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

body {
  font-family: Arial, sans-serif;
  background: #07111f;
  color: #e8f5ff;
  line-height: 1.6;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  padding: 20px 8%;
  background: rgba(7, 17, 31, 0.9);
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(12px);
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #22d3ee;
  font-weight: bold;
  font-size: 22px;
  text-decoration: none;
}

.logo img {
  width: 46px;
  height: 46px;
  object-fit: contain;
  border-radius: 8px;
}

nav {
  display: flex;
}

nav a {
  color: #cbd5e1;
  text-decoration: none;
  margin-left: 24px;
  font-size: 15px;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #22d3ee;
}

/* Hero sekcia */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 8% 80px;
  background:
    radial-gradient(circle at top right, rgba(34, 211, 238, 0.25), transparent 35%),
    linear-gradient(135deg, #07111f, #0f172a);
}

.hero-content {
  max-width: 680px;
}

.badge {
  display: inline-block;
  color: #22d3ee;
  border: 1px solid #22d3ee;
  padding: 8px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
  font-size: 14px;
}

h1 {
  font-size: 56px;
  line-height: 1.1;
  margin-bottom: 24px;
}

h2 {
  font-size: 36px;
  margin-bottom: 20px;
  color: #ffffff;
}

p {
  color: #cbd5e1;
  max-width: 760px;
}

.btn {
  display: inline-block;
  margin-top: 32px;
  background: #22d3ee;
  color: #07111f;
  padding: 14px 24px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s ease;
}

.btn:hover {
  background: #67e8f9;
}

/* Obecné sekcie */
.section {
  padding: 90px 8%;
}

/* Karty - benefity */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 30px;
}

.card {
  background: #0f172a;
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 28px;
  border-radius: 16px;
  color: #e8f5ff;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #22d3ee;
}

/* Kontaktný formulár */
.contact-section form {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  max-width: 520px;
}

input {
  flex: 1;
  padding: 14px;
  border: 1px solid #334155;
  background: #020617;
  color: #ffffff;
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.3s ease;
}

input:focus {
  outline: none;
  border-color: #22d3ee;
}

button {
  padding: 14px 22px;
  border: none;
  background: #22d3ee;
  color: #07111f;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #67e8f9;
}

#message {
  margin-top: 16px;
  color: #22d3ee;
  font-weight: 500;
}

/* Kurzovný grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 32px;
}

.course-card {
  background: #0f172a;
  border: 1px solid rgba(34, 211, 238, 0.25);
  border-radius: 18px;
  padding: 26px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.course-card:hover {
  transform: translateY(-6px);
  border-color: #22d3ee;
  box-shadow: 0 0 30px rgba(34, 211, 238, 0.15);
}

.course-card .level {
  color: #22d3ee;
  font-size: 14px;
  font-weight: bold;
  display: block;
  margin-bottom: 8px;
}

.course-card h3 {
  margin: 12px 0;
  font-size: 22px;
}

.course-card p {
  font-size: 15px;
  line-height: 1.5;
}

.course-meta {
  margin-top: 18px;
  display: flex;
  justify-content: space-between;
  color: #94a3b8;
  font-size: 14px;
}

/* Footer */
footer {
  padding: 28px 8%;
  border-top: 1px solid #1e293b;
  text-align: center;
}

/* Responzívny dizajn */
@media (max-width: 1024px) {
  .cards,
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 16px 4%;
  }

  nav {
    display: none;
  }

  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 28px;
  }

  .hero {
    padding: 100px 4% 60px;
  }

  .section {
    padding: 60px 4%;
  }

  .cards,
  .course-grid {
    grid-template-columns: 1fr;
  }

  .contact-section form {
    flex-direction: column;
  }

  input {
    width: 100%;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 24px;
  }

  .badge {
    font-size: 12px;
    padding: 6px 12px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  .card,
  .course-card {
    padding: 20px;
  }
}

.course-card {
  overflow: hidden;
  padding: 0;
}

.course-image {
  width: 100%;
  height: 220px;
  overflow: hidden;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.course-card:hover .course-image img {
  transform: scale(1.05);
}

.course-content {
  padding: 24px;
}