/* ==========================================================================
   Spine Tactical - Main Stylesheet & Design System Extensions
   ========================================================================== */

/* Design Tokens & CSS Variables */
:root {
  --color-background: #131313;
  --color-surface: #131313;
  --color-surface-lowest: #0e0e0e;
  --color-surface-low: #1c1b1b;
  --color-surface-container: #201f1f;
  --color-surface-high: #2a2a2a;
  --color-surface-highest: #353534;
  --color-primary: #c2cba1;
  --color-on-primary: #2c3316;
  --color-primary-container: #4b5332;
  --color-on-primary-container: #bdc69d;
  --color-secondary: #d4c69a;
  --color-tertiary: #ffb783;
  --color-on-surface: #e5e2e1;
  --color-on-surface-variant: #c7c7bb;
  --color-outline: #919286;
  --color-outline-variant: #46483e;
  --color-error: #ffb4ab;
  --header-height: 80px;
}

/* Base Styles & Typography */
html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--color-background);
  color: var(--color-on-surface);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings */
h1, h2, h3, h4, .font-headline {
  font-family: 'Barlow Condensed', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.font-mono-tech {
  font-family: 'JetBrains Mono', monospace;
}

/* Sticky Header Scroll Offset */
section, [id] {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

/* Technical Grid Pattern */
.technical-grid {
  background-image: radial-gradient(circle, #333333 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Tactical Webbing Background Pattern */
.webbing-pattern {
  background-image: repeating-linear-gradient(45deg, #1A1A1A 0, #1A1A1A 2px, transparent 0, transparent 50%);
  background-size: 10px 10px;
  opacity: 0.15;
}

/* Technical Leader Lines */
.leader-line {
  position: absolute;
  height: 1px;
  background-color: var(--color-primary);
  transform-origin: left;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-surface-lowest);
}
::-webkit-scrollbar-thumb {
  background: var(--color-outline-variant);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* Focus Ring for Keyboard Accessibility (WCAG compliant) */
:focus-visible {
  outline: 2px solid var(--color-primary) !important;
  outline-offset: 3px !important;
}

/* Micro-animations & Scroll Reveal States */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .animate-pulse {
    animation: none !important;
  }
}

/* Details/Accordion custom styling */
details summary::-webkit-details-marker {
  display: none;
}

details summary {
  list-style: none;
}

/* Mobile Drawer Transitions */
#mobile-menu-drawer {
  transition: opacity 0.25s ease-in-out, visibility 0.25s ease-in-out;
}

#mobile-menu-drawer.hidden {
  display: none;
  opacity: 0;
  pointer-events: none;
}

/* Color Variant Swatch Selector Active State */
.color-swatch-btn[aria-checked="true"] {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary);
}

/* Cookie Banner Styling */
#cookie-banner {
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

#cookie-banner.hidden {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}