body {
  background: #f4f6fa;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1000px;
  margin: 40px auto;
  padding: 20px;
  text-align: center;
}

.center-circle {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, #0fc9e7, #7d5fff);
  border-radius: 50%;
  margin: 0 auto 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 0 15px rgba(0,0,0,0.2);
}

.center-text .icon {
  font-size: 28px;
  margin-bottom: 5px;
}

.app-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}


.app-item:hover {
  transform: translateY(-6px);
  box-shadow:
    0 8px 18px rgba(0,0,0,0.25),
    0 4px 8px rgba(0,0,0,0.2),
    inset 0 0 10px rgba(255,255,255,0.1);
  opacity: 0.95;
}


.app-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 220px;
  height: 120px;
  padding: 15px;
  color: white;
  text-decoration: none;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  transition: transform 0.3s;
  text-align: center;
  margin: 10px;
}

.app-item:hover {
  transform: scale(1.05);
}

.app-icon {
  font-size: 28px;
  margin-bottom: 6px;
}

.app-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 4px;
}

.app-desc {
  font-size: 12px;
  font-weight: 100;
  opacity: 0.9;
}

.app-group {
  margin-bottom: 40px;
}

.app-group h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #333;
}


/* Màu riêng cho từng app */
/* Gradient nền cho từng app-item */
.orange {
  background: linear-gradient(135deg, #FF9800, #E65100);
}
.pink {
  background: linear-gradient(135deg, #EC407A, #AD1457);
}
.purple {
  background: linear-gradient(135deg, #AB47BC, #6A1B9A);
}
.blue {
  background: linear-gradient(135deg, #42A5F5, #1565C0);
}
.cyan {
  background: linear-gradient(135deg, #26C6DA, #00838F);
}
.green {
  background: linear-gradient(135deg, #66BB6A, #2E7D32);
}
.yellow {
  background: linear-gradient(135deg, #FDD835, #F57F17);
}
.red {
  background: linear-gradient(135deg, #EF5350, #B71C1C);
}
.teal {
  background: linear-gradient(135deg, #26A69A, #004D40);
}
.gray {
  background: linear-gradient(135deg, #78909C, #37474F);
}
.indigo {
  background: linear-gradient(135deg, #5C6BC0, #1A237E);
}
.brown {
  background: linear-gradient(135deg, #8D6E63, #4E342E);
}