/* ==========================================================================
   CSS Custom Properties — Premium Dark / Light Hybrid Design System
   ========================================================================== */
:root {
  /* Dark section palette */
  --dark-bg:        #060d1f;
  --dark-bg-2:      #0d1829;
  --dark-bg-card:   rgba(255,255,255,0.04);
  --dark-border:    rgba(255,255,255,0.08);
  --dark-text:      #f1f5f9;
  --dark-text-muted: #94a3b8;

  /* Light section palette */
  --light-bg:       #ffffff;
  --light-bg-2:     #f8fafc;
  --light-text:     #1e293b;
  --light-text-muted: #64748b;
  --light-border:   #e2e8f0;

  /* Brand colours */
  --blue:           #2563eb;
  --blue-light:     #3b82f6;
  --blue-dim:       rgba(37,99,235,0.12);
  --gold:           #f59e0b;
  --gold-dim:       rgba(245,158,11,0.15);
  --green:          #10b981;
  --green-dim:      rgba(16,185,129,0.15);

  /* Keep legacy vars for JS compatibility */
  --color-primary: #2563eb;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  
  --color-secondary: #ec4899;
  --color-secondary-light: #f472b6;
  --color-secondary-dark: #db2777;
  
  --color-accent: #06b6d4;
  --color-accent-light: #22d3ee;
  --color-accent-dark: #0891b2;
  
  /* Text Colors */
  --color-text: #111827;
  --color-text-light: #6b7280;
  --color-text-muted: #9ca3af;
  
  /* Background Colors */
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-dark: #111827;
  
  /* Border Colors */
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 3rem;
  --space-4xl: 4rem;
  --space-5xl: 5rem;
  --space-6xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  /* New design tokens */
  --radius-sm:  0.375rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.14), 0 2px 8px rgba(0,0,0,0.06);

  --transition: 240ms cubic-bezier(.4,0,.2,1);
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 240ms cubic-bezier(.4,0,.2,1);

  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --nav-height: 4.5rem;
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--light-text);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
svg { display: block; }
ul { list-style: none; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 2rem;
}
.section-dark  { background: var(--dark-bg);  padding: 6rem 0; }
.section-light { background: var(--light-bg); padding: 6rem 0; }

/* ==========================================================================
   Section Typography Helpers
   ========================================================================== */
.section-label,
.section-label-dark {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.section-label      { color: var(--blue-light); }
.section-label-dark { color: var(--blue); }

.section-title-light {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  color: var(--dark-text);
  margin-bottom: 1rem;
}
.section-title-dark {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  color: var(--light-text);
  margin-bottom: 1rem;
  text-align: center;
}
.section-subtitle-light {
  font-size: 1.125rem;
  color: var(--dark-text-muted);
  max-width: 640px;
  line-height: 1.7;
}
.section-subtitle-dark {
  font-size: 1.125rem;
  color: var(--light-text-muted);
  max-width: 640px;
  margin: 0 auto 3.5rem;
  text-align: center;
  line-height: 1.7;
}

/* ==========================================================================
   NAV
   ========================================================================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: transparent;
  z-index: 1000;
  transition: background var(--transition), border-bottom var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(6,13,31,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--dark-border);
  box-shadow: 0 2px 24px rgba(0,0,0,0.25);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 2rem;
}
.nav-logo { display: flex; align-items: center; }
.logo-text {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--blue), #818cf8);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: -0.02em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(241,245,249,0.75);
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover,
.nav-link.active { color: #fff; background: rgba(255,255,255,0.07); }
.nav-link--cta {
  color: #fff !important;
  background: var(--blue) !important;
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-full);
  font-weight: 600;
}
.nav-link--cta:hover { background: var(--blue-light) !important; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  width: 2rem;
  height: 2rem;
  justify-content: center;
  gap: 5px;
}
.nav-toggle-line {
  width: 100%;
  height: 2px;
  background: var(--dark-text);
  transition: all 200ms ease;
  transform-origin: center;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  min-height: 100vh;
  background: var(--dark-bg);
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(37,99,235,0.12) 0%, transparent 65%);
  pointer-events: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
  padding-top: 3rem;
  padding-bottom: 3rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--blue-light);
  background: var(--blue-dim);
  border: 1px solid rgba(37,99,235,0.25);
  border-radius: var(--radius-full);
  padding: 0.375rem 1rem;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 1.5rem;
  line-height: 1.15;
}
.hero-name {
  background: linear-gradient(135deg, var(--blue-light) 0%, #818cf8 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-description {
  font-size: 1.125rem;
  color: var(--dark-text-muted);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 2rem;
}
.hero-description em { color: var(--dark-text); font-style: normal; font-weight: 500; }

