/* ============================================
   Architectural Studio - Steel & Copper Theme
   Primary: #2C3E50 (Steel Blue)
   Secondary: #E67E22 (Copper Orange)
   ============================================ */

/* ============================================
   CSS Variables & Root Settings
   ============================================ */
:root {
  --primary-color: #2C3E50;
  --primary-dark: #1a252f;
  --primary-light: #34495e;
  --secondary-color: #E67E22;
  --secondary-dark: #d35400;
  --secondary-light: #f39c12;
  --accent-copper: #b87333;
  --steel-gray: #95a5a6;
  --light-gray: #ecf0f1;
  --white: #ffffff;
  --black: #000000;
  --text-dark: #2c3e50;
  --text-light: #7f8c8d;
  --border-color: #bdc3c7;
  --shadow-sm: 0 2px 4px rgba(44, 62, 80, 0.1);
  --shadow-md: 0 4px 6px rgba(44, 62, 80, 0.15);
  --shadow-lg: 0 10px 20px rgba(44, 62, 80, 0.2);
  --shadow-xl: 0 20px 40px rgba(44, 62, 80, 0.25);
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 2px;
  --border-radius-lg: 4px;
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;
  --container-max: 1320px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
}

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

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

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

a {
  color: var(--secondary-color);
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-ease);
}

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

a:focus {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

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

/* ============================================
   Bootstrap 5 Overrides
   ============================================ */
.container {
  max-width: var(--container-max);
}

.btn {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.875rem 2rem;
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  transition: all var(--transition-speed) var(--transition-ease);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn:focus {
  box-shadow: 0 0 0 0.25rem rgba(230, 126, 34, 0.25);
}

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

.btn-primary:hover {
  background-color: var(--secondary-dark);
  border-color: var(--secondary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  background-color: var(--secondary-dark);
  border-color: var(--secondary-dark);
  transform: translateY(0);
}

.btn-outline-primary {
  background-color: transparent;
  border-color: var(--secondary-color);
  color: var(--secondary-color);
}

.btn-outline-primary:hover {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary:active {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-outline-secondary {
  background-color: transparent;
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.btn-outline-secondary:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: var(--white);
}

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

.btn-sm {
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
}

.form-control {
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 0.875rem 1rem;
  font-size: 1rem;
  transition: all var(--transition-speed) var(--transition-ease);
  color: var(--text-dark);
}

.form-control:focus {
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 0.25rem rgba(230, 126, 34, 0.15);
  outline: 0;
}

.form-control.is-invalid {
  border-color: #dc3545;
}

.form-control.is-valid {
  border-color: #198754;
}

.form-label {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.invalid-feedback {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.valid-feedback {
  color: #198754;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  transition: all var(--transition-speed) var(--transition-ease);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: var(--shadow-md);
}

.navbar-brand {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.02em;
  transition: color var(--transition-speed) var(--transition-ease);
}

.navbar-brand:hover {
  color: var(--secondary-color);
}

.navbar-brand span {
  color: var(--secondary-color);
}

.navbar-nav {
  align-items: center;
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  position: relative;
  transition: color var(--transition-speed) var(--transition-ease);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  transition: width var(--transition-speed) var(--transition-ease);
}

.nav-link:hover {
  color: var(--secondary-color);
}

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

.nav-link.active {
  color: var(--secondary-color);
}

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

.navbar-toggler {
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
  padding: 0.5rem 0.75rem;
  transition: all var(--transition-speed) var(--transition-ease);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem rgba(44, 62, 80, 0.15);
  outline: 0;
}

.navbar-toggler:hover {
  background-color: var(--primary-color);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%232C3E50' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  transition: all var(--transition-speed) var(--transition-ease);
}

.navbar-toggler:hover .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23ffffff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" xmlns="http://www.w3.org/2000/svg"/%3E%3Cg%3E%3Cline x1="0" y1="0" x2="100" y2="100" stroke="%23E67E22" stroke-width="0.5" opacity="0.1"/%3E%3Cline x1="100" y1="0" x2="0" y2="100" stroke="%23E67E22" stroke-width="0.5" opacity="0.1"/%3E%3C/g%3E%3C/svg%3E');
  opacity: 0.3;
  animation: patternMove 20s linear infinite;
}

@keyframes patternMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(100px, 100px);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: 2rem;
}

.hero-content h1 {
  color: var(--white);
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s var(--transition-ease);
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--light-gray);
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s var(--transition-ease) 0.2s backwards;
}

