/* =========================================================
   cc-habits - palette themes
   The body's [data-palette] attr selects the active palette.
   ========================================================= */
:root,
body[data-palette="acid"] {
  /* Acid lime (default - Cipher vibe) */
  --bg:                #B5FF1C;
  --bg-dark:           #102600;
  --ink:               #102600;
  --ink-on-dark:       #B5FF1C;
  --ink-muted:         #1F4A04;
  --ink-dim:           #4A7A0A;
  --ink-muted-on-dark: #9BE060;
  --ink-dim-on-dark:   #4A7A0A;
  --rule:              #102600;
  --rule-on-dark:      #1F4A04;
  --accent:            #00B7FF;
  --signal-pos:        #1F4A04;
  --signal-neg:        #FF2D6F;
  --learning:          #A855F7;
}
body[data-palette="crt"] {
  /* Phosphor terminal - all dark, phosphor green ink */
  --bg:                #0A1208;
  --bg-dark:           #050805;
  --ink:               #5BFF8C;
  --ink-on-dark:       #5BFF8C;
  --ink-muted:         #3FB763;
  --ink-dim:           #1F6A33;
  --ink-muted-on-dark: #3FB763;
  --ink-dim-on-dark:   #1F6A33;
  --rule:              #1F6A33;
  --rule-on-dark:      #1F6A33;
  --accent:            #FF9E2C;
  --signal-pos:        #5BFF8C;
  --signal-neg:        #FF4D6F;
  --learning:          #A855F7;
}
body[data-palette="paper"] {
  /* Editorial print - cream / deep ink */
  --bg:                #F4EFE3;
  --bg-dark:           #15130E;
  --ink:               #15130E;
  --ink-on-dark:       #F4EFE3;
  --ink-muted:         #4A4538;
  --ink-dim:           #8A8474;
  --ink-muted-on-dark: #D6D0BD;
  --ink-dim-on-dark:   #8A8474;
  --rule:              #15130E;
  --rule-on-dark:      #4A4538;
  --accent:            #C03A2B;
  --signal-pos:        #2D5A2D;
  --signal-neg:        #C03A2B;
  --learning:          #5F4B8B;
}

:root {
  /* Type (palette-independent) */
  --font-display:
    "Silkscreen", "Departure Mono", "DepartureMono", ui-monospace,
    "JetBrains Mono", monospace;
  --font-mono:
    "JetBrains Mono", "JetBrainsMono", ui-monospace, "Cascadia Code",
    monospace;
  --page-gutter: clamp(1rem, 4vw, 2rem);

  /* Easing */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.83, 0, 0.17, 1);
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color 320ms var(--ease-out), color 320ms var(--ease-out);
}
html { scroll-padding-top: 6.5rem; }
body { overflow-x: hidden; position: relative; }

/* Fixed full-viewport rain canvas (lives behind everything).
   Sections sit above it; dark sections opaquely hide it. */
.rain-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
main, footer, nav { position: relative; z-index: 1; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button {
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
}
img, svg, canvas { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--ink); color: var(--bg); }

/* =========================================================
   Type scale
   ========================================================= */
.t-display-1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.4vw, 4.5rem);
  line-height: 1.0;
  letter-spacing: 0;
  font-weight: 400;
  text-transform: lowercase;
}
.t-display-2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: 0;
  font-weight: 400;
  text-transform: lowercase;
}
.t-h1 {
  font-family: var(--font-display);
  font-size: 2.25rem;
  line-height: 1.05;
  font-weight: 400;
}
.t-h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.15;
  font-weight: 400;
}
.t-h3 {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1.3;
  font-weight: 500;
}
.t-body {
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.55;
  font-weight: 400;
}
.t-small {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  font-weight: 400;
}
.t-caption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

/* =========================================================
   Layout
   ========================================================= */
.container {
  width: min(1200px, 100%);
  padding-inline: var(--page-gutter);
  margin: 0 auto;
  box-sizing: border-box;
}
.section {
  position: relative;
  padding-block: 4rem;
}
@media (min-width: 768px) {
  .section { padding-block: 5.5rem; }
}
.section--lime {
  background: transparent;
  color: var(--ink);
}
.section--dark {
  background: var(--bg-dark);
  color: var(--ink-on-dark);
}
.section--dark .t-caption,
.section--dark .ink-dim { color: var(--ink-dim-on-dark); }

