/* ==========================================
   ATELIER D'ARCHITECTURE MODERNE - STYLESHEET
   Minimalist Black & White Design
   ========================================== */

/* ==========================================
   1. CSS VARIABLES
   ========================================== */
:root {
  /* Colors - Client Palette */
  --primary: #212121;
  --secondary: #FAFAFA;
  --accent: #00BCD4;

  /* Color Derivatives */
  --primary-light: #424242;
  --primary-dark: #000000;
  --accent-light: #4DD0E1;
  --accent-dark: #00838F;

  /* Neutral System */
  --white: #FFFFFF;
  --black: #000000;
  --gray-100: #F5F5F5;
  --gray-200: #EEEEEE;
  --gray-300: #E0E0E0;
  --gray-400: #BDBDBD;
  --gray-500: #9E9E9E;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;

  /* Semantic Colors */
  --success: #00E676;
  --error: #FF1744;
  --warning: #FFC107;

  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-display: 'Playfair Display', serif;

  /* Spacing System (8px base) */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Z-index Scale */
  --z-below: -1;
  --z-normal: 1;
  --z-above: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* ==========================================
   2. RESET & BASE
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.6;
  color: var(--primary);
  background-color: var(--white);
  overflow-x: hidden;
}

/* ==========================================
   3. TYPOGRAPHY
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--primary);
}

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

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

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

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-sm);
  font-size: 1rem;
  line-height: 1.75;
}

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

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

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

ul, ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
}

/* ==========================================
   4. UTILITIES
   ========================================== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--white);
  padding: var(--space-sm);
  z-index: var(--z-tooltip);
}

.skip-link:focus {
  top: 0;
}

/* Section Utilities */
section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
}

.section-number {
  display: inline-block;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray-600);
}

/* ==========================================
   5. BUTTONS
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: 0;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transition: left var(--transition-base);
  z-index: var(--z-below);
}

.btn:hover::before {
  left: 0;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  border: 2px solid var(--primary);
}

.btn-primary:hover {
  color: var(--white);
  border-color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  color: var(--white);
  border-color: var(--accent);
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: 1.125rem;
}

.btn i {
  position: relative;
  z-index: var(--z-normal);
}

/* ==========================================
   6. HEADER & NAVIGATION
   ========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  position: relative;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  z-index: var(--z-above);
}

.logo-text {
  position: relative;
}

.logo-text::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-logo:hover .logo-text::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  z-index: var(--z-above);
}

.hamburger {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: all var(--transition-base);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

.nav-toggle.active .hamburger {
  background: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg);
  bottom: 0;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary);
  position: relative;
  padding: var(--space-xs) 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

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

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

.nav-lang {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.lang-btn {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-500);
  transition: color var(--transition-fast);
}

.lang-btn.active {
  color: var(--primary);
}

.lang-btn:hover {
  color: var(--accent);
}

.lang-divider {
  color: var(--gray-300);
}

/* ==========================================
   7. HERO SECTION
   ========================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  overflow: hidden;
}

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

.hero-text {
  animation: fadeInUp 1s ease;
}

.hero-title {
  margin-bottom: var(--space-md);
}

.title-line {
  display: block;
  overflow: hidden;
}

.title-line::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--accent);
  margin-top: var(--space-sm);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: var(--space-xl);
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-lg);
  animation: fadeInUp 1s ease 0.3s backwards;
}

.stat-item {
  text-align: center;
  padding: var(--space-md);
  border: 1px solid var(--gray-200);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-image {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  z-index: var(--z-below);
}

.hero-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, var(--white) 0%, transparent 50%);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(20%);
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  animation: bounce 2s infinite;
}

.scroll-text {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--gray-600);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--gray-400);
}

/* ==========================================
   8. PROJECTS SECTION
   ========================================== */
.projects {
  background: var(--gray-100);
}

.projects-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-xs) var(--space-md);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--white);
  border: 1px solid var(--gray-300);
  transition: all var(--transition-fast);
}

.filter-btn.active,
.filter-btn:hover {
  color: var(--white);
  background: var(--primary);
  border-color: var(--primary);
}

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

.project-card {
  position: relative;
  overflow: hidden;
  background: var(--white);
  transition: transform var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
}

.project-image {
  position: relative;
  height: 400px;
  overflow: hidden;
}

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

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

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
  color: var(--white);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-category {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.project-title {
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: var(--space-xs);
}

.project-location {
  font-size: 0.9375rem;
  color: var(--gray-300);
  margin-bottom: var(--space-md);
}

