/* ==========================================================================
   layout.css — bands, grid, section furniture, sticky nav, footer.
   Owned by the lead.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Bands
   -------------------------------------------------------------------------- */

.band {
  position: relative;
  padding-block: var(--band-y);
}

.band--tight { padding-block: var(--band-y-tight); }
.band--flush-top { padding-block-start: 0; }
.band--flush-bottom { padding-block-end: 0; }

.band__inner {
  inline-size: min(100%, var(--w-content));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band__inner--wide { inline-size: min(100%, var(--w-wide)); }
.band__inner--full { inline-size: 100%; }

/* A hairline seam between adjacent same-ground bands */
.band--seam { border-block-start: var(--hairline) solid var(--rule-c); }

/* --------------------------------------------------------------------------
   Section headers
   -------------------------------------------------------------------------- */

.sec-head {
  display: grid;
  gap: var(--s-5);
  margin-block-end: var(--s-12);
}

.sec-head__title { font-size: var(--fs-h2); max-width: 18ch; }
.sec-head__lead { font-size: var(--fs-lead); color: var(--fg-2); max-width: var(--measure); }

@media (min-width: 62rem) {
  .sec-head--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    column-gap: var(--s-16);
  }
  .sec-head--split .eyebrow { grid-column: 1 / -1; }
  .sec-head--split .sec-head__lead { padding-block-end: 0.35em; }
}

/* --------------------------------------------------------------------------
   Grid
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width: 48rem) {
  .grid { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--s-8); }
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-9 { grid-column: span 9; }
  .col-12 { grid-column: span 12; }
}

.cols-auto {
  display: grid;
  gap: var(--s-6);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}

/* --------------------------------------------------------------------------
   Cards / wells
   -------------------------------------------------------------------------- */

.card {
  background: var(--bg-2);
  border: var(--hairline) solid var(--rule-c);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}

.well {
  background: var(--bg-3);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}

/* --------------------------------------------------------------------------
   Sticky nav
   -------------------------------------------------------------------------- */

.nx {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--night) 82%, transparent);
  color: var(--snow);
  border-block-end: var(--hairline) solid transparent;
  transition: background-color var(--dur-3) var(--ease-out),
              border-color var(--dur-3) var(--ease-out);
}

@supports (backdrop-filter: blur(1px)) {
  .nx { backdrop-filter: saturate(160%) blur(14px); }
}

.nx[data-stuck='true'] {
  background: color-mix(in srgb, var(--night) 94%, transparent);
  border-block-end-color: var(--rule-night);
}

.nx__inner {
  inline-size: min(100%, var(--w-wide));
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-block-size: var(--nav-h, 56px);
  display: flex;
  align-items: center;
  gap: var(--s-5);
}

.nx__brand {
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
  text-decoration: none;
  flex: none;
  min-block-size: var(--tap);
  align-items: center;
}

.nx__wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.0625rem;
  color: var(--snow);
}

.nx__model {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: var(--snow-2);
}

.nx__links {
  display: none;
  flex: 1;
  min-inline-size: 0;
}

.nx__cta {
  margin-inline-start: auto;
  flex: none;
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

.nx__price {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--snow-2);
}

.nx__buy {
  min-block-size: 38px;
  padding: var(--s-2) var(--s-5);
  background: var(--snow);
  color: var(--night);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: background-color var(--dur-2) var(--ease-out);
}
.nx__buy:hover { background: var(--lcd); }

@media (min-width: 64rem) {
  .nx__links {
    display: flex;
    gap: clamp(var(--s-3), 1.4vw, var(--s-6));
    margin-inline-start: var(--s-8);
    overflow: hidden;
  }
  .nx__price { display: inline; }
}

.nx__link {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--snow-2);
  text-decoration: none;
  padding-block: var(--s-2);
  position: relative;
  white-space: nowrap;
  transition: color var(--dur-2) var(--ease-out);
}

.nx__link::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  block-size: 1px;
  background: var(--lcd);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}

.nx__link:hover,
.nx__link[aria-current='true'] { color: var(--snow); }
.nx__link[aria-current='true']::after { transform: scaleX(1); }

/* Reading-progress hairline */
.nx__progress {
  position: absolute;
  inset-inline: 0;
  inset-block-end: -1px;
  block-size: 2px;
  background: var(--lcd);
  transform: scaleX(var(--progress, 0));
  transform-origin: left;
  opacity: 0.85;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.ft { padding-block: var(--s-16) var(--s-12); }

.ft__grid {
  display: grid;
  gap: var(--s-10);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
}

.ft__h {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--fg-3);
  margin-block-end: var(--s-4);
}

.ft__list a {
  display: inline-flex;
  align-items: center;
  min-block-size: 34px;
  color: var(--fg-2);
  font-size: var(--fs-small);
  text-decoration: none;
}
.ft__list a:hover { color: var(--fg); text-decoration: underline; }

.ft__note {
  margin-block-start: var(--s-12);
  padding-block-start: var(--s-6);
  border-block-start: var(--hairline) solid var(--rule-c);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  line-height: 1.7;
  color: var(--fg-3);
  max-width: 88ch;
}

/* --------------------------------------------------------------------------
   Shared small parts
   -------------------------------------------------------------------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.3em 0.75em;
  border-radius: var(--r-pill);
  border: var(--hairline) solid var(--rule-c);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-2);
  white-space: nowrap;
}

.pill--live { border-color: color-mix(in srgb, var(--ok) 50%, var(--rule-c)); }

.dot {
  inline-size: 7px;
  block-size: 7px;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}
.dot--ok { background: var(--ok); }
.dot--alert { background: var(--alert-c); }

.figure__cap {
  margin-block-start: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  line-height: 1.6;
  color: var(--fg-3);
  max-width: 56ch;
}

/* Data rail: label/value pairs used across several sections */
.rail {
  display: grid;
  gap: 0;
  border-block-start: var(--hairline) solid var(--rule-c);
}

.rail__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--s-4);
  align-items: baseline;
  padding-block: var(--s-3);
  border-block-end: var(--hairline) solid var(--rule-c);
}

.rail__k {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-3);
}

.rail__v {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--fg);
}

/* Image that failed to load */
.img-fallback {
  display: grid;
  place-items: center;
  background: var(--bg-2);
  border: var(--hairline) dashed var(--rule-c);
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  text-align: center;
  padding: var(--s-6);
  min-block-size: 8rem;
  border-radius: var(--r-md);
}