:root {
  --cream: #fffef9;
  --cream-dark: #f5f3eb;
  --mint: #85e0c2;
  --teal: #4db69e;
  --teal-dark: #2e8b75;
  --text: #1a4a40;
  --text-muted: #4a6b63;
  --border: #d8ebe4;
  --white: #ffffff;
  --shadow: 0 8px 24px rgba(26, 74, 64, 0.08);
  --shadow-hover: 0 12px 32px rgba(26, 74, 64, 0.12);
  --icon-shadow: 0 4px 12px rgba(26, 74, 64, 0.12);
  --link: var(--teal-dark);
  --radius: 16px;
  --max-width: 960px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --cream: #0f1816;
    --cream-dark: #1a2825;
    --mint: #6fd4b4;
    --teal: #5ec4a8;
    --teal-dark: #85e0c2;
    --text: #e8f5f1;
    --text-muted: #9bb8b0;
    --border: #2a403c;
    --white: #162522;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
    --icon-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    --link: #85e0c2;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --cream: #0f1816;
  --cream-dark: #1a2825;
  --mint: #6fd4b4;
  --teal: #5ec4a8;
  --teal-dark: #85e0c2;
  --text: #e8f5f1;
  --text-muted: #9bb8b0;
  --border: #2a403c;
  --white: #162522;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.45);
  --icon-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  --link: #85e0c2;
  color-scheme: dark;
}

:root[data-theme="light"] {
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.6;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--white);
}

.site-header__inner,
.page {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand:hover {
  text-decoration: none;
  color: var(--link);
}

.site-nav a {
  margin-left: 1.25rem;
  font-weight: 500;
  color: var(--text-muted);
}

.site-nav a:hover {
  color: var(--link);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--white);
  color: var(--text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--link);
  border-color: var(--teal);
  background: var(--cream-dark);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

main {
  padding: 3rem 0 4rem;
}

.hero {
  text-align: center;
  margin-bottom: 3rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0 auto;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: 1.125rem;
}

.section-title {
  margin: 0 0 1.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.app-grid {
  display: grid;
  gap: 1.25rem;
}

.app-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.app-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  text-decoration: none;
}

.app-card__icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: var(--icon-shadow);
}

.app-card__title {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  color: var(--text);
}

.app-card__desc {
  margin: 0;
  color: var(--text-muted);
}

.app-card__arrow {
  font-size: 1.5rem;
  color: var(--teal);
}

.app-hero {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 2.5rem;
}

.app-hero__icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.app-hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.app-hero__tagline {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.125rem;
}

.content-card {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.content-card h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.25rem;
}

.content-card h2:first-child {
  margin-top: 0;
}

.content-card p,
.content-card li {
  color: var(--text-muted);
}

.content-card ul {
  padding-left: 1.25rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.75rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.75rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--mint);
  border: 2px solid var(--teal);
}

.store-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  line-height: 1.25;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background 0.15s ease, color 0.15s ease;
}

.button--primary {
  background: var(--teal);
  color: var(--white);
}

.button--primary:hover {
  background: var(--teal-dark);
  text-decoration: none;
}

.button--secondary {
  background: var(--white);
  color: var(--link);
  border-color: var(--border);
}

.button--secondary:hover {
  background: var(--cream-dark);
  text-decoration: none;
}

.button--disabled {
  background: var(--cream-dark);
  color: var(--text-muted);
  cursor: default;
}

.button__icon {
  width: 1rem;
  height: 1rem;
  flex: 0 0 1rem;
  display: block;
  overflow: hidden;
  margin-right: 0.5rem;
}

.breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--link);
}

.legal-content h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.125rem;
  color: var(--text);
}

.legal-content h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1rem;
  color: var(--text);
}

.legal-content h3:first-of-type {
  margin-top: 0.75rem;
}

.legal-content p,
.legal-content li {
  color: var(--text-muted);
}

.placeholder-notice {
  padding: 1rem 1.25rem;
  border-radius: 12px;
  background: var(--cream-dark);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

@media (max-width: 640px) {
  .app-card {
    grid-template-columns: auto 1fr;
  }

  .app-card__arrow {
    display: none;
  }

  .app-hero {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }

  .site-nav a {
    margin-left: 0.75rem;
    font-size: 0.9375rem;
  }

  .content-card {
    padding: 1.25rem;
  }
}