:root {
  --default-font: "Roboto",  system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --heading-font: "Raleway",  sans-serif;
  --nav-font: "Inter",  sans-serif;
}
:root { 
  --background-color: #ffffff;
  --default-color: #444444;
  --heading-color: #273d4e;
  --accent-color: #ff2e63ff;
  --contrast-color: #ffffff;
  --telegram-color: #24A1DE;
  --skype-color: #00AFF0;
}

.light-background {
  --background-color: #f1f4fa;
  --surface-color: #ffffff;
}

.dark-background {
  --background-color: #000910;
  --default-color: #ffffff;
  --heading-color: #ffffff;
  --surface-color: #28323a;
  --contrast-color: #ffffff;
}

:root {
  scroll-behavior: smooth;
}

body {
  color: var(--default-color);
  background-color: var(--background-color);
  font-family: var(--default-font);
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.3s;
}

a:hover {
  color: color-mix(in srgb, var(--accent-color), transparent 25%);
  text-decoration: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--heading-color);
  font-family: var(--heading-font);
}

#preloader {
  position: fixed;
  inset: 0;
  z-index: 999999;
  overflow: hidden;
  background: var(--background-color);
  transition: all 0.6s ease-out;
}

#preloader:before {
  content: "";
  position: fixed;
  top: calc(50% - 30px);
  left: calc(50% - 30px);
  border: 6px solid #ffffff;
  border-color: var(--accent-color) transparent var(--accent-color) transparent;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  animation: animate-preloader 1.5s linear infinite;
}

@keyframes animate-preloader {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 99999;
  background-color: var(--accent-color);
  width: 40px;
  height: 40px;
  border-radius: 4px;
  transition: all 0.4s;
}

.scroll-top i {
  font-size: 24px;
  color: var(--contrast-color);
  line-height: 0;
}

.scroll-top:hover {
  background-color: color-mix(in srgb, var(--accent-color), transparent 20%);
  color: var(--contrast-color);
}

.scroll-top.active {
  visibility: visible;
  opacity: 1;
}

@media screen and (max-width: 768px) {
  [data-aos-delay] {
    transition-delay: 0 !important;
  }
}

.hero {
  width: 100%;
  min-height: 100vh;
  position: relative;
  padding: 80px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero .hero-bg {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

.hero:before {
  content: "";
  background: color-mix(in srgb, var(--background-color), transparent 30%);
  position: absolute;
  inset: 0;
  z-index: 2;
}

.hero .container {
  position: relative;
  z-index: 3;
}

.hero p {
  color: color-mix(in srgb, var(--default-color), transparent 20%);
  margin: 10px 0 0 0;
  font-size: 24px;
}

.hero .btn-telegram {
  background: var(--accent-color);
  color: var(--contrast-color);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 10px 30px;
  border-radius: 4px;
  transition: 0.3s;
  text-transform: uppercase;
}

.hero .btn-telegram:hover {
  background: color-mix(in srgb, var(--telegram-color), transparent 20%);
}

.hero .btn-skype {
  background: var(--accent-color);
  color: var(--contrast-color);
  font-weight: 400;
  font-size: 14px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 10px 30px;
  border-radius: 4px;
  transition: 0.3s;
  text-transform: uppercase;
}

.hero .btn-skype:hover {
  background: color-mix(in srgb, var(--skype-color), transparent 20%);
}