/* ==========================================================================
   ENDLESS BELOW — pixel UI
   --------------------------------------------------------------------------
   Custom Aseprite chrome. Source canvas is 24×24; the slice grid is 8×8.

   9-slice (full 3×3): borders, buttons
   3-slice (middle row only, y = 8–15): divider, pointer, tabs
     Implemented as border-image with top/bottom width 0 so the empty
     rows never add space, and height locked to 8×scale so the caps
     are never stretched vertically.

   Filenames on disk contain spaces (`borders 9-sl.png`); URLs are encoded
   in css/variables.css.
   ========================================================================== */

@font-face {
  font-family: "Hollow Crown";
  src: url("../assets/fonts/font.ttf") format("truetype");
  font-display: swap;
}

.pixel-crisp,
.pixel-border,
.pixel-button,
.pixel-tab,
.pixel-divider,
.pixel-pointer,
.pixel-icon,
.hero__scroll-arrow,
.btn,
.site-nav__link,
.filter-btn,
.nav-toggle,
.carousel__btn,
.modal__close,
.modal__dialog,
.class-card,
.home-devlog__card,
.frame {
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
  -ms-interpolation-mode: nearest-neighbor;
}

/* Hollow Crown on short UI / titles. Long-form body stays --font-body. */
.pixel-font,
h1,
h2,
h3,
.btn,
.site-nav__link,
.nav-toggle,
.filter-btn,
.brand__name,
.hero__title,
.hero__creed,
.hero__scroll,
.hero__scroll-label,
.hero__hook,
.page-header__title,
.section__title,
.class-card__name,
.class-detail__name,
.devlog-entry__title,
.cta-band h2,
.not-found h1,
.tag,
.eyebrow {
  font-family: var(--font-ui);
  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: grayscale;
  font-smooth: never;
  text-rendering: auto;
  font-weight: 400;
  font-style: normal;
  letter-spacing: 0.03em;
}

.hero__creed {
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero__scroll,
.hero__scroll-label {
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   9-slice frame  (borders 9-sl.png)
   -------------------------------------------------------------------------- */
.pixel-border,
.frame,
.class-card,
.home-devlog__card,
.modal__dialog {
  border-style: solid;
  border-width: var(--ui-unit);
  border-image-source: var(--ui-img-border);
  border-image-slice: 8 fill;
  border-image-width: var(--ui-unit);
  border-image-repeat: repeat;
  border-image-outset: 0;
  border-radius: 0;
  box-shadow: none;
  background-color: var(--panel-solid);
}

.frame::before,
.frame::after {
  content: none;
}

/* --------------------------------------------------------------------------
   9-slice buttons  (button_{normal,hover,pressed} 9-sl.png)
   Beige parchment fill — ink-colored HTML text, never baked into the PNG.
   -------------------------------------------------------------------------- */
.pixel-button,
.btn {
  display: inline-flex;
}

.pixel-button,
.btn,
.nav-toggle {
  position: relative;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 0;
  padding: 0.15em 0.7em;
  border-style: solid;
  border-width: var(--ui-unit);
  border-image-source: var(--ui-img-btn);
  border-image-slice: 8 fill;
  border-image-width: var(--ui-unit);
  border-image-repeat: repeat;
  border-image-outset: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--ui-ink);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.1;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
  overflow: visible;
  transform: none;
  transition: color var(--dur-fast) var(--ease),
    filter var(--dur-fast) var(--ease);
}

.pixel-button::before,
.btn::before,
.nav-toggle::before {
  content: none;
  display: none;
}

.pixel-button:hover,
.btn:hover,
.nav-toggle:hover {
  color: var(--ui-ink);
  border-image-source: var(--ui-img-btn-hover);
  background: transparent;
  box-shadow: none;
  transform: none;
  filter: none;
}

.pixel-button:active,
.btn:active,
.nav-toggle:active {
  border-image-source: var(--ui-img-btn-pressed);
  transform: none;
}

.pixel-button:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible,
.pixel-tab:focus-visible,
.site-nav__link:focus-visible,
.filter-btn:focus-visible,
.carousel__btn:focus-visible,
.modal__close:focus-visible {
  outline: 2px solid var(--ui-gold-bright);
  outline-offset: 3px;
  border-radius: 0;
}

.btn--primary,
.btn--ghost {
  border-color: transparent;
  background: transparent;
  color: var(--ui-ink);
}

.btn--primary:hover,
.btn--ghost:hover {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.btn--sm {
  padding: 0 0.45em;
  font-size: 0.85rem;
}

