:root {
  --bg-color: #000000;
  --text-color: #ffffff;
  --accent-color: #ffffff;
  --bg-secondary: #0a0a0a;
  --text-secondary: #a0a0a0;
  --border-color: #222222;
  --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background-color: var(--accent-color);
  color: var(--bg-color);
}

a {
  color: var(--text-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: var(--transition);
}

a:hover {
  opacity: 0.7;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Nav */
header {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  mix-blend-mode: difference;
  transition: background-color 0.4s ease, backdrop-filter 0.4s ease, border-bottom 0.4s ease;
}

.nav.scrolled {
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  mix-blend-mode: normal;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-color);
  text-decoration: none;
}

/* Hero Section */
.hero {
  text-align: left;
}

.hero h1 {
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 900;
  line-height: 0.9;
  text-transform: uppercase;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(30px);
  animation: reveal 1s forwards cubic-bezier(0.16, 1, 0.3, 1) 0.2s;
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  max-width: 600px;
  opacity: 0;
  transform: translateY(20px);
  animation: reveal 1s forwards cubic-bezier(0.16, 1, 0.3, 1) 0.4s;
}

/* Services Section */
.section {
  padding: 8rem 0;
  border-top: 1px solid var(--border-color);
}

.section-title {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
  margin-bottom: 4rem;
  display: block;
}

/* Services Accordion */
.services-accordion {
  max-width: 900px;
}

.accordion-item {
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.accordion-header {
  padding: 2rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.accordion-header h3 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  margin: 0;
  transition: var(--transition);
}

.accordion-header .icon {
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform 0.4s ease;
}

.accordion-item.active .accordion-header h3 {
  color: var(--accent-color);
}

.accordion-item.active .icon {
  transform: rotate(45deg);
}

.accordion-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.accordion-item.active .accordion-content {
  grid-template-rows: 1fr;
  padding-bottom: 2rem;
}

.service-details {
  min-height: 0;
  overflow: hidden;
}

.service-details p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.8;
  max-width: 700px;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0;
}

.feature-list li {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-color);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.feature-list li:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.accordion-item:hover .accordion-header h3 {
  padding-left: 0.5rem;
}

/* Clients Section */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 4rem;
}

@media (min-width: 768px) {
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .clients-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Legacy Clients Section */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 768px) {
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .clients-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.client-item {
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: #080808;
  border: 1px solid #1a1a1a;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 80px;
}

.client-item:hover {
  color: var(--text-color);
  background: #0d0d0d;
  border-color: #333;
  transform: translateY(-3px);
}

/* Featured Clients Section */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .featured-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .featured-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.featured-item {
  aspect-ratio: 1 / 1;
  background: #080808;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2.5rem;
  transition: var(--transition);
  cursor: pointer;
}

.featured-item:hover {
  background: #0d0d0d;
  border-color: #333;
  transform: translateY(-5px);
}

.featured-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: grayscale(1) brightness(0.8);
  transition: var(--transition);
}

.featured-item:hover img {
  filter: grayscale(0) brightness(1);
}

/* Partner Clients Section (Dense Grid) */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .partner-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.partner-item {
  aspect-ratio: 1 / 1;
  background: #080808;
  border: 1px solid #1a1a1a;
  border-radius: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.partner-item:hover {
  background: #0d0d0d;
  border-color: #333;
  transform: translateY(-5px);
}

.partner-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) brightness(0.8);
  transition: var(--transition);
}

.partner-item:hover img {
  filter: grayscale(0) brightness(1);
}

/* Footer */
footer {
  padding: 4rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
}

.copyright {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Animations */
@keyframes reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Cursor Glow Effect */
.glow {
  position: fixed;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity 1s ease;
}

@media (max-width: 768px) {
  .nav {
    padding: 1.5rem;
  }

  .section {
    padding: 4rem 0;
  }

  .glow {
    display: none;
  }
}

/* View All Link */
.view-all-container {
  display: flex;
  justify-content: center;
  padding: 4rem 0 8rem;
}

.view-all-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 3rem;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  color: var(--text-color);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
}

.view-all-btn:hover {
  background: var(--text-color);
  color: var(--bg-color);
  border-color: var(--text-color);
  transform: translateY(-2px);
}

.view-all-btn svg {
  transition: transform 0.3s ease;
}

.view-all-btn:hover svg {
  transform: translateX(4px);
}