.project-details-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--white);
  font-weight: 600;
  transition: gap var(--transition-fast);
}

.project-details-btn:hover {
  gap: var(--space-sm);
}

/* ==========================================
   9. EXPERTISE SECTION
   ========================================== */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.expertise-card {
  padding: var(--space-xl);
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.expertise-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(0, 188, 212, 0.1);
}

.expertise-card-highlight {
  background: var(--primary);
  color: var(--white);
}

.expertise-card-highlight .expertise-title,
.expertise-card-highlight .expertise-description {
  color: var(--white);
}

.expertise-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--accent);
  border: 2px solid var(--accent);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.expertise-card:hover .expertise-icon {
  transform: scale(1.1) rotate(5deg);
}

.expertise-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.expertise-description {
  color: var(--gray-600);
  margin-bottom: var(--space-md);
}

.expertise-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.expertise-features li {
  position: relative;
  padding-left: var(--space-md);
  font-size: 0.9375rem;
  color: var(--gray-600);
}

.expertise-features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.expertise-card-highlight .expertise-features li {
  color: var(--gray-300);
}

/* ==========================================
   10. PROCESS SECTION
   ========================================== */
.process {
  background: var(--gray-100);
}

.process-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
}

.process-step {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.process-step-reverse {
  grid-template-columns: 80px 1fr 1fr;
}

.process-step-reverse .process-content {
  order: 2;
}

.process-step-reverse .process-visual {
  order: 1;
}

.process-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
}

.process-content {
  padding: var(--space-xl);
  background: var(--white);
}

.process-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
}

.process-description {
  color: var(--gray-600);
  margin-bottom: var(--space-md);
}

.process-deliverables {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.process-deliverables li {
  position: relative;
  padding-left: var(--space-md);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent);
}

.process-deliverables li::before {
  content: '✓';
  position: absolute;
  left: 0;
}

.process-visual {
  height: 300px;
  overflow: hidden;
}

.process-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(30%);
  transition: all var(--transition-slow);
}

.process-visual:hover img {
  filter: grayscale(0%);
  transform: scale(1.05);
}

/* ==========================================
   11. TEAM SECTION
   ========================================== */
.team-content {
  display: grid;
  gap: var(--space-3xl);
}

.team-member {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-2xl);
  align-items: center;
}

.team-photo {
  height: 500px;
  overflow: hidden;
}

.team-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(50%);
  transition: filter var(--transition-base);
}

.team-photo:hover img {
  filter: grayscale(0%);
}

.team-name {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.team-role {
  font-size: 1.125rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.team-bio {
  color: var(--gray-600);
  margin-bottom: var(--space-lg);
}

.team-certifications {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.certification-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  font-size: 0.875rem;
  border: 1px solid var(--gray-300);
  background: var(--gray-100);
}

.values-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: var(--space-xl);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.value-item {
  text-align: center;
  padding: var(--space-xl);
  background: var(--gray-100);
}

.value-item i {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.value-item h4 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.value-item p {
  color: var(--gray-600);
  font-size: 0.9375rem;
}

/* ==========================================
   12. TESTIMONIALS SECTION
   ========================================== */
.testimonials {
  background: var(--primary);
  color: var(--white);
}

.testimonials .section-title {
  color: var(--white);
}

.testimonials-slider {
  position: relative;
  overflow: hidden;
}

.testimonial-track {
  display: flex;
  gap: var(--space-lg);
  transition: transform var(--transition-base);
}

.testimonial-card {
  min-width: 100%;
  padding: var(--space-2xl);
  background: var(--primary-light);
  text-align: center;
}

.testimonial-rating {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.testimonial-rating i {
  color: var(--accent);
  font-size: 1.25rem;
}

.testimonial-text {
  font-size: 1.25rem;
  font-style: italic;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.testimonial-author strong {
  font-size: 1.125rem;
  color: var(--white);
}

.testimonial-author span {
  font-size: 0.9375rem;
  color: var(--gray-400);
}

.testimonials-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.testimonial-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--white);
  color: var(--white);
  transition: all var(--transition-fast);
}

.testimonial-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
}

/* ==========================================
   13. BOOKING CTA SECTION
   ========================================== */
.booking-cta {
  background: var(--accent);
  color: var(--white);
}

.booking-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.booking-title {
  font-size: 2.5rem;
  color: var(--white);
  margin-bottom: var(--space-md);
}

