/* lpi-global.css — Reset, base, typography, layout utilities */

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

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

body {
  font-family: var(--lpi-font-body);
  font-size: var(--lpi-body);
  line-height: 1.65;
  color: var(--lpi-fg-on-light-primary);
  background: var(--lpi-bg-white);
  -webkit-font-smoothing: antialiased;
}

/* Dark-top pages — body bg to match hero */
body.lpi-page--dark-top {
  background: var(--lpi-bg-dark);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

/* ── Container ─────────────────────────────────────────────── */
.lpi-container {
  max-width: var(--lpi-container-max);
  margin: 0 auto;
  padding-left: var(--lpi-gutter);
  padding-right: var(--lpi-gutter);
}

/* ── Section spacing ───────────────────────────────────────── */
.lpi-section {
  padding: var(--lpi-section-pad) 0;
}

@media (max-width: 768px) {
  .lpi-section {
    padding: var(--lpi-section-pad-mobile) 0;
  }
}

/* ── Background contexts ───────────────────────────────────── */
.lpi-bg--dark       { background: var(--lpi-bg-dark); }
.lpi-bg--dark-alt   { background: var(--lpi-bg-dark-alt); }
.lpi-bg--dark-deep  { background: var(--lpi-bg-dark-deep); }
.lpi-bg--light      { background: var(--lpi-bg-light); }
.lpi-bg--white      { background: var(--lpi-bg-white); }
.lpi-bg--rule-stripe { background: var(--lpi-bg-rule-stripe); }

/* ── Eyebrow ───────────────────────────────────────────────── */
.lpi-eyebrow {
  font-family: var(--lpi-font-heading);
  font-size: var(--lpi-eyebrow);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.4;
  margin-bottom: 12px;
  display: block;
}

/* Eyebrow color by container */
.lpi-bg--dark .lpi-eyebrow,
.lpi-bg--dark-alt .lpi-eyebrow,
.lpi-bg--dark-deep .lpi-eyebrow,
.lpi-hero--dark .lpi-eyebrow,
.lpi-footer .lpi-eyebrow {
  color: var(--lpi-accent-aa-on-dark);
}

.lpi-bg--light .lpi-eyebrow,
.lpi-bg--white .lpi-eyebrow,
.lpi-bg--rule-stripe .lpi-eyebrow {
  color: var(--lpi-accent-aa-on-light);
}

/* ── Headings ──────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--lpi-font-heading);
  font-weight: 700;
  line-height: 1.2;
}

/* Heading colors by context */
.lpi-bg--dark h1,
.lpi-bg--dark h2,
.lpi-bg--dark h3,
.lpi-bg--dark h4,
.lpi-bg--dark-alt h1,
.lpi-bg--dark-alt h2,
.lpi-bg--dark-alt h3,
.lpi-bg--dark-deep h1,
.lpi-bg--dark-deep h2,
.lpi-bg--dark-deep h3 {
  color: var(--lpi-fg-on-dark-primary);
}

.lpi-bg--light h1,
.lpi-bg--light h2,
.lpi-bg--light h3,
.lpi-bg--light h4,
.lpi-bg--white h1,
.lpi-bg--white h2,
.lpi-bg--white h3,
.lpi-bg--white h4,
.lpi-bg--rule-stripe h1,
.lpi-bg--rule-stripe h2,
.lpi-bg--rule-stripe h3 {
  color: var(--lpi-fg-on-light-primary);
}

/* ── Body text by context ──────────────────────────────────── */
.lpi-bg--dark p,
.lpi-bg--dark li,
.lpi-bg--dark-alt p,
.lpi-bg--dark-alt li,
.lpi-bg--dark-deep p,
.lpi-bg--dark-deep li {
  color: var(--lpi-fg-on-dark-secondary);
}

.lpi-bg--light p,
.lpi-bg--light li,
.lpi-bg--white p,
.lpi-bg--white li,
.lpi-bg--rule-stripe p,
.lpi-bg--rule-stripe li {
  color: var(--lpi-fg-on-light-secondary);
}

/* ── Metric numbers (IBM Plex Mono) ────────────────────────── */
.lpi-metric {
  font-family: var(--lpi-font-mono);
  font-size: var(--lpi-metric);
  font-weight: 500;
  line-height: 1.1;
}

.lpi-bg--dark .lpi-metric,
.lpi-bg--dark-alt .lpi-metric,
.lpi-bg--dark-deep .lpi-metric {
  color: var(--lpi-fg-on-dark-primary);
}

.lpi-bg--light .lpi-metric,
.lpi-bg--rule-stripe .lpi-metric {
  color: var(--lpi-fg-on-light-primary);
}

/* Data inline mono (smaller metrics) */
.lpi-mono {
  font-family: var(--lpi-font-mono);
  font-size: inherit;
}

/* ── Fade-in animation ─────────────────────────────────────── */
.lpi-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.lpi-fade-in.lpi-visible {
  opacity: 1;
  transform: none;
}

/* Failsafe: reveal after 1.2s regardless */
@keyframes lpi-reveal {
  to { opacity: 1; transform: none; }
}

.lpi-fade-in {
  animation: lpi-reveal 0.5s ease 1.2s forwards;
}

/* ── Dividers ──────────────────────────────────────────────── */
.lpi-divider {
  border: none;
  border-top: 1px solid rgba(139, 116, 255, 0.15);
  margin: 48px 0;
}

/* ── Process node badge ────────────────────────────────────── */
.lpi-node-badge {
  font-family: var(--lpi-font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--lpi-radius-sm);
  border: 1px solid rgba(139, 116, 255, 0.4);
  color: var(--lpi-accent-aa-on-dark);
  background: rgba(91, 63, 228, 0.1);
  display: inline-block;
}

/* ── Grid helpers ──────────────────────────────────────────── */
.lpi-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--lpi-gutter);
}

.lpi-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--lpi-gutter);
}

.lpi-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--lpi-gutter);
}

@media (max-width: 1024px) {
  .lpi-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .lpi-grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .lpi-grid-2,
  .lpi-grid-3,
  .lpi-grid-4 { grid-template-columns: 1fr; }
}

/* ── Text utilities ────────────────────────────────────────── */
.lpi-text-center { text-align: center; }
.lpi-text-left   { text-align: left; }
.lpi-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ── Section intro block ───────────────────────────────────── */
.lpi-section-intro {
  max-width: 640px;
  margin-bottom: 56px;
}

.lpi-section-intro--center {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}

.lpi-section-intro h2 {
  font-size: var(--lpi-h2);
  margin-bottom: 16px;
}

.lpi-section-intro p {
  font-size: 1.0625rem;
  line-height: 1.65;
}