/* ============================================================
   Microtech Rollers Pvt. Ltd. — Design System & Styles
   Phase 1: HTML5 + Responsive CSS | Phase 2: Modern UX/UI
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Colors */
  --color-primary: #1a3a8f;
  --color-primary-dark: #0f2460;
  --color-primary-light: #2752b3;
  --color-accent: #e8792b;
  --color-accent-hover: #d4691a;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-error: #dc2626;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: var(--font-sans);
  --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --fs-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --fs-md: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --fs-lg: clamp(1.375rem, 1.15rem + 1vw, 2rem);
  --fs-xl: clamp(1.75rem, 1.3rem + 2vw, 3rem);
  --fs-2xl: clamp(2rem, 1.4rem + 3vw, 4rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

/* ---------- Utility Classes ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--color-bg-dark);
  color: #fff;
}

.section-title {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-primary-dark);
}

.section-dark .section-title {
  color: #fff;
}

.section-subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
}

.section-dark .section-subtitle {
  color: rgba(255,255,255,0.7);
}

/* ---------- Skip Link (Accessibility) ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 10000;
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
  color: #fff;
}

/* ---------- Header & Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

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

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: var(--fs-md);
  color: var(--color-primary-dark);
  text-decoration: none;
  z-index: 1001;
}

.logo img {
  height: 48px;
  width: auto;
}

.logo span {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo .logo-sub {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Desktop Navigation */
.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(26, 58, 143, 0.06);
}

.nav-link.active {
  color: #fff;
  background: var(--color-primary);
}

.nav-link.active:hover {
  color: #fff;
  background: var(--color-primary-dark);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* ---------- Hero Section ---------- */
.hero {
  padding-top: calc(var(--header-height) + var(--space-3xl));
  padding-bottom: var(--space-3xl);
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(232,121,43,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
  border-radius: 50%;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content h1 {
  font-size: var(--fs-2xl);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-lg);
}

.hero-content .hero-accent {
  color: var(--color-accent);
}

.hero-content p {
  font-size: var(--fs-md);
  opacity: 0.9;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(232,121,43,0.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(26,58,143,0.4);
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  padding: var(--space-2xl) 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.stat-item h3 {
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}

.stat-item p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ---------- About Section ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-image img {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.about-content h2 {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-md);
}

.about-content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

/* ---------- Products Section ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-card-body {
  padding: var(--space-lg);
}

.product-card h3 {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-sm);
}

.product-card p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ---------- Certifications Bar ---------- */
.cert-bar {
  padding: var(--space-2xl) 0;
  background: #fff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cert-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
}

.cert-item {
  text-align: center;
  padding: var(--space-lg);
}

.cert-badge {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-sm);
  color: #fff;
  font-weight: 800;
  font-size: var(--fs-xs);
}

.cert-item p {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
}

/* ---------- Clients Section ---------- */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-xl);
  align-items: center;
}

.client-logo {
  background: #fff;
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  min-height: 100px;
}

.client-logo:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.client-logo img {
  max-height: 50px;
  width: auto;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: all var(--transition-base);
}

.client-logo:hover img {
  filter: grayscale(0);
  opacity: 1;
}

/* ---------- CTA Section ---------- */
.cta-section {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.cta-section p {
  font-size: var(--fs-md);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* ---------- Page Header (Inner Pages) ---------- */
.page-header {
  padding-top: calc(var(--header-height) + var(--space-2xl));
  padding-bottom: var(--space-2xl);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  text-align: center;
}

.page-header h1 {
  font-size: var(--fs-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.page-header p {
  font-size: var(--fs-md);
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Tabs (Modern) ---------- */
.tabs-container {
  padding: var(--space-2xl) 0;
}

.tab-nav {
  display: flex;
  gap: var(--space-xs);
  border-bottom: 2px solid var(--color-border);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--color-primary);
}

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel {
  display: none;
  animation: fadeIn var(--transition-base);
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Content Cards ---------- */
.content-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

