:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.header{background-color:#f8f9fa;padding:20px;display:flex;justify-content:space-between;align-items:center;width:100%;box-sizing:border-box;position:fixed;top:0;left:0;z-index:1000}.header h1{margin:0;font-size:2rem;flex-grow:1;text-align:center}.header-icon{font-size:1.5rem}@media (max-width: 600px){.header h1{font-size:1.5rem}.header-icon{font-size:1.2rem}}.study-guides-button{background-color:#007bff;color:#fff;border:none;padding:10px 20px;cursor:pointer;transition:background-color .3s;position:relative;left:-10px}.study-guides-button:hover{background-color:#0056b3}.card{display:flex;flex-direction:column;justify-content:space-between;flex:1 1 calc(25% - 40px);box-sizing:border-box;margin:10px;border:1px solid #ccc;border-radius:8px;overflow:hidden;text-align:center;padding:16px}.card-content{flex-grow:1}.card-icons{display:flex;justify-content:space-around;margin-top:16px}.card-counts{display:flex;justify-content:space-around;margin-top:8px}.icon{font-size:24px;cursor:pointer;transition:color .3s}.icon:hover{color:#007bff}.card-counts span{font-size:16px;font-weight:700}.card{border:1px solid #ccc;border-radius:8px;padding:16px;margin:10px;flex:1;min-width:200px;box-shadow:0 2px 5px #0000001a}.cards-container{display:flex;flex-direction:column;gap:20px}.guias-de-estudio{padding-top:80px}.content{padding:20px;max-width:1200px;margin:0 auto}.cards-container{display:flex;flex-wrap:wrap;justify-content:center;gap:20px;margin-top:30px}.card{width:300px;margin:0}.science-news-search-container{margin:20px auto;padding:20px;background-color:#f0f0f0;border-radius:8px;box-shadow:0 2px 4px #0000001a;max-width:600px;text-align:center}.search-form{display:flex;gap:10px;justify-content:center}.search-input{padding:10px;border:1px solid #ccc;border-radius:4px;flex-grow:1;font-size:1rem}.search-button{padding:10px 20px;background-color:#007bff;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:1rem;transition:background-color .3s ease}.search-button:hover{background-color:#0056b3}.search-results{margin-top:20px;text-align:left}.search-result-item{margin-bottom:10px;padding:10px;background-color:#fff;border:1px solid #eee;border-radius:4px}.search-result-item a{text-decoration:none;color:#007bff;font-weight:700}.search-result-item a:hover{text-decoration:underline}.error-message{color:#007bff;margin-top:10px;font-weight:700}.App{display:flex;flex-direction:column;align-items:center;margin-top:50px}.card-container{display:flex;flex-wrap:wrap;justify-content:center;width:100%;padding:20px;box-sizing:border-box;margin:0 auto;gap:20px}.card{flex:1 1 calc(25% - 40px);box-sizing:border-box;margin:10px;border:1px solid #ccc;border-radius:8px;overflow:hidden;text-align:center;padding:16px}