body {
  margin: 0;
  background: black;
  color: white;
  font-family: 'Poppins', sans-serif;
}

/* ===== Layout ===== */
.product-layout {
  height: 100vh;
  display: grid;
  grid-template-columns: 40% 60%;
}

/* Left side */
.product-image {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
}

/* Main image */
.main-image {
  width: 80%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 20px;
}

/* Thumbnails */
.thumbnail-row {
  display: flex;
  gap: 12px;
}

.thumbnail-row img {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 12px;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.thumbnail-row img:hover {
  opacity: 1;
  transform: scale(1.05);
}

/* Right side (unchanged) */
.product-info {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px;
}


.product-info h1 {
  font-family: 'Anton', sans-serif;
  font-size: 6rem;
  margin: 0;
}

.tagline {
  opacity: 0.7;
  margin: 20px 0 40px;
}

/* Form */
.notify-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 360px;
}

.notify-form input {
  padding: 14px;
  background: black;
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
}

.notify-form button {
  padding: 14px;
  background: white;
  color: black;
  border: none;
  font-family: 'Anton', sans-serif;
  letter-spacing: 3px;
  cursor: pointer;
}

/* ===== Glass back button ===== */
.glass-back {
  position: fixed;
  top: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  text-decoration: none;
  color: white;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;

  background: linear-gradient(180deg,
    rgba(255,255,255,0.05),
    rgba(255,255,255,0.02));
  border: 1px solid rgba(255,255,255,0.05);
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  box-shadow:
    0 6px 18px rgba(0,0,0,0.25),
    inset 0 1px 0 rgba(255,255,255,0.1);

  transition: transform 0.2s ease;
}

.glass-back:hover {
  transform: translateY(-2px) scale(1.05);
}

/* ===== Mobile ===== */
@media (max-width: 900px) {
  .product-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr; /* 50% image, 50% content */
    height: 100vh;
  }

  .product-image {
    height: 50vh;
  }

  .product-info {
    height: 50vh;
    padding: 40px 30px;
    justify-content: center;
  }

  .product-info h1 {
    font-size: 3rem;
  }
}