.booking-description {
  font-size: 1.125rem;
  margin-bottom: var(--space-xl);
  opacity: 0.9;
}

.booking-benefits {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.booking-benefit {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
}

.booking-benefit i {
  font-size: 1.25rem;
}

.booking-cta .btn-primary {
  background: var(--white);
  color: var(--accent);
  border-color: var(--white);
}

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

/* ==========================================
   14. CONTACT SECTION
   ========================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-3xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--white);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-xs);
}

.contact-details p,
.contact-details a {
  color: var(--gray-600);
  font-size: 0.9375rem;
}

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

.contact-form {
  background: var(--gray-100);
  padding: var(--space-2xl);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.form-group label {
  font-weight: 600;
  font-size: 0.9375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--space-sm);
  border: 2px solid var(--gray-300);
  background: var(--white);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: var(--error);
}

.form-error {
  font-size: 0.875rem;
  color: var(--error);
  display: none;
}

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

.form-checkbox {
  flex-direction: row;
  align-items: center;
}

.form-checkbox input {
  width: 20px;
  height: 20px;
  margin-right: var(--space-xs);
}

.form-checkbox label {
  font-weight: 400;
  cursor: pointer;
}

.form-message {
  padding: var(--space-md);
  margin-top: var(--space-md);
  text-align: center;
  font-weight: 600;
  display: none;
}

.form-message.visible {
  display: block;
}

.form-message.success {
  background: var(--success);
  color: var(--white);
}

.form-message.error {
  background: var(--error);
  color: var(--white);
}

/* ==========================================
   15. FOOTER
   ========================================== */
.footer {
  background: var(--primary);
  color: var(--white);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.footer-logo .logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-logo .logo-full {
  font-size: 0.875rem;
  color: var(--gray-400);
}

.footer-description {
  color: var(--gray-400);
  font-size: 0.9375rem;
}

.footer-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
  color: var(--white);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

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

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-contact li {
  display: flex;
  gap: var(--space-sm);
  color: var(--gray-400);
  font-size: 0.9375rem;
}

.footer-contact i {
  color: var(--accent);
  margin-top: 4px;
  flex-shrink: 0;
}

.footer-contact a {
  color: var(--gray-400);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--gray-700);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-copyright {
  color: var(--gray-400);
  font-size: 0.875rem;
}

.footer-legal {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.footer-legal a {
  color: var(--gray-400);
  font-size: 0.875rem;
}

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

.footer-legal span {
  color: var(--gray-600);
}

/* ==========================================
   16. SCROLL TO TOP
   ========================================== */
.scroll-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-sticky);
}

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

.scroll-top:hover {
  background: var(--primary);
  transform: translateY(-4px);
}

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

@keyframes bounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease;
}

/* ==========================================
   18. RESPONSIVE - MOBILE FIRST
   ========================================== */

/* Tablet: 768px and up */
@media (max-width: 1024px) {
  .process-step,
  .process-step-reverse {
    grid-template-columns: 1fr;
  }

  .process-number {
    font-size: 3rem;
  }

  .process-step-reverse .process-content {
    order: 1;
  }

  .process-step-reverse .process-visual {
    order: 2;
  }
}

@media (max-width: 768px) {
  /* Navigation Mobile */
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    padding: var(--space-2xl);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
  }

  .nav-link {
    font-size: 1.5rem;
  }

  /* Hero */
  .hero-image {
    width: 100%;
    opacity: 0.3;
  }

  .hero-cta {
    flex-direction: column;
  }

  /* Sections */
  section {
    padding: var(--space-2xl) 0;
  }

  /* Projects Grid */
  .projects-grid {
    grid-template-columns: 1fr;
  }

  /* Expertise Grid */
  .expertise-grid {
    grid-template-columns: 1fr;
  }

  /* Team */
  .team-member {
    grid-template-columns: 1fr;
  }

  .team-photo {
    height: 400px;
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* Mobile: Below 480px */
@media (max-width: 480px) {
  :root {
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

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

  .booking-benefits {
    flex-direction: column;
    align-items: center;
  }

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

  .scroll-top {
    bottom: var(--space-md);
    right: var(--space-md);
  }
}

/* Desktop Large: 1440px and up */
@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }

  .hero-title {
    font-size: 6rem;
  }
}

/* ==========================================
   19. PRINT STYLES
   ========================================== */
@media print {
  .header,
  .scroll-top,
  .nav-toggle,
  .hero-cta,
  .projects-filter,
  .testimonials-controls {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }
}