/* Zero Dollar Budget — color scheme aligned with iOS app (navy + green) */
:root {
  /* iOS AppNavy — nav/tab bars, primary surfaces */
  --app-navy: #1b2d42;
  --app-navy-dark: #152638;
  /* iOS AppNavyLight — cards, secondary surfaces */
  --app-navy-light: #2c3e56;
  --app-navy-light-dark: #23354c;
  /* iOS AppBackground — main screen background */
  --app-background: #f1f3f6;
  --app-background-dark: #0d1117;
  /* iOS AccentColor — primary actions, links */
  --app-accent: #34c754;
  --app-accent-dark: #4cd766;
  /* Text on navy */
  --navy-bar-text: #ffffff;
  --navy-bar-secondary: rgba(255, 255, 255, 0.7);
  /* Content text */
  --text-primary: #1a1a1a;
  --text-primary-dark: #e8e8e8;
  --text-secondary: #555;
  --text-secondary-dark: rgba(255, 255, 255, 0.7);
  /* Borders / dividers */
  --border: #e0e4e8;
  --border-dark: #2c3e56;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
  padding: 0;
  color: var(--text-primary);
  background: var(--app-background);
}

/* Navy header bar — matches iOS nav bar, full width */
.site-header {
  background: var(--app-navy);
  color: var(--navy-bar-text);
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  margin-bottom: 1.5rem;
  padding: 1rem 1.5rem;
  padding-left: max(1.5rem, calc(50vw - 360px + 1.5rem));
  padding-right: max(1.5rem, calc(50vw - 360px + 1.5rem));
  box-sizing: border-box;
}

.site-header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-header p {
  margin: 0.25rem 0 0;
  color: var(--navy-bar-secondary);
  font-size: 0.95rem;
}

/* Header link — click title bar to return home */
.site-header-link {
  display: block;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.site-header-link:hover {
  text-decoration: none;
}

main {
  padding: 0 1.5rem 1.5rem;
}

h1:not(.site-header h1) {
  font-size: 1.75rem;
  margin-top: 0;
  color: var(--app-navy);
}

h2 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  color: var(--app-navy);
}

p, ul {
  margin: 0.75rem 0;
}

ul {
  padding-left: 1.5rem;
}

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

a:hover {
  text-decoration: underline;
}

a:visited {
  color: #2da34a;
}

nav {
  margin: 1.5rem 0;
  padding: 0;
}

nav ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

nav li {
  margin: 0.5rem 0;
}

nav a {
  color: var(--app-accent);
  font-weight: 500;
}

.page-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.copyright {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Dark mode — matches iOS dark appearance */
@media (prefers-color-scheme: dark) {
  :root {
    --app-navy: #152638;
    --app-navy-light: #23354c;
  }

  body {
    color: var(--text-primary-dark);
    background: var(--app-background-dark);
  }

  .site-header {
    background: var(--app-navy);
  }

  h1:not(.site-header h1),
  h2 {
    color: var(--navy-bar-text);
  }

  a {
    color: var(--app-accent-dark);
  }

  a:visited {
    color: #5ee67a;
  }

  nav a {
    color: var(--app-accent-dark);
  }

  .page-footer {
    border-top-color: var(--border-dark);
    color: var(--text-secondary-dark);
  }

  .copyright {
    color: var(--text-secondary-dark);
  }
}