/* AI-кодинг, не вайб-кодинг · Swiss poster deck */

:root {
  --paper: #EDE8DC;
  --night: #101012;
  --ink: #141414;
  --teal: #3EB5BF;
  --teal-dark: #4CC9D3;
  --coral: #E85A3C;
  --coral-dark: #FF4D3D;
  --grey: #8A867C;
  --yellow: #F2B33D;
  --display: "Oswald", "Arial Narrow", sans-serif;
  --text: "Manrope", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --stage-pad: clamp(48px, 3.5vw, 56px);
  --title-size: clamp(72px, 6.5vw, 120px);
  --body-size: clamp(30px, 2.5vw, 48px);
  --dense-size: clamp(26px, 2.125vw, 38px);
}

* {
  box-sizing: border-box;
}

html,
body {
  block-size: 100%;
  margin: 0;
}

html {
  background: var(--night);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow: hidden;
  background: var(--night);
  color: var(--paper);
  font-family: var(--text);
}

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

:focus-visible {
  outline: 4px solid var(--coral);
  outline-offset: 6px;
}

/* Stage and themes */

.deck {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: var(--night);
}

.slide {
  --surface: var(--paper);
  --fg: var(--ink);
  --accent-a: var(--teal);
  --accent-b: var(--coral);
  --line-color: color-mix(in srgb, var(--fg) 24%, transparent);
  position: absolute;
  inset: 0;
  z-index: 0;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: clamp(28px, 2.5vw, 40px);
  overflow: hidden;
  padding: var(--stage-pad);
  background-color: var(--surface);
  color: var(--fg);
  opacity: 0;
  pointer-events: none;
  transform: translateX(20px);
  transition-property: opacity, transform, background-color, color;
  transition-duration: 500ms;
  transition-timing-function: var(--ease-out);
}

.slide[data-theme="dark"] {
  --surface: var(--night);
  --fg: var(--paper);
  --accent-a: var(--teal-dark);
  --accent-b: var(--coral-dark);
}

.slide::before,
.slide::after {
  content: "";
  position: absolute;
  z-index: 0;
  display: block;
  background: var(--fg);
  opacity: 0.18;
  pointer-events: none;
}

.slide::before {
  inset-block-start: 0;
  inset-inline-start: 37.5%;
  inline-size: 2px;
  block-size: 18%;
}

.slide::after {
  inset-block-start: 19%;
  inset-inline-end: 0;
  inline-size: 17%;
  block-size: 2px;
}

.slide.is-active {
  z-index: 2;
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.slide.is-leaving {
  z-index: 1;
  opacity: 0;
  transform: translateX(-20px);
}

.deck.is-back .slide {
  transform: translateX(-20px);
}

.deck.is-back .slide.is-active {
  transform: translateX(0);
}

.deck.is-back .slide.is-leaving {
  transform: translateX(20px);
}

.slide:has(.slide__list li:nth-child(8)),
.slide:has(.steps li:nth-child(8)) {
  grid-template-columns: minmax(0, 39fr) minmax(0, 11fr);
}

.slide--dense {
  grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
}

.slide--dense:has(.tbl),
.slide--dense:has(.grid) {
  grid-template-columns: minmax(0, 39fr) minmax(0, 11fr);
}

.slide:has(.slide__media--diagram) {
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
}

/* Slide entrance */

.slide.is-active .rise {
  animation: rise 460ms var(--ease-out) both;
}

.slide.is-active .rise:nth-child(1) { animation-delay: 80ms; }
.slide.is-active .rise:nth-child(2) { animation-delay: 150ms; }
.slide.is-active .rise:nth-child(3) { animation-delay: 220ms; }
.slide.is-active .rise:nth-child(4) { animation-delay: 290ms; }
.slide.is-active .rise:nth-child(5) { animation-delay: 360ms; }
.slide.is-active .rise:nth-child(6) { animation-delay: 430ms; }
.slide.is-active .rise:nth-child(7) { animation-delay: 500ms; }
.slide.is-active .rise:nth-child(8) { animation-delay: 570ms; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Type system */

