<form class="form-wrapper">
  <input type="text" id="search" placeholder="Текст, который будем искать ..." required>
  <input type="submit" value="искать" id="submit">
</form>

.form-wrapper {
  width: 450px;
  padding: 8px;
  margin: 100px auto;
  overflow: hidden;
  border-width: 1px;
  border-style: solid;
  border-color: #dedede #bababa #aaa #bababa;
  -moz-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
  -webkit-box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
  box-shadow: 0 3px 3px rgba(255,255,255,.1), 0 3px 0 #bbb, 0 4px 0 #aaa, 0 5px 5px #444;
  -moz-border-radius: 10px;
  -webkit-border-radius: 10px;
  border-radius: 10px;
  background-color: #f6f6f6;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#f6f6f6), to(#eae8e8));
  background-image: -webkit-linear-gradient(top, #f6f6f6, #eae8e8);
  background-image: -moz-linear-gradient(top, #f6f6f6, #eae8e8);
  background-image: -ms-linear-gradient(top, #f6f6f6, #eae8e8);
  background-image: -o-linear-gradient(top, #f6f6f6, #eae8e8);
  background-image: linear-gradient(top, #f6f6f6, #eae8e8);
}

.form-wrapper #search {
  width: 330px;
  height: 20px;
  padding: 10px 5px;
  float: left;
  font: bold 16px 'lucida sans', 'trebuchet MS', 'Tahoma';
  border: 1px solid #ccc;
  -moz-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
  -webkit-box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
  box-shadow: 0 1px 1px #ddd inset, 0 1px 0 #fff;
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border-radius: 3px;
}

.form-wrapper #search:focus {
  outline: 0;
  border-color: #aaa;
  -moz-box-shadow: 0 1px 1px #bbb inset;
  -webkit-box-shadow: 0 1px 1px #bbb inset;
  box-shadow: 0 1px 1px #bbb inset;
}

.form-wrapper #search::-webkit-input-placeholder {
  color: #999;
  font-weight: normal;
}

.form-wrapper #search:-moz-placeholder {
  color: #999;
  font-weight: normal;
}

.form-wrapper #search:-ms-input-placeholder {
  color: #999;
  font-weight: normal;
}  

.form-wrapper #submit {
  float: right;
  border: 1px solid #00748f;
  height: 42px;
  width: 100px;
  padding: 0;
  cursor: pointer;
  font: bold 15px Arial, Helvetica;
  color: #fafafa;
  text-transform: uppercase;
  background-color: #0483a0;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#31b2c3), to(#0483a0));
  background-image: -webkit-linear-gradient(top, #31b2c3, #0483a0);
  background-image: -moz-linear-gradient(top, #31b2c3, #0483a0);
  background-image: -ms-linear-gradient(top, #31b2c3, #0483a0);
  background-image: -o-linear-gradient(top, #31b2c3, #0483a0);
  background-image: linear-gradient(top, #31b2c3, #0483a0);
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  border-radius: 3px;
  text-shadow: 0 1px 0 rgba(0, 0 ,0, .3);
  -moz-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
  -webkit-box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 0 #fff;
}

.form-wrapper #submit:hover,
.form-wrapper #submit:focus {
  background-color: #31b2c3;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#0483a0), to(#31b2c3));
  background-image: -webkit-linear-gradient(top, #0483a0, #31b2c3);
  background-image: -moz-linear-gradient(top, #0483a0, #31b2c3);
  background-image: -ms-linear-gradient(top, #0483a0, #31b2c3);
  background-image: -o-linear-gradient(top, #0483a0, #31b2c3);
  background-image: linear-gradient(top, #0483a0, #31b2c3);
}  

.form-wrapper #submit:active {
  outline: 0;
  -moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
  -webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5) inset;
}

.form-wrapper #submit::-moz-focus-inner {
  border: 0;
}