/* ==========================================================================
   ATELIER AETHER - CSS Architecture & Design System
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* --- Design Tokens --- */
:root {
  /* Color Palette */
  --color-bg: #FAFAF8;
  --color-bg-alt: #F4F3EF;
  --color-text-primary: #1B1B1B;
  --color-text-secondary: #666666;
  --color-accent: #D97706;
  --color-accent-secondary: #0F766E;
  --color-soft-beige: #F5E9DA;
  --color-warm-white: #FFFDF8;
  --color-border: #E7E5E4;
  --color-hover: #F59E0B;
  --color-button-bg: #1B1B1B;
  --color-button-text: #FFFFFF;
  --color-button-hover: #D97706;

  /* Typography */
  --font-serif: 'Cormorant Garamond', serif;
  --font-sans: 'Inter', sans-serif;

  /* Spacing Scale (Generous, Swiss-inspired) */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 1rem;     /* 16px */
  --space-md: 2rem;     /* 32px */
  --space-lg: 4rem;     /* 64px */
  --space-xl: 8rem;     /* 128px */
  --space-xxl: 12rem;   /* 192px */

  /* Viewport Margins */
  --container-padding: 6%;

  /* Transitions */
  --transition-smooth: all 0.6s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-fast: all 0.3s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.625;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background-color: var(--color-soft-beige);
  color: var(--color-text-primary);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1.15;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2.8rem, 5.5vw, 6.2rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2.2rem, 4vw, 4.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.6rem, 2.5vw, 2.8rem);
  font-style: italic;
}

p {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.text-lead {
  font-size: 1.25rem;
  line-height: 1.6;
  font-weight: 300;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* --- Layout & Utilities --- */
.section {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.align-center {
  align-items: center;
}

.d-flex {
  display: flex;
}

.flex-column {
  flex-direction: column;
}

.justify-between {
  justify-content: space-between;
}

.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* --- Subtle Reveal Animations on Scroll --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1), transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }

/* Image reveal clip mask animation */
.img-reveal-wrapper {
  overflow: hidden;
  position: relative;
}

.img-reveal-wrapper img {
  transform: scale(1.15);
  transition: transform 1.8s cubic-bezier(0.25, 1, 0.5, 1);
}

.img-reveal-wrapper.active img {
  transform: scale(1);
}

/* --- Components --- */

/* 1. Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.2rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-button-bg);
  color: var(--color-button-text);
}

.btn-primary:hover {
  background-color: var(--color-button-hover);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-text-primary);
}

.btn-outline:hover {
  background-color: var(--color-text-primary);
  color: var(--color-bg);
}

.btn-group {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* 2. Navigation */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
}

.header-nav.scrolled {
  background-color: rgba(250, 250, 248, 0.95);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-border);
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.8rem var(--container-padding);
  transition: var(--transition-smooth);
}

.header-nav.scrolled .nav-container {
  padding: 0.8rem var(--container-padding);
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border-bottom: 1px solid var(--color-text-primary);
  padding-bottom: 2px;
}

.nav-cta:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Mobile Menu Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--color-text-primary);
  margin-bottom: 6px;
  transition: var(--transition-fast);
}

.mobile-nav-toggle span:last-child {
  margin-bottom: 0;
}

/* 3. Hero Section (Cinematic Split Layout) */
.hero {
  padding-top: 140px;
  min-height: 95vh;
  display: flex;
  align-items: center;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-lg);
  align-items: center;
  width: 100%;
}

.hero-text {
  max-width: 580px;
  padding-right: var(--space-md);
}

.hero-headline {
  margin-bottom: var(--space-md);
}

.hero-lead {
  margin-bottom: var(--space-md);
}

.hero-image-side {
  height: 65vh;
  position: relative;
  /* Slightly breaking grid */
  margin-right: -3vw;
}

.hero-image-side .img-reveal-wrapper {
  width: 100%;
  height: 100%;
}

.hero-image-side img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 4. Brand Statement / Ethos (Dieter Rams inspired) */
.ethos {
  background-color: var(--color-bg-alt);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
}

