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

html {
  font-size: 14px;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  font-family: $font-ui;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

  &:hover {
    color: var(--accent-hover);
  }
}

code {
  font-family: $font-code;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: $radius-sm;
  font-size: 0.9em;
}

pre {
  code {
    display: block;
    padding: 16px;
    border-radius: $radius-md;
    overflow-x: auto;
  }
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 80px 24px;

  @media (max-width: $breakpoint-mobile) {
    padding: 48px 16px;
  }
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);

  @media (max-width: $breakpoint-mobile) {
    font-size: 24px;
  }
}

.section-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 640px;
  margin: 0 auto 48px;
}

// ─── Scroll reveal animations ────────────────────────────

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;

  &.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

// ─── Keyframes ────────────────────────────────────────────

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse-border {
  0%, 100% { border-color: var(--border-color); }
  50% { border-color: var(--text-muted); }
}

.animate-fade-in-up {
  animation: fade-in-up 0.7s ease both;
}

.animate-fade-in {
  animation: fade-in 0.5s ease both;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }