/* quavernos.css — the QuavernOS surface at /quavernos.
 * Reuses the coming-soon scaffold (coming-nav, coming-footer) and the Quavern
 * material language: limestone field, rail ink, hard rules, Lineal display,
 * Atkinson copy. Amber appears only as one small active-development contact.
 */

.qos-hero {
  display: grid;
  gap: var(--space-5);
  align-content: end;
  min-height: 68svh;
  padding: clamp(9rem, 20vh, 13rem) clamp(var(--space-4), 4vw, var(--space-8)) clamp(var(--space-8), 9vh, var(--space-9));
  border-bottom: var(--border-heavy) solid var(--color-ink);
}

.qos-kicker {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink-soft);
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.qos-contact {
  width: var(--space-3);
  height: var(--space-3);
  flex: 0 0 auto;
  background: var(--color-contact);
}

.qos-title {
  max-width: 15ch;
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5rem);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 0.9;
  overflow-wrap: normal;
  word-break: keep-all;
}

.qos-deck {
  max-width: 54ch;
  color: var(--color-ink-soft);
  font-size: var(--step-1);
  line-height: 1.45;
}

.qos-band {
  padding: clamp(var(--space-8), 9vw, var(--space-10)) clamp(var(--space-4), 4vw, var(--space-8));
  border-bottom: var(--border-thin) solid var(--color-ink);
}

.qos-band-inner {
  display: grid;
  grid-template-columns: minmax(9rem, 3fr) minmax(0, 9fr);
  gap: clamp(var(--space-6), 6vw, var(--space-9));
}

.qos-band-title {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: var(--line-heading);
}

.qos-prose {
  display: grid;
  gap: var(--space-5);
  max-width: var(--reading-max);
  min-width: 0;
}

.qos-prose p {
  font-size: var(--step-0);
  line-height: var(--line-body);
  color: var(--color-ink);
}

.qos-downloads {
  padding: clamp(var(--space-8), 9vw, var(--space-10)) clamp(var(--space-4), 4vw, var(--space-8));
}

.qos-downloads-inner {
  display: grid;
  gap: clamp(var(--space-6), 5vw, var(--space-8));
}

.qos-downloads-head {
  display: grid;
  gap: var(--space-4);
}

.qos-downloads-head h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: var(--line-heading);
}

.qos-downloads-head p {
  max-width: var(--reading-max);
  color: var(--color-ink-soft);
  font-size: var(--step-0);
  line-height: var(--line-body);
}

.qos-build-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.qos-build {
  display: grid;
  gap: var(--space-5);
  align-content: start;
  padding: clamp(var(--space-5), 4vw, var(--space-7));
  background: var(--color-paper-raised);
  border: var(--border-thin) solid var(--color-ink);
  border-radius: var(--radius-cut);
}

.qos-build-arch {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.qos-build h3 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1;
}

.qos-build-tag {
  flex: 0 0 auto;
  color: var(--color-ink-soft);
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.qos-build-note {
  color: var(--color-ink-soft);
  font-size: var(--step-0);
  line-height: 1.5;
}

.qos-build-versions {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding-block-start: var(--space-4);
  border-block-start: var(--border-thin) solid var(--color-ink-soft);
}

.qos-build-version {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.qos-build-version dt {
  color: var(--color-ink-soft);
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.qos-build-version dd {
  margin: 0;
  color: var(--color-ink);
  font-size: var(--step-0);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.qos-build-action {
  justify-self: start;
  display: inline-flex;
  min-height: var(--control-height);
  align-items: center;
  padding-inline: var(--space-5);
  border: var(--border-heavy) solid var(--color-ink-soft);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--step--1);
  font-weight: 800;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  cursor: not-allowed;
}

a.qos-build-action {
  text-decoration: none;
}

.qos-build-action--ready {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-paper);
  cursor: pointer;
}

@media (hover: hover) and (pointer: fine) {
  .qos-build-action--ready:hover {
    background: var(--color-depth);
    color: var(--color-depth-text);
  }
}

.qos-notify {
  color: var(--color-ink-soft);
  font-size: var(--step-0);
  line-height: 1.5;
}

.qos-notify a {
  color: var(--color-ink);
  font-weight: 800;
  text-decoration-color: currentColor;
  text-decoration-line: underline;
  text-decoration-thickness: var(--border-heavy);
  text-underline-offset: 0.14em;
  white-space: nowrap;
}

.qos-notify .coming-contact-arrow {
  display: inline-block;
  transition: transform var(--dur-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .qos-notify a:hover .coming-contact-arrow {
    transform: translate(0.18em, -0.18em);
  }
}

@media (max-width: 52rem) {
  .qos-band-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-6);
  }

  .qos-build-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 42rem) {
  .qos-hero {
    min-height: auto;
    padding-block-start: clamp(8rem, 26vh, 11rem);
  }

  .qos-title {
    font-size: clamp(2.75rem, 13vw, 4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .qos-notify .coming-contact-arrow {
    transition-duration: 0.01ms;
  }
}