@import url("tokens.css");

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

html,
body {
  margin: 0;
  overflow-x: clip;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur-base) var(--ease-out),
              color var(--dur-base) var(--ease-out);
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.028em;
  margin: 0;
  overflow-wrap: anywhere;
  min-width: 0;
}

a { color: inherit; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Skip link — visible only once focused */
.skip {
  position: absolute;
  top: var(--space-xs);
  left: var(--space-xs);
  z-index: var(--z-header);
  padding: var(--space-xs) var(--space-md);
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
  font-weight: 600;
  color: var(--color-chip-on-ink);
  background: var(--color-chip-on);
  border-radius: var(--radius);
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform var(--dur-base) var(--ease-out);
}

.skip:focus,
.skip:focus-visible { transform: translateY(0); }

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

.shell {
  width: min(100% - 2rem, 76rem);
  margin-inline: auto;
}

@media (min-width: 48rem) {
  .shell { width: min(100% - 4rem, 76rem); }
}

/* ── N6 minimal rail ─────────────────────────────────────────── */

.rail {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: color-mix(in oklch, var(--color-paper) 86%, transparent);
  backdrop-filter: blur(12px) saturate(1.3);
  border-bottom: var(--rule-hair) solid transparent;
  transition: border-color var(--dur-base) var(--ease-out);
}

.rail.is-stuck { border-bottom-color: var(--color-rule); }

.rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  min-height: var(--tap);
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.035em;
  text-decoration: none;
  min-width: 0;
  min-height: var(--tap);
}

.mark__glyph {
  flex: none;
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-accent-deep);
  color: var(--color-on-accent);
}

.mark__glyph svg { width: 1rem; height: 1rem; }
.mark__tail { color: var(--color-ink-3); font-weight: 600; }

.rail__end {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}

.rail__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  padding-inline: var(--space-xs);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-2);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}

.rail__link:hover { color: var(--color-accent-ink); }

.theme-toggle {
  flex: none;
  display: grid;
  place-items: center;
  width: var(--tap);
  height: var(--tap);
  padding: 0;
  color: var(--color-ink-2);
  background: none;
  border: 0;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}

.theme-toggle:hover {
  color: var(--color-accent-ink);
  background: var(--color-paper-3);
}

.theme-toggle svg {
  grid-area: 1 / 1;
  width: 1.15rem;
  height: 1.15rem;
  transition: opacity var(--dur-base) var(--ease-out-quart),
              transform var(--dur-slow) var(--ease-out-quint);
}

/* Sun is the resting state; moon is parked rotated-out until dark wins. */
.theme-toggle .icon-moon { opacity: 0; transform: rotate(90deg) scale(0.5); }
.theme-toggle .icon-sun { opacity: 1; transform: none; }

:root[data-theme="dark"] .theme-toggle .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
:root[data-theme="dark"] .theme-toggle .icon-moon { opacity: 1; transform: none; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { opacity: 0; transform: rotate(-90deg) scale(0.5); }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { opacity: 1; transform: none; }
}

/* ── Head ────────────────────────────────────────────────────── */

.head {
  position: relative;
  isolation: isolate;
  padding-block: var(--space-2xl) var(--space-xl);
  overflow: clip;
}

.head::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto -10%;
  height: 34rem;
  z-index: var(--z-below);
  background:
    radial-gradient(45rem 22rem at 18% 30%, var(--glow-a), transparent 68%),
    radial-gradient(34rem 20rem at 82% 12%, var(--glow-b), transparent 70%);
  pointer-events: none;
}

/* One entrance, on load only. No scroll-triggered section reveals anywhere on this
 * page — per-section fade-and-rise is the tell, not choreography. Keyframes run from
 * hidden to the element's natural state, so if animation never fires (reduced motion,
 * headless render, old browser) the content is simply already visible. */
@keyframes enter-rise {
  from { opacity: 0; transform: translateY(10px); }
}

@keyframes wipe-in {
  from { clip-path: inset(0 100% 0 0); }
  to { clip-path: inset(0 -0.1em 0 0); }
}

.head__title,
.head__lede,
.head__facts,
.controls__inner {
  animation: enter-rise var(--dur-enter) var(--ease-out) backwards;
}

.head__lede { animation-delay: 70ms; }
.head__facts { animation-delay: 140ms; }
.controls__inner { animation-delay: 200ms; }

