/*
 * CodeMiner Professional Website Stylesheet
 * Modern, Tech-Forward Design for Mining Technology Company
 */

/* ===================================
   CSS VARIABLES & DESIGN SYSTEM
   =================================== */
:root {
  /* Primary Colors */
  --primary-dark: #0a1628;
  --primary-light: #1e293b;

  /* Accent Colors */
  --accent-orange: #ff6b35;
  --accent-amber: #f59e0b;
  --accent-cyan: #00d4ff;

  /* Neutral Colors */
  --neutral-dark: #334155;
  --neutral-medium: #64748b;

  /* Text Colors */
  --text-white: #ffffff;
  --text-light: #e2e8f0;
  --text-muted: #94a3b8;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Typography */
  --font-heading: "Montserrat", sans-serif;
  --font-body: "Inter", sans-serif;

  /* Transitions */
  --transition: 0.3s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(255, 107, 53, 0.5);
}

/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

/* Skip to Main Content (Accessibility) */
.skip-to-main {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--accent-orange);
  color: var(--text-white);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
}

.skip-to-main:focus {
  top: 0;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-white);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: var(--transition);
}

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

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

/* Section Title */
.section-title {
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-title.center {
  display: block;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.125rem;
  color: var(--text-muted);
}

/* Glass Effect */
.glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
}

/* ===================================
   NAVIGATION
   =================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  padding: var(--spacing-sm) 0;
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-white);
  font-family: var(--font-heading);
}

.logo-img {
  height: 40px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
}

.logo-text {
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  color: var(--text-light);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-orange);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
  color: var(--text-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 0.5rem;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger:hover {
  background: rgba(255, 107, 53, 0.1);
  border-radius: var(--radius-sm);
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-white);
  border-radius: 3px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.video-background iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 100vh;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

@media (min-aspect-ratio: 16/9) {
  .video-background iframe {
    height: 56.25vw;
  }
}

@media (max-aspect-ratio: 16/9) {
  .video-background iframe {
    width: 177.78vh;
  }
}

.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(10, 22, 40, 0.85),
    rgba(30, 41, 59, 0.7)
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
}

.hero-title {
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  margin-bottom: var(--spacing-lg);
  color: var(--text-light);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA Button */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  background: linear-gradient(
    135deg,
    var(--accent-orange),
    var(--accent-amber)
  );
  color: var(--text-white);
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(255, 107, 53, 0.6);
}

.cta-button:hover::before {
  left: 100%;
}

.cta-button .arrow {
  transition: var(--transition);
}

.cta-button:hover .arrow {
  transform: translateX(5px);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.mouse {
  width: 30px;
  height: 50px;
  border: 2px solid var(--text-light);
  border-radius: 15px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.wheel {
  width: 4px;
  height: 8px;
  background: var(--text-light);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

/* ===================================
   ABOUT SECTION
   =================================== */
.about {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(
    180deg,
    var(--primary-dark),
    var(--primary-light)
  );
  position: relative;
}

.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
      90deg,
      rgba(255, 107, 53, 0.05) 1px,
      transparent 1px
    ),
    linear-gradient(rgba(255, 107, 53, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 0.3;
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-content {
  position: relative;
  z-index: 1;
}

.about-text p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

/* Statistics */
.stats-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 107, 53, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-orange);
  box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent-orange);
  font-family: var(--font-heading);
  display: inline-block;
}

.stat-symbol {
  font-size: 2rem;
  color: var(--accent-cyan);
  display: inline-block;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===================================
   SERVICES SECTION
   =================================== */
.services {
  padding: var(--spacing-xl) 0;
  background: var(--primary-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.service-card {
  padding: var(--spacing-md);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 107, 53, 0.1),
    rgba(0, 212, 255, 0.1)
  );
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-10px);
  border-color: var(--accent-orange);
  box-shadow: 0 10px 30px rgba(255, 107, 53, 0.3);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.service-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0) invert(1);
  transition: var(--transition);
}

.service-card:hover .service-icon img {
  filter: brightness(0) invert(1) drop-shadow(0 0 10px var(--accent-orange));
  transform: scale(1.1);
}

.icon-placeholder {
  font-size: 3.5rem;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 10px rgba(255, 107, 53, 0.3));
  transition: var(--transition);
}

.service-card:hover .icon-placeholder {
  transform: scale(1.1) rotate(5deg);
  filter: drop-shadow(0 0 20px rgba(255, 107, 53, 0.6));
}

.service-title {
  text-align: center;
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
  font-size: 1.5rem;
}

.service-description {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.6;
  position: relative;
  z-index: 1;
  margin-bottom: var(--spacing-sm);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-orange);
  font-weight: 500;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.service-link:hover {
  color: var(--accent-cyan);
  transform: translateX(5px);
}

/* ===================================
   COMPANIES SECTION
   =================================== */
.companies {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(
    180deg,
    var(--primary-light),
    var(--primary-dark)
  );
}

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

.company-card {
  padding: var(--spacing-lg);
  transition: var(--transition);
  position: relative;
}

.company-card[data-company="mechanix"] {
  border-color: var(--accent-orange);
}

.company-card[data-company="sim"] {
  border-color: var(--accent-cyan);
}

.company-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(255, 107, 53, 0.3);
}

