/* CONTAINER CHÍNH */
.friends-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 20px;
}

.friends-header {
  text-align: center;
  color: #e91e63;
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  animation: floatUpDown 2s ease-in-out infinite;
}

@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

/* GRID CHÍNH */
.friends-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 20px;
  overflow: visible;
}

/* CARD */
.friend-card {
  background: #fff;
  border: 2px solid #fce4ec;
  border-radius: 14px;
  padding: 15px;
  text-align: center;
  transition: all 0.3s ease;
  display: grid;
  grid-template-rows: auto;
  gap: 12px;
  overflow: hidden;
}

.friend-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 12px rgba(255, 100, 180, 0.3);
}

/* KHI MỞ RỘNG */
.friend-card.expanded {
  grid-row: span 2;
  background: #fff8f9;
  border-color: #e91e63;
  box-shadow: 0 8px 25px rgba(233, 30, 99, 0.18);
  z-index: 5;
  padding: 18px;
}

/* VIEW MẶC ĐỊNH */
.friend-view {
  display: grid;
  gap: 8px;
  align-content: start;
}

.friend-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #e91e63;
  cursor: pointer;
  margin: 0 auto;
  transition: transform 0.2s;
}

.friend-avatar:hover {
  transform: scale(1.08);
}

.friend-name {
  font-size: 1rem;
  font-weight: bold;
  color: #e91e63;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.friend-message-btn {
  display: inline-block;
  padding: 6px 12px;
  background: #2196f3;
  color: white;
  font-size: 0.9rem;
  font-weight: bold;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.friend-message-btn:hover {
  background: #1976d2;
  transform: scale(1.05);
}

/* MENU PANEL */
.friend-menu-panel {
  display: none;
  grid-column: 1 / -1;
  animation: slideDown 0.3s ease;
}

.friend-card.expanded .friend-view {
  display: none;
}

.friend-card.expanded .friend-menu-panel {
  display: grid;
  gap: 8px;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* NÚT TRỞ LẠI */
.back-btn {
  width: 100%;
  background: #f5f5f5;
  border: 1px solid #ddd;
  padding: 10px;
  border-radius: 10px;
  font-weight: bold;
  font-size: 0.95rem;
  cursor: pointer;
  transition: 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.back-btn:hover {
  background: #e0e0e0;
}

/* MENU ITEM */
.friend-menu-item {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  font-weight: bold;
  cursor: pointer;
  border-radius: 10px;
  font-size: 0.95rem;
  transition: 0.2s;
  background: #fdf2f8;
  border: 1px solid #fce4ec;
}

.friend-menu-item:hover {
  background: #fce4ec;
  transform: translateX(4px);
}

/* ICON CHUNG TRONG MENU ITEM */
.friend-menu-item i {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  margin-right: 8px;
  color: #e91e63;
  transition: 0.2s;
}

/* ICON HOVER – NHẢY NHẸ */
.friend-menu-item:hover i {
  transform: translateX(2px);
}

/* ICON NÚT TRỞ LẠI */
.back-btn i {
  font-size: 1rem;
  color: #616161;
}

/* HỦY KẾT BẠN – MÀU ĐỎ */
.friend-menu-item.unfriend-btn i {
  color: #d32f2f;
}

/* TRẠNG THÁI RỖNG */
.no-friends {
  text-align: center;
  color: #777;
  font-size: 1.2rem;
  margin-top: 2rem;
  grid-column: 1 / -1;
}

/* LOADING */
.loading-spinner {
  display: none;
  margin: 2rem auto;
  border: 8px solid #f3f3f3;
  border-top: 8px solid #e91e63;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  grid-column: 1 / -1;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* MOBILE */
@media (max-width: 768px) {
  .friends-list {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 16px;
  }

  .friend-card {
    padding: 12px;
  }

  .friend-card.expanded {
    padding: 15px;
  }

  .friend-avatar {
    width: 50px;
    height: 50px;
  }

  .friend-name {
    font-size: 0.9rem;
  }

  .friend-message-btn {
    padding: 5px 10px;
    font-size: 0.8rem;
  }

  .friend-menu-item {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
}