/* 
==============================================
GAIA DIGITAL - MAIN STYLESHEET
==============================================
*/

:root {
  /* Colors */
  --primary: #2E7D32;
  --primary-light: #8BC34A;
  --primary-dark: #1B5E20;
  --secondary: #455A64;
  --dark: #263238;
  --light: #ECEFF1;
  --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;
  
  /* Typography */
  --font-primary: 'Lexend', system-ui, -apple-system, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.5;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  
  /* Borders */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: 1rem;
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  line-height: var(--line-height-base);
  color: var(--gray-900);
  background-color: var(--white);
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

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

.text-white {
  color: var(--white);
}

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

.section {
  padding: var(--spacing-xxl) 0;
}

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

.section-lg {
  padding: calc(var(--spacing-xxl) * 2) 0;
}

.section-title {
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.section-title h2 {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-md);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--primary);
}

.section-title p {
  max-width: 700px;
  margin: 0 auto;
  color: var(--gray-700);
}

/* Dark Background Sections */
.bg-dark h1, .bg-dark h2, .bg-dark h3, .bg-dark h4, .bg-dark h5, .bg-dark h6,
.bg-primary h1, .bg-primary h2, .bg-primary h3, .bg-primary h4, .bg-primary h5, .bg-primary h6,
.footer h1, .footer h2, .footer h3, .footer h4, .footer h5, .footer h6,
.hero h1, .hero h2, .hero h3, .hero h4, .hero h5, .hero h6,
.cta h1, .cta h2, .cta h3, .cta h4, .cta h5, .cta h6 {
  color: var(--white);
}

.bg-dark p, .bg-dark li, .bg-dark span,
.bg-primary p, .bg-primary li, .bg-primary span,
.footer p, .footer li, .footer span,
.hero p, .hero li, .hero span,
.cta p, .cta li, .cta span {
  color: var(--gray-200);
}

.bg-dark a, .bg-primary a, .footer a, .hero a, .cta a {
  color: var(--primary-light);
}

.bg-dark a:hover, .bg-primary a:hover, .footer a:hover, .hero a:hover, .cta a:hover {
  color: var(--white);
}

.bg-dark .section-title h2::after,
.bg-primary .section-title h2::after,
.footer .section-title h2::after,
.hero .section-title h2::after,
.cta .section-title h2::after {
  background-color: var(--white);
}

.bg-dark .section-title p,
.bg-primary .section-title p,
.footer .section-title p,
.hero .section-title p,
.cta .section-title p {
  color: var(--gray-200);
}

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.flex {
  display: flex;
}

.flex-center {
  justify-content: center;
  align-items: center;
}

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

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--white);
}

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

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

/* Improved contrast for dark backgrounds */
.bg-dark .btn-outline, .bg-primary .btn-outline, .hero .btn-outline, .footer .btn-outline, .cta .btn-outline {
  border-color: var(--white);
  color: var(--white);
}

.bg-dark .btn-outline:hover, .bg-primary .btn-outline:hover, .hero .btn-outline:hover, .footer .btn-outline:hover, .cta .btn-outline:hover {
  background-color: var(--white);
  color: var(--primary);
}

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

.btn-light:hover {
  background-color: var(--dark);
}

.btn-dark {
  background-color: var(--dark);
  color: var(--white);
}

.btn-dark:hover {
  background-color: var(--gray-800);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  transition: all var(--transition-base);
}

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

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

.logo {
  display: flex;
  align-items: center;
}

.logo img, .logo svg {
  height: 40px;
  width: auto;
}

/* Logo switching */
.logo-dark {
  display: none;
}

.logo-light {
  display: block;
}

.header.scrolled .logo-dark {
  display: block;
}

.header.scrolled .logo-light {
  display: none;
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--white);
  font-weight: 500;
  position: relative;
}

.header.scrolled .nav-link {
  color: var(--dark);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-light);
  transition: width var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--primary-light);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
  color: var(--primary);
}

.header.scrolled .nav-link::after {
  background-color: var(--primary);
}

.nav-mobile {
  display: none;
  cursor: pointer;
}

.nav-mobile span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--white);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

.header.scrolled .nav-mobile span {
  background-color: var(--dark);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: var(--white);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(0,0,0,0.7), rgba(0,0,0,0.4));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease;
  color: var(--white);
}

.hero-text {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease 0.2s;
  animation-fill-mode: both;
  color: var(--gray-200);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  animation: fadeInUp 1s ease 0.4s;
  animation-fill-mode: both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Parallax Sections */
.parallax {
  position: relative;
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  padding: var(--spacing-xxl) 0;
  color: var(--white);
}

.parallax::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1;
}

.parallax-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

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

.parallax-text {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  color: var(--gray-200);
}

/* Services Section */
.services-card {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
  height: 100%;
}

