:root {
  --primary-blue: #5E7FA3;
  --secondary-blue: #D9E6F2;
  --mist-grey: #E9EEF3;
  --deep-ink: #2F4A63;
  --snow-white: #FFFFFF;
  --text-dark: #2F4A63;
  --text-light: #5E7FA3;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  --border-radius: 12px;
  --border-radius-lg: 24px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-dark);
  background-color: var(--snow-white);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 400;
  line-height: 1.3;
  color: var(--deep-ink);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

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

a:hover {
  color: var(--deep-ink);
}

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

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

header {
  background-color: var(--snow-white);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(46, 74, 99, 0.05);
}

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

.logo {
  font-family: Georgia, serif;
  font-size: 1.5rem;
  color: var(--deep-ink);
  font-weight: 400;
}

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

.nav-links a {
  color: var(--text-dark);
  font-size: 0.95rem;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--primary-blue);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 5px;
}

.burger span {
  width: 25px;
  height: 2px;
  background-color: var(--deep-ink);
  transition: var(--transition);
}

.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

footer {
  background-color: var(--mist-grey);
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--secondary-blue);
}

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

.footer-section h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--deep-ink);
}

.footer-section p,
.footer-section a {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--deep-ink);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--secondary-blue);
  color: var(--text-light);
  font-size: 0.85rem;
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-blue);
  color: var(--snow-white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 12px rgba(94, 127, 163, 0.3);
}

.back-to-top:hover {
  background-color: var(--deep-ink);
  transform: translateY(-3px);
}

.back-to-top.visible {
  display: flex;
}

.hero {
  background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--mist-grey) 100%);
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
  margin-bottom: var(--spacing-xl);
}

.hero h1 {
  color: var(--deep-ink);
  margin-bottom: var(--spacing-md);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section {
  margin-bottom: var(--spacing-xl);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--deep-ink);
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--primary-blue);
  color: var(--snow-white);
  border-radius: var(--border-radius);
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
}

.btn:hover {
  background-color: var(--deep-ink);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(94, 127, 163, 0.3);
}

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

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

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--deep-ink);
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--mist-grey);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--snow-white);
}

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

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 4px;
}

.checkbox-group label {
  font-weight: normal;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--snow-white);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(46, 74, 99, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 999;
  }

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

  .burger {
    display: flex;
  }

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

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero {
    padding: var(--spacing-lg) var(--spacing-sm);
  }

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

@media (max-width: 480px) {
  :root {
    --spacing-xl: 3rem;
    --spacing-lg: 2rem;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
}

@media (max-width: 320px) {
  :root {
    --spacing-xl: 2rem;
    --spacing-lg: 1.5rem;
    --spacing-md: 1rem;
    --spacing-sm: 0.75rem;
    --spacing-xs: 0.25rem;
  }

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

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.1rem;
  }

  .logo {
    font-size: 1.2rem;
  }

  .nav-links {
    top: 60px;
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .hero {
    padding: var(--spacing-md) var(--spacing-xs);
  }

  .hero p {
    font-size: 0.95rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .footer-section {
    font-size: 0.85rem;
  }

  .back-to-top {
    bottom: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .form-group input,
  .form-group textarea,
  .form-group select {
    padding: 10px;
    font-size: 0.9rem;
  }

  .form-group textarea {
    min-height: 100px;
  }
}

@media (max-width: 768px) {
  [style*="grid-template-columns: repeat(3, 1fr)"] {
    grid-template-columns: 1fr !important;
  }

  [style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  [style*="grid-template-columns: 1.2fr 1fr"],
  [style*="grid-template-columns: 1.5fr 1fr"] {
    grid-template-columns: 1fr !important;
  }

  [style*="display: grid"][style*="grid-template-columns: repeat(auto-fit"] {
    grid-template-columns: 1fr !important;
  }
}

@media (max-width: 320px) {
  [style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }

  [style*="min-width: 280px"],
  [style*="min-width: 300px"],
  [style*="min-width: 320px"] {
    min-width: 100% !important;
  }

  [style*="display: flex"][style*="gap"] {
    flex-direction: column !important;
    gap: var(--spacing-sm) !important;
  }

  img[style*="width"] {
    width: 100% !important;
    height: auto !important;
  }

  .responsive-grid {
    grid-template-columns: 1fr !important;
  }

  .responsive-flex {
    flex-direction: column !important;
  }
}