* { font-family: Arial, sans-serif; box-sizing: border-box; } button{ width: 100%; font-size: 2em; } input, button, select{ width: 100%; font-size: 2em; } table { border: 1px; border-collapse: collapse; } td,th { border: 1px solid black; } .time { font-size: 12px; font-weight: bold; } .message { font-style: italic; font-size: 14px; }