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


body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background-color: #f4f6f8;
  color: #2c3e50;
  line-height: 1.8;
}


header {
  background-color: #ffffff;
  padding: 1.5rem 3rem;
  border-bottom: 2px solid #00bfa6;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}


header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #00bfa6;
}


nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #555;
  font-weight: 500;
  transition: color 0.3s ease, border-bottom 0.3s ease;
  padding-bottom: 4px;
}


nav a:hover {
  color: #00bfa6;
  border-bottom: 2px solid #00bfa6;
}


.container {
  max-width: 1000px;
  margin: auto;
  padding: 3rem 2rem;
}


.container h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}


.container p {
  margin-bottom: 2rem;
  color: #444;
}


footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  color: #777;
  border-top: 1px solid #ddd;
  margin-top: 4rem;
}


.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}


.card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}


.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}


.card h3 {
  margin-bottom: 1rem;
}


/* Subject colors */
.card.math { border-left: 6px solid #0097a7; }
.card.english { border-left: 6px solid #43a047; }
.card.languages { border-left: 6px solid #8e24aa; }
.card.science { border-left: 6px solid #fb8c00; }
.card.history { border-left: 6px solid #e53935; }


/* Slider styles */
.slider-container {
  margin-top: 3rem;
  margin-bottom: 2rem;
}


.slider-container label {
  font-weight: bold;
  display: block;
  margin-bottom: 1rem;
}


.slider-container input[type=range] {
  width: 100%;
}


.curriculum {
  margin-top: 2rem;
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.05);
}


ul {
  padding-left: 1.5rem;
}


.contact {
  margin-top: 3rem;
  padding: 1.5rem;
  background: #e0f7f5;
  border-radius: 10px;
}
.contact a {
  color: #00bfa6;
  font-weight: bold;
  text-decoration: none;
}
.contact a:hover {
  text-decoration: underline;
}