.hairline {
  border: 0;
  height: 0;
  border-block-start: 0.5px solid var(--rule);
  margin: 0;
}
.section--dark .hairline { border-block-start-color: var(--rule-on-dark); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 3rem;
}
@media (min-width: 768px) {
  .section-head { margin-bottom: 4rem; }
}

/* =========================================================
   Wordmark
   ========================================================= */
.wordmark {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  white-space: nowrap;
}
.wordmark-icon {
  display: inline-block;
  height: 1.8em;
  width: auto;
  flex-shrink: 0;
  vertical-align: middle;
}
.wordmark-icon--dark { display: none; }
.nav--scrolled .wordmark-icon--light { display: none; }
.nav--scrolled .wordmark-icon--dark  { display: inline-block; }
.footer        .wordmark-icon--light { display: none; }
.footer        .wordmark-icon--dark  { display: inline-block; }
.wordmark__cursor {
  display: inline-block;
  width: 0.55em;
  height: 0.85em;
  margin-left: 0.02em;
  background: currentColor;
  box-shadow: 0 0 0 2px currentColor;
  vertical-align: -0.05em;
  animation: blink 1s steps(1, end) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* =========================================================
   NavBar
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 56px;
  display: flex;
  align-items: center;
  background: var(--bg);
  border-bottom: 0.5px solid var(--rule);
  transition: background-color 200ms var(--ease-out),
    color 200ms var(--ease-out);
}
.nav--scrolled {
  background: color-mix(in oklab, var(--bg-dark) 92%, transparent);
  color: var(--ink-on-dark);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--rule-on-dark);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav__links {
  display: none;
  gap: 1.75rem;
}
@media (min-width: 900px) {
  .nav__links { display: flex; }
}
.nav__link {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 0.5px;
  background: var(--accent);
  clip-path: inset(0 100% 0 0);
  transition: clip-path 150ms var(--ease-out);
}
@media (max-width: 899px) {
  .nav__link::after { display: none; }
}
.nav__link:hover::after { clip-path: inset(0 0 0 0); }

.nav__cta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

/* =========================================================
   Day/Night Toggle - sliding-thumb slider
   ========================================================= */
.theme-toggle {
  position: relative;
  width: 64px;
  height: 30px;
  border: 1.5px solid currentColor;
  background: transparent;
  color: currentColor;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: stretch;
  overflow: hidden;
  flex-shrink: 0;
}
.theme-toggle__thumb {
  position: absolute;
  left: 2px;
  top: 2px;
  width: calc(50% - 4px);
  height: calc(100% - 4px);
  background: currentColor;
  transition: transform 320ms var(--ease-out);
  z-index: 0;
}
.theme-toggle[data-state="dark"] .theme-toggle__thumb {
  transform: translateX(calc(100% + 4px));
}
.theme-toggle__icon {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: color 280ms var(--ease-out);
}
.theme-toggle__icon--sun { color: var(--bg); }
.theme-toggle__icon--moon { color: currentColor; }
.theme-toggle[data-state="dark"] .theme-toggle__icon--sun { color: currentColor; }
.theme-toggle[data-state="dark"] .theme-toggle__icon--moon { color: var(--bg); }
.nav--scrolled .theme-toggle__icon--sun,
.nav--scrolled .theme-toggle[data-state="dark"] .theme-toggle__icon--moon {
  color: var(--bg-dark);
}

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  border: 1.5px solid currentColor;
  transition:
    background-color 140ms var(--ease-out),
    color 140ms var(--ease-out),
    transform 80ms var(--ease-out);
  text-transform: lowercase;
  cursor: pointer;
  white-space: nowrap;
  max-width: 100%;
  text-align: center;
}
.btn:active { transform: translateY(1px); }
.btn__label--mobile { display: none; }

/* primary on lime */
.btn--primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn--primary:hover {
  background: transparent;
  color: var(--ink);
}