.slide__text {
  position: relative;
  z-index: 3;
  display: flex;
  min-inline-size: 0;
  min-block-size: 0;
  max-block-size: calc(100svh - 2 * var(--stage-pad));
  flex-direction: column;
  justify-content: center;
  overflow: visible;
}

.slide__title {
  max-inline-size: 12ch;
  margin: 0 0 0.22em;
  font-family: var(--display);
  font-size: var(--title-size);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  text-wrap: balance;
  overflow-wrap: break-word;
}

.slide__title::after {
  content: "";
  display: block;
  inline-size: min(3.25em, 100%);
  block-size: 2px;
  margin-block-start: 0.2em;
  background: var(--fg);
  opacity: 0.34;
}

.slide__title em {
  color: var(--accent-b);
  font-style: normal;
}

.slide__lead,
.slide__list,
.cols,
.tbl,
.grid,
.steps,
.formula {
  font-size: var(--body-size);
}

.slide__lead {
  max-inline-size: 34ch;
  margin: 0 0 0.52em;
  font-weight: 500;
  line-height: 1.2;
  text-wrap: pretty;
}

.slide__list {
  max-inline-size: 42ch;
  margin: 0;
  padding: 0;
  list-style: none;
  line-height: 1.14;
}

.slide__list li {
  position: relative;
  padding: 0.14em 0 0.14em 0.86em;
  border-block-start: 2px solid var(--line-color);
  text-wrap: pretty;
}

.slide__list li:last-child {
  border-block-end: 2px solid var(--line-color);
}

.slide__list li::before {
  content: "";
  position: absolute;
  inset-block-start: 0.72em;
  inset-inline-start: 0;
  inline-size: 0.5em;
  block-size: 2px;
  background: var(--accent-a);
}

.slide:has(.slide__list li:nth-child(8)) .slide__list,
.slide:has(.steps li:nth-child(8)) .steps {
  font-size: var(--dense-size);
  line-height: 1.08;
}

.slide:has(.slide__list li:nth-child(8)) .slide__title,
.slide:has(.steps li:nth-child(8)) .slide__title {
  max-inline-size: 100%;
  font-size: clamp(72px, 6vw, 96px);
}

.slide:has(.slide__list li:nth-child(8)) .slide__list li,
.slide:has(.steps li:nth-child(8)) .steps li {
  padding-block: 0.08em;
}

.slide__list b,
.slide__lead b,
.steps b,
.slide__foot b {
  font-weight: 700;
}

.mono {
  font-family: var(--mono);
  font-size: 1em;
  font-variant-numeric: tabular-nums;
}

.formula {
  max-inline-size: 32ch;
  margin: 0 0 0.5em;
  padding-block: 0.28em;
  border-block: 2px solid var(--line-color);
  font-weight: 600;
  line-height: 1.14;
  text-wrap: pretty;
}

.formula i {
  color: inherit;
  font-style: normal;
  text-decoration: underline;
  text-decoration-color: var(--accent-a);
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.12em;
}

.slide__foot {
  max-inline-size: 38ch;
  margin: 0.52em 0 0;
  font-size: clamp(28px, 2.125vw, 38px);
  font-weight: 500;
  line-height: 1.14;
  text-wrap: pretty;
}

.slide__foot::before {
  content: "";
  display: inline-block;
  inline-size: 1.4em;
  block-size: 0.16em;
  margin-inline-end: 0.36em;
  background: var(--accent-b);
  vertical-align: 0.14em;
}

.byline {
  display: flex;
  gap: 0.9em 1.8em;
  flex-wrap: wrap;
  margin-block-start: 0.72em;
  font-size: clamp(28px, 2.125vw, 38px);
  line-height: 1.12;
}

.byline span {
  display: block;
}

.byline b {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  text-transform: uppercase;
}

/* Sequential lists */

.steps {
  max-inline-size: 42ch;
  margin: 0;
  padding: 0;
  counter-reset: slide-step;
  list-style: none;
  line-height: 1.14;
}

.steps li {
  display: grid;
  grid-template-columns: 1.25em minmax(0, 1fr);
  gap: 0.35em;
  padding-block: 0.13em;
  border-block-start: 2px solid var(--line-color);
  counter-increment: slide-step;
}

