/* Skip link & main landmark */
#gk-main {
  scroll-margin-top: var(--gk-nav-h);
}

.gk-skip-link {
  position: absolute;
  top: -100px;
  left: var(--gk-sp-4);
  background-color: var(--gk-ink);
  color: var(--gk-paper);
  padding: var(--gk-sp-3) var(--gk-sp-4);
  border-radius: var(--gk-radius-md);
  z-index: 200;
  font-weight: var(--gk-fw-bold);
}

.gk-skip-link:focus,
.gk-skip-link:focus-visible {
  top: var(--gk-sp-3);
  text-decoration: none;
}

/* Loading state on body */
body.gk-loading {
  cursor: progress;
}

/* Nav (banner) */
.gk-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--gk-paper);
  border-bottom: 2px solid var(--gk-ink);
  min-height: var(--gk-nav-h);
  display: flex;
  align-items: stretch;
}

.gk-nav-wrapper {
  display: flex;
  align-items: center;
  gap: var(--gk-sp-3);
  width: 100%;
  max-width: var(--gk-maxw);
  margin: 0 auto;
  padding: var(--gk-sp-2) var(--gk-sp-4);
  flex-wrap: nowrap;
}

.gk-nav-list {
  display: flex;
  align-items: center;
  gap: var(--gk-sp-2);
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}

.gk-nav-item {
  display: inline-flex;
  align-items: center;
  padding: var(--gk-sp-2) var(--gk-sp-3);
  border: 2px solid transparent;
  border-radius: var(--gk-radius-sm);
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-medium);
  font-size: clamp(0.875rem, 0.8vw + 0.5rem, 1rem);
  white-space: nowrap;
  cursor: pointer;
  background: none;
  transition:
    background-color var(--gk-transition),
    border-color var(--gk-transition);
}

.gk-nav-item:hover {
  background-color: var(--gk-yellow-pastel);
  text-decoration: none;
}

.gk-nav-item-active {
  border-color: var(--gk-ink);
  background-color: var(--gk-yellow);
}

.gk-nav-item-external::after {
  content: ' ↗';
  font-size: 0.85em;
  opacity: 0.7;
}

.gk-nav-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--gk-sp-2) var(--gk-sp-5);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-red);
  color: var(--gk-paper);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  font-size: clamp(0.875rem, 0.8vw + 0.5rem, 1rem);
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--gk-shadow-button);
  transition:
    transform var(--gk-transition),
    box-shadow var(--gk-transition);
  flex-shrink: 0;
}

.gk-nav-cta:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--gk-shadow-button-hover);
  text-decoration: none;
}

.gk-nav-cta.gk-nav-cta-discount {
  background-color: var(--gk-yellow);
  color: var(--gk-ink);
}

.gk-nav-langs {
  display: inline-flex;
  align-items: center;
  gap: var(--gk-sp-1);
  padding-inline: var(--gk-sp-2);
  border-left: 1px solid var(--gk-line);
  flex-shrink: 0;
}

.gk-nav-lang {
  padding: var(--gk-sp-1) var(--gk-sp-2);
  border: 1px solid transparent;
  border-radius: var(--gk-radius-sm);
  background: none;
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-tiny);
  font-weight: var(--gk-fw-medium);
  cursor: pointer;
  transition: background-color var(--gk-transition);
}

.gk-nav-lang:hover {
  background-color: var(--gk-blue-pastel);
}

.gk-nav-lang-active {
  border-color: var(--gk-ink);
  background-color: var(--gk-blue);
  color: var(--gk-paper);
}

.gk-nav-more-wrapper {
  position: relative;
  flex-shrink: 0;
}

.gk-nav-more {
  padding: var(--gk-sp-2) var(--gk-sp-3);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-paper);
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-medium);
  font-size: var(--gk-fs-small);
  cursor: pointer;
}

.gk-nav-more[aria-expanded='true'] {
  background-color: var(--gk-yellow);
}

.gk-nav-more-list {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 200px;
  padding: var(--gk-sp-2);
  background-color: var(--gk-paper);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  box-shadow: var(--gk-shadow-card);
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-1);
  z-index: 110;
}

