/* ==========================================================================================
   Knowledge Porridge design system (kp) v0.1
   One file: tokens, base, layout, components. Shared by knowledgeporridge.ai and
   howtoteachyourself.com. Design language modelled on Khan Academy (clarity, friendly flat
   colour, role cards, chips, FAQ) and workflows.io (display type, eyebrow pills, soft cards,
   accent arrow tiles, comparison table). Tokens are ours: re-brand by editing :root only.
   ========================================================================================== */

/* ---------- Font (Plus Jakarta Sans, SIL OFL 1.1, self-hosted) ---------- */
@font-face {
  font-family: "Plus Jakarta Sans";
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url("fonts/PlusJakartaSans-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url("fonts/PlusJakartaSans-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Plus Jakarta Sans";
  font-style: italic;
  font-weight: 200 800;
  font-display: swap;
  src: url("fonts/PlusJakartaSans-latin-italic.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+2000-206F, U+20AC, U+2122, U+2212;
}

/* ---------- Tokens ---------- */
:root {
  /* ink and surfaces */
  --kp-ink: #151521;
  --kp-ink-2: #464a55;
  --kp-ink-3: #6b6f7a;
  --kp-line: #e3e5ea;
  --kp-line-strong: #c9ccd3;
  --kp-bg: #ffffff;
  --kp-bg-soft: #f4f5f7;
  --kp-bg-tint: #eef1fd;
  --kp-bg-dark: #0d0e14;
  --kp-bg-navy: #0f1a3a;
  --kp-on-dark: #ffffff;
  --kp-on-dark-2: rgba(255, 255, 255, 0.72);

  /* brand */
  --kp-primary: #5650f5;
  --kp-primary-hover: #4039dc;
  --kp-primary-ink: #ffffff;
  --kp-primary-soft: #eceefe;
  --kp-accent: #dcf83c;
  --kp-accent-hover: #cdea1f;
  --kp-accent-ink: #0c0d0e;

  /* illustration and category palette */
  --kp-yellow: #fbc540;
  --kp-green: #72bf82;
  --kp-orange: #fb7c4f;
  --kp-pink: #f5a3cf;
  --kp-sky: #a8d5fa;
  --kp-blue: #7d93ff;
  --kp-oat: #f3e3c3;
  --kp-brown: #8a5a2b;

  /* feedback and map states */
  --kp-good: #1f8a46;
  --kp-good-soft: #e7f6ec;
  --kp-warn: #b86a00;
  --kp-warn-soft: #fff3de;
  --kp-bad: #cf2d20;
  --kp-bad-soft: #fdecea;
  --kp-violet: #7e3aa8;
  --kp-violet-soft: #f4ebfb;

  /* type */
  --kp-font: "Plus Jakarta Sans", "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --kp-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --kp-fs-xs: 0.75rem;
  --kp-fs-sm: 0.875rem;
  --kp-fs-md: 1rem;
  --kp-fs-lg: 1.125rem;
  --kp-fs-xl: 1.375rem;
  --kp-fs-2xl: clamp(1.5rem, 1.2rem + 1vw, 1.875rem);
  --kp-fs-3xl: clamp(1.875rem, 1.4rem + 1.8vw, 2.625rem);
  --kp-fs-display: clamp(2.375rem, 1.5rem + 3.6vw, 4rem);
  --kp-lh-tight: 1.1;
  --kp-lh-snug: 1.3;
  --kp-lh-body: 1.6;

  /* space: 4px grid */
  --kp-s1: 0.25rem;
  --kp-s2: 0.5rem;
  --kp-s3: 0.75rem;
  --kp-s4: 1rem;
  --kp-s5: 1.25rem;
  --kp-s6: 1.5rem;
  --kp-s8: 2rem;
  --kp-s10: 2.5rem;
  --kp-s12: 3rem;
  --kp-s16: 4rem;
  --kp-s20: 5rem;
  --kp-s24: 6rem;

  /* shape and depth */
  --kp-r-sm: 8px;
  --kp-r-md: 12px;
  --kp-r-lg: 16px;
  --kp-r-xl: 24px;
  --kp-r-pill: 999px;
  --kp-shadow-1: 0 2px 2px rgba(37, 35, 104, 0.16);
  --kp-shadow-2: 0 1px 2px rgba(16, 24, 40, 0.06), 0 8px 24px rgba(16, 24, 40, 0.06);
  --kp-shadow-3: 0 2px 4px rgba(16, 24, 40, 0.06), 0 24px 56px rgba(16, 24, 40, 0.12);
  --kp-focus: 0 0 0 3px rgba(86, 80, 245, 0.35);

