/* ═══════════════════════════════════════════════════════════════
   ERAYA — Luxury Skincare Website
   Design System & Component Styles
   ═══════════════════════════════════════════════════════════════ */

/* ── Custom Properties ──────────────────────────────────────── */
:root {
  /* Palette */
  --c-white:        #FAFAF8;
  --c-cream:        #F2EBE0;
  --c-warm-grey:    #E4DDD4;
  --c-mist:         #C8BFB3;
  --c-gold:         #C9A96E;
  --c-gold-light:   #DFC08E;
  --c-gold-dim:     #A88748;
  --c-charcoal:     #181512;
  --c-smoke:        #2E2A25;
  --c-slate:        #4A4440;

  /* Typography */
  --f-serif:  'Cormorant Garamond', 'Playfair Display', Georgia, serif;
  --f-sans:   'Jost', 'DM Sans', system-ui, sans-serif;

  /* Easing */
  --ease-silk:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-luxury:  cubic-bezier(0.4, 0, 0.2, 1);
  --ease-reveal:  cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--c-white);
  color: var(--c-charcoal);
  font-family: var(--f-sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }

/* ════════════════════════════════════════════════════════════════
   LOADING SCREEN
════════════════════════════════════════════════════════════════ */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 1s var(--ease-silk), visibility 1s;
}

.loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.75rem;
  opacity: 0;
  animation: fadeRise 0.9s var(--ease-silk) 0.15s forwards;
}

.loading-logo {
  font-family: var(--f-serif);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 300;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  color: var(--c-charcoal);
}

.loading-rule {
  width: 40px;
  height: 1px;
  background: var(--c-gold);
  opacity: 0.6;
}

.loading-bar-track {
  width: 200px;
  height: 1px;
  background: var(--c-warm-grey);
  position: relative;
  overflow: hidden;
}

.loading-bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  background: linear-gradient(90deg, var(--c-gold-dim), var(--c-gold-light));
  transition: width 0.25s var(--ease-luxury);
}

.loading-subtitle {
  font-family: var(--f-sans);
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-slate);
  opacity: 0.55;
}

/* ════════════════════════════════════════════════════════════════
   NAVIGATION
════════════════════════════════════════════════════════════════ */
/* ════════════════════════════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════════════════════════════ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem 4vw;
  background: rgba(12, 10, 8, 0.65);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.4s var(--ease-luxury), padding 0.4s var(--ease-luxury);
  pointer-events: auto;
}

.site-nav.is-dark {
  padding: 1.15rem 4vw;
  background: rgba(12, 10, 8, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-wordmark {
  pointer-events: all;
  font-family: var(--f-serif);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.45em;
  text-indent: 0.45em;
  color: var(--c-white);
  transition: color 0.4s var(--ease-silk);
}

.nav-wordmark:hover {
  color: var(--c-gold-light);
}

.nav-links {
  pointer-events: all;
  display: flex;
  gap: 2.5rem;
  opacity: 0;
  animation: fadeIn 0.8s var(--ease-silk) 0.5s forwards;
}

.nav-link {
  font-family: var(--f-sans);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(250, 250, 248, 0.72);
  position: relative;
  transition: color 0.3s;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-gold);
  transition: width 0.35s var(--ease-silk);
}

.nav-link:hover::after { width: 100%; }
.nav-link:hover { color: var(--c-white); }

.nav-cta {
  pointer-events: all;
  font-family: var(--f-sans);
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-white);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.6rem 1.4rem;
  transition: background 0.3s var(--ease-silk), border-color 0.3s var(--ease-silk), color 0.3s var(--ease-silk);
  opacity: 0;
  animation: fadeIn 0.8s var(--ease-silk) 0.6s forwards;
}

.nav-cta:hover {
  background: var(--c-white);
  border-color: var(--c-white);
  color: var(--c-charcoal);
}

/* ════════════════════════════════════════════════════════════════
   HERO — Scroll Container & Sticky Stage
════════════════════════════════════════════════════════════════ */
.hero-scroll-container {
  position: relative;
  height: 520vh;
}