.head__title {
  font-size: var(--text-display);
  line-height: 0.98;
  max-width: 15ch;
  text-wrap: balance;
}

.head__title em {
  font-style: normal;
  color: var(--color-accent-ink);
  /* Signature moment: the promise wipes in rather than fading like everything else. */
  display: inline-block;
  animation: wipe-in 620ms var(--ease-out) 260ms backwards;
}

.head__lede {
  margin: var(--space-lg) 0 0;
  max-width: 56ch;
  color: var(--color-ink-2);
  font-size: var(--text-lg);
}

.head__facts {
  margin: var(--space-lg) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-ink-3);
}

.head__facts li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.head__facts li::before {
  content: "";
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 50%;
  background: var(--color-accent);
}

.head__facts strong {
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

/* ── Controls ────────────────────────────────────────────────── */

.controls {
  position: sticky;
  top: 3.5rem;
  z-index: var(--z-sticky);
  padding-block: var(--space-sm);
  /* Opaque on purpose: this bar sits directly beneath the already-blurred rail,
   * and two stacked backdrop-filter layers is the classic low-end-mobile jank source. */
  background: var(--color-paper);
  border-bottom: var(--rule-hair) solid var(--color-rule-soft);
}

.controls__inner {
  display: grid;
  gap: var(--space-xs);
}

@media (min-width: 52rem) {
  .controls__inner {
    grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-lg);
  }
}

.search {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 0;
}

.search > svg {
  position: absolute;
  left: var(--space-sm);
  width: 1.05rem;
  height: 1.05rem;
  color: var(--color-ink-3);
  pointer-events: none;
}

.search input {
  width: 100%;
  min-width: 0;
  min-height: var(--tap);
  font: inherit;
  font-size: var(--text-base);
  color: var(--color-ink);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  padding: 0.6rem 2.6rem 0.6rem 2.4rem;
  box-shadow: var(--shadow-rest);
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.search input::placeholder { color: var(--color-ink-3); }
.search input:hover { border-color: var(--color-accent-deep); }
.search input:focus-visible {
  border-color: var(--color-focus);
  box-shadow: 0 0 0 3px var(--ring-halo);
}
.search input::-webkit-search-cancel-button { cursor: pointer; }

.search__kbd {
  position: absolute;
  right: 0.6rem;
  display: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1;
  color: var(--color-ink-3);
  background: var(--color-paper-3);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.45rem;
  pointer-events: none;
}

@media (min-width: 52rem) and (hover: hover) {
  .search__kbd { display: block; }
}

.filters {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-xs);
  overflow-x: auto;
  scrollbar-width: none;
  margin-inline: calc(-1 * var(--space-xs));
  padding-inline: var(--space-xs);
}

.filters::-webkit-scrollbar { display: none; }

/* Fade the edge the rail can still scroll toward, so hidden categories read as hidden. */
.filters.can-scroll-right {
  mask-image: linear-gradient(to right, #000 calc(100% - 2.5rem), transparent 100%);
}

.filters.can-scroll-left {
  mask-image: linear-gradient(to right, transparent 0, #000 2.5rem);
}

.filters.can-scroll-left.can-scroll-right {
  mask-image: linear-gradient(
    to right,
    transparent 0, #000 2.5rem,
    #000 calc(100% - 2.5rem), transparent 100%
  );
}

@media (min-width: 52rem) {
  .filters { flex-wrap: wrap; overflow: visible; justify-content: flex-end; }
}

.chip {
  flex: none;
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-2);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  padding-inline: var(--space-md);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out);
}

@media (min-width: 52rem) {
  .chip { min-height: 2.125rem; padding-inline: 0.85rem; }
}

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

.chip[aria-pressed="true"] {
  color: var(--color-chip-on-ink);
  background: var(--color-chip-on);
  border-color: var(--color-chip-on);
}

.chip:active { transform: translateY(1px); }

/* ── Segments ────────────────────────────────────────────────── */

.segments { padding-block: var(--space-xl) var(--space-3xl); }

/* Composed HERE, not in tokens.css: var() inside a custom property is substituted at
 * the declaring element, and --seg-hue is set inline on .segment. */
.segment {
  scroll-margin-top: 7rem;
  --seg-wash: oklch(var(--seg-wash-l) var(--seg-wash-c) var(--seg-hue, 200));
  --seg-fg: oklch(var(--seg-fg-l) var(--seg-fg-c) var(--seg-hue, 200));
  --seg-edge: oklch(var(--seg-edge-l) var(--seg-edge-c) var(--seg-hue, 200));
  --seg-rule: oklch(var(--seg-rule-l) var(--seg-rule-c) var(--seg-hue, 200) / var(--seg-rule-a));
  --seg-bar: oklch(var(--seg-bar-l) var(--seg-bar-c) var(--seg-hue, 200));
}
.segment + .segment { margin-top: var(--space-2xl); }
.segment[hidden] { display: none !important; }

