/* 
   DURA SHIELDING ENGINEERING - Core Stylesheet
   Theme: Industrial Premium Dark
   Colors: Charcoal/Slate, Safety Amber, Steel Blue
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Montserrat:wght@500;700;800&display=swap');

/* --- Custom Variables & Tokens --- */
:root {
  --color-bg-main: #0b0f19;       /* Deep slate black */
  --color-bg-card: #131c2e;       /* Metallic dark blue/grey */
  --color-bg-nav: rgba(11, 15, 25, 0.85);
  
  --color-text-primary: #f8fafc;   /* Off-white */
  --color-text-secondary: #94a3b8; /* Slate gray */
  --color-text-muted: #64748b;     /* Muted gray */
  
  --color-accent-amber: #f59e0b;  /* Safety Amber */
  --color-accent-blue: #38bdf8;   /* Steel Blue */
  --color-accent-hover: #d97706;  /* Darker amber for hover */
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(56, 189, 248, 0.15);
  
  --font-header: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
}

/* --- Layout Containers --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 8rem 0;
  position: relative;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-header);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
  position: relative;
}

.section-subtitle {
  font-family: var(--font-header);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent-amber);
  margin-bottom: 0.75rem;
  display: block;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-bottom: 4rem;
}

p {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

/* --- Buttons & Links --- */
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
  gap: 0.75rem;
}

.btn-primary {
  background-color: var(--color-accent-amber);
  color: #0b0f19;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-accent-blue);
  transform: translateY(-2px);
}

/* --- Header / Navigation --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--color-bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition-normal);
}

header.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-accent-amber) 0%, var(--color-accent-blue) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #0b0f19;
  font-size: 1.25rem;
  font-family: var(--font-header);
}

.logo-icon-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.logo-text {
  font-family: var(--font-header);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-text span {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-top: 2px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  position: relative;
  padding: 0.5rem 0;
}

nav a:hover, nav a.active {
  color: var(--color-text-primary);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent-amber);
  transition: var(--transition-fast);
}

nav a:hover::after, nav a.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 30px;
  height: 24px;
  position: relative;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  position: absolute;
  transition: var(--transition-fast);
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 11px; }
.menu-toggle span:nth-child(3) { top: 22px; }

.menu-toggle.active span:nth-child(1) {
  transform: translateY(11px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-11px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(circle at 75% 30%, rgba(56, 189, 248, 0.08) 0%, rgba(15, 23, 42, 0) 50%),
              radial-gradient(circle at 10% 80%, rgba(245, 158, 11, 0.05) 0%, rgba(15, 23, 42, 0) 40%),
              var(--color-bg-main);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(0deg, var(--color-bg-main) 0%, rgba(11, 15, 25, 0.3) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 50px;
  color: var(--color-accent-amber);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

.hero-badge i {
  font-size: 0.75rem;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 3rem;
  max-width: 650px;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
}

/* Floating Elements Animation */
.hero-graphic {
  position: absolute;
  top: 50%;
  right: 5%;
  transform: translateY(-50%);
  width: 450px;
  height: 450px;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.shield-outline {
  position: absolute;
  width: 320px;
  height: 380px;
  border: 2px solid rgba(56, 189, 248, 0.1);
  border-radius: 10px 10px 160px 160px;
  animation: shieldPulse 8s infinite alternate ease-in-out;
}

.shield-filled {
  position: absolute;
  width: 240px;
  height: 290px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(56, 189, 248, 0.05) 100%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px 10px 120px 120px;
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: floatAnim 6s infinite ease-in-out;
}

.shield-filled i {
  font-size: 6rem;
  color: rgba(245, 158, 11, 0.35);
  filter: drop-shadow(0 10px 15px rgba(0, 0, 0, 0.3));
}

@keyframes shieldPulse {
  0% {
    transform: scale(0.95) rotate(0deg);
    border-color: rgba(56, 189, 248, 0.1);
  }
  100% {
    transform: scale(1.05) rotate(3deg);
    border-color: rgba(245, 158, 11, 0.2);
  }
}

@keyframes floatAnim {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-15px) rotate(-1deg);
  }
}

/* --- About Section --- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 5rem;
  align-items: center;
}

.about-details p {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
}

.slogan-card {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(19, 28, 46, 0.5) 100%);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 12px;
  margin-top: 2rem;
}

.slogan-card h3 {
  font-size: 1.5rem;
  color: var(--color-accent-amber);
  margin-bottom: 0.5rem;
}

