Characters for creating borders.
A practical tool to find the codes of the framing characters: copy and paste the characters directly from this page or click to display their UTF code. Here are the styles we used to achieve the renders below:
font-family:monospace;
line-height:1;
white-space:pre;
/* And incidentally : */
font-size:2rem;
font-weight:bold;
Fine border
┌───┬───┐
│ │ │
├───┼───┤
│ │ │
└───┴───┘
Thick border(1)
┏┳┓
┃┃┃
┣╋┫
┃┃┃
┗┻┛
Double border
╔═══╦═══╗
║ ║ ║
╠═══╬═══╣
║ ║ ║
╚═══╩═══╝
Mixed border
╒═══╤═══╕
│ │ │
╞═══╪═══╡
│ │ │
╘═══╧═══╛
Mixed border
╓───╥───╖
║ ║ ║
╟───╫───╢
║ ║ ║
╙───╨───╜
(1) The thick horizontal line (━) seems to pose a problem of width, and causes a shift of the frames.
Rounded edges
╭━━━╮ ╭╮ ╭╮
╰━━━╯ ┃┃ ╎╎
╭┄┄┄╮ ┃┃ ╎╎
╰┄┄┄╯ ┃┃ ╎╎
╭┈┈┈╮ ┃┃ ╎╎
╰┈┈┈╯ ╰╯ ╰╯
Diagonals
╱╳╲
╲╳╱