/* ============================================================
   Sasha Inventory — Glassmorphism Design System (glass.css)
   Dark glass UI, mobile-first. No build tools, pure CSS.
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* Colors */
  --primary: #7C3AED;
  --primary-strong: #6D28D9;
  --secondary: #A78BFA;
  --accent: #F97316;
  --success: #22C55E;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: #38BDF8;

  /* Background gradient stops */
  --bg-1: #0F172A;
  --bg-2: #1E1B4B;
  --bg-3: #4C1D95;

  /* Glass surfaces */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.14);
  --glass-bg-hover: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.15);
  --glass-border-strong: rgba(255, 255, 255, 0.28);
  --glass-blur: 15px;

  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.72);
  --text-muted: rgba(255, 255, 255, 0.55);
  --text-on-glass: rgba(255, 255, 255, 0.92);

  /* Spacing (4px base) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.24);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.32);
  --glow-primary: 0 0 24px rgba(124, 58, 237, 0.45);
  --glow-accent: 0 0 24px rgba(249, 115, 22, 0.35);

  /* Typography */
  --font-heading: 'Fira Code', 'Fira Sans', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Fira Sans', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Fira Code', 'Consolas', 'Courier New', monospace;

  /* Layout */
  --sidebar-w: 260px;
  --topbar-h: 64px;
  --bottomnav-h: 68px;
  --z-base: 10;
  --z-topbar: 30;
  --z-nav: 40;
  --z-modal: 50;
  --z-toast: 60;

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-1);
  min-height: 100vh;
  overscroll-behavior: contain;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- Animated Aurora Background ---------- */
.aurora-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2), var(--bg-3), var(--bg-1));
  background-size: 400% 400%;
  animation: aurora-shift 24s ease infinite;
}

.aurora-bg::before,
.aurora-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
}

.aurora-bg::before {
  width: 480px;
  height: 480px;
  top: -120px;
  left: -100px;
  background: var(--primary);
  animation: orb-float 18s ease-in-out infinite;
}

.aurora-bg::after {
  width: 420px;
  height: 420px;
  bottom: -140px;
  right: -100px;
  background: var(--accent);
  animation: orb-float 22s ease-in-out infinite reverse;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.aurora-orb.o1 { width: 300px; height: 300px; top: 40%; left: 60%; background: var(--info); animation: orb-float 26s ease-in-out infinite; }
.aurora-orb.o2 { width: 240px; height: 240px; top: 10%; right: 25%; background: var(--secondary); animation: orb-float 20s ease-in-out infinite reverse; }

@keyframes aurora-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.1); }
  66% { transform: translate(-30px, 25px) scale(0.95); }
}

/* ---------- Glass Utility Classes ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-lg);
}

.glass-inset {
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

/* ---------- Focus States (accessibility) ---------- */
:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}