/* ============================================================================
   MAIN STYLESHEET - Modern, Responsive Web Development Framework
   ============================================================================ */

/* Import CSS Variables */
@import url('./variables.css');

/* ===== MODERN CSS RESET ===== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-primary);
  line-height: var(--line-height-normal);
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ===== ACCESSIBILITY ===== */

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 8px;
  z-index: var(--z-modal);
  text-decoration: none;
  border-radius: var(--radius-base);
  font-weight: var(--font-weight-medium);
  transition: top var(--duration-200) var(--ease-out);
}

.skip-link:focus {
  top: 6px;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-base);
}

/* ===== TYPOGRAPHY ===== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-200) var(--ease-out);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

/* ===== LAYOUT COMPONENTS ===== */

.container {
  max-width: var(--container-max-width);
  margin: var(--container-margin);
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  width: 100%;
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

.section {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  position: relative;
}

.section-dark {
  background-color: var(--color-gray-900);
  color: var(--color-white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
  color: var(--color-white);
}

.section-dark p {
  color: var(--color-gray-300);
}

.section-light {
  background-color: var(--color-gray-50);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
  max-width: 60rem;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background-color: var(--color-primary-50);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-6);
  line-height: var(--line-height-tight);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 48rem;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--font-size-4xl);
  }
}

/* ===== HEADER & NAVIGATION ===== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: all var(--duration-300) var(--ease-out);
}

.navbar {
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.nav-brand .logo {
  height: 40px;
  width: auto;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-base);
  transition: background-color var(--duration-200) var(--ease-out);
}

.nav-toggle:hover {
  background-color: var(--color-gray-100);
}

.hamburger-line {
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-700);
  margin: 3px 0;
  transition: all var(--duration-300) var(--ease-out);
  border-radius: 2px;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

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

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--space-2);
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  border-radius: var(--radius-base);
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

.nav-cta {
  margin-left: var(--space-4);
}

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-300) var(--ease-out);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-1);
    width: 100%;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    text-align: center;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: var(--space-2);
  }
}

/* ===== HERO SECTION ===== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-900), var(--color-primary-600));
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.8), rgba(29, 78, 216, 0.6));
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  color: var(--color-white);
  width: 100%;
  padding: var(--space-8) 0;
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-6);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-title-main {
  display: block;
  color: var(--color-white);
}

.hero-title-accent {
  display: block;
  background: linear-gradient(45deg, var(--color-accent-400), var(--color-accent-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-accent-400);
}

.hero-title-sub {
  display: block;
  color: var(--color-gray-200);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-2);
}

.hero-description {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-200);
  max-width: 48rem;
  margin: 0 auto var(--space-8);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  justify-content: center;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
  }
}

.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  text-align: center;
  color: var(--color-white);
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 2px;
  height: var(--space-8);
  background-color: var(--color-white);
  margin: 0 auto var(--space-2);
  position: relative;
}

.scroll-arrow::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--color-white);
}

.scroll-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* ===== ABOUT SECTION ===== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.about-subtitle {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.about-paragraph {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  display: block;
  line-height: var(--line-height-none);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-1);
}

.about-image-container {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
}

.about-image {
  width: 100%;
  height: auto;
  display: block;
}

.about-badge {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.badge-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

/* ===== SERVICES SECTION ===== */

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-300) var(--ease-out);
  border: 1px solid var(--border-primary);
  text-align: center;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-200);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-600));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  color: var(--color-white);
  font-size: var(--font-size-2xl);
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.service-description {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
}

.service-features {
  list-style: none;
  margin-bottom: var(--space-6);
}

.service-features li {
  padding: var(--space-1) 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: var(--space-6);
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: var(--font-weight-bold);
}

.services-cta {
  text-align: center;
  background: var(--color-gray-50);
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-8);
}

.cta-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

/* ===== PORTFOLIO SECTION ===== */

.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
}

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

.portfolio-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .portfolio-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .portfolio-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.portfolio-item {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--duration-300) var(--ease-out);
  cursor: pointer;
}

.portfolio-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.portfolio-image {
  width: 100%;
  height: 240px;
  object-fit: cover;
  transition: transform var(--duration-300) var(--ease-out);
}

.portfolio-item:hover .portfolio-image {
  transform: scale(1.05);
}

.portfolio-content {
  padding: var(--space-6);
}

.portfolio-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.portfolio-category {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-3);
}

.portfolio-description {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.portfolio-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--duration-200) var(--ease-out);
}

.portfolio-link:hover {
  gap: var(--space-2);
  text-decoration: none;
}

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

/* ===== TESTIMONIALS SECTION ===== */

.testimonials-carousel {
  position: relative;
  max-width: 60rem;
  margin: 0 auto;
}

.testimonials-container {
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.testimonial-item {
  background: var(--bg-card);
  padding: var(--space-12);
  text-align: center;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.testimonial-quote {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-relaxed);
  color: var(--text-primary);
  margin-bottom: var(--space-8);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}

.testimonial-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-primary-100);
}

.testimonial-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.testimonial-role {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.carousel-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-200) var(--ease-out);
  font-size: var(--font-size-lg);
}

