/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  overflow-x: hidden;
  position: relative;
}
body {
  font-family: Arial, sans-serif;
  background-color: #121212;
  color: #e0e0e0;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(
      circle at 0 0,
      rgba(255, 255, 255, 0.15) 1.5px,
      transparent 1.5px
    ),
    radial-gradient(
      circle at 25px 25px,
      rgba(255, 255, 255, 0.1) 1.5px,
      transparent 1.5px
    );
  background-size: 40px 40px;
  animation: drift 20s linear infinite;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: "";
  position: fixed;
  top: -20vh;
  left: -15vw;
  width: 130vw;
  height: 70vh;
  background: radial-gradient(
      circle at 15% 30%,
      rgba(88, 42, 255, 0.08),
      transparent 60%
    ),
    radial-gradient(
      circle at 60% 10%,
      rgba(62, 16, 227, 0.1),
      transparent 65%
    ),
    radial-gradient(
      circle at 85% 45%,
      rgba(76, 9, 220, 0.05),
      transparent 60%
    );
  filter: blur(60px);
  opacity: 0.7;
  animation: auroraShift 16s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
  mix-blend-mode: screen;
}
@keyframes drift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-50px, -50px, 0);
  }
}
@keyframes auroraShift {
  0% {
    transform: translate3d(-5%, -5%, 0) scale(1);
    background-position: 0 0, 0 0, 0 0;
  }
  50% {
    transform: translate3d(5%, 2%, 0) scale(1.05);
    background-position: 8% -5%, 12% 5%, -10% 8%;
  }
  100% {
    transform: translate3d(-3%, 4%, 0) scale(1);
    background-position: 0 0, -8% -5%, 10% -6%;
  }
}
a {
  color: #90caf9;
  text-decoration: none;
}
header,
section,
footer {
  width: 90%;
  max-width: 800px;
  margin: 40px auto;
  position: relative;
  z-index: 1;
}
header h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}
header p {
  font-size: 1rem;
  color: #a0a0a0;
}
.shortcut {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 4px;
  border-radius: 10px;
  color: #90caf9;
  background: rgba(144, 202, 249, 0.08);
  font-size: 0.85rem;
  font-weight: bold;
  letter-spacing: 0.05em;
}
.shortcut span {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Hero section */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.hero-carousel {
  --hero-width: min(520px, 90vw);
  --hero-img-scale: 0.85;
  position: relative;
  width: var(--hero-width);
  height: calc(
    var(--hero-width) * var(--hero-img-scale) * var(--hero-ratio, 0.85)
  );
  margin-bottom: 40px;
  perspective: 1000px;
}
.hero-carousel img {
  position: absolute;
  top: 0;
  left: 50%;
  width: calc(var(--hero-width) * var(--hero-img-scale));
  height: calc(
    var(--hero-width) * var(--hero-img-scale) * var(--hero-ratio, 0.85)
  );
  border-radius: 16px;
  object-fit: contain;
  transform-origin: bottom center;
  transform: translateX(-50%) scale(0.8);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.65);
  transition: transform 0.8s ease, z-index 0.8s ease, opacity 0.8s ease;
  opacity: 0;
}
.hero-carousel img.center {
  z-index: 3;
  opacity: 1;
  transform: translateX(-50%) scale(1) rotate(0deg);
}
.hero-carousel img.left {
  z-index: 1;
  opacity: 0.9;
  transform: translate(-90%, 0) scale(0.9) rotate(-12deg);
}
.hero-carousel img.right {
  z-index: 1;
  opacity: 0.9;
  transform: translate(-10%, 0) scale(0.9) rotate(12deg);
}

/* Content sections */
h2 {
  font-size: 1.5rem;
  margin: 30px 0 15px;
}
p {
  margin-bottom: 15px;
}

/* FAQ accordion */
.faq-item {
  margin-bottom: 10px;
}
.faq-question {
  background: #1e1e1e;
  padding: 10px 15px;
  cursor: pointer;
  border-radius: 5px;
  border-left: 3px solid #90caf9;
}
.faq-answer {
  display: none;
  background: #2c2c2c;
  padding: 10px 15px;
  border-radius: 0 0 5px 5px;
  border-left: 3px solid #90caf9;
}

.language-switcher {
  margin: 60px auto 0;
  width: 90%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.language-switcher span {
  font-size: 0.9rem;
  color: #a0a0a0;
}
.language-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.language-switcher button {
  background: #1f1f1f;
  color: #e0e0e0;
  border: 1px solid #333;
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.language-switcher button.active,
.language-switcher button:hover {
  background: #90caf9;
  color: #0d1117;
  border-color: #90caf9;
}

/* Footer */
footer {
  margin-top: 40px;
  text-align: center;
  font-size: 0.8rem;
  color: #777;
}