/* ═══════════════════════════════════════════════════════════════════
   QUANTA MATERIA DESIGN SYSTEM
   Brutalism + Futurism + Art Deco + Terminal Aesthetics
   ═══════════════════════════════════════════════════════════════════ */

/* ──────────────────────────────────────────────────────────────────
   I. CSS CUSTOM PROPERTIES
   ────────────────────────────────────────────────────────────────── */
:root {
  /* Color System - Terminal Screen (Dark Theme) */
  --color-bg: #0D0D0D;
  --color-text-primary: #E8E6E0;
  --color-text-secondary: #8C8A84;
  --color-border: #404038;
  --color-border-light: #2A2A24;
  --color-accent: #8B6F47;
  --color-accent-active: #C85A34;
  --color-steel: #5A7080;
  
  /* Spacing System - 8px base */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-xxl: 64px;
  
  /* Typography Scale - Perfect Fourth (1.333) */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-md: 18px;
  --font-size-lg: 24px;
  --font-size-xl: 36px;
  --font-size-xxl: 48px;
  
  /* Grid System */
  --grid-columns: 12;
  --grid-gutter: 24px;
  --grid-margin: 32px;
  
  /* Structural Constants */
  --border-width: 2px;
  --border-width-thick: 4px;
  --shadow-offset: 8px;
  --header-height: 96px;
  
  /* Animation */
  --transition-speed: 100ms;
  --transition-easing: linear;
}

/* ASCII Font for special elements */
@font-face {
  font-family: 'ASCII';
  src: local('Courier New'), local('Courier'), local('monospace');
  font-weight: normal;
  font-style: normal;
}

.ascii-text {
  font-family: 'Courier New', 'Courier', monospace;
  font-size: 14px;
  line-height: 1.2;
  letter-spacing: 0.1em;
  white-space: pre;
  font-weight: 400;
}

/* ──────────────────────────────────────────────────────────────────
   II. RESET & BASE STYLES
   ────────────────────────────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* ──────────────────────────────────────────────────────────────────
   III. TYPOGRAPHY SYSTEM
   ────────────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-size-xxl);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.1;
}

h2 {
  font-size: var(--font-size-xl);
  letter-spacing: 0.01em;
  line-height: 1.2;
}

h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  line-height: 1.3;
}

p {
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

/* Monospace for data/code */
code, pre, .mono {
  font-family: "Courier New", Courier, monospace;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Small caps for labels */
.label, .meta {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* ──────────────────────────────────────────────────────────────────
   IV. GRID SYSTEM - VISIBLE ARCHITECTURAL STRUCTURE
   ────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--grid-margin);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: var(--grid-gutter);
  position: relative;
}

/* Grid visualization - structural emphasis */
.grid--visible::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: repeating-linear-gradient(
    90deg,
    transparent,
    transparent calc((100% - (var(--grid-gutter) * 11)) / 12),
    var(--color-border-light) calc((100% - (var(--grid-gutter) * 11)) / 12),
    var(--color-border-light) calc((100% - (var(--grid-gutter) * 11)) / 12 + 1px)
  );
  pointer-events: none;
  opacity: 0.3;
  z-index: 0;
}

/* Column spans */
.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* ──────────────────────────────────────────────────────────────────
   V. STRUCTURAL COMPONENTS
   ────────────────────────────────────────────────────────────────── */

/* Header - Monumental and Fixed */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg);
  border-bottom: var(--border-width-thick) solid var(--color-border);
  box-shadow: 0 var(--shadow-offset) 0 0 rgba(0, 0, 0, 0.15);
  z-index: 1000;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center;
  padding: 0 var(--grid-margin);
}

.site-header__logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
}

.site-header__nav {
  justify-self: center;
  display: flex;
  gap: var(--space-lg);
}

.site-header__actions {
  justify-self: end;
}

/* Navigation - Structural and Clear */
.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-primary);
  padding: var(--space-xs) var(--space-sm);
  border: var(--border-width) solid transparent;
  display: inline-block;
  transition: all var(--transition-speed) var(--transition-easing);
  position: relative;
}

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

.nav-link::after {
  content: '→';
  opacity: 0;
  margin-left: var(--space-xs);
  transition: opacity var(--transition-speed) var(--transition-easing);
}

.nav-link:hover::after {
  opacity: 1;
}

/* Main Content Area */
.main-content {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* Footer - Load-Bearing Structure */
.site-footer {
  border-top: var(--border-width-thick) solid var(--color-border);
  padding: var(--space-xl) var(--grid-margin);
  margin-top: var(--space-xxl);
  background-color: var(--color-bg);
  position: relative;
}

.site-footer::before {
  content: '▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼';
  position: absolute;
  top: calc(var(--border-width-thick) * -1 - 12px);
  left: 0;
  right: 0;
  text-align: center;
  font-size: 8px;
  color: var(--color-border);
  letter-spacing: 2px;
}

/* ──────────────────────────────────────────────────────────────────
   VI. GEOMETRIC COMPONENTS
   ────────────────────────────────────────────────────────────────── */

/* Cards - Concrete Slabs */
.card {
  background-color: var(--color-bg);
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-lg);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 0 rgba(0, 0, 0, 0.15);
  position: relative;
}

