* {
  box-sizing: border-box;
}

html, body {
  min-height: 100%;
  width: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  line-height: 1.5;
  color: #ffffff;
  background-image: url("../images/bg.JPG");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  min-height: 100vh;
}

body.dark-mode {
  color: #e6e6e6;
  background-color: #0f172a;
  background-image: none;
}

body.dark-mode main,
body.dark-mode section,
body.dark-mode footer {
  background-color: rgba(10, 25, 45, 0.8);
}

body::before {
  content: "";
  display: block;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

body > * {
  position: relative;
  z-index: 1;
}

main, section {
  margin: 12px auto;
  width: min(100%, 900px);
  padding: 16px;
  background-color: rgba(0, 0, 0, 0.55);
  border-radius: 10px;
}

h1, h2, h3, h4, h5 {
  margin-top: 1.1em;
}

h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
}

h2 { font-size: clamp(1.4rem, 3vw, 2rem); }

h3 { font-size: clamp(1.2rem, 2.3vw, 1.7rem); }

p, li {
  font-size: clamp(1rem, 2vw, 1.1rem);
  margin: 0.8em 0;
}

ul {
  list-style: inside disc;
  padding-left: 0;
  margin: 0.6em 0 1.2em;
}

.language-switcher {
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.language-switcher button {
  padding: 0.4rem 0.8rem;
  border: 2px solid #ffffff;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.7);
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
}

.language-switcher button.active,
.language-switcher button:hover {
  background-color: rgba(255, 255, 255, 0.22);
}

.hidden {
  display: none !important;
}

header nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  position: relative;
}

header nav ul {
  display: flex;
  gap: 0.8rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

header nav ul li a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
}

.hamburger {
  display: none;
  background: transparent;
  border: 1px solid #ffffff;
  color: #ffffff;
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

header nav.open ul {
  display: block;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.75);
  padding: 0.8rem 0;
}

header nav.open ul li {
  padding: 0.3rem 1rem;
}

@media (max-width: 768px) {
  header nav ul {
    display: none;
    flex-direction: column;
  }

  .hamburger {
    display: block;
  }
}

.link-button {
  display: block;
  margin: 0.4em 0;
}

.link-button a {
  display: inline-block;
  text-decoration: none;
  border: 2px solid #ffffff;
  border-radius: 999px;
  color: #ffffff;
  background-color: rgba(0, 0, 0, 0.4);
  padding: 0.55em 0.95em;
  font-weight: 600;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  width: 100%;
  max-width: 300px;
  text-align: center;
}

.link-button a:hover {
  background-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}

img {
  display: block;
  width: min(100%, 220px);
  max-width: 220px;
  height: auto;
  border-radius: 8px;
  margin: 12px 0;
}

@media (max-width: 768px) {
  body {
    background-attachment: scroll;
  }

  main, section {
    width: min(100%, 95vw);
    padding: 14px;
    margin: 10px auto;
  }

  .link-button a {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }

  section {
    padding: 12px;
  }

  .link-button a {
    padding: 0.6em 0.9em;
    font-size: 0.98rem;
  }
}