/* ===================================================================
   COSMICUBATOR — Pure SpaceX Monochromatic Brutalist Design System
   Palette: Absolute Obsidian Black (#000000) & Stark Titanium White (#FFFFFF)
   Layout: Full-Page Immersive Viewport Sections + Zero-Overhead GPU Animations
   =================================================================== */

:root {
  --bg-deep: #000000;            /* SpaceX Pure Pitch Black */
  --bg-surface: #080808;         /* Subtle Carbon Black */
  --bg-card: #0F0F0F;            /* Industrial Panel Black */
  --border-muted: #1F1F1F;       /* 1px Razor Grid Wireframe */
  --border-active: #383838;      /* Active Element Border */
  --border-bright: #FFFFFF;      /* Stark White Border */
  --text-primary: #FFFFFF;       /* 100% Stark Titanium White */
  --text-secondary: #E4E4E7;     /* Zinc 200: High-contrast legible body */
  --text-muted: #A1A1AA;         /* Zinc 400: Crisp engineering metadata */
  --text-dim: #71717A;           /* Zinc 500: Fine labels */
  --accent-white: #FFFFFF;
  --accent-glow: rgba(255, 255, 255, 0.15);
  --font-display: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-deep);
  color: var(--text-secondary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background-color: #000000;
}

/* Precision Aerospace Wireframe Background */
.spacex-grid-bg {
  background-size: 80px 80px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
}

/* SpaceX Deep Space Ambient Vignette */
.spacex-vignette {
  background: radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
}

/* Typography Utilities */
.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

/* ==================== SIGNATURE SPACEX BUTTONS WITH SHIMMER ==================== */
.btn-spacex-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #000000;
  background-color: #FFFFFF;
  border: 2px solid #FFFFFF;
  border-radius: 0px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-spacex-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -150%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-spacex-primary:hover {
  background-color: transparent;
  color: #FFFFFF;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.btn-spacex-primary:hover::after {
  left: 150%;
}

.btn-spacex-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 36px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #FFFFFF;
  background-color: transparent;
  border: 2px solid rgba(255, 255, 255, 0.85);
  border-radius: 0px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-spacex-outline::after {
  content: '';
  position: absolute;
  top: 0;
  left: -150%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-spacex-outline:hover {
  background-color: #FFFFFF;
  color: #000000;
  border-color: #FFFFFF;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.btn-spacex-outline:hover::after {
  left: 150%;
}

/* Telemetry Status Indicator (SpaceX Beacon) */
.status-pip {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #FFFFFF;
  box-shadow: 0 0 10px #FFFFFF;
  display: inline-block;
  animation: pulse-glow 2.2s infinite ease-in-out;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.85); }
}

/* SpaceX Data & Manifest Rows */
.manifest-row {
  border-bottom: 1px solid var(--border-muted);
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.manifest-row:hover {
  background-color: rgba(255, 255, 255, 0.04);
  border-color: var(--border-active);
  transform: translateX(4px);
}

/* SpaceX Navigation Link Underline Effect & ScrollSpy */
.spacex-nav-link {
  position: relative;
  padding-bottom: 4px;
  transition: color 0.2s ease;
}

.spacex-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 1px;
  background-color: #FFFFFF;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.spacex-nav-link:hover::after,
.spacex-nav-link.active::after {
  width: 100%;
}

.spacex-nav-link.active {
  color: #FFFFFF !important;
}

/* ==================== HIGH-PERFORMANCE GPU SCROLL ANIMATIONS ==================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  will-change: opacity, transform;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger Delays for Grid Children */
.stagger-1 { transition-delay: 100ms; }
.stagger-2 { transition-delay: 200ms; }
.stagger-3 { transition-delay: 300ms; }
.stagger-4 { transition-delay: 400ms; }

/* Subsystem Content Smooth Fade Transition */
.sub-content-fade {
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.sub-content-fade.fading {
  opacity: 0;
  transform: translateY(8px);
}

/* Subtle Aerospace Scanline */
.aerospace-scanline {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: scanline-pass 8s ease-in-out infinite;
  pointer-events: none;
}

@keyframes scanline-pass {
  0% { transform: translateY(0); opacity: 0; }
  15% { opacity: 0.6; }
  85% { opacity: 0.6; }
  100% { transform: translateY(100vh); opacity: 0; }
}

/* Interactive Aerospace Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.94);
  backdrop-filter: blur(16px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-active);
  border-radius: 0px;
  width: 100%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.98), 0 0 40px rgba(255, 255, 255, 0.05);
  transform: translateY(20px) scale(0.98);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal-container {
  transform: translateY(0) scale(1);
}

/* Custom SpaceX Monochromatic Scrollbar */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--border-active); border-radius: 0px; }
::-webkit-scrollbar-thumb:hover { background: #FFFFFF; }