/* Γενικά */
body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.7;
}

section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: auto;
}

/* Header & Nav */
header {
  background-color: #f9f9f9;
  padding: 1rem 2rem;
  position: sticky;
  color: #333;
  top: 0;
  z-index: 999;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: #333;
  font-size: 1.5rem;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.2rem;
}

.nav-links a {
  color: #333;
  text-decoration: none;
  padding: 0.5rem;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #007acc;
}

/* Hero */
.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(to right, #e8f0ff, #ffffff);
  padding: 5rem 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
}

.hero-content {
  flex: 1;
  padding: 1rem;
}

.hero-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.2rem;
}

.hero .btn {
  margin-top: 1rem;
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #007acc;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.hero .btn:hover {
  background-color: #005fa3;
}

.hero-image img {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Why Choose Us */
.why-choose-us .features {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2rem;
}

.feature-box {
  flex: 1;
  min-width: 250px;
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s;
}

.feature-box:hover {
  transform: translateY(-5px);
}

/* Stats */
.stats-grid {
  display: flex;
  justify-content: space-around;
  margin-top: 2rem;
  text-align: center;
}

.stat-box {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
  flex: 1;
  margin: 0 0.5rem;
}

.stat-box h3 {
  font-size: 2.5rem;
  color: #007acc;
}

/* Partners */
.partner-logos {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.partner-logos img {
  max-height: 60px;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.partner-logos img:hover {
  filter: grayscale(0%);
}

/* Footer */
footer {
  background: #f9f9f9;
  color: #222;
  text-align: center;
  padding: 2rem;
}
/* Κεντρική στοίχιση ενότητας */
.centered-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Κάτηγοριες έργων */
.project-categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.category-card {
  background: #ffffff;
  padding: 2rem;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  max-width: 340px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.category-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.category-card p {
  margin-bottom: 1.5rem;
}

.category-card form {
  margin-top: 1rem;
}

/* Μοντέρνο κουμπί */
.category-card button.btn {
  cursor: pointer;
  background: linear-gradient(135deg, #007acc, #4eb7f5);
  color: #fff;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 4px 14px rgba(0, 122, 204, 0.3);
}

.category-card button.btn:hover {
  background: linear-gradient(135deg, #005fa3, #3aa9ea);
  box-shadow: 0 6px 18px rgba(0, 122, 204, 0.45);
  transform: scale(1.03);
}
a.btn, button.btn {
  display: inline-block;
  text-align: center;
  background: linear-gradient(135deg, #007acc, #4eb7f5);
  color: #fff;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  text-decoration: none;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 4px 14px rgba(0, 122, 204, 0.3);
}

a.btn:hover, button.btn:hover {
  background: linear-gradient(135deg, #005fa3, #3aa9ea);
  box-shadow: 0 6px 18px rgba(0, 122, 204, 0.45);
  transform: scale(1.03);
}
.contact-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem 2rem;
  background-color: #f5f9ff;
}

.contact-box {
  background-color: #ffffff;
  padding: 2.5rem;
  border-radius: 16px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.contact-box h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: #001f4d;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form label {
  font-weight: 500;
  color: #333;
}

.contact-form input,
.contact-form textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
}

.contact-form textarea {
  resize: vertical;
}

.btn.dark {
  background-color: #001f4d;
  color: #fff;
  border: none;
  border-radius: 30px;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.3s ease;
}

.btn.dark:hover {
  background-color: #003380;
}
.team-grid {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.team-member {
  background-color: #ffffff;
  padding: 1.5rem;
  border-radius: 12px;
  text-align: center;
  width: 250px;
  box-shadow: 0 6px 15px rgba(0,0,0,0.07);
  transition: transform 0.3s ease;
}

.team-member:hover {
  transform: translateY(-5px);
}

.team-member img {
  width: 100px;
  height: 100px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
}
.project-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 1rem;
}
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.project-card {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.06);
  text-align: center;
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-5px);
}

.project-card img.project-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 1rem;
}
.carousel-section {
  text-align: center;
  margin-top: 2rem;
}

.carousel {
  position: relative;
  max-width: 600px;
  margin: auto;
}

.carousel-img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: none;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}

.carousel-controls {
  margin-top: 1rem;
}

.carousel-controls button {
  background-color: #007acc;
  color: #fff;
  font-size: 1.5rem;
  border: none;
  padding: 0.5rem 1rem;
  margin: 0 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

.carousel-controls button:hover {
  background-color: #005fa3;
}
.contact-details {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  text-align: left;
  max-width: 600px;
}

.contact-details a {
  color: #007acc;
  text-decoration: none;
}

.contact-details a:hover {
  text-decoration: underline;
}

.map-container {
  width: 100%;
  max-width: 800px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.popup-message {
  position: fixed;
  top: 30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #3182CE;
  color: white;
  padding: 15px 30px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  display: none;
  z-index: 9999;
  font-weight: 600;
  animation: fadeSlide 0.4s ease forwards;
}

.popup-message.error {
  background-color: #E53E3E;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translate(-50%, -10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}