.slogan-word {
  font-weight: 800;
  letter-spacing: 0.05em;
  font-size: 1.25rem;
  display: inline-block;
  margin-right: 1.5rem;
  color: var(--color-text-primary);
}

.slogan-word:nth-child(2) {
  color: var(--color-accent-blue);
}

.slogan-word:nth-child(3) {
  color: var(--color-accent-amber);
}

.engineer-profile {
  background: var(--color-bg-card);
  border: 1px solid var(--border-color);
  padding: 3rem 2.5rem;
  border-radius: 16px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px -15px rgba(0, 0, 0, 0.3);
}

.engineer-profile::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent-amber), var(--color-accent-blue));
}

.avatar-wrapper {
  width: 110px;
  height: 110px;
  margin: 0 auto 1.5rem auto;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent-amber) 0%, var(--color-accent-blue) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3px;
  box-shadow: 0 10px 25px -5px rgba(0,0,0,0.4);
}

.avatar-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: var(--color-bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-inner i {
  font-size: 3rem;
  color: var(--color-accent-blue);
}

.engineer-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.engineer-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  display: block;
}

.engineer-meta {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  margin-top: 1.5rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.engineer-meta-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.engineer-meta-item i {
  font-size: 1.1rem;
  color: var(--color-accent-blue);
  width: 20px;
}

/* --- Services Section --- */
.services-tabs-container {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.services-tabs {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.tab-btn {
  background: none;
  border: none;
  font-family: var(--font-header);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0.75rem 1.5rem;
  position: relative;
  transition: var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--color-accent-amber);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -17px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--color-accent-amber);
}

.tab-content {
  display: none;
  animation: tabFadeIn 0.5s ease-in-out forwards;
}

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

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  background: linear-gradient(180deg, var(--color-bg-card) 0%, rgba(19, 28, 46, 0.4) 100%);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  transition: var(--transition-normal);
  box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 30px -10px rgba(0, 0, 0, 0.4);
  border-color: rgba(56, 189, 248, 0.3);
}

.service-icon-box {
  width: 60px;
  height: 60px;
  border-radius: 8px;
  background-color: rgba(56, 189, 248, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.75rem;
  transition: var(--transition-normal);
}

.service-card:hover .service-icon-box {
  background-color: var(--color-accent-amber);
}

.service-icon-box i {
  font-size: 1.75rem;
  color: var(--color-accent-blue);
  transition: var(--transition-normal);
}

.service-card:hover .service-icon-box i {
  color: #0b0f19;
}

.service-card h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  color: var(--color-text-primary);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.service-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.25rem;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.service-features li i {
  color: var(--color-accent-amber);
  font-size: 0.75rem;
}

/* --- Gallery Section --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

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

.gallery-item-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(0deg, rgba(11, 15, 25, 0.9) 0%, rgba(11, 15, 25, 0.3) 100%);
  opacity: 0;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
}

.gallery-item:hover img {
  transform: scale(1.08);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

.gallery-title {
  font-family: var(--font-header);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.gallery-category {
  font-size: 0.8rem;
  color: var(--color-accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* --- Lightbox Modal --- */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(11, 15, 25, 0.95);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  transition: opacity 0.30s ease-in-out;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content-wrapper {
  position: relative;
  max-width: 90%;
  max-height: 85%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 40px rgba(0,0,0,0.6);
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.lightbox.active .lightbox-img {
  opacity: 1;
  transform: scale(1);
}

.lightbox-caption {
  margin-top: 1rem;
  text-align: center;
  font-family: var(--font-header);
}

.lightbox-caption h4 {
  font-size: 1.25rem;
  color: var(--color-text-primary);
  margin-bottom: 0.25rem;
}

.lightbox-caption p {
  font-size: 0.9rem;
  color: var(--color-accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.lightbox-close:hover {
  color: var(--color-accent-amber);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--color-text-primary);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  font-size: 1.25rem;
}

.lightbox-nav:hover {
  background-color: var(--color-accent-amber);
  color: #0b0f19;
}

.lightbox-prev {
  left: -70px;
}

.lightbox-next {
  right: -70px;
}

/* --- Features Section --- */
.features-section {
  background-color: #0d1322;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 3rem;
}

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

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(56, 189, 248, 0.1) 100%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: var(--color-accent-amber);
  margin-bottom: 1.5rem;
  transition: var(--transition-normal);
}

.feature-item:hover .feature-icon {
  transform: rotateY(180deg);
  color: var(--color-accent-blue);
}

