/* Welcome to the Machine: tokens mirror the brand guide (5 Nov 2026, black and white).
   Paper ground, black type and rules, black panels for emphasis, one cobalt signal
   (the M. period). Electric blue only for small labels inside black panels. */
:root {
  color-scheme: light;

  /* Brand palette */
  --paper: #f7f7f8;
  --electric-blue: #00b0ff;
  --cobalt: #0047ff;
  --silver: #c0c6d4;
  --charcoal: #1a1a1f;
  --black: #000000;

  /* Semantic */
  --surface: var(--paper);
  --panel: var(--black);
  --on-panel: var(--paper);
  --on-panel-muted: rgba(247, 247, 248, 0.72);
  --on-panel-accent: var(--electric-blue);
  --ink: var(--black);
  --body: var(--charcoal);
  --ink-muted: #55555c;
  --line: var(--silver);
  --line-strong: var(--black);
  --accent: var(--cobalt);
  --focus: var(--cobalt);

  /* Type */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 112px;

  --radius-pill: 999px;
  --max: 1200px;
  --gutter: clamp(16px, 5vw, 64px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--body);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--ink); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
h1, h2, h3, h4 { margin: 0; text-wrap: balance; color: var(--ink); }
p { margin: 0; }

.skip { position: absolute; left: -10000px; top: 8px; z-index: 50; background: var(--ink); color: var(--paper); padding: 8px 12px; }
.skip:focus { left: 16px; }

.wrap {
  max-width: calc(var(--max) + 2 * var(--gutter));
  margin: 0 auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left, 0px));
  padding-right: max(var(--gutter), env(safe-area-inset-right, 0px));
}

/* ---------- Type ---------- */
.label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-muted);
  white-space: nowrap;
  margin-bottom: var(--space-4);
}
.label::after { content: ""; flex: 0 1 120px; height: 1px; background: var(--line-strong); }
.label--accent { color: var(--ink); }
.label--center { justify-content: center; }
.label--center::before { content: ""; flex: 0 1 120px; height: 1px; background: var(--line-strong); }

.h-section {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  max-width: 22ch;
}
.h-sub {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: var(--space-6) 0 var(--space-4);
}
.lead {
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.55;
  color: var(--ink-muted);
  max-width: 60ch;
  margin-top: var(--space-4);
}
.small { font-size: 14px; color: var(--ink-muted); max-width: 65ch; margin-top: var(--space-4); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.2s ease-out, background 0.2s ease-out, color 0.2s ease-out;
}
.btn__arrow { font-family: var(--font-sans); letter-spacing: 0; transition: transform 0.2s ease-out; }
.btn:hover .btn__arrow { transform: translateX(3px); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: var(--charcoal); }
.btn--ghost { color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--small { padding: 9px 18px; font-size: 12px; }
.btn--large { padding: 18px 34px; font-size: 14px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 247, 248, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-strong);
  padding-top: env(safe-area-inset-top, 0px);
}
.nav__inner {
  max-width: calc(var(--max) + 2 * var(--gutter));
  margin: 0 auto;
  padding: 14px max(var(--gutter), env(safe-area-inset-right, 0px)) 14px max(var(--gutter), env(safe-area-inset-left, 0px));
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.nav__brand { display: flex; }
.nav__brand img { height: 26px; width: auto; display: block; }
.nav__links { display: flex; gap: var(--space-5); margin-left: auto; }
.nav__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.2s ease-out;
}
.nav__links a:hover { color: var(--ink); }
@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav .btn { margin-left: auto; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(48px, 8vw, 104px) clamp(56px, 8vw, 112px);
  background: var(--surface);
}
.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: var(--space-5);
  align-items: center;
}
.hero__copy { min-width: 0; }

/* Modern wordmark as the hero mark: mono label over wide black display type,
   with the cobalt period as the page's one signal. */
.hero-mark { display: flex; flex-direction: column; gap: 6px; }
.hero-mark__top {
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.4vw, 18px);
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--ink);
}
.hero-mark__main {
  font-family: var(--font-display);
  font-weight: 800;
  font-stretch: 125%;
  font-size: clamp(3rem, 8.4vw, 7.4rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--ink);
  animation: mark-in 0.8s ease-out both;
}
.hero-mark__dot { color: var(--accent); }
@keyframes mark-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
.hero__tagline {
  margin-top: var(--space-4);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.2;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-5); }

.hero__art { position: relative; display: flex; justify-content: center; align-items: center; min-width: 0; }
.hero__words {
  position: absolute;
  right: 0;
  top: 0;
  list-style: none;
  margin: 0;
  padding: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  line-height: 1.9;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--line-strong);
}

/* Silhouette art: the handshake artwork, black on paper, no colour.
   assets/background.png is a black silhouette on a transparent PNG. */
.artwork-wrap {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 984 / 1212;
}
.artwork {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { order: -1; justify-content: flex-start; }
  .artwork-wrap { width: min(44vw, 190px); }
  .hero__words { right: 0; top: auto; bottom: 0; }
  .hero-mark__main { font-size: 13vw; }
  .hero { padding-block: 28px 56px; }
}

/* ---------- Sections ---------- */
.section {
  border-top: 1px solid var(--line-strong);
  padding-block: clamp(64px, 9vw, 112px);
}

.principle { background: var(--panel); color: var(--on-panel); border-top: 0; }
.principle .label { color: var(--on-panel-accent); }
.principle .label::after { background: var(--on-panel-muted); }
.principle__quote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 34ch;
  text-wrap: balance;
  color: var(--on-panel);
}

