.rainbow-container{max-width:800px;margin:0 auto;padding:2rem;text-align:center;font-family:Arial,sans-serif;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh;display:flex;flex-direction:column;align-items:center}.rainbow-container h1{font-size:2.5rem;color:#333;margin-bottom:1rem;text-shadow:2px 2px 4px rgba(0,0,0,.1)}.rainbow-container p{font-size:1.2rem;color:#666;margin-bottom:2rem}.rainbow-container .input-section{width:100%;margin-bottom:2rem}.rainbow-container .input-section .input-textarea{width:100%;max-width:600px;padding:1rem;font-size:1.1rem;border:2px solid #ccc;border-radius:8px;resize:vertical;transition:border-color .3s ease,box-shadow .3s ease}.rainbow-container .input-section .input-textarea:focus{border-color:#ff6b6b;box-shadow:0 0 8px rgba(255,107,107,.3);outline:none}.rainbow-container .output-section{width:100%;background:#fff;padding:1.5rem;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.1)}.rainbow-container .output-section h2{font-size:1.5rem;color:#333;margin-bottom:1rem}.rainbow-container .output-section .output-preview{font-size:1.2rem;word-wrap:break-word;padding:1rem;background:#f9f9f9;border:1px solid #ddd;border-radius:4px;min-height:50px;text-align:left}.rainbow-container .output-section .copy-button{margin-top:1rem;padding:.75rem 1.5rem;font-size:1rem;color:#fff;background:#ff6b6b;border:none;border-radius:4px;cursor:pointer;transition:background .3s ease}.rainbow-container .output-section .copy-button:hover{background:#ff8787}.rainbow-container .output-section .copy-button:focus{outline:none;box-shadow:0 0 8px rgba(255,107,107,.5)}@media(max-width:600px){.rainbow-container{padding:1rem}.rainbow-container h1{font-size:2rem}.rainbow-container p{font-size:1rem}.rainbow-container .input-section .input-textarea{font-size:1rem;padding:.75rem}.rainbow-container .output-section{padding:1rem}.rainbow-container .output-section h2{font-size:1.2rem}.rainbow-container .output-section .output-preview{font-size:1rem}.rainbow-container .output-section .copy-button{padding:.5rem 1rem;font-size:.9rem}}