/* primary on dark */
.section--dark .btn--primary,
.nav--scrolled .btn--primary {
  background: var(--ink-on-dark);
  color: var(--bg-dark);
  border-color: var(--ink-on-dark);
}
.section--dark .btn--primary:hover,
.nav--scrolled .btn--primary:hover {
  background: transparent;
  color: var(--ink-on-dark);
}

/* ghost (transparent w/ border) */
.btn--ghost {
  background: transparent;
  color: currentColor;
  border-color: currentColor;
}
.btn--ghost:hover {
  background: var(--ink);
  color: var(--bg);
}
.section--dark .btn--ghost:hover {
  background: var(--ink-on-dark);
  color: var(--bg-dark);
}

.btn--flash-accent {
  background: var(--accent) !important;
  color: var(--ink) !important;
  border-color: var(--accent) !important;
}
.btn--err {
  color: var(--signal-neg) !important;
  border-color: var(--signal-neg) !important;
  background: transparent !important;
}

/* =========================================================
   Terminal panel
   ========================================================= */
.terminal {
  position: relative;
  border: 2px dashed var(--ink);
  padding: 1.75rem 1rem 1.25rem;
  background: color-mix(in oklab, var(--bg) 91%, var(--ink) 9%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ink);
  transition: background-color 250ms var(--ease-out),
    border-color 250ms var(--ease-out),
    color 250ms var(--ease-out);
}
.section--dark .terminal {
  border-color: var(--ink-on-dark);
  background: color-mix(in oklab, var(--bg-dark) 93%, var(--ink-on-dark) 7%);
  color: var(--ink-on-dark);
}
.terminal__header {
  position: absolute;
  top: -0.7em;
  left: 50%;
  transform: translateX(-50%);
  max-width: calc(100% - 2rem);
  padding: 0 0.75em;
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: normal;
  overflow-wrap: anywhere;
  text-align: center;
  line-height: 1.35;
}
.section--dark .terminal__header {
  background: var(--bg-dark);
  color: var(--ink-dim-on-dark);
}
.terminal__body {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
  font-variant-ligatures: none;
}
.terminal__body--wrap { white-space: pre-wrap; }

/* Diff colors inside terminal */
.diff-minus { color: var(--signal-neg); }
.diff-plus  { color: var(--ink); font-weight: 500; }
.section--dark .diff-plus { color: var(--ink-on-dark); }

/* =========================================================
   Habit card
   ========================================================= */
.habit {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-mono);
}
.habit__rule {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
  overflow-wrap: break-word;
  word-break: break-word;
}
.section--dark .habit__rule { color: var(--ink-on-dark); }
.habit__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.8125rem;
}
.habit__pos { color: var(--signal-pos); }
.section--dark .habit__pos { color: var(--ink-muted-on-dark); }
.habit__neg { color: var(--signal-neg); }
.habit__since { color: var(--ink-dim); }
.section--dark .habit__since { color: var(--ink-dim-on-dark); }

.habit__bar-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

/* =========================================================
   Confidence bar
   ========================================================= */
.cbar {
  width: min(100%, 220px);
  height: 3px;
  background: var(--rule);
  border-radius: 1.5px;
  overflow: hidden;
  flex: 1 1 10rem;
  min-width: 0;
}
.section--dark .cbar { background: var(--rule-on-dark); }
.cbar__fill {
  width: var(--cbar-fill, 0%);
  height: 100%;
  border-radius: 1.5px;
  background: var(--accent);
  transition: width 600ms var(--ease-out);
}
.cbar__fill--learning { background: var(--learning); }
.cbar__fill--pruning  { background: var(--signal-neg); }
.cbar__label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-dim);
}
.section--dark .cbar__label { color: var(--ink-dim-on-dark); }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: auto;
  padding-block: 4.5rem 5rem;
  display: flex;
  align-items: flex-start;
  background: transparent;
}
/* Soft scrim behind the hero copy so the headline reads cleanly while the
   ASCII rain still frames the edges. Sits above the rain canvas (z 0) and
   below the hero content (.hero__inner, z 1). */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse 78% 68% at 32% 46%,
    var(--bg) 0%,
    color-mix(in oklab, var(--bg) 72%, transparent) 42%,
    transparent 74%
  );
}
@media (min-width: 768px) {
  .hero {
    min-height: 100svh;
    min-height: 100dvh;
    padding-block: 6rem 7rem;
    align-items: center;
  }
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .hero__inner { gap: 2rem; }
}
.hero__caption { color: var(--ink-dim); }
.hero__brand {
  display: flex;
  align-items: center;
  gap: 0.625rem 0.875rem;
  flex-wrap: wrap;
  margin-bottom: 0;
}
.hero__logo {
  color: var(--ink);
}
.hero__badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border: 1px solid var(--ink-dim);
  color: var(--ink-dim);
  border-radius: 999px;
  text-transform: lowercase;
  font-weight: 500;
  letter-spacing: 0.05em;
}
.hero__headline {
  max-width: 18ch;
  text-wrap: balance;
}
.hero__tagline {
  max-width: 60ch;
  color: var(--ink);
}
.hero__sub {
  max-width: 60ch;
  color: var(--ink-muted);
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.hero__meta {
  color: var(--ink-dim);
  font-size: 0.8125rem;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
}