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

/* ---------- Image Gallery (Awards) ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform var(--transition-base);
}

/* Zoom overlay on hover */
.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
  pointer-events: none;
}

.gallery-item:hover::after {
  background: rgba(15, 23, 42, 0.25);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

/* ---------- Lightbox Modal ---------- */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms ease, visibility 300ms ease;
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-container {
  position: relative;
  max-width: 92vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-image {
  max-width: 100%;
  max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 300ms ease;
}

.lightbox-overlay.active .lightbox-image {
  transform: scale(1);
}

.lightbox-close {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 10000;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: rotate(90deg);
}

.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10000;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.22);
}

.lightbox-prev {
  left: var(--space-lg);
}

.lightbox-prev:hover {
  transform: translateY(-50%) translateX(-3px);
}

.lightbox-next {
  right: var(--space-lg);
}

.lightbox-next:hover {
  transform: translateY(-50%) translateX(3px);
}

.lightbox-caption {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-sm);
  text-align: center;
  max-width: 600px;
  padding: var(--space-sm) var(--space-lg);
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-md);
}

.lightbox-counter {
  position: fixed;
  top: var(--space-lg);
  left: var(--space-lg);
  z-index: 10000;
  color: rgba(255, 255, 255, 0.6);
  font-size: var(--fs-xs);
  font-weight: 600;
}

@media (max-width: 768px) {
  .lightbox-nav {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .lightbox-prev {
    left: var(--space-sm);
  }

  .lightbox-next {
    right: var(--space-sm);
  }

  .lightbox-close {
    width: 40px;
    height: 40px;
    top: var(--space-md);
    right: var(--space-md);
  }

  .lightbox-counter {
    top: var(--space-md);
    left: var(--space-md);
  }
}

/* ---------- Contact Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-2xl);
  align-items: start;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.form-group label .required {
  color: var(--color-error);
}

.form-control {
  width: 100%;
  padding: 0.7rem 1rem;
  font-size: var(--fs-sm);
  font-family: var(--font-sans);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(26,58,143,0.1);
}

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

.form-error {
  font-size: var(--fs-xs);
  color: var(--color-error);
  margin-top: var(--space-xs);
  display: none;
}

.form-group.error .form-control {
  border-color: var(--color-error);
}

.form-group.error .form-error {
  display: block;
}

/* Contact Info Sidebar */
.contact-info-card {
  background: var(--color-bg-dark);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.contact-info-card h3 {
  font-size: var(--fs-md);
  margin-bottom: var(--space-lg);
}

.contact-detail {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  align-items: flex-start;
}

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--fs-md);
}

.contact-detail p {
  font-size: var(--fs-sm);
  line-height: 1.5;
  opacity: 0.9;
}

.contact-detail a {
  color: var(--color-accent);
}

/* ---------- Infrastructure Cards ---------- */
.infra-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.infra-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.infra-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.infra-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.infra-card-body {
  padding: var(--space-lg);
}

.infra-card h3 {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-sm);
}

.infra-card ul {
  padding-left: var(--space-lg);
}

.infra-card li {
  list-style: disc;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

/* ---------- Quality List ---------- */
.quality-list {
  padding-left: 0;
}

.quality-list li {
  position: relative;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.quality-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer h4 {
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer p, .footer li a {
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
}

.footer li a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
  text-align: center;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.4);
}

/* ---------- Scroll Animations ---------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive Breakpoints ---------- */

/* Tablet */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .infra-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-lg) var(--space-xl);
    box-shadow: var(--shadow-lg);
    transition: right var(--transition-base);
    gap: 0;
  }

  .nav-list.open {
    right: 0;
  }

  .nav-link {
    padding: var(--space-md);
    border-radius: var(--radius-sm);
  }

  .hero-content h1 {
    font-size: var(--fs-xl);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .products-grid,
  .infra-grid {
    grid-template-columns: 1fr;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .content-grid-2 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .clients-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
  }
}