/* =========================
   QUELLE INSTITUT - PURPLE BRAND
========================= */

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

/* BODY */
body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: #ffffff;
  color: #1F2933;
  line-height: 1.6;
}

/* CONTAINER */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* SECTION */
.section {
  padding: 90px 0;
}

.section h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 30px;
  color: #5E2CA5;
}

.light-bg {
  background-color: #F5F3FA;
}

/* =========================
   NAVBAR
========================= */
.navbar {
  background-color: #5E2CA5;
  padding: 20px 0;
}

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

.logo {
  color: #ffffff;
  font-size: 1.6rem;
  font-weight: bold;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
}

nav a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s ease;
}

nav a:hover {
  opacity: 0.8;
}

/* =========================
   HERO SECTION
========================= */
.hero {
  background: linear-gradient(135deg, #5E2CA5, #3E1C72);
  color: #ffffff;
  padding: 140px 0;
  text-align: center;
}

.hero h2 {
  font-size: 2.8rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 40px;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

/* =========================
   BUTTONS
========================= */
.btn-primary {
  background-color: #C62828;
  color: #ffffff;
  padding: 14px 35px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  display: inline-block;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: #a81f1f;
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: #5E2CA5;
  color: #ffffff;
  padding: 12px 30px;
  text-decoration: none;
  border-radius: 6px;
  display: inline-block;
}

/* =========================
   ABOUT
========================= */
#about p {
  max-width: 750px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.05rem;
}

/* =========================
   COURSES
========================= */
.course-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 50px;
  flex-wrap: wrap;
}

.course-card {
  background-color: #ffffff;
  padding: 40px 30px;
  width: 320px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  text-align: center;
  border-top: 5px solid #5E2CA5;
  transition: transform 0.3s ease;
}

.course-card:hover {
  transform: translateY(-6px);
}

.course-card.red-accent {
  border-top: 5px solid #C62828;
}

.course-card h3 {
  margin-bottom: 20px;
  font-size: 1.3rem;
  color: #5E2CA5;
}

.course-card.red-accent h3 {
  color: #C62828;
}

.course-card ul {
  list-style: none;
}

.course-card li {
  margin-bottom: 12px;
}

/* =========================
   TESTIMONIALS
========================= */
blockquote {
  max-width: 650px;
  margin: 25px auto;
  text-align: center;
  font-style: italic;
  font-size: 1.05rem;
  padding: 20px;
  border-left: 4px solid #5E2CA5;
  background-color: #ffffff;
  box-shadow: 0 5px 20px rgba(0,0,0,0.04);
}

/* =========================
   CONTACT
========================= */
#contact {
  text-align: center;
}

#contact p {
  margin: 10px 0;
  font-size: 1rem;
}

/* =========================
   FOOTER
========================= */
footer {
  background-color: #3E1C72;
  color: #ffffff;
  text-align: center;
  padding: 25px 0;
  margin-top: 50px;
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 768px) {

  .nav-container {
    flex-direction: column;
    gap: 15px;
  }

  nav ul {
    flex-direction: column;
    gap: 15px;
  }

  .hero h2 {
    font-size: 2.2rem;
  }

  .course-grid {
    flex-direction: column;
    align-items: center;
  }

  .course-card {
    width: 90%;
  }

  .section {
    padding: 70px 20px;
  }
}