/**
 * Layout Utilities for TerraSentri Site
 * Container, grid, and flexbox utilities for responsive layouts
 */

.container {
  width: 100%;
  max-width: var(--container-max-width, 1280px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-mobile, 1rem);
  padding-right: var(--container-padding-mobile, 1rem);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--container-padding, 1.5rem);
    padding-right: var(--container-padding, 1.5rem);
  }
}

@media (min-width: 1280px) {
  .container {
    padding-left: var(--spacing-2xl, 3rem);
    padding-right: var(--spacing-2xl, 3rem);
  }
}

/* ============================================
   SITE HEADER & NAVIGATION
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: var(--z-index-sticky);
  background-color: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

.site-header.is-scrolled {
  background-color: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding-mobile);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

@media (min-width: 1024px) {
  .header-container {
    padding: 0 var(--container-padding);
  }
}

.logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--transition-transform);
}

.logo a:hover {
  transform: scale(1.02);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: var(--font-weight-extrabold);
  letter-spacing: -0.05em;
  color: var(--color-text-primary);
  text-transform: none;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.header-nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-colors);
}

.header-nav a:hover {
  color: var(--color-text-primary);
}

.header-nav .nav-cta {
  background-color: var(--color-primary);
  color: #0d0d0d;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-xxl);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.2);
}

.header-nav .nav-cta:hover {
  color: #0d0d0d;
  filter: brightness(0.9);
  transform: translateY(-1px);
}

@media (max-width: 767px) {
  .header-nav {
    display: none;
  }
}

/* Hamburger toggle button */
.hamburger-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}

.hamburger-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.hamburger-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: var(--transition-all);
}

/* Hamburger × animation when open */
.hamburger-toggle.is-open .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-toggle.is-open .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger-toggle.is-open .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
.mobile-nav {
  display: none;
}

.mobile-nav[aria-hidden="false"] {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg-card);
  width: 100%;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-colors);
}

.mobile-nav a:hover {
  color: var(--color-text-primary);
}

.mobile-nav .nav-cta {
  background-color: var(--color-primary);
  color: #0d0d0d;
  margin: var(--spacing-sm) var(--spacing-md) 0;
  border-radius: var(--radius-xxl);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
}

.mobile-nav .nav-cta:hover {
  color: #0d0d0d;
  filter: brightness(0.9);
}

@media (max-width: 767px) {
  .hamburger-toggle {
    display: flex;
  }
}

@media (min-width: 768px) {
  .hamburger-toggle {
    display: none;
  }

  .mobile-nav {
    display: none !important;
  }
}

/* ============================================
   GRID & FLEX UTILITIES
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.flex { display: flex; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-col { flex-direction: column; }

/* ============================================
   SPACING UTILITIES
   ============================================ */

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-2xl { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }