:root {
  --bg-gradient: radial-gradient(circle at 50% 30%, #ffffff 0%, #edf2fb 60%, #e2eafc 100%);
  --text-dark: #080909;
  --primary-font: 'DM Sans', 'Prompt', sans-serif;
  --display-font: 'Epilogue', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-gradient);
  color: var(--text-dark);
  font-family: var(--primary-font);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Header */
.top-nav {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  padding: 28px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-text {
  font-family: var(--display-font);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-dark);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  color: #4b5563;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text-dark);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(209, 213, 219, 0.8);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(8px);
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: #9ca3af;
  font-weight: 700;
  padding: 0 2px;
}

.lang-btn.active {
  color: var(--text-dark);
}

.divider {
  color: #d1d5db;
}

/* Stage */
.hero-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding-top: 48px;
}

.owl-wrapper {
  position: relative;
  width: min(620px, 48vw);
  max-width: 90vw;
  max-height: 58vh;
  user-select: none;
}

.owl-body {
  width: 100%;
  height: auto;
  display: block;
  pointer-events: none;
  position: relative;
  z-index: 20;
}

/* Eye Tracking Sockets & Pupils */
.eye-socket {
  position: absolute;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  top: 38%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 10;
  background: #ffffff;
}

.eye-socket.left {
  left: 42.5%;
}

.eye-socket.right {
  left: 58.5%;
}

.pupil {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #4a2810 0%, #1a0f07 60%, #000000 100%);
  position: relative;
  will-change: transform;
  box-shadow: inset 0 0 4px rgba(0,0,0,0.8);
}

/* ประกายตาสีขาว */
.pupil::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 10px;
  width: 10px;
  height: 10px;
  background: #ffffff;
  border-radius: 50%;
}

.pupil::before {
  content: '';
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
}

/* CTA Button */
.cta-container {
  margin-top: 24px;
  margin-bottom: 20px;
  z-index: 30;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #080909;
  color: #ffffff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  padding: 16px 36px;
  border-radius: 99px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  background: #1e1f24;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.16);
}

@media (max-width: 600px) {
  .top-nav {
    padding: 20px 24px;
  }
  .brand-text {
    font-size: 20px;
  }
  .owl-wrapper {
    width: min(360px, 85vw);
  }
  .eye-socket {
    width: 44px;
    height: 44px;
  }
  .pupil {
    width: 32px;
    height: 32px;
  }
  .cta-container {
    margin-top: 20px;
  }
  .btn-primary {
    padding: 14px 28px;
    font-size: 15px;
  }
}