:root{--azul: #0f2350;--dourado: #f5c842;--madeira: #3a2817;--preto: #0a0a0a;--texto: #f5f5f5;--texto-secundario: #a0a0a0}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{font-family:Inter,system-ui,sans-serif;background:linear-gradient(180deg,#1a0f08,#0a0a0a);color:var(--texto)}button{font-family:inherit;cursor:pointer;border:none;border-radius:10px;padding:12px 24px;font-weight:600;transition:transform .15s}button:hover{transform:translateY(-2px)}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--dourado);color:var(--preto)}.btn-secondary{background:transparent;color:var(--texto);border:1px solid #333}.btn-danger{background:#8b2020;color:#fff}