.steps li:last-child {
  border-block-end: 2px solid var(--line-color);
}

.steps li::before {
  content: counter(slide-step, decimal-leading-zero);
  color: var(--accent-b);
  font-family: var(--display);
  font-size: 1em;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  line-height: 1.08;
}

/* Columns: typographic comparison, never cards */

.cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  inline-size: 100%;
  line-height: 1.12;
}

.cols__col {
  min-inline-size: 0;
  padding-inline-end: 0.65em;
}

.cols__col + .cols__col {
  padding-inline: 0.65em 0;
  border-inline-start: 2px solid var(--line-color);
}

.cols__head,
.grid__head {
  margin: 0 0 0.28em;
  font-family: var(--display);
  font-size: 1.16em;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  text-wrap: balance;
}

.cols__col:first-child .cols__head {
  color: var(--accent-b);
}

.cols__col:last-child .cols__head {
  color: var(--accent-a);
}

.cols ul,
.grid ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cols li {
  padding-block: 0.1em;
  border-block-start: 2px solid var(--line-color);
  text-wrap: pretty;
}

.cols li:last-child {
  border-block-end: 2px solid var(--line-color);
}

/* Tables: horizontal rules only */

.tbl {
  inline-size: 100%;
  border-collapse: collapse;
  color: inherit;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  text-align: start;
}

.tbl th,
.tbl td {
  padding: 0.13em 0.5em 0.13em 0;
  border: 0;
  background: transparent;
  text-align: start;
  vertical-align: top;
  text-wrap: pretty;
}

.tbl th:last-child,
.tbl td:last-child {
  padding-inline-end: 0;
}

.tbl tr {
  border-block-start: 2px solid var(--line-color);
}

.tbl tbody tr:last-child {
  border-block-end: 2px solid var(--line-color);
}

.tbl th {
  color: var(--accent-a);
  font-family: var(--display);
  font-size: 1.08em;
  font-weight: 600;
  text-transform: uppercase;
}

.tbl th:first-child,
.tbl td:first-child {
  inline-size: 31%;
  font-weight: 700;
}

/* Grid: group heading plus plain, separated text */

.grid {
  display: grid;
  gap: 0;
  inline-size: 100%;
  line-height: 1.1;
}

.grid__cell {
  display: grid;
  grid-template-columns: minmax(4.8em, 0.8fr) minmax(0, 2.2fr);
  gap: 0.65em;
  align-items: start;
  padding-block: 0.24em;
  border-block-start: 2px solid var(--line-color);
}

.grid__cell:last-child {
  border-block-end: 2px solid var(--line-color);
}

.grid__head {
  margin: 0;
  color: var(--accent-b);
}

.grid ul {
  display: flex;
  gap: 0 0.26em;
  flex-wrap: wrap;
}

.grid li {
  display: inline;
}

.grid li:not(:last-child)::after {
  content: " /";
  color: var(--accent-a);
}

/* Media collage */

.slide__media {
  position: relative;
  z-index: 2;
  align-self: stretch;
  justify-self: stretch;
  min-inline-size: 0;
  min-block-size: 0;
  inline-size: 100%;
  block-size: 100%;
  margin: 0;
  overflow: visible;
  background: var(--surface);
  isolation: isolate;
}

.slide__media::before,
.slide__media::after {
  content: "";
  position: absolute;
  z-index: 0;
  display: block;
  border-radius: 50%;
  pointer-events: none;
}

.slide__media::before {
  inset-block-start: 7%;
  inset-inline-start: -18%;
  inline-size: clamp(220px, 18vw, 288px);
  aspect-ratio: 1;
  background: var(--accent-a);
}

.slide__media::after {
  inset-inline-end: -14%;
  inset-block-end: 5%;
  inline-size: clamp(160px, 13vw, 208px);
  aspect-ratio: 1;
  background: var(--accent-b);
}

.slide__media > img,
.slide__media > svg {
  position: relative;
  z-index: 1;
  display: block;
  inline-size: 100%;
  block-size: 100%;
}

