/* ==========================================================================
   NYXOS — OFFICIAL PURPLE NEBULA DESIGN SYSTEM (2026)
   Aesthetic: Low-Level Bare-Metal Unix + Nightfall Purple Volumetric Atmosphere
   ========================================================================== */

/* Self-hosted fonts (latin subset, woff2) — OFL, see fonts/LICENSES.txt.
   Replaces the Google Fonts @import: zero third-party requests + strict CSP. */
@font-face{font-family:'Outfit';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/outfit-400.woff2') format('woff2');}
@font-face{font-family:'Outfit';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/outfit-500.woff2') format('woff2');}
@font-face{font-family:'Outfit';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/outfit-600.woff2') format('woff2');}
@font-face{font-family:'Outfit';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/outfit-700.woff2') format('woff2');}
@font-face{font-family:'Outfit';font-style:normal;font-weight:800;font-display:swap;src:url('../fonts/outfit-800.woff2') format('woff2');}
@font-face{font-family:'Outfit';font-style:normal;font-weight:900;font-display:swap;src:url('../fonts/outfit-900.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/space-grotesk-400.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/space-grotesk-500.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/space-grotesk-600.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/space-grotesk-700.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:300;font-display:swap;src:url('../fonts/jetbrains-mono-300.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;src:url('../fonts/jetbrains-mono-400.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;src:url('../fonts/jetbrains-mono-500.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:600;font-display:swap;src:url('../fonts/jetbrains-mono-600.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:700;font-display:swap;src:url('../fonts/jetbrains-mono-700.woff2') format('woff2');}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:800;font-display:swap;src:url('../fonts/jetbrains-mono-800.woff2') format('woff2');}

:root {
  /* Obsidian & Cosmic Void */
  --bg-void: #030305;
  --bg-primary: #06070a;
  --bg-secondary: #0a0c12;
  --bg-surface: #0f121a;
  --bg-elevated: #151924;
  --bg-card: rgba(15, 18, 26, 0.82);
  --bg-card-hover: rgba(22, 27, 39, 0.95);

  /* Typography Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-faint: #334155;
  --text-metal: #cbd5e1;

  /* Nightfall Purple & Nebula Palette */
  --accent-purple: #a855f7;
  --accent-purple-bright: #c084fc;
  --accent-purple-light: #e879f9;
  --accent-purple-deep: #7c3aed;
  --accent-purple-glow: rgba(168, 85, 247, 0.3);
  --accent-purple-faint: rgba(168, 85, 247, 0.08);
  --accent-purple-border: rgba(168, 85, 247, 0.4);

  /* Precise Hairline Borders */
  --border-hairline: rgba(255, 255, 255, 0.07);
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-medium: rgba(255, 255, 255, 0.2);
  --border-strong: rgba(255, 255, 255, 0.35);

  /* Elevation & Shadows */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 10px 30px -4px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 24px 60px -8px rgba(0, 0, 0, 0.95);
  --shadow-glow: 0 0 50px rgba(168, 85, 247, 0.2);

  /* Typography Families */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-hero: 'Outfit', 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Compact Scaled Spacing */
  --container-max: 1320px;
  --container-wide: 1440px;

  /* Easing */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 140ms var(--ease-out);
  --transition-base: 260ms var(--ease-out);
}

/* ==========================================================================
   Base Reset & HTML Structure
   ========================================================================== */

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

html {
  font-size: 15px; /* Tuned base size so everything fits properly */
  scroll-behavior: smooth;
  color-scheme: dark;
  background-color: var(--bg-void);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-void);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -9999px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  color: var(--accent-purple-bright);
  padding: 0.75rem 1.5rem;
  z-index: 10000;
  border: 1px solid var(--accent-purple);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  border-radius: 4px;
}
.skip-link:focus {
  top: 1rem;
}

/* Ambient Grid & Purple Nebula Aura */
.ambient-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at 50% 25%, rgba(0,0,0,1) 20%, rgba(0,0,0,0) 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 25%, rgba(0,0,0,1) 20%, rgba(0,0,0,0) 80%);
}

.ambient-aurora {
  position: fixed;
  top: -15vh;
  left: 50%;
  transform: translateX(-50%);
  width: 90vw;
  height: 60vh;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, rgba(124, 58, 237, 0.08) 40%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 1;
  opacity: 0.9;
}

#webgl-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

#webgl-canvas-container canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-void);
}
::-webkit-scrollbar-thumb {
  background: #1e172e;
  border-radius: 3px;
  border: 1px solid var(--border-hairline);
}
::-webkit-scrollbar-thumb:hover {
  background: #3b2064;
}

/* Selection */
::selection {
  background: rgba(168, 85, 247, 0.4);
  color: #fff;
}

/* ==========================================================================
   Typography Hierarchy & System
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(3.2rem, 7vw, 6.2rem);
  font-weight: 850;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2.2rem, 4.2vw, 3.6rem);
  font-weight: 750;
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-purple-bright);
  margin-bottom: 1rem;
}

.kicker::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-purple);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-purple-bright);
}

.lead {
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 48ch;
}

/* ==========================================================================
   Structural Layout Containers
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 3.5vw, 2.5rem);
  padding-right: clamp(1.25rem, 3.5vw, 2.5rem);
  position: relative;
  z-index: 2;
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 3.5vw, 3rem);
  padding-right: clamp(1.25rem, 3.5vw, 3rem);
  position: relative;
  z-index: 2;
}

/* Balanced Section Spacing */
.scene-section {
  padding-top: clamp(5rem, 10vh, 8.5rem);
  padding-bottom: clamp(5rem, 10vh, 8.5rem);
  position: relative;
  z-index: 2;
  border-bottom: 1px solid var(--border-hairline);
}

.scene-section:last-of-type {
  border-bottom: none;
}

.scene-header {
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.scene-header.center {
  text-align: center;
}
.scene-header.center .lead {
  margin-left: auto;
  margin-right: auto;
}

.scene-header.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 900px) {
  .scene-header.split {
    grid-template-columns: 1.2fr 1fr;
    align-items: flex-end;
    justify-content: space-between;
  }
}

/* ==========================================================================
   Buttons & Micro-interactions
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.65rem;
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), color var(--transition-base);
  user-select: none;
  outline: none;
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-purple-bright);
  outline-offset: 2px;
}

.btn-primary {
  background: #ffffff;
  color: #000;
  border: 1px solid #ffffff;
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  background: #ffffff;
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.22);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-purple-border);
  color: #fff;
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--accent-purple);
  color: #ffffff;
  border: 1px solid var(--accent-purple-bright);
  box-shadow: 0 4px 20px rgba(168, 85, 247, 0.35);
}

.btn-accent:hover {
  background: var(--accent-purple-bright);
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(168, 85, 247, 0.55);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 0.875rem;
}

.btn-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
}

.badge-purple {
  background: var(--accent-purple-faint);
  border-color: var(--accent-purple-border);
  color: var(--accent-purple-bright);
}

.badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-purple-bright);
  box-shadow: 0 0 8px var(--accent-purple);
}

/* Reveal Animations */
.reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-item.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 80ms; }
.delay-2 { transition-delay: 160ms; }
.delay-3 { transition-delay: 240ms; }
.delay-4 { transition-delay: 320ms; }