/*
  Operator Agents – Style Guide
  Matrix-inspired, industrial, terminal-like. Dark-first. Restrained green accents.
  Not cyberpunk. Not neon. Controlled authority.
*/

/* Design Tokens */
:root {
  /* Color System - Dark-First Theme */
  --bg-primary:    #0D0F0E;  /* Deep near-black with green undertone */
  --bg-secondary:  #111413;  /* Alternative sections */
  --bg-tertiary:   #0F1312;  /* Cards, elevated surfaces */
  --bg-code:       #111715;  /* Code blocks */

  /* Text */
  --text-primary:   #E6EDEB;  /* Soft off-white */
  --text-secondary: #A4B0AA;  /* Secondary/muted text */
  --text-code:      #BCC9C3;  /* Code text */

  /* Matrix Green Accent (Restrained) */
  --accent-green:       #00C26E;  /* Primary accent */
  --accent-green-hover: #00E07F;  /* Hover/highlight */
  --accent-green-glow:  rgba(0, 194, 110, 0.15);  /* Subtle glow (rare use) */

  /* Industrial Borders */
  --border-subtle:   #1C2220;
  --border-emphasis: #1F2623;

  /* Typography Scale (8px base) */
  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg:   1.125rem;  /* 18px */
  --text-xl:   1.5rem;    /* 24px */
  --text-2xl:  2rem;      /* 32px */

  /* Font Stacks */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;

  /* Spacing Scale (8px base) */
  --space-1:  0.25rem;  /* 4px */
  --space-2:  0.5rem;   /* 8px */
  --space-3:  0.75rem;  /* 12px */
  --space-4:  1rem;     /* 16px */
  --space-6:  1.5rem;   /* 24px */
  --space-8:  2rem;     /* 32px */
  --space-12: 3rem;     /* 48px */
  --space-16: 5rem;     /* 80px - major section breaks */

/* Base Reset & Typography */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  color: var(--text-primary);
  background: var(--bg-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings - Technical Weight */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.3;
  margin-top: 0;
}

/* Focus Visibility (Accessibility) */
:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}

/* Layout */
.wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

/* Header & Footer - Minimal Industrial */
.site-header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-4) 0;
}
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-6) 0;
  margin-top: var(--space-16);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}
.brand {
  font-weight: 500;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}
.nav a {
  margin-left: var(--space-4);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
  font-size: var(--text-sm);
}
.nav a:hover,
.nav a:focus-visible {
  color: var(--accent-green);
}

/* Hero - Restrained */
.hero {
  padding: var(--space-16) 0 var(--space-12) 0;
}
.hero h1 {
  font-size: var(--text-2xl);
  margin: var(--space-2) 0;
  line-height: 1.2;
  font-weight: 500;
}
.lede {
  color: var(--text-secondary);
  max-width: 60ch;
  line-height: 1.8;
  font-size: var(--text-lg);
}

/* Buttons - Minimal, No Gloss */
.button,
.btn-secondary {
  display: inline-block;
  background: var(--accent-green);
  color: var(--bg-primary);
  text-decoration: none;
  padding: 12px 18px;
  border-radius: 4px;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background 0.15s ease;
  border: none;
}
.button:hover,
.button:focus-visible {
  background: var(--accent-green-hover);
}
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-emphasis);
  color: var(--text-secondary);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* Checkout */
.checkout-price {
  font-size: var(--text-xl);
  color: var(--accent-green);
  margin: 0 0 var(--space-8) 0;
}
.upsell-container {
  margin: var(--space-6) 0;
}
.checkout-actions {
  margin-top: var(--space-6);
}
.checkout-notice {
  margin-top: var(--space-2);
}

/* Upsell Add-on Card */
.addon-label { display: block; cursor: pointer; }
.addon-checkbox {
  position: absolute;
  opacity: 0;
}
.addon-card {
  border: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
  padding: var(--space-6);
  border-radius: 4px;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.addon-card.selected {
  border-color: var(--accent-green);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--accent-green-glow);
}
.addon-checkbox:focus-visible + .addon-card {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}
.addon-card:active {
  border-color: var(--accent-green);
}
.addon-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.addon-header h4 {
  margin: 0;
}
.addon-desc {
  margin: var(--space-2) 0 0 0;
  color: var(--text-secondary);
}
.addon-savings {
  margin: var(--space-2) 0 0 0;
}
.addon-price-badge { font-family: var(--font-mono); color: var(--accent-green); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-emphasis);
  color: var(--text-secondary);
}
.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* Sections - Breathing Room */
.products {
  padding: var(--space-12) 0;
}
.products h2 {
  margin-top: 0;
  margin-bottom: var(--space-6);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--accent-green);
}

/* Product Grid & Cards - Industrial */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
  margin: var(--space-8) 0;
}
.product-card {
  border: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
  padding: var(--space-6);
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease;
}
.product-card:hover,
.product-card:focus-within {
  border-color: var(--border-emphasis);
}
.product-title {
  margin: 0 0 var(--space-3) 0;
  font-size: var(--text-lg);
  font-weight: 500;
}
.product-desc {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  flex-grow: 1;
  line-height: 1.6;
}
.product-price {
  font-weight: 500;
  margin: var(--space-4) 0 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--accent-green);
}
.muted {
  color: var(--text-secondary);
}

/* Product Detail */
.back-link {
  display: inline-block;
  margin-bottom: var(--space-6);
  color: var(--accent-green);
  text-decoration: none;
  font-size: var(--text-sm);
  font-family: var(--font-mono);
}
.back-link:hover,
.back-link:focus-visible {
  text-decoration: underline;
}

.product-detail {
  padding: var(--space-8) 0;
}
.product-detail h1 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-weight: 500;
}
.product-hook {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin: 0 0 var(--space-6) 0;
  line-height: 1.6;
}
.product-top-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0 0 var(--space-8) 0;
}
.product-top-cta .price {
  font-size: var(--text-xl);
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--accent-green);
}
.product-meta {
  margin: 0 0 var(--space-8) 0;
}
.product-meta .price {
  font-size: var(--text-xl);
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--accent-green);
}

.product-body {
  margin: var(--space-8) 0;
}
.product-body h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--accent-green);
  border-left: 2px solid var(--accent-green);
  padding-left: var(--space-3);
}
.product-body ul {
  padding-left: var(--space-6);
  list-style: none;
}
.product-body li {
  margin-bottom: var(--space-2);
  position: relative;
}
.product-body li::before {
  content: "›";
  position: absolute;
  left: -1.25rem;
  color: var(--accent-green);
  font-family: var(--font-mono);
}

/* Product Content - Full Description */
.product-content {
  margin: var(--space-12) 0;
  line-height: 1.8;
  color: var(--text-primary);
}
.product-content p {
  margin: 0 0 var(--space-6) 0;
}
.product-content p:last-child {
  margin-bottom: 0;
}
.product-content strong {
  color: var(--accent-green);
  font-weight: 600;
}

/* CLI-Style Dividers */
hr {
  border: none;
  border-top: 1px solid var(--border-subtle);
  margin: var(--space-12) 0;
}

/* Code/Mono Elements */
code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}
code {
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--border-subtle);
  color: var(--text-code);
}

/* Utility */
.mono { font-family: var(--font-mono); }

/* Accessibility - Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}