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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(124, 92, 255, 0.18), transparent),
    var(--bg);
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

#app {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

section {
  padding: clamp(3rem, 8vw, 6rem) 0;
}

.section__heading {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  text-align: center;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
}

.btn {
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.7rem 1.2rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 30px rgba(124, 92, 255, 0.4);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--fg);
}

.btn--lg {
  padding: 0.95rem 1.7rem;
  font-size: 1.05rem;
}

.particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
}