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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--accent-primary-hover);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

ul, ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

::selection {
  background-color: rgba(56, 189, 248, 0.3);
  color: var(--text-primary);
}

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ========================================
   Reveal animation system
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 70ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 140ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 210ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 280ms; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 350ms; }
.reveal-stagger > .reveal:nth-child(7) { transition-delay: 420ms; }
.reveal-stagger > .reveal:nth-child(8) { transition-delay: 490ms; }

/* Hero entrance animations */
@keyframes hero-fade-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes subtle-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}