  --kp-container: 1140px;
  --kp-container-narrow: 720px;
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--kp-font);
  font-size: var(--kp-fs-md);
  line-height: var(--kp-lh-body);
  color: var(--kp-ink);
  background: var(--kp-bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01" on;
}
img,
svg {
  max-width: 100%;
  height: auto;
}
h1,
h2,
h3,
h4 {
  margin: 0 0 var(--kp-s4);
  font-weight: 700;
  line-height: var(--kp-lh-snug);
  letter-spacing: -0.015em;
}
h1 {
  font-size: var(--kp-fs-3xl);
  line-height: var(--kp-lh-tight);
}
h2 {
  font-size: var(--kp-fs-2xl);
}
h3 {
  font-size: var(--kp-fs-xl);
}
h4 {
  font-size: var(--kp-fs-lg);
}
p {
  margin: 0 0 var(--kp-s4);
}
a {
  color: var(--kp-primary);
  text-underline-offset: 3px;
}
a:hover {
  color: var(--kp-primary-hover);
}
:focus-visible {
  outline: none;
  box-shadow: var(--kp-focus);
  border-radius: var(--kp-r-sm);
}
::selection {
  background: var(--kp-accent);
  color: var(--kp-accent-ink);
}
code {
  font-family: var(--kp-font-mono);
  font-size: 0.9em;
  background: var(--kp-bg-soft);
  border: 1px solid var(--kp-line);
  border-radius: 6px;
  padding: 1px 6px;
  word-break: break-all;
}
hr {
  border: 0;
  border-top: 1px solid var(--kp-line);
  margin: var(--kp-s8) 0;
}
.kp-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.kp-skip {
  position: absolute;
  left: var(--kp-s4);
  top: -48px;
  background: var(--kp-ink);
  color: var(--kp-on-dark);
  padding: var(--kp-s2) var(--kp-s4);
  border-radius: var(--kp-r-sm);
  z-index: 100;
}
.kp-skip:focus {
  top: var(--kp-s4);
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Text utilities ---------- */
.kp-muted {
  color: var(--kp-ink-3);
}
.kp-small {
  font-size: var(--kp-fs-sm);
}
.kp-error {
  color: var(--kp-bad);
}
.kp-center {
  text-align: center;
}
.kp-display {
  font-size: var(--kp-fs-display);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.kp-display em,
h1 em,
h2 em {
  font-style: italic;
  font-weight: 800;
}
.kp-lead {
  font-size: var(--kp-fs-lg);
  color: var(--kp-ink-2);
  max-width: 38rem;
}
.kp-kicker {
  font-size: var(--kp-fs-sm);
  font-weight: 700;
  margin-bottom: var(--kp-s2);
}
.kp-mark {
  background: linear-gradient(transparent 58%, var(--kp-accent) 58%);
  padding: 0 2px;
}

/* ---------- Layout ---------- */
.kp-container {
  width: min(100% - 2.5rem, var(--kp-container));
  margin-inline: auto;
}
.kp-container--narrow {
  width: min(100% - 2.5rem, var(--kp-container-narrow));
  margin-inline: auto;
}
.kp-section {
  padding-block: clamp(var(--kp-s12), 6vw, var(--kp-s24));
}
.kp-section--tight {
  padding-block: var(--kp-s12);
}
.kp-section--soft {
  background: var(--kp-bg-soft);
}
.kp-section--tint {
  background: var(--kp-bg-tint);
}
.kp-section--dark {
  background: var(--kp-bg-dark);
  color: var(--kp-on-dark);
}
.kp-section--dark .kp-lead,
.kp-section--dark .kp-muted {
  color: var(--kp-on-dark-2);
}
.kp-section__head {
  max-width: 44rem;
  margin: 0 auto var(--kp-s10);
  text-align: center;
}
.kp-section__head .kp-lead {
  margin-inline: auto;
}
.kp-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--kp-s8), 5vw, var(--kp-s16));
  align-items: center;
}
.kp-split--reverse > :first-child {
  order: 2;
}
.kp-split--top {
  align-items: start;
}
.kp-grid-2,
.kp-grid-3,
.kp-grid-4 {
  display: grid;
  gap: var(--kp-s5);
}
.kp-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}
.kp-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.kp-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.kp-stack > * + * {
  margin-top: var(--kp-s4);
}
.kp-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kp-s3);
  align-items: center;
}
@media (max-width: 900px) {
  .kp-split,
  .kp-grid-3,
  .kp-grid-4 {
    grid-template-columns: 1fr;
  }
  .kp-split--reverse > :first-child {
    order: 0;
  }
  .kp-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .kp-grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ---------- Announcement bar ---------- */
.kp-announce {
  margin: var(--kp-s2);
  padding: var(--kp-s2) var(--kp-s4);
  background: var(--kp-bg-tint);
  border-radius: var(--kp-r-sm);
  font-size: var(--kp-fs-sm);
  display: flex;
  gap: var(--kp-s2);
  align-items: center;
}
.kp-announce__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--kp-primary);
  flex: none;
}

