/* ========================================
   Design Tokens
   ======================================== */
:root {
  /* Colors */
  --color-bg: #ffffff;
  --color-text-primary: #000000;
  --color-text-secondary: #515f6b;
  --color-text-muted: #646464;
  --color-surface-dark: #000000;
  --color-button-dark: #252525;
  --color-border: #c8c8c8;
  --color-border-light: #f2f2f2;
  --color-nav-bg: rgba(232, 232, 232, 0.2);
  
  /* Typography */
  --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  
  /* Font Weights */
  --weight-light: 300;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  
  /* Spacing */
  --space-xs: 6px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 40px;
  --space-3xl: 48px;
  --space-4xl: 80px;
  --space-5xl: 104px;
  
  /* Layout */
  --container-padding: 80px;
  --header-padding-x: 80px;
  --header-padding-y: 16px;
  --max-width: 1728px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-full: 100px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--weight-regular);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-width: 100%;
  overflow-x: clip;
}

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

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-medium);
  line-height: 1.2;
}

.hero-title {
  font-size: 52px;
  font-weight: var(--weight-medium);
}

.hero-subtitle {
  font-size: 24px;
  font-weight: var(--weight-light);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.case-study-title {
  font-size: 32px;
  font-weight: var(--weight-medium);
}

.case-study-description {
  font-size: 18px;
  font-weight: var(--weight-regular);
  color: var(--color-text-secondary);
  line-height: 2;
}

/* ========================================
   Layout
   ======================================== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--header-padding-y) var(--header-padding-x);
  max-width: var(--max-width);
  margin: 0 auto;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 80px;
}

/* ========================================
   Components: Navigation
   ======================================== */
.logo {
  display: block;
  transition: opacity var(--transition-fast);
}

.logo svg,
.logo img {
  display: block;
  width: 54px;
  height: 50px;
}

.logo:hover {
  opacity: 0.8;
}

.nav-pill {
  position: fixed;
  top: var(--header-padding-y);
  right: max(
    var(--header-padding-x),
    calc((100% - var(--max-width)) / 2 + var(--header-padding-x))
  );
  z-index: 100;
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 4px;
  background: var(--color-nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-full);
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: 16px;
  font-weight: var(--weight-regular);
  line-height: 1;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

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

.nav-link.active {
  background: var(--color-surface-dark);
  color: #ffffff;
  font-weight: var(--weight-semibold);
}

.nav-link.active:hover {
  color: #ffffff;
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  z-index: 110;
  border-radius: 12px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

body.nav-open {
  overflow: hidden;
}

body.nav-open .nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

body.nav-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

body.nav-open .nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   Components: Hero Section
   ======================================== */
.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-top: 108px;
  padding-bottom: var(--space-4xl);
}

.hero-content {
  max-width: 768px;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.hero-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 13px;
  padding-top: var(--space-sm);
}

.availability-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
}

.pulse-dot {
  width: 24px;
  height: 24px;
  background: radial-gradient(circle, #22c55e 30%, transparent 70%);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

.location {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-secondary);
  display: flex;
  gap: var(--space-xs);
}

/* ========================================
   Components: Case Studies Grid
   ======================================== */
.case-studies {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  padding-bottom: var(--space-4xl);
}

.case-study-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-bottom: 60px;
  height: 100%;
}

.case-study-image {
  position: relative;
  width: 100%;
  aspect-ratio: 768 / 726;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #f5f5f5;
}

.case-study-image .mockup {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-study-image .client-logo {
  position: absolute;
  top: var(--space-xl);
  left: var(--space-xl);
  height: 36px;
  width: auto;
  z-index: 1;
}

.case-study-image .client-logo--citi {
  height: 26px;
}

/* Coming Soon Overlay */
.coming-soon-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-md);
  z-index: 2;
}

.coming-soon-text {
  font-size: 48px;
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  text-align: center;
  padding: var(--space-xl);
}

