* {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-color);
  font-family: var(--font-family);
  color: var(--text-primary);
  margin: 0;
  display: grid;
  grid-template-areas:
    "header"
    "main"
    "aside";
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header {
  grid-area: header;
  padding: var(--spacing-2) var(--spacing-3);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

body.dark-mode header {
  background: rgba(30, 41, 59, 0.7);
}

.brand-logo {
  height: 40px;
  width: auto;
}

main {
  grid-area: main;
  padding: var(--spacing-3);
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

.meal-log {
  grid-area: aside;
  padding: var(--spacing-3);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-color);
}

body.dark-mode .meal-log {
  background: rgba(30, 41, 59, 0.8);
}


@media (min-width: 1024px) {
  body {
    grid-template-areas:
      "header header"
      "main aside";
    grid-template-columns: 3fr 1fr;
    grid-template-rows: auto 1fr;
  }

  .meal-log {
    border-top: none;
    border-left: 1px solid var(--border-color);
    background-color: var(--surface-color);
    backdrop-filter: none;
  }

  body.dark-mode .meal-log {
    background-color: var(--surface-color);
  }
}