*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;color:#333}.container{max-width:900px;margin:0 auto;padding:20px;display:flex;flex-direction:column;min-height:100vh}.header{text-align:center;color:#fff;margin-bottom:40px;padding:20px 0}.header h1{font-size:2.5rem;margin-bottom:10px;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.header p{font-size:1.1rem;opacity:.9}.main{flex:1;display:flex;flex-direction:column;gap:30px}.card{background:white;border-radius:12px;padding:30px;box-shadow:0 10px 30px #0003}.card h2{color:#667eea;margin-bottom:20px;font-size:1.5rem}.input-group{display:flex;flex-direction:column;gap:15px;margin-bottom:20px}.input-field{padding:12px 15px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;font-family:inherit;resize:vertical;transition:border-color .3s ease}.input-field:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.input-field:disabled{background-color:#f5f5f5;cursor:not-allowed}.btn-send{padding:12px 24px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;box-shadow:0 4px 15px #667eea4d}.btn-send:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea66}.btn-send:active:not(:disabled){transform:translateY(0)}.btn-send:disabled{opacity:.7;cursor:not-allowed}.alert{padding:15px 20px;border-radius:8px;margin-bottom:15px;border-left:4px solid}.alert strong{display:block;margin-bottom:8px}.alert-error{background-color:#ffebee;border-left-color:#f44336;color:#c62828}.alert-success{background-color:#e8f5e9;border-left-color:#4caf50;color:#2e7d32}.alert p{margin:0;word-break:break-word;white-space:pre-wrap}.info-section{background:white;border-radius:12px;padding:30px;box-shadow:0 10px 30px #0003}.info-section h3{color:#667eea;margin-bottom:20px;font-size:1.3rem}.info-section ul{list-style:none}.info-section li{padding:10px 0;border-bottom:1px solid #f0f0f0;display:flex;justify-content:space-between}.info-section li:last-child{border-bottom:none}.info-section strong{color:#667eea}.footer{text-align:center;color:#fff;padding:20px 0;margin-top:40px;opacity:.8}@media (max-width: 768px){.header h1{font-size:2rem}.card,.info-section{padding:20px}.input-field{font-size:16px}}