/* ==========================================================================
   RADLABFORGE / PAYTRACE AI - GLOBAL DESIGN SYSTEM
   Brand Colors:
     Primary: #043F2E (Forest Green)
     Accent: #C8F169 (Vibrant Lime)
     Surface: #EEF2E3 (Pale Sage Surface)
     Background: #FFFFFF (Clean Pure White)
     Text Emphasis: #1863DC (Cobalt Blue Accent)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Color Palette */
  --color-primary: #043F2E;
  --color-primary-dark: #02251A;
  --color-primary-light: #085C43;
  --color-accent: #C8F169;
  --color-accent-hover: #D4F585;
  --color-surface: #EEF2E3;
  --color-surface-soft: #F6F9F0;
  --color-surface-card: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-emphasis: #1863DC;
  
  /* Text & Border Shades */
  --text-primary: #043F2E;
  --text-secondary: rgba(4, 63, 46, 0.72);
  --text-muted: rgba(4, 63, 46, 0.48);
  --text-inverse: #FFFFFF;
  --text-inverse-muted: rgba(255, 255, 255, 0.7);
  
  --border-subtle: rgba(4, 63, 46, 0.10);
  --border-strong: rgba(4, 63, 46, 0.22);
  --border-accent: rgba(200, 241, 105, 0.4);
  --border-inverse: rgba(255, 255, 255, 0.15);

  /* Status Colors */
  --status-success: #1E8E3E;
  --status-warning: #D97706;
  --status-danger: #DC2626;
  --status-info: #1863DC;

  /* Typography Scale */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --text-hero: clamp(2.5rem, 5.5vw, 5.5rem);
  --text-h1: clamp(2.2rem, 4vw, 3.8rem);
  --text-h2: clamp(1.8rem, 3vw, 2.75rem);
  --text-h3: clamp(1.4rem, 2vw, 2rem);
  --text-h4: clamp(1.15rem, 1.4vw, 1.35rem);
  --text-body: 1.05rem;
  --text-body-sm: 0.925rem;
  --text-caption: 0.8rem;
  --text-mono: 0.85rem;

  /* Spacing */
  --space-unit: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  --space-10: 64px;
  --space-12: 80px;
  --space-16: 112px;
  --space-20: 144px;

  /* Layout */
  --container-max: 1360px;
  --container-wide: 1540px;
  --container-narrow: 980px;
  --nav-height: 64px;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Shadows (minimal, border-led system) */
  --shadow-subtle: 0 1px 3px rgba(4, 63, 46, 0.04);
  --shadow-elevated: 0 8px 24px rgba(4, 63, 46, 0.08);
  --shadow-overlay: 0 24px 48px rgba(2, 37, 26, 0.28);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

code, pre, kbd {
  font-family: var(--font-mono);
}

/* ==========================================================================
   Typography Utilities
   ========================================================================== */

.hero-title {
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-primary);
  text-transform: uppercase;
}

.section-title {
  font-size: var(--text-h2);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-primary);
}

.subsection-title {
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.section-tag::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border: 1px solid var(--color-primary);
}

.lead-text {
  font-size: clamp(1.15rem, 1.5vw, 1.35rem);
  line-height: 1.55;
  color: var(--text-secondary);
}

.mono-meta {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.04em;
}

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

.text-emphasis {
  color: var(--color-emphasis);
}

.text-muted {
  color: var(--text-muted);
}

/* ==========================================================================
   Layout Containers & Grid
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.page-section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  position: relative;
  border-bottom: 1px solid var(--border-subtle);
}

.section-surface {
  background-color: var(--color-surface);
}

.section-surface-soft {
  background-color: var(--color-surface-soft);
}

.section-dark {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.section-dark .section-title,
.section-dark .hero-title,
.section-dark .subsection-title {
  color: var(--text-inverse);
}

.section-dark .lead-text {
  color: var(--text-inverse-muted);
}

.section-dark .section-tag {
  color: var(--color-accent);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-accent);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: #FFFFFF;
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  transform: translateY(-1px);
}

.btn-secondary-inverse {
  background-color: transparent;
  color: var(--text-inverse);
  border: 1px solid var(--border-inverse);
}

.btn-secondary-inverse:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.825rem;
}

.btn-lg {
  padding: 18px 36px;
  font-size: 1.05rem;
}

.btn-icon {
  width: 14px;
  height: 14px;
}

/* ==========================================================================
   Simulated Tag & System Badges
   ========================================================================== */

.simulated-badge {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: rgba(4, 63, 46, 0.08);
  color: var(--color-primary);
  padding: 3px 8px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.section-dark .simulated-badge {
  background-color: rgba(200, 241, 105, 0.15);
  color: var(--color-accent);
  border-color: rgba(200, 241, 105, 0.3);
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  display: inline-block;
  box-shadow: 0 0 8px var(--color-accent);
  animation: pulse-dot 2.5s infinite;
}

.status-dot-red {
  background-color: var(--status-danger);
  box-shadow: 0 0 8px var(--status-danger);
}

.status-dot-amber {
  background-color: var(--status-warning);
  box-shadow: 0 0 8px var(--status-warning);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   Utility Classes & Borders
   ========================================================================== */

.border-box {
  border: 1px solid var(--border-subtle);
  background-color: var(--color-bg);
}

.border-t { border-top: 1px solid var(--border-subtle); }
.border-b { border-bottom: 1px solid var(--border-subtle); }
.border-l { border-left: 1px solid var(--border-subtle); }
.border-r { border-right: 1px solid var(--border-subtle); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }

.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Animation Utility */
.fade-in-up {
  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);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}