/* ==========================================================================
   SWAAMI NARAYANAN E-TEMPLE — PHASE 01: HEADER & HERO SECTION
   Architectural Design System, Editorial Typography & Motion Logic
   ========================================================================== */

/* --- Core Tokens --- */
:root {
  --color-obsidian: #0A0806;
  --color-dark-panel: #0E0C0A;
  --color-glass-header: rgba(14, 12, 10, 0.92);
  --color-ivory: #FDFBF7;
  --color-ivory-muted: rgba(253, 251, 247, 0.85);
  --color-gold: #D4AF37;
  --color-gold-light: #F7E096;
  --color-gold-dark: #AA7C11;
  --color-gold-glow: rgba(212, 175, 55, 0.25);
  
  --font-heading: 'Cinzel', 'Times New Roman', serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.25s ease-out;
}

/* --- Base Resets & Typography Imports --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-obsidian);
  color: var(--color-ivory);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   1. DESKTOP & MOBILE HEADER
   ========================================================================== */

.snt-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 96px;
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--transition-smooth);
  background: transparent;
  border-bottom: 1px solid rgba(212, 175, 55, 0.08);
}

.snt-header.is-scrolled {
  height: 76px;
  background: var(--color-glass-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.6), 0 1px 0 rgba(212, 175, 55, 0.2);
  border-bottom-color: rgba(212, 175, 55, 0.15);
}

.snt-header__container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 40px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Logo */
.snt-header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--transition-fast);
}

.snt-header__logo img {
  height: 48px;
  width: auto;
  display: block;
  transition: var(--transition-smooth);
}

.snt-header.is-scrolled .snt-header__logo img {
  height: 42px;
}

/* Desktop Navigation */
.snt-header__nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.snt-header__link {
  position: relative;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: var(--color-ivory);
  text-decoration: none;
  padding: 8px 0;
  transition: var(--transition-fast);
}

.snt-header__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold));
  border-radius: 2px;
  transition: all 0.3s ease-out;
  transform: translateX(-50%);
  opacity: 0;
}

.snt-header__link:hover,
.snt-header__link.is-active {
  color: var(--color-gold-light);
}

.snt-header__link:hover::after,
.snt-header__link.is-active::after {
  width: 100%;
  opacity: 1;
}

/* Primary Header CTA Button */
.snt-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-obsidian);
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 50%, var(--color-gold-dark) 100%);
  padding: 13px 28px;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 4px 20px var(--color-gold-glow);
  transition: var(--transition-smooth);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.snt-btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.6s ease;
}

.snt-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212, 175, 55, 0.4);
}

.snt-btn-primary:hover::before {
  left: 100%;
}

.snt-btn-primary svg {
  width: 14px;
  height: 14px;
  transition: transform 0.3s ease;
}

.snt-btn-primary:hover svg {
  transform: translateX(3px);
}

/* Secondary Ghost CTA Button */
.snt-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-ivory);
  background: rgba(253, 251, 247, 0.05);
  padding: 13px 28px;
  border-radius: 50px;
  text-decoration: none;
  border: 1px solid rgba(253, 251, 247, 0.3);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.snt-btn-secondary:hover {
  color: var(--color-gold-light);
  border-color: var(--color-gold);
  background: rgba(212, 175, 55, 0.1);
  transform: translateY(-2px);
}

/* Mobile Hamburger Button */
.snt-header__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 6px;
  z-index: 1002;
}

.snt-header__toggle-bar {
  width: 26px;
  height: 2px;
  background-color: var(--color-ivory);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.snt-header__toggle.is-open .snt-header__toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
  background-color: var(--color-gold);
}

.snt-header__toggle.is-open .snt-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.snt-header__toggle.is-open .snt-header__toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
  background-color: var(--color-gold);
}

/* Mobile Drawer Overlay */
.snt-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.snt-drawer-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.snt-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  background: var(--color-dark-panel);
  border-left: 1px solid rgba(212, 175, 55, 0.2);
  z-index: 1001;
  padding: 100px 36px 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.snt-drawer.is-open {
  transform: translateX(0);
}

.snt-drawer__nav {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.snt-drawer__link {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--color-ivory);
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.snt-drawer__link:hover,
.snt-drawer__link.is-active {
  color: var(--color-gold);
  padding-left: 8px;
}


/* ==========================================================================
   2. HERO SECTION COMPOSITION
   ========================================================================== */

.snt-hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 700px;
  max-height: 1080px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-obsidian);
}

/* Background Slide Gallery */
.snt-hero__gallery {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.snt-hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1), visibility 1.2s;
}

.snt-hero__slide.is-active {
  opacity: 1;
  visibility: visible;
}

.snt-hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transform: scale(1.06);
  transition: transform 8s ease-out;
}

.snt-hero__slide.is-active .snt-hero__image {
  transform: scale(1.0);
}

/* Intelligent Cinematic Scrim Gradient Overlay */
.snt-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: 
    linear-gradient(90deg, 
      rgba(10, 8, 6, 0.92) 0%, 
      rgba(10, 8, 6, 0.75) 45%, 
      rgba(10, 8, 6, 0.25) 85%, 
      rgba(10, 8, 6, 0.1) 100%),
    linear-gradient(0deg, 
      rgba(10, 8, 6, 0.8) 0%, 
      transparent 35%);
  pointer-events: none;
}

/* Hero Content Column */
.snt-hero__container {
  position: relative;
  z-index: 3;
  max-width: 1440px;
  margin: 0 auto;
  padding: 120px 40px 60px;
  width: 100%;
}