.case-study-card--coming-soon {
  pointer-events: none;
}

.case-study-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  flex: 1;
}

.case-study-content .case-study-title {
  margin-bottom: 0;
}

.case-study-content .case-study-description {
  max-width: 636px;
}

.case-study-content .btn {
  margin-top: auto;
}

/* ========================================
   Components: Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  padding: var(--space-md) var(--space-xl);
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  width: fit-content;
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.btn-disabled,
.btn:disabled {
  padding: var(--space-md) var(--space-xl);
  background-color: #f5f5f5;
  color: #6e6e6e;
  font-weight: var(--weight-medium);
  width: fit-content;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
  border: none;
}

.btn-disabled:hover,
.btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-button-dark);
  color: var(--color-bg);
}

.btn-secondary:hover {
  background-color: #333;
}

/* ========================================
   Components: Footer
   ======================================== */
.footer {
  background-color: var(--color-surface-dark);
  padding: var(--space-4xl) 80px var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-5xl);
}

/* Keep footer content aligned with the centered main content column */
.footer > * {
  width: 100%;
  max-width: calc(var(--max-width) - 2 * var(--container-padding));
  margin: 0 auto;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.copyright {
  text-align: right;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-title {
  font-size: 32px;
  font-weight: var(--weight-medium);
  color: var(--color-bg);
}

.footer-description {
  font-size: 18px;
  color: var(--color-bg);
  line-height: 2;
}

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

.copyright {
  font-size: 12px;
  color: var(--color-bg);
  text-align: right;
}

/* ========================================
   Animations: Initial States (for GSAP)
   Keep content visible if JS/GSAP fails.
   ======================================== */
[data-animate] {
  will-change: transform, opacity;
}

.hero-title,
.hero-subtitle,
.hero-meta {
  will-change: transform, opacity;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1400px) {
  :root {
    --header-padding-x: 48px;
  }

  .header,
  main,
  .footer {
    padding-left: 48px;
    padding-right: 48px;
  }
  
  .hero-title {
    font-size: 44px;
  }
}

@media (max-width: 1024px) {
  .nav-toggle {
    display: flex;
    position: fixed;
    top: var(--header-padding-y);
    right: var(--header-padding-x);
  }

  .nav-pill {
    position: fixed;
    inset: 0;
    top: 0;
    right: 0;
    left: 0;
    z-index: 105;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 96px 32px 48px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav-pill.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-pill .nav-link {
    font-size: 28px;
    padding: 16px 24px;
  }

  .case-studies {
    grid-template-columns: 1fr;
  }
  
  .hero {
    flex-direction: column;
    gap: var(--space-xl);
    padding-top: 88px;
  }
  
  .hero-meta {
    align-items: flex-start;
  }

  .coming-soon-text {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-padding-x: 24px;
  }

  .header,
  main,
  .footer {
    padding-left: 24px;
    padding-right: 24px;
  }
  
  .nav-pill {
    gap: var(--space-md);
  }
  
  .hero-title {
    font-size: 36px;
  }
  
  .hero-subtitle {
    font-size: 18px;
  }
  
  .case-study-title {
    font-size: 24px;
  }

  .case-study-description {
    font-size: 16px;
    line-height: 1.7;
  }

  .case-study-card {
    padding-bottom: 32px;
  }

  .case-study-image .client-logo {
    top: var(--space-lg);
    left: var(--space-lg);
    height: 28px;
  }
  
  .coming-soon-text {
    font-size: 28px;
  }
  
  .footer {
    padding-top: var(--space-3xl);
    gap: var(--space-3xl);
  }

  .footer-title {
    font-size: 24px;
  }
  
  .footer-links {
    flex-wrap: wrap;
  }

  .copyright {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }

  .nav-pill .nav-link {
    font-size: 22px;
  }

  .coming-soon-text {
    font-size: 24px;
  }

  .logo svg,
  .logo img {
    width: 44px;
    height: 41px;
  }
}