/* =========================================================
   The Problem section - narrative bridge from hero to HowItWorks
   ========================================================= */
.problem {
  position: relative;
  background: var(--bg-dark);
  color: var(--ink-on-dark);
  padding-block: 4rem 5rem;
}
@media (min-width: 768px) {
  .problem { padding-block: 6rem 7rem; }
}
.problem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem 4rem;
  align-items: start;
}
@media (min-width: 900px) {
  .problem__grid { grid-template-columns: 1.05fr 1fr; }
}
.problem__pull {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.1;
  text-transform: lowercase;
  letter-spacing: 0;
  color: var(--ink-on-dark);
  text-wrap: balance;
  max-width: 18ch;
}
.problem__body p {
  color: var(--ink-muted-on-dark);
  margin-bottom: 1rem;
  max-width: 52ch;
}
.problem__body p:last-child { margin-bottom: 0; }
.problem__body strong {
  color: var(--ink-on-dark);
  font-weight: 500;
}
.problem__contrast {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-top: 2rem;
}
@media (min-width: 720px) {
  .problem__contrast { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
}

/* =========================================================
   Use Anywhere - two column layout
   ========================================================= */
.portable__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  align-items: start;
}
@media (min-width: 860px) {
  .portable__grid { grid-template-columns: 1fr 1.1fr; gap: 4rem; }
}
.portable__copy p {
  color: var(--ink-muted-on-dark);
  margin-bottom: 1rem;
  max-width: 50ch;
}
.portable__copy p:last-child { margin-bottom: 0; }
.directory-tree {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  margin-top: 1.75rem;
  padding: 1rem;
  border-radius: 4px;
  background: color-mix(in oklab, var(--bg-dark) 95%, var(--ink-on-dark) 5%);
  border: 1.5px dashed var(--rule-on-dark);
  color: var(--ink-muted-on-dark);
}
.directory-tree .tree-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 0.75rem;
}
.directory-tree .tree-line.indent {
  padding-left: 1.75rem;
}
.directory-tree .root {
  color: var(--ink-on-dark);
  font-weight: 700;
}
.directory-tree .file {
  color: var(--ink-on-dark);
  font-weight: 700;
}
.directory-tree .folder {
  color: var(--accent);
  font-weight: 700;
}
.directory-tree .comment {
  color: var(--ink-dim-on-dark);
  font-size: 0.8125rem;
}

/* Hero canvas is no longer used (rain is fixed at app level) */
.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 350ms var(--ease-out),
    transform 350ms var(--ease-out);
  will-change: opacity, transform;
}
.char--show { opacity: 1; transform: translateY(0); }