.services-card:hover {
  transform: translateY(-10px);
}

.services-icon {
  margin-bottom: var(--spacing-md);
  color: var(--primary);
  font-size: 2.5rem;
}

.services-icon i {
  font-size: 2.5rem;
}

.services-title {
  margin-bottom: var(--spacing-sm);
}

.services-text {
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
}

.services-features {
  margin-top: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--gray-700);
}

.feature-item i {
  color: var(--primary);
  font-size: 1.2rem;
}

/* Dark background service cards */
.bg-dark .services-card, .bg-primary .services-card {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.bg-dark .services-title, .bg-primary .services-title {
  color: var(--white);
}

.bg-dark .services-text, .bg-primary .services-text,
.bg-dark .feature-item, .bg-primary .feature-item {
  color: var(--gray-200);
}

.bg-dark .feature-item i, .bg-primary .feature-item i {
  color: var(--primary-light);
}

/* About Section */
.about-image {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

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

.about-title {
  margin-bottom: var(--spacing-md);
}

.about-text {
  color: var(--gray-700);
}

/* Dark background about section */
.bg-dark .about-title, .bg-primary .about-title {
  color: var(--white);
}

.bg-dark .about-text, .bg-primary .about-text {
  color: var(--gray-200);
}

/* Portfolio Section */
.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.portfolio-filter {
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-md);
  background-color: var(--gray-200);
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.portfolio-image {
  max-width: 400px;
  max-height: 160px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  background: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.03);
  transition: box-shadow 0.3s;
}

.portfolio-item {
  position: relative;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  aspect-ratio: 16/9;
}

.portfolio-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity var(--transition-base);
  padding: var(--spacing-md);
  text-align: center;
}

.portfolio-title {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
  transform: translateY(-20px);
  transition: transform var(--transition-base);
}

.portfolio-category {
  color: var(--primary-light);
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.portfolio-item:hover .portfolio-image {
  transform: scale(1.1);
}

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

.portfolio-item:hover .portfolio-title,
.portfolio-item:hover .portfolio-category {
  transform: translateY(0);
}

/* Dark background portfolio section */
.bg-dark .portfolio-filter, .bg-primary .portfolio-filter {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--gray-200);
}

.bg-dark .portfolio-filter:hover, .bg-primary .portfolio-filter:hover,
.bg-dark .portfolio-filter.active, .bg-primary .portfolio-filter.active {
  background-color: var(--white);
  color: var(--primary);
}

/* Testimonials Section */
.testimonials {
  background-color: var(--gray-100);
}

.testimonial-item {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
}

.testimonial-text {
  font-style: italic;
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
}

.testimonial-author {
  font-weight: 600;
}

.testimonial-position {
  color: var(--gray-600);
  font-size: 0.875rem;
}

/* Dark background testimonials */
.bg-dark .testimonial-item, .bg-primary .testimonial-item {
  background-color: rgba(255, 255, 255, 0.1);
}

.bg-dark .testimonial-text, .bg-primary .testimonial-text {
  color: var(--gray-200);
}

.bg-dark .testimonial-author, .bg-primary .testimonial-author {
  color: var(--white);
}

.bg-dark .testimonial-position, .bg-primary .testimonial-position {
  color: var(--gray-300);
}

/* CTA Section */
.cta {
  background-color: var(--primary);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-xxl) 0;
}

.cta-title {
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.cta-text {
  margin-bottom: var(--spacing-lg);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  color: var(--gray-200);
}

/* Contact Section */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

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

.contact-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-md);
  background-color: var(--primary-light);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
}

.contact-title {
  margin-bottom: var(--spacing-sm);
}

.contact-text {
  color: var(--gray-700);
}

.contact-text a {
  color: var(--gray-700);
  transition: color var(--transition-fast);
}

.contact-text a:hover {
  color: var(--primary);
}

/* Dark background contact section */
.bg-dark .contact-title, .bg-primary .contact-title {
  color: var(--white);
}

.bg-dark .contact-text, .bg-primary .contact-text {
  color: var(--gray-200);
}

.bg-dark .contact-text a, .bg-primary .contact-text a {
  color: var(--gray-200);
}

.bg-dark .contact-text a:hover, .bg-primary .contact-text a:hover {
  color: var(--primary-light);
}

/* Team Section */
.team-member {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.team-image {
  width: 100%;
  max-width: 300px;
  height: 300px;
  margin: 0 auto var(--spacing-md);
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.team-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-info {
  padding: var(--spacing-md);
}

.team-name {
  margin-bottom: var(--spacing-xs);
}

.team-position {
  color: var(--primary);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.team-bio {
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
}

.team-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

.team-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--gray-200);
  color: var(--gray-700);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all var(--transition-fast);
}

.team-social a:hover {
  background-color: var(--primary);
  color: var(--white);
}

/* Dark background team section */
.bg-dark .team-name, .bg-primary .team-name {
  color: var(--white);
}

