.app-container{font-family:Arial,sans-serif;padding:20px;min-height:100vh;text-align:center;background:linear-gradient(270deg,indigo,#8a2be2);background-size:800% 800%;animation:gradientMove 15s ease infinite;display:flex;justify-content:center;align-items:center}@keyframes gradientMove{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.card{background:#ffffffe6;background:linear-gradient(135deg,#e6d7fff2,#f5e6fff2);padding:30px;border-radius:20px;box-shadow:0 8px 25px #4b008266;width:450px;max-width:90%}h1{margin-bottom:20px;color:indigo;font-size:28px}textarea,input[type=text]{width:100%;box-sizing:border-box;padding:10px;border-radius:8px;border:1px solid #9370db;background-color:#f3e8ff;font-size:16px;margin-bottom:15px;resize:none;color:indigo}.button-row{display:flex;gap:10px;justify-content:center;margin-bottom:20px}button{padding:10px 15px;border-radius:8px;border:none;cursor:pointer;font-weight:700;background:linear-gradient(135deg,#6a0dad,#9370db);color:#fff;transition:all .3s ease}button:hover{background:linear-gradient(135deg,#8a2be2,#b19cd9)}.output{margin-top:20px;background-color:#f3e8ff;padding:15px;border-radius:10px;border:1px solid #d8b4fe;color:indigo}.output h2{margin-bottom:10px;font-size:18px}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:#4b0082b3;display:flex;align-items:center;justify-content:center}.modal-content{background:linear-gradient(135deg,#f0e6fffa,#fff0fffa);width:70%;max-width:800px;height:60%;padding:20px;border-radius:15px;overflow:hidden;display:flex;flex-direction:column;border:2px solid #9370db}.mapping-header{display:grid;grid-template-columns:1fr 1fr;font-weight:700;background:#d8b4fe;padding:8px;border-bottom:2px solid #a78bfa;color:indigo}.mapping-grid{flex:1;display:grid;grid-template-columns:1fr 1fr;overflow-y:auto;padding:10px;background:#f3e8ff}.mapping-item{display:contents}.mapping-token,.mapping-char{padding:8px;border-bottom:1px solid #ddd;border-right:1px solid #ddd}.mapping-token{background:#e9d5ff;font-weight:700}.mapping-char{background:#ede9fe}.close-btn{margin-top:10px;background:linear-gradient(135deg,#8a2be2,#a78bfa);color:#fff}.close-btn:hover{background:linear-gradient(135deg,#b19cd9,#d8b4fe)}body{margin:0;font-family:Arial,sans-serif}