/* GKN Digital - Premium Design System */

/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --gray: #64748b;
  --light: #f1f5f9;
  --white: #ffffff;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #2563eb 100%);
  --gradient-card: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Outfit', var(--font-primary);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Layout */
  --safe-area-top: 0px;
  --header-offset: 96px;
  --header-buffer: 0px;
}

@supports (padding-top: env(safe-area-inset-top)) {
  :root {
    --safe-area-top: env(safe-area-inset-top);
    --header-offset: calc(96px + var(--safe-area-top));
  }
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: calc(var(--header-offset) + var(--header-buffer));
}

body {
  font-family: var(--font-primary);
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--primary-dark);
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 80px);
}

.container-wide {
  max-width: 1600px;
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  will-change: box-shadow;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  gap: var(--spacing-md);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-icon {
  font-size: 1.75rem;
  -webkit-text-fill-color: initial;
}

.logo-img {
  height: 28px;
  width: auto;
  object-fit: contain;
  flex: 0 0 auto;
}

@media (min-width: 769px) {
  .header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: rgba(255, 255, 255, 0.98);
  }

  .header .logo-img {
    height: 32px;
  }
}

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

.nav-link {
  color: var(--dark);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-base);
  font-size: 0.95rem;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-base);
  will-change: transform;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.lang-switcher {
  display: flex;
  gap: var(--spacing-xs);
}

.lang-btn {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--light);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  font-weight: 500;
  font-size: 0.875rem;
}

.lang-btn:link,
.lang-btn:visited {
  color: var(--dark);
}

.lang-btn.active {
  background: var(--gradient-primary);
  color: var(--white);
  border-color: transparent;
}

.lang-btn.active:link,
.lang-btn.active:visited {
  color: var(--white);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  color: var(--white);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

/* Internal pages: reuse hero visuals without full-screen height */
.hero--page {
  min-height: auto;
  padding-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-xl));
  padding-bottom: var(--spacing-2xl);
}

.hero--page .hero-title {
  line-height: 1.24;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-hero);
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
  animation: float 20s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.hero-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
  font-weight: 500;
  animation: fadeInUp 0.8s ease;
}

.hero-title {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease 0.2s both;
  line-height: 1.1;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 0.4s both;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-bottom: var(--spacing-2xl);
  animation: fadeInUp 0.8s ease 0.6s both;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  justify-content: center;
  animation: fadeInUp 0.8s ease 0.8s both;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-mouse {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 12px;
  position: relative;
}

.scroll-mouse::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  font-size: 1rem;
}

/* Ensure legacy global `a:link/a:visited` rules don't override v2 buttons */
.btn:link,
.btn:visited {
  color: inherit;
}

.btn-large {
  padding: 1.25rem 2.5rem;
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.btn-primary:link,
.btn-primary:visited {
  color: var(--white);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  color: var(--white);
}

.btn-primary svg {
  transition: transform var(--transition-base);
}

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

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:link,
.btn-outline:visited {
  color: var(--white);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
}

/* Avoid legacy global hover color on navigation links */
.nav-link:hover {
  color: var(--primary-dark);
}

/* ===== Section Styles ===== */
section {
  padding: var(--spacing-2xl) 0;
  position: relative;
  scroll-margin-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-md));
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: var(--gradient-card);
  border-radius: 50px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  margin-bottom: var(--spacing-md);
  font-size: clamp(2rem, 4vw, 3rem);
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray);
  line-height: 1.7;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== About Section ===== */
.about {
  background: var(--white);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.about-item {
  padding: var(--spacing-lg);
  background: var(--light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.about-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.about-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.about-visual {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.about-card {
  padding: var(--spacing-lg);
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.about-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.about-card:first-child {
  grid-column: 1 / -1;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.about-card h4 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.125rem;
}

.about-card p {
  font-size: 0.875rem;
  margin: 0;
}

/* ===== Services Section ===== */
.services {
  background: var(--light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card.featured {
  border: 2px solid var(--primary);
  transform: scale(1.05);
}

.service-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: 0.25rem 0.75rem;
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.service-card.featured:hover {
  transform: translateY(-10px) scale(1.05);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--primary);
}

.service-icon svg {
  width: 32px;
  height: 32px;
}

.service-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.service-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.service-features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-features li {
  padding: 0.5rem 0;
  color: var(--gray);
  font-size: 0.95rem;
  position: relative;
  padding-left: 1.5rem;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

/* ===== Technologies Section ===== */
.technologies {
  background: var(--white);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.tech-category {
  padding: var(--spacing-lg);
  background: var(--light);
  border-radius: var(--radius-lg);
}

