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

:root {
  --bg-primary: #0d0d1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #242438;
  --bg-overlay: rgba(0, 0, 0, 0.85);

  --text-primary: #ffffff;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;

  --accent-blue: #0088cc;
  --accent-green: #00c853;
  --accent-red: #ff3b5c;
  --accent-orange: #ff9500;
  --accent-glow: rgba(0, 136, 204, 0.4);

  --bubble-left: #2a2a3e;
  --bubble-right: #0088cc;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===========================
   SHARED ANIMATIONS
   =========================== */

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 24px var(--accent-glow), 0 4px 16px rgba(0, 0, 0, 0.3);
  }
  50% {
    box-shadow: 0 0 40px var(--accent-glow), 0 4px 24px rgba(0, 0, 0, 0.4);
  }
}