:root {
  --paper: #f5f1e8;
  --paper-deep: #eee7db;
  --surface: #fbf9f4;
  --ink: #1a1a1a;
  --muted: #64615b;
  --line: rgba(26, 26, 26, 0.13);
  --red: #7c2020;
  --red-dark: #571313;
  --red-soft: rgba(124, 32, 32, 0.08);
  --gold: #a88442;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 138px;
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.75;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  content: "";
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img {
  display: block;
  max-width: 100%;
}

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

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(124, 32, 32, 0.35);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 14px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 241, 232, 0.94);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(calc(100% - 48px), var(--container));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img {
  width: 52px;
  height: 42px;
  object-fit: contain;
}

.brand-copy {
  display: grid;
  line-height: 1.18;
}

.brand-copy strong {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.brand-copy small {
  margin-top: 3px;
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  white-space: nowrap;
}

.main-nav a {
  position: relative;
  padding: 25px 0 22px;
  color: var(--muted);
  font-size: 13px;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 2px;
  background: var(--red);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--red);
}

.main-nav a:hover::after,
.main-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
}

.contest-subnav {
  position: sticky;
  top: 72px;
  z-index: 19;
  overflow-x: auto;
  border-bottom: 1px solid rgba(124, 32, 32, 0.2);
  background: var(--red);
  scrollbar-width: none;
}

.contest-subnav::-webkit-scrollbar {
  display: none;
}

.contest-subnav-inner {
  width: max-content;
  min-width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.contest-subnav a {
  padding: 10px 18px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 12px;
  white-space: nowrap;
}

.contest-subnav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin: 0 auto;
}

.section {
  padding: clamp(72px, 9vw, 120px) 0;
  border-bottom: 1px solid var(--line);
}

.section-title {
  max-width: 760px;
  margin: 0 0 24px;
  font-family: var(--font-serif);
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.section-lead {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.kicker {
  display: block;
  margin-bottom: 14px;
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  padding: 11px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

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

.button-primary {
  border-color: var(--red);
  color: #fff;
  background: var(--red);
}

.button-primary:hover {
  border-color: var(--red-dark);
  background: var(--red-dark);
}

.button-secondary {
  color: var(--ink);
  background: transparent;
}

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

.v1-hero {
  min-height: calc(100dvh - 112px);
  padding: clamp(42px, 6vw, 78px) 0;
  display: grid;
  align-items: center;
}

.v1-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: clamp(32px, 6vw, 84px);
  align-items: center;
}

.v1-hero h1 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(40px, 4.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.v1-hero h1 span {
  display: block;
  color: var(--red);
}

.hero-desc {
  max-width: 590px;
  margin: 22px 0 28px;
  color: var(--muted);
  font-size: 16px;
}

.hero-art {
  position: relative;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(124, 32, 32, 0.22);
  background: var(--red-dark);
  box-shadow: 22px 22px 0 var(--paper-deep);
}

.hero-art img {
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.quick-facts {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.quick-facts-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
}

.quick-fact {
  min-height: 124px;
  padding: 25px 28px;
  border-right: 1px solid var(--line);
}

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

.quick-fact strong,
.quick-fact span {
  display: block;
}

.quick-fact strong {
  margin-bottom: 7px;
  font-family: var(--font-serif);
  font-size: 18px;
}

.quick-fact span {
  color: var(--muted);
  font-size: 13px;
}

.timeline-shell {
  margin-top: 48px;
  overflow-x: auto;
  padding-bottom: 12px;
}

.timeline {
  min-width: 900px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 2px solid var(--ink);
}

.timeline-item {
  position: relative;
  padding: 28px 24px 0 0;
}

.timeline-item::before {
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
  content: "";
}

.timeline-item.is-current::before {
  border-color: var(--red);
  background: var(--red);
  box-shadow: 0 0 0 6px rgba(124, 32, 32, 0.12);
}

.timeline-date {
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 11px;
}

.timeline-item h3 {
  margin: 8px 0 5px;
  font-family: var(--font-serif);
  font-size: 19px;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.overview-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(30px, 7vw, 100px);
}

.official-sheet {
  align-self: start;
  border: 1px solid var(--line);
  background: #fff;
}

.official-sheet img {
  width: 100%;
}

.org-list {
  border-top: 3px solid var(--red);
}

.org-row {
  padding: 20px 0;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 22px;
  border-bottom: 1px solid var(--line);
}

.org-row dt {
  color: var(--red);
  font-family: var(--font-serif);
  font-weight: 700;
}

.org-row dd {
  margin: 0;
  color: var(--muted);
}

.track-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  gap: 42px;
}

.track-tabs {
  display: flex;
  flex-direction: column;
  align-self: start;
  border-top: 1px solid var(--line);
}

.track-tab {
  padding: 20px 12px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  color: var(--muted);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.track-tab strong,
.track-tab small {
  display: block;
}