.company-card[data-company="mechanix"]:hover {
  box-shadow: 0 15px 40px rgba(255, 107, 53, 0.4);
}

.company-card[data-company="sim"]:hover {
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

.company-header {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.company-logo {
  height: 60px;
  width: auto;
  max-width: 200px;
  margin: 0 auto;
  object-fit: contain;
}

.company-logo-text {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.company-card[data-company="mechanix"] .company-logo-text {
  background: linear-gradient(
    135deg,
    var(--accent-orange),
    var(--accent-amber)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.company-card[data-company="sim"] .company-logo-text {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-amber));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.company-description {
  text-align: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.company-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(5px);
}

.check-icon {
  color: var(--accent-orange);
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.company-card[data-company="sim"] .check-icon {
  color: var(--accent-cyan);
}

/* ===================================
   VIDEO SHOWCASE SECTION
   =================================== */
.video-showcase {
  padding: var(--spacing-xl) 0;
  background: var(--primary-dark);
}

.video-wrapper {
  max-width: 900px;
  margin: var(--spacing-lg) auto 0;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 3px solid var(--accent-orange);
  box-shadow: 0 0 40px rgba(255, 107, 53, 0.4);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ===================================
   ACHIEVEMENTS SECTION
   =================================== */
.achievements {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(
    180deg,
    var(--primary-dark),
    var(--primary-light)
  );
}

.achievements-timeline {
  margin-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.achievement-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--spacing-md);
  align-items: start;
  position: relative;
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-orange);
  transition: var(--transition);
}

.achievement-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(10px);
  border-left-color: var(--accent-cyan);
}

.achievement-number {
  font-size: 4rem;
  font-weight: 700;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.achievement-content h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-white);
  font-size: 1.5rem;
}

.achievement-content p {
  color: var(--text-muted);
  line-height: 1.8;
}

/* ===================================
   CTA BANNER SECTION
   =================================== */
.cta-banner {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(
    135deg,
    var(--primary-light),
    var(--accent-orange)
  );
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(0, 212, 255, 0.2) 0%,
    transparent 70%
  );
  animation: rotate 20s linear infinite;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-content h2 {
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.cta-content p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ===================================
   CONTACT SECTION
   =================================== */
.contact {
  padding: var(--spacing-xl) 0;
  background: var(--primary-light);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

/* Contact Form */
.contact-form-wrapper {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-light);
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
  min-height: 44px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-orange);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 15px rgba(255, 107, 53, 0.3);
}

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

.submit-button {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(
    135deg,
    var(--accent-orange),
    var(--accent-amber)
  );
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.submit-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.5);
}

/* Contact Info */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.info-card {
  padding: var(--spacing-md);
  text-align: center;
}

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

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

.info-card p {
  color: var(--text-muted);
  margin-bottom: 0;
}

.info-card a {
  color: var(--accent-cyan);
}

.info-card a:hover {
  color: var(--accent-orange);
}

/* Map Container */
.map-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.1);
  height: 300px;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  display: block;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
  background: var(--primary-dark);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

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

.footer-logo img {
  height: 40px;
  width: auto;
}

.footer-description {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-col h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  color: var(--accent-orange);
}

.footer-links,
.footer-contact {
  list-style: none;
}

.footer-links li,
.footer-contact li {
  margin-bottom: 0.5rem;
}

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

.footer-links a:hover {
  color: var(--accent-orange);
  padding-left: 5px;
}

.footer-contact {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Social Media */
.footer-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.social-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  color: var(--text-light);
  transition: var(--transition);
}

.social-icon:hover {
  background: var(--accent-orange);
  color: var(--text-white);
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(255, 107, 53, 0.4);
}

/* Footer Bottom */
.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.back-to-top {
  width: 40px;
  height: 40px;
  background: var(--accent-orange);
  color: var(--text-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(255, 107, 53, 0.5);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

/* Tablet (768px and below) */
@media (max-width: 768px) {
  /* Navigation */
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(10px);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
    padding: var(--spacing-md) 0;
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  /* About Section */
  .about-grid {
    grid-template-columns: 1fr;
  }

  .stats-container {
    grid-template-columns: 1fr;
  }

  /* Services */
  .services-grid {
    grid-template-columns: 1fr;
  }

  /* Companies */
  .companies-grid {
    grid-template-columns: 1fr;
  }

  /* Achievements */
  .achievement-item {
    grid-template-columns: 60px 1fr;
  }

  .achievement-number {
    font-size: 2.5rem;
  }

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

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .cta-button {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    min-height: 44px;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .achievement-item {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .achievement-number {
    font-size: 3rem;
  }
  
  .service-card {
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .company-card {
    padding: var(--spacing-md) var(--spacing-sm);
  }
}

/* Touch device improvements */
@media (hover: none) and (pointer: coarse) {
  .nav-link,
  .cta-button,
  .submit-button,
  .social-icon,
  .back-to-top {
    min-height: 44px;
    min-width: 44px;
  }
  
  .service-card,
  .company-card {
    cursor: pointer;
  }
  
  .service-card:active,
  .company-card:active {
    transform: scale(0.98);
.fade-in-up:nth-child(3) {
  animation-delay: 0.6s;
}