/* =====================
   BASE
===================== */
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  color: #1e293b;
  background: #ffffff;
  line-height: 1.7;
}
h1{
    color: white;
    
}
h2, h3 {
  margin-bottom: 15px;
  color: #020617;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 60px 20px;
}

/* =====================
   HERO
===================== */
.presentation-hero {
  height: 70vh;
  background: url("../img/classbk3.jpeg") center/cover no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.presentation-hero .overlay {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.7);
}
.hero-logo {
  max-width: 170px;
  height: auto;
  margin-bottom: 15px;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.3));
}
.hero-content {
  position: relative;
  color: #ffffff;
  text-align: center;
  z-index: 1;
}

.hero-content h1 {
  font-size: 8rem;
}

.hero-content p {
  font-size: 1.2rem;
  opacity: 0.9;
}

/* =====================
   SECTIONS
===================== */
.presentation-section {
  background: #ffffff;
  color: black;
}

.presentation-section.light {
  background: #f8fafc;
}

/* =====================
   GRID & CARDS
===================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.card {
  background: #ffffff;
  padding: 30px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.card ul {
  padding-left: 20px;
}

.card li {
  margin-bottom: 8px;
}

/* =====================
   INFO BOXES
===================== */
.info-box {
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: #ffffff;
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

/* =====================
   CTA
===================== */
.presentation-cta {
  background: linear-gradient(135deg, #020617, #1e293b);
  color: #ffffff;
  text-align: center;
  padding: 80px 20px;
}

.presentation-cta h2 {
  font-size: 2.2rem;
}

.presentation-cta p {
  opacity: 0.85;
  margin-bottom: 30px;
}

.btn-primary {
  background: #facc15;
  color: #020617;
  padding: 15px 35px;
  border-radius: 50px;
  font-weight: bold;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 25px rgba(250, 204, 21, 0.4);
}

/* =====================
   RESPONSIVE
===================== */
@media (max-width: 460px) {
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .hero-logo {
  max-width: 100px;
  height: auto;
  margin-bottom: 10px;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.3));
}
}