/* ============================================================
   OtraTipoMas — Diseño Tipográfico Computadorizado
   Prof. Pedro Medina Leandry
   Black & white system, Neopol Sans, Hugeicons (free, MIT)
   ============================================================ */

/* ---------- 1. Fonts ---------- */

@font-face {
  font-family: 'Neopol';
  src: url('../public/NeopolSans-Regular.woff2') format('woff2'),
       url('../public/NeopolSans-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Neopol';
  src: url('../public/NeopolSans-RegularSlanted.woff2') format('woff2'),
       url('../public/NeopolSans-RegularSlanted.otf') format('opentype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: 'Neopol Ultra';
  src: url('../public/NeopolSans-Ultra.woff2') format('woff2'),
       url('../public/NeopolSans-Ultra.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Neopol Ultra';
  src: url('../public/NeopolSans-UltraSlanted.woff2') format('woff2'),
       url('../public/NeopolSans-UltraSlanted.otf') format('opentype');
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

/* ---------- 2. Tokens ---------- */

:root {
  --paper: #ffffff;
  --ink: #000000;

  /* the only greys in the system: one hairline, one muted text */
  --hair: #d8d8d8;
  --muted: #6e6e6e;

  --font-body: 'Neopol', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'Neopol Ultra', 'Neopol', 'Helvetica Neue', Arial, sans-serif;

  --gutter: clamp(20px, 5vw, 64px);
  --maxw: 1280px;

  /* the header is a floating glass square, not a bar */
  --tile: clamp(96px, 10vw, 140px);
  --tile-gap: clamp(12px, 1.6vw, 24px);
  --header-h: calc(var(--tile) + var(--tile-gap) * 2);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. Reset ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
img { height: auto; }

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* the router focuses <main> after each render so assistive tech lands in the
   right place; Safari paints a ring for that programmatic focus and it reads
   as a black rule across the page, so suppress it on this element only */
#app:focus,
#app:focus-visible {
  outline: none;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 4. Type primitives ---------- */

.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 0.9;
  letter-spacing: -0.025em;
  text-transform: uppercase;
  margin: 0;
}

/* the longest word (COMPUTADORIZADO) needs ~7.9x its font size,
   so the lower bound stays small enough to fit a 320px screen */
.display--xl { font-size: clamp(2.1rem, 9.5vw, 7.2rem); }
.display--l  { font-size: clamp(2.2rem, 6vw, 4.25rem); }
.display--m  { font-size: clamp(1.5rem, 3.2vw, 2.4rem); letter-spacing: -0.015em; }
.display--s  { font-size: clamp(1.1rem, 2vw, 1.4rem); letter-spacing: -0.01em; }

.eyebrow {
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  line-height: 1.2;
  margin: 0;
}

.eyebrow--muted { color: var(--muted); }

.lede {
  font-size: clamp(1.0625rem, 1.5vw, 1.3125rem);
  line-height: 1.5;
  max-width: 46ch;
  margin: 0;
}

.muted { color: var(--muted); }

/* ---------- 5. Layout ---------- */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.skip-link:focus {
  left: 0;
}

.rule {
  border: 0;
  border-top: 1px solid var(--hair);
  margin: 0;
}

.rule--ink { border-top-color: var(--ink); }
.rule--thick { border-top: 2px solid var(--ink); }

/* ---------- 6. Header ---------- */

/* The header spans the full width but only the logo square is real, so it
   lets pointer events through: otherwise the empty strip beside the tile
   would swallow clicks on whatever scrolls underneath it. */
/* Fixed, not sticky, so it reserves no space in the flow. That lets the hero
   own the whole top of the page and clip its artwork with plain
   `overflow: hidden` instead of `overflow-x: clip`, which WebKit renders
   unreliably on first paint (a white band over the artwork until a repaint). */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: flex-start;
  padding-block: var(--tile-gap);
}