.slide__media > img {
  object-fit: cover;
  object-position: center;
}

.slide__media > svg {
  overflow: visible;
  color: var(--fg);
}

.slide__media--diagram {
  --d-bg: var(--surface);
  --d-fg: var(--fg);
  --d-line: var(--fg);
  --d-accent: var(--accent-b);
  --d-muted: var(--grey);
  --d-good: var(--accent-a);
  --d-bad: var(--accent-b);
}

.slide__media--diagram svg text {
  font-family: var(--text) !important;
}

.slide__media--diagram svg rect[rx] {
  rx: 0 !important;
  ry: 0 !important;
}

.slide__media .cap {
  position: absolute;
  z-index: 4;
  inset-inline-start: 0;
  inset-block-end: 0;
  max-inline-size: 86%;
  padding: 0.18em 0.3em;
  background: var(--surface);
  color: var(--fg);
  font-size: clamp(28px, 2.125vw, 34px);
  font-weight: 600;
  line-height: 1.12;
}

.slide__media svg .muted {
  color: var(--grey);
  stroke: var(--grey);
}

.slide__media .step {
  opacity: 0;
  transform: translateY(10px);
  transition-property: opacity, transform;
  transition-duration: 460ms;
  transition-timing-function: var(--ease-out);
}

.slide__media .step.is-shown {
  opacity: 1;
  transform: translateY(0);
}

.slide--dense .slide__title {
  max-inline-size: 100%;
  font-size: clamp(72px, 6vw, 96px);
}

.slide--dense .slide__lead,
.slide--dense .slide__list,
.slide--dense .cols,
.slide--dense .tbl,
.slide--dense .grid,
.slide--dense .steps,
.slide--dense .formula {
  font-size: var(--dense-size);
}

.slide--dense .slide__media::before {
  inset-inline-start: -32%;
}

.slide--dense .slide__media::after {
  inset-inline-end: -26%;
}

/* Cover and closing: full-bleed image plus one solid panel */

.slide--cover,
.slide--closing {
  display: block;
  padding: 0;
}

.slide--cover::before,
.slide--cover::after,
.slide--closing::before,
.slide--closing::after {
  display: none;
}

.slide--cover .slide__media,
.slide--closing .slide__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  inline-size: 100%;
  block-size: 100%;
  overflow: hidden;
  background: var(--surface);
}

.slide--cover .slide__media::before,
.slide--cover .slide__media::after,
.slide--closing .slide__media::before,
.slide--closing .slide__media::after {
  display: none;
}

.slide--cover .slide__text,
.slide--closing .slide__text {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  z-index: 3;
  inline-size: 57%;
  max-block-size: none;
  padding: var(--stage-pad);
  background: var(--surface);
}

.slide--closing .slide__text {
  inline-size: 62%;
}

.slide--cover .slide__title,
.slide--closing .slide__title {
  max-inline-size: 10ch;
  font-size: clamp(80px, 7vw, 120px);
}

.slide--cover .slide__lead,
.slide--closing .slide__lead {
  max-inline-size: 29ch;
  font-size: clamp(34px, 2.75vw, 48px);
}

.slide--cover .slide__media > img,
.slide--closing .slide__media > img {
  object-position: center;
}

/* Triptych support */

.slide--triptych {
  grid-template-columns: 1fr;
  grid-template-rows: auto minmax(0, 1fr);
}

.slide--triptych .slide__text {
  justify-content: flex-start;
}

.slide--triptych .slide__title {
  max-inline-size: none;
}

.triptych {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  min-block-size: 0;
}

.triptych figure {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 16px;
  min-inline-size: 0;
  min-block-size: 0;
  margin: 0;
}

.triptych .slide__media {
  min-block-size: 0;
}

.triptych figcaption {
  font-size: clamp(28px, 2.125vw, 34px);
  line-height: 1.15;
  text-wrap: pretty;
}

.triptych figcaption b {
  display: block;
  font-family: var(--display);
  font-size: 1.16em;
  font-weight: 600;
  text-transform: uppercase;
}