.carousel-btn:hover {
  background: var(--color-primary-700);
  transform: scale(1.05);
}

.carousel-dots {
  display: flex;
  gap: var(--space-2);
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gray-300);
  cursor: pointer;
  transition: background var(--duration-200) var(--ease-out);
}

.carousel-dot.active {
  background: var(--color-primary);
}

/* ===== CONTACT SECTION ===== */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1.5fr;
  }
}

.contact-subtitle {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
}

.contact-text {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.contact-details {
  margin-bottom: var(--space-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-50);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-content-item {
  flex: 1;
}

.contact-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.contact-value {
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
}

.contact-value a {
  color: var(--text-secondary);
}

.contact-value a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.social-links {
  margin-top: var(--space-8);
}

.social-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-4);
}

.social-icons {
  display: flex;
  gap: var(--space-3);
}

.social-link {
  width: 44px;
  height: 44px;
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-600);
  transition: all var(--duration-200) var(--ease-out);
}

.social-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-2px);
}

/* ===== BUTTON COMPONENTS ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-primary);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-200) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  line-height: 1;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-200);
}

.btn-sm {
  height: var(--btn-height-sm);
  padding: 0 var(--btn-padding-x-sm);
  font-size: var(--btn-font-size-sm);
}

.btn-lg {
  height: var(--btn-height-lg);
  padding: 0 var(--btn-padding-x-lg);
  font-size: var(--btn-font-size-lg);
}

.btn-xl {
  height: var(--btn-height-xl);
  padding: 0 var(--btn-padding-x-xl);
  font-size: var(--btn-font-size-xl);
}

.btn:not(.btn-sm):not(.btn-lg):not(.btn-xl) {
  height: var(--btn-height-base);
  padding: 0 var(--btn-padding-x-base);
  font-size: var(--btn-font-size-base);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-700);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

.btn-icon {
  margin-left: var(--space-1);
  transition: transform var(--duration-200) var(--ease-out);
}

.btn:hover .btn-icon {
  transform: translateX(2px);
}

.btn-loading .btn-text {
  opacity: 0;
}

.btn-loading .btn-loading {
  display: block;
}

.btn .btn-loading {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* ===== FORM COMPONENTS ===== */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: var(--input-height);
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--input-font-size);
  font-family: var(--font-primary);
  color: var(--text-primary);
  background-color: var(--bg-card);
  border: var(--input-border-width) solid var(--border-primary);
  border-radius: var(--input-border-radius);
  transition: all var(--duration-200) var(--ease-out);
}

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

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

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

.form-error {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-1);
  min-height: 1.25rem;
}

.form-checkbox {
  margin-bottom: var(--space-4);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-base);
  background-color: var(--bg-card);
  position: relative;
  flex-shrink: 0;
  transition: all var(--duration-200) var(--ease-out);
  margin-top: 2px;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 6px;
  width: 4px;
  height: 8px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

.checkbox-label input[type="checkbox"]:focus + .checkbox-custom {
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* ===== FOOTER ===== */

.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--footer-padding-y) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  margin-bottom: var(--space-8);
}

.footer-logo {
  height: 40px;
  width: auto;
  margin-bottom: var(--space-4);
}

.footer-description {
  color: var(--color-gray-400);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

.footer-list {
  list-style: none;
}

.footer-list li {
  margin-bottom: var(--space-2);
}

.footer-link {
  color: var(--color-gray-400);
  transition: color var(--duration-200) var(--ease-out);
}

.footer-link:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-700);
  padding-top: var(--space-8);
}

.footer-bottom-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-copyright {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-4);
}

.footer-bottom-link {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  transition: color var(--duration-200) var(--ease-out);
}

.footer-bottom-link:hover {
  color: var(--color-white);
  text-decoration: none;
}

/* ===== MODAL ===== */

.modal-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-300) var(--ease-out);
}

.modal-container[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-overlay);
  cursor: pointer;
}

.modal-content {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-2xl);
  transform: scale(0.9);
  transition: transform var(--duration-300) var(--ease-out);
}

.modal-container[aria-hidden="false"] .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  background: var(--color-gray-100);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: background var(--duration-200) var(--ease-out);
}

.modal-close:hover {
  background: var(--color-gray-200);
}

.modal-body {
  padding: var(--space-8);
}

/* ===== BACK TO TOP ===== */

.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-fixed);
  transform: scale(0);
  transition: all var(--duration-300) var(--ease-out);
  box-shadow: var(--shadow-lg);
}

.back-to-top.show {
  transform: scale(1);
}

.back-to-top:hover {
  background: var(--color-primary-700);
  transform: scale(1.1);
}

/* ===== LOADING STATES ===== */

.loading {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  transition: opacity var(--duration-500) var(--ease-out);
}

.loading.fade-out {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-gray-200);
  border-top: 3px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ===== UTILITY CLASSES ===== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }
.hidden { display: none; }

/* ===== RESPONSIVE UTILITIES ===== */

@media (max-width: 767px) {
  .hidden-mobile { display: none !important; }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-title-sub {
    font-size: var(--font-size-xl);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hidden-tablet { display: none !important; }
}

@media (min-width: 1024px) {
  .hidden-desktop { display: none !important; }
}