/* Memford's landing world: expansive signals, connected receptors and useful knowledge. */
#landing {
  isolation: isolate;
  --landing-gutter: 32px;
  --landing-measure: 1180px;
}

#landing .content-width {
  width: calc(100% - var(--landing-gutter) * 2);
  max-width: var(--landing-measure);
}

/* The diagram's separate stage and centered pin geometry remain untouched. */
#landing .landing-hero,
#landing .landing-section {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}
#landing .landing-hero > .content-width,
#landing .landing-section > .content-width {
  position: relative;
  z-index: 1;
}
#landing .landing-section {
  padding-block: clamp(100px, 10vw, 150px);
}
#landing .landing-section .steps-section,
#landing .landing-section .product-section {
  padding-top: 0;
}

/* A static, connected network is the default. Scripts only add reversible motion. */
#landing .receptor-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  color: var(--accent);
  mask-image: linear-gradient(180deg, transparent, #000 15%, #000 85%, transparent);
}
#landing .receptor-lines {
  display: block;
  width: 140%;
  height: 100%;
  margin-inline-start: -20%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}
#landing .receptor-lines > path {
  opacity: .2;
  vector-effect: non-scaling-stroke;
}
#landing .receptor-lines .receptor-wash {
  stroke-width: 86;
  opacity: .045;
}
#landing .receptor-pair {
  opacity: .32;
  transform-box: view-box;
  transform-origin: 800px 500px;
}
#landing .receptor-pair path { stroke-width: 2; }
#landing .receptor-left,
#landing .receptor-right {
  transform-box: view-box;
  transform-origin: 800px 500px;
}
#landing .receptor-bridge {
  opacity: .3;
  stroke-width: 1.8;
}
#landing .receptor-contact {
  opacity: .32;
  stroke-width: 2;
  transform-box: fill-box;
  transform-origin: center;
}
#landing .receptor-spark { opacity: 0; }
#landing .receptor-field--memory {
  --signal-progress: .5;
  --signal-energy: 0;
  z-index: -1;
  inset: -64px 0;
}
#landing .memory-stage.scroll-linked .receptor-field--memory {
  --signal-progress: var(--memory-progress, .5);
  --signal-energy: clamp(0, min(calc((var(--memory-progress, .5) - .35) * 6.6667), calc((.65 - var(--memory-progress, .5)) * 6.6667)), 1);
}
#landing .receptor-field--memory > .receptor-lines { opacity: 1; }
#landing .landing-setup .receptor-field { opacity: .75; }
#landing .landing-product .receptor-field { opacity: .58; }
#landing .landing-closing .receptor-field { opacity: 1; }

#landing.signals-enabled .receptor-pair {
  --receptor-approach: clamp(0, calc(var(--signal-progress, .5) * 2), 1);
  opacity: calc(.24 + var(--signal-energy, 0) * .28);
  transform: translate3d(0, calc((var(--signal-progress, .5) - .5) * 32px), 0);
}
#landing.signals-enabled .receptor-left {
  transform: translate3d(calc((var(--receptor-approach, 1) - 1) * 160px), 0, 0);
}
#landing.signals-enabled .receptor-right {
  transform: translate3d(calc((1 - var(--receptor-approach, 1)) * 160px), 0, 0);
}
#landing.signals-enabled .receptor-bridge {
  opacity: clamp(.035, calc((var(--signal-progress, .5) - .32) * 1.45), .38);
}
#landing.signals-enabled .receptor-contact {
  opacity: calc(.2 + var(--signal-energy, 0) * .7);
  transform: scale(calc(1 + var(--signal-energy, 0) * .14));
}
#landing.signals-enabled .receptor-lines .receptor-spark {
  stroke: var(--ink);
  stroke-width: 2.3;
  stroke-dasharray: 24 1000;
  stroke-dashoffset: calc(var(--signal-progress, .5) * -1000);
  opacity: calc(var(--signal-energy, 0) * .75);
}