.gk-nav-more-list[hidden] {
  display: none;
}

.gk-nav-more-list .gk-nav-item {
  justify-content: flex-start;
  width: 100%;
}

/* Hero */
.gk-hero {
  background: linear-gradient(180deg, var(--gk-blue-pastel) 0%, var(--gk-paper) 100%);
  border-bottom: 2px solid var(--gk-ink);
  padding: var(--gk-sp-6) var(--gk-sp-4);
}

.gk-hero-inner {
  max-width: var(--gk-maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-4);
  align-items: flex-start;
  text-align: left;
}

.gk-hero-title {
  font-size: var(--gk-fs-hero);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  line-height: 1.05;
  color: var(--gk-ink);
  margin: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

.gk-hero-date,
.gk-hero-venue {
  font-size: var(--gk-fs-h3);
  font-weight: var(--gk-fw-medium);
  color: var(--gk-ink);
  margin: 0;
}

.gk-hero-venue {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--gk-sp-2);
}

.gk-hero-venue-map {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--gk-ink);
  text-decoration: none;
  line-height: 1;
  border-radius: var(--gk-radius-sm);
  padding: 2px;
  transition:
    color var(--gk-transition),
    transform var(--gk-transition);
}

.gk-hero-venue-map:hover,
.gk-hero-venue-map:focus-visible {
  color: var(--gk-red);
  transform: translateY(-2px);
}

.gk-hero-venue-map:focus-visible {
  outline: 2px solid var(--gk-blue);
  outline-offset: 2px;
}

.gk-hero-venue-map-icon {
  width: 1.25em;
  height: 1.25em;
  display: block;
}

.gk-hero-action-group {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  width: fit-content;
  max-width: 100%;
  gap: var(--gk-sp-3);
  margin-top: var(--gk-sp-2);
}

.gk-hero-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--gk-sp-3);
  width: 100%;
}

.gk-hero-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--gk-sp-3) var(--gk-sp-6);
  border: 3px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-red);
  color: var(--gk-paper);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  font-size: var(--gk-fs-h3);
  box-shadow: var(--gk-shadow-card);
  cursor: pointer;
  transition:
    transform var(--gk-transition),
    box-shadow var(--gk-transition);
  white-space: nowrap;
}

.gk-hero-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--gk-shadow-card-hover);
  text-decoration: none;
}

.gk-hero-cta.gk-hero-cta-discount {
  background-color: var(--gk-yellow);
  color: var(--gk-ink);
}

.gk-hero-countdown {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gk-sp-2);
  width: 100%;
  box-sizing: border-box;
  font-family: var(--gk-font-mono);
  font-size: var(--gk-fs-body);
  color: var(--gk-ink);
  padding: var(--gk-sp-2) var(--gk-sp-3);
  border: 2px dashed var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-yellow-pastel);
  box-shadow: 2px 2px 0 var(--gk-ink);
}

.gk-hero-countdown:empty {
  display: none;
}

.gk-hero-thanks {
  width: 100%;
  margin-top: var(--gk-sp-5);
}

.gk-hero-thanks .gk-marquee-copy > * {
  width: 150px;
}

@media (min-width: 900px) {
  .gk-hero {
    padding: var(--gk-sp-6) var(--gk-sp-4);
  }

  .gk-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    grid-template-rows: auto auto auto 1fr;
    grid-template-areas:
      'title     thanks'
      'date      thanks'
      'venue     thanks'
      'actions   thanks';
    column-gap: var(--gk-sp-6);
    row-gap: var(--gk-sp-4);
    align-items: start;
  }

  .gk-hero-title {
    grid-area: title;
  }

  .gk-hero-date {
    grid-area: date;
  }

  .gk-hero-venue {
    grid-area: venue;
  }

  .gk-hero-action-group {
    grid-area: actions;
    margin-top: 0;
    justify-self: start;
    align-self: start;
  }

  .gk-hero-thanks {
    grid-area: thanks;
    align-self: end;
    margin-top: 0;
  }

  .gk-hero-thanks .gk-marquee-copy > * {
    width: 200px;
  }
}

/* Section */
.gk-section,
[data-section-id]:not(#gk-hero),
:target:not(#gk-hero) {
  scroll-margin-top: var(--gk-nav-h);
}

