body open bracket margin colon0 semicolon, font family colon Arial, sans-serif semicolon, background colon F5F7FB semicolon, color colon 222 semicolon, text-align

colon center semicolon H1 color colon3B82F6 semicolon, margin-top colon 60px semicolon, button background colon3B82F6 semicolon, color colon white, border none, padding colon 12px24px, margin colon 10px, border-radius colon 8px, cursor colon pointer, font-size colon 16px, button hover background colon 2563EB semicolon