*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:#333}.container{max-width:1400px;margin:0 auto;padding:20px}header{text-align:center;margin-bottom:30px;color:#fff}header h1{font-size:2.5rem;margin-bottom:10px;text-shadow:0 2px 4px rgba(0,0,0,.3)}header p{font-size:1.2rem;opacity:.9}.demo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:20px;align-items:start}.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 8px 32px #0000001a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2)}.card.full-width{grid-column:1 / -1}.card h2{color:#4a5568;margin-bottom:20px;font-size:1.3rem;display:flex;align-items:center;gap:8px}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:6px;font-weight:500;color:#4a5568}input[type=text],input[type=number],textarea,select{width:100%;padding:12px;border:2px solid #e2e8f0;border-radius:8px;font-size:14px;transition:border-color .2s}input[type=text]:focus,input[type=number]:focus,textarea:focus,select:focus{outline:none;border-color:#667eea}textarea{min-height:80px;resize:vertical}input[type=range]{width:calc(100% - 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