/* Cascade Layers */
@layer base, components, utilities;

@layer base {
  :root {
    /* RSI Showroom (Light) */
    --bg-color: oklch(98% 0.01 240);
    --text-color: oklch(20% 0.05 240);
    --surface-color: oklch(95% 0.02 240 / 85%);
    --primary-color: oklch(70% 0.15 210); /* RSI Cyan (Bright) */
    --secondary-color: oklch(60% 0.1 240); /* Industrial Blue */
    --accent-color: oklch(75% 0.2 60); /* Warning Amber */
    --shadow-color: oklch(0% 0 0 / 10%);
    --grid-opacity: 0.05;
    --border-glow: oklch(70% 0.15 210 / 30%);
    --transition-speed: 0.4s;
    --font-main: 'Rajdhani', sans-serif;
    --font-display: 'Orbitron', sans-serif;
  }

  [data-theme="dark"] {
    /* RSI Flight HUD (Dark) */
    --bg-color: oklch(12% 0.05 240); /* Industrial Charcoal */
    --text-color: oklch(80% 0.15 210); /* RSI Cyan Readout */
    --surface-color: oklch(15% 0.08 240 / 60%); /* Cockpit Glass */
    --primary-color: oklch(75% 0.2 210); /* Neon RSI Cyan */
    --primary-hover: oklch(85% 0.2 210);
    --secondary-color: oklch(40% 0.1 240); /* Deep Industrial Blue */
    --accent-color: oklch(70% 0.2 60); /* High-Vis Amber */
    --shadow-color: oklch(0% 0 0 / 90%);
    --grid-opacity: 0.15;
    --border-glow: oklch(75% 0.2 210 / 50%);
  }

  html {
    color-scheme: light dark;
    background-color: var(--bg-color);
  }

  body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
    transition: background-color var(--transition-speed), color var(--transition-speed);
  }

  /* Star Citizen Background Elements */
  .starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    z-index: -2;
    background: radial-gradient(1px 1px at 20% 30%, white 100%, transparent),
                radial-gradient(1.5px 1.5px at 50% 50%, white 100%, transparent),
                radial-gradient(1px 1px at 80% 70%, white 100%, transparent);
    background-size: 600px 600px;
    opacity: 0.2;
    animation: drift 120s linear infinite;
  }

  .grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: 
      linear-gradient(var(--primary-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--primary-color) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: var(--grid-opacity);
    pointer-events: none;
  }

  @keyframes drift {
    from { transform: translate(0, 0); }
    to { transform: translate(-200px, -200px); }
  }

  header {
    background: linear-gradient(to bottom, var(--surface-color), transparent);
    backdrop-filter: blur(10px) contrast(1.1);
    -webkit-backdrop-filter: blur(10px) contrast(1.1);
    padding: 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-glow);
    z-index: 10;
  }

  .header-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
  }

  .uee-logo {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.5rem;
    padding: 0.2rem 0.8rem;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    letter-spacing: 2px;
  }

  main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
  }

  footer {
    padding: 1rem 3rem;
    background: linear-gradient(to top, var(--surface-color), transparent);
    border-top: 1px solid var(--border-glow);
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--primary-color);
    opacity: 0.8;
  }

  .footer-readout {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .spacer { flex: 1; }

  h1 {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary-color);
    text-transform: uppercase;
  }
}