/* layout.css — STRUCTURAL PATTERNS
 * Grid, flexbox, responsive breakpoints.
 * Translates semantic class names into layout using theme variables.
 * Order: linked after theme.css, before components.css.
 */

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--size-body);
  font-weight: var(--weight-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container — grids at 960px, reading text at 640px */
.container {
  width: 100%;
  max-width: var(--max-width-grid);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.container--narrow {
  max-width: var(--max-width-reading);
}

/* Sections — 96px desktop, 72px tablet, 56px mobile.
   Generous spacing says "I'm not rushing you." */
.section {
  padding: var(--space-lg) 0;
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-white);
}

/* Navigation — four items only, no dropdowns, no hamburger.
   Mike doesn't hide anything. */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__brand {
  font-family: var(--font-heading);
  font-size: var(--size-h3);
  font-weight: var(--weight-heading);
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-heading);
}

.nav__links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--size-small);
  font-weight: var(--weight-medium);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* Hero — full-width container, text constrained to 720px.
   Headline is "Mike McWilliams" — he is the brand. */
.hero {
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero__inner {
  max-width: var(--max-width-hero);
  margin: 0 auto;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--size-h1);
  font-weight: var(--weight-h1);
  line-height: var(--line-height-h1);
  letter-spacing: var(--letter-spacing-h1);
  margin-bottom: var(--space-sm);
}

.hero__subtitle {
  font-size: var(--size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-secondary);
  max-width: var(--max-width-reading);
  margin: 0 auto var(--space-md);
}

/* About / Credentials */
.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.about__bio {
  max-width: var(--max-width-reading);
}

.about__credentials {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* Audience — cards at 24px gap desktop */
.audience__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
  margin-top: var(--space-md);
}

/* Pricing — cards at 24px gap desktop */
.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
  margin-top: var(--space-md);
}

.pricing__grid--two {
  grid-template-columns: repeat(2, 1fr);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Contact */
.contact__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

/* Footer — minimal. Copyright + boundary statement. No social links. */
.footer {
  padding: var(--space-md) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
  font-size: var(--size-small);
  color: var(--color-text-secondary);
}

/* Tablet: max-width 768px */
@media (max-width: 768px) {
  .section {
    padding: var(--space-lg-tablet) 0;
  }

  .hero {
    padding: var(--space-lg) 0;
  }

  .about__content {
    grid-template-columns: 1fr;
  }

  .audience__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--card-gap-mobile);
  }

  .pricing__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--card-gap-mobile);
  }

  .pricing__grid--two {
    max-width: 100%;
  }

  .contact__content {
    grid-template-columns: 1fr;
  }

  .nav__links {
    gap: var(--space-sm);
  }
}

/* Mobile: max-width 480px */
@media (max-width: 480px) {
  :root {
    --size-h1: 2.25rem;
    --size-h2: 1.5rem;
  }

  .section {
    padding: var(--space-lg-mobile) 0;
  }

  .hero {
    padding: var(--space-lg-tablet) 0;
  }

  .about__credentials {
    display: none;
  }

  .audience__grid {
    grid-template-columns: 1fr;
  }

  .audience-card:nth-child(3),
  .audience-card:nth-child(4),
  .audience-card:nth-child(5) {
    display: none;
  }

  .pricing__grid {
    grid-template-columns: 1fr;
  }

  /* Nav stays visible — no hamburger. Items wrap naturally. */
  .nav__inner {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .nav__links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }

  .hero__cta {
    flex-direction: column;
    align-items: center;
  }
}