/* ---------- Header and navigation ---------- */
.kp-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--kp-line);
}
.kp-header__inner {
  display: flex;
  align-items: center;
  gap: var(--kp-s6);
  min-height: 64px;
}
.kp-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s2);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--kp-ink);
  text-decoration: none;
  font-size: var(--kp-fs-lg);
}
.kp-logo:hover {
  color: var(--kp-ink);
}
.kp-logo svg {
  width: 28px;
  height: 28px;
}
.kp-nav {
  display: flex;
  gap: var(--kp-s1);
  margin-left: auto;
}
.kp-nav a {
  color: var(--kp-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--kp-fs-sm);
  padding: var(--kp-s2) var(--kp-s3);
  border-radius: var(--kp-r-sm);
}
.kp-nav a:hover,
.kp-nav a[aria-current="page"] {
  background: var(--kp-bg-soft);
}
.kp-nav a.is-active {
  background: var(--kp-ink);
  color: var(--kp-on-dark);
}
.kp-header__actions {
  display: flex;
  gap: var(--kp-s2);
  align-items: center;
}
.kp-menu {
  display: none;
  margin-left: auto;
}
.kp-menu > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--kp-s2) var(--kp-s3);
  border: 1px solid var(--kp-line);
  border-radius: var(--kp-r-sm);
  font-weight: 700;
  font-size: var(--kp-fs-sm);
}
.kp-menu > summary::-webkit-details-marker {
  display: none;
}
.kp-menu__panel {
  position: absolute;
  left: 0;
  right: 0;
  top: 64px;
  background: var(--kp-bg);
  border-bottom: 1px solid var(--kp-line);
  padding: var(--kp-s4) var(--kp-s5) var(--kp-s6);
  display: grid;
  gap: var(--kp-s2);
  box-shadow: var(--kp-shadow-2);
}
.kp-menu__panel a {
  color: var(--kp-ink);
  font-weight: 600;
  text-decoration: none;
  padding: var(--kp-s2) 0;
}
@media (max-width: 860px) {
  .kp-nav,
  .kp-header__actions--wide {
    display: none;
  }
  .kp-menu {
    display: block;
  }
}

/* ---------- Buttons and links ---------- */
.kp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--kp-s2);
  min-height: 40px;
  padding: 0 var(--kp-s4);
  font: inherit;
  font-size: var(--kp-fs-sm);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--kp-r-sm);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}
.kp-btn:disabled {
  opacity: 0.5;
  cursor: default;
}
.kp-btn--primary {
  background: var(--kp-primary);
  color: var(--kp-primary-ink);
}
.kp-btn--primary:hover {
  background: var(--kp-primary-hover);
  color: var(--kp-primary-ink);
}
.kp-btn--secondary {
  background: var(--kp-primary-soft);
  color: var(--kp-primary);
  border-color: #d9dcfb;
}
.kp-btn--secondary:hover {
  background: #e0e3fd;
  color: var(--kp-primary-hover);
}
.kp-btn--ghost {
  background: transparent;
  color: var(--kp-ink);
  border-color: var(--kp-line);
}
.kp-btn--ghost:hover {
  background: var(--kp-bg-soft);
  color: var(--kp-ink);
}
.kp-btn--dark {
  background: var(--kp-ink);
  color: var(--kp-on-dark);
}
.kp-btn--dark:hover {
  background: #2a2a3a;
  color: var(--kp-on-dark);
}
.kp-btn--accent {
  background: var(--kp-accent);
  color: var(--kp-accent-ink);
}
.kp-btn--accent:hover {
  background: var(--kp-accent-hover);
  color: var(--kp-accent-ink);
}
.kp-btn--danger {
  background: var(--kp-bad);
  color: #fff;
}
.kp-btn--lg {
  min-height: 48px;
  padding: 0 var(--kp-s6);
  font-size: var(--kp-fs-md);
}
.kp-btn--sm {
  min-height: 32px;
  padding: 0 var(--kp-s3);
  font-size: var(--kp-fs-xs);
}
.kp-btn--block {
  width: 100%;
}

/* workflows-style arrow tile, used inside or next to links */
.kp-arrow {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--kp-accent);
  color: var(--kp-accent-ink);
  flex: none;
}
.kp-arrow svg {
  width: 14px;
  height: 14px;
}
.kp-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s3);
  font-weight: 700;
  color: var(--kp-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}
.kp-link-arrow:hover {
  color: var(--kp-ink);
  text-decoration-thickness: 2px;
}
.kp-section--dark .kp-link-arrow {
  color: var(--kp-on-dark);
}

/* ---------- Eyebrow pill ---------- */
.kp-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s2);
  padding: 5px 12px 5px 6px;
  border-radius: var(--kp-r-pill);
  background: var(--kp-bg);
  box-shadow: var(--kp-shadow-2);
  font-size: var(--kp-fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--kp-ink-2);
  margin-bottom: var(--kp-s5);
}
.kp-eyebrow::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--kp-ink) radial-gradient(circle, var(--kp-accent) 0 3px, transparent 4px);
}
.kp-section--dark .kp-eyebrow {
  background: rgba(255, 255, 255, 0.06);
  color: var(--kp-on-dark-2);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
}

