/* ── Landing page styles ─────────────────────── */

/* t-00364 — WCAG AA color-contrast override.
   Default `--kr-color-primary` = #4a6cf7 yields ratio 4.39 on white,
   which is below the 4.5:1 AA threshold for body text on coloured
   buttons. Tighten the landing-page palette so axe-core reports zero
   violations without changing the framework dist (dist/kairo.min.css
   is shipped to adopters as-is).
   - primary 4a6cf7 → 4361e8  (ratio 4.59, AA pass)
   - danger  ef4444 → dc2626  (ratio 5.16, AA pass) */
:root {
  --kr-color-primary: #4361e8;
  --kr-color-danger: #dc2626;
}

/* t-00364 — `.kr-badge--success` foreground is computed as
   `color-mix(oklab, var(--kr-color-success), black 20%)`. With the
   default success token (#10b981) that yields #09885e on a 15%-mix
   background → 3.82:1 ratio. Override the foreground to a darker
   green (#057045, 5.33:1) for the landing-page badge. */
.kr-badge.kr-badge--success {
  --_fg: #057045;
}

/* t-00363 — explicit @font-face with font-display: swap.
   Without an explicit declaration the browser uses the OS-default
   font-display strategy, which on Chrome is "auto" → block-then-fail
   for ~3s (FOIT). `swap` shows the system fallback immediately and
   swaps to the variable font once it loads, eliminating LCP penalty
   and silencing Lighthouse's "Ensure text remains visible" audit. */
@font-face {
  font-family: 'Inter';
  src: url('/fonts/InterVariable.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  src: url('/fonts/InterVariable-Italic.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Fraunces';
  src: url('/fonts/FrauncesVariable.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/JetBrainsMonoVariable.ttf') format('truetype-variations');
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

html {
  scroll-behavior: smooth;
}
section[id] {
  scroll-margin-top: 4.5rem;
}

/* t-00456 — skip-link: hidden until keyboard-focused, then pinned to the top. */
.skip-link {
  position: absolute;
  inset-inline-start: 1rem;
  inset-block-start: -3rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--kr-color-bg, #fff);
  color: var(--kr-color-text, #000);
  border: 2px solid currentcolor;
  border-radius: 0.25rem;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  inset-block-start: 0.5rem;
  outline: 2px solid var(--kr-color-primary, #4a6cf7);
  outline-offset: 2px;
}
/* Suppress focus ring on the wrapping <main> (programmatic focus only). */
main:focus,
main:focus-visible {
  outline: none;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--kr-z-sticky);
  background: color-mix(in srgb, var(--kr-color-bg) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-block-end: 1px solid var(--kr-color-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.75rem;
  gap: var(--kr-space-4);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--kr-space-4);
  list-style: none;
}
.nav__links a {
  color: var(--kr-color-text-muted);
  text-decoration: none;
  font-size: var(--kr-text-sm);
  font-weight: 500;
  transition: color var(--kr-duration-fast);
}
.nav__links a:hover {
  color: var(--kr-color-text);
}
@media (max-width: 48em) {
  .nav__links--main {
    display: none;
  }
}
.logo {
  font-family: var(--kr-font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--kr-color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

/* Hero */
.hero {
  --_glow: color-mix(in srgb, var(--kr-color-primary) 8%, transparent);
  padding-block: var(--kr-space-10) var(--kr-space-8);
  background:
    radial-gradient(ellipse at 20% 80%, var(--_glow) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, var(--_glow) 0%, transparent 50%), var(--kr-color-bg);
}
.hero__title {
  font-family: var(--kr-font-heading);
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--kr-color-text) 40%, var(--kr-color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 48rem;
}
.hero__subtitle {
  font-size: var(--kr-text-lg);
  color: var(--kr-color-text-muted);
  max-width: 38rem;
  line-height: 1.6;
}

/* Stats */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kr-space-6);
  justify-content: center;
}
.stat {
  text-align: center;
  min-width: 7rem;
}
.stat__number {
  font-family: var(--kr-font-heading);
  font-size: var(--kr-text-3xl);
  font-weight: 800;
  color: var(--kr-color-primary);
  line-height: 1.2;
}
.stat__label {
  color: var(--kr-color-text-muted);
  font-size: var(--kr-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

/* Sections */
.section {
  padding-block: var(--kr-space-8);
}
.section--alt {
  background: var(--kr-color-surface);
}
.section__header {
  margin-block-end: var(--kr-space-6);
}
.section__title {
  font-size: var(--kr-text-3xl);
  font-weight: 700;
  margin-block-end: var(--kr-space-2);
}
.section__subtitle {
  color: var(--kr-color-text-muted);
  font-size: var(--kr-text-lg);
  max-width: 40rem;
  line-height: 1.6;
}

