/* ===========================================================
 * WIP Computer Homepage v03 static hardening
 * White. Monochrome. One sans. No chrome.
 * =========================================================== */

:root {
  --bg: #ffffff;
  --fg: #111111;
  --fg-soft: #444444;
  --fg-muted: #6b6b6b;
  --border: #ececec;
  --link: #111111;
  --link-soft: #6b6b6b;
  --accent: #0033ff;
  --accent-hover: #0029cc;
  --content: 680px;
  --content-wide: 1040px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { overflow-x: hidden; }
body { overflow-x: clip; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 200ms ease;
}
a:hover { opacity: 0.65; }

/* ---------- Shell ---------- */
.shell {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 24px;
}
.shell--wide {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 10;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, backdrop-filter 220ms ease, border-color 220ms ease;
}
.site-header.is-scrolled {
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: rgba(0, 0, 0, 0.06);
}
.site-header__inner {
  margin: 0;
  padding: 0 20px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-header__brand {
  display: inline-flex; align-items: center; gap: 6px;
  flex: 0 0 auto;
  color: #1a1a1a;
  text-decoration: none;
}
.site-header__sprite {
  display: inline-block;
  width: 28px;
  height: 28px;
  overflow: hidden;
  flex: 0 0 auto;
}
.site-header__sprite > div {
  width: 100%;
  height: 100%;
}
.site-header__wordmark {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1;
  color: #1a1a1a;
  text-transform: uppercase;
  margin-left: -2px;
}

@media (max-width: 720px) {
  .site-header__inner { padding: 0 16px; gap: 16px; height: 55px; }
}

.site-header__cta {
  flex: 0 0 auto;
  opacity: 0;
  pointer-events: none;
  transition: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 20px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background 180ms ease, border-color 180ms ease, opacity 180ms ease;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); opacity: 1; }
.btn--sm { padding: 9px 16px; font-size: 13px; }

.link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg);
}
.link:hover { opacity: 0.65; }
/* ---------- Products reveal (gated by letter "Explore the architecture") ---------- */
/* The reveal snaps open instantly so scroll anchoring works like a normal
   anchor link. Only opacity fades in. */
.products-wrap {
  display: none;
  opacity: 0;
  transition: opacity 280ms ease;
  scroll-margin-top: 24px;
}
.products-wrap.is-open {
  display: block;
  opacity: 1;
}
.products-wrap__inner {}

/* ---------- Hero ---------- */
.hero {
  --bucky-responsive-lift: 0px;
  position: relative;
  padding: 120px 0 88px;
  text-align: center;
  overflow: visible;
  touch-action: pan-y;
  user-select: none;
}
.hero.is-bucky-readout-on {
  touch-action: none;
}
.hero__bg-clip {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}
.hero.is-dragging {
  cursor: grabbing;
}
@media (hover: hover) and (pointer: fine) {
  .hero {
    cursor: grab;
  }
}

