/* ===== BASE ===== */
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: linear-gradient(120deg, #2b2b2b, #3a3a3a);
  color: #ffffff;
}

/* ===== HEADER ===== */
header {
  text-align: center;
  padding: 40px 20px;
}

header h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

/* ===== TOGGLE ===== */
.view-toggle {
  margin-top: 20px;
}

.view-toggle button {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  padding: 10px 22px;
  cursor: pointer;
  border-radius: 8px;
  margin: 0 6px;
}

.view-toggle button.active {
  background: rgba(0,255,255,0.5);
  color: #000;
}

/* ===== CATÉGORIES ===== */
.category {
  max-width: 1200px;
  margin: 50px auto;
}

.category h2 {
  font-size: 28px;
  margin: 20px;
  border-left: 4px solid cyan;
  padding-left: 12px;
}

/* ===== MODE GRID ===== */
#courses.grid .category {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

#courses.grid .category h2 {
  grid-column: 1 / -1;
}

/* ===== CARTE COURS (GLASSMORPHIC) ===== */
.course-card {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
  transition: transform 0.3s ease;
}

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

.course-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.course-content {
  padding: 20px;
}

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

.tagline {
  color: cyan;
  font-size: 14px;
  margin: 8px 0;
}

.desc {
  font-size: 15px;
  opacity: 0.9;
}

/* ===== MODE LISTE ===== */
#courses.list .category {
  display: block;
}

#courses.list .course-card {
  display: flex;
  margin: 20px;
}

#courses.list .course-card img {
  width: 220px;
  height: auto;
}