.track-tab strong {
  font-family: var(--font-serif);
  font-size: 18px;
}

.track-tab small {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
}

.track-tab[aria-selected="true"] {
  padding-left: 22px;
  color: #fff;
  background: var(--red);
}

.track-panel {
  min-height: 520px;
  padding: clamp(30px, 5vw, 60px);
  border: 1px solid rgba(124, 32, 32, 0.2);
  background: var(--surface);
}

.track-panel[hidden] {
  display: none;
}

.track-panel h3 {
  max-width: 680px;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
}

.track-panel > p {
  max-width: 760px;
  color: var(--muted);
}

.requirement-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.requirement-block {
  padding-top: 18px;
  border-top: 2px solid var(--ink);
}

.requirement-block h4 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 18px;
}

.requirement-block ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.requirement-block li + li {
  margin-top: 8px;
}

.split-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.split-block {
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  background: var(--surface);
}

.split-block:nth-child(2) {
  color: #f7f1e8;
  background: var(--ink);
}

.split-block h3 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: 26px;
}

.split-block ol,
.split-block ul {
  margin: 0;
  padding-left: 1.2em;
}

.split-block li + li {
  margin-top: 10px;
}

.reward-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(30px, 6vw, 80px);
  align-items: start;
}

.reward-poster {
  border: 1px solid var(--line);
  background: #fff;
}

.award-stack {
  display: grid;
  gap: 12px;
}

.award-line {
  padding: 19px 0;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 26px;
  border-bottom: 1px solid var(--line);
}

.award-line strong {
  color: var(--red);
  font-family: var(--font-serif);
  font-size: 20px;
}

.award-line p {
  margin: 0;
  color: var(--muted);
}

.rule-stack {
  margin-top: 42px;
  border-top: 1px solid var(--line);
}

details {
  border-bottom: 1px solid var(--line);
}

summary {
  padding: 21px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  color: var(--red);
  content: "+";
  font-family: var(--font-mono);
}

details[open] summary::after {
  content: "-";
}

.details-body {
  max-width: 880px;
  padding: 0 0 26px;
  color: var(--muted);
}

.contact-layout {
  margin-top: 50px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact-card {
  padding: clamp(28px, 4vw, 46px);
  border-top: 4px solid var(--red);
  background: var(--surface);
}

.contact-card h3 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: 25px;
}

.contact-card p {
  margin: 8px 0;
  color: var(--muted);
}

.contact-card a {
  color: var(--red);
  font-weight: 700;
}

.mail-helper {
  grid-column: 1 / -1;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--paper-deep);
}

.mail-helper code {
  display: block;
  margin: 12px 0 18px;
  padding: 14px;
  overflow-x: auto;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.65);
  font-family: var(--font-mono);
  font-size: 12px;
}

.gallery-empty {
  margin-top: 48px;
  min-height: 380px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: 50px;
  align-items: end;
  border: 1px solid rgba(124, 32, 32, 0.2);
  background: linear-gradient(135deg, rgba(124, 32, 32, 0.08), transparent 55%), var(--surface);
}

.gallery-empty h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.1;
}

.gallery-empty p {
  margin: 0;
  color: var(--muted);
}

.sponsor-layout {
  margin-top: 52px;
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: clamp(34px, 6vw, 80px);
}

.sponsor-visual {
  border: 1px solid var(--line);
  background: #fff;
}

.sponsor-types {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.sponsor-type {
  padding: 22px;
  background: var(--surface);
}

.sponsor-type strong {
  display: block;
  color: var(--red);
  font-family: var(--font-serif);
  font-size: 18px;
}

.sponsor-type span {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  padding: 54px 0 30px;
  color: #c5c0b7;
  background: #1c1b18;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

.footer-grid h2,
.footer-grid h3 {
  margin: 0 0 12px;
  color: #f5f1e8;
  font-family: var(--font-serif);
}

.footer-grid p {
  margin: 4px 0;
  font-size: 13px;
}

.footer-grid a:hover {
  color: #fff;
}

.footer-bottom {
  margin-top: 36px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #858178;
  font-size: 12px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1), transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Version selector */
.selector-page {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto 1fr;
}

.selector-main {
  padding: clamp(48px, 8vw, 96px) 0;
}

.selector-heading {
  max-width: 850px;
  margin-bottom: 50px;
}

.selector-heading h1 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.1;
}

.selector-heading p {
  max-width: 680px;
  color: var(--muted);
}

.version-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 20px;
}

.version-card {
  position: relative;
  min-height: 510px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  border: 1px solid var(--line);
  color: #fff;
  background: var(--ink);
}

.version-card:first-child {
  color: #fff;
  background: var(--red-dark);
}

.version-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
}

.version-card:first-child img {
  opacity: 0.3;
}

.version-card::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 15%, rgba(28, 27, 24, 0.85));
  content: "";
}

.version-card > *:not(img) {
  position: relative;
  z-index: 1;
}

.version-card h2 {
  max-width: 500px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
}