.segment__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}

.segment__title {
  font-size: var(--text-2xl);
  line-height: 1.1;
  color: var(--color-ink);
}

.segment__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  font-variant-numeric: tabular-nums;
}

.segment__rule {
  flex: 1;
  height: var(--rule-hair);
  background: linear-gradient(to right, var(--seg-rule), transparent);
  min-width: 1.5rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.grid > li { min-width: 0; display: flex; }

@keyframes card-in {
  from { opacity: 0; transform: translateY(10px); }
}

/* Only present when the visible set actually changed (category switch, clear, first
 * paint) — never on every search keystroke, which would re-stagger on each letter. */
.grid.is-restagger > li {
  animation: card-in 400ms var(--ease-out-quart) backwards;
  animation-delay: calc(var(--i, 0) * var(--stagger));
}

.card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-width: 0;
  width: 100%;
  padding: var(--space-lg);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-rest);
  text-decoration: none;
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}

.card::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: 2px;
  background: var(--seg-bar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow) var(--ease-out);
}

.card:hover::before,
.card:focus-visible::before,
.card.is-hover::before { transform: scaleX(1); }

.card:hover,
.card.is-hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: var(--seg-edge);
}

.card:active { transform: translateY(-1px); }

.card__top {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
}

.card__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: var(--seg-wash);
  color: var(--seg-fg);
}

.card__icon svg { width: 1.15rem; height: 1.15rem; }

.card__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.025em;
  min-width: 0;
  overflow-wrap: anywhere;
}

.card__desc {
  margin: 0;
  color: var(--color-ink-2);
  font-size: var(--text-body);
  line-height: 1.5;
  flex: 1;
  max-width: 60ch;
}

.card__note {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-2);
  background: var(--color-paper-3);
  border-radius: var(--radius-sm);
  padding: var(--space-xs) var(--space-sm);
  overflow-wrap: anywhere;
}

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
  padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule-soft);
}

.card__host {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.card__go {
  flex: none;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--seg-fg);
  transition: transform var(--dur-base) var(--ease-out);
}

.card:hover .card__go { transform: translateX(2px); }
.card--download:hover .card__go { transform: translateY(2px); }

/* Download cards state platform, version and size up front, and still show the
 * host they hand off to — these links leave the site for the file store. */
.card__specs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2xs) var(--space-xs);
  font-size: var(--text-xs);
  color: var(--color-ink-2);
  font-variant-numeric: tabular-nums;
}

.card__platform {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.45rem;
  font-weight: 700;
  color: var(--seg-fg);
  background: var(--seg-wash);
  border-radius: var(--radius-sm);
}

.card__specs .sep { color: var(--color-ink-3); }

@keyframes empty-in {
  from { opacity: 0; transform: scale(0.98); }
}

.empty {
  animation: empty-in var(--dur-slow) var(--ease-out-quart) backwards;
  color: var(--color-ink-2);
  border: var(--rule-hair) dashed var(--color-rule);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}

.empty button {
  font: inherit;
  font-weight: 600;
  min-height: var(--tap);
  padding-inline: var(--space-xs);
  color: var(--color-accent-ink);
  background: none;
  border: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ── Ft5 statement ───────────────────────────────────────────── */

.foot {
  border-top: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
  padding-block: var(--space-2xl);
}

.foot__statement {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.025em;
  max-width: 32ch;
  margin: 0;
}

.foot__meta {
  margin: var(--space-md) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs) var(--space-md);
  align-items: center;
  font-size: var(--text-sm);
  color: var(--color-ink-3);
}

.foot__meta a {
  display: inline-flex;
  align-items: center;
  min-height: var(--tap);
  padding-inline: var(--space-2xs);
  color: var(--color-ink-2);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.foot__meta a:hover { color: var(--color-accent-ink); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
  .card:hover { transform: none; }
}