.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background: rgba(10, 12, 16, 0.72);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
}

.main-content {
  flex: 1;
  padding: 0 24px 60px;
  max-width: 1920px;
  width: 100%;
  margin: 0 auto;
}

.pins-masonry {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  width: 100%;
}

.pins-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

@media (max-width: 900px) {
  .pins-masonry {
    gap: 12px;
  }
  .pins-col {
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .header {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(10, 12, 16, 0.95);
  }
}

@media (max-width: 640px) {
  .header {
    padding: 0 12px;
    gap: 8px;
    height: 54px;
  }
  .main-content {
    padding: 0 8px 95px;
  }
  .pins-masonry {
    gap: 8px;
  }
  .pins-col {
    gap: 8px;
  }
}