.ethos-content {
  max-width: 1000px;
  margin: 0 auto;
  text-align: left;
}

.ethos-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  display: inline-block;
}

.ethos-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.2vw, 3.6rem);
  line-height: 1.3;
  color: var(--color-text-primary);
  font-weight: 300;
}

.ethos-quote span {
  font-style: italic;
  color: var(--color-accent-secondary);
}

.ethos-signature {
  margin-top: var(--space-md);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 15px;
}

.ethos-signature::before {
  content: '';
  width: 40px;
  height: 1px;
  background-color: var(--color-border);
}

/* 5. Staggered Event Categories */
.categories-header {
  margin-bottom: var(--space-xl);
  max-width: 600px;
}

.category-row {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-xl);
  position: relative;
}

.category-row:nth-child(even) {
  flex-direction: row-reverse;
}

.category-media {
  width: 55%;
  height: 480px;
  position: relative;
}

.category-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.category-row:hover .category-media img {
  transform: scale(1.03);
}

.category-details {
  width: 45%;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: var(--color-bg);
  /* Asymmetric overlap overlay */
  margin-left: -5%;
  z-index: 2;
  position: relative;
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0,0,0,0.02);
}

.category-row:nth-child(even) .category-details {
  margin-left: 0;
  margin-right: -5%;
}

.category-num {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  font-style: italic;
}

.category-title {
  font-size: clamp(2rem, 3vw, 3rem);
  margin-bottom: var(--space-sm);
}

.category-desc {
  margin-bottom: var(--space-md);
  max-width: 420px;
}

.category-link {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.category-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.category-link:hover {
  color: var(--color-accent);
}

.category-link:hover::after {
  transform: translateX(5px);
}

/* 6. Signature Showcase (Grid breaking asymmetrical feature) */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: flex-start;
}

.showcase-card {
  position: relative;
}

/* Create asymmetry through heights and vertical offsets */
.showcase-card:nth-child(even) {
  margin-top: 100px;
}

.showcase-img-box {
  width: 100%;
  height: 580px;
  overflow: hidden;
  position: relative;
}

.showcase-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.showcase-card:hover .showcase-img-box img {
  transform: scale(1.05);
}

.showcase-info {
  margin-top: var(--space-md);
  max-width: 80%;
}

.showcase-tag {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
}

.showcase-title {
  font-size: 1.8rem;
  margin-top: var(--space-xs);
  margin-bottom: var(--space-sm);
}

/* 7. Pinterest Masonry Gallery */
.gallery-header {
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.gallery-grid {
  column-count: 3;
  column-gap: var(--space-md);
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: var(--space-md);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--color-border);
}

.gallery-item img {
  width: 100%;
  display: block;
  transition: transform 1.5s cubic-bezier(0.25, 1, 0.5, 1);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(27, 27, 27, 0.35);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 2;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-meta {
  color: #FFFFFF;
}

.gallery-meta span {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-soft-beige);
}

.gallery-meta h4 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: #FFFFFF;
  margin-top: 4px;
}

/* Fullscreen Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(250, 250, 248, 0.98);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-content {
  max-width: 85%;
  max-height: 80vh;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  box-shadow: 0 15px 50px rgba(0,0,0,0.05);
}

.lightbox-caption {
  margin-top: var(--space-sm);
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.25rem;
}

.lightbox-close {
  position: absolute;
  top: 40px;
  right: 40px;
  background: none;
  border: none;
  font-size: 2.5rem;
  font-weight: 200;
  cursor: pointer;
  color: var(--color-text-primary);
  width: 50px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  transition: var(--transition-fast);
}

.lightbox-close:hover {
  transform: rotate(90deg);
  color: var(--color-accent);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 2rem;
  font-weight: 200;
  cursor: pointer;
  color: var(--color-text-primary);
  padding: 1rem;
  transition: var(--transition-fast);
  user-select: none;
}