/* Feature cards */
.feature-card {
  transition:
    transform var(--kr-duration-fast),
    box-shadow var(--kr-duration-fast);
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--kr-shadow-lg);
}
.feature-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: var(--kr-radius-lg);
  background: color-mix(in srgb, var(--kr-color-primary) 12%, transparent);
  color: var(--kr-color-primary);
  margin-block-end: var(--kr-space-3);
}
.feature-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Grid demo cells */
.grid-cell {
  background: color-mix(in srgb, var(--kr-color-primary) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--kr-color-primary) 20%, transparent);
  border-radius: var(--kr-radius-sm);
  padding: var(--kr-space-2) var(--kr-space-3);
  text-align: center;
  font-size: var(--kr-text-xs);
  font-family: var(--kr-font-mono);
  /* t-00364 — darker primary shade for AA contrast on the 10%-tinted
     background. Plain `--kr-color-primary` mixed at 10% lifts the
     effective bg to ~#eceffd, which only yields 4.46:1 against the
     base primary; use #3754d4 (5.42:1) explicitly. */
  color: light-dark(#3754d4, #93a8ff);
  font-weight: 600;
}

/* Showcase box */
.showcase {
  background: var(--kr-color-surface);
  border: 1px solid var(--kr-color-border);
  border-radius: var(--kr-radius-lg);
  padding: var(--kr-space-5);
}
.section--alt .showcase {
  background: var(--kr-color-bg);
}
.showcase__label {
  font-size: var(--kr-text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--kr-color-text-muted);
  margin-block-end: var(--kr-space-3);
}

/* Preset buttons */
.preset-row {
  display: flex;
  gap: var(--kr-space-3);
  flex-wrap: wrap;
  align-items: center;
}
.preset-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--kr-radius-full);
  border: 3px solid var(--kr-color-border);
  cursor: pointer;
  transition:
    transform var(--kr-duration-fast),
    border-color var(--kr-duration-fast);
  padding: 0;
}
.preset-btn:hover {
  transform: scale(1.15);
}
.preset-btn[aria-pressed='true'] {
  border-color: var(--kr-color-text);
  box-shadow:
    0 0 0 2px var(--kr-color-bg),
    0 0 0 4px var(--kr-color-text);
}

/* Color preset backgrounds */
.preset-btn--default {
  background: linear-gradient(135deg, #6366f1, #818cf8);
}
.preset-btn--ocean {
  background: linear-gradient(135deg, #0284c7, #38bdf8);
}
.preset-btn--forest {
  background: linear-gradient(135deg, #16a34a, #4ade80);
}
.preset-btn--rose {
  background: linear-gradient(135deg, #e11d48, #fb7185);
}
.preset-btn--sunset {
  background: linear-gradient(135deg, #ea580c, #fb923c);
}

/* Code block */
.code-block {
  background: light-dark(#1e293b, #0f172a);
  color: #e2e8f0;
  border-radius: var(--kr-radius-lg);
  padding: var(--kr-space-4) var(--kr-space-5);
  font-family: var(--kr-font-mono);
  font-size: var(--kr-text-sm);
  line-height: 1.8;
  overflow-x: auto;
  white-space: pre;
}
/* t-00364 — keyboard focus ring for the scrollable code blocks
   (axe scrollable-region-focusable requires the region to be focusable;
   the visual outline confirms the focus is reachable). */
.code-block:focus-visible {
  outline: 2px solid var(--kr-color-primary);
  outline-offset: 2px;
}
.code-block .t {
  color: #7dd3fc;
}
.code-block .a {
  color: #c4b5fd;
}
.code-block .s {
  color: #86efac;
}
/* t-00364 — comment color #64748b on #1e293b yielded 3.07:1, below
   the 4.5:1 AA threshold. Lift to slate-400 #94a3b8 (5.71:1). */
.code-block .c {
  color: #94a3b8;
}
.code-block .k {
  color: #f9a8d4;
}

/* Type scale */
.type-row {
  display: flex;
  align-items: baseline;
  gap: var(--kr-space-4);
  padding-block: var(--kr-space-2);
  border-block-end: 1px solid var(--kr-color-border);
}
.type-row:last-child {
  border: none;
}
.type-label {
  font-family: var(--kr-font-mono);
  font-size: var(--kr-text-xs);
  color: var(--kr-color-text-muted);
  min-width: 5rem;
  flex-shrink: 0;
}

/* Type scale demo spans */
.lp-type-5xl {
  font-size: var(--kr-text-5xl);
  font-weight: 700;
  line-height: 1.1;
}
.lp-type-4xl {
  font-size: var(--kr-text-4xl);
  font-weight: 700;
  line-height: 1.1;
}
.lp-type-3xl {
  font-size: var(--kr-text-3xl);
  font-weight: 600;
  line-height: 1.2;
}
.lp-type-2xl {
  font-size: var(--kr-text-2xl);
  font-weight: 600;
  line-height: 1.2;
}
.lp-type-xl {
  font-size: var(--kr-text-xl);
  font-weight: 500;
  line-height: 1.3;
}
.lp-type-lg {
  font-size: var(--kr-text-lg);
  line-height: 1.4;
}
.lp-type-base {
  font-size: var(--kr-text-base);
  line-height: 1.5;
}
.lp-type-sm {
  font-size: var(--kr-text-sm);
  line-height: 1.5;
}
.lp-type-xs {
  font-size: var(--kr-text-xs);
  line-height: 1.5;
}

