a{color:#58a6ff;text-decoration:none;font-weight:700;transition:color .2s ease}.top-nav a:hover{color:#4090db}.coin-details-container{max-width:700px;background-color:#141a25;font-family:Arial,sans-serif;color:#555d67;padding:20px;border-radius:8px;box-shadow:0 4px 8px #0000001a;margin:40px auto;text-align:center}.coin-details-container a{display:inline-block;margin-bottom:20px;text-decoration:none;color:#007bff;font-weight:700;transition:color .3s}.coin-details-container a:hover{color:#0056b3}.coin-details-title{font-size:36px;margin-bottom:10px}.coin-details-image{width:100px;margin-bottom:20px}.coin-details-description{font-size:16px;margin-bottom:20px;color:#141a25}.coin-details-info h3,.coin-details-info h4{margin:10px 0;color:#f2f2f2}.coin-details-info h3{font-size:22px}.coin-details-info h4{font-size:16px}.coin-details-links{margin-top:20px}.coin-details-links a{color:#007bff;text-decoration:none}.coin-details-links a:hover{text-decoration:underline}