.gk-section {
  max-width: var(--gk-maxw);
  margin: 0 auto;
  padding: var(--gk-sp-7) var(--gk-sp-4);
}

.gk-section-hidden {
  display: none;
}

.gk-section-title {
  font-size: var(--gk-fs-h2);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  color: var(--gk-ink);
  margin-bottom: var(--gk-sp-6);
  padding-bottom: var(--gk-sp-2);
  border-bottom: 3px solid var(--gk-ink);
  scroll-margin-top: var(--gk-nav-h);
}

.gk-section-title:empty {
  display: none;
}

/* Home cards */
.gk-home-cards-section {
  margin-top: var(--gk-sp-6);
}

.gk-home-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gk-sp-4);
}

/* Footer */
.gk-footer {
  margin-top: var(--gk-sp-8);
  padding: var(--gk-sp-6) var(--gk-sp-4);
  border-top: 2px solid var(--gk-ink);
  background-color: var(--gk-paper);
  color: var(--gk-ink);
}

.gk-footer > * {
  max-width: var(--gk-maxw);
  margin-left: auto;
  margin-right: auto;
}

.gk-footer-links,
.gk-footer-secondary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-sp-3);
  justify-content: center;
  margin-bottom: var(--gk-sp-4);
}

.gk-footer-link,
.gk-footer-secondary-link {
  color: var(--gk-ink);
  font-size: var(--gk-fs-small);
  padding: var(--gk-sp-1) var(--gk-sp-2);
}

.gk-footer-copyright {
  text-align: center;
  font-size: var(--gk-fs-tiny);
  color: var(--gk-ink);
  opacity: 0.75;
  border-top: 1px solid var(--gk-line);
  padding-top: var(--gk-sp-3);
}

/* Share page noscript fallback */
.gk-share-fallback {
  max-width: var(--gk-maxw);
  margin: var(--gk-sp-6) auto;
  padding: var(--gk-sp-5) var(--gk-sp-4);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-paper);
}

.gk-noscript {
  text-align: center;
  padding: var(--gk-sp-5) var(--gk-sp-4);
  background-color: var(--gk-yellow-pastel);
  color: var(--gk-ink);
  border-top: 2px solid var(--gk-ink);
  border-bottom: 2px solid var(--gk-ink);
}

/* Mobile (< 1100px) */
@media (max-width: 1099px) {
  .gk-nav {
    position: sticky;
  }

  .gk-nav-wrapper {
    justify-content: flex-start;
  }

  .gk-nav-list,
  .gk-nav-more-wrapper {
    display: none;
  }

  /* Home + CTA 靠左，語言切換靠右 */
  .gk-nav-langs {
    margin-left: auto;
  }

  body {
    padding-bottom: calc(var(--gk-nav-mobile-bar-h, 64px) + env(safe-area-inset-bottom, 0px));
  }

  .gk-section {
    padding: var(--gk-sp-6) var(--gk-sp-4);
  }
}

/* Desktop (>= 1100px) — hide mobile-only nodes */
@media (min-width: 1100px) {
  .gk-nav-mobile-bar,
  .gk-nav-mobile-drawer,
  .gk-nav-mobile-backdrop,
  .gk-nav-mobile-home {
    display: none !important;
  }
}

/* --- Mobile home button (top bar) --- */
.gk-nav-mobile-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-paper);
  color: var(--gk-ink);
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: var(--gk-shadow-button);
  transition:
    transform var(--gk-transition),
    box-shadow var(--gk-transition);
}

.gk-nav-mobile-home:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--gk-shadow-button-hover);
}

.gk-nav-mobile-home .gk-nav-mobile-tab-icon {
  width: 20px;
  height: 20px;
}

/* --- Mobile tab bar (fixed at bottom) --- */
.gk-nav-mobile-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  align-items: stretch;
  background-color: var(--gk-paper);
  border-top: 2px solid var(--gk-ink);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.gk-nav-mobile-tab {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 56px;
  padding: var(--gk-sp-2) var(--gk-sp-1);
  border: 0;
  background: none;
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-tiny);
  font-weight: var(--gk-fw-medium);
  cursor: pointer;
  transition: background-color var(--gk-transition);
}

.gk-nav-mobile-tab + .gk-nav-mobile-tab {
  border-left: 1px solid var(--gk-line);
}

.gk-nav-mobile-tab-icon {
  width: 22px;
  height: 22px;
  display: block;
}

.gk-nav-mobile-tab-label {
  line-height: 1.1;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gk-nav-mobile-tab-active {
  background-color: var(--gk-yellow);
  font-weight: var(--gk-fw-bold);
}

/* --- Mobile drawer (「更多」bottom sheet) --- */
.gk-nav-mobile-backdrop {
  position: fixed;
  inset: 0;
  z-index: 105;
  background-color: rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--gk-transition);
}

.gk-nav-mobile-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.gk-nav-mobile-drawer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 110;
  background-color: var(--gk-paper);
  border-top: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md) var(--gk-radius-md) 0 0;
  padding: var(--gk-sp-4);
  padding-bottom: calc(var(--gk-nav-mobile-bar-h, 64px) + env(safe-area-inset-bottom, 0px) + var(--gk-sp-4));
  box-shadow: var(--gk-shadow-card);
  transform: translateY(100%);
  transition: transform var(--gk-transition);
}

.gk-nav-mobile-drawer-open {
  transform: translateY(0);
}

.gk-nav-mobile-drawer-list {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-2);
}

.gk-nav-mobile-drawer .gk-nav-item {
  width: 100%;
  justify-content: flex-start;
  font-size: var(--gk-fs-body);
  padding: var(--gk-sp-3) var(--gk-sp-4);
}

body.gk-scroll-locked {
  overflow: hidden;
}

/* Hero: 手機端 (< 900px) 縮小上下 padding；≥ 900px 沿用預設 sp-8 */
@media (max-width: 899px) {
  .gk-hero {
    padding: var(--gk-sp-6) var(--gk-sp-4);
  }
}

/* --- List / button reset --- */
ul,
ol {
  padding-left: var(--gk-sp-5);
}

button {
  font-family: inherit;
  color: inherit;
}

/* --- Section: about --- */
.gk-about-section-wrapper {
  --gk-about-columns: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gk-sp-6);
}

.gk-about-section {
  --gk-about-span: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gk-sp-5);
  align-items: center;
  padding: var(--gk-sp-5);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-paper);
  box-shadow: var(--gk-shadow-card);
}

@media (min-width: 768px) {
  .gk-about-section-wrapper {
    grid-template-columns: repeat(var(--gk-about-columns), minmax(0, 1fr));
  }
  .gk-about-section {
    grid-column: span min(var(--gk-about-span), var(--gk-about-columns));
  }
  .gk-about-section.gk-about-full.gk-about-has-image {
    grid-template-columns: 1fr 1fr;
  }
  .gk-about-full.gk-about-image-left .gk-about-media {
    order: -1;
  }
  .gk-about-full.gk-about-image-right .gk-about-media {
    order: 1;
  }
}

.gk-about-media {
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-paper);
  overflow: hidden;
}

.gk-about-image {
  width: 100%;
  height: auto;
  display: block;
}

.gk-about-text {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-3);
}

.gk-about-title {
  font-size: var(--gk-fs-h3);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  color: var(--gk-ink);
}

.gk-about-body {
  font-size: var(--gk-fs-body);
  color: var(--gk-ink);
}

.gk-about-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gk-sp-3);
  margin-top: var(--gk-sp-3);
}

.gk-about-link {
  display: inline-flex;
  align-items: center;
  padding: var(--gk-sp-2) var(--gk-sp-4);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-paper);
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  font-size: var(--gk-fs-small);
  box-shadow: var(--gk-shadow-button);
  text-decoration: none;
  transition:
    transform var(--gk-transition),
    box-shadow var(--gk-transition);
}

.gk-about-link:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--gk-shadow-button-hover);
  text-decoration: none;
}

/* --- Section: sponsor marquee --- */
.gk-sponsor-marquee-section {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-4);
}

.gk-marquee-title {
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-h3);
  font-weight: var(--gk-fw-bold);
  color: var(--gk-ink);
}

.gk-marquee {
  position: relative;
  overflow: hidden;
  width: 100%;
  background-color: var(--gk-ink);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  padding: var(--gk-sp-4) 0;
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.gk-marquee-track {
  display: flex;
  align-items: stretch;
  width: max-content;
  animation: gk-marquee-scroll var(--gk-marquee-duration, 40s) linear infinite;
  animation-direction: var(--gk-marquee-direction, normal);
}