/* Offer */
.offers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.offer {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: clamp(24px, 3vw, 40px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  min-width: 0;
}
.offer > p:not(.offer__for) { color: var(--ink-muted); }
.offer__for {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.offer__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 2.5vw, 32px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}
.offer__points { margin: 0; display: grid; gap: var(--space-3); }
.offer__points > div { display: grid; grid-template-columns: 170px 1fr; gap: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--line); }
.offer__points dt { font-weight: 600; color: var(--ink); }
.offer__points dd { margin: 0; color: var(--ink-muted); font-size: 15px; }
.offer__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: var(--space-3);
}
.offer__pilots ol { margin: 0; padding-left: 20px; display: grid; gap: var(--space-2); font-size: 15px; color: var(--ink-muted); }
.offer__pilots b { color: var(--ink); font-weight: 600; }
.offer__note { margin-top: auto; font-size: 14px; padding-top: var(--space-3); border-top: 1px solid var(--line); }
@media (max-width: 900px) {
  .offers { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .offer__points > div { grid-template-columns: 1fr; gap: var(--space-1); }
}

/* Method: layers */
.layers { margin-top: var(--space-6); display: grid; gap: var(--space-3); }
.layer {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ink);
}
.layer__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding-top: 5px;
}
.layer__title { font-family: var(--font-display); font-size: 20px; font-weight: 700; line-height: 1.3; margin-bottom: 6px; }
.layer__body { color: var(--ink-muted); max-width: 62ch; }
@media (max-width: 640px) {
  .layer { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* Method: questions and gates */
.questions, .gates {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}
.questions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gates { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.questions li, .gates li { padding-top: var(--space-3); border-top: 2px solid var(--line-strong); min-width: 0; }
.q__no, .gate__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: var(--space-2);
}
.questions h4, .gates h4 { font-family: var(--font-display); font-size: 20px; font-weight: 700; margin-bottom: var(--space-2); }
.questions p, .gates p { color: var(--ink-muted); font-size: 15px; }
@media (max-width: 900px) {
  .gates { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .questions, .gates { grid-template-columns: 1fr; }
}

/* Privacy */
.privacy__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}
.privacy__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.privacy__list li { padding-block: var(--space-4); border-top: 1px solid var(--line); }
.privacy__list li:last-child { border-bottom: 1px solid var(--line); }
.privacy__list h4 { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: var(--space-1); }
.privacy__list p { color: var(--ink-muted); font-size: 15px; }
@media (max-width: 860px) {
  .privacy__grid { grid-template-columns: 1fr; gap: var(--space-5); }
}

/* Why us: compare */
.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--ink);
  margin-top: var(--space-6);
}
.compare > div { padding: clamp(24px, 3vw, 40px); min-width: 0; }
.compare__old { color: var(--ink-muted); }
.compare__new { background: var(--panel); color: var(--on-panel); }
.compare h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.compare__new h3 { color: var(--on-panel-accent); }
.compare ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.compare li { position: relative; padding-left: 22px; }
.compare__old li::before { content: "–"; position: absolute; left: 0; }
.compare__new li::before { content: ""; position: absolute; left: 2px; top: 0.6em; width: 7px; height: 7px; background: var(--on-panel); }
@media (max-width: 760px) {
  .compare { grid-template-columns: 1fr; }
}

/* CTA */
.cta { background: var(--surface); }
.cta__inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.cta__inner .h-section { max-width: 20ch; }
.cta__inner .lead { margin-bottom: var(--space-5); }
.cta__mark { width: 72px; height: auto; margin-bottom: var(--space-5); }
.cta__mail { margin-top: var(--space-4); font-size: 14px; color: var(--ink-muted); }

/* Footer */
.footer { border-top: 1px solid var(--line-strong); padding-block: var(--space-6) calc(var(--space-6) + env(safe-area-inset-bottom, 0px)); }
.footer__inner { display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--space-4) var(--space-5); }
.wordmark { display: inline-flex; flex-direction: column; gap: 2px; font-size: 34px; }
.wordmark__top, .wordmark__main { font-family: var(--font-display); font-weight: 800; font-stretch: 125%; }
.wordmark__top { font-size: 0.38em; letter-spacing: 0.04em; }
.wordmark__main { line-height: 0.9; letter-spacing: -0.02em; }
.wordmark__dot { color: var(--accent); }
.footer__line { font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.footer__meta { margin-left: auto; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--ink-muted); }
@media (max-width: 760px) {
  .footer__meta { margin-left: 0; width: 100%; }
}

/* ---------- Sound toggle ---------- */
@media (max-width: 600px) {
  .sound-toggle .label-text { display: none; }
  .sound-toggle { padding: 12px; right: calc(14px + env(safe-area-inset-right, 0px)); bottom: calc(14px + env(safe-area-inset-bottom, 0px)); }
}
.sound-toggle {
  position: fixed;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  right: calc(20px + env(safe-area-inset-right, 0px));
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: rgba(247, 247, 248, 0.9);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 0.2s ease-out;
}
.sound-toggle:hover { border-color: var(--ink); }
.sound-toggle .icon { font-size: 0.7rem; line-height: 1; }
.sound-toggle .icon-on { display: none; }
.sound-toggle[aria-pressed="true"] .icon-on { display: inline; }
.sound-toggle[aria-pressed="true"] .icon-off { display: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-mark__main { animation: none; }
  .btn, .btn__arrow { transition: none; }
}