/* Trust tags */
.hero-trust-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
}
.trust-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--dark-text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-full);
  padding: 0.375rem 0.875rem;
}
.trust-tag svg { width: 0.875rem; height: 0.875rem; stroke-width: 2.5; color: var(--blue-light); }

/* CTA buttons */
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  font-family: var(--font-body);
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,99,235,0.35);
}
.btn-primary:hover {
  background: var(--blue-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.45);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--dark-text);
  border-color: var(--dark-border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.2);
  color: #fff;
}
.btn-full { width: 100%; }
.btn-icon { width: 1rem; height: 1rem; stroke-width: 2; }

/* Override ghost for dark about section */
.about.section-dark .btn-ghost {
  color: var(--dark-text-muted);
  border-color: var(--dark-border);
}
.about.section-dark .btn-ghost:hover {
  color: #fff;
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.2);
}

/* Override btn-primary for light contact section */
.contact.section-light .btn-primary {
  background: var(--blue);
  color: #fff;
}

/* Hero image */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-image-wrap {
  position: relative;
  width: 340px;
  height: 340px;
}
.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  position: relative;
  z-index: 2;
  border: 3px solid var(--dark-border);
}
.hero-image-ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 2px solid rgba(37,99,235,0.3);
  z-index: 1;
  animation: rotate-ring 20s linear infinite;
}
.hero-image-ring::before {
  content: '';
  position: absolute;
  top: -4px; left: 50%;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue-light);
  transform: translateX(-50%);
}
.hero-image-glow {
  position: absolute;
  inset: -30px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(37,99,235,0.14) 0%, transparent 70%);
  z-index: 0;
}
@keyframes rotate-ring { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ==========================================================================
   SERVICES
   ========================================================================== */
.services .container { text-align: left; }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
.service-card {
  background: var(--dark-bg-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  backdrop-filter: blur(4px);
}
.service-card:hover {
  border-color: rgba(37,99,235,0.45);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0,0,0,0.3), 0 0 0 1px rgba(37,99,235,0.15);
}
.service-card--featured {
  border-color: rgba(37,99,235,0.35);
  background: linear-gradient(145deg, rgba(37,99,235,0.08), rgba(37,99,235,0.03));
}
.service-card-badge {
  position: absolute;
  top: -12px; left: 1.5rem;
  background: var(--blue);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
}
.service-icon {
  width: 2.75rem;
  height: 2.75rem;
  background: var(--blue-dim);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.service-icon svg { width: 1.375rem; height: 1.375rem; stroke: var(--blue-light); stroke-width: 1.5; }
.service-title { font-size: 1.125rem; font-weight: 700; color: var(--dark-text); margin-bottom: 0.75rem; }
.service-desc { font-size: 0.9375rem; color: var(--dark-text-muted); line-height: 1.7; margin-bottom: 1.25rem; }
.service-points { display: flex; flex-direction: column; gap: 0.5rem; }
.service-points li {
  font-size: 0.875rem;
  color: var(--dark-text-muted);
  padding-left: 1.25rem;
  position: relative;
}
.service-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.55em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-light);
}

