/* ===================================
   LAYOUT STYLES - GRID, HEADER, FOOTER, SECTIONS
   =================================== */

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-primary);
  height: var(--header-height);
  transition: background-color var(--transition-normal);
}

.site-header.scrolled {
  background-color: rgba(10, 10, 15, 0.98);
  box-shadow: var(--shadow-lg);
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--container-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.header-brand {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.header-brand:hover {
  color: var(--color-primary-light);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: var(--font-size-sm);
  text-decoration: none;
  padding: var(--space-sm) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: all var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border-primary);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 999;
    transition: all var(--transition-normal);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border-secondary);
  }

  .nav-link:last-child {
    border-bottom: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .nav-actions .btn {
    display: none;
  }
}



/* ===================================
   MAIN CONTENT LAYOUT
   =================================== */

.main-content {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* Section Layouts */
.section {
  padding: var(--section-spacing) 0;
  position: relative;
}

.section-sm {
  padding: calc(var(--section-spacing) * 0.75) 0;
}

.section-lg {
  padding: calc(var(--section-spacing) * 1.25) 0;
}

.section-hero {
  padding: calc(var(--section-spacing) * 1.5) 0;
  position: relative;
  overflow: hidden;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* Two Column Layouts */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.two-column-reverse {
  grid-template-columns: 1fr 1fr;
}

.two-column-reverse .column:first-child {
  order: 2;
}

.two-column-reverse .column:last-child {
  order: 1;
}

@media (max-width: 768px) {
  .two-column,
  .two-column-reverse {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .two-column-reverse .column:first-child,
  .two-column-reverse .column:last-child {
    order: initial;
  }
}

/* Three Column Layouts */
.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2xl);
}

@media (max-width: 768px) {
  .three-column {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

/* Four Column Layouts */
.four-column {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

@media (max-width: 1024px) {
  .four-column {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .four-column {
    grid-template-columns: 1fr;
  }
}

/* ===================================
   BACKGROUND ELEMENTS
   =================================== */

/* Gradient Orb Background */
.bg-orb {
  position: relative;
}

.bg-orb::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  background: var(--gradient-orb);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
}

.bg-orb-left::before {
  left: 0;
  transform: translate(-30%, -50%);
}

.bg-orb-right::before {
  left: 100%;
  transform: translate(-70%, -50%);
}

/* Grid Pattern Background */
.bg-grid {
  position: relative;
}

.bg-grid::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
  z-index: -1;
}

/* Subtle Background Variations */
.bg-secondary {
  background-color: var(--color-bg-secondary);
}

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

.bg-gradient {
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

/* ===================================
   FOOTER
   =================================== */

.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-primary);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-column h4 {
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-secondary);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
}

.footer-legal a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* ===================================
   RESPONSIVE CONTAINERS
   =================================== */

@media (max-width: 1280px) {
  :root {
    --container-max-width: 1024px;
  }
}

@media (max-width: 1024px) {
  :root {
    --container-max-width: 768px;
    --container-padding: var(--space-md);
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: var(--space-md);
    --section-spacing: var(--space-3xl);
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: var(--space-sm);
    --section-spacing: var(--space-2xl);
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
  }
}