:root{--btn-bg:#fff;--btn-bg-hover:#f8fafc;--btn-bg-active:#f1f5f9;--btn-border:#94a3b8;--btn-text:#0f172a;--btn-disabled-bg:#e2e8f0;--btn-disabled-border:#94a3b8;--btn-disabled-text:#475569}button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--btn-border);background:var(--btn-bg);color:var(--btn-text);border-radius:8px;padding:7px 11px;font:inherit;font-size:14px;font-weight:600;line-height:1.2;cursor:pointer;transition:background-color .12s ease,border-color .12s ease,transform .04s ease}button:hover:not(:disabled){background:var(--btn-bg-hover);border-color:#64748b}button:active:not(:disabled){background:var(--btn-bg-active);transform:translateY(1px)}button:disabled{background:var(--btn-disabled-bg);border-color:var(--btn-disabled-border);color:var(--btn-disabled-text);cursor:not-allowed;opacity:.9}