/* HES Tuyển Sinh - Custom Styles */

html {
  scroll-behavior: smooth;
}

/* Hero gradient */
.hero-gradient {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #1d4ed8 100%);
}

/* Card hover effect */
.program-card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.program-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(30, 58, 138, 0.15);
}

/* Nav link active */
.nav-link {
  position: relative;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #1e40af;
  transition: width 0.2s ease;
}
.nav-link:hover::after {
  width: 100%;
}

/* Mobile menu */
#mobile-menu {
  display: none;
}
#mobile-menu.open {
  display: block;
}

/* Image placeholder */
.img-placeholder {
  background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  border-radius: 12px;
}

/* Form focus */
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Table striped */
.table-striped tr:nth-child(even) {
  background-color: #f8fafc;
}

/* Admin sidebar */
.sidebar-link {
  transition: background-color 0.15s ease, color 0.15s ease;
}
.sidebar-link:hover, .sidebar-link.active {
  background-color: #1e40af;
  color: white;
}