*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: 16px;
}

img {
  max-width: 100%;
  display: block;
}

.hidden {
  display: none !important;
}

.fade-in {
  /* no animation — instant render for speed */
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg, var(--grey-300) 25%, var(--grey-100) 50%, var(--grey-300) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-blue {
  border-color: rgba(37, 99, 235, 0.2);
  border-top-color: var(--blue-600);
}

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

.page-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-content {
  flex: 1;
  overflow-y: auto;
}

.page-appbar {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-800));
  color: var(--white);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.page-appbar h1 {
  font-size: 18px;
  font-weight: 700;
  flex: 1;
}

.page-appbar .back-btn {
  color: var(--white);
  display: flex;
  align-items: center;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.page-appbar .back-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
}

.empty-state .empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--grey-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.empty-state .empty-icon .material-icons-round {
  font-size: 40px;
  color: var(--grey-400);
}

.empty-state h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 14px;
}

@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }
}

@media (min-width: 1200px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr) !important;
  }
}