.version-card p {
  max-width: 520px;
  margin: 12px 0 24px;
  color: inherit;
  opacity: 0.82;
}

/* Faithful PDF version */
.v2-page {
  background: #e8e2d8;
}

.v2-intro {
  padding: 44px 0 32px;
}

.v2-intro-grid {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
}

.v2-intro h1 {
  max-width: 720px;
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.16;
}

.v2-intro p {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
}

.pdf-stack {
  padding: 24px 0 100px;
}

.pdf-chapter {
  padding-top: 38px;
}

.pdf-page {
  position: relative;
  width: min(100%, 880px);
  margin: 0 auto 34px;
  border: 1px solid rgba(26, 26, 26, 0.18);
  background: #fff;
  box-shadow: 0 18px 50px rgba(57, 42, 28, 0.09);
}

.pdf-page::before {
  position: absolute;
  top: 18px;
  right: -54px;
  color: rgba(26, 26, 26, 0.5);
  content: attr(data-page);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.pdf-page img {
  width: 100%;
  height: auto;
}

.generated-module {
  width: min(100%, 880px);
  margin: 0 auto 34px;
  padding: clamp(26px, 5vw, 52px);
  border: 1px solid rgba(124, 32, 32, 0.22);
  background: var(--surface);
}

.generated-module h2 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
}

.generated-module > p {
  color: var(--muted);
}

.v2-contacts {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.v2-contact {
  padding: 24px;
  background: var(--paper);
}

.v2-contact h3 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
}

.v2-contact p {
  margin: 6px 0;
  color: var(--muted);
  font-size: 14px;
}

.work-empty {
  margin-top: 28px;
  min-height: 230px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-top: 4px solid var(--red);
  background: var(--paper-deep);
}

.work-empty strong {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 44px);
}

.work-empty span {
  color: var(--muted);
}

.mobile-action {
  display: none;
}

@media (max-width: 1080px) {
  .main-nav {
    gap: 14px;
  }

  .main-nav a {
    font-size: 12px;
  }

  .v1-hero-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  html {
    scroll-padding-top: 112px;
  }

  .header-inner,
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    right: 16px;
    left: 16px;
    padding: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--line);
    background: var(--paper);
    box-shadow: 0 16px 40px rgba(26, 26, 26, 0.08);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 10px 12px;
  }

  .main-nav a::after {
    display: none;
  }

  .contest-subnav {
    top: 72px;
  }

  .contest-subnav-inner {
    justify-content: flex-start;
  }

  .v1-hero {
    min-height: auto;
  }

  .v1-hero-grid,
  .overview-layout,
  .track-layout,
  .reward-layout,
  .sponsor-layout,
  .version-grid {
    grid-template-columns: 1fr;
  }

  .hero-art {
    order: -1;
    box-shadow: 12px 12px 0 var(--paper-deep);
  }

  .quick-facts-grid {
    grid-template-columns: 1fr 1fr;
  }

  .quick-fact:nth-child(2) {
    border-right: 0;
  }

  .quick-fact:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .track-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    overflow-x: auto;
  }

  .track-tab {
    min-width: 190px;
    border-right: 1px solid var(--line);
  }

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

  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }

  .v2-intro-grid {
    display: grid;
  }

  .v2-intro p {
    max-width: 680px;
  }

  .pdf-page::before {
    display: none;
  }
}

@media (max-width: 640px) {
  .brand-copy strong {
    font-size: 13px;
  }

  .brand-copy small {
    display: none;
  }

  .section {
    padding: 64px 0;
  }

  .v1-hero h1 {
    font-size: 42px;
  }

  .quick-facts-grid,
  .split-layout,
  .requirement-grid,
  .contact-layout,
  .v2-contacts,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .quick-fact,
  .quick-fact:nth-child(2) {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .track-tabs {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: 74%;
  }

  .track-panel {
    min-height: 0;
    padding: 26px 22px;
  }

  .award-line {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .mail-helper {
    grid-column: auto;
  }

  .gallery-empty {
    min-height: 310px;
    padding: 28px;
    grid-template-columns: 1fr;
  }

  .sponsor-types {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    display: grid;
  }

  .version-card {
    min-height: 430px;
    padding: 26px;
  }

  .pdf-stack {
    padding-top: 8px;
  }

  .pdf-chapter {
    padding-top: 18px;
  }

  .mobile-action {
    position: fixed;
    right: 16px;
    bottom: 16px;
    left: 16px;
    z-index: 18;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: var(--red);
    font-family: var(--font-serif);
    font-weight: 700;
    box-shadow: 0 12px 30px rgba(87, 19, 19, 0.25);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .site-header,
  .contest-subnav,
  .mobile-action,
  .site-footer {
    display: none !important;
  }

  .v2-page {
    background: #fff;
  }

  .pdf-page {
    margin: 0;
    break-after: page;
    border: 0;
    box-shadow: none;
  }
}