/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
body {
  margin: 0;
}
::selection {
  background: var(--color-selection);
}
:focus-visible {
  outline: var(--focus-ring-width) solid var(--color-focus-ring);
  outline-offset: var(--focus-ring-offset);
  border-radius: var(--radius-stamp);
}
a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--color-line-strong);
  text-underline-offset: 3px;
}
a:hover {
  text-decoration-color: var(--color-text);
}
h1,
h2,
p,
ol,
ul,
dl,
dd,
figure,
figcaption {
  margin: 0;
}
.wrap {
  max-width: var(--layout-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  line-height: var(--text-mono-line);
}
.label {
  font-family: var(--font-mono);
  font-size: var(--text-label-size);
  line-height: var(--text-label-line);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
}
.muted {
  color: var(--color-text-secondary);
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Header ---------- */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-6) 0;
}
.site-nav {
  display: flex;
  gap: var(--space-6);
}
.wordmark {
  text-decoration: none;
  font-weight: var(--font-weight-medium);
}
.site-header a.mono {
  text-decoration: none;
  color: var(--color-text-secondary);
}
.site-header a.mono:hover {
  color: var(--color-text);
}

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: var(--space-12);
  align-items: start;
  padding: var(--space-12) 0 var(--space-16);
}
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    padding-top: var(--space-8);
  }
}
.pitch {
  display: grid;
  gap: var(--space-8);
}
h1 {
  font-size: var(--text-display-size);
  line-height: var(--text-display-line);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-display);
}
.hero h1 {
  font-size: 36px;
  line-height: 44px;
  letter-spacing: -0.04em;
}
.steps li > span:last-child {
  max-width: 30ch;
  font-size: 15px;
}
.lede {
  font-size: 15px;
}
.headline {
  display: grid;
  gap: var(--space-4);
}
.lede {
  color: var(--color-text-secondary);
  max-width: 36ch;
}
.requirements {
  margin-top: calc(-1 * var(--space-6));
}
@media (max-width: 600px) {
  h1 {
    font-size: var(--text-h1-size);
    line-height: var(--text-h1-line);
    letter-spacing: var(--tracking-heading);
  }
  .hero h1 {
    font-size: 30px;
    line-height: 38px;
  }
}
.steps {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-line);
}
.steps li {
  display: grid;
  grid-template-columns: 3ch minmax(0, 1fr);
  gap: var(--space-4);
  align-items: baseline;
}
.steps .n {
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  color: var(--color-text-tertiary);
}
.command-row {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-control);
  background: var(--color-surface-raised);
  width: max-content;
  max-width: 100%;
}
.command-row code {
  font-family: var(--font-mono);
  font-size: var(--text-command-size);
  line-height: var(--text-command-line);
  font-weight: var(--font-weight-medium);
  padding: var(--space-3) var(--space-4);
}
.command-row code::before {
  content: "$ ";
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-regular);
}
.btn {
  font: inherit;
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  line-height: var(--text-mono-line);
  font-weight: var(--font-weight-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-control);
  border: 1px solid var(--color-line-strong);
  background: var(--color-surface-raised);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out);
}
.btn:hover {
  background: var(--color-surface-sunken);
}
.btn:disabled {
  color: var(--color-text-tertiary);
  cursor: default;
  background: var(--color-surface-raised);
}
.btn-primary {
  background: var(--color-surface-inverse);
  color: var(--color-text-inverse);
  border-color: var(--color-surface-inverse);
}
.btn-primary:hover {
  background: #23273a;
}
.btn-danger {
  color: var(--color-danger);
}
.btn-danger:disabled {
  color: var(--color-text-tertiary);
}
.command-row .btn {
  border: 0;
  border-left: 1px solid var(--color-line-strong);
  border-radius: 0 var(--radius-control) var(--radius-control) 0;
  min-width: 6rem;
}

