圣诞节快到了，程序员应该给女友送一个线上圣诞树

html, body

{

width: 100%;

height: 100%;

margin: 0;

padding: 0;

border: 0;

}

div

{

margin: 0;

padding: 0;

border: 0;

}

.nav

{

position: absolute;

top: 0;

left: 0;

width: 100%;

height: 27px;

background-color: white; color: black;

text-align: center;

line-height: 25px;

}

a

{

color: black;

text-decoration: none;

border-bottom: 1px dashed black;

}

a:hover

{

border-bottom: 1px solid red;

}

.previous

{

float: left;

margin-left: 10px;

}

.next

{

float: right;

margin-right: 10px;

}

.green

{

color: green;

}

.red

{

color: red;

}

textarea

{

width: 100%;

height: 100%;

border: 0;

padding: 0;

margin: 0;

padding-bottom: 20px;

}

.block-outer

{

float: left;

width: 22%;

height: 100%;

padding: 5px;

border-left: 1px solid black;

margin: 30px 3px 3px 3px;

}

.block-inner

{

height: 68%;

}

.one

{

border: 0;

}