/* === Основни стилове === */
body {
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background: linear-gradient(to right, #f8f9fa, #e9ecef);
  color: #212529;
  margin: 0;
  padding: 0;
}

/* === Хедър (navbar) === */
.navbar {
  background-color: #ffffff !important;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  z-index: 999;
}

.navbar .nav-link {
  color: #003366 !important;
  font-weight: 500;
}

.navbar .nav-link:hover {
  color: #007bff !important;
}

.navbar-toggler {
  border-color: #0056b3;
}

.navbar-toggler-icon {
  background-image: none;
}

/* === Лого === */
.logo-img {
  height: 78px; /* увеличено с ~30% */
  max-height: 80px;
  transition: transform 0.3s ease;
}

.logo-img:hover {
  transform: scale(1.05);
}

/* === Hero секция === */
.hero {
  background: linear-gradient(to right, #dbe9f4, #c2dff3); /* по-меко синьо */
  height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px;
  border-bottom: none;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: bold;
  color: #003366;
  text-shadow: none;
}

.hero p {
  font-size: 1.2rem;
  color: #1f4e79;
  margin-top: 1rem;
}

/* === Hero бутон === */
.hero .btn-primary {
  background-color: #003366;
  border: 2px solid black;
  border-radius: 30px;
  padding: 10px 30px;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 1.1rem;
}

.hero .btn-primary:hover {
  background-color: white;
  color: #000;
  border-color: #000;
}

/* === Секции и заглавия === */
.section-title {
  font-size: 2rem;
  color: #003366;
  font-weight: bold;
  margin-bottom: 30px;
  text-align: center;
}

/* === Карти (cards) === */
.card {
  border: none;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
  padding: 20px;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}

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

/* === Икони в карти === */
.card-icon {
  font-size: 40px;
  color: #003366;
}

/* === Login панел === */
.login-container {
  background: linear-gradient(to right, #003366, #006699);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-container .card {
  background-color: #ffffff;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  width: 100%;
  max-width: 400px;
}

.login-container input[type="text"],
.login-container input[type="password"] {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #ced4da;
  width: 100%;
}

/* === Footer === */
footer {
  background-color: #212529;
  color: #ccc;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9rem;
}

/* === Responsive === */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

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

  .logo-img {
    height: 60px;
  }

  .navbar .nav-link {
    text-align: center;
    padding: 10px;
  }
}

/* Accordion container */
#courseAccordion .card {
  border: none;
  border-bottom: 1px solid #dee2e6;
  border-radius: 0;
  margin-bottom: 0;
  background-color: #f8f9fa;
}

/* Заглавия на секции */
#courseAccordion .card-header {
  background-color: transparent;
  border: none;
  padding: 0;
}

#courseAccordion .btn-link {
  color: #004080;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  padding: 1rem;
  display: block;
  width: 100%;
  text-align: left;
  background-color: #e9ecef;
  border-left: 4px solid #003366;
  transition: background-color 0.3s ease, border-left-color 0.3s ease;
}

#courseAccordion .btn-link:hover,
#courseAccordion .btn-link:focus {
  background-color: #d6eaff;
  border-left-color: #0056b3;
}

/* Активна секция – леко по-различна визия */
#courseAccordion .collapse.show + .card-body,
#courseAccordion .btn-link[aria-expanded="true"] {
  background-color: #e0f3ff;
  border-left-color: #0056b3;
}

/* Съдържание вътре в секцията */
#courseAccordion .card-body {
  padding: 1rem 1.25rem;
  color: #333;
  font-size: 1rem;
  background-color: #ffffff;
  border-top: 1px solid #dee2e6;
}

/* === Unified блокове за секции === */
.info-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 40px;
  padding: 30px 20px;
  background-color: #f8f9fa;
  text-align: center;
}

.info-blocks h5 {
  font-size: 1.1rem;
  font-weight: bold;
  color: #003366;
  margin-top: 10px;
}

.info-blocks p {
  font-size: 0.95rem;
  color: #444;
  margin-top: 5px;
}

.info-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 8px;
}