.snt-hero__content {
  max-width: 680px;
  text-align: left;
}

/* Eyebrow Label */
.snt-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--color-gold-light);
  margin-bottom: 20px;
}

.snt-hero__eyebrow-line {
  width: 32px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold-light), transparent);
}

/* Main Display Heading */
.snt-hero__heading {
  font-family: var(--font-heading);
  font-size: clamp(42px, 5.5vw, 72px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.5px;
  color: var(--color-ivory);
  margin-bottom: 24px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.7);
}

.snt-hero__heading span {
  background: linear-gradient(135deg, var(--color-ivory) 40%, var(--color-gold-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Supporting Body Text */
.snt-hero__text {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.25vw, 19px);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-ivory-muted);
  margin-bottom: 38px;
  max-width: 590px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.6);
}

/* CTA Group */
.snt-hero__ctas {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

/* Sacred Ornamental Line Detail */
.snt-hero__divider {
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0.65;
  margin-top: 10px;
}

.snt-hero__divider-line {
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
}

.snt-hero__divider-motif {
  width: 8px;
  height: 8px;
  background: var(--color-gold-light);
  transform: rotate(45deg);
  box-shadow: 0 0 10px var(--color-gold);
}


/* ==========================================================================
   3. STAGGERED PAGE-LOAD ANIMATIONS
   ========================================================================== */

/* Animation Keyframes */
@keyframes sntFadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sntHeaderFade {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered Delay Application */
.snt-animate-header {
  animation: sntHeaderFade 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
  opacity: 0;
}

.snt-animate-eyebrow {
  animation: sntFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
  opacity: 0;
}

.snt-animate-heading {
  animation: sntFadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
  opacity: 0;
}

.snt-animate-text {
  animation: sntFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 1.0s forwards;
  opacity: 0;
}

.snt-animate-cta-primary {
  animation: sntFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 1.2s forwards;
  opacity: 0;
}

.snt-animate-cta-secondary {
  animation: sntFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 1.35s forwards;
  opacity: 0;
}

.snt-animate-divider {
  animation: sntFadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 1.5s forwards;
  opacity: 0;
}


/* ==========================================================================
   4. HERO SLIDER CONTROLS & PAGINATION
   ========================================================================== */

.snt-hero__controls {
  position: absolute;
  bottom: 44px;
  right: 60px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 28px;
  background: rgba(14, 12, 10, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 12px 24px;
  border-radius: 40px;
  border: 1px solid rgba(212, 175, 55, 0.2);
}

.snt-hero__counter {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--color-gold-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.snt-hero__counter-total {
  opacity: 0.5;
  font-size: 13px;
}

/* Progress Line Timer */
.snt-hero__progress-bar {
  width: 90px;
  height: 2px;
  background: rgba(253, 251, 247, 0.15);
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}

.snt-hero__progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold));
  border-radius: 2px;
}

.snt-hero__progress-fill.is-animating {
  animation: sntTimerProgress 6s linear forwards;
}

@keyframes sntTimerProgress {
  from { width: 0%; }
  to { width: 100%; }
}

/* Arrow Controls */
.snt-hero__arrows {
  display: flex;
  align-items: center;
  gap: 8px;
}

.snt-hero__arrow {
  background: none;
  border: 1px solid rgba(253, 251, 247, 0.2);
  color: var(--color-ivory);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.snt-hero__arrow:hover {
  background: var(--color-gold);
  color: var(--color-obsidian);
  border-color: var(--color-gold);
}

.snt-hero__arrow svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}


/* ==========================================================================
   5. RESPONSIVE ADAPTATIONS
   ========================================================================== */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .snt-header__nav {
    display: none;
  }
  
  .snt-header__cta-desktop {
    display: none;
  }
  
  .snt-header__toggle {
    display: flex;
  }
  
  .snt-hero__container {
    padding-left: 32px;
    padding-right: 32px;
  }

  .snt-hero__controls {
    bottom: 32px;
    right: 32px;
  }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {
  .snt-header {
    height: 80px;
  }
  
  .snt-header.is-scrolled {
    height: 68px;
  }
  
  .snt-header__container {
    padding: 0 20px;
  }

  .snt-header__logo img {
    height: 38px;
  }

  .snt-hero {
    height: 90vh;
    min-height: 600px;
  }
  
  .snt-hero__container {
    padding: 100px 20px 80px;
  }
  
  .snt-hero__content {
    max-width: 100%;
  }

  .snt-hero__eyebrow {
    font-size: 11px;
    letter-spacing: 3px;
  }

  .snt-hero__heading {
    font-size: clamp(34px, 8vw, 44px);
    margin-bottom: 18px;
  }

  .snt-hero__text {
    font-size: 15px;
    margin-bottom: 28px;
  }

  .snt-hero__ctas {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .snt-btn-primary,
  .snt-btn-secondary {
    width: 100%;
    padding: 15px 24px;
  }

  .snt-hero__controls {
    bottom: 24px;
    right: 50%;
    transform: translateX(50%);
    width: calc(100% - 40px);
    justify-content: space-between;
  }
  
  .snt-hero__progress-bar {
    width: 70px;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  .snt-hero__image {
    transition: none !important;
    transform: none !important;
  }
  
  .snt-animate-header,
  .snt-animate-eyebrow,
  .snt-animate-heading,
  .snt-animate-text,
  .snt-animate-cta-primary,
  .snt-animate-cta-secondary,
  .snt-animate-divider {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  
  .snt-hero__progress-fill.is-animating {
    animation: none !important;
  }
}