/* ---------- Hero ---------- */
.kp-hero {
  padding-block: clamp(var(--kp-s12), 7vw, var(--kp-s20));
  position: relative;
  overflow: hidden;
}
.kp-hero--soft {
  background: radial-gradient(120% 90% at 50% -20%, #ffffff 0%, var(--kp-bg-soft) 60%);
}
.kp-hero .kp-display {
  margin-bottom: var(--kp-s5);
}
.kp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kp-s4);
  align-items: center;
  margin-top: var(--kp-s6);
}

/* ---------- Role cards (Khan "Get started") ---------- */
.kp-roles {
  display: grid;
  gap: var(--kp-s3);
}
.kp-role {
  display: flex;
  align-items: center;
  gap: var(--kp-s4);
  padding: var(--kp-s4) var(--kp-s5);
  border: 1px solid var(--kp-line);
  border-radius: var(--kp-r-sm);
  background: var(--kp-bg);
  box-shadow: var(--kp-shadow-1);
  color: var(--kp-ink);
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.kp-role:hover {
  border-color: var(--kp-primary);
  color: var(--kp-ink);
  transform: translateY(-1px);
}
.kp-role__title {
  font-weight: 700;
  display: block;
}
.kp-role__desc {
  font-size: var(--kp-fs-sm);
  color: var(--kp-ink-3);
}
.kp-role::after {
  content: "›";
  margin-left: auto;
  font-size: 1.4rem;
  color: var(--kp-primary);
}
.kp-role[aria-disabled="true"] {
  opacity: 0.6;
  pointer-events: none;
}

/* ---------- Stats band ---------- */
.kp-stats {
  background: var(--kp-bg-soft);
  border-block: 1px solid var(--kp-line);
}
.kp-stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--kp-s4);
  padding-block: var(--kp-s8);
  text-align: center;
}
.kp-stat__value {
  display: block;
  font-size: var(--kp-fs-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.kp-stat__label {
  font-size: var(--kp-fs-sm);
  color: var(--kp-ink-2);
}
@media (max-width: 700px) {
  .kp-stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Chips (Khan course chips) ---------- */
.kp-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--kp-s3);
}
.kp-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s2);
  padding: var(--kp-s3) var(--kp-s5) var(--kp-s3) var(--kp-s4);
  border: 1px solid var(--kp-line-strong);
  border-radius: var(--kp-r-pill);
  background: var(--kp-bg);
  color: var(--kp-ink);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--kp-fs-sm);
}
a.kp-chip:hover {
  border-color: var(--kp-primary);
  color: var(--kp-ink);
}
.kp-chip__icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  flex: none;
  background: var(--kp-primary);
}
.kp-chip__icon--yellow {
  background: var(--kp-yellow);
}
.kp-chip__icon--green {
  background: var(--kp-green);
}
.kp-chip__icon--orange {
  background: var(--kp-orange);
}
.kp-chip__icon--pink {
  background: var(--kp-pink);
}
.kp-chip__icon--sky {
  background: var(--kp-sky);
}
.kp-chip__tag {
  font-size: var(--kp-fs-xs);
  color: var(--kp-ink-3);
  font-weight: 600;
}

/* ---------- Badges (small status pills) ---------- */
.kp-badge {
  display: inline-block;
  font-size: var(--kp-fs-xs);
  font-weight: 700;
  padding: 2px 9px;
  border-radius: var(--kp-r-pill);
  background: var(--kp-bg-soft);
  color: var(--kp-ink-2);
  margin-right: var(--kp-s1);
  white-space: nowrap;
}
.kp-badge--good,
.kp-badge--known,
.kp-badge--mastered {
  background: var(--kp-good-soft);
  color: var(--kp-good);
}
.kp-badge--bad,
.kp-badge--gap,
.kp-badge--hole {
  background: var(--kp-bad-soft);
  color: var(--kp-bad);
}
.kp-badge--warn,
.kp-badge--frontier {
  background: var(--kp-warn-soft);
  color: var(--kp-warn);
}
.kp-badge--violet,
.kp-badge--vocabulary,
.kp-badge--suspect {
  background: var(--kp-violet-soft);
  color: var(--kp-violet);
}
.kp-badge--primary {
  background: var(--kp-primary-soft);
  color: var(--kp-primary);
}

/* ---------- Checklist ---------- */
.kp-checklist {
  list-style: none;
  padding: 0;
  margin: var(--kp-s5) 0;
  display: grid;
  gap: var(--kp-s3);
}
.kp-checklist li {
  display: flex;
  gap: var(--kp-s3);
  align-items: flex-start;
}
.kp-checklist li::before {
  content: "";
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--kp-green) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat;
}

/* ---------- Illustration frame ---------- */
.kp-illus {
  margin: 0;
  display: grid;
  place-items: center;
}
.kp-illus svg,
.kp-illus img {
  width: 100%;
  max-width: 520px;
  height: auto;
}

