body {
  margin: 0;
  font-family: 'Arial', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f4f4f4;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

button {
  cursor: pointer;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.site-header {
  background-color: #0A2342;
  color: #fff;
  padding: 15px 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.site-header .logo {
  font-size: 2.2em;
  font-weight: bold;
  color: #FFD700;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
  background: linear-gradient(45deg, #FFD700, #FFA500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  position: relative;
  padding-bottom: 5px;
}

.site-header .logo::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: #FFD700;
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s ease-out;
}

.site-header .logo:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav .nav-links {
  display: flex;
  margin-right: 20px;
}

.main-nav .nav-links li {
  margin: 0 15px;
}

.main-nav .nav-links a {
  color: #fff;
  font-weight: 600;
  padding: 5px 0;
  position: relative;
  transition: color 0.3s ease;
}

.main-nav .nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: #FFD700;
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s ease-out;
}

.main-nav .nav-links a:hover,
.main-nav .nav-links a.active-nav-link {
  color: #FFD700;
}

.main-nav .nav-links a:hover::after,
.main-nav .nav-links a.active-nav-link::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.auth-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.auth-buttons .btn {
  margin-left: 0;
}

.btn-login {
  background-color: transparent;
  color: #FFD700;
  border: 2px solid #FFD700;
}

.btn-login:hover {
  background-color: #FFD700;
  color: #0A2342;
}

.btn-register {
  background-color: #FFD700;
  color: #0A2342;
}

.btn-register:hover {
  background-color: #e6c200;
}

.hamburger-menu {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 10px;
}

.hamburger-menu .bar {
  width: 25px;
  height: 3px;
  background-color: #fff;
  margin: 4px 0;
  transition: 0.4s;
}

.site-footer {
  background-color: #0A2342;
  color: #fff;
  padding: 40px 0 20px;
  font-size: 0.9em;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  padding: 0 20px;
}

.footer-col {
  padding: 10px 0;
}

.footer-col h3 {
  color: #FFD700;
  font-size: 1.2em;
  margin-bottom: 15px;
  border-bottom: 2px solid #FFD700;
  padding-bottom: 5px;
  display: inline-block;
}

.footer-col p, .footer-col li {
  margin-bottom: 8px;
  color: #ccc;
}

.footer-col a {
  color: #ccc;
  transition: color 0.3s ease;
}

.footer-col a:hover,
.footer-col a.active-nav-link {
  color: #FFD700;
}

.footer-logo {
  font-size: 1.8em;
  font-weight: bold;
  color: #FFD700;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 15px;
}

.footer-bottom {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #aaa;
}

.scroll-to-top {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #FFD700;
  color: #0A2342;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 1.5em;
  line-height: 50px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  cursor: pointer;
  z-index: 999;
  transition: background-color 0.3s ease;
}

.scroll-to-top:hover {
  background-color: #e6c200;
}

@media (max-width: 1024px) {
  .main-nav .nav-links li {
    margin: 0 10px;
  }
}

@media (max-width: 768px) {
  .header-container {
    padding: 0 15px;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    grid-template-areas:
      "hamburger logo"
      "buttons buttons";
    align-items: center;
    gap: 15px 0;
  }

  .hamburger-menu {
    display: flex;
    grid-area: hamburger;
    order: 1;
    justify-self: start;
  }

  .hamburger-menu.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .hamburger-menu.active .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger-menu.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-header .logo {
    grid-area: logo;
    order: 2;
    justify-self: center;
    text-align: center;
  }

  .auth-buttons {
    grid-area: buttons;
    order: 3;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 15px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 0;
  }

  .auth-buttons .btn {
    margin: 0;
    flex-shrink: 0;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: #0A2342;
    flex-direction: column;
    align-items: flex-start;
    transform: translateY(-150%);
    transition: transform 0.3s ease-in-out;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    padding-bottom: 20px;
    z-index: 999;
  }

  .main-nav.active {
    transform: translateY(0);
  }

  .main-nav .nav-links {
    flex-direction: column;
    width: 100%;
    margin-right: 0;
    text-align: center;
  }

  .main-nav .nav-links li {
    margin: 10px 0;
    width: 100%;
  }

  .main-nav .nav-links a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .main-nav .nav-links a::after {
    display: none;
  }

  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .header-container .logo {
    font-size: 1.8em;
  }

  .footer-container {
    grid-template-columns: 1fr;
  }

  .footer-col {
    text-align: center;
  }

  .footer-col h3 {
    width: fit-content;
    margin: 0 auto 15px;
  }

  .footer-logo {
    font-size: 1.5em;
    margin: 0 auto 15px;
  }
}