/* =============================================================================
   IronClaw landing page (home) — IRO-154.

   A conversion-focused homepage rendered through the MkDocs Material
   `overrides/home.html` template (set via `template: home.html` in index.md).
   It reuses the steel-blue brand scale from brand.css and the Material theme
   surface variables so the page flips cleanly with the light/dark toggle.

   Design system
   -------------
   - Steel-blue brand (#3b82f6 / #2563eb), navy hero (#0b1124 -> #16224a).
   - One spacing scale, one type scale (clamp()-driven, fluid + mobile-first).
   - Full-bleed coloured sections, 1100px centred content column.
   - Contrast targets (WCAG 2.1 AA): body >= 4.5:1, large/CTA text >= 3:1.
     Primary CTA = white on #2563eb (5.17:1). Hero body = white on #0b1124.

   Only loaded on the home template, but scoped under `.iro-landing` so it
   cannot leak into the docs body.
   ========================================================================== */

.iro-landing {
  /* spacing scale */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4.5rem;

  --iro-radius: 0.6rem;
  --iro-maxw: 1100px;

  /* brand (mirrors brand.css; redeclared so the landing is self-contained) */
  --iro-steel-500: #3b82f6;
  --iro-steel-600: #2563eb;
  --iro-steel-700: #1d4ed8;
  --iro-navy-900: #16224a;
  --iro-navy-950: #0b1124;

  font-feature-settings: "kern" 1, "liga" 1;
}

/* Material wraps content in a constrained grid; the home template renders the
   landing directly in <main>, so reset any inherited width/padding. */
.iro-landing {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
}

/* The landing replaces `.md-content` inside `.md-main__inner.md-grid`, which is
   capped at ~61rem and centred. On the home route only, break out of that cap so
   the full-bleed coloured sections span the viewport. `hide: [navigation, toc]`
   in index.md already removes both sidebars; this reclaims their grid width. */
.md-main__inner:has(> .iro-landing) {
  max-width: none;
  margin: 0;
}
.md-main:has(.iro-landing),
.md-main__inner:has(> .iro-landing) {
  margin-top: 0;
}
/* The themed header already provides a top landmark + nav; no breadcrumbs. */
.md-content__inner:has(.iro-landing) { margin: 0; padding: 0; }

/* ----- layout primitives -------------------------------------------------- */
.iro-section {
  padding: clamp(3rem, 7vw, 5rem) 1.25rem;
}
.iro-wrap {
  max-width: var(--iro-maxw);
  margin-inline: auto;
}
.iro-section--tint {
  background: var(--md-default-fg-color--lightest);
}

/* ----- type -------------------------------------------------------------- */
.iro-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  /* Scheme-aware accent: AA on both white (#1d4ed8 6.7:1) and dark slate
     (#63a0ff 6.08:1). A fixed steel-500 would fail AA on light backgrounds. */
  color: var(--md-accent-fg-color);
  margin: 0 0 var(--s-4);
}
.iro-h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 var(--s-3);
}
.iro-h3 {
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.2;
  /* Separates the two clips inside the demo section as a distinct movement. */
  margin: var(--s-7) 0 var(--s-3);
}
.iro-lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.65;
  max-width: 60ch;
  margin: 0 0 var(--s-6);
  color: var(--md-default-fg-color);
}

/* =============================================================================
   1. HERO  — always-dark navy, high contrast
   ========================================================================== */
.iro-hero {
  position: relative;
  background:
    radial-gradient(120% 120% at 80% -10%, rgba(59, 130, 246, 0.28) 0%, rgba(59, 130, 246, 0) 55%),
    linear-gradient(160deg, var(--iro-navy-900) 0%, var(--iro-navy-950) 70%);
  color: #f4f8ff;
  border-bottom: 1px solid rgba(99, 160, 255, 0.18);
  overflow: hidden;
}
.iro-hero .iro-eyebrow {
  color: #8fb4ff;
}
.iro-hero__title {
  font-size: clamp(2.1rem, 5.2vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.07;
  margin: 0 0 var(--s-5);
  max-width: 18ch;
}
.iro-hero__sub {
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
  line-height: 1.6;
  color: #c7d6f0;
  max-width: 56ch;
  margin: 0 0 var(--s-6);
}
.iro-hero__sub strong {
  color: #ffffff;
  font-weight: 700;
}

