.hidden {
  display: none !important;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3 {
  color: #2c3e50;
}

a {
  text-decoration: none;
  color: #3498db;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: #3498db;
  color: #fff;
  border-radius: 5px;
  margin: 10px;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #2980b9;
}

.hero {
  background: #f4f4f4;
  color: #333;
  padding: 100px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
}

.advantages {
  padding: 60px 0;
  text-align: center;
}

.advantages-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.advantage {
  flex: 1 1 22%;
  margin: 10px;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.advantage span {
  font-size: 2rem;
  display: block;
  margin-bottom: 15px;
}

.how-it-works {
  background: #f9f9f9;
  padding: 60px 0;
  text-align: center;
}

.steps {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.step {
  flex: 1 1 30%;
  margin: 10px;
  padding: 20px;
}

.how-it-works {
  background: #f9f9f9;
  padding: 80px 0;
  text-align: center;
}

.how-it-works h2 {
  font-size: 2rem;
  margin-bottom: 60px;
  color: #2c3e50;
}

.how-it-works .steps {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.how-it-works .step {
  flex: 1;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.how-it-works .step:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.how-it-works .step-icon {
  width: 60px;
  height: 60px;
  background: #3498db;
  color: #fff;
  font-size: 1.5rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin: 0 auto 20px;
}

.how-it-works h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #2c3e50;
}

.how-it-works p {
  font-size: 1rem;
  color: #666;
}

.cta {
  background: #3498db;
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.cta p {
  font-size: 1.2rem;
  margin-bottom: 40px;
}

.cta .buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.cta .btn {
  padding: 15px 30px;
  font-size: 1rem;
  border-radius: 5px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.cta .btn-telegram {
  background: #0088cc;
}

.cta .btn-vk {
  background: #4a76a8;
}

.cta .btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

footer {
  background: #2c3e50;
  color: #fff;
  padding: 20px 0;
  text-align: center;
}

footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

footer p {
  margin: 0;
  font-size: 14px;
}

footer .footer-links {
  display: flex;
  gap: 20px;
}

footer .footer-links a {
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  transition: opacity 0.3s;
}

footer .footer-links a:hover {
  opacity: 0.8;
}

.language-switcher {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  gap: 10px;
}

.language-switcher button {
  background: #3498db;
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: 5px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.3s, transform 0.3s;
}

.language-switcher button:hover {
  background: #2980b9;
  transform: translateY(-2px);
}

.language-switcher button:active {
  transform: translateY(0);
}

@media (max-width: 768px) {
  * {
    user-select: none;
  }

  .language-switcher {
    top: 10px;
    right: 10px;
  }

  .language-switcher button {
    padding: 6px 12px;
    font-size: 12px;
  }

  .hero {
    padding: 60px 0;
  }

  .hero h1 {
    font-size: 1.8rem;
    margin-bottom: 15px;
  }

  .hero p {
    font-size: 1rem;
  }

  .advantages-grid {
    flex-direction: column;
    gap: 20px;
  }

  .advantage {
    flex: 1 1 auto;
    padding: 15px;
  }

  .how-it-works {
    padding: 40px 0;
  }

  .how-it-works h2 {
    font-size: 1.8rem;
  }

  .steps {
    flex-direction: column;
    gap: 30px;
  }

  .cta {
    padding: 60px 0;
  }

  .cta h2 {
    font-size: 1.5rem;
  }

  .cta p {
    font-size: 1rem;
  }

  .cta .buttons {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .cta .btn {
    width: 90%;
    max-width: 300px;
    margin: 0;
  }

  footer .container {
    gap: 15px;
  }

  footer .footer-links {
    flex-direction: column;
    gap: 10px;
  }

  .feedback {
    padding: 40px 0;
  }

  .feedback h2 {
    font-size: 1.8rem;
    margin-bottom: 30px;
  }

  .feedback form {
    padding: 0 20px;
  }

  .feedback input,
  .feedback textarea {
    font-size: 0.9rem;
  }

  .feedback button {
    width: 100%;
    padding: 12px;
  }

  .faq-section {
    padding: 40px 0;
  }

  .faq-question {
    padding: 12px 15px;
  }
}

@media (max-width: 480px) {
  * {
    user-select: none;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .how-it-works h2 {
    font-size: 1.5rem;
  }

  .step-icon {
    width: 45px;
    height: 45px;
    font-size: 1.2rem;
  }

  .cta h2 {
    font-size: 1.3rem;
  }
}

.feedback {
  background: #3498db;
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.feedback h2 {
  font-size: 2rem;
  margin-bottom: 40px;
  color: #fff;
}

.feedback form {
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}

.feedback .form-group {
  margin-bottom: 20px;
}

.feedback label {
  display: block;
  font-size: 1rem;
  margin-bottom: 5px;
  color: #fff;
}

.feedback input,
.feedback textarea {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  transition: border-color 0.3s;
  background-color: rgba(255,255,255,0.9);
}

.feedback input:focus,
.feedback textarea:focus {
  outline: none;
  border-color: #fff;
}

.feedback textarea {
  resize: vertical;
}

.feedback button {
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  background-color: #fff;
  color: #3498db;
}

.feedback button:hover {
  transform: translateY(-2px);
  background-color: #f0f0f0;
}

.feedback button:active {
  transform: translateY(0);
}

.feedback button:disabled,
.feedback button[disabled]{
  background: #bdc3c7;
  color: #7f8c8d;
  cursor: not-allowed;
  transform: none;
}

.feedback-message {
  margin-top: 20px;
  padding: 10px;
  border-radius: 5px;
  text-align: center;
  font-size: 1rem;
}

#feedback-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

#feedback-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

[data-lang] {
  transition: opacity 0.3s ease;
}

.faq-answer p[data-lang],
.faq-answer li[data-lang] {
  display: block;
  margin-bottom: 8px;
}

.faq-section {
  padding: 60px 0;
  background: #f9f9f9;
}

.faq-section h2 {
  text-align: center;
  margin-bottom: 40px;
  color: #2c3e50;
}

.faq-item {
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.faq-question {
  padding: 15px 20px;
  background: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question h3 {
  margin: 0;
  font-size: 1.1rem;
}

.toggle-icon {
  font-size: 1.5rem;
  font-weight: bold;
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background: #fff;
}

.faq-answer p, .faq-answer ul {
  margin: 0;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 20px 20px;
}

.faq-contact {
  text-align: center;
  margin-top: 30px;
  font-style: italic;
}

.faq-contact p {
  margin: 0;
}