/* the glass square that holds the logo */
.brand {
  display: grid;
  place-items: center;
  width: var(--tile);
  height: var(--tile);
  flex-shrink: 0;
  pointer-events: auto;
  border: 1px solid var(--hair);
  background: rgba(255, 255, 255, 0.62);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease);
  /* keep the blur's compositing box to the tile itself: without this WebKit
     uses the full-width header band as the region for the backdrop layer */
  contain: paint;
  isolation: isolate;
}

/* The glass switches on after first paint. WebKit paints the whole backdrop
   region opaque white while it sets up a backdrop-filter layer, which reads
   as a white bar across the top of the page for a moment on load. */
html.is-ready .brand {
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  backdrop-filter: blur(20px) saturate(160%);
}

.brand:hover {
  background: var(--ink);
  border-color: var(--ink);
}

.brand:hover .brand__logo { filter: invert(1); }

/* no blur support (older Firefox): fall back to solid paper */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .brand { background: var(--paper); }
}

.brand .brand__logo {
  height: 58%;
  width: auto;
  transition: filter 0.22s var(--ease);
}

/* .navlink is still used for the PDF fallback action */
.navlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--ink);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.navlink svg { width: 16px; height: 16px; }

.navlink:hover,
.navlink[aria-current='page'] {
  background: var(--ink);
  color: var(--paper);
}

.navlink--ghost { border-color: transparent; }
.navlink--ghost:hover { border-color: var(--ink); }

/* ---------- 7. Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  /* the header floats, so the hero reserves the room for it */
  padding-top: calc(var(--header-h) + clamp(48px, 9vw, 104px));
  padding-bottom: clamp(36px, 6vw, 72px);
}

/* typographic artwork, anchored right, behind the headline */
.hero__art {
  position: absolute;
  top: calc(var(--header-h) * 0.55);
  right: calc(var(--gutter) * -1);
  z-index: 0;
  width: min(74vw, 1120px);
  opacity: 0.83;
  pointer-events: none;
  user-select: none;
}

.hero__art img {
  width: 100%;
  height: auto;
  mix-blend-mode: multiply;
}

.hero > *:not(.hero__art) {
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.hero__title {
  max-width: 15ch;
  overflow-wrap: break-word;
}

.hero__title em {
  font-style: italic;
}

.hero__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(28px, 4vw, 52px);
}

.hero__credit {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-self: start;
}

.hero__credit-name {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.statbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(26px, 3.5vw, 40px);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--ink);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.chip svg { width: 15px; height: 15px; }

.chip--solid {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 8. Section headers ---------- */

.section {
  padding-block: clamp(40px, 6vw, 76px);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 0;
}

/* ---------- 9. Index rows (modules / items) ---------- */

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.row {
  display: block;
  border-bottom: 1px solid var(--hair);
}

.row__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px 22px;
  padding: clamp(20px, 2.6vw, 30px) 16px;
  margin-inline: -16px;
  width: calc(100% + 32px);
  text-align: left;
  transition: background 0.22s var(--ease), color 0.22s var(--ease);
}

.row__link:hover,
.row__link:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.row__link:hover .row__meta,
.row__link:focus-visible .row__meta { color: var(--paper); }

.row__num {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.4vw, 1.75rem);
  line-height: 1;
  letter-spacing: -0.02em;
  min-width: 2.4ch;
}

.row__body { min-width: 0; }

.row__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1.25rem, 3vw, 2.1rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0;
  overflow-wrap: break-word;
}

.row__title--sm {
  font-size: clamp(1rem, 1.9vw, 1.3rem);
  line-height: 1.15;
}

.row__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin-top: 8px;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.22s var(--ease);
}

.row__meta span { display: inline-flex; align-items: center; gap: 6px; }
.row__meta svg { width: 14px; height: 14px; }

.row__go {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 50%;
  flex-shrink: 0;
  transition: transform 0.22s var(--ease);
}

.row__go svg { width: 20px; height: 20px; }

.row__link:hover .row__go,
.row__link:focus-visible .row__go { transform: translateX(5px); }

/* item rows carry a type icon instead of a number */

.row__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid currentColor;
  flex-shrink: 0;
}

