:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #a3a3a3;
  --text-muted: #737373;
  --accent: #f5f5f5;
  --accent-secondary: #e5e5e5;
  --border: #262626;
  --border-light: #404040;
  --shadow: rgba(0, 0, 0, 0.5);
  --shadow-light: rgba(0, 0, 0, 0.2);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.navbar {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.25rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 3rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

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

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

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

.language-switcher {
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-tertiary);
  border-radius: 0.75rem;
  padding: 0.25rem;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.lang-btn:hover {
  color: var(--text-primary);
  transform: translateY(-1px);
}

.lang-btn.active {
  background-color: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn svg {
  width: 1.5rem;
  height: 1.5rem;
}

@media (max-width: 768px) {
  .nav-container {
    padding: 1rem;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    padding: 1rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
    animation: slideDown 0.3s ease;
  }

  .language-switcher {
    margin-top: 1rem;
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

.section-title {
  text-align: left;
  margin-bottom: 1rem;
  font-weight: 700;
  font-size: 3.125rem;
  line-height: 1.1;
}

.text-blue {
  color: #2563eb;
}

.contact-section {
  width: 100%;
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
  margin-top: 100px;
  padding: 3rem 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.contact-intro > * + * {
  margin-top: 1rem;
}

.contact-title {
  font-size: 1.875rem;
  line-height: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.contact-description {
  color: var(--text-secondary);
  font-size: 1.125rem;
  line-height: 1.7;
}

.form-group-container {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  position: relative;
}

.form-group.focused .form-label {
  color: var(--text-primary);
  transform: translateY(-2px);
}

.form-label {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.3s ease;
}

.form-input,
.form-textarea {
  padding: 0.875rem;
  border: 1px solid var(--border);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  height: 2.75rem;
  width: 100%;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  transition: all 0.3s ease;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245, 245, 245, 0.1);
  outline: none;
  transform: translateY(-1px);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

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

.form-submit {
  width: 100%;
  margin-top: 1.5rem;
  background-color: var(--accent);
  color: var(--bg-primary);
  padding: 1rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.form-submit:hover {
  background-color: #2563eb;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.form-submit:active {
  transform: translateY(0);
}

.form-submit.loading {
  pointer-events: none;
  opacity: 0.8;
}

.form-submit.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1rem;
  height: 1rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 2.5rem;
  }

  .contact-section {
    margin-top: 80px;
    padding: 2rem 1rem;
  }

  .contact-description {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 2rem;
  }

  .nav-container {
    padding: 0.75rem;
  }

  .form-group-container {
    gap: 1rem;
  }

  .form-input,
  .form-textarea {
    padding: 0.75rem;
  }
}

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

.nav-link:focus-visible,
.lang-btn:focus-visible,
.form-input:focus-visible,
.form-textarea:focus-visible,
.form-submit:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.contact-info-block {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 1.125rem;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.contact-info-item a {
  color: var(--accent); 
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-info-item a:hover {
  color: #2563eb; 
}

.contact-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--accent); 
}

@media (max-width: 768px) {
  .contact-info-block {
    font-size: 1rem;
  }
}