:root {
  --color-background: rgb(244, 234, 223);
  --color-text: #333;
  --color-subtext: #666;
  --color-brand: rgb(41, 106, 149);
  --color-link: #509cff;
  --color-link-highlight: #4a769a;
  --color-nav-background: rgb(244, 234, 223);
  --color-nav-text: #333;
  --color-button-background: #007aff;
  --color-button-text: #fff;
  --color-footer-text: #999;
  --color-footer-link: #666;
  --color-footer-divider: #aaa;
  --color-surface: #fff;
  --color-tab-background: rgba(255, 255, 255, 0.85);
  --color-tab-border: rgba(0, 0, 0, 0.12);
  --color-tab-hover-border: rgba(0, 0, 0, 0.2);
  --color-tab-focus-outline: rgb(41, 106, 149);
  --color-tab-active-text: #fff;
  --shadow-nav: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-card: 0 10px 20px rgba(0, 0, 0, 0.12), 0 4px 6px rgba(0, 0, 0, 0.08);
  --shadow-card-large: 0 12px 24px rgba(0, 0, 0, 0.15), 0 6px 10px rgba(0, 0, 0, 0.08);
}

/* =====================================
   Base Layout
===================================== */
html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background: var(--color-background);
  color: var(--color-text);
}

main {
  padding: 4rem 2rem 2rem;
}

.container {
  max-width: 768px;
  margin: 0 auto;
}

header,
section,
footer {
  text-align: center;
  margin-bottom: 2rem;
}

.privacy-page header,
.privacy-page section,
.contact-page header,
.contact-page section {
  text-align: left;
}

.privacy-page .site-footer,
.contact-page .site-footer {
  text-align: center;
}

.privacy-page main a,
.contact-page main a,
.presskit-page main a {
  color: var(--color-link);
}

.privacy-page main a:visited,
.contact-page main a:visited,
.presskit-page main a:visited {
  color: var(--color-link);
}

.privacy-page main a:hover,
.privacy-page main a:focus-visible,
.contact-page main a:hover,
.contact-page main a:focus-visible,
.presskit-page main a:hover,
.presskit-page main a:focus-visible {
  color: var(--color-link-highlight);
}

img.icon {
  width: 120px;
  height: 120px;
  border-radius: 24px;
}

h1 {
  font-size: 2rem;
  margin: 1rem 0 0.25rem;
}

p.subtitle {
  color: var(--color-subtext);
  margin: 0 0 1.25rem;
}

/* =====================================
   Navigation
===================================== */
.site-header {
  position: static;
  top: 0;
  inset-inline: 0;
  z-index: 1000;
  background-color: var(--color-nav-background);
  color: var(--color-nav-text);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
}

.site-header__brand {
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-nav-text);
  text-decoration: none;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: inline-block;
  color: var(--color-nav-text);
  font-size: 0.95rem;
  font-weight: 400;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: opacity 0.2s ease, text-decoration-color 0.2s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: rgba(51, 51, 51, 0.6);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-nav-text);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.35rem;
}

@media (max-width: 640px) {
  .site-header__inner {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
  }

  .site-nav__list {
    justify-content: center;
    gap: 1rem;
  }
}

/* =====================================
   Hero Actions
===================================== */
a.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-button-background);
  color: var(--color-button-text);
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  margin-top: 1.5rem;
}

/* =====================================
   Screenshot Grids
===================================== */
.screenshots > img {
  display: block;
  width: 100%;
  max-width: 400px;
  margin: 1rem auto;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
}

.screenshots-grid-iPhone {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  justify-items: center;
}

.screenshots-grid-iPhone img {
  width: 100%;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
}

.screenshots-grid-iPad {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  justify-items: center;
}

.screenshots-grid-iPad img {
  width: 100%;
  border-radius: 16px;
  box-shadow: var(--shadow-card-large);
}

.screenshots > img,
.screenshots-grid-iPhone img,
.screenshots-grid-iPad img {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  transform-origin: center;
}

.screenshots > img:hover,
.screenshots > img:focus-visible,
.screenshots-grid-iPhone img:hover,
.screenshots-grid-iPhone img:focus-visible,
.screenshots-grid-iPad img:hover,
.screenshots-grid-iPad img:focus-visible {
  transform: translateY(-4px) scale(1.03);
  box-shadow: var(--shadow-card-large);
}

/* =====================================
   Footer
===================================== */
footer {
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.875rem;
  color: var(--color-footer-link);
  background-color: transparent;
}

.site-footer a {
  margin: 0 0.5rem;
  color: var(--color-footer-link);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.site-footer .divider {
  margin: 0 0.25rem;
  color: var(--color-footer-divider);
}

/* =====================================
   Tabs
===================================== */
.tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.tab-button {
  appearance: none;
  padding: 0.5rem 1.5rem;
  border: 1px solid var(--color-tab-border);
  border-radius: 999px;
  background: var(--color-tab-background);
  color: var(--color-brand);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tab-button:hover {
  background: var(--color-surface);
  border-color: var(--color-tab-hover-border);
}

.tab-button:focus-visible {
  outline: 2px solid var(--color-tab-focus-outline);
  outline-offset: 2px;
}

.tab-button.active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-tab-active-text);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

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