.row__icon svg { width: 20px; height: 20px; }

.row__link--indent { padding-left: clamp(24px, 5vw, 64px); }

/* an attachment that opens in place, inside the module list */

.row--open {
  border-bottom: 1px solid var(--hair);
  padding-bottom: clamp(24px, 3vw, 36px);
}

.row__open-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: clamp(20px, 2.6vw, 30px) 0 16px;
}

/* long attachment titles must wrap here, or they widen the whole page */
.row__open-head .rowhead__label {
  white-space: normal;
  line-height: 1.5;
}

.row--open .pdf { margin-bottom: 0; }

/* sub-headers inside a module */

.rowhead {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: clamp(30px, 4vw, 48px);
  padding-bottom: 12px;
}

.rowhead__label {
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  white-space: nowrap;
}

.rowhead__rule {
  flex: 1;
  border-top: 1px solid var(--ink);
}

/* ---------- 9b. Assignments — their own section, card treatment ---------- */

.tasks {
  padding-top: clamp(48px, 7vw, 88px);
}

.tasks .section__head {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.taskgrid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.task {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 20px;
  height: 100%;
  min-height: 210px;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--ink);
  transition: background 0.22s var(--ease), color 0.22s var(--ease);
}

.task:hover,
.task:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

.task:hover .task__meta,
.task:focus-visible .task__meta { color: var(--paper); }

.task__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.task__icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid currentColor;
}

.task__icon svg { width: 20px; height: 20px; }

.task__num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1;
  letter-spacing: -0.02em;
}

.task__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1.15rem, 1.9vw, 1.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
}

.task__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}

.task__meta {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.22s var(--ease);
}

.task__meta span { display: inline-flex; align-items: center; gap: 7px; }
.task__meta svg { width: 14px; height: 14px; flex-shrink: 0; }

.task__go {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 50%;
  flex-shrink: 0;
  transition: transform 0.22s var(--ease);
}

.task__go svg { width: 20px; height: 20px; }

.task:hover .task__go,
.task:focus-visible .task__go { transform: translateX(5px); }

/* ---------- 10. Module / item page shell ---------- */

.page-head {
  /* clears the floating header, same as the hero */
  padding-top: calc(var(--header-h) + clamp(30px, 5vw, 60px));
  padding-bottom: clamp(26px, 4vw, 44px);
}

.crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.crumbs a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.18s var(--ease);
}

.crumbs a:hover { border-bottom-color: var(--ink); }
.crumbs svg { width: 15px; height: 15px; }
.crumbs .sep { color: var(--muted); }
.crumbs .current { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 5vw, 64px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.sidebar { display: none; }

.sidebar__inner {
  position: sticky;
  /* no full-width bar to clear any more, just the tile's own gap */
  top: calc(var(--tile-gap) + 28px);
}

.sidebar__title {
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--ink);
  margin: 0 0 4px;
}

.sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar__link {
  display: grid;
  grid-template-columns: 2.6ch 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px 10px 12px 0;
  border-bottom: 1px solid var(--hair);
  font-size: 0.8125rem;
  line-height: 1.25;
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.sidebar__link span:first-child {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0;
  color: var(--muted);
}

.sidebar__link:hover { padding-left: 8px; }

.sidebar__link[aria-current='page'] {
  font-style: italic;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.sidebar__link[aria-current='page'] span:first-child { color: var(--ink); }

/* ---------- 11. Prose (LMS content) ---------- */

.prose {
  max-width: 72ch;
  font-size: 1.0625rem;
  line-height: 1.68;
}

.prose > *:first-child { margin-top: 0; }
.prose > *:last-child { margin-bottom: 0; }

.prose p { margin: 0 0 1.25em; }

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin: 2.2em 0 0.7em;
}

.prose h1 { font-size: clamp(1.75rem, 4vw, 2.6rem); }
.prose h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
.prose h3 { font-size: clamp(1.25rem, 2.4vw, 1.6rem); }
.prose h4 { font-size: 1.125rem; }

.prose strong { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.005em; }
.prose em { font-style: italic; }

.prose ul,
.prose ol { margin: 0 0 1.35em; padding-left: 1.35em; }
.prose li { margin-bottom: 0.5em; }
.prose li::marker { color: var(--ink); }