.gk-marquee-copy {
  display: flex;
  align-items: stretch;
  gap: var(--gk-sp-4);
  padding-inline: var(--gk-sp-2);
  flex-shrink: 0;
}

.gk-marquee-copy > * {
  flex-shrink: 0;
  width: 240px;
}

@keyframes gk-marquee-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

.gk-marquee-pause-on-hover:hover .gk-marquee-track,
.gk-marquee-pause-on-hover:focus-within .gk-marquee-track {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .gk-marquee {
    overflow-x: auto;
  }
  .gk-marquee-track {
    animation: none;
    width: auto;
  }
}

/* --- Section: thanks / booths grids --- */
.gk-thanks-section,
.gk-booths-section {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-6);
}

.gk-ballot-group,
.gk-logo-group {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-4);
}

.gk-ballot-grid {
  display: grid;
  gap: var(--gk-sp-4);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .gk-ballot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .gk-ballot-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.gk-logo-grid {
  display: grid;
  gap: var(--gk-sp-4);
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

@media (min-width: 768px) {
  .gk-logo-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (min-width: 1280px) {
  .gk-logo-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

/* --- Section: staff --- */
.gk-staff-section {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-4);
}

.gk-staff-grid {
  display: grid;
  gap: var(--gk-sp-4);
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

@media (min-width: 768px) {
  .gk-staff-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

.gk-staff-empty,
.gk-agenda-empty,
.gk-speakers-empty {
  padding: var(--gk-sp-5);
  text-align: center;
  color: var(--gk-ink);
  opacity: 0.7;
  border: 1px dashed var(--gk-ink);
  border-radius: var(--gk-radius-md);
}

/* --- Section: virtual space --- */
.gk-virtual-section {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-4);
}

.gk-virtual-title {
  font-family: var(--gk-font-display);
  font-size: var(--gk-fs-h3);
  font-weight: var(--gk-fw-bold);
}

.gk-virtual-description {
  font-size: var(--gk-fs-body);
}

.gk-virtual-enter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--gk-sp-3) var(--gk-sp-5);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-blue);
  color: var(--gk-paper);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  box-shadow: var(--gk-shadow-button);
  align-self: flex-start;
}

.gk-virtual-enter:hover {
  text-decoration: none;
  transform: translate(-1px, -1px);
  box-shadow: var(--gk-shadow-button-hover);
}

.gk-virtual-iframe {
  width: 100%;
  min-height: 480px;
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-paper);
}

.gk-virtual-notes {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-2);
  padding-left: var(--gk-sp-5);
  font-size: var(--gk-fs-small);
}

/* --- Home cards extras --- */
.gk-home-card-hint {
  font-size: var(--gk-fs-small);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-medium);
  color: var(--gk-ink);
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- Load error --- */
.gk-load-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gk-sp-4);
  padding: var(--gk-sp-7) var(--gk-sp-4);
  text-align: center;
}

.gk-load-error-message {
  font-size: var(--gk-fs-h3);
  color: var(--gk-ink);
}

.gk-load-error-retry {
  padding: var(--gk-sp-3) var(--gk-sp-5);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-yellow);
  color: var(--gk-ink);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  cursor: pointer;
  box-shadow: var(--gk-shadow-button);
}

.gk-load-error-retry:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--gk-shadow-button-hover);
}

/* --- Hero countdown internals --- */
.gk-countdown-unit {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  width: 100%;
  padding: var(--gk-sp-2) var(--gk-sp-2);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-paper);
  font-family: var(--gk-font-mono);
  box-shadow: 2px 2px 0 var(--gk-ink);
  box-sizing: border-box;
}

.gk-countdown-value {
  font-size: clamp(1.25rem, 2vw + 0.5rem, 1.875rem);
  font-weight: var(--gk-fw-bold);
  color: var(--gk-ink);
  line-height: 1.1;
}

.gk-countdown-label {
  font-size: var(--gk-fs-tiny);
  color: var(--gk-ink);
  opacity: 0.85;
  margin-top: 2px;
  font-weight: var(--gk-fw-medium);
  white-space: nowrap;
}