/* A precise header introduces the same type, action and line language as the page. */
#landing .site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--bg);
  border-bottom-color: var(--line);
}
#landing .header-actions { gap: 20px; }
#landing .header-actions .header-copy {
  min-height: 44px;
  min-width: 172px;
  padding: 10px 16px;
  font-size: 13px;
  white-space: nowrap;
}
#landing .header-copy svg { width: 17px; height: 17px; }
#landing .header-copy.setup-invitation { animation: setup-invitation 1600ms ease-in-out 2; }
@keyframes setup-invitation {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.025); background: var(--accent-hover); }
}
#landing .header-inner {
  max-width: 1280px;
  width: calc(100% - var(--landing-gutter) * 2);
  height: 84px;
  gap: 52px;
}
#landing .brand { gap: 11px; }
#landing .site-nav { gap: 32px; }
#landing .site-nav a,
#landing .header-actions .text-button,
#landing .site-footer > a:not(.brand) {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  transition: color 150ms var(--ease);
}
#landing .site-nav a:is(:hover, :focus-visible),
#landing .header-actions .text-button:is(:hover, :focus-visible),
#landing .site-footer > a:is(:hover, :focus-visible) { color: var(--accent); }
#landing :is(a, button, textarea):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}
#landing .button {
  min-height: 52px;
  padding: 14px 25px;
  font-size: 15px;
  border-radius: 7px;
}
#landing .button.subtle {
  background: var(--subtle, #1b1c22);
  color: var(--subtle-ink, #dcdce3);
}
#landing .button.subtle:hover { background: var(--subtle-hover, #272832); }

/* The hero has room for the neural field without making the message compete with it. */
#landing .landing-hero .hero {
  text-align: center;
  padding-top: clamp(76px, 7.4vw, 110px);
  padding-bottom: 52px;
}
#landing .hero h1 {
  max-width: 1050px;
  margin-inline: auto;
  font-size: clamp(50px, 7.4vw, 96px);
  line-height: 1.04;
  letter-spacing: -.035em;
}
#landing .hero h1 span { color: var(--accent); }
#landing .hero-copy {
  max-width: 720px;
  margin-top: 30px;
  font-size: 19px;
  line-height: 1.7;
  color: var(--muted);
}
#landing .hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
#landing .hero-actions .button { min-width: 158px; }
#landing .hero-note { margin-top: 22px; font-size: 13px; color: var(--muted); }

/* Setup is the page's one operational centerpiece. The prompt itself stays exposed. */
#landing .landing-setup .section-heading {
  display: block;
  max-width: 860px;
  margin: 0 auto 44px;
  text-align: center;
}
#landing .section-heading h2 {
  font-size: clamp(36px, 4.5vw, 58px);
  line-height: 1.12;
  letter-spacing: -.035em;
}
#landing .section-heading > p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}
#landing .landing-setup .section-heading > p {
  max-width: 650px;
  margin: 22px auto 0;
}
#landing .setup-prompt-panel {
  max-width: 920px;
  margin: 0 auto 54px;
  padding: 48px 48px 40px;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: 12px;
}
#landing .setup-prompt-panel label {
  font-size: 34px;
  line-height: 1.25;
  letter-spacing: -.025em;
}
#landing .setup-prompt-panel > p {
  max-width: 64ch;
  margin: 14px auto 26px;
  font-size: 15px;
  line-height: 1.7;
}
#landing .setup-prompt-field {
  max-width: none;
  padding: 21px 23px;
  margin-bottom: 24px;
  color: var(--prompt-ink, #d8d1e2);
  font-size: 14px;
  line-height: 1.75;
  border-color: var(--prompt-line, #494052);
  background: var(--prompt-bg, #0d0e12);
  border-radius: 7px;
}
#landing .setup-prompt-panel > .button { min-width: 260px; min-height: 54px; }
#landing .setup-prompt-panel > .setup-guide-note {
  margin: 20px auto 0;
  max-width: 66ch;
  font-size: 13px;
  line-height: 1.7;
}
#landing .step-list {
  max-width: 1000px;
  margin-inline: auto;
  gap: 48px;
  padding-block: 32px 36px;
  border-color: var(--line);
}
#landing .step-list h3 { font-size: 18px; letter-spacing: -.02em; }
#landing .step-list p { font-size: 15px; line-height: 1.75; }

/* Knowledge reads as four chapters in one system, never as a wall of feature cards. */
#landing .landing-product .section-heading {
  gap: 90px;
  align-items: flex-end;
  margin-bottom: 56px;
}
#landing .landing-product .section-heading > p { max-width: 430px; }
#landing .memory-capabilities { border-top-color: var(--line); }
#landing .memory-capability {
  grid-template-columns: minmax(260px, .8fr) minmax(0, 1.35fr);
  gap: 96px;
  padding: 52px 0 56px;
  border-bottom-color: var(--line);
}
#landing .memory-capability h3 {
  max-width: 18ch;
  font-size: clamp(25px, 2.3vw, 32px);
  line-height: 1.3;
  letter-spacing: -.025em;
}
#landing .memory-capability p {
  max-width: 65ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}
#landing .memory-capability p + p { margin-top: 18px; }
#landing .memory-capability .inline-link {
  min-height: 44px;
  margin-top: 18px;
  font-size: 15px;
  line-height: 1.7;
}
#landing .capability-links { gap: 0 26px; }
#landing .memory-preview-note {
  margin-top: 38px;
  max-width: 76ch;
  font-size: 14px;
}
#landing .memory-preview-note summary { min-height: 48px; }
#landing .memory-preview-note > p { line-height: 1.8; margin-top: 14px; }

/* A confident close reconnects the signal to the same free setup action. */
#landing .landing-closing { padding-block: 120px 130px; }
#landing .closing {
  padding: 0;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  text-align: center;
  gap: 34px;
}
#landing .closing h2 {
  font-size: clamp(42px, 5.8vw, 76px);
  line-height: 1.1;
  letter-spacing: -.035em;
}
#landing .closing .button { min-width: 178px; }
#landing .site-footer {
  padding-block: 38px 42px;
  gap: 26px;
  border-top-color: var(--line);
}
#landing .site-footer p { font-size: 13px; line-height: 1.7; color: var(--muted); }
#landing .site-footer .brand { font-size: 21px; }
#landing .site-footer .brand svg { width: 24px; height: 24px; }

@media (max-width: 1000px) {
  #landing .header-inner { gap: 36px; }
  #landing .landing-product .section-heading { gap: 48px; }
  #landing .memory-capability { grid-template-columns: minmax(210px, .8fr) minmax(0, 1.4fr); gap: 48px; }
  #landing .step-list { gap: 30px; }
}