.prose a {
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: background 0.16s var(--ease), color 0.16s var(--ease);
}

.prose a:hover { background: var(--ink); color: var(--paper); }

.prose a.ext::after {
  content: '';
  display: inline-block;
  width: 0.6em;
  height: 0.6em;
  margin-left: 0.35em;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg) translateY(0.1em);
}

.prose img {
  margin: 1.75em 0;
  border: 1px solid var(--hair);
  cursor: zoom-in;
}

.prose hr {
  border: 0;
  border-top: 2px solid var(--ink);
  margin: 2.75em 0;
}

.prose blockquote {
  margin: 2em 0;
  padding-left: 1.25em;
  border-left: 2px solid var(--ink);
  font-style: italic;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: 0.9375rem;
}

.prose th,
.prose td {
  border: 1px solid var(--hair);
  padding: 10px 12px;
  text-align: left;
}

.prose th {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.prose iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  border: 1px solid var(--ink);
  margin: 2em 0;
}

.prose-scroll { overflow-x: auto; }

/* ---------- 12. Item meta panel ---------- */

.factlist {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--ink);
  margin-bottom: clamp(28px, 4vw, 44px);
  max-width: 72ch;
}

.fact {
  flex: 1 1 160px;
  padding: 16px 20px;
  border-right: 1px solid var(--hair);
}

.fact:last-child { border-right: 0; }

.fact__label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 7px;
}

.fact__label svg { width: 14px; height: 14px; }

.fact__value {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 0.9375rem;
  letter-spacing: -0.005em;
  line-height: 1.2;
}

/* ---------- 13. PDF viewer ---------- */

.pdf {
  border: 1px solid var(--ink);
  margin-bottom: clamp(28px, 4vw, 44px);
  background: var(--paper);
}

.pdf__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  padding: 12px 14px;
  background: var(--ink);
  color: var(--paper);
}

.pdf__name {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.pdf__name span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pdf__name svg { width: 18px; height: 18px; flex-shrink: 0; }

.pdf__tools {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.pdf__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--paper);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.pdf__btn svg { width: 15px; height: 15px; }

.pdf__btn:hover {
  background: var(--paper);
  color: var(--ink);
}

/* one page at a time on a landscape stage, arrows to move between them */
.pdf__stage {
  position: relative;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  padding: clamp(14px, 2vw, 26px);
  background: var(--paper);
}

.pdf__stage:focus-visible { outline-offset: -3px; }

.pdf__page {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
}

.pdf__page canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
}

.pdf__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.72);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), opacity 0.18s var(--ease);
}

.pdf__nav svg { width: 22px; height: 22px; }
.pdf__nav--prev { left: clamp(10px, 1.6vw, 20px); }
.pdf__nav--next { right: clamp(10px, 1.6vw, 20px); }

.pdf__nav:hover {
  background: var(--ink);
  color: var(--paper);
}

.pdf__nav[disabled] {
  opacity: 0.2;
  pointer-events: none;
}

.pdf__status {
  margin: 0;
  padding: clamp(28px, 5vw, 56px) 0;
  text-align: center;
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.pdf__fallback {
  padding: clamp(28px, 5vw, 56px);
  text-align: center;
}

.pdf__fallback p {
  max-width: 44ch;
  margin: 0 auto 22px;
  color: var(--muted);
  font-size: 0.9375rem;
}

/* the raw error, so a problem can be reported without opening the console */
.pdf__detail {
  margin-top: 20px !important;
  margin-bottom: 0 !important;
  font-size: 0.6875rem !important;
  letter-spacing: 0.04em;
  word-break: break-word;
  opacity: 0.7;
}

/* fullscreen: the page owns the whole screen, controls float over it */

.pdf--full {
  position: fixed;
  inset: 0;
  z-index: 90;
  margin: 0;
  border: 0;
  display: block;
  background: var(--ink);
}

.pdf--full .pdf__stage {
  position: absolute;
  inset: 0;
  aspect-ratio: auto;
  padding: 0;
  background: var(--ink);
}

