.bcksp-btn {
    display: inline-flex;
    margin: 10px;
    text-decoration: none;
    border: 2px solid #5f6265;
	border-radius: 5px;
    position: relative;
    overflow: hidden;
    font-size: 40px;
    line-height: 40px;
    padding: 12px 30px;
    color: #FFF;
    font-weight: bold;
    text-transform: uppercase; 
    font-family: 'Roboto', Тahoma, sans-serif;
    background: #35383a;
    transition: box-shadow 0.3s, transform 0.3s;
    cursor: pointer;
}
.bcksp-btn:hover,
.bcksp-btn:active,
.bcksp-btn:focus {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.4), 0 16px 20px rgba(0,0,0,0.4);
    color: #FFF;
}
.bcksp-btn:before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(-45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.7s;
}
.bcksp-btn:hover:before,
.bcksp-btn:active:before,
.bcksp-btn:focus:before {
    left: 100%;
}

.section_bcksp {
  /*transition: all 0.4s;*/
  position: relative;
  height: 100%;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  text-align: center;
  flex: 1;
  background-repeat: no-repeat; 
  background-size: cover;
  background-position: center;
}

h1 .bcksp_uv {
	color: rgba(0, 0, 0, 0.5);
}

.section_bcksp > .cont_title1 {
	margin-top: 1vh;
	/*color: rgba(0, 0, 0, 0.5);*/
	background: rgba(10,10,10,0.5);
	height: 50px;
}

.section_bcksp > .cont_title1 h1 {
  font-size: 5vw;
  color: rgba(0, 0, 0, 0);
  transition: font-size 0.4s;
}

.section_bcksp > .cont_title1 h3 {
  font-size: 2.3vw;
  color: rgba(0, 0, 0, 0.5);
  transition: all 0.4s;
}

.section_bcksp > .cont_desc {
  opacity: 1;
  transition-delay: 0.5s;
  transition: opacity 0.8s; 
}

.section_bcksp:nth-child(1) {
  background-image: url("http://decorator-int.ru/images/special/1.jpg");
  filter: brightness(22%);
}

.section_bcksp:nth-child(2) {
  background-image: url("http://decorator-int.ru/images/special/2.jpg");
  filter: brightness(22%);
}

.section_bcksp:nth-child(3) {
  background-image: url("http://decorator-int.ru/images/special/3.jpg");
  filter: brightness(100%);
 }

.section_bcksp:nth-child(4) {
  background-image: url("http://decorator-int.ru/images/special/4.jpg");
  filter: brightness(22%);
}

.section_bcksp:nth-child(5) {
  background-image: url("http://decorator-int.ru/images/special/5.jpg");
  filter: brightness(22%);
}

.form-container {
max-width: 600px;
margin: 10vh auto;
background-color:rgba(0,0,0,0.5);
padding: 20px;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0,0,0,0.1);
font-family: 'Roboto Condensed', sans-serif;
color: white;
}
.form-group {
margin-bottom: 15px;
}
label {
display: block;
margin-bottom: 5px;
font-weight: bold;
}
input, textarea {
width: 100%;
padding: 8px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
}
button {
background: #4CAF50;
color: white;
padding: 10px 15px;
border: none;
border-radius: 4px;
cursor: pointer;
}
button:hover {
background: #45a049;
}
.error {
color: red;
font-size: 12px;
margin-top: 5px;
}