/* ==========================================================================
   STATS BRIDGE
   ========================================================================== */
.stats-bridge {
  background: linear-gradient(135deg, var(--dark-bg-2) 0%, #111827 100%);
  padding: 4rem 0;
  border-top: 1px solid var(--dark-border);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--dark-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-block {
  background: var(--dark-bg-2);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: background var(--transition);
}
.stat-block:hover { background: rgba(37,99,235,0.07); }
.stat-value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff, var(--blue-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.875rem; color: var(--dark-text-muted); font-weight: 500; line-height: 1.4; }

/* ==========================================================================
   PROCESS
   ========================================================================== */
.process .container { text-align: center; }
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 3rem;
}
.process-step {
  flex: 1;
  text-align: center;
  padding: 0 1.5rem;
}
.step-number {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-dim);
  border: 2px solid rgba(37,99,235,0.25);
  border-radius: 50%;
  width: 3rem; height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  letter-spacing: 0.04em;
}
.step-title { font-size: 1.0625rem; font-weight: 700; color: var(--light-text); margin-bottom: 0.625rem; }
.step-desc { font-size: 0.9rem; color: var(--light-text-muted); line-height: 1.7; }
.process-connector {
  flex-shrink: 0;
  width: 3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-dim), rgba(37,99,235,0.3));
  margin-top: 1.375rem;
  border-radius: 2px;
}

/* ==========================================================================
   CASE STUDY
   ========================================================================== */
.casestudy { position: relative; overflow: hidden; }
.casestudy::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), #818cf8, var(--gold));
}
.casestudy-inner { max-width: 960px; margin: 0 auto; }
.casestudy-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem; }
.cs-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--blue);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.75rem;
}
.cs-industry { font-size: 0.875rem; color: var(--dark-text-muted); font-weight: 500; }
.casestudy-title { font-size: clamp(1.625rem, 3.5vw, 2.25rem); color: var(--dark-text); margin-bottom: 1.25rem; line-height: 1.25; }
.casestudy-summary {
  font-size: 1.0625rem;
  color: var(--dark-text-muted);
  line-height: 1.75;
  max-width: 800px;
  margin-bottom: 3rem;
  border-left: 3px solid var(--blue);
  padding-left: 1.25rem;
}
.casestudy-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}
.cs-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--blue-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
}
.cs-bullets { display: flex; flex-direction: column; gap: 1.25rem; }
.cs-bullets li {
  display: flex;
  gap: 0.875rem;
  font-size: 0.9375rem;
  color: var(--dark-text-muted);
  line-height: 1.7;
}
.cs-bullets strong { color: var(--dark-text); font-weight: 600; }
.cs-bullet-icon {
  flex-shrink: 0;
  width: 1.25rem; height: 1.25rem;
  border-radius: 50%;
  background: var(--blue-dim);
  border: 1.5px solid rgba(37,99,235,0.35);
  margin-top: 0.2rem;
  position: relative;
}
.cs-bullet-icon::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--blue-light);
  transform: translate(-50%,-50%);
}
.casestudy-sidebar { display: flex; flex-direction: column; gap: 1.75rem; }
.cs-sidebar-title {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dark-text-muted);
  margin-bottom: 0.75rem;
}
.cs-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.cs-tag {
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--dark-border);
  color: var(--dark-text);
}
.cs-tag--gold { background: var(--gold-dim); border-color: rgba(245,158,11,0.3); color: #fbbf24; }
.cs-tag--green { background: var(--green-dim); border-color: rgba(16,185,129,0.3); color: #34d399; }