.pdf--full .pdf__page canvas { border: 0; }

.pdf--full .pdf__bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 3;
  opacity: 0;
  transform: translateY(-100%);
  pointer-events: none;
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
}

.pdf--full.is-bar .pdf__bar {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.pdf--full .pdf__nav {
  z-index: 4;
  opacity: 0;
  pointer-events: none;
  width: 54px;
  height: 54px;
  border-color: var(--paper);
  background: rgba(0, 0, 0, 0.5);
  color: var(--paper);
}

.pdf--full .pdf__nav:hover {
  background: var(--paper);
  color: var(--ink);
}

.pdf--full.is-prev .pdf__nav--prev:not([disabled]),
.pdf--full.is-next .pdf__nav--next:not([disabled]) {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 14. Pager ---------- */

.pager {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  margin-top: clamp(40px, 6vw, 72px);
}

.pager__link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 20px;
  background: var(--paper);
  min-height: 96px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.pager__link:hover { background: var(--ink); color: var(--paper); }
.pager__link:hover .pager__label { color: var(--paper); }
.pager__link--next { justify-content: flex-end; text-align: right; flex-direction: row-reverse; }
.pager__link--empty { pointer-events: none; opacity: 0.35; }

.pager__arrow {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid currentColor;
  border-radius: 50%;
  flex-shrink: 0;
}

.pager__arrow svg { width: 20px; height: 20px; }

.pager__label {
  display: block;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 5px;
  transition: color 0.2s var(--ease);
}

.pager__title {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 1rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ---------- 15. Lightbox ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 95;
  display: grid;
  place-items: center;
  padding: clamp(16px, 4vw, 56px);
  background: rgba(0, 0, 0, 0.94);
  cursor: zoom-out;
}

.lightbox img {
  max-width: 100%;
  max-height: 88vh;
  width: auto;
  background: var(--paper);
}

.lightbox__close {
  position: absolute;
  top: 16px;
  right: 16px;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--paper);
  color: var(--paper);
}

.lightbox__close:hover { background: var(--paper); color: var(--ink); }

/* ---------- 16. Footer ---------- */

.site-footer {
  border-top: 2px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(40px, 6vw, 72px);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.site-footer .brand__logo {
  height: clamp(72px, 8vw, 104px);
  filter: invert(1);
}

.footer__credit {
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: clamp(1.1rem, 2.4vw, 1.6rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 8px;
}

.footer__note {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  opacity: 0.65;
  margin: 0;
}

.footer__meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ---------- 17. Route transition ---------- */

/* `backwards`, not `both`: a filled transform (even the identity matrix)
   would make .view the containing block for the fullscreen PDF panel */
.view {
  animation: rise 0.36s var(--ease) backwards;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.is-locked { overflow: hidden; }

/* ---------- 18. Breakpoints ---------- */

/* on narrow screens the artwork reads as a fragment unless it is
   scaled up, so give it more width and tuck it into the corner */
@media (max-width: 619px) {
  /* a 16:9 page leaves no room to overlay the arrows without covering it */
  .pdf__stage { padding-bottom: 62px; }

  .pdf__nav {
    top: auto;
    bottom: 10px;
    transform: none;
    width: 42px;
    height: 42px;
  }

  .pdf__nav--prev { left: calc(50% - 48px); }
  .pdf__nav--next { right: calc(50% - 48px); }

  .hero__art {
    top: calc(var(--header-h) * 0.3);
    width: 118vw;
  }
}

@media (min-width: 620px) {
  .pager { grid-template-columns: 1fr 1fr; }
  .taskgrid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .hero__body { grid-template-columns: minmax(0, 1.35fr) minmax(240px, 0.65fr); }
}

@media (min-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr) 260px; }
  .layout--reverse { grid-template-columns: 260px minmax(0, 1fr); }
  .sidebar { display: block; }
  .row__link { grid-template-columns: auto 1fr auto auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .pager,
  .sidebar,
  .crumbs { display: none !important; }
  body { font-size: 11pt; }
  .prose { max-width: none; }
}