.gk-countdown-started {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--gk-sp-2) var(--gk-sp-4);
  background-color: var(--gk-red);
  color: var(--gk-paper);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
}

/* --- Skeleton placeholders --- */
@keyframes gk-skeleton-pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

.gk-skeleton-grid {
  display: grid;
  gap: var(--gk-sp-4);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .gk-skeleton-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .gk-skeleton-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.gk-skeleton-list {
  display: flex;
  flex-direction: column;
  gap: var(--gk-sp-3);
}

.gk-skeleton-card {
  border: 2px solid var(--gk-line);
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-line);
  animation: gk-skeleton-pulse 1.6s ease-in-out infinite;
}

.gk-skeleton-card-person {
  aspect-ratio: 3 / 4;
}

.gk-skeleton-card-ballot {
  aspect-ratio: 4 / 5;
}

.gk-skeleton-row {
  height: 64px;
  border-radius: var(--gk-radius-md);
  background-color: var(--gk-line);
  animation: gk-skeleton-pulse 1.6s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .gk-skeleton-card,
  .gk-skeleton-row {
    animation: none;
    opacity: 0.75;
  }
}

/* --- Group headers (speakers / logo / ballot signage) --- */
.gk-speakers-group-header,
.gk-logo-group-header,
.gk-ballot-group-header {
  display: flex;
  align-items: center;
  gap: var(--gk-sp-3);
  padding: var(--gk-sp-2) var(--gk-sp-4);
  background-color: var(--gk-yellow-halftone);
  border: 2px solid var(--gk-ink);
  border-radius: var(--gk-radius-sm);
  box-shadow: var(--gk-shadow-button);
  color: var(--gk-ink);
}

.gk-speakers-group-title,
.gk-logo-group-header-title,
.gk-ballot-group-header-title {
  font-family: var(--gk-font-display);
  font-weight: var(--gk-fw-bold);
  font-size: var(--gk-fs-h3);
  line-height: 1.2;
  color: inherit;
}

/* --- Thanks / sponsor marquee shadow toggle --- */
.gk-thanks-section.is-shadow-off .gk-ballot-card,
.gk-sponsor-marquee-section.is-shadow-off .gk-ballot-card {
  box-shadow: none;
}

.gk-thanks-section.is-shadow-off .gk-ballot-card[role='button']:hover,
.gk-thanks-section.is-shadow-off .gk-ballot-card[role='button']:focus-visible,
.gk-sponsor-marquee-section.is-shadow-off .gk-ballot-card[role='button']:hover,
.gk-sponsor-marquee-section.is-shadow-off .gk-ballot-card[role='button']:focus-visible {
  box-shadow: none;
}

/* --- Empty states --- */
.gk-thanks-empty,
.gk-booths-empty {
  padding: var(--gk-sp-5);
  text-align: center;
  color: var(--gk-ink);
  opacity: 0.7;
  border: 1px dashed var(--gk-ink);
  border-radius: var(--gk-radius-md);
}

/* --- Home cards variants --- */
.gk-home-external-card {
  cursor: pointer;
  padding: var(--gk-sp-4);
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- Calendar buttons: .ics variant --- */
.gk-calendar-button-ics {
  background-color: var(--gk-paper);
  color: var(--gk-ink);
}

/* --- Modal text sections --- */
.gk-modal-bio {
  font-size: var(--gk-fs-body);
  line-height: 1.7;
  color: var(--gk-ink);
}

.gk-modal-session-abstract {
  font-size: var(--gk-fs-body);
  line-height: 1.7;
  color: var(--gk-ink);
}

/* --- Image viewer zoom label --- */
.gk-image-viewer-zoom {
  padding: var(--gk-sp-1) var(--gk-sp-3);
  border-radius: var(--gk-radius-sm);
  background-color: var(--gk-paper);
  color: var(--gk-ink);
  font-family: var(--gk-font-mono);
  font-size: var(--gk-fs-small);
}

/* --- Virtual notes list items --- */
.gk-virtual-note {
  color: var(--gk-ink);
}

/* --- Person card modifier (used with .gk-card) --- */
.gk-person-card {
  cursor: pointer;
}