/* Case study — metrics strip */
.cs-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--dark-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 3rem;
  border: 1px solid var(--dark-border);
}
.cs-metric {
  background: var(--dark-bg-2);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.375rem;
  transition: background var(--transition);
}
.cs-metric:hover { background: rgba(37,99,235,0.07); }
.cs-metric-icon {
  width: 2rem; height: 2rem;
  background: var(--blue-dim);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.25rem;
}
.cs-metric-icon svg { width: 1rem; height: 1rem; stroke: var(--blue-light); }
.cs-metric-icon--gold { background: var(--gold-dim); }
.cs-metric-icon--gold svg { stroke: #fbbf24; }
.cs-metric-icon--green { background: var(--green-dim); }
.cs-metric-icon--green svg { stroke: #34d399; }
.cs-metric-value {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-text);
  line-height: 1.2;
}
.cs-metric-label { font-size: 0.75rem; color: var(--dark-text-muted); line-height: 1.35; }

/* Case study — improved sidebar blocks */
.cs-sidebar-block {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: border-color var(--transition);
}
.cs-sidebar-block:hover { border-color: rgba(37,99,235,0.3); }
.cs-sidebar-block--compliance { border-color: rgba(245,158,11,0.2); }
.cs-sidebar-block--compliance:hover { border-color: rgba(245,158,11,0.45); }
.cs-sidebar-block--outcomes { border-color: rgba(16,185,129,0.2); }
.cs-sidebar-block--outcomes:hover { border-color: rgba(16,185,129,0.45); }
.cs-sidebar-block-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.875rem;
}
.cs-sidebar-block-header svg {
  width: 0.875rem; height: 0.875rem;
  stroke: var(--dark-text-muted);
  flex-shrink: 0;
}
.cs-sidebar-block--compliance .cs-sidebar-block-header svg { stroke: #fbbf24; }
.cs-sidebar-block--outcomes .cs-sidebar-block-header svg { stroke: #34d399; }

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}
.project-card {
  background: var(--light-bg);
  border: 1px solid var(--light-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(37,99,235,0.25);
}
.project-image { width: 100%; height: 200px; overflow: hidden; background: var(--light-bg-2); }
.project-thumbnail {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.project-card:hover .project-thumbnail { transform: scale(1.04); }
.project-content { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.project-title { font-size: 1.0625rem; font-weight: 700; color: var(--light-text); margin-bottom: 0.625rem; }
.project-description { font-size: 0.9rem; color: var(--light-text-muted); line-height: 1.7; margin-bottom: 1.25rem; flex: 1; }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.25rem; }
.tech-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  background: var(--blue-dim);
  color: var(--blue);
  border-radius: var(--radius-full);
  border: 1px solid rgba(37,99,235,0.15);
}
.project-links { display: flex; gap: 1rem; }
.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue);
  transition: color var(--transition);
}
.project-link svg { width: 0.875rem; height: 0.875rem; stroke-width: 2; }
.project-link:hover { color: var(--blue-light); }

