/* Hallmark · pre-emit critique: P5 H5 E5 S4 R5 V4
 * · contrast: pass (40-41) · nav: N3 · footer: Ft4 · slop: pass (42-45)
 * · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30)
 * · mobile: pass (34, 49, 50-57)
 */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  overflow-x: clip;
  scroll-behavior: smooth;
}

body {
  overflow-x: clip;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  font-weight: 400;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-style: normal;
  line-height: 1.15;
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

code {
  font-family: var(--font-mono);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- */
/* N3 · Side-rail nav — horizontal top bar at all widths            */
/* ---------------------------------------------------------------- */

.nav-rail {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
  overflow-x: auto;
  overflow-y: hidden;
}

.nav-rail .wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-md);
  white-space: nowrap;
  text-decoration: none;
  flex-shrink: 0;
}

.rail-dots {
  list-style: none;
  display: flex;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
}

.rail-dots a {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  text-decoration: none;
  white-space: nowrap;
  font-size: var(--text-xs);
  color: var(--color-muted);
  padding-block: var(--space-2xs);
}

.rail-dots .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--color-rule);
  flex-shrink: 0;
  transition: background var(--dur-short) var(--ease-out);
}

.rail-dots a:hover .dot,
.rail-dots a:focus-visible .dot {
  background: var(--color-accent);
}

/* ---------------------------------------------------------------- */
/* Masthead — brand mark + tagline only (Catalogue: no big display)  */
/* ---------------------------------------------------------------- */

.masthead {
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  max-width: 56rem;
}

.masthead-tagline {
  font-size: var(--text-brand);
  max-width: 20ch;
  margin-block-end: var(--space-md);
}

.masthead-sub {
  color: var(--color-muted);
  max-width: 62ch;
  font-size: var(--text-md);
  margin-block-end: var(--space-xl);
}

/* ---------------------------------------------------------------- */
/* Controls — search + category chips                               */
/* ---------------------------------------------------------------- */

.controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.search-field {
  display: block;
}

#skill-search {
  width: 100%;
  max-width: 28rem;
  font-family: var(--font-body);
  font-size: var(--text-md);
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-bottom: 1px solid var(--color-rule);
  background: transparent;
  color: var(--color-ink);
}

#skill-search::placeholder {
  color: var(--color-neutral);
}

#skill-search:focus-visible {
  border-bottom-color: var(--color-accent);
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: 0;
  padding: 0;
}

.chip {
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: var(--text-xs);
  white-space: nowrap;
  background: transparent;
  border: 1px solid var(--color-rule);
  color: var(--color-muted);
  padding: var(--space-2xs) var(--space-sm);
  border-radius: 999px;
  cursor: pointer;
  transition:
    border-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out);
}

.chip:hover {
  border-color: var(--color-neutral);
  color: var(--color-ink);
}

.chip:active {
  border-color: var(--color-accent-2);
  color: var(--color-accent-2);
}

.chip.is-active {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.chip:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.chip-count {
  color: var(--color-neutral);
}

.chip.is-active .chip-count {
  color: var(--color-accent-2);
}

.empty-state {
  margin-block-start: var(--space-xl);
  color: var(--color-muted);
  font-style: italic;
}

/* ---------------------------------------------------------------- */
/* Catalogue bands — S4 inline head + hairline rule + card grid      */
/* ---------------------------------------------------------------- */

.band {
  padding: var(--space-xl) var(--space-md);
  border-top: 1px solid var(--color-rule);
}

.band-head {
  max-width: 48rem;
  margin-block-end: var(--space-lg);
}

.band-intro {
  font-size: var(--text-md);
  color: var(--color-muted);
}

.head-inline {
  font-variant-caps: all-small-caps;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--color-ink);
  font-family: var(--font-body);
}

.catalogue-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-2xs);
}

.card {
  position: relative;
  padding: var(--space-md);
  border: 1px solid var(--color-rule);
  background: var(--color-paper-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  transition: transform var(--dur-short) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
  .card:hover {
    transform: translateY(-2px);
  }
}

.card-num {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.card-title {
  font-size: var(--text-md);
  font-family: var(--font-display);
}

.card-desc {
  color: var(--color-muted);
  font-size: var(--text-sm);
  flex-grow: 1;
}

.card-id {
  font-size: var(--text-xs);
  color: var(--color-neutral);
  border-top: 1px solid var(--color-rule);
  padding-block-start: var(--space-xs);
}

.card[hidden] {
  display: none;
}

/* ---------------------------------------------------------------- */
/* Ft4 · Dense typographic footer                                    */
/* ---------------------------------------------------------------- */

.foot-dense {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
  border-top: 1px solid var(--color-rule);
  padding: var(--space-xl) var(--space-md) var(--space-2xl);
  max-width: 64rem;
}

.foot-links {
  margin-block-start: var(--space-md);
  display: flex;
  gap: var(--space-md);
}

.foot-links a {
  color: var(--color-accent);
  text-decoration: none;
  white-space: nowrap;
}

.foot-links a:hover {
  text-decoration: underline;
}

/* ---------------------------------------------------------------- */
/* Motion — one orchestrated page-load reveal                        */
/* ---------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(8px);
  animation: reveal var(--dur-long) var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 60ms);
}

@keyframes reveal {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
  .reveal {
    animation: reveal-reduced 150ms linear forwards;
  }
  @keyframes reveal-reduced {
    to {
      opacity: 1;
      transform: none;
    }
  }
  .card:hover {
    transform: none;
  }
}