.tech-category h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
  color: var(--primary);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tech-tag {
  padding: 0.5rem 1rem;
  background: var(--white);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.tech-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: var(--gradient-primary);
  color: var(--white);
}

/* ===== Projects Section ===== */
.projects {
  background: var(--light);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.project-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  background: var(--white);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.project-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image {
  transform: scale(1.1);
}

.project-content {
  padding: var(--spacing-md);
}

.project-content h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.25rem;
}

.project-content p {
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
}

.project-skeleton {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.skeleton-image {
  width: 100%;
  height: 250px;
  background: var(--light);
  animation: pulse 2s ease-in-out infinite;
}

.skeleton-content {
  padding: var(--spacing-md);
}

.skeleton-title {
  width: 70%;
  height: 24px;
  background: var(--light);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  animation: pulse 2s ease-in-out infinite;
}

.skeleton-text {
  width: 100%;
  height: 16px;
  background: var(--light);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
  animation: pulse 2s ease-in-out infinite;
}

/* ===== Process Section ===== */
.process {
  background: var(--white);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  position: relative;
}

.process-step {
  text-align: center;
  padding: var(--spacing-lg);
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.process-step h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.process-step p {
  font-size: 0.95rem;
  margin: 0;
}

/* ===== CTA Section ===== */
.cta {
  background: var(--gradient-hero);
  color: var(--white);
  text-align: center;
}

.cta-content h2 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-content p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
}

/* ===== Contact Section ===== */
.contact {
  background: var(--white);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-2xl);
  align-items: start;
}

.contact-info {
  position: sticky;
  top: 100px;
}

.contact-info .section-header {
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: start;
}

.contact-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.contact-item a {
  color: var(--primary);
  font-weight: 500;
}

.contact-form {
  background: var(--light);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--dark);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--dark);
  font-family: var(--font-primary);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--gray);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 500;
  display: none;
}

.form-message.success {
  display: block;
  background: #10b981;
  color: var(--white);
}

.form-message.error {
  display: block;
  background: #ef4444;
  color: var(--white);
}

/* ===== Service Detail Pages ===== */
.service-page {
  background: var(--white);
}

.service-page-content {
  max-width: 980px;
  margin: 0 auto;
}

.service-page-media {
  margin-bottom: var(--spacing-xl);
}

.service-page-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: block;
}

.service-page-body p {
  margin-bottom: var(--spacing-md);
  color: var(--gray);
}

.service-page-body h3 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 1.35rem;
}

.service-page-body ul {
  padding-left: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.service-page-body li {
  margin-bottom: .5rem;
  color: var(--gray);
}

.service-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.service-nav-grid .service-card {
  padding: var(--spacing-lg);
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: var(--white);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.footer-links h4,
.footer-services h4 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-links ul,
.footer-services ul {
  list-style: none;
  padding: 0;
}

.footer-links li,
.footer-services li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-base);
}

/* Cover all footer links (brand + services too) and override legacy `a:link/a:visited` */
.footer a,
.footer a:link,
.footer a:visited {
  color: rgba(255, 255, 255, 0.7);
}

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

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

.footer-services li {
  color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes scroll {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(16px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.fade-in {
  animation: fadeInUp 0.8s ease;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-content,
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
  
  .contact-info {
    position: static;
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-offset: 120px;
    --header-buffer: 16px;
  }

  .header {
    background: rgba(255, 255, 255, 0.98);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  @supports (padding-top: env(safe-area-inset-top)) {
    :root {
      --header-offset: calc(120px + env(safe-area-inset-top));
    }
  }

  .nav {
    position: relative;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--light);
    border-radius: var(--radius-md);
    background: var(--white);
    box-shadow: var(--shadow-lg);
    z-index: 1010;
  }

  .nav-menu.mobile-open {
    display: flex;
  }

  .nav-link {
    display: block;
    padding: 0.75rem 0.5rem;
  }

  .hero:not(.hero--page) {
    padding-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-lg));
  }

  .hero--page {
    padding-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-lg));
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-stats {
    gap: var(--spacing-lg);
  }
  
  .services-grid,
  .projects-grid,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .service-nav-grid {
    grid-template-columns: 1fr;
  }
  
  .about-visual {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .tech-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --header-offset: 132px;
    --header-buffer: 24px;
  }

  @supports (padding-top: env(safe-area-inset-top)) {
    :root {
      --header-offset: calc(132px + env(safe-area-inset-top));
    }
  }

  .hero--page {
    padding-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-md));
  }

  .hero:not(.hero--page) {
    padding-top: calc(var(--header-offset) + var(--header-buffer) + var(--spacing-md));
  }
  
  .btn-large {
    padding: 1rem 1.5rem;
    font-size: 1rem;
  }
  
  .contact-form {
    padding: var(--spacing-md);
  }
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }