/* ==========================================================================
   ALTUS — DESIGN SYSTEM & BASE STYLES
   Cinematic, Architectural, Deep Black & Glassmorphism
   ========================================================================== */

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

:root {
  /* Color Palette */
  --bg-black: #050507;
  --bg-surface: #0a0b0f;
  --bg-surface-elevated: #11131a;
  
  --text-primary: #f5f6fa;
  --text-secondary: #9ba1b0;
  --text-tertiary: #5f6575;
  --text-accent: #ffffff;
  
  /* Telemetry / Status Accents */
  --accent-cyan: #00e5ff;
  --accent-emerald: #00f090;
  --accent-glow: rgba(0, 229, 255, 0.15);
  
  /* Glassmorphism System */
  --glass-bg: rgba(14, 16, 22, 0.55);
  --glass-bg-subtle: rgba(255, 255, 255, 0.02);
  --glass-bg-hover: rgba(22, 25, 34, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-highlight: rgba(255, 255, 255, 0.18);
  --glass-blur: blur(20px);
  --glass-blur-subtle: blur(10px);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.06);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* Spacings & Grid */
  --max-width: 1440px;
  --container-padding: clamp(1.5rem, 5vw, 4.5rem);
  --section-spacing: clamp(6rem, 12vw, 14rem);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-medium: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-cinematic: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  background-color: var(--bg-black);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: hidden;
  selection-background-color: #ffffff;
  selection-color: #000000;
}

::selection {
  background: var(--text-primary);
  color: var(--bg-black);
}

body {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-black);
  overflow-x: hidden;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: var(--bg-black);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Base Typographic Hierarchies */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

p {
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.7;
}

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

button, input, textarea {
  font-family: inherit;
  color: inherit;
  outline: none;
  border: none;
  background: none;
}

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

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.mono-tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}