/* ===== BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: auto; }
body { font-family: 'Manrope', sans-serif; background: #131313; color: #e5e2e1; overflow-x: hidden; }
h1,h2,h3,h4,h5,h6,.font-headline { font-family: 'Noto Serif', serif; }
.material-symbols-outlined { font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24; }
::-webkit-scrollbar { display: none; }
* { -ms-overflow-style: none; scrollbar-width: none; }

/* ===== LOADER ===== */
.loader {
  position: fixed; inset: 0; z-index: 9999;
  background: #0e0e0e;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-inner { text-align: center; }
.loader-brand {
  font-family: 'Noto Serif', serif;
  font-size: 1.5rem; letter-spacing: 0.2em; color: #e9c176;
  margin-bottom: 2rem; text-transform: uppercase;
}
.loader-bar-track {
  width: 200px; height: 2px; background: #4e4639;
  margin: 0 auto 1rem; border-radius: 2px; overflow: hidden;
}
.loader-bar-fill {
  height: 100%; width: 0%; background: #e9c176;
  transition: width 0.15s ease;
}
.loader-text {
  font-family: 'Manrope', sans-serif;
  font-size: 0.7rem; letter-spacing: 0.15em;
  color: #d1c5b4; text-transform: uppercase;
}

/* ===== SEQUENCE SECTION ===== */
#sequence-wrapper {
  position: relative;
  height: 400vh; /* 300vh for animation + 100vh for the pinned view */
}
#sequence-canvas {
  position: sticky;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  display: block;
  background: #131313;
}

/* ===== CALLISTO GLASSMORPHISM BUTTON ===== */
.callisto-glass-btn {
  position: fixed;
  bottom: 24px;
  right: 19px;
  z-index: 10;
  padding: 10px 28px;
  font-family: 'Noto Serif', serif;
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: #e9c176;
  background: rgba(233, 193, 118, 0.08);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(233, 193, 118, 0.2);
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3),
              inset 0 0 20px rgba(233, 193, 118, 0.04);
  transition: all 0.4s ease;
  opacity: 1;
}
.callisto-glass-btn.hidden-btn {
  opacity: 0;
  pointer-events: none;
}
.callisto-glass-btn:hover {
  background: rgba(233, 193, 118, 0.15);
  border-color: rgba(233, 193, 118, 0.4);
  box-shadow: 0 8px 40px rgba(233, 193, 118, 0.15),
              inset 0 0 30px rgba(233, 193, 118, 0.06);
  transform: translateY(-2px);
}

/* ===== PRODUCT SECTION ===== */
#product-section {
  position: relative;
  background: #131313;
  min-height: 100vh;
}

/* ===== PRODUCT CARD ANIMATIONS ===== */
.product-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
.product-card:nth-child(1) { transition-delay: 0s; }
.product-card:nth-child(2) { transition-delay: 0.1s; }
.product-card:nth-child(3) { transition-delay: 0.2s; }
.product-card:nth-child(4) { transition-delay: 0.3s; }
.product-card:nth-child(5) { transition-delay: 0.4s; }

/* Hover interactions */
.product-card article, article.product-card {
  transition: transform 0.4s ease;
}
article.product-card:hover {
  transform: translateY(-4px);
}
article.product-card:hover img {
  opacity: 1 !important;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .loader-brand { font-size: 1.1rem; }
  .loader-bar-track { width: 150px; }
  #sequence-wrapper { height: 350vh; }
}