.btn--block {
  width: 100%;
}

.btn .caret {
  display: none;
}

/* --------------------------------------------------------------------------
   Horizontal 3-slice  (middle row of a 24×24 canvas)
   -------------------------------------------------------------------------- */
.pixel-3slice {
  box-sizing: border-box;
  height: var(--ui-unit);
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
  border-image-outset: 0;
  background: transparent;
}

.pixel-divider {
  display: block;
  width: min(100%, 72rem);
  max-width: 100%;
  height: var(--ui-unit);
  margin: var(--sp-6) auto;
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-divider);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
  pointer-events: none;
}

.pixel-pointer {
  display: block;
  width: calc(var(--ui-unit) * 7);
  height: var(--ui-unit);
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-pointer);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
  pointer-events: none;
}

.site-nav__list {
  gap: 0;
}

/* The 8px end-caps have transparent pixels around the rounded tab.
   At 4× that empty padding reads as a gap even when CSS gap is 0.
   Pull following tabs back by one cap so the gold edges meet. */
@media (min-width: 1241px) {
  .site-nav__link {
    position: relative;
  }

  .site-nav__list > li + li {
    margin-left: calc(var(--ui-tab-unit) * -1);
  }

  .site-nav__link[aria-current="page"] {
    z-index: 1;
  }
}

/* --------------------------------------------------------------------------
   Navigation / filter tabs  (tab_{normal,active} 3-sl.png)
   Height is locked to 8×tab-scale so the end caps never distort.
   -------------------------------------------------------------------------- */
.pixel-tab,
.site-nav__link,
.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  height: var(--ui-tab-unit);
  min-height: var(--ui-tab-unit);
  max-height: var(--ui-tab-unit);
  padding: 0 0.45em;
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-tab-unit);
  border-image-source: var(--ui-img-tab);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-tab-unit);
  border-image-repeat: repeat;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--ui-gold-bright);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
}

.pixel-tab:hover,
.site-nav__link:hover,
.filter-btn:hover {
  color: var(--parchment-100);
  filter: brightness(1.12);
  background: transparent;
  border-color: transparent;
}

.pixel-tab.is-active,
.pixel-tab[aria-current="page"],
.site-nav__link[aria-current="page"],
.filter-btn[aria-pressed="true"] {
  border-image-source: var(--ui-img-tab-active);
  color: var(--parchment-100);
  filter: none;
  background: transparent;
  background-color: transparent;
}

.site-nav__link::after {
  content: none;
  display: none;
}

/* --------------------------------------------------------------------------
   Fixed-size sprites: arrows + close  (do not 9-slice)
   -------------------------------------------------------------------------- */
.pixel-icon,
.carousel__btn,
.modal__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--ui-icon-size);
  height: var(--ui-icon-size);
  padding: 0;
  border: 0;
  border-radius: 0;
  background-color: transparent;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
  box-shadow: none;
  color: transparent;
  font-size: 0;
  line-height: 0;
  overflow: hidden;
}

.pixel-icon--left,
.carousel__btn[data-carousel-step="-1"],
.carousel__btn[aria-label^="Previous"],
.carousel__btn[aria-label*="left"] {
  background-image: var(--ui-img-arrow-left);
}

.pixel-icon--right,
.carousel__btn[data-carousel-step="1"],
.carousel__btn[aria-label^="Next"],
.carousel__btn[aria-label*="right"] {
  background-image: var(--ui-img-arrow-right);
}

.pixel-icon--close,
.modal__close {
  background-image: var(--ui-img-close);
}

.carousel__btn:hover,
.modal__close:hover {
  filter: brightness(1.15);
  color: transparent;
  border-color: transparent;
  background-color: transparent;
}

/* --------------------------------------------------------------------------
   Site-specific mappings (existing markup, no new pages)
   -------------------------------------------------------------------------- */

.eyebrow {
  gap: var(--sp-3);
}

.eyebrow::before {
  content: "";
  width: calc(var(--ui-unit) * 6);
  height: var(--ui-unit);
  flex: 0 0 auto;
  background: none;
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-pointer);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
}

.section__head--center .eyebrow::after {
  content: "";
  width: calc(var(--ui-unit) * 6);
  height: var(--ui-unit);
  background: none;
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-pointer);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
}

.text-link {
  font-family: var(--font-ui);
  -webkit-font-smoothing: none;
  letter-spacing: 0.04em;
  border-bottom: 0;
  padding-bottom: 0;
  color: var(--ui-gold-bright);
}