/* ==========================================================================
   SKILLS
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.skill-category {
  background: var(--light-bg);
  border: 1px solid var(--light-border);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.skill-category::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), #818cf8);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  opacity: 0;
  transition: opacity var(--transition);
}
.skill-category:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: rgba(37,99,235,0.2); }
.skill-category:hover::before { opacity: 1; }
.skill-category-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}
.skills-list { display: flex; flex-direction: column; gap: 0.5rem; }
.skill-item {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--light-bg-2);
  border: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.skill-item:hover { border-color: rgba(37,99,235,0.2); background: rgba(37,99,235,0.04); }
.skill-name { font-size: 0.9rem; font-weight: 500; color: var(--light-text); }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-content {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 5rem;
  align-items: center;
}
.about-image-wrap { position: relative; width: 100%; }
.about-photo {
  width: 100%;
  border-radius: var(--radius-2xl);
  object-fit: cover;
  position: relative;
  z-index: 2;
  border: 2px solid var(--dark-border);
}
.about-image-accent {
  position: absolute;
  bottom: -16px; right: -16px;
  width: 100%; height: 100%;
  border-radius: var(--radius-2xl);
  border: 2px solid rgba(37,99,235,0.25);
  z-index: 1;
}
.about-intro { font-size: 1.125rem; font-weight: 500; color: var(--dark-text); line-height: 1.7; margin-bottom: 1.25rem; }
.about-body { font-size: 0.9375rem; color: var(--dark-text-muted); line-height: 1.8; margin-bottom: 1rem; }
.about-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact .container { text-align: center; }
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
  text-align: left;
  margin-top: 3rem;
}
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-method { display: flex; align-items: flex-start; gap: 1rem; }
.contact-icon {
  flex-shrink: 0;
  width: 2.5rem; height: 2.5rem;
  background: var(--blue-dim);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-icon svg { width: 1.125rem; height: 1.125rem; stroke: var(--blue); stroke-width: 2; }
.contact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--light-text-muted);
  margin-bottom: 0.25rem;
}
.contact-value { font-size: 0.9375rem; font-weight: 500; color: var(--light-text); transition: color var(--transition); }
a.contact-value:hover { color: var(--blue); }
.contact-form {
  background: var(--light-bg);
  border: 1px solid var(--light-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
}
.contact-form-title { font-size: 1.25rem; font-weight: 700; color: var(--light-text); margin-bottom: 1.75rem; }
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 500; color: var(--light-text); margin-bottom: 0.5rem; }
.form-input,
.form-textarea {
  width: 100%;
  background: var(--light-bg-2);
  border: 1.5px solid var(--light-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--light-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  color: var(--light-text);
}
.form-input::placeholder,
.form-textarea::placeholder { color: #b0bec5; }
.form-input:focus,
.form-textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-textarea { resize: vertical; min-height: 130px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--dark-border);
  padding: 4rem 0 2rem;
}
.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand { display: flex; flex-direction: column; gap: 1rem; }
.footer-tagline { font-size: 0.9rem; color: var(--dark-text-muted); line-height: 1.7; max-width: 240px; }
.footer-nav-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dark-text-muted);
  margin-bottom: 1rem;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 0.625rem; }
.footer-link { font-size: 0.9rem; color: var(--dark-text-muted); transition: color var(--transition); }
.footer-link:hover { color: var(--dark-text); }
.social-links { display: flex; gap: 0.75rem; }
.social-link {
  width: 2.25rem; height: 2.25rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
}
.social-link svg { width: 1rem; height: 1rem; stroke: var(--dark-text-muted); stroke-width: 2; transition: stroke var(--transition); }
.social-link:hover { background: var(--blue-dim); border-color: rgba(37,99,235,0.35); }
.social-link:hover svg { stroke: var(--blue-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--dark-border);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-copyright,
.footer-credit { font-size: 0.8125rem; color: var(--dark-text-muted); }

/* ==========================================================================
   BACK TO TOP
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 2.75rem; height: 2.75rem;
  background: var(--blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  box-shadow: 0 4px 16px rgba(37,99,235,0.4);
  z-index: 999;
}
.back-to-top svg { width: 1.25rem; height: 1.25rem; stroke: #fff; stroke-width: 2.5; }
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--blue-light); transform: translateY(-3px); }

/* ==========================================================================
   SCROLL ANIMATION BASE
   ========================================================================== */
.project-card,
.skill-category,
.stat-block,
.service-card,
.process-step {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.project-card.fade-in,
.skill-category.fade-in,
.stat-block.fade-in,
.service-card.fade-in,
.process-step.fade-in { opacity: 1; transform: none; }

/* Hero slide-in */
.hero-content { opacity: 0; transform: translateX(-30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.hero-visual  { opacity: 0; transform: translateX(30px);  transition: opacity 0.6s ease, transform 0.6s ease; }
.hero-content.slide-in-left,
.hero-visual.slide-in-right { opacity: 1; transform: none; }

/* Skip link & screen-reader utility */
.skip-link { position: absolute; top: -40px; left: 6px; z-index: 1001; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}