/* QR: large enough for a room, no badge treatment */

.slide__qr {
  position: absolute;
  z-index: 6;
  inset-block-start: var(--stage-pad);
  inset-inline-end: var(--stage-pad);
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.qr {
  display: flex;
  inline-size: clamp(136px, 9.5vw, 152px);
  flex-direction: column;
  gap: 8px;
  color: inherit;
  text-decoration: none;
}

.qr img {
  display: block;
  inline-size: 100%;
  block-size: auto;
  background: var(--paper);
}

.qr span {
  color: var(--fg);
  font-size: clamp(24px, 1.875vw, 32px);
  font-weight: 500;
  line-height: 1.08;
  overflow-wrap: break-word;
}

.qr span b {
  display: block;
  font-weight: 700;
}

.slide.has-qr:not(.slide--cover):not(.slide--closing) .slide__media > img {
  object-position: center 60%;
}

.slide--cover .slide__qr,
.slide--closing .slide__qr {
  inset-block-start: var(--stage-pad);
  inset-inline-end: var(--stage-pad);
}

.slide--cover .qr,
.slide--closing .qr {
  inline-size: clamp(144px, 10vw, 160px);
}

/* Decorative skyline from deck.js is intentionally suppressed. */

.skyline {
  display: none;
}

/* Minimal presentation HUD */

.hud {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.hud__rail,
.hud__counter {
  display: none !important;
}

.hud__progress {
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  block-size: 6px;
  background: transparent;
}

.hud__progress i {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  background: var(--teal-dark);
  transform: scaleX(0);
  transform-origin: left;
  transition-property: transform;
  transition-duration: 500ms;
  transition-timing-function: var(--ease-out);
}

/* Code HUD, inserted only into slides with data-hud="1" */

.code-hud {
  position: absolute;
  z-index: 5;
  inset-inline-end: 20px;
  inset-block-end: 20px;
  inline-size: min(88%, 500px);
  padding: 14px 18px;
  border-block: 2px solid currentColor;
  background: var(--surface);
  color: var(--fg);
  font-family: var(--mono);
  font-size: clamp(24px, 1.875vw, 30px);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  line-height: 1.18;
}

.code-hud__line {
  min-block-size: 1.18em;
  white-space: nowrap;
}

.code-hud__line:nth-child(2) {
  color: var(--accent-a);
}

.code-hud__line:nth-child(4) {
  color: var(--accent-b);
}

.code-hud__cursor {
  display: inline-block;
  color: var(--accent-b);
  animation: cursor-blink 900ms steps(2, end) infinite;
}

.slide:not(.is-active) .code-hud__cursor {
  animation-play-state: paused;
}

@keyframes cursor-blink {
  0%, 45% { opacity: 1; }
  46%, 100% { opacity: 0; }
}

/* Presenter-only overlays */

.notes,
.help {
  position: fixed;
  z-index: 30;
  border: 2px solid var(--paper);
  background: var(--night);
  color: var(--paper);
  font-family: var(--text);
  font-size: 24px;
  line-height: 1.4;
}

.notes {
  inset-inline-end: 24px;
  inset-block-end: 24px;
  inline-size: min(640px, 48vw);
  max-block-size: 54vh;
  overflow: auto;
  padding: 20px 24px;
}

.notes__head {
  margin-block-end: 8px;
  color: var(--coral-dark);
  font-family: var(--display);
  font-size: 30px;
  font-weight: 600;
  text-transform: uppercase;
}

.notes p,
.help p {
  margin: 0;
}

.help {
  inset-inline: 10%;
  inset-block-end: 24px;
  padding: 16px 20px;
  text-align: center;
}

kbd {
  border-block-end: 2px solid currentColor;
  color: inherit;
  font-family: var(--mono);
  font-size: 1em;
}

/* Scripted print preview (?print=1) */

body.is-print .hud,
body.is-print .notes,
body.is-print .help {
  display: none;
}

body.is-print .slide,
body.is-print .slide *,
body.is-print .slide::before,
body.is-print .slide::after {
  animation: none !important;
  transition: none !important;
}

body.is-print .slide__media .step {
  opacity: 1;
  transform: none;
}

body.is-print .code-hud__line:not(:first-child) {
  display: none;
}

body.is-print .code-hud__cursor {
  animation: none;
  opacity: 1;
}

/* Reduced motion: no movement, no fades, no blinking. */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation: none !important;
    transition: none !important;
  }