/* Font preview */
.font-preview {
  padding: var(--kr-space-4);
  border: 1px solid var(--kr-color-border);
  border-radius: var(--kr-radius-lg);
}
.font-preview__name {
  font-size: var(--kr-text-xs);
  font-family: var(--kr-font-mono);
  color: var(--kr-color-text-muted);
  margin-block-end: var(--kr-space-1);
}

/* Font preview samples */
.lp-font-heading-sample {
  font-family: var(--kr-font-heading);
  font-size: var(--kr-text-2xl);
  font-weight: 600;
  line-height: 1.3;
}
.lp-font-body-sample {
  font-family: var(--kr-font-body);
  font-size: var(--kr-text-base);
  line-height: 1.6;
}
.lp-font-mono-sample {
  font-family: var(--kr-font-mono);
  font-size: var(--kr-text-sm);
  line-height: 1.6;
}

/* Footer */
.footer {
  border-block-start: 1px solid var(--kr-color-border);
  padding-block: var(--kr-space-6);
  text-align: center;
  color: var(--kr-color-text-muted);
  font-size: var(--kr-text-sm);
}
.footer p {
  margin-inline: auto;
}

/* Helpers */
.text-center {
  text-align: center;
}
.mx-auto {
  margin-inline: auto;
}
.gap-2 {
  gap: var(--kr-space-2);
}
.gap-3 {
  gap: var(--kr-space-3);
}
.gap-4 {
  gap: var(--kr-space-4);
}
.mt-2 {
  margin-block-start: var(--kr-space-2);
}
.mt-4 {
  margin-block-start: var(--kr-space-4);
}
.mb-4 {
  margin-block-end: var(--kr-space-4);
}
.w-full {
  width: 100%;
}

/* ── Landing-page utility classes (lp-*) replacing inline style= attrs ── */

/* Hero section */
.lp-hero-inner {
  align-items: center;
  gap: var(--kr-space-5);
}
.lp-hero-cta {
  gap: var(--kr-space-3);
  justify-content: center;
}
.lp-hero-divider {
  max-width: 32rem;
  width: 100%;
  margin-block: var(--kr-space-4);
}

/* Feature grid */
.lp-grid-gap-4 {
  --kr-grid-gap: var(--kr-space-4);
}
.lp-card-full-height {
  height: 100%;
}
.lp-feature-h3 {
  margin-block-end: var(--kr-space-2);
}
.lp-feature-p {
  color: var(--kr-color-text-muted);
  font-size: var(--kr-text-sm);
}

/* Component tabs / panels */
.lp-cluster-wrap {
  flex-wrap: wrap;
}
.lp-cluster-center-wrap {
  align-items: center;
  flex-wrap: wrap;
}
.lp-cluster-form-controls {
  flex-wrap: wrap;
}
.lp-cluster-badges {
  flex-wrap: wrap;
}

/* Accordion content padding */
.lp-accordion-body {
  padding: var(--kr-space-3) var(--kr-space-4);
}

/* Modal paragraph spacing */
.lp-modal-p {
  margin-block-start: var(--kr-space-3);
  color: var(--kr-color-text-muted);
}

/* Grid section */
.lp-grid-stack {
  gap: var(--kr-space-3);
}
.lp-grid-gap-2 {
  --kr-grid-gap: var(--kr-space-2);
}

/* Typography section */
.lp-grid-gap-5 {
  --kr-grid-gap: var(--kr-space-5);
}
.lp-font-stack {
  gap: var(--kr-space-3);
}
.lp-type-stack {
  gap: 0;
}

/* Theming section */
.lp-theme-controls {
  gap: var(--kr-space-5);
}
.lp-code-xs {
  font-size: var(--kr-text-xs);
}

/* Dashboard preview card */
.lp-dashboard-cluster {
  justify-content: space-between;
  align-items: start;
  flex-wrap: wrap;
  gap: var(--kr-space-3);
}
.lp-dashboard-p {
  color: var(--kr-color-text-muted);
  font-size: var(--kr-text-sm);
}
.lp-divider-sm {
  margin-block: var(--kr-space-3);
}
.lp-grid-gap-3 {
  --kr-grid-gap: var(--kr-space-3);
}

/* Dashboard stat boxes */
.lp-stat-box {
  padding: var(--kr-space-3);
  background: var(--kr-color-surface);
  border-radius: var(--kr-radius-md);
  border: 1px solid var(--kr-color-border);
}
.lp-stat-number {
  font-size: var(--kr-text-2xl);
  font-weight: 700;
  color: var(--kr-color-primary);
}
.lp-stat-label {
  font-size: var(--kr-text-xs);
  color: var(--kr-color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Get Started section */
.lp-container-narrow {
  max-width: 48rem;
}
.lp-stack-gap-4 {
  gap: var(--kr-space-4);
}
.lp-note-p {
  color: var(--kr-color-text-muted);
  margin-block-end: var(--kr-space-4);
}

/* Footer */
.lp-footer-center {
  text-align: center;
}
.lp-footer-p1 {
  margin-inline: auto;
}
.lp-footer-p2 {
  margin-block-start: var(--kr-space-1);
  margin-inline: auto;
}