Tạo nút động khá độc đáo bằng CSS3

Demo

Demo

Demo

Demo

Tác giả: Martin Angelov - Nguồn: tutorialzine.com

Một thủ thuật rất hay tận dụng sức mạnh của CSS3 với hiệu ứng động và ảnh nền đa lớp.

1. Chuẩn bị: tải ảnh này, up lên các host để lấy link - sử dụng làm ảnh nền.

2. CSS:

.button{
 font:15px Calibri, Arial, sans-serif;

 /* A semi-transparent text shadow */
 text-shadow:1px 1px 0 rgba(255,255,255,0.4);
 
 /* Overriding the default underline styling of the links */
 text-decoration:none !important;
 white-space:nowrap;
 display:inline-block;
 vertical-align:baseline;
 position:relative;
 cursor:pointer;
 padding:10px 20px;
 background-repeat:no-repeat;

 /* The following two rules are fallbacks, in case
    the browser does not support multiple backgrounds. */
 background-position:bottom left;
 background-image:url('button_bg.png');
 
 /* Multiple backgrounds version. The background images
    are defined individually in color classes */
 background-position:bottom left, top right, 0 0, 0 0;
 background-clip:border-box;
 
 /* Applying a default border raidus of 8px */
 -moz-border-radius:8px;
 -webkit-border-radius:8px;
 border-radius:8px;
 
 /* A 1px highlight inside of the button */
 -moz-box-shadow:0 0 1px #fff inset;
 -webkit-box-shadow:0 0 1px #fff inset;
 box-shadow:0 0 1px #fff inset;
 
 /* Animating the background positions with CSS3 */
 /* Currently works only in Safari/Chrome */
 -webkit-transition:background-position 1s;
 -moz-transition:background-position 1s;
 transition:background-position 1s;
}

.button:hover{
 /* The first rule is a fallback, in case the browser
    does not support multiple backgrounds */
 background-position:top left;
 background-position:top left, bottom right, 0 0, 0 0;
}

.button:active{
 /* Moving the button 1px to the bottom when clicked */
 bottom:-1px;
}

/* The three buttons sizes */
.button.big  { font-size:30px;}
.button.medium { font-size:18px;}
.button.small { font-size:13px;}

/* A more rounded button */
.button.rounded{
 -moz-border-radius:4em;
 -webkit-border-radius:4em;
 border-radius:4em;
}

/* Defining four button colors */

/* BlueButton */
.blue.button{
 color:#0f4b6d !important;
 border:1px solid #84acc3 !important;
 
 /* A fallback background color */
 background-color: #48b5f2;
 
 /* Specifying a version with gradients according to */
 background-image: url('button_bg.png'), url('button_bg.png'),
      -moz-radial-gradient( center bottom, circle,
            rgba(89,208,244,1) 0,rgba(89,208,244,0) 100px),
      -moz-linear-gradient(#4fbbf7, #3faeeb);
 background-image: url('button_bg.png'), url('button_bg.png'),
      -webkit-gradient( radial, 50% 100%, 0, 50% 100%, 100,
           from(rgba(89,208,244,1)), to(rgba(89,208,244,0))),
      -webkit-gradient(linear, 0% 0%, 0% 100%, from(#4fbbf7), to(#3faeeb));
}

.blue.button:hover{
 background-color:#63c7fe;
 background-image: url('button_bg.png'), url('button_bg.png'),
      -moz-radial-gradient( center bottom, circle,
            rgba(109,217,250,1) 0,rgba(109,217,250,0) 100px),
      -moz-linear-gradient(#63c7fe, #58bef7);
 background-image: url('button_bg.png'), url('button_bg.png'),
      -webkit-gradient( radial, 50% 100%, 0, 50% 100%, 100,
           from(rgba(109,217,250,1)), to(rgba(109,217,250,0))),
      -webkit-gradient(linear, 0% 0%, 0% 100%, from(#63c7fe), to(#58bef7));
}

/* Green Button */
.green.button{
 color:#345903 !important;
 border:1px solid #96a37b !important; 
 background-color: #79be1e;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(162,211,30,1) 0,rgba(162,211,30,0) 100px),-moz-linear-gradient(#82cc27, #74b317);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(162,211,30,1)), to(rgba(162,211,30,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#82cc27), to(#74b317));
}

.green.button:hover{
 background-color:#89d228;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(183,229,45,1) 0,rgba(183,229,45,0) 100px),-moz-linear-gradient(#90de31, #7fc01e);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(183,229,45,1)), to(rgba(183,229,45,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#90de31), to(#7fc01e));
}

/* Orange Button */
.orange.button{
 color:#693e0a !important;
 border:1px solid #bea280 !important; 
 background-color: #e38d27;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(232,189,45,1) 0,rgba(232,189,45,0) 100px),-moz-linear-gradient(#f1982f, #d4821f);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(232,189,45,1)), to(rgba(232,189,45,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#f1982f), to(#d4821f));
}

.orange.button:hover{
 background-color:#ec9732;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(241,192,52,1) 0,rgba(241,192,52,0) 100px),-moz-linear-gradient(#f9a746, #e18f2b);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(241,192,52,1)), to(rgba(241,192,52,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#f9a746), to(#e18f2b));
}

.gray.button{
 color:#525252 !important;
 border:1px solid #a5a5a5 !important; 
 background-color: #a9adb1;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(197,199,202,1) 0,rgba(197,199,202,0) 100px),-moz-linear-gradient(#c5c7ca, #92989c);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(197,199,202,1)), to(rgba(197,199,202,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#c5c7ca), to(#92989c));
}

.gray.button:hover{
 background-color:#b6bbc0;
 background-image:url('button_bg.png'), url('button_bg.png'), -moz-radial-gradient(center bottom, circle, rgba(202,205,208,1) 0,rgba(202,205,208,0) 100px),-moz-linear-gradient(#d1d3d6, #9fa5a9);
 background-image:url('button_bg.png'), url('button_bg.png'), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(202,205,208,1)), to(rgba(202,205,208,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#d1d3d6), to(#9fa5a9));
}

→ Thay thế toàn bộ link 'button_bg.png' bằng link ảnh ở bước 1.

3. Sử dụng: tại nơi cần đặt nút, chèn đoạn HTML sau, tùy chỉnh cho thích hợp - với các tùy chọn:

- Kích cỡ: small, medium, big.
- Màu: blue, green, orange, gray.
- Bo tròn: rounded.

<a href="#" class="button blue big">Text</a>
<a href="#" class="button blue medium">Text</a>
<a href="#" class="button small blue rounded">Text</a>

4. Xong!