.bg-dark .team-position, .bg-primary .team-position {
  color: var(--primary-light);
}

.bg-dark .team-bio, .bg-primary .team-bio {
  color: var(--gray-200);
}

.bg-dark .team-social a, .bg-primary .team-social a {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--gray-200);
}

.bg-dark .team-social a:hover, .bg-primary .team-social a:hover {
  background-color: var(--white);
  color: var(--primary);
}

.clients-grid {
  display: grid;
  grid-template-columns: 1fr; /* Por defecto, 1 columna */
  gap: var(--spacing-lg);
  align-items: center;
  justify-items: center;
}

@media (min-width: 600px) {
  .clients-grid {
    grid-template-columns: repeat(2, 1fr); /* 2 columnas en tablet */
  }
}

@media (min-width: 900px) {
  .clients-grid {
    grid-template-columns: repeat(3, 1fr); /* 3 columnas en desktop */
  }
}.client-logo {
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 120px;
  width: 100%;
  transition: transform var(--transition-base);
}

.client-logo:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.client-logo img {
  max-width: 100%;
  max-height: 80px;
  object-fit: contain;
}

/* Dark background clients section */
.bg-dark .client-logo, .bg-primary .client-logo {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Footer */
.footer {
  background-color: var(--dark);
  color: var(--gray-200);
  padding-top: var(--spacing-xxl);
}

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

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

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

.footer-text {
  margin-bottom: var(--spacing-md);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--white);
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--primary);
  color: var(--white);
}

.footer-title {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

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

.footer-links a {
  color: var(--gray-300);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md) 0;
  text-align: center;
}

/* WhatsApp Button */
.whatsapp-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #25D366;
  color: var(--white);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: all var(--transition-fast);
}

.whatsapp-btn:hover {
  transform: scale(1.1);
  color: var(--white);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary);
  color: var(--white);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

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

.back-to-top:hover {
  background-color: var(--primary-dark);
  color: var(--white);
}

/* Portfolio Modal */
.portfolio-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 1100;
  overflow-y: auto;
}

.portfolio-modal-content {
  position: relative;
  width: 90%;
  max-width: 1000px;
  margin: 50px auto;
  background-color: var(--white);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.portfolio-modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 2rem;
  color: var(--gray-700);
  cursor: pointer;
  z-index: 1101;
}

.portfolio-modal-body {
  padding: var(--spacing-xl);
}

.portfolio-modal-body h2 {
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.portfolio-modal-image {
  margin-bottom: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  overflow: hidden;
}

.portfolio-modal-image img {
  width: 100%;
  height: auto;
}

.portfolio-modal-info {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: var(--spacing-lg);
}

.portfolio-modal-meta {
  color: var(--gray-700);
}

.portfolio-modal-meta p {
  margin-bottom: var(--spacing-sm);
}

.portfolio-modal-description h3 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.portfolio-modal-description p {
  color: var(--gray-700);
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--white);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader {
  width: 50px;
  height: 50px;
  border: 5px solid var(--gray-200);
  border-top: 5px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility Classes */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-5 { margin-top: 1.5rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 1.5rem; }

.ml-1 { margin-left: 0.25rem; }
.ml-2 { margin-left: 0.5rem; }
.ml-3 { margin-left: 0.75rem; }
.ml-4 { margin-left: 1rem; }
.ml-5 { margin-left: 1.5rem; }

.mr-1 { margin-right: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mr-4 { margin-right: 1rem; }
.mr-5 { margin-right: 1.5rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.5rem; }

.rounded { border-radius: var(--border-radius-md); }
.shadow { box-shadow: var(--shadow-md); }

.img-fluid {
  max-width: 100%;
  height: auto;
}

.bg-primary { background-color: var(--primary); }
.bg-dark { background-color: var(--dark); }
.bg-light { background-color: var(--light); }
.bg-white { background-color: var(--white); }

/* Responsive Styles */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
}

@media (max-width: 992px) {
  .container {
    max-width: 720px;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .portfolio-modal-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .container {
    max-width: 540px;
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .nav-list {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--white);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    transition: left var(--transition-base);
    z-index: 999;
  }
  
  .nav-list.active {
    left: 0;
  }
  
  .nav-link {
    color: var(--dark);
  }
  
  .nav-mobile {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-text {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-buttons .btn {
    width: 100%;
  }
  
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .container {
    width: 100%;
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title h2 {
    font-size: 1.75rem;
  }
  
  .portfolio-filters {
    flex-direction: column;
    align-items: center;
  }
  
  .portfolio-filter {
    width: 100%;
    text-align: center;
  }
  
  .portfolio-modal-content {
    width: 95%;
    margin: 20px auto;
  }
  
  .portfolio-modal-body {
    padding: var(--spacing-md);
  }
  
  .clients-grid {
    grid-template-columns: 1fr;
  }
}