/* ---------- Cards ---------- */
.kp-card {
  background: var(--kp-bg);
  border: 1px solid var(--kp-line);
  border-radius: var(--kp-r-lg);
  padding: var(--kp-s6);
  box-shadow: var(--kp-shadow-2);
}
.kp-card--flat {
  box-shadow: none;
}
.kp-card--soft {
  background: var(--kp-bg-soft);
  border-color: transparent;
  box-shadow: none;
}
.kp-card > :last-child {
  margin-bottom: 0;
}
.kp-card__title {
  font-size: var(--kp-fs-lg);
  margin-bottom: var(--kp-s2);
}
.kp-tile {
  background: var(--kp-bg-soft);
  border-radius: var(--kp-r-md);
  padding: var(--kp-s4);
}
.kp-tile__value {
  font-size: var(--kp-fs-xl);
  font-weight: 800;
  display: block;
}

/* ---------- Tabs (CSS only: radio inputs, all content in the HTML for SEO) ---------- */
.kp-tabs > input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.kp-tabs__list {
  display: flex;
  gap: var(--kp-s6);
  border-bottom: 1px solid var(--kp-line-strong);
  margin-bottom: var(--kp-s8);
}
.kp-tabs__list label {
  padding: var(--kp-s2) 2px var(--kp-s3);
  font-weight: 600;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
}
.kp-tabs__panel {
  display: none;
}
.kp-tabs > input:nth-of-type(1):checked ~ .kp-tabs__list label:nth-of-type(1),
.kp-tabs > input:nth-of-type(2):checked ~ .kp-tabs__list label:nth-of-type(2),
.kp-tabs > input:nth-of-type(3):checked ~ .kp-tabs__list label:nth-of-type(3) {
  border-color: var(--kp-primary);
  color: var(--kp-primary);
}
/* Panels carry explicit numbers: nth-of-type would also count the tab list's own div. */
.kp-tabs > input:nth-of-type(1):checked ~ .kp-tabs__panel--1,
.kp-tabs > input:nth-of-type(2):checked ~ .kp-tabs__panel--2,
.kp-tabs > input:nth-of-type(3):checked ~ .kp-tabs__panel--3 {
  display: block;
}
.kp-tabs > input:focus-visible ~ .kp-tabs__list {
  box-shadow: var(--kp-focus);
}

/* ---------- Quote / principle cards (Khan testimonial blocks) ---------- */
.kp-quote {
  border-radius: var(--kp-r-lg);
  padding: var(--kp-s6);
  display: flex;
  flex-direction: column;
  gap: var(--kp-s3);
  min-height: 260px;
  margin: 0;
}
.kp-quote__who {
  font-size: var(--kp-fs-xs);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.kp-quote blockquote,
.kp-quote__text {
  margin: 0;
  font-size: var(--kp-fs-lg);
  font-weight: 700;
  line-height: 1.35;
}
.kp-quote figcaption,
.kp-quote__cite {
  margin-top: auto;
  font-style: italic;
  font-size: var(--kp-fs-sm);
}
.kp-quote a {
  color: inherit;
}
.kp-quote--yellow {
  background: var(--kp-yellow);
}
.kp-quote--green {
  background: var(--kp-green);
}
.kp-quote--orange {
  background: var(--kp-orange);
}
.kp-quote--sky {
  background: var(--kp-sky);
}
.kp-quote--pink {
  background: var(--kp-pink);
}

/* ---------- Dark panel (Khan mission block) ---------- */
.kp-panel-dark {
  background: var(--kp-ink);
  color: var(--kp-on-dark);
  border-radius: var(--kp-r-md);
  padding: clamp(var(--kp-s6), 4vw, var(--kp-s10));
  display: flex;
  gap: var(--kp-s8);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.kp-panel-dark p {
  color: var(--kp-on-dark-2);
  max-width: 34rem;
}
.kp-panel-dark h2,
.kp-panel-dark h3 {
  color: var(--kp-on-dark);
}

/* ---------- FAQ accordion (details/summary; pair with FAQPage JSON-LD) ---------- */
.kp-faq {
  border-top: 1px solid var(--kp-line-strong);
}
.kp-faq details {
  border-bottom: 1px solid var(--kp-line-strong);
}
.kp-faq summary {
  list-style: none;
  cursor: pointer;
  padding: var(--kp-s5) var(--kp-s3);
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  gap: var(--kp-s4);
}
.kp-faq summary::-webkit-details-marker {
  display: none;
}
.kp-faq summary::after {
  content: "";
  width: 10px;
  height: 10px;
  flex: none;
  margin-top: 6px;
  border-right: 2px solid var(--kp-ink-2);
  border-bottom: 2px solid var(--kp-ink-2);
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}
.kp-faq details[open] summary::after {
  transform: rotate(-135deg);
}
.kp-faq details > div {
  padding: 0 var(--kp-s3) var(--kp-s5);
  color: var(--kp-ink-2);
}

