html {
  scroll-behavior: smooth;
  background-color: var(--pico-background-color);
}

:root {
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  --clr-accent-400: var(--pico-color-cyan-400);
  --clr-accent-300: var(--pico-color-cyan-300);
  --clr-accent-200: var(--pico-color-cyan-200);
  --clr-accent-100: var(--pico-color-cyan-100);

  --ff-primary: system-ui, Avenir, Helvetica, Arial, sans-serif;;
  --ff-body: var(--ff-primary);
  --ff-heading: var(--ff-primary);

  --fw-light: 300;
  --fw-regular: 400;
  --fw-semibold: 500;
  --fw-bold: 600;

  --fs-300: 0.875rem;
  --fs-400: 0.9375rem;
  --fs-500: 1rem;
  --fs-550: 1.25rem;
  --fs-600: 1.5rem;
  --fs-650: 1.75rem;
  --fs-700: 2rem;
  --fs-800: 2.5rem;
  --fs-850: 3rem;
  --fs-900: 3.5rem;

  --fs-body: var(--fs-400);
  --fs-primary-heading: var(--fs-650);
  --fs-secondary-heading: var(--fs-600);
  --fs-tertiary-heading: var(--fs-550);
  --fs-nav: var(--fs-500);
  --fs-button: var(--fs-300);

  --size-100: 0.25rem;
  --size-200: 0.5rem;
  --size-300: 0.75rem;
  --size-400: 1rem;
  --size-500: 1.25rem;
  --size-600: 1.5rem;
  --size-700: 1.75rem;
  --size-800: 2rem;
  --size-850: 2.25rem;
  --size-900: 2.5rem;
}

body {
  font-size: var(--fs-body);
  font-family: var(--ff-body);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  background-color: var(--pico-background-color);
}

@media (min-width: 50em) {
  :root {
    --fs-body: var(--fs-500);
    --fs-primary-heading: var(--fs-800);
    --fs-secondary-heading: var(--fs-700);
    --fs-secondary-heading: var(--fs-600);
    --fs-nav: var(--fs-500);
  }
}

/* Utility classes */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.fw-bold {
  font-weight: var(--fw-bold);
}
.fw-semi-bold {
  font-weight: var(--fw-semibold);
}
.fw-regular {
  font-weight: var(--fw-regular);
}

.fs-primary-heading {
  font-size: var(--fs-primary-heading);
  line-height: 1.2;
}

.fs-secondary-heading {
  font-size: var(--fs-secondary-heading);
}

.fs-tertiary-heading {
  font-size: var(--fs-tertiary-heading);
}

.fs-300 {
  font-size: var(--fs-300);
}
.fs-400 {
  font-size: var(--fs-400);
}
.fs-500 {
  font-size: var(--fs-500);
}

/* Custom classes */
.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hstack {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  margin: 0;
  display: inline-block;
}

.app-icon {
  width: 48px;
  height: 48px;
  border-radius: 22.5%;
  object-fit: cover;
  display: block;
}

.app-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.primary-navigation[data-visible] {
  display: block;
}

.nav-list {
  font-size: var(--fs-nav);
  padding: 0;
}

.nav-list {
  display: flex;
  gap: clamp(var(--size-400), 5vw, var(--size-700));
  font-weight: var(--fw-bold);
}

.nav-list a {
  text-decoration: none;
  color: inherit;
}

.nav-list a:hover,
.nav-list a:focus {
  color: var(--clr-accent-400);
}

.hero-section {
  min-height: calc(100vh - 4rem);
  display: flex;
  align-items: center;
}

.grid-layout {
  display: grid;
  align-items: center;
  justify-items: center;
  padding: 0.5rem;
  gap: 2rem;
  grid-template-columns: 1fr 1fr;
}

.content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mock-phone {
  height: 500px;
  width: auto;
  object-fit: contain;
  max-width: 100%;
  display: block;
  margin: 0 auto;
}

.image {
  max-width: 100%;
}

@media (max-width: 50em) {
  .nav-wrapper {
    flex-direction: column;
  }

  .grid-layout {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .mock-phone {
    height: auto;
    max-height: 400px;
    width: 100%;
  }

  /* Add styles for feature grids */
  #features .grid + .grid {
    margin-top: 1rem;
  }
}

section + section {
  margin-top: var(--size-900);
}

section + section:last-of-type {
  margin-top: var(--size-800);
}

section-title {
  margin-top: var(--size-700);
  margin-bottom: var(--size-700);
}

blockquote {
  font-size: var(--fs-300);
  line-height: 1.6;
  margin: 0;
  padding: 0 0 1rem 0;
  border: 0;
  font-style: italic;
  border-left: none;
  padding-left: 0;
}

.author {
  font-size: var(--fs-300);
  margin: 0;
  color: var(--pico-muted-color);
}

@media (max-width: 768px) {
  .mock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

main.container h1 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

img[src*="app-store-download"] {
  transition: transform 0.2s ease;
}

img[src*="app-store-download"]:hover {
  transform: scale(1.05);
}