/* ---------- Figure 1: the handoff ---------- */
figure {
  display: grid;
  gap: var(--space-4);
}
figcaption {
  font-size: var(--text-small-size);
  line-height: var(--text-small-line);
  color: var(--color-text-secondary);
}
figcaption .fig {
  font-family: var(--font-mono);
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
  margin-right: var(--space-2);
}
.handoff {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}
@media (max-width: 600px) {
  .handoff {
    grid-template-columns: 1fr;
  }
}
.port {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}
.port-head {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
}
.slot {
  border: 1px dashed var(--color-line-strong);
  border-radius: var(--radius-card);
  position: relative;
}
/* While the card is with Muse, the home slot says what remains on this computer. */
#slot-home::after {
  content: "approved copy stays here";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
  opacity: 0;
  transition: opacity var(--duration-base) ease-out;
}
.handoff:is([data-state="arrived"], [data-state="ready"]) #slot-home::after {
  opacity: 1;
}
.stays {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line);
  color: var(--color-text-secondary);
}
.stays li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
}
.stays .r {
  color: var(--color-text-tertiary);
}
.stays li[hidden] {
  display: none;
}
.handoff[data-state="revoked"] .verified li {
  text-decoration: line-through;
  color: var(--color-text-tertiary);
}

/* ---------- The passport ---------- */
.pp {
  --pp-fill: var(--color-passport);
  background: var(--pp-fill);
  color: var(--color-on-passport);
  border-radius: var(--radius-card);
  display: grid;
  transition: background-color var(--duration-base) var(--ease-out);
}
.pp .label {
  color: var(--color-on-passport-secondary);
}
.pp-title {
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  line-height: var(--text-mono-line);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: var(--font-weight-semibold);
}
.pp-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.pp-rows {
  display: grid;
  gap: var(--space-3);
}
.pp-row {
  display: grid;
  grid-template-columns: var(--passport-label-column) minmax(0, 1fr);
  gap: var(--space-4);
  align-items: baseline;
}
.pp-row dd {
  font-family: var(--font-mono);
  font-size: var(--text-field-size);
  line-height: var(--text-field-line);
  min-width: 0;
  overflow-wrap: anywhere;
}
.pp .dim {
  color: var(--color-on-passport-secondary);
}
.pp .rule {
  border: 0;
  border-top: 1px solid var(--color-on-passport-secondary);
  opacity: 0.4;
  margin: 0;
}
.fp span + span::before {
  content: " ";
  display: inline-block;
  width: 0.5ch;
}

/* Share ticks: one tick per hour. Elapsed ticks are solid. */
.ticks {
  --elapsed: 0;
  position: relative;
  height: 10px;
  width: 100%;
  max-width: 24rem;
  color: var(--color-on-passport-ticks);
  background: repeating-linear-gradient(
    90deg,
    currentColor 0 2px,
    transparent 2px calc(100% / var(--share-ticks))
  );
}
.ticks::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: calc(var(--elapsed) * 100%);
  background: repeating-linear-gradient(
    90deg,
    var(--color-on-passport) 0 2px,
    transparent 2px calc(100% / (var(--share-ticks) * max(var(--elapsed), 0.0001)))
  );
}
.ticks-row {
  display: grid;
  gap: 6px;
}

/* Readiness rings: shape first. */
.ring {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-round);
  border: 1.5px solid currentColor;
  position: relative;
  display: inline-block;
  flex: none;
  vertical-align: -1px;
  transition: background-color var(--duration-fast) var(--ease-out);
}
.ring.installed {
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
}
.ring.authorized,
.ring.ready {
  background: currentColor;
}
.ring.ready::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.5px;
  width: 2.5px;
  height: 5px;
  border: solid var(--pp-fill);
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}
.bom {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  line-height: var(--text-mono-line);
}
.bom li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: center;
}
.bom .cmd {
  color: var(--color-on-passport-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bom .state {
  color: var(--color-on-passport-secondary);
}
.bom .state.is-ready {
  color: var(--color-on-passport);
}
.bom.wide li {
  grid-template-columns: 12px minmax(0, 12rem) minmax(0, 1fr) auto;
}
@media (max-width: 600px) {
  .bom.wide li {
    grid-template-columns: 12px minmax(0, 1fr) auto;
  }
  .bom.wide .cmd {
    display: none;
  }
}