.feature-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

.feature-item p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

/* --- Contact Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem 1.75rem;
  border-radius: 10px;
  transition: var(--transition-normal);
}

.contact-card:hover {
  transform: translateX(5px);
  border-color: rgba(56, 189, 248, 0.25);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background-color: rgba(56, 189, 248, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-accent-blue);
  flex-shrink: 0;
  transition: var(--transition-normal);
}

.contact-card:hover .contact-card-icon {
  background-color: var(--color-accent-amber);
  color: #0b0f19;
}

.contact-card-details h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.contact-card-details p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.contact-card-action {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent-amber);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-form-wrapper {
  background-color: var(--color-bg-card);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: 16px;
  box-shadow: 0 10px 40px -15px rgba(0, 0, 0, 0.3);
}

.contact-form-wrapper h3 {
  font-size: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  background-color: rgba(11, 15, 25, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.875rem 1rem;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent-blue);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.05);
}

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

/* --- Footer --- */
footer {
  background-color: #080c14;
  border-top: 1px solid var(--border-color);
  padding: 5rem 0 2.5rem 0;
  font-size: 0.95rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-logo-desc p {
  margin-top: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 320px;
}

.footer-links h4, .footer-contact h4 {
  font-family: var(--font-header);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-accent-amber);
  transform: translateX(3px);
  display: inline-block;
}

.footer-contact-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: var(--color-text-secondary);
}

.footer-contact-details p {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.footer-contact-details i {
  color: var(--color-accent-blue);
  font-size: 1rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* --- Animations Engine (Reveal on Scroll) --- */
.reveal {
  opacity: 0;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.fade-in {
  transform: translateY(0);
}

.reveal.slide-up {
  transform: translateY(40px);
}

.reveal.slide-right {
  transform: translateX(-40px);
}

.reveal.scale-in {
  transform: scale(0.92);
}

.reveal.active {
  opacity: 1;
  transform: translate(0) scale(1);
}

/* Stagger delays */
.reveal.delay-1 { transition-delay: 0.15s; }
.reveal.delay-2 { transition-delay: 0.3s; }
.reveal.delay-3 { transition-delay: 0.45s; }
.reveal.delay-4 { transition-delay: 0.6s; }

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

@media (max-width: 1024px) {
  section {
    padding: 6rem 0;
  }
  
  .about-grid {
    gap: 3rem;
  }
  
  .contact-grid {
    gap: 3rem;
  }
  
  .lightbox-prev {
    left: -40px;
  }
  
  .lightbox-next {
    right: -40px;
  }
}

@media (max-width: 900px) {
  .nav-cta {
    display: none; /* Hide CTA buttons in mobile header */
  }
  
  .menu-toggle {
    display: block;
    z-index: 1001;
  }
  
  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: #0d1322;
    border-left: 1px solid var(--border-color);
    padding: 6rem 3rem;
    z-index: 1000;
    transition: var(--transition-normal);
  }
  
  nav.active {
    right: 0;
  }
  
  nav ul {
    flex-direction: column;
    gap: 2rem;
  }
  
  nav a {
    font-size: 1.15rem;
  }
  
  .hero {
    flex-direction: column;
    justify-content: center;
    padding-top: 100px;
    text-align: center;
  }
  
  .hero-content {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  .hero-description {
    margin-bottom: 2rem;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-graphic {
    position: relative;
    top: auto;
    right: auto;
    transform: none;
    margin-top: 3rem;
    width: 100%;
    height: 320px;
  }
  
  .shield-outline {
    width: 240px;
    height: 290px;
  }
  
  .shield-filled {
    width: 190px;
    height: 230px;
  }
  
  .shield-filled i {
    font-size: 4.5rem;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .engineer-profile {
    max-width: 450px;
    margin: 0 auto;
    width: 100%;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 1.25rem;
  }
  
  section {
    padding: 5rem 0;
  }
  
  .services-tabs {
    flex-wrap: wrap;
    gap: 0.5rem;
    border: none;
    padding-bottom: 0;
  }
  
  .tab-btn {
    width: calc(50% - 0.25rem);
    background-color: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.6rem 0.5rem;
    font-size: 0.85rem;
    text-align: center;
  }
  
  .tab-btn.active {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--color-accent-amber);
  }
  
  .tab-btn.active::after {
    display: none;
  }
  
  .contact-form-wrapper {
    padding: 2rem 1.5rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .lightbox-prev, .lightbox-next {
    display: none; /* Hide navigation buttons on touch screens */
  }
}