/* ---------- Comparison table (workflows "why us") ---------- */
.kp-compare-wrap {
  overflow-x: auto;
}
.kp-compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  min-width: 640px;
  font-size: var(--kp-fs-sm);
}
.kp-compare th,
.kp-compare td {
  padding: var(--kp-s4);
  text-align: center;
  border-bottom: 1px solid var(--kp-line);
}
.kp-compare th:first-child,
.kp-compare td:first-child {
  text-align: left;
  font-weight: 600;
}
.kp-compare thead th {
  font-weight: 700;
}
.kp-compare .is-us {
  background: var(--kp-bg);
  box-shadow: inset 1px 0 0 var(--kp-line-strong), inset -1px 0 0 var(--kp-line-strong);
}
.kp-compare thead .is-us {
  border-radius: var(--kp-r-md) var(--kp-r-md) 0 0;
  box-shadow: inset 1px 1px 0 var(--kp-line-strong), inset -1px 0 0 var(--kp-line-strong);
}
.kp-yes,
.kp-no {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 0;
}
.kp-yes {
  background: var(--kp-ink) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 14px no-repeat;
}
.kp-no {
  background: var(--kp-line-strong) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5 5l6 6M11 5l-6 6' fill='none' stroke='white' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center / 12px no-repeat;
}

/* ---------- Wordmark grid (workflows logo grid, text only) ---------- */
.kp-wordmarks {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--kp-s4);
}
.kp-wordmark {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s2);
  padding: var(--kp-s3) var(--kp-s5);
  background: var(--kp-bg);
  border-radius: var(--kp-r-md);
  box-shadow: var(--kp-shadow-2);
  font-weight: 700;
}
.kp-wordmark::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--kp-good);
}

/* ---------- Steps ---------- */
.kp-steps {
  counter-reset: kp-step;
  list-style: none;
  padding: 0;
  margin: var(--kp-s6) 0;
  display: grid;
  gap: var(--kp-s5);
}
.kp-steps li {
  counter-increment: kp-step;
  position: relative;
  padding-left: 52px;
  min-height: 36px;
}
.kp-steps li::before {
  content: counter(kp-step);
  position: absolute;
  left: 0;
  top: -2px;
  width: 36px;
  height: 36px;
  border-radius: var(--kp-r-sm);
  background: var(--kp-primary-soft);
  color: var(--kp-primary);
  display: grid;
  place-items: center;
  font-weight: 800;
}
.kp-steps strong {
  display: block;
}

/* ---------- CTA band ---------- */
.kp-cta {
  text-align: center;
  background: var(--kp-bg-dark);
  color: var(--kp-on-dark);
  padding-block: clamp(var(--kp-s12), 7vw, var(--kp-s20)) 0;
  overflow: hidden;
}
.kp-cta p {
  color: var(--kp-on-dark-2);
}
.kp-cta .kp-illus {
  margin-top: var(--kp-s10);
}

/* ---------- Footer ---------- */
.kp-footer {
  background: var(--kp-bg-dark);
  color: var(--kp-on-dark-2);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: var(--kp-s12) var(--kp-s8);
  font-size: var(--kp-fs-sm);
}
.kp-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 1.4fr;
  gap: var(--kp-s8);
}
.kp-footer h2 {
  font-size: var(--kp-fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--kp-on-dark-2);
  margin-bottom: var(--kp-s3);
}
.kp-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--kp-s2);
}
.kp-footer a {
  color: var(--kp-on-dark);
  text-decoration: none;
  font-weight: 600;
}
.kp-footer a:hover {
  text-decoration: underline;
  color: var(--kp-on-dark);
}
.kp-footer .kp-logo {
  color: var(--kp-on-dark);
}
.kp-footer__bottom {
  margin-top: var(--kp-s10);
  padding-top: var(--kp-s5);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  gap: var(--kp-s5);
  justify-content: space-between;
}
@media (max-width: 800px) {
  .kp-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- Forms ---------- */
.kp-field {
  display: grid;
  gap: var(--kp-s1);
  margin-bottom: var(--kp-s4);
}
.kp-label {
  font-weight: 700;
  font-size: var(--kp-fs-sm);
}
.kp-input,
.kp-select,
.kp-textarea {
  font: inherit;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--kp-line-strong);
  border-radius: var(--kp-r-sm);
  background: var(--kp-bg);
  color: var(--kp-ink);
}
.kp-input:focus,
.kp-select:focus,
.kp-textarea:focus {
  outline: none;
  border-color: var(--kp-primary);
  box-shadow: var(--kp-focus);
}
.kp-textarea {
  min-height: 120px;
  resize: vertical;
}
/* workflows-style inline capture form: fields and button in one shell */
.kp-inline-form {
  display: flex;
  gap: var(--kp-s2);
  padding: var(--kp-s2);
  background: var(--kp-bg);
  border-radius: var(--kp-r-md);
  box-shadow: var(--kp-shadow-3);
  max-width: 460px;
}
.kp-inline-form .kp-input {
  border: 0;
  box-shadow: none;
}
.kp-alert {
  padding: var(--kp-s3) var(--kp-s4);
  border-radius: var(--kp-r-sm);
  background: var(--kp-bad-soft);
  color: var(--kp-bad);
  font-weight: 600;
}
.kp-alert--info {
  background: var(--kp-bg-tint);
  color: var(--kp-ink-2);
}