.text-link:hover {
  color: var(--parchment-100);
}

.class-card {
  overflow: visible;
  transform: none;
}

.class-card:hover,
.class-card:focus-within {
  transform: none;
  box-shadow: none;
  filter: brightness(1.06);
}

.class-card__art {
  border-bottom: 0;
}

.class-card__sprite {
  border-radius: 0;
  backdrop-filter: none;
  background: rgba(5, 5, 6, 0.72);
  border: 0;
}

.home-devlog__card {
  overflow: visible;
  transform: none;
}

.home-devlog__card:hover {
  transform: none;
  filter: brightness(1.06);
}

.modal {
  backdrop-filter: none;
}

.modal__dialog {
  background: var(--panel-solid);
}

.modal__close {
  top: var(--ui-unit);
  right: var(--ui-unit);
  background-color: transparent;
}

.class-detail__sprite {
  border-radius: 0;
  backdrop-filter: none;
  border: 0;
  background: rgba(5, 5, 6, 0.72);
}

.page-header {
  border-bottom: 0;
}

.page-header::after {
  left: var(--gutter);
  right: var(--gutter);
  height: var(--ui-unit);
  background: transparent;
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-divider);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
}

.site-header.is-scrolled,
.site-header--solid {
  background: rgba(5, 5, 6, 0.94);
  border-bottom-color: transparent;
  backdrop-filter: none;
}

.site-header.is-scrolled::after,
.site-header--solid::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0;
  height: var(--ui-unit);
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-divider);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
  pointer-events: none;
}

.site-footer {
  border-top: 0;
  background: rgba(3, 3, 4, 0.9);
}

.site-footer::before {
  content: "";
  display: block;
  width: min(100%, calc(var(--width-max) - var(--gutter) * 2));
  height: var(--ui-unit);
  margin: 0 auto var(--sp-8);
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-divider);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
}

.cta-band {
  border-top: 0;
  border-bottom: 0;
}

.filters {
  border-bottom: 0;
  gap: 0;
  row-gap: var(--sp-2);
}

.filters__tabs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}

.filters .filter-btn {
  position: relative;
}

.filters .filter-btn + .filter-btn {
  margin-left: calc(var(--ui-tab-unit) * -1);
}

.filters .filter-btn:hover,
.filters .filter-btn[aria-pressed="true"] {
  z-index: 1;
}

.devlog-entry {
  border-bottom: 0;
}

.devlog-entry::after {
  content: "";
  grid-column: 1 / -1;
  display: block;
  height: var(--ui-unit);
  margin-top: var(--sp-5);
  border-style: solid;
  border-color: transparent;
  border-width: 0 var(--ui-unit);
  border-image-source: var(--ui-img-divider);
  border-image-slice: 8 fill;
  border-image-width: 0 var(--ui-unit);
  border-image-repeat: repeat;
}

.notice {
  border-radius: 0;
}

.ph,
.asset-img {
  border-radius: 0;
}

.tag,
.badge-mock,
.tbd,
.empty-state {
  border-radius: 0;
}

.skip-link {
  font-family: var(--font-ui);
  border-radius: 0;
}

/* Long-form stays on the body stack even though headings use Hollow Crown. */
.prose,
.prose p,
.prose li,
.hero__desc,
.page-header__lead,
.home-premise__copy p,
.class-card__desc,
.class-detail__body > p,
.devlog-entry__summary,
.site-footer__tagline {
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  font-smooth: auto;
  letter-spacing: 0;
  text-transform: none;
}

.lightbox__stage {
  border-style: solid;
  border-width: var(--ui-unit);
  border-image-source: var(--ui-img-border);
  border-image-slice: 8 fill;
  border-image-width: var(--ui-unit);
  border-image-repeat: repeat;
}

/* Mobile / tablet: keep tab height locked; stretch width to the label row. */
@media (max-width: 1240px) {
  .site-nav__list {
    gap: var(--sp-2);
    border-top: 0;
  }

  .site-nav__link {
    display: flex;
    width: 100%;
    justify-content: center;
    padding: 0 0.45em;
    border-bottom: 0;
    font-size: 0.95rem;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--parchment-100);
  }

  .nav-toggle {
    margin-left: auto;
  }
}

@media (max-width: 768px) {
  :root {
    --ui-tab-scale: 3; /* 24px tabs — still integer, fits 390px */
  }

  .btn,
  .pixel-button {
    font-size: 0.85rem;
  }

  .hero__title {
    letter-spacing: 0.02em;
  }

  .hero__creed {
    letter-spacing: 0.1em;
  }
}

@media (max-width: 560px) {
  .btn {
    white-space: normal;
    text-align: center;
  }
}