:root{--amazon-orange: #FF9900;--amazon-orange-dark: #E88B00;--amazon-orange-light: #FFB84D;--amazon-dark: #232F3E;--amazon-dark-light: #37475A;--success: #4CAF50;--error: #F44336;--white: #FFFFFF;--gray-100: #F5F5F5;--gray-200: #EEEEEE;--gray-300: #E0E0E0;--gray-600: #757575}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,var(--amazon-dark) 0%,var(--amazon-dark-light) 100%);min-height:100vh;color:var(--white)}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn-primary{background:var(--amazon-orange);color:var(--amazon-dark)}.btn-primary:hover{background:var(--amazon-orange-dark);transform:translateY(-2px)}.btn-secondary{background:var(--white);color:var(--amazon-dark)}.btn-secondary:hover{background:var(--gray-200)}.btn-danger{background:var(--error);color:var(--white)}.btn-success{background:var(--success);color:var(--white)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.card{background:var(--white);border-radius:16px;padding:1.5rem;color:var(--amazon-dark);box-shadow:0 4px 20px #0003}.input{width:100%;padding:.75rem 1rem;border:2px solid var(--gray-300);border-radius:8px;font-size:1rem;transition:border-color .2s}.input:focus{outline:none;border-color:var(--amazon-orange)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--amazon-dark)}.container{max-width:1200px;margin:0 auto;padding:1rem;width:100%}.text-center{text-align:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.w-full{width:100%}.error-text{color:var(--error);font-size:.9rem;margin-bottom:1rem;text-align:center}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.5rem;color:var(--amazon-orange)}@media(max-width:768px){.container{padding:.5rem}.card{padding:1rem}.btn{padding:.6rem 1rem;font-size:.9rem}}