/* ==========================================================================
   CSS Variables & Reset - Premium Editorial Theme
   ========================================================================== */
:root {
  --color-bg: #EAE6DF;
  --color-surface: #F5F3EF;
  --color-text: #232220;
  --color-text-muted: #6B6761;
  --color-accent: #8C7A6B;
  --color-border: rgba(35, 34, 32, 0.1);
  --color-white: #FFFFFF;
  
  --font-primary: "Helvetica Neue", "Inter", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  --font-serif: "Didot", "Bodoni MT", "Playfair Display", "Times New Roman", serif;
  
  --space-xs: 0.5rem;
  --space-sm: 1.5rem;
  --space-md: 3rem;
  --space-lg: 6rem;
  --space-xl: 10rem;
  --space-xxl: 16rem;

  --nav-height: 100px;
  --grid-gap: 2rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1A1918;
    --color-surface: #242220;
    --color-text: #F2EFEB;
    --color-text-muted: #A39E97;
    --color-border: rgba(242, 239, 235, 0.1);
    --color-accent: #B5A596;
  }
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.4s ease;
}

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

ul { list-style: none; }

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  color: var(--color-text);
}

.title-hero {
  font-size: clamp(3.5rem, 8vw, 8rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.title-section {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.title-module {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--space-sm);
}

.text-lead {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-text-muted);
  max-width: 65ch;
  line-height: 1.6;
}

.text-body {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.6;
}

.text-meta {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   Grid Systems
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xl) 0;
  position: relative;
}

/* Asymmetric Grid */
.grid-asymmetric {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}
@media (min-width: 1024px) {
  .grid-asymmetric {
    grid-template-columns: 5fr 7fr;
  }
  .grid-asymmetric.reverse {
    grid-template-columns: 7fr 5fr;
  }
}

/* Editorial 12-col Grid */
.grid-editorial {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--grid-gap);
}
.grid-editorial > * { grid-column: span 12; }

@media (min-width: 768px) {
  .grid-editorial > .col-4 { grid-column: span 4; }
  .grid-editorial > .col-6 { grid-column: span 6; }
  .grid-editorial > .col-8 { grid-column: span 8; }
  .grid-editorial > .offset-2 { grid-column-start: 3; }
  .grid-editorial > .offset-4 { grid-column-start: 5; }
}

/* Fluid Auto Grid */
.grid-fluid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-md);
}

/* ==========================================================================
   Components
   ========================================================================== */
/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  z-index: 100;
  background: transparent;
  transition: background 0.4s ease, backdrop-filter 0.4s ease;
}
.navbar.is-scrolled {
  background: rgba(234, 230, 223, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
@media (prefers-color-scheme: dark) {
  .navbar.is-scrolled {
    background: rgba(26, 25, 24, 0.85);
  }
}

.brand h1 {
  font-size: 1.25rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-primary);
  font-weight: 500;
}

.nav-links {
  display: none;
  gap: 2.5rem;
}
@media (min-width: 1024px) {
  .nav-links { display: flex; }
}

.nav-link {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 1px;
  background: var(--color-text);
  transition: width 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}
.nav-link:hover::after {
  width: 100%;
}

.menu-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
}
@media (min-width: 1024px) { .menu-toggle { display: none; } }

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100vh;
  background: var(--color-bg);
  z-index: 101;
  display: flex; flex-direction: column;
  justify-content: center; align-items: center; gap: 2rem;
  transform: translateY(-100%);
  transition: transform 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}
.mobile-menu.is-open { transform: translateY(0); }
.mobile-menu .nav-link { font-size: 2rem; font-family: var(--font-serif); text-transform: none; letter-spacing: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 3rem;
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
  border-radius: 2px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.4s ease;
  will-change: transform;
}
.btn:hover {
  background: transparent;
  color: var(--color-text);
}
.btn-outline {
  background: transparent;
  color: var(--color-text);
}
.btn-outline:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

/* Specific Modules */
.service-card {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}
.service-card ul { margin-top: 1.5rem; }
.service-card li {
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}
.service-card li span:first-child {
  font-weight: 500;
  color: var(--color-text);
}

.case-study {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  margin-bottom: var(--space-lg);
}

.insight-card {
  display: block;
  group: insight;
}
.insight-card .img-wrap {
  aspect-ratio: 4/5;
  margin-bottom: 1.5rem;
}
.insight-card:hover .img-wrap img {
  transform: scale(1.05);
}

/* Image Wrappers */
.img-wrap {
  width: 100%;
  overflow: hidden;
  position: relative;
  background: var(--color-border);
}
.img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.19, 1, 0.22, 1);
  will-change: transform;
}
.img-wrap.aspect-video { aspect-ratio: 16/9; }
.img-wrap.aspect-portrait { aspect-ratio: 4/5; }
.img-wrap.aspect-square { aspect-ratio: 1/1; }

/* Footer */
.footer {
  padding: var(--space-xl) var(--space-md) var(--space-md);
  border-top: 1px solid var(--color-border);
  text-align: center;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  text-align: left;
  max-width: 1200px;
  margin-inline: auto;
}

/* ==========================================================================
   Visual Effects & Animations
   ========================================================================== */
.page-transition-layer {
  position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
  background: var(--color-text); z-index: 9999;
  transform: scaleY(0); transform-origin: bottom; pointer-events: none;
}

/* Scroll-linked reveal */
.reveal-up {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 1.2s cubic-bezier(0.19, 1, 0.22, 1), transform 1.2s cubic-bezier(0.19, 1, 0.22, 1);
  will-change: opacity, transform;
}
.reveal-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Parallax */
.parallax-wrap {
  overflow: hidden;
  position: relative;
}
.parallax-img {
  width: 100%;
  height: 120%;
  object-fit: cover;
  transform-origin: center;
  will-change: transform;
}

/* Direction Hover */
.hover-field { position: relative; overflow: hidden; }
.hover-field::before {
  content: ''; position: absolute; top: var(--y, 50%); left: var(--x, 50%);
  width: 250%; height: 250%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 50%);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
  pointer-events: none; z-index: 10;
}
.hover-field:hover::before { transform: translate(-50%, -50%) scale(1); }

/* Kinetic Text */
.kinetic-text span {
  display: inline-block; opacity: 0; transform: translateY(30px) rotate(2deg);
  transition: opacity 0.8s ease, transform 1s cubic-bezier(0.19, 1, 0.22, 1);
}
.kinetic-text.is-visible span { opacity: 1; transform: translateY(0) rotate(0deg); }

/* Focus Dimming */
.focus-section { transition: opacity 0.6s ease, filter 0.6s ease; }
body.is-scrolling .focus-section:not(.is-in-view) { opacity: 0.3; filter: blur(3px); }

/* SVG Morph */
.svg-morph path { transition: d 0.5s cubic-bezier(0.4, 0, 0.2, 1); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal-up, .kinetic-text span { transform: none !important; opacity: 1 !important; }
}