.hero-content .btn {
  margin: 0.5rem;
  animation: fadeInUp 1s var(--transition-ease) 0.4s backwards;
}

.hero-accent {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--secondary-color) 0%, transparent 70%);
  opacity: 0.15;
  animation: float 6s ease-in-out infinite;
}

.hero-accent:nth-child(1) {
  top: 10%;
  left: 5%;
}

.hero-accent:nth-child(2) {
  bottom: 15%;
  right: 10%;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-30px) scale(1.1);
  }
}

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

/* ============================================
   Section Styles
   ============================================ */
section {
  padding: 5rem 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title h2 {
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(to right, var(--secondary-color), var(--accent-copper));
}

.section-title p {
  font-size: 1.125rem;
  max-width: 700px;
  margin: 1.5rem auto 0;
}

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

/* ============================================
   Cards & Project Grid
   ============================================ */
.card {
  border: none;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-speed) var(--transition-ease);
  box-shadow: var(--shadow-sm);
  height: 100%;
}

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

.card-img-top {
  height: 250px;
  object-fit: cover;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.card:hover .card-img-top {
  transform: scale(1.1);
}

.card-img-wrapper {
  overflow: hidden;
  position: relative;
  background-color: var(--primary-color);
}

.card-img-overlay-custom {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 0%, rgba(44, 62, 80, 0.9) 100%);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity var(--transition-speed) var(--transition-ease);
}

.card:hover .card-img-overlay-custom {
  opacity: 1;
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  font-family: var(--font-heading);
}

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

.card-footer {
  background-color: transparent;
  border-top: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
}

/* Project Grid Specific */
.project-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  height: 400px;
}

.project-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--transition-ease);
}

.project-card:hover .project-card-img {
  transform: scale(1.15);
}

.project-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(44, 62, 80, 0.95) 0%, rgba(44, 62, 80, 0.4) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  opacity: 0;
  transition: opacity var(--transition-speed) var(--transition-ease);
}

.project-card:hover .project-card-overlay {
  opacity: 1;
}

.project-card-title {
  color: var(--white);
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  transform: translateY(20px);
  transition: transform var(--transition-speed) var(--transition-ease);
}

.project-card:hover .project-card-title {
  transform: translateY(0);
}

.project-card-category {
  color: var(--secondary-color);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  transform: translateY(20px);
  transition: transform var(--transition-speed) var(--transition-ease) 0.1s;
}

.project-card:hover .project-card-category {
  transform: translateY(0);
}

/* ============================================
   Services Section
   ============================================ */
.service-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 2rem;
  color: var(--white);
  transition: all var(--transition-speed) var(--transition-ease);
  box-shadow: var(--shadow-md);
}

.service-card:hover .service-icon {
  transform: rotateY(360deg);
  box-shadow: var(--shadow-lg);
}

.service-card {
  text-align: center;
  padding: 2rem;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* ============================================
   Statistics/Counter Section
   ============================================ */
.stats-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M30 0L60 30L30 60L0 30Z" fill="%23E67E22" opacity="0.05"/%3E%3C/svg%3E');
  opacity: 0.5;
}

.stat-item {
  text-align: center;
  padding: 2rem 1rem;
  position: relative;
  z-index: 1;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  font-family: var(--font-heading);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1.125rem;
  color: var(--light-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 500;
}

/* ============================================
   Testimonials
   ============================================ */
.testimonial-card {
  background-color: var(--white);
  padding: 2.5rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  margin-bottom: 2rem;
  transition: transform var(--transition-speed) var(--transition-ease);
}

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

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 1rem;
  left: 1.5rem;
  font-size: 5rem;
  color: var(--secondary-color);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-text {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--secondary-color);
}

.testimonial-info h5 {
  margin-bottom: 0.25rem;
  color: var(--primary-color);
  font-size: 1.125rem;
}

.testimonial-info p {
  margin-bottom: 0;
  color: var(--text-light);
  font-size: 0.875rem;
}

/* ============================================
   Contact Form
   ============================================ */
.contact-section {
  position: relative;
}

.contact-info {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: 3rem;
  border-radius: var(--border-radius-lg);
  height: 100%;
}

.contact-info h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2rem;
  gap: 1rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--secondary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.contact-details h5 {
  color: var(--white);
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.contact-details p {
  color: var(--light-gray);
  margin-bottom: 0;
}