/* =========================================================
   How it works - static three-panel section
   ========================================================= */
.hiw {
  position: relative;
}
.hiw__panels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  width: 100%;
  align-items: start;
}
@media (max-width: 860px) {
  .hiw__panels {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}
.hiw__panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 600ms var(--ease-out),
    transform 600ms var(--ease-out);
}
.hiw__panel.is-revealed {
  opacity: 1;
  transform: translateY(0);
}
.hiw__panel-cap {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-muted);
  margin: 0;
  padding-left: 0.5rem;
  border-left: 2px solid var(--rule);
}
.hiw__panel-cap code {
  font-family: var(--font-mono);
  color: var(--ink);
  border-bottom: 0.5px solid var(--rule);
  padding: 0 0.15em;
}
.hiw__caption {
  margin-top: 3rem;
  color: var(--ink-muted);
  font-size: 0.9375rem;
  font-family: var(--font-mono);
  max-width: 64ch;
}

/* =========================================================
   Habits grid (Section 02)
   ========================================================= */
.habits-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
  width: 100%;
  padding-top: 0.75rem;
}
@media (max-width: 960px) {
  .habits-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Guardrails list
   ========================================================= */
.guardrails {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 0.5px solid var(--rule);
}
.guardrail {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1.5rem 2rem;
  padding: 1.75rem 0;
  border-bottom: 0.5px solid var(--rule);
  align-items: baseline;
}
@media (min-width: 768px) {
  .guardrail {
    grid-template-columns: 3.5rem 16rem 1fr;
    gap: 1.5rem 2.5rem;
  }
}
.guardrail__num {
  color: var(--ink-dim);
}
.guardrail__title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
}
.guardrail__body { color: var(--ink-muted); max-width: 56ch; }

/* =========================================================
   Use-anywhere ASCII tree
   ========================================================= */
.tree-wrap {
  margin-top: 2.5rem;
}
.tree {
  font-family: var(--font-mono);
  font-size: clamp(0.8125rem, 1.3vw, 1rem);
  line-height: 1.7;
  white-space: pre;
  color: var(--ink-on-dark);
}
.tree__comment { color: var(--ink-muted-on-dark); }

/* =========================================================
   Install panel
   ========================================================= */
.install-stack {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .install-stack { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

/* =========================================================
   FAQ
   ========================================================= */
.faq__group + .faq__group {
  margin-top: 3rem;
}
.faq__group-head {
  padding-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: 0.5px solid var(--rule);
}
.faq details {
  border-bottom: 0.5px solid var(--rule);
  border-radius: 12px;
  transition: background 200ms var(--ease-out),
              padding 200ms var(--ease-out),
              margin 200ms var(--ease-out),
              box-shadow 200ms var(--ease-out);
}
.faq details[open] {
  background: var(--bg-dark);
  color: var(--ink-on-dark);
  border-bottom-color: transparent;
  padding: 0 1.5rem;
  margin: 0.75rem 0;
  box-shadow: 0 12px 36px color-mix(in oklab, var(--bg-dark) 40%, transparent);
}
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  color: var(--ink);
  transition: color 150ms var(--ease-out);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 200ms var(--ease-out);
  color: var(--ink-dim);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq summary:hover { color: var(--accent); }
.faq details[open] summary { color: var(--ink-on-dark); }
.faq details[open] summary::after { color: var(--ink-on-dark); }
.faq details[open] summary:hover { color: var(--accent); }
.faq__body {
  padding: 0 0 1.5rem 0;
  max-width: 70ch;
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.65;
}
.faq details[open] .faq__body { color: var(--ink-muted-on-dark); }
.faq details[open] code {
  color: var(--ink-on-dark);
  border-bottom-color: var(--rule-on-dark);
}

/* =========================================================
   Final CTA
   ========================================================= */
.final-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  text-align: center;
}
.final-cta__title { max-width: 16ch; text-wrap: balance; }
.final-cta__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  background: var(--bg-dark);
  color: var(--ink-on-dark);
  border-top: 0.5px solid var(--rule-on-dark);
  padding: 4rem 0 2rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}
@media (min-width: 768px) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr; gap: 4rem; }
}
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted-on-dark);
  margin-bottom: 1rem;
}
.footer__col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__col a {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--ink-on-dark);
  transition: color 150ms var(--ease-out);
}
.footer__col a:hover { color: var(--accent); }
.footer__socials a {
  text-decoration: none !important;
}
.footer__socials a svg {
  transition: transform 150ms var(--ease-out), stroke 150ms var(--ease-out);
}
.footer__socials a:hover svg {
  stroke: var(--accent);
  transform: scale(1.15);
}
.footer__tagline {
  font-family: var(--font-mono);
  color: var(--ink-muted-on-dark);
  margin-top: 0.75rem;
  font-size: 0.9375rem;
}
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 0.5px solid var(--rule-on-dark);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-dim-on-dark);
}

