/* Base Typography and Variables */
:root {
  /* Colors */
  --c-bg: #fdfcfb;
  --c-text: #2a2a2a;
  --c-accent: #b39b82;
  --c-secondary-bg: #f4eee9;
  
  /* Typography */
  --font-serif: "Playfair Display", "Georgia", serif;
  --font-sans: "Inter", "Helvetica Neue", Helvetica, sans-serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2.5rem;
  --space-lg: 5rem;
  --space-xl: 10rem;
  
  /* Grid Layouts */
  --container-width: 1440px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background-color: var(--c-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  animation: fadeIn 1.2s ease-out forwards;
}

body.page-leave {
  opacity: 0;
  transition: opacity 0.5s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(3rem, 8vw, 6.5rem); }
h2 { font-size: clamp(2.5rem, 5vw, 4.5rem); margin-bottom: var(--space-md); }
h3 { font-size: 1.8rem; margin-bottom: var(--space-xs); }
h4 { font-size: 1.2rem; margin-bottom: var(--space-xs); font-family: var(--font-sans); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }

p {
  margin-bottom: 1rem;
  font-size: 1.1rem;
  color: #4a4a4a;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.3s ease;
}

a:hover {
  opacity: 0.7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Grid Strategy 1: Editorial Asymmetric (Index/About) */
.grid-editorial {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-lg);
  align-items: center;
}
.grid-editorial .col-left { grid-column: 1 / 7; }
.grid-editorial .col-right { grid-column: 7 / 13; }
@media (max-width: 900px) {
  .grid-editorial { display: flex; flex-direction: column; gap: var(--space-md); }
}

/* Grid Strategy 2: Modular Product Display (Products/Bundles) */
.grid-modular {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg) var(--space-md);
}

/* Grid Strategy 3: Horizontal Timeline/Steps (Routines/Ingredients) */
.grid-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
@media (min-width: 768px) {
  .grid-timeline {
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: var(--space-md);
    scrollbar-width: none;
  }
  .grid-timeline::-webkit-scrollbar {
    display: none;
  }
  .grid-timeline > * {
    flex: 0 0 70%;
    scroll-snap-align: start;
  }
}
@media (min-width: 1024px) {
  .grid-timeline > * {
    flex: 0 0 35%;
  }
}

/* Navigation */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  padding: 1.5rem var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  transition: background 0.3s, color 0.3s;
}
.site-header.dark-mode {
  color: white;
  mix-blend-mode: difference;
}
.site-header.light-mode {
  color: var(--c-text);
  background: rgba(253,252,251,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo a {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  font-weight: 500;
}

.site-nav {
  display: flex;
  gap: 2.5rem;
}
.site-nav a {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  font-weight: 500;
}
@media (max-width: 768px) {
  .site-nav { display: none; }
}

/* Footer */
.site-footer {
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  background-color: var(--c-text);
  color: var(--c-bg);
  text-align: center;
}
.site-footer h2 {
  color: var(--c-bg);
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}
.site-footer .site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-md);
}
.site-footer p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* Effects CSS */
.sheen-card {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.sheen-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.sheen-card:hover img {
  transform: scale(1.05);
}
.sheen-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 2;
}
.sheen-card:hover::after {
  opacity: 1;
}

.narrative-step {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s cubic-bezier(0.2, 0.8, 0.2, 1), transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.narrative-step.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.kinetic-title {
  transform-origin: left center;
  transition: transform 0.1s linear;
}

/* Forms & CTA */
.magnetic-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cta-button {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: var(--c-text);
  color: var(--c-bg);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  border: 1px solid var(--c-text);
  transition: all 0.4s ease;
}
.cta-button:hover {
  background: transparent;
  color: var(--c-text);
  opacity: 1;
}

.cta-button-outline {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: transparent;
  color: var(--c-text);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  border: 1px solid var(--c-text);
  transition: all 0.4s ease;
}
.cta-button-outline:hover {
  background: var(--c-text);
  color: var(--c-bg);
  opacity: 1;
}

/* Utility */
.section-padding { padding: var(--space-xl) 0; }
.text-center { text-align: center; }