/* ----- CTA buttons ------------------------------------------------------- */
.iro-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-bottom: var(--s-6);
}
.iro-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  min-height: 2.9rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--iro-radius);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}
.iro-btn--primary {
  background: var(--iro-steel-600);
  color: #ffffff;
  box-shadow: 0 0.3rem 1rem rgba(37, 99, 235, 0.35);
}
.iro-btn--primary:hover {
  background: var(--iro-steel-700);
  transform: translateY(-1px);
}
.iro-btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(143, 180, 255, 0.55);
  color: #eaf2ff;
}
.iro-btn--ghost:hover {
  background: rgba(143, 180, 255, 0.12);
  border-color: #8fb4ff;
  transform: translateY(-1px);
}
/* On light sections, ghost buttons use the steel outline */
.iro-section .iro-btn--ghost {
  background: transparent;
  border-color: var(--iro-steel-600);
  color: var(--iro-steel-700);
}
.iro-section .iro-btn--ghost:hover {
  background: var(--md-accent-fg-color--transparent);
}
.iro-btn:focus-visible {
  outline: 3px solid #8fb4ff;
  outline-offset: 2px;
}

/* ----- copyable demo block ----------------------------------------------- */
.iro-code {
  position: relative;
  margin: 0 0 var(--s-4);
  max-width: 760px;
}
.iro-code pre {
  margin: 0;
  background: #0a1126;
  border: 1px solid rgba(99, 160, 255, 0.28);
  border-radius: var(--iro-radius);
  /* extra right pad keeps the first wrapped line clear of the Copy button */
  padding: 1rem 4.5rem 1rem 1.1rem;
  /* wrap the install one-liner so it stays inside the card at every width
     (mobile included) instead of scrolling off-screen under the Copy button */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  font-size: 0.86rem;
  line-height: 1.6;
  color: #d7e3fb;
  -moz-tab-size: 2;
  tab-size: 2;
}
.iro-code code {
  font-family: var(--md-code-font-family, ui-monospace, SFMono-Regular, Menlo, monospace);
  background: none;
  padding: 0;
  color: inherit;
  white-space: inherit;
}
.iro-code__prompt { color: #6f86b8; user-select: none; }
.iro-code__cmt { color: #6f86b8; }
.iro-copy {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  height: 2rem;
  padding: 0 0.65rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: #c7d6f0;
  background: rgba(99, 160, 255, 0.12);
  border: 1px solid rgba(99, 160, 255, 0.3);
  border-radius: 0.4rem;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}
.iro-copy:hover { background: rgba(99, 160, 255, 0.24); color: #fff; }
.iro-copy:focus-visible { outline: 3px solid #8fb4ff; outline-offset: 2px; }
.iro-copy[data-copied="true"] { color: #7ef0c0; border-color: rgba(126, 240, 192, 0.5); }
.iro-caption {
  font-size: 0.92rem;
  line-height: 1.55;
  color: #aebfe0;
  max-width: 70ch;
  margin: 0;
}
.iro-caption strong { color: #eaf2ff; }
.iro-caption code,
.iro-section code {
  background: rgba(99, 160, 255, 0.14);
  border-radius: 0.25rem;
  padding: 0.05em 0.4em;
  font-size: 0.88em;
}
.iro-section code { background: var(--md-accent-fg-color--transparent); }

/* ----- trust badge row --------------------------------------------------- */
.iro-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(143, 180, 255, 0.18);
}
.iro-badges img { height: 22px; display: block; }
.iro-badges a:focus-visible { outline: 3px solid #8fb4ff; outline-offset: 3px; border-radius: 3px; }
.iro-badges__note {
  flex-basis: 100%;
  margin: var(--s-2) 0 0;
  font-size: 0.82rem;
  color: #9fb2d8;
}
.iro-badges__note a { color: #8fb4ff; }

/* =============================================================================
   2. DIFFERENTIATORS
   ========================================================================== */
.iro-grid-3 {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: 1fr;
  margin-top: var(--s-6);
}
.iro-card {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: var(--iro-radius);
  padding: var(--s-5);
  transition: border-color 125ms ease, box-shadow 125ms ease, transform 125ms ease;
}
.iro-card:hover {
  border-color: var(--iro-steel-500);
  box-shadow: 0 0.3rem 0.9rem rgba(37, 99, 235, 0.16);
  transform: translateY(-2px);
}
.iro-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  margin-bottom: var(--s-3);
  border-radius: 0.55rem;
  background: var(--md-accent-fg-color--transparent);
  color: var(--iro-steel-600);
}
.iro-card__icon svg { width: 1.4rem; height: 1.4rem; }
.iro-card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0 0 var(--s-2);
}
.iro-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--md-default-fg-color);
}
.iro-card code { word-break: break-word; }
.iro-aside {
  margin-top: var(--s-5);
  font-size: 0.98rem;
  color: var(--md-default-fg-color--light);
}
.iro-aside strong { color: var(--md-default-fg-color); }