/* ---------- Bucky drag/position readout ---------- */
.bucky-readout {
  position: absolute;
  bottom: -130px;
  right: 24px;
  z-index: 50;
  min-width: 120px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--fg-soft);
  font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  user-select: text;
}
.bucky-readout__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.bucky-readout__row span {
  color: var(--fg-muted);
}
.bucky-readout__row b {
  color: var(--fg);
  font-weight: 600;
}
.bucky-readout__sep {
  height: 1px;
  margin: 6px -12px;
  background: var(--border);
}
.bucky-readout__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 3px;
  margin: 3px 0 4px;
}
.bucky-readout__btn {
  padding: 5px 0;
  border: 0;
  background: rgba(0, 0, 0, 0.04);
  color: var(--fg-soft);
  cursor: pointer;
  font: inherit;
  font-size: 10px;
  font-weight: 600;
  transition: background 120ms ease, color 120ms ease;
}
.bucky-readout__btn:hover {
  background: rgba(0, 47, 167, 0.10);
  color: var(--accent);
}
.bucky-readout__btn.is-active {
  background: var(--accent);
  color: #fff;
}
.bucky-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 100;
  padding: 9px 14px;
  background: rgba(17, 17, 17, 0.92);
  color: #fff;
  font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  letter-spacing: 0.02em;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 220ms ease, transform 220ms ease;
}
.bucky-toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}
@media (max-width: 720px) {
  .bucky-readout {
    left: 16px;
    right: 16px;
    bottom: -154px;
  }
}
.hero > .shell {
  position: relative;
  z-index: 2;
  max-width: var(--content-wide);
}
.hero__bg {
  position: absolute;
  top: 50%;
  left: 50%;
  width: auto;
  height: auto;
  max-width: none;
  max-height: none;
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg);
  transform-origin: center center;
  transition: opacity 700ms ease;
  pointer-events: none;
  z-index: 0;
}
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.75rem, 6.5vw, 5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin: 0 0 24px;
  text-wrap: balance;
  min-height: 2.2em;
}
.hero__line {
  display: block;
  min-height: 1.1em;
  white-space: nowrap;
}
.hero__slot {
  position: relative;
  display: inline-grid;
  text-align: center;
  vertical-align: baseline;
}
.hero__ghost {
  grid-area: 1 / 1;
  visibility: hidden;
  display: inline-block;
  white-space: nowrap;
}
.hero__ghost::before {
  content: attr(data-hero-ghost-text);
}
.hero__typed {
  grid-area: 1 / 1;
  position: relative;
  text-align: center;
  white-space: nowrap;
  --hero-caret-x: 0px;
}
.hero__line--em em,
.hero__line--em .hero__ghost::before {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--fg);
}
.hero__caret {
  position: absolute;
  left: 50%;
  top: 0.12em;
  display: block;
  width: 1px;
  height: 0.85em;
  background: currentColor;
  transform: translateX(var(--hero-caret-x));
  animation: hero-caret-blink 1.2s infinite;
}
.hero__caret[hidden] {
  display: none;
}
.hero__caret.is-calm {
  animation: hero-caret-pulse 2.6s ease-in-out infinite;
}
@keyframes hero-caret-blink {
  0%, 49%   { opacity: 1; }
  50%, 100% { opacity: 0; }
}
.hero__caret--ghost {
  display: none;
  animation: none;
}
@keyframes hero-caret-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.28; }
}
@media (prefers-reduced-motion: reduce) {
  .hero__caret { animation: none; opacity: 1; }
}
.hero__sub {
  max-width: 560px;
  margin: 0 auto 40px;
  font-size: 18px;
  line-height: 1.5;
  color: var(--fg-soft);
  text-wrap: pretty;
}
.hero__ctas {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .hero {
    padding: 120px 0 88px;
    overflow: hidden;
  }
  .hero .shell {
    padding: 0 12px;
  }
  .hero__title {
    font-size: 2.65rem;
  }
  .hero__sub {
    font-size: 17px;
  }
  .hero__ctas {
    gap: 16px;
  }
}
@media (max-width: 900px) {
  .hero {
    overflow: hidden;
  }
  .hero__title {
    font-size: 3.2rem;
  }
  .hero__ctas {
    flex-direction: column;
    gap: 16px;
  }
}
@media (max-width: 480px) {
  .hero__title {
    font-size: 2.65rem;
  }
}

/* ---------- Section ---------- */
.section {
  padding: 96px 0;
}
.section + .section {
  border-top: 1px solid var(--border);
}
#letter.section {
  padding-top: 56px;
  scroll-margin-top: 32px;
}

.letter {
  max-width: var(--content);
  margin: 0 auto;
}
.letter__meta {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 28px;
}
.letter__title {
  font-family: var(--font-sans);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0 0 36px;
  white-space: nowrap;
}
@media (max-width: 720px) {
  .letter__title {
    font-size: 1.25rem;
    white-space: normal;
  }
}
@media (max-width: 900px) {
  .letter__title {
    font-size: 1.35rem;
    white-space: normal;
  }
}
@media (max-width: 480px) {
  .letter__title {
    font-size: 1.25rem;
  }
}
.letter__lede {
  font-size: 20px;
  line-height: 1.45;
  color: var(--fg);
  font-weight: 500;
  margin: 0 0 28px;
  text-wrap: pretty;
}
.letter p {
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg-soft);
  margin: 0 0 22px;
  text-wrap: pretty;
}
.letter p strong {
  color: var(--fg);
  font-weight: 600;
}
.letter__inline-link {
  color: var(--accent);
  border-bottom: 1px solid currentColor;
  transition: color 180ms ease;
}
.letter__inline-link:hover { color: var(--accent-hover); opacity: 1; }
.letter__questions {
  list-style: disc;
  padding-left: 22px;
  margin: 0 0 28px;
  color: var(--fg-soft);
}
.letter__questions li {
  font-size: 17px;
  line-height: 1.65;
  margin-bottom: 8px;
}
.letter__questions li::marker {
  color: var(--fg-muted);
}
.letter__walkthrough {
  list-style: decimal;
  padding-left: 22px;
  margin: 0 0 28px;
  color: var(--fg-soft);
}
.letter__walkthrough li {
  font-size: 17px;
  line-height: 1.65;
  margin-bottom: 8px;
}
.letter__walkthrough li::marker {
  color: var(--fg-muted);
}
.letter__sign {
  margin: 40px 0 28px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-soft);
}
.letter__sign .name {
  color: var(--fg);
  font-weight: 500;
}
.letter__cta {
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.letter__cta-explore {
  font-size: 14px;
  color: var(--fg-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 180ms ease;
}
.letter__cta-explore:hover { color: var(--fg); opacity: 1; }
.letter__cta-explore span { transition: transform 220ms ease; display: inline-block; }
.letter__cta-explore:hover span { transform: translateY(1px); }