/* ---------- Quiz options and progress (learning UI) ---------- */
.kp-options {
  display: grid;
  gap: var(--kp-s2);
  margin: var(--kp-s4) 0;
}
.kp-option {
  display: flex;
  gap: var(--kp-s3);
  align-items: flex-start;
  padding: var(--kp-s3) var(--kp-s4);
  border: 1px solid var(--kp-line-strong);
  border-radius: var(--kp-r-sm);
  cursor: pointer;
  font-weight: 500;
  background: var(--kp-bg);
}
.kp-option:hover {
  border-color: var(--kp-primary);
}
.kp-option input {
  margin-top: 5px;
  accent-color: var(--kp-primary);
}
.kp-option.is-right {
  border-color: var(--kp-good);
  background: var(--kp-good-soft);
}
.kp-option.is-wrong {
  border-color: var(--kp-bad);
  background: var(--kp-bad-soft);
}
.kp-progress {
  height: 8px;
  border-radius: var(--kp-r-pill);
  background: var(--kp-bg-soft);
  overflow: hidden;
}
.kp-progress > span {
  display: block;
  height: 100%;
  background: var(--kp-primary);
  border-radius: inherit;
}

/* ---------- Product mock (HTML stand-in for a screenshot) ---------- */
.kp-mock {
  border-radius: var(--kp-r-xl);
  padding: var(--kp-s6);
  background: var(--kp-yellow);
}
.kp-mock--sky {
  background: var(--kp-sky);
}
.kp-mock--green {
  background: var(--kp-green);
}
.kp-mock__screen {
  background: var(--kp-bg);
  border-radius: var(--kp-r-md);
  box-shadow: var(--kp-shadow-3);
  padding: var(--kp-s5);
  font-size: var(--kp-fs-sm);
}
.kp-mock__bar {
  display: flex;
  gap: 6px;
  margin-bottom: var(--kp-s4);
}
.kp-mock__bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--kp-line-strong);
}

/* ---------- Article (howtoteachyourself.com) ---------- */
.kp-breadcrumbs {
  font-size: var(--kp-fs-sm);
  color: var(--kp-ink-3);
  margin-bottom: var(--kp-s5);
}
.kp-breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--kp-s2);
}
.kp-breadcrumbs li + li::before {
  content: "/";
  margin-right: var(--kp-s2);
  color: var(--kp-line-strong);
}
.kp-breadcrumbs a {
  color: var(--kp-ink-3);
}
.kp-prose {
  font-size: 1.0625rem;
  line-height: 1.75;
}
.kp-prose h2 {
  margin-top: var(--kp-s10);
}
.kp-prose ul,
.kp-prose ol {
  padding-left: 1.3em;
}
.kp-prose li {
  margin-bottom: var(--kp-s2);
}
.kp-prose li::marker {
  color: var(--kp-primary);
  font-weight: 700;
}
.kp-sources {
  font-size: var(--kp-fs-sm);
  color: var(--kp-ink-2);
}
.kp-cta-card {
  margin-top: var(--kp-s12);
  border-radius: var(--kp-r-lg);
  padding: var(--kp-s6);
  background: var(--kp-bg-tint);
  display: flex;
  gap: var(--kp-s5);
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.kp-cta-card p {
  margin: 0;
  max-width: 34rem;
}
.kp-card-link {
  display: block;
  text-decoration: none;
  color: var(--kp-ink);
  height: 100%;
}
.kp-card-link:hover {
  color: var(--kp-ink);
}
.kp-card-link:hover .kp-card {
  border-color: var(--kp-primary);
}
.kp-card-link .kp-card {
  height: 100%;
  transition: border-color 0.15s ease;
}

/* ---------- Design-system page helpers ---------- */
.kp-swatch {
  border-radius: var(--kp-r-md);
  border: 1px solid var(--kp-line);
  overflow: hidden;
  font-size: var(--kp-fs-xs);
}
.kp-swatch > span {
  display: block;
  height: 64px;
}
.kp-swatch > div {
  padding: var(--kp-s2) var(--kp-s3);
}
.kp-sw-ink { background: var(--kp-ink); }
.kp-sw-primary { background: var(--kp-primary); }
.kp-sw-primary-soft { background: var(--kp-primary-soft); }
.kp-sw-accent { background: var(--kp-accent); }
.kp-sw-soft { background: var(--kp-bg-soft); }
.kp-sw-tint { background: var(--kp-bg-tint); }
.kp-sw-dark { background: var(--kp-bg-dark); }
.kp-sw-yellow { background: var(--kp-yellow); }
.kp-sw-green { background: var(--kp-green); }
.kp-sw-orange { background: var(--kp-orange); }
.kp-sw-pink { background: var(--kp-pink); }
.kp-sw-sky { background: var(--kp-sky); }
.kp-sw-good { background: var(--kp-good); }
.kp-sw-warn { background: var(--kp-warn); }
.kp-sw-bad { background: var(--kp-bad); }
.kp-sw-violet { background: var(--kp-violet); }