/* =========================================================
   Arrows used in CTA labels (drawn inline)
   ========================================================= */
.arr { display: inline-block; transform: translateY(-0.05em); }

/* =========================================================
   Utility
   ========================================================= */
.ink-dim { color: var(--ink-dim); }
.section--dark .ink-dim { color: var(--ink-dim-on-dark); }
.ink-muted { color: var(--ink-muted); }
.section--dark .ink-muted { color: var(--ink-muted-on-dark); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mt-8 { margin-top: 4rem; }

@media (max-width: 640px) {
  .btn {
    width: 100%;
    white-space: normal;
  }
  .btn__label--desktop { display: none; }
  .btn__label--mobile { display: inline; }
  .nav__cta .btn { width: auto; }
  .hero__ctas > *,
  .final-cta__buttons > * {
    flex: 1 1 100%;
  }
  .hero__headline {
    max-width: 10ch;
  }
  .problem__pull {
    max-width: 11ch;
  }
  .guardrail {
    grid-template-columns: 1fr;
    gap: 0.625rem;
  }
  .guardrail__num {
    margin-bottom: 0.25rem;
  }
  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* =========================================================
   Live demo - two-panel session replay
   ========================================================= */
.live-demo {
  margin-bottom: 0;
}
.live-demo__panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 720px) {
  .live-demo__panels { grid-template-columns: 1fr; }
}
.live-demo__body {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  min-height: 8rem;
}
.ldd-line {
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 1.35em;
  color: var(--ink);
}
.section--dark .ldd-line,
.hiw .ldd-line { color: var(--ink); }

.ldd-minus  { color: var(--signal-neg); }
.ldd-plus   { color: var(--ink); font-weight: 500; }
.ldd-ok     { color: var(--signal-pos); }
.ldd-dim    { color: var(--ink-dim); }
.ldd-accent { color: var(--accent); }
.ldd-section { color: var(--accent); font-weight: 600; }
.ldd-new    { color: var(--learning); }

@keyframes ldd-blink { 50% { opacity: 0; } }
.ldd-cursor {
  display: inline-block;
  animation: ldd-blink 900ms steps(1) infinite;
  color: var(--ink);
  font-size: 0.875rem;
  line-height: 1;
}

/* =========================================================
   Copy CTA pulse on success
   ========================================================= */
@keyframes copy-pulse {
  0%   { transform: scale(1); }
  35%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}
.btn--flash-accent {
  animation: copy-pulse 280ms var(--ease-out) forwards;
}

.live-demo__replay {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color 150ms var(--ease-out);
}
.live-demo__replay:hover { color: var(--accent); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ── Integration marquee ─────────────────────────────────────────────── */
.mq {
  padding: 2.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}
.mq__caption {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 1.5rem;
}
.mq__viewport {
  position: relative;
  width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.mq__track {
  display: flex;
  width: max-content;
  gap: 3rem;
  animation: mq-scroll 32s linear infinite;
}
.mq:hover .mq__track { animation-play-state: paused; }
.mq__item {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  white-space: nowrap;
}
.mq__logo {
  width: 22px;
  height: 22px;
  color: var(--ink-muted);
  opacity: 0.78;
  transition: color 0.2s, opacity 0.2s;
}
.mq__item:hover .mq__logo { color: var(--ink); opacity: 1; }
.mq__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--ink-muted);
}
.mq__name {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-muted);
}
@keyframes mq-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .mq__track {
    animation: none;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.25rem 2.5rem;
  }
  .mq__viewport { -webkit-mask-image: none; mask-image: none; }
}

/* ── Mistake memory cards ─────────────────────────────────────────────── */
.memory {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.memory__when {
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
}
.memory__caution {
  font-weight: 500;
  color: var(--signal-neg);
}
.memory__fix {
  color: var(--ink-muted);
}