/* ---------- Products ---------- */
.products {
  max-width: var(--content-wide);
  margin: 0 auto;
}
.products__head {
  margin: 0 0 56px;
  text-align: left;
  position: relative;
  padding-right: 44px;
}
.products__close {
  position: absolute;
  /* Align the close control with the title cap-line. */
  top: 0;
  right: 0;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: flex-start;
  justify-content: center;
  background: transparent;
  border: 0;
  padding: 4px 0 0;
  cursor: pointer;
  color: var(--fg-muted);
  transition: color 180ms ease, transform 180ms ease;
}
.products__close:hover { color: var(--fg); transform: rotate(90deg); }
.products__title {
  font-size: clamp(1.75rem, 3.4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0 0 12px;
  text-wrap: balance;
}
.products__sub {
  font-size: 17px;
  line-height: 1.55;
  color: var(--fg-soft);
  margin: 0;
}
.products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 56px;
  row-gap: 40px;
}
@media (max-width: 720px) {
  .products__grid {
    grid-template-columns: 1fr;
    row-gap: 32px;
  }
}
.product {
  padding: 0;
}
.product__name {
  font-size: 17px;
  font-weight: 600;
  color: var(--fg);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.product__desc {
  font-size: 15px;
  line-height: 1.55;
  color: var(--fg-soft);
  margin: 0;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 0 0 32px;
}
.site-footer__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 48px 24px 0;
}
.site-footer__cols {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: 48px;
  padding-bottom: 40px;
  align-items: start;
  border-top: 1px solid var(--border);
  padding-top: 48px;
  margin-top: -48px;
}
.site-footer__col-group {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.site-footer__brand-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-footer__col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 14px;
}
.site-footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer__col a {
  font-size: 13px;
  color: var(--fg-muted);
  text-decoration: none;
}
.site-footer__col a:hover { color: var(--fg); opacity: 1; }
.site-footer__link-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.site-footer__link-icon {
  display: inline-flex;
  width: 14px;
  height: 14px;
  align-items: center;
  justify-content: center;
  color: var(--fg-muted);
}
.site-footer__link-with-icon:hover .site-footer__link-icon { color: var(--fg); }
.site-footer__brand-line {
  font-size: 13px;
  color: var(--fg);
}
@media (max-width: 960px) {
  .site-footer__cols { gap: 32px; }
}
@media (max-width: 720px) {
  .site-footer__cols {
    grid-template-columns: 1fr;
    grid-auto-flow: row;
    gap: 24px;
  }
  .site-footer__col-group { gap: 24px; }
  .site-footer__brand-col,
  .site-footer__col-group:nth-of-type(1),
  .site-footer__col-group:nth-of-type(2),
  .site-footer__col-group:nth-of-type(3) {
    grid-column: 1;
    grid-row: auto;
    justify-self: start;
  }
}
.site-footer__brand-name {
  font-size: 13px;
  color: var(--fg);
  font-weight: 500;
}
.site-footer__brand-tag {
  font-size: 13px;
  color: var(--fg-muted);
}
.site-footer__agent {
  font-size: 13px;
  color: var(--fg-muted);
  text-decoration: none;
}
.site-footer__agent:hover { color: var(--fg); opacity: 1; }
.site-footer__passkeys {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  font-size: 13px;
  color: var(--fg-muted);
  cursor: pointer;
  transition: color 180ms ease;
}
.site-footer__passkeys:hover { color: var(--fg); }
.site-footer__passkeys-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #c9433a;
  display: inline-block;
  transition: background 200ms ease;
}
.site-footer__passkeys.is-on .site-footer__passkeys-dot {
  background: #2f7a5a;
}
.site-footer__passkeys-label {
  position: relative;
  display: inline-block;
}
.site-footer__passkeys-label > [data-passkeys-label] {
  position: absolute;
  left: 0;
  top: 0;
  white-space: nowrap;
}
.site-footer__passkeys-ghost {
  visibility: hidden;
  white-space: nowrap;
}
.site-footer__passkeys-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-footer__info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--fg-muted);
  transition: color 180ms ease;
}
.site-footer__info:hover { color: var(--fg); }
.site-footer__info-wrap {
  position: relative;
  display: inline-flex;
}
.site-footer__info-popover {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  --shift: 0px;
  transform: translateX(calc(-50% + var(--shift))) translateY(4px);
  width: min(240px, calc(100vw - 32px));
  padding: 10px 12px;
  background: var(--fg);
  color: var(--bg);
  font-size: 12px;
  line-height: 1.45;
  text-align: left;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 20;
  white-space: normal;
}
.site-footer__info-popover::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(calc(-50% - var(--shift)));
  border: 5px solid transparent;
  border-top-color: var(--fg);
}
.site-footer__info[aria-expanded="true"] + .site-footer__info-popover {
  opacity: 1;
  transform: translateX(calc(-50% + var(--shift))) translateY(0);
}

.site-footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--fg-muted);
}
.site-footer__bottom .right { margin-left: auto; display: flex; gap: 20px; align-items: center; }
.site-footer__bottom .right a { color: var(--fg-muted); text-decoration: none; }
.site-footer__bottom .right a:hover { color: var(--fg); opacity: 1; }
/* The Tools column hosts the passkeys button on its own row, no inline label/separator. */

@media (max-width: 720px) {
  .site-footer__top { flex-direction: column; gap: 24px; }
}

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