/* ---------- Width steps for static progress bars (no inline styles under our CSP) ---------- */
.kp-progress--0 { width: 0%; }
.kp-progress--5 { width: 5%; }
.kp-progress--10 { width: 10%; }
.kp-progress--15 { width: 15%; }
.kp-progress--20 { width: 20%; }
.kp-progress--25 { width: 25%; }
.kp-progress--30 { width: 30%; }
.kp-progress--35 { width: 35%; }
.kp-progress--40 { width: 40%; }
.kp-progress--45 { width: 45%; }
.kp-progress--50 { width: 50%; }
.kp-progress--55 { width: 55%; }
.kp-progress--60 { width: 60%; }
.kp-progress--65 { width: 65%; }
.kp-progress--70 { width: 70%; }
.kp-progress--75 { width: 75%; }
.kp-progress--80 { width: 80%; }
.kp-progress--85 { width: 85%; }
.kp-progress--90 { width: 90%; }
.kp-progress--95 { width: 95%; }
.kp-progress--100 { width: 100%; }

/* ---------- App layout (knowledgeporridge.ai/app) ---------- */
.kp-app .kp-nav--app {
  margin-left: auto;
}
.kp-map {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) 360px;
  gap: var(--kp-s6);
  align-items: start;
}
.kp-map__chart svg {
  width: 100%;
  height: auto;
}
.kp-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--kp-s2) var(--kp-s4);
  font-size: var(--kp-fs-sm);
  color: var(--kp-ink-2);
  margin-bottom: var(--kp-s5);
}
.kp-legend span {
  display: inline-flex;
  align-items: center;
  gap: var(--kp-s2);
}
.kp-legend i {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}
.kp-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.kp-list > li {
  padding: var(--kp-s3) 0;
  border-bottom: 1px solid var(--kp-line);
}
.kp-list > li:last-child {
  border-bottom: 0;
}
.kp-stat {
  font-size: var(--kp-fs-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
}
@media (max-width: 900px) {
  .kp-map {
    grid-template-columns: 1fr;
  }
  .kp-app .kp-nav--app {
    display: flex;
    overflow-x: auto;
  }
}
.kp-app #view > h2 {
  margin-top: var(--kp-s10);
}

/* ---------- MCP-first pieces ---------- */
.kp-copy {
  max-width: 560px;
  margin-inline: auto;
}
.kp-copy .kp-input {
  font-family: var(--kp-font-mono);
  font-size: var(--kp-fs-sm);
}
.kp-copy [data-copied] {
  background: var(--kp-good);
}
.kp-hero .kp-copy {
  margin-inline: 0;
  margin-bottom: var(--kp-s5);
}
.kp-roles--spaced {
  margin-bottom: var(--kp-s4);
}
.kp-card--on-dark {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
  color: var(--kp-on-dark);
}
.kp-card--on-dark p {
  color: var(--kp-on-dark-2);
}
.kp-section__foot {
  margin-top: var(--kp-s10);
}
.kp-compare--left td {
  text-align: left;
}
.kp-compare--left {
  min-width: 520px;
}
.kp-prose pre {
  background: var(--kp-bg-dark);
  color: var(--kp-on-dark);
  border-radius: var(--kp-r-md);
  padding: var(--kp-s4) var(--kp-s5);
  overflow-x: auto;
  font-size: var(--kp-fs-sm);
}
.kp-prose pre code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  word-break: normal;
}
.kp-connect-card {
  border: 2px solid var(--kp-primary);
  margin-bottom: var(--kp-s8);
}
.kp-connect-card .kp-copy {
  margin-inline: 0;
  margin-block: var(--kp-s4);
}
.kp-footer__legal {
  margin: var(--kp-s4) 0 0;
  font-size: var(--kp-fs-xs);
  color: var(--kp-on-dark-2);
}

/* ---------- Sign-in: Google button + "or" divider ---------- */
.kp-btn--google {
  background: var(--kp-bg);
  gap: var(--kp-s3);
}
.kp-btn__icon {
  flex: none;
}
.kp-divider {
  display: flex;
  align-items: center;
  gap: var(--kp-s3);
  margin: var(--kp-s4) 0;
  color: var(--kp-ink-3);
  font-size: var(--kp-fs-sm);
}
.kp-divider::before,
.kp-divider::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--kp-line);
}