@media (max-width: 760px) {
  #landing { --landing-gutter: 20px; }
  #landing .header-inner { height: 72px; gap: 22px; }
  #landing .header-actions { gap: 14px; }
  #landing .landing-hero .hero { padding-top: 70px; padding-bottom: 36px; }
  #landing .hero h1 { font-size: clamp(42px, 9vw, 64px); line-height: 1.08; }
  #landing .hero-copy { max-width: 40ch; margin-top: 24px; font-size: 16px; line-height: 1.75; }
  #landing .hero-actions { margin-top: 28px; gap: 10px; }
  #landing .hero-note { margin-top: 20px; font-size: 12px; }
  #landing .landing-section { padding-block: 82px 88px; }
  #landing .landing-setup .section-heading { margin-bottom: 32px; }
  #landing .section-heading h2 { font-size: clamp(32px, 6.8vw, 42px); line-height: 1.18; }
  #landing .section-heading > p { font-size: 15px; line-height: 1.8; }
  #landing .landing-setup .section-heading > p { margin-top: 20px; }
  #landing .setup-prompt-panel { margin-bottom: 36px; padding: 30px 22px 26px; }
  #landing .setup-prompt-panel label { font-size: 28px; }
  #landing .setup-prompt-panel > p { font-size: 14px; margin-block: 14px 22px; }
  #landing .setup-prompt-field { min-height: 280px; padding: 17px 16px; font-size: 13px; }
  #landing .setup-prompt-panel > .button { min-width: 0; width: 100%; min-height: 52px; }
  #landing .setup-prompt-panel > .setup-guide-note { margin-top: 18px; font-size: 12px; }
  #landing .step-list { gap: 28px; padding-block: 28px 32px; }
  #landing .step-list h3 { font-size: 17px; }
  #landing .step-list p { font-size: 14px; }
  #landing .landing-product .section-heading { margin-bottom: 36px; }
  #landing .landing-product .section-heading > p { max-width: 55ch; margin-top: 20px; }
  #landing .memory-capability { grid-template-columns: 1fr; gap: 18px; padding: 34px 0 38px; }
  #landing .memory-capability h3 { max-width: none; font-size: 26px; }
  #landing .memory-capability p { font-size: 15px; line-height: 1.8; }
  #landing .memory-capability p + p { margin-top: 15px; }
  #landing .memory-capability .inline-link { margin-top: 16px; font-size: 14px; }
  #landing .capability-links { gap: 0 22px; }
  #landing .memory-preview-note { margin-top: 26px; }
  #landing .landing-closing { padding-block: 84px 92px; }
  #landing .closing { gap: 28px; }
  #landing .closing h2 { font-size: clamp(40px, 8vw, 56px); }
  #landing .site-footer { padding-block: 30px 34px; align-items: center; gap: 20px; }
  #landing .site-footer p { order: 4; max-width: none; width: 100%; }
  #landing .receptor-lines { width: 190%; margin-inline-start: -45%; }
  #landing .receptor-pair { opacity: .24; }
  #landing.signals-enabled .receptor-pair { opacity: calc(.18 + var(--signal-energy, 0) * .2); }
}

@media (max-width: 380px) {
  #landing .hero h1 { font-size: 38px; }
  #landing .hero-actions { flex-direction: column; align-items: stretch; }
  #landing .hero-actions .button { width: 100%; min-width: 0; }
  #landing .setup-prompt-panel { padding-inline: 16px; }
  #landing .setup-prompt-panel label { font-size: 25px; }
  #landing .setup-prompt-field { padding-inline: 13px; }
  #landing .memory-capability h3 { font-size: 24px; }
}

@media (max-width: 760px) {
  #landing .site-header.has-setup-action .brand span { display: none; }
  #landing .header-inner { gap: 12px; }
  #landing .header-actions { gap: 12px; }
  #landing .header-actions .header-copy { min-width: 164px; padding-inline: 12px; }
}

/* Still connected, fully legible: reduced motion never depends on a scroll timer. */
#landing .content-arriving { animation: content-arriving 180ms ease-out both; }
@keyframes content-arriving { from { opacity: .5; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  #landing .content-arriving { animation: none; }
  #landing .header-copy.setup-invitation { animation: none; }
  #landing .receptor-pair,
  #landing.signals-enabled .receptor-pair { opacity: .24; transform: none; }
  #landing .receptor-left,
  #landing .receptor-right,
  #landing.signals-enabled .receptor-left,
  #landing.signals-enabled .receptor-right { transform: none; }
  #landing .receptor-contact,
  #landing.signals-enabled .receptor-contact { opacity: .26; transform: none; }
  #landing .receptor-bridge,
  #landing.signals-enabled .receptor-bridge { opacity: .28; }
  #landing .receptor-spark,
  #landing.signals-enabled .receptor-lines .receptor-spark { display: none; }
  #landing .button,
  #landing .site-nav a,
  #landing .header-actions .text-button,
  #landing .site-footer > a { transition: none; }
  #landing .button:hover,
  #landing .button:active { transform: none; }
}