/* ==========================================================================
   MAIN LAYOUT & BASE STYLES
   ========================================================================== */

@import url('./variables.css');
@import url('./animations.css');
@import url('./components.css');

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--surface);
  color: var(--on-surface);
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  font-family: var(--font-sans);
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Custom Selection */
::selection {
  background-color: var(--secondary);
  color: #ffffff;
}

/* Typography Classes */
.font-serif { font-family: var(--font-serif); }
.font-sans { font-family: var(--font-sans); }
.font-mono { font-family: var(--font-mono); }

.text-editorial-hero {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 7.5vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  font-weight: 700;
}

.text-section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-subheading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--secondary);
}

.text-editorial-lead {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.85rem);
  line-height: 1.45;
  color: var(--on-surface);
}

.text-body-prose {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--on-surface-variant);
}

/* Grid Layout Architecture */
.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .site-container {
    padding: 0 2.5rem;
  }
}

.editorial-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .editorial-grid {
    gap: 2.5rem;
  }
}

.section-spacer {
  margin-bottom: var(--spacing-section);
  position: relative;
}

@media (max-width: 768px) {
  .section-spacer {
    margin-bottom: 2rem;
  }
}

/* Background Engineering Grid Pattern */
.blueprint-grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image: 
    linear-gradient(90deg, var(--grid-line-color) 1px, transparent 1px),
    linear-gradient(var(--grid-line-color) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: center top;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--surface);
}

::-webkit-scrollbar-thumb {
  background: var(--outline-variant);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

/* Mobile Responsive Navigation Overlay */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--outline-light);
  border-radius: 6px;
  padding: 0.4rem;
  color: var(--on-surface);
  cursor: pointer;
}

@media (max-width: 900px) {
  .mobile-nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .desktop-nav-links {
    display: none;
  }
  
  .command-nav-bar {
    grid-template-columns: 1fr auto auto;
  }
}

.mobile-menu-drawer {
  position: fixed;
  top: 76px;
  left: 1.5rem;
  right: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--outline-light);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--glass-shadow);
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 99;
}

.mobile-menu-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}