/* ═══════════════════════════════════════════════════════════
   GLOBAL — Reset · Base · Layout · Typography utilities
═══════════════════════════════════════════════════════════ */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--body-lg);
  line-height: 1.6;
  color: var(--on-surface);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select { font: inherit; }

/* ── Container ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ── Typography Classes ────────────────────────────────── */
.display-lg {
  font-family: var(--font-display);
  font-size: var(--display-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.08;
}
.display-md {
  font-family: var(--font-display);
  font-size: var(--display-md);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
.display-sm {
  font-family: var(--font-display);
  font-size: var(--display-sm);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.18;
}
.headline-lg {
  font-family: var(--font-display);
  font-size: var(--headline-lg);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.25;
}
.headline-md {
  font-family: var(--font-display);
  font-size: var(--headline-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.headline-sm {
  font-family: var(--font-display);
  font-size: var(--headline-sm);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.label-md {
  font-family: var(--font-body);
  font-size: var(--label-md);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.label-sm {
  font-family: var(--font-body);
  font-size: var(--label-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── Color Utilities ───────────────────────────────────── */
.text-on-primary      { color: var(--on-primary); }
.text-primary         { color: var(--primary); }
.text-secondary       { color: var(--secondary); }
.text-tertiary        { color: var(--tertiary); }
.text-on-surface      { color: var(--on-surface); }
.text-on-surface-var  { color: var(--on-surface-variant); }

/* ── Scroll Reveal ─────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }
.delay-400 { transition-delay: 400ms; }

/* ── Accessibility ─────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: 2px solid var(--tertiary);
  outline-offset: 3px;
}