/* =============================================================================
   3. HOW IT WORKS
   ========================================================================== */
.iro-steps {
  display: grid;
  gap: var(--s-5);
  grid-template-columns: 1fr;
  margin-top: var(--s-6);
  counter-reset: step;
}
.iro-step {
  position: relative;
  padding-left: 3.4rem;
}
.iro-step__num {
  position: absolute;
  left: 0;
  top: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--iro-steel-600);
  color: #fff;
  font-weight: 800;
  font-size: 1.05rem;
}
.iro-step h3 { font-size: 1.1rem; font-weight: 700; margin: 0.2rem 0 var(--s-2); }
.iro-step p { margin: 0; line-height: 1.6; color: var(--md-default-fg-color); font-size: 0.95rem; }
.iro-flow {
  margin-top: var(--s-6);
  text-align: center;
  font-size: 0.9rem;
  color: var(--md-default-fg-color--light);
}
.iro-flow code {
  font-weight: 600;
  white-space: nowrap;
}

/* =============================================================================
   4. PROOF STRIP
   ========================================================================== */
.iro-proof {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: 1fr;
  margin-top: var(--s-6);
}
.iro-proof h3 {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--md-accent-fg-color);
  margin: 0 0 var(--s-4);
  padding-bottom: var(--s-2);
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
}
.iro-checklist { list-style: none; margin: 0; padding: 0; }
.iro-checklist li {
  position: relative;
  padding-left: 1.9rem;
  margin-bottom: var(--s-3);
  line-height: 1.55;
  font-size: 0.95rem;
  color: var(--md-default-fg-color);
}
.iro-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--iro-steel-600);
  -webkit-mask: var(--iro-check) center / contain no-repeat;
  mask: var(--iro-check) center / contain no-repeat;
}
.iro-landing {
  --iro-check: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="black" d="M9 16.17 4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z"/></svg>');
}
.iro-checklist li strong { color: var(--md-default-fg-color); }
.iro-pullquote {
  margin: var(--s-7) auto 0;
  max-width: 46ch;
  text-align: center;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 600;
  line-height: 1.45;
  color: var(--md-default-fg-color);
  border: none;
}
.iro-pullquote cite {
  display: block;
  margin-top: var(--s-3);
  font-size: 0.85rem;
  font-weight: 500;
  font-style: normal;
  color: var(--md-default-fg-color--light);
}
.iro-center-cta { text-align: center; margin-top: var(--s-6); }

/* =============================================================================
   5. DEMO BLOCK (light section)  — code panel reads on light bg
   ========================================================================== */
.iro-demo .iro-code pre {
  background: var(--iro-navy-950);
}
.iro-demo .iro-caption,
.iro-demo .iro-footnote {
  color: var(--md-default-fg-color--light);
}
.iro-demo .iro-caption strong { color: var(--md-default-fg-color); }

/* Animated terminal re-enactment — framed to match the code/card panels. */
.iro-cast {
  margin: 0 0 var(--s-5);
  max-width: 760px;
}
.iro-cast img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(99, 160, 255, 0.28);
  border-radius: var(--iro-radius);
  background: var(--iro-navy-950);
  box-shadow: 0 0.4rem 1.2rem rgba(11, 17, 36, 0.18);
}
.iro-cast__cap {
  margin: 0.55rem 0 0;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--md-default-fg-color--light);
}
.iro-footnote {
  margin: var(--s-4) 0 0;
  font-size: 0.86rem;
  line-height: 1.55;
  max-width: 70ch;
  padding-left: var(--s-4);
  border-left: 3px solid var(--md-default-fg-color--lightest);
}

/* =============================================================================
   6. FAQ  — native <details>, zero JS
   ========================================================================== */
.iro-faq { margin-top: var(--s-6); max-width: 820px; }
.iro-faq details {
  border-bottom: 1px solid var(--md-default-fg-color--lightest);
}
.iro-faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-4);
  padding: var(--s-4) 0;
  font-weight: 600;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
}
.iro-faq summary::-webkit-details-marker { display: none; }
.iro-faq summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--iro-steel-600);
  transition: transform 150ms ease;
  flex: none;
}
.iro-faq details[open] summary::after { content: "\2212"; }
.iro-faq summary:focus-visible { outline: 3px solid var(--iro-steel-500); outline-offset: 3px; border-radius: 4px; }
.iro-faq p {
  margin: 0 0 var(--s-4);
  line-height: 1.65;
  color: var(--md-default-fg-color);
  max-width: 75ch;
}

