/* IronValue - Layout CSS: Header, Footer, Grid */

/* === Header === */
.site-header {
  background: var(--color-primary-dark);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  height: 64px;
  gap: var(--space-xl);
}
.logo img { display: block; }
.main-nav {
  display: flex;
  gap: var(--space-lg);
  flex: 1;
}
.main-nav a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-body);
  transition: color 0.15s;
}
.main-nav a:hover,
.main-nav a.active { color: #fff; }
.header-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}
.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  margin: 5px 0;
}
@media (max-width: 768px) {
  .main-nav, .header-actions { display: none; }
  .mobile-menu-toggle { display: block; }
  .site-header.menu-open .main-nav,
  .site-header.menu-open .header-actions {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-primary-dark);
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 99;
  }
  .site-header.menu-open .header-actions {
    padding-top: 0;
  }
}

/* === Footer === */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}
.footer-inner {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
}
.footer-col h4 {
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
  font-family: var(--font-heading);
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: var(--text-sm);
  padding: var(--space-xs) 0;
  font-family: var(--font-body);
  transition: color 0.15s;
}
.footer-col a:hover { color: #fff; }
.footer-tagline {
  font-size: var(--text-sm);
  margin-top: var(--space-md);
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  font-size: var(--text-xs);
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* === Grid Helpers === */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}
@media (min-width: 481px) and (max-width: 768px) {
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

/* === Hero === */
.hero {
  padding: var(--space-3xl) 0;
  background: var(--color-primary-dark);
  color: #fff;
}
.hero h1 { color: #fff; }
.hero p { color: rgba(255,255,255,0.85); }

/* === Page Header === */
.page-header {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg);
}
.page-header h1 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-sm);
}
.page-header p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* === Section Headers === */
.section-header {
  margin-bottom: var(--space-2xl);
}
.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  font-family: var(--font-heading);
}

/* === Two-column layout === */
.layout-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}
@media (max-width: 768px) {
  .layout-two-col {
    grid-template-columns: 1fr;
  }
}

/* === Centered layout (auth pages) === */
.layout-centered {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-bg-alt);
}
.layout-centered .center-card {
  width: 100%;
  max-width: 440px;
}

/* === Breadcrumb === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}
.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--color-accent); text-decoration: underline; }
.breadcrumb-sep { color: var(--color-border); }