.hero-sticky {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: var(--c-white);
}

/* Frame canvas — base layer, fills the sticky stage.
   (Missing in source CSS — canvas had no positioning/sizing rules,
   so it rendered as an inline element instead of a fullscreen stage.) */
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

/* Atmosphere overlay — darkens the scene as the user scrolls.
   Opacity is driven entirely by hero.js (updateScene). */
.atmosphere-overlay {
  position: absolute;
  inset: 0;
  background: var(--c-charcoal);
  opacity: 0;
  pointer-events: none;
  z-index: 5;
}

/* Vignette — always-on subtle edge darkening */
.vignette-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.55) 100%);
  pointer-events: none;
  z-index: 6;
}

/* ════════════════════════════════════════════════════════════════
   SCROLL PROMPT
   ════════════════════════════════════════════════════════════════ */
.scroll-prompt {
  position: absolute;
  left: 50%;
  bottom: 2.75rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  z-index: 11;
  opacity: 1;
  transition: opacity 0.5s var(--ease-silk);
  pointer-events: none;
}

.scroll-prompt.is-hidden {
  opacity: 0;
}

.scroll-line-anim {
  width: 1px;
  height: 28px;
  background: rgba(250, 250, 248, 0.65);
  transform-origin: top center;
  animation: scrollBeat 1.6s ease-in-out infinite;
}

.scroll-text {
  font-family: var(--f-sans);
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(250, 250, 248, 0.8);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.7);
}

/* ════════════════════════════════════════════════════════════════
   DISCOVER ERAYA BRAND CARD
   ════════════════════════════════════════════════════════════════ */
.brand-card-ui {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 8vw;
  opacity: 1;
  transform: translateY(-50%);
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  /* Vertical column shadow overlay on the left side */
  background: linear-gradient(to right, rgba(12, 10, 8, 0.72) 0%, rgba(12, 10, 8, 0.45) 25%, rgba(12, 10, 8, 0.12) 45%, transparent 75%);
  z-index: 10;
}

.brand-card-content {
  pointer-events: all;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2rem;
  max-width: 480px;
}

.brand-card-title {
  font-family: var(--f-serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  letter-spacing: 0.28em;
  color: var(--c-white);
  line-height: 1.15;
  text-shadow: 
    0 2px 10px rgba(0, 0, 0, 0.9), 
    0 10px 30px rgba(0, 0, 0, 0.7), 
    0 20px 60px rgba(0, 0, 0, 0.5);
}

.brand-card-btn {
  pointer-events: all;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.45rem;
  cursor: pointer;
  margin-left: 0.2rem;
}

.brand-card-btn-text {
  font-family: var(--f-sans);
  font-size: clamp(0.75rem, 1.5vw, 0.85rem);
  font-weight: 400;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-white);
  transition: color 0.4s var(--ease-silk);
  white-space: nowrap;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.brand-card-btn-underline {
  display: block;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-gold-dim), var(--c-gold-light));
  transition: width 0.55s var(--ease-silk);
}

/* ════════════════════════════════════════════════════════════════
   KEYFRAMES
   ════════════════════════════════════════════════════════════════ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeRise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scrollBeat {
  0%, 100% { transform: scaleY(0.7); opacity: 0.35; }
  50%       { transform: scaleY(1);   opacity: 1; }
}

/* ════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .brand-card-ui {
    justify-content: center;
    padding: 0 4vw;
  }

  .brand-card-content {
    align-items: center;
    text-align: center;
    padding: 2.5rem 2rem;
  }

  .brand-card-btn {
    align-self: center;
    align-items: center;
  }

  .brand-card-btn-underline {
    align-self: center;
  }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .site-nav { padding: 1.25rem 5vw; }
  .scroll-prompt { display: none; }
}

/* ── High-DPI refinements ───────────────────────────────────── */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .loading-bar-track {
    transform: scaleY(0.5);
  }
}

/* ── Reduced Motion ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}