:root{--color-primary: 99 102 241;--color-primary-dark: 79 70 229;--color-secondary: 139 92 246;--color-accent: 238 242 255;--color-surface: 255 255 255;--color-text: 17 24 39;--color-border: 229 231 235}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:linear-gradient(135deg,rgb(var(--color-accent)),rgb(var(--color-surface)));color:rgb(var(--color-text));min-height:100vh}.card{background:rgb(var(--color-surface));border-radius:1rem;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;padding:2rem;transition:all .3s}.card:hover{box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d}.btn-primary{background:linear-gradient(135deg,rgb(var(--color-primary)),rgb(var(--color-secondary)));color:#fff;padding:.75rem 1.5rem;border-radius:.5rem;font-weight:600;border:none;cursor:pointer;transition:all .2s}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(var(--color-primary),.4)}.input-field{width:100%;padding:.75rem 1rem;border:2px solid rgb(var(--color-border));border-radius:.5rem;font-size:1rem;transition:all .2s}.input-field:focus{outline:none;border-color:rgb(var(--color-primary));box-shadow:0 0 0 3px rgba(var(--color-primary),.1)}.select-field{width:100%;padding:.75rem 1rem;border:2px solid rgb(var(--color-border));border-radius:.5rem;font-size:1rem;background-color:#fff;cursor:pointer;transition:all .2s}.select-field:focus{outline:none;border-color:rgb(var(--color-primary));box-shadow:0 0 0 3px rgba(var(--color-primary),.1)}.category-btn{padding:.75rem 1.5rem;border-radius:.5rem;font-weight:500;border:2px solid rgb(var(--color-border));background:#fff;cursor:pointer;transition:all .2s}.category-btn:hover{border-color:rgb(var(--color-primary));color:rgb(var(--color-primary))}.category-btn.active{background:linear-gradient(135deg,rgb(var(--color-primary)),rgb(var(--color-secondary)));color:#fff;border-color:transparent}.swap-icon{display:inline-block;transition:transform .3s}.swap-icon:hover{transform:rotate(180deg)}