/* Font */
body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
}

/* Background Overlay with Logo */
.background-overlay {
  background: url('images/logo.png') no-repeat center center fixed;
  background-size: contain;
  background-color: rgba(255, 255, 255, 0.85);
  min-height: 100vh;
}

@media (max-width: 768px) {
  .background-overlay {
    background-size: cover;
  }
}

.overlay {
  background-color: rgba(255, 255, 255, 0.8);
  padding: 20px;
  border-radius: 10px;
}

/* Section Title */
.section-title {
  text-align: center;
  margin-bottom: 20px;
  font-weight: 600;
}

/* Calendar Embed */
.calendar-container {
  width: 100%;
  max-width: 1200px;
  margin: auto;
}

.calendar-container iframe {
  width: 100%;
  height: 800px;
  border: solid 1px #ccc;
}

/* Volunteer Button */
.btn-volunteer {
  display: inline-block;
  margin-top: 1rem;
  padding: 14px 28px;
  font-size: 1.1rem;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  color: #ffffff;
  background-color: #28a745;
  border-radius: 8px;
  border: 2px solid #1e7e34;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.btn-volunteer:hover {
  background-color: #218838;
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.3);
  text-decoration: none;
  color: #ffffff;
}

/* Register Button */
.btn-register {
  display: inline-block;
  margin-top: 1rem;
  padding: 14px 28px;
  font-size: 1.1rem;
  font-weight: bold;
  text-align: center;
  text-decoration: none;
  color: #ffffff;
  background-color: #007bff;
  border-radius: 8px;
  border: 2px solid #0056b3;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
  transition: background-color 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.btn-register:hover {
  background-color: #0056b3;
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.3);
  text-decoration: none;
  color: #ffffff;
}

.alert-success, .alert-error {
  max-width: 800px;
  margin: 20px auto;
  padding: 15px;
  border-radius: 6px;
  text-align: center;
  font-weight: 600;
  font-family: Poppins, sans-serif;
}

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

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