/* ==========================================================================
   Shared Layout and Navigation — matthewheyman.com v2
   ========================================================================== */

/* Semantic layout (header, main, footer) and navigation used by all pages.
   CSS Zen Garden: structure in HTML, presentation in CSS. */

/* ==========================================================================
   1. Page Layout
   ========================================================================== */

html {
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
}

.site-main {
  min-width: 0;
  max-width: 100%;
}

/* Prevent long URLs/words from causing horizontal scroll on small screens */
.site-main,
.site-header__inner,
.site-footer__inner {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header__inner {
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Main content */
.site-main {
  flex: 1;
  padding-top: var(--space-12);
  padding-bottom: var(--space-20);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-8) var(--space-6);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

.site-footer__inner {
  max-width: var(--max-width-xl);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-footer__links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links a {
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   2. Navigation
   ========================================================================== */

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-nav__list {
  display: flex;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__item {
  /* Item wrapper */
}

.site-nav__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-secondary);
  text-decoration: none;
}

.site-nav__link:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

/* Active state (current page) */
.site-nav__link[aria-current="page"],
.site-nav__link.active {
  color: var(--color-accent-primary);
  background: var(--color-bg-elevated);
}

/* Logo/Brand */
.site-brand {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-tight);
  transition: color var(--transition-fast);
}

.site-brand:hover {
  color: var(--color-accent-primary);
  text-decoration: none;
}

/* "Hey" in Heyman: persistent brand highlight on all pages */
.site-brand .brand-hey,
.site-brand:hover .brand-hey {
  color: rgb(168, 199, 255);
}

/* ==========================================================================
   3. Mobile Navigation (Responsive)
   ========================================================================== */

/* Mobile menu toggle (hidden by default; shown on mobile if needed) */
.site-nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border-medium);
  color: var(--color-text-primary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav__toggle:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-medium);
}

.site-nav__toggle:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
  
  /* Show toggle button on mobile */
  .site-nav__toggle {
    display: block;
  }
  
  /* Nav list: hidden by default on mobile; shown when toggled */
  .site-nav__list {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: var(--space-1);
    padding-top: var(--space-4);
  }
  
  /* When menu is open (requires JS or :target; fallback: always visible without JS) */
  .site-nav__list.is-open,
  .site-nav:target .site-nav__list {
    display: flex;
  }
  
  /* Fallback: if no JS, show nav by default on mobile (core nav without JS) */
  @supports not (selector(:has(*))) {
    .site-nav__list {
      display: flex;
    }
  }
  
  .site-nav__link {
    width: 100%;
    text-align: left;
  }
  
  .site-footer__inner {
    flex-direction: column;
    text-align: center;
  }
  
  .site-footer {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

/* Extra-tight padding on narrow phones (e.g. iPhone) so content fits without horizontal scroll */
@media (max-width: 480px) {
  .site-header__inner {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
  
  .site-footer {
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
}

/* ==========================================================================
   4. Skip Link (Accessibility)
   ========================================================================== */

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  text-decoration: none;
  z-index: 1000;
  transform: translateY(-200%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}