.card--elevated {
  box-shadow: 
    1px 1px 0 0 rgba(0, 0, 0, 0.2),
    4px 4px 0 0 rgba(0, 0, 0, 0.15),
    12px 12px 0 0 rgba(0, 0, 0, 0.1);
}

.card__header {
  border-bottom: var(--border-width) solid var(--color-border);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-md);
}

/* Buttons - Physical Mechanisms */
.btn {
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  display: inline-block;
  box-shadow: 4px 4px 0 0 rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-speed) var(--transition-easing),
              box-shadow var(--transition-speed) var(--transition-easing);
  position: relative;
}

.btn:hover {
  transform: translate(1px, 1px);
  box-shadow: 3px 3px 0 0 rgba(0, 0, 0, 0.15);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 0 rgba(0, 0, 0, 0.15);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-active);
  border-color: var(--color-accent-active);
}

.btn--danger {
  background-color: var(--color-accent-active);
  color: var(--color-bg);
  border-color: var(--color-accent-active);
}

/* Forms - Physical Input Mechanisms */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.form-label--required::after {
  content: ' [REQUIRED]';
  color: var(--color-accent-active);
}

.form-input,
.form-textarea {
  font-family: inherit;
  font-size: var(--font-size-base);
  width: 100%;
  padding: var(--space-sm);
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  border: var(--border-width-thick) solid var(--color-border);
  outline: none;
  transition: border-color var(--transition-speed) var(--transition-easing);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.5;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
  font-family: "Courier New", Courier, monospace;
}

/* ──────────────────────────────────────────────────────────────────
   VII. TERMINAL AESTHETICS
   ────────────────────────────────────────────────────────────────── */
.terminal {
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  border: var(--border-width) solid var(--color-text-primary);
  padding: var(--space-md);
  font-family: "Courier New", Courier, monospace;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.terminal__header {
  border-bottom: 1px solid var(--color-bg);
  padding-bottom: var(--space-xs);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-xs);
  opacity: 0.7;
}

.terminal__prompt {
  color: var(--color-accent);
}

.terminal__output {
  margin-left: var(--space-sm);
}

/* Box Drawing Characters */
.box-border {
  border: var(--border-width) solid var(--color-border);
  padding: var(--space-md);
  position: relative;
}

.box-border::before {
  content: '┌';
  position: absolute;
  top: -2px;
  left: -2px;
  font-family: monospace;
}

.box-border::after {
  content: '┘';
  position: absolute;
  bottom: -2px;
  right: -2px;
  font-family: monospace;
}

/* ──────────────────────────────────────────────────────────────────
   VIII. DATA TABLES
   ────────────────────────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  border: var(--border-width) solid var(--color-border);
}

.data-table th {
  background-color: var(--color-text-primary);
  color: var(--color-bg);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-align: left;
  padding: var(--space-sm);
  border: var(--border-width) solid var(--color-border);
}

.data-table td {
  padding: var(--space-sm);
  border: 1px solid var(--color-border-light);
}

.data-table tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.02);
}

.data-table td.numeric {
  font-family: "Courier New", Courier, monospace;
  text-align: right;
}

/* ──────────────────────────────────────────────────────────────────
   IX. HERO SECTIONS & LANDING ZONES
   ────────────────────────────────────────────────────────────────── */
.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: var(--border-width-thick) solid var(--color-border);
  position: relative;
  padding: var(--space-xxl) var(--grid-margin);
}

.hero__content {
  max-width: 960px;
  text-align: center;
}

.hero__title {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: var(--font-size-md);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.hero__description {
  font-size: var(--font-size-base);
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto var(--space-xl);
}

/* ──────────────────────────────────────────────────────────────────
   X. SECTION DIVIDERS - ART DECO GEOMETRY
   ────────────────────────────────────────────────────────────────── */
.section {
  padding: var(--space-xxl) 0;
}

.section--bordered {
  border-top: var(--border-width-thick) solid var(--color-border);
}

.section__header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: var(--border-width) solid var(--color-border);
  position: relative;
}

.section__header::after {
  content: '▼▼▼';
  position: absolute;
  bottom: -8px;
  left: 0;
  font-size: 8px;
  color: var(--color-border);
  letter-spacing: 2px;
}

.section__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ──────────────────────────────────────────────────────────────────
   XI. UTILITY CLASSES
   ────────────────────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-mono { font-family: "Courier New", Courier, monospace; }
.text-caps { text-transform: uppercase; letter-spacing: 0.05em; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.border-top { border-top: var(--border-width) solid var(--color-border); }
.border-bottom { border-bottom: var(--border-width) solid var(--color-border); }

/* ──────────────────────────────────────────────────────────────────
   XII. RESPONSIVE BREAKPOINTS
   ────────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  :root {
    --grid-margin: 24px;
    --header-height: 80px;
  }
  
  .hero__title {
    font-size: 48px;
  }
  
  .site-header {
    grid-template-columns: 1fr auto;
  }
  
  .site-header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: var(--border-width) solid var(--color-border);
    flex-direction: column;
    gap: 0;
    display: none;
  }
  
  .site-header__nav.active {
    display: flex;
  }
  
  .nav-link {
    border-top: var(--border-width) solid var(--color-border);
    padding: var(--space-md);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-xxl: 36px;
    --font-size-xl: 24px;
    --grid-margin: 16px;
  }
  
  .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
  .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
    grid-column: span 12;
  }
  
  .hero__title {
    font-size: 32px;
  }
}