  .slide__media .step {
    opacity: 1;
    transform: none;
  }

  .code-hud__cursor {
    opacity: 1;
  }
}

/* Narrow preview: slides become a vertical document. */

@media (max-aspect-ratio: 1/1) {
  body {
    overflow: auto;
  }

  .deck {
    position: static;
    overflow: visible;
  }

  .slide,
  .slide--dense,
  .slide--dense:has(.tbl),
  .slide--dense:has(.grid),
  .slide:has(.slide__list li:nth-child(8)),
  .slide:has(.steps li:nth-child(8)) {
    position: relative;
    inset: auto;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(42svh, 1fr);
    min-block-size: 100svh;
    gap: 32px;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .slide__text {
    max-block-size: none;
    justify-content: flex-start;
  }

  .slide__title,
  .slide--dense .slide__title {
    max-inline-size: 12ch;
    font-size: clamp(54px, 12vw, 80px);
  }

  .slide__lead,
  .slide__list,
  .cols,
  .tbl,
  .grid,
  .steps,
  .formula,
  .slide--dense .slide__lead,
  .slide--dense .slide__list,
  .slide--dense .cols,
  .slide--dense .tbl,
  .slide--dense .grid,
  .slide--dense .steps,
  .slide--dense .formula {
    font-size: clamp(26px, 6vw, 36px);
  }

  .slide__foot,
  .byline,
  .triptych figcaption {
    font-size: clamp(24px, 5.5vw, 34px);
  }

  .slide__media {
    min-block-size: 42svh;
  }

  .slide--cover,
  .slide--closing {
    display: grid;
    padding: 0;
  }

  .slide--cover .slide__media,
  .slide--closing .slide__media {
    position: absolute;
  }

  .slide--cover .slide__text,
  .slide--closing .slide__text {
    position: relative;
    inline-size: 78%;
    min-block-size: 100svh;
  }

  .slide--cover .slide__title,
  .slide--closing .slide__title {
    font-size: clamp(60px, 13vw, 84px);
  }

  .cols,
  .triptych {
    grid-template-columns: 1fr;
  }

  .cols__col + .cols__col {
    padding-block-start: 0.55em;
    padding-inline: 0;
    border-block-start: 2px solid var(--line-color);
    border-inline-start: 0;
  }

  .grid__cell {
    grid-template-columns: 1fr;
  }

  .slide__qr {
    position: relative;
    inset: auto;
    z-index: 7;
    flex-wrap: wrap;
    margin: 0 var(--stage-pad) var(--stage-pad);
  }

  .hud,
  .notes,
  .help {
    display: none;
  }

  .slide .rise {
    animation: none !important;
  }
}

/* Print to PDF: fixed 1600 × 900, one slide per page. */

@page {
  size: 1600px 900px;
  margin: 0;
}

@media print {
  :root {
    --stage-pad: 56px;
    --title-size: 104px;
    --body-size: 40px;
    --dense-size: 34px;
  }

  html,
  body {
    inline-size: 1600px;
    block-size: auto;
    overflow: visible;
    background: var(--night);
  }

  .deck {
    position: static;
    overflow: visible;
  }

  .slide,
  .deck.is-back .slide,
  .deck.is-back .slide.is-active,
  .deck.is-back .slide.is-leaving {
    position: relative;
    inset: auto;
    visibility: visible;
    inline-size: 1600px;
    block-size: 900px;
    overflow: hidden;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    page-break-after: always;
    break-after: page;
    break-inside: avoid;
  }

  .slide:last-child {
    page-break-after: auto;
    break-after: auto;
  }

  .slide,
  .slide *,
  .slide::before,
  .slide::after {
    animation: none !important;
    transition: none !important;
  }

  .slide__media .step {
    opacity: 1;
    transform: none;
  }

  .code-hud__line:not(:first-child) {
    display: none;
  }

  .hud,
  .notes,
  .help {
    display: none !important;
  }

  body,
  .slide,
  .slide__media > img,
  .qr img {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}