body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f9fc;
  color: #333;
}

header {
  text-align: center;
  background: #2c3e50;
  color: white;
  padding: 30px 20px;
}

.logo {
  width: 80px;
  height: auto;
  margin-bottom: 10px;
}

.subtitle {
  font-style: italic;
  margin-top: 5px;
}

main {
  max-width: 960px;
  margin: 30px auto;
  padding: 0 20px;
}

section {
  margin-bottom: 40px;
}

h2 {
  color: #2c3e50;
  border-bottom: 2px solid #ddd;
  padding-bottom: 5px;
}

.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.gallery img {
  width: calc(33% - 10px);
  border-radius: 5px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
}

.flow-img {
  width: 100%;
  max-width: 800px;
  display: block;
  margin: 20px auto;
  border-radius: 5px;
}

ul {
  list-style-type: none;
  padding-left: 0;
}

ul li {
  background: #ecf0f1;
  margin: 8px 0;
  padding: 10px;
  border-radius: 5px;
}

.btn {
  display: inline-block;
  margin: 10px;
  padding: 12px 20px;
  background: #2980b9;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.btn:hover {
  background: #3498db;
}

footer {
  text-align: center;
  padding: 20px;
  background: #ecf0f1;
  font-size: 14px;
  color: #555;
}

.feedback-link {
  font-size: 14px;
  margin-top: 10px;
  color: #555;
}
.feedback-link a {
  color: #2980b9;
  text-decoration: none;
}
.feedback-link a:hover {
  text-decoration: underline;
}


.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  max-width: 100%;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}


.swiper {
  width: 100%;
  max-width: 280px;  /* Μικρότερο από 400px */
  height: auto;
  margin: auto;
  margin-top: 1rem;
}

.swiper-slide img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}



.feedback-results {
  padding: 2rem;
  background-color: #f9f9f9;
  border-top: 1px solid #ddd;
}
.feedback-results h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}
.feedback-results iframe {
  border: 1px solid #ccc;
  border-radius: 6px;
}


.personal-site-section {
  text-align: center;
  margin: 40px 0;
}
.personal-site-section .btn {
  padding: 10px 20px;
  background-color: #0077cc;
  color: white;
  border-radius: 8px;
  text-decoration: none;
}
.personal-site-section .btn:hover {
  background-color: #005fa3;
}




/* Sidebar styles */
.sidebar {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 2000;
  top: 0;
  left: 0;
  background-color: #ffffffee;
  overflow-x: hidden;
  transition: 0.3s;
  padding-top: 60px;
  box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.sidebar a {
  padding: 10px 20px;
  text-decoration: none;
  font-size: 18px;
  color: #333;
  display: block;
  transition: 0.2s;
}

.sidebar a:hover {
  background-color: #f0f0f0;
  color: #0077cc;
}

/* Hamburger button */
.hamburger {
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 3000;
  font-size: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: #333;
}

/* Optional: hide hamburger when sidebar is open (you can toggle it in JS too) */
.sidebar.open + .hamburger {
  display: none;
}

/* Responsive tip */
@media (min-width: 768px) {
  .hamburger {
    display: block;
  }
}
html {
  scroll-behavior: smooth;
}