/* =============================================================================
   7. FINAL CTA  — dark band, repeats the primary action
   ========================================================================== */
.iro-final {
  background: linear-gradient(160deg, var(--iro-navy-900) 0%, var(--iro-navy-950) 100%);
  color: #f4f8ff;
  text-align: center;
}
.iro-final .iro-h2 { color: #fff; }
.iro-final p { color: #c7d6f0; max-width: 52ch; margin: 0 auto var(--s-6); line-height: 1.6; }
.iro-final .iro-cta-row { justify-content: center; margin-bottom: var(--s-4); }
.iro-final .iro-btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(143, 180, 255, 0.55);
  color: #eaf2ff;
}
.iro-final .iro-btn--ghost:hover { background: rgba(143, 180, 255, 0.12); }
.iro-final__link { display: inline-block; margin-top: var(--s-2); color: #8fb4ff; font-weight: 600; }

/* =============================================================================
   8. FOOTER  (overrides the theme footer on the home template)
   ========================================================================== */
.iro-footer {
  background: var(--iro-navy-950);
  color: #aebfe0;
  padding: clamp(2.5rem, 5vw, 3.5rem) 1.25rem 2rem;
  border-top: 1px solid rgba(99, 160, 255, 0.18);
}
.iro-footer__cols {
  max-width: var(--iro-maxw);
  margin: 0 auto;
  display: grid;
  gap: var(--s-6);
  grid-template-columns: 1fr;
}
.iro-footer h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #8fb4ff;
  margin: 0 0 var(--s-3);
}
.iro-footer ul { list-style: none; margin: 0; padding: 0; }
.iro-footer li { margin-bottom: var(--s-2); }
.iro-footer a { color: #cdd9f0; text-decoration: none; font-size: 0.92rem; }
.iro-footer a:hover { color: #fff; text-decoration: underline; }
.iro-footer a:focus-visible { outline: 2px solid #8fb4ff; outline-offset: 2px; border-radius: 2px; }
.iro-footer__base {
  max-width: var(--iro-maxw);
  margin: var(--s-6) auto 0;
  padding-top: var(--s-5);
  border-top: 1px solid rgba(143, 180, 255, 0.16);
  font-size: 0.85rem;
  color: #8295bd;
}

/* =============================================================================
   Responsive — widen grids on larger viewports
   ========================================================================== */
@media (min-width: 720px) {
  .iro-grid-3 { grid-template-columns: repeat(3, 1fr); }
  .iro-steps { grid-template-columns: repeat(3, 1fr); }
  .iro-proof { grid-template-columns: 1fr 1fr; gap: var(--s-7); }
  .iro-footer__cols { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 960px) {
  .iro-section { padding-inline: 2rem; }
}

/* =============================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  .iro-landing * { transition: none !important; }
  .iro-card:hover,
  .iro-btn:hover { transform: none; }
}

/* =============================================================================
   WCAG AA contrast fixes (IRO-166)

   Live-rendered audit of both schemes (composited contrast, gradient/always-dark
   hero+final excluded as known-good white-on-navy) surfaced four sub-AA cases.
   Each fix was verified on the live site to clear its threshold in both schemes.
   ========================================================================== */

/* Secondary/caption text used `--md-default-fg-color--light`, which composited to
   3.6:1 (slate) / 4.3:1 (light) on the tinted sections — below the 4.5:1 body
   minimum, and these carry real content (the demo "Then open …" run path, the
   gateway flow caption). Promote to the full-strength foreground token. */
.iro-flow,
.iro-aside,
.iro-demo .iro-caption,
.iro-demo .iro-footnote {
  color: var(--md-default-fg-color);
}

/* Code-panel prompt/comment tokens sat at 4.33:1 on the always-dark navy panel
   (scheme-independent). Lighten to clear 4.5:1. */
.iro-code__cmt,
.iro-code__prompt {
  color: #8ea4cf;
}

/* Slate only: the `.iro-section .iro-btn--ghost` and accent-eyebrow rules assume
   a LIGHT section background (steel-700 text = 6.7:1 on white). In dark mode the
   tinted sections are dark, so that ghost-button text fell to 2.38:1 and the
   accent eyebrow to 4.40:1. Restore the dark-surface treatment for slate. */
[data-md-color-scheme="slate"] .iro-section .iro-btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(143, 180, 255, 0.55);
  color: #eaf2ff;
}
[data-md-color-scheme="slate"] .iro-section .iro-btn--ghost:hover {
  background: rgba(143, 180, 255, 0.12);
  border-color: #8fb4ff;
}
[data-md-color-scheme="slate"] .iro-eyebrow,
[data-md-color-scheme="slate"] .iro-proof h3 {
  color: #8fb4ff;
}