.contact-details a {
  color: var(--secondary-color);
  transition: color var(--transition-speed) var(--transition-ease);
}

.contact-details a:hover {
  color: var(--secondary-light);
}

.contact-form {
  background-color: var(--white);
  padding: 3rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.contact-form h3 {
  margin-bottom: 1.5rem;
}

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

textarea.form-control {
  resize: vertical;
  min-height: 150px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--primary-color);
  color: var(--light-gray);
  padding: 4rem 0 0;
}

.footer h5 {
  color: var(--white);
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  font-family: var(--font-heading);
}

.footer p {
  color: var(--steel-gray);
  line-height: 1.8;
}

.footer a {
  color: var(--steel-gray);
  transition: color var(--transition-speed) var(--transition-ease);
}

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

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  display: inline-block;
  transition: all var(--transition-speed) var(--transition-ease);
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-link {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  transition: all var(--transition-speed) var(--transition-ease);
}

.social-link:hover {
  background-color: var(--secondary-color);
  color: var(--white);
  transform: translateY(-5px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 3rem;
  padding: 2rem 0;
  text-align: center;
}

.footer-bottom p {
  margin-bottom: 0;
  color: var(--steel-gray);
}

/* ============================================
   Scroll to Top Button
   ============================================ */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--secondary-color);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-speed) var(--transition-ease);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  border: none;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  background-color: var(--secondary-dark);
  transform: translateY(-5px);
}

/* ============================================
   Loading Spinner
   ============================================ */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--light-gray);
  border-top-color: var(--secondary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   Utilities
   ============================================ */
.bg-primary-custom {
  background-color: var(--primary-color);
}

.bg-secondary-custom {
  background-color: var(--secondary-color);
}

.text-primary-custom {
  color: var(--primary-color);
}

.text-secondary-custom {
  color: var(--secondary-color);
}

.text-copper {
  color: var(--accent-copper);
}

.border-primary-custom {
  border-color: var(--primary-color);
}

.border-secondary-custom {
  border-color: var(--secondary-color);
}

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

.divider {
  width: 100px;
  height: 3px;
  background: linear-gradient(to right, var(--secondary-color), var(--accent-copper));
  margin: 2rem auto;
}

.accent-line {
  width: 60px;
  height: 3px;
  background-color: var(--secondary-color);
  margin-bottom: 1rem;
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  animation: fadeIn 1s var(--transition-ease);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.slide-in-left {
  animation: slideInLeft 0.8s var(--transition-ease);
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-right {
  animation: slideInRight 0.8s var(--transition-ease);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.scale-in {
  animation: scaleIn 0.6s var(--transition-ease);
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Intersection Observer Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--transition-ease), transform 0.8s var(--transition-ease);
}

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

/* ============================================
   Responsive Design - Mobile First
   ============================================ */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
  
  section {
    padding: 6rem 0;
  }
  
  .hero-content h1 {
    font-size: 3.5rem;
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
  
  .navbar-expand-lg .navbar-nav {
    gap: 0.5rem;
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* XXL devices (larger desktops, 1400px and up) */
@media (min-width: 1400px) {
  .container {
    max-width: var(--container-max);
  }
}

/* Mobile Specific Styles */
@media (max-width: 767px) {
  .hero {
    min-height: 70vh;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .hero-content p {
    font-size: 1rem;
  }
  
  section {
    padding: 3rem 0;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
  
  .contact-info,
  .contact-form {
    padding: 2rem;
  }
  
  .footer {
    padding: 3rem 0 0;
  }
  
  .project-card {
    height: 300px;
  }
  
  .testimonial-card {
    padding: 1.5rem;
  }
  
  .scroll-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 45px;
    height: 45px;
  }
  
  .navbar-collapse {
    background-color: var(--white);
    padding: 1rem;
    margin-top: 1rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
  }
  
  .nav-link {
    padding: 0.75rem 1rem;
  }
  
  .nav-link::after {
    display: none;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .hero,
  .scroll-to-top,
  .footer {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
  }
  
  a {
    text-decoration: underline;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #000000;
    --secondary-color: #ff6600;
    --text-light: #333333;
  }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
  /* Uncomment to enable dark mode
  :root {
    --primary-color: #3d5a80;
    --white: #1a1a1a;
    --text-dark: #e0e0e0;
    --light-gray: #2d2d2d;
    --border-color: #404040;
  }
  
  body {
    background-color: #1a1a1a;
  }
  */
}