.lightbox-nav:hover {
  color: var(--color-accent);
}

.lightbox-prev {
  left: 40px;
}

.lightbox-next {
  right: 40px;
}

/* 8. Editorial Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-lg);
  align-items: center;
}

.testimonial-quote-box {
  position: relative;
}

.testimonial-quote-symbol {
  font-family: var(--font-serif);
  font-size: 8rem;
  line-height: 1;
  color: var(--color-soft-beige);
  position: absolute;
  top: -60px;
  left: -20px;
  z-index: -1;
  user-select: none;
}

.testimonial-text {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.2vw, 2.2rem);
  line-height: 1.4;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

.testimonial-author {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.testimonial-author span {
  font-weight: 300;
  color: var(--color-text-secondary);
  text-transform: none;
  letter-spacing: 0;
  display: block;
  margin-top: 4px;
}

.testimonial-media {
  height: 520px;
  border: 1px solid var(--color-border);
}

.testimonial-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 9. Bespoke Booking Form */
.booking-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-lg);
}

.booking-info {
  max-width: 460px;
}

.booking-title {
  margin-bottom: var(--space-md);
}

.booking-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.booking-fields .form-group-full {
  grid-column: span 2;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
}

.form-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  padding: 0.8rem 0;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text-primary);
  outline: none;
  transition: var(--transition-fast);
}

.form-input:focus {
  border-bottom-color: var(--color-text-primary);
}

.form-input::placeholder {
  color: #CCCCCC;
}

textarea.form-input {
  min-height: 100px;
  resize: vertical;
}

.form-submit-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-md);
}

.form-message {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  opacity: 0;
  transition: var(--transition-fast);
}

.form-message.success {
  opacity: 1;
  color: var(--color-accent-secondary);
}

.form-message.error {
  opacity: 1;
  color: var(--color-accent);
}

/* 10. Minimal Luxury Footer */
.footer {
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-lg);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-brand h3 {
  color: var(--color-bg);
  font-size: 2.2rem;
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  color: #A3A3A3;
  max-width: 320px;
}

.footer-links-col h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-soft-beige);
  margin-bottom: var(--space-md);
}

.footer-links-col ul {
  list-style: none;
}

.footer-links-col li {
  margin-bottom: var(--space-xs);
}

.footer-links-col a {
  color: #A3A3A3;
}

.footer-links-col a:hover {
  color: var(--color-bg);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  color: #A3A3A3;
  font-size: 0.75rem;
}

.footer-socials {
  display: flex;
  gap: var(--space-md);
}

.footer-socials a {
  color: #A3A3A3;
  transition: var(--transition-fast);
}

.footer-socials a:hover {
  color: var(--color-bg);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-text {
    max-width: 100%;
    padding-right: 0;
  }

  .hero-image-side {
    height: 50vh;
    margin-right: 0;
  }

  .category-row, .category-row:nth-child(even) {
    flex-direction: column;
  }

  .category-media {
    width: 100%;
    height: 380px;
  }

  .category-details, .category-row:nth-child(even) .category-details {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    margin-top: -30px;
  }

  .showcase-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .showcase-card:nth-child(even) {
    margin-top: 0;
  }

  .gallery-grid {
    column-count: 2;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .testimonial-media {
    height: 400px;
    order: -1;
  }

  .booking-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  /* Navigation */
  .mobile-nav-toggle {
    display: block;
    z-index: 1001;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: 100px var(--space-lg) var(--space-lg);
    box-shadow: -10px 0 30px rgba(0,0,0,0.05);
    transition: var(--transition-smooth);
    z-index: 1000;
  }

  .nav-links.active {
    right: 0;
  }

  .mobile-menu-open .mobile-nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .mobile-menu-open .mobile-nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-open .mobile-nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .gallery-grid {
    column-count: 1;
  }

  .booking-fields {
    grid-template-columns: 1fr;
  }

  .booking-fields .form-group-full {
    grid-column: span 1;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .lightbox-close {
    top: 20px;
    right: 20px;
  }

  .lightbox-nav {
    display: none; /* Hide on small mobile screen and rely on tap/touch */
  }
}