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

body {
  font-family: Arial, sans-serif;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
}

.logo {
  height: 24px;
}

nav a {
  margin-left: 15px;
  text-decoration: none;
  color: #333;
}

.banner {
  background: linear-gradient(to bottom right, #f0f8ff, #add8e6);
  text-align: center;
  background-repeat: no-repeat;
  background-size: cover;
  background-image: url(banner-background.webp);
  margin-top: -60px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 158px 50px;
}

.update-notice {
  margin-bottom: 40px;
  color: #94a3b8;
  font-size: 14px;
}

.main-title {
  font-size: 48px;
  color: #007bff;
  margin-bottom: 20px;
}
.main-title svg{height: 60px;}
.slogan {
  font-size: 30px;
  color: #475569;
  margin-bottom: 30px;
  font-weight: bold;
}

.button-container {
  display: flex;
  justify-content: center;
  gap: 30px;
}

.start-chat-button,
.get-app-button {
  text-decoration: none;
  background-color: #fff;
  border: 1px solid #f9f9f9;
  border-radius: 20px;
  padding: 20px 30px;
  text-align: left;
  display: inline-block;
  transition: background-color 0.3s ease;
  box-shadow: 0 0 0 1px #f1f5f9, 0 2px 4px rgba(0, 0, 0, .05), 0 12px 24px rgba(0, 0, 0, .05);
  width: 280px;
}

.start-chat-button:hover,
.get-app-button:hover {
  background-color: #e9ecef;
}

.button-content h3 {
  color: #4d6bfe;
  margin-bottom: 10px;
}

.button-content p {
  color: #64748b;
  font-size: 15px;
}

footer {
  background-color: #f8f9fa;
  padding: 40px 20px;
  text-align: center;
}

.footer-logo-container {
  margin-bottom: 20px;
}
.footer-logo-container .social-icons{
  display: flex;
}
.footer-logo {
  height: 24px;
  margin-bottom: 20px;
}

.social-icons a {
  margin-right: 10px;
  display: contents;
  color: #94a3b8;
}
.social-icons svg {
  height: 20px;
}
.social-icons img {
  height: 20px;
}

.footer-links {
  justify-content: center;
  margin-bottom: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: auto;
}

.link-column {
  text-align: left;
}

.link-column h4 {
  color: #333;
  margin-bottom: 10px;
  font-size: 16px;
}

.link-column a {
  display: block;
  margin-bottom: 15px;
  text-decoration: none;
  color: #666;
  font-size: 14px;
  transition: color 0.3s ease;
}

.link-column a:hover {
  color: #007bff;
}

.copyright {
  color: #666;
  font-size: 14px;
}

#auth-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

#auth-dialog {
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.auth-lock-icon {
  margin-bottom: 20px;
}

#auth-title {
  font-size: 24px;
  color: #1e293b;
  margin-bottom: 10px;
}

#auth-desc {
  color: #64748b;
  font-size: 14px;
  margin-bottom: 30px;
  line-height: 1.6;
}

.auth-btn-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.auth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.auth-btn-whatsapp {
  background-color: #25D366;
  color: #fff;
}

.auth-btn-whatsapp:hover {
  background-color: #1ebe5a;
}

.auth-btn__icon {
  display: flex;
  align-items: center;
}

.auth-note {
  margin-top: 20px;
  font-size: 12px;
  color: #94a3b8;
}