/* Stamp: square to the grid. Machines do not tilt. */
.stamp {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  font-weight: var(--font-weight-semibold);
  border: 1.5px solid currentColor;
  border-radius: var(--radius-stamp);
  padding: 4px 10px;
  width: max-content;
  white-space: nowrap;
  transition:
    opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}
.stamp .when {
  font-weight: var(--font-weight-regular);
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--color-on-passport-secondary);
}

/* Compact passport inside Figure 1 */
.pp.travel {
  position: absolute;
  inset: 0 0 auto 0; /* height is the card's own; the slots mirror it */
  padding: var(--space-4) var(--space-5) var(--space-5);
  gap: var(--space-3);
  z-index: var(--z-raised);
  transform: translate(var(--dx, 0px), var(--dy, 0px));
  transition:
    transform var(--duration-hero) var(--ease-in-out),
    background-color var(--duration-base) var(--ease-out);
}
.pp.travel .pp-row {
  --passport-label-column: 7ch;
  gap: var(--space-3);
}
.pp.travel .pp-row dd {
  font-size: var(--text-mono-size);
}
.pp.travel .pp-foot {
  min-height: 26px;
  display: flex;
  align-items: center;
  gap: var(--space-3) var(--space-4);
  flex-wrap: wrap;
}
.handoff:not([data-state="ready"]):not([data-state="revoked"]) .pp.travel .stamp {
  opacity: 0;
  transform: scale(1.08);
}
.handoff[data-state="revoked"] .pp {
  --pp-fill: var(--color-passport-drained);
}
.handoff[data-state="revoked"] .strike,
.handoff[data-state="revoked"] .pp .stamp {
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
}
.pp-revoked {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--text-mono-size);
  line-height: var(--text-mono-line);
}
.handoff[data-state="revoked"] .pp-revoked {
  display: inline;
}
.controls {
  display: flex;
  gap: var(--space-3);
  align-items: center;
  flex-wrap: wrap;
}

/* ---------- Below the fold ---------- */
.section {
  padding: var(--space-16) 0;
  border-top: 1px solid var(--color-line);
}
.two {
  display: grid;
  grid-template-columns: minmax(0, var(--passport-max)) minmax(14rem, 1fr);
  gap: var(--space-12);
  align-items: start;
}
@media (max-width: 900px) {
  .two {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}
.pp.full {
  padding: var(--space-6) var(--space-8) var(--space-8);
  gap: var(--space-5);
  max-width: var(--passport-max);
}
@media (max-width: 600px) {
  .pp.full {
    padding: var(--space-5);
  }
}
.safety {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-4);
  font-size: var(--text-h3-size);
  line-height: var(--text-h3-line);
  font-weight: var(--font-weight-medium);
}
.safety li {
  display: grid;
  gap: 2px;
}
.safety .how {
  font-family: var(--font-mono);
  font-size: var(--text-caption-size);
  line-height: var(--text-caption-line);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-tertiary);
}

.lands {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}
@media (max-width: 700px) {
  .lands {
    grid-template-columns: 1fr;
  }
}
.lands .slot {
  min-height: 0;
  padding: var(--space-4) var(--space-5);
  display: grid;
  gap: var(--space-3);
  align-content: start;
}
.lands .slot.is-ready {
  border-style: solid;
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.lands .slot .label {
  color: inherit;
}
.lands .slot:not(.is-ready) .label {
  color: var(--color-text-tertiary);
}
.lands .mono {
  color: var(--color-text-secondary);
}

.again {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.paths {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.paths a {
  color: var(--color-text-secondary);
  text-decoration: none;
}
.paths a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

.site-footer {
  padding: var(--space-8) 0 var(--space-12);
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  color: var(--color-text-tertiary);
  font-size: var(--text-small-size);
  line-height: var(--text-small-line);
}
.site-footer a {
  color: var(--color-text-secondary);
}