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

/* ===== BASE ===== */
body {
  font-family: "Poppins", sans-serif;
  background: #f3f6ff;
  display: flex;
  justify-content: center;
  padding: 80px 20px;
}

h1 {
  font-family: "Merriweather", serif;
  font-size: 32px;
  color: #1e2246;
  text-align: center;
  margin-bottom: 50px;
}

/* ===== GRID ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

/* ===== CARD ===== */
.card {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(180, 191, 225, 0.4);
  transition: all 0.3s ease;
  cursor: pointer;
}

/* Hover + Active */
.card:hover {
  transform: translateY(-5px);
}

/* ===== CARD TOP ===== */
.card-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-bottom: 30px;
}

.card h3 {
  font-size: 22px;
  color: #1e2246;
}

/* ===== ICON ===== */
.icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
}
.icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon i {
  font-size: 26px;
  color: black;
}

/* màu nền */
.icon.blue {
  background: linear-gradient(135deg, #cfd2ff, #b3b6e6);
}

/* Gradient màu */
.blue {
  background: linear-gradient(135deg, #bbcbfb, #f1d5ff);
}
.pink {
  background: linear-gradient(135deg, #fbbbda, #ffd5d5);
}
.purple {
  background: linear-gradient(135deg, #bbebfb, #efd5ff);
}
.green {
  background: linear-gradient(135deg, #bbfbe4, #d5e0ff);
}
.mix {
  background: linear-gradient(135deg, #bbd8fb, #ffd5d5);
}
.orange {
  background: linear-gradient(135deg, #ffdec7, #d5d9ff);
}

/* ===== BUTTON ===== */
.btn {
  padding: 14px;
  border: 1px solid #c2c5e2;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
  cursor: pointer;
}

/* Hover */
.btn:hover {
  background: #1e2246;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(30, 34, 70, 0.3);
}

/* Active */
.btn.dark {
  background: #1e2246;
  color: #fff;
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  margin-top: 60px;
  color: #1e2246;
  opacity: 0.7;
  max-width: 700px;
  margin-inline: auto;
}