:root {
  color-scheme: light;
  --font-sans: 'Manrope', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-text: #1b1f24;
  --color-muted: #566370;
  --color-accent: #e87722;
  --color-accent-dark: #c86414;
  --color-accent-soft: rgba(232, 119, 34, 0.12);
  --color-border: #d7dbe2;
  --color-border-strong: #c3c8d1;
  --shadow-soft: 0 10px 30px rgba(17, 24, 39, 0.12);
  --shadow-card: 0 18px 28px rgba(15, 23, 42, 0.12);
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --content-max: 1080px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

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

a:hover,
a:focus {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  margin: 0 auto;
  max-width: var(--content-max);
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.04rem;
  text-transform: uppercase;
  color: var(--color-text);
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: 0.15rem;
}

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
}

.site-nav__toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
}

.site-nav__panel {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav__list {
  display: flex;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  --nav-indicator-width: 0px;
  --nav-indicator-offset: 0px;
  --nav-indicator-opacity: 0;
}

.site-nav__list::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.4rem;
  width: var(--nav-indicator-width);
  height: 3px;
  border-radius: 999px;
  background-color: var(--color-accent);
  opacity: var(--nav-indicator-opacity);
  transform: translateX(var(--nav-indicator-offset, 0px));
  transition: transform 220ms ease, width 220ms ease, opacity 160ms ease;
  pointer-events: none;
}

.site-nav__list--pages {
  padding-right: 1rem;
  margin-right: 1rem;
  border-right: 1px solid var(--color-border);
}

.site-nav__item {
  display: flex;
}

.site-nav__link,
.site-nav__button {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-muted);
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__button:hover,
.site-nav__button:focus-visible {
  border-color: var(--color-border);
  color: var(--color-text);
  text-decoration: none;
}

.site-nav__link.is-active,
.site-nav__item.is-active .site-nav__link,
.site-nav__button.is-active,
.site-nav__item.is-active .site-nav__button {
  color: var(--color-accent-dark);
  background-color: rgba(232, 119, 34, 0.14);
  border-color: rgba(232, 119, 34, 0.4);
}

.site-main {
  margin: 0 auto;
  max-width: var(--content-max);
  padding: 2.25rem 1.5rem 4.5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 1.8rem;
  padding: 2.25rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(125deg, rgba(232, 119, 34, 0.08), rgba(17, 24, 39, 0.04)), var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  margin-bottom: 3.2rem;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero__eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-muted);
}

.hero__title {
  font-size: clamp(1.95rem, 3vw + 1rem, 2.7rem);
  line-height: 1.15;
  margin: 0;
}

.hero__subtitle {
  font-size: 1.03rem;
  margin: 0;
  color: var(--color-text);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.2rem;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.6rem 1.3rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.92rem;
  color: #fff;
  background-color: var(--color-accent);
  border: 1px solid var(--color-accent-dark);
  box-shadow: 0 12px 24px rgba(232, 119, 34, 0.18);
  transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

.hero__cta:hover,
.hero__cta:focus {
  transform: translateY(-1px);
  box-shadow: 0 16px 28px rgba(232, 119, 34, 0.22);
  text-decoration: none;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  font-size: 0.93rem;
  color: var(--color-muted);
}

.hero__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--color-border);
}

.hero__meta.is-hidden {
  display: none;
}

.hero__support {
  background-color: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 1.6rem 1.9rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.support__title {
  margin: 0 0 0.85rem;
  font-size: 1rem;
  font-weight: 700;
}

.support__body {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-muted);
}

.hero__support--logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  gap: 0.8rem;
}

.hero__support-logo {
  max-width: 100%;
  height: auto;
  display: block;
}

.hero__support-credit {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-muted);
  text-align: center;
  line-height: 1.4;
}

.season {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-bottom: 3.5rem;
}

.season__header {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.season__title {
  margin: 0;
  font-size: 1.5rem;
  letter-spacing: 0.01em;
}

.season__description {
  margin: 0;
  font-size: 1rem;
  color: var(--color-muted);
}

.season-index {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
  margin-bottom: 3.8rem;
}

.season-index__header {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.season-index__title {
  margin: 0;
  font-size: 1.55rem;
}

.season-index__description {
  margin: 0;
  font-size: 1rem;
  color: var(--color-muted);
}

.season-index__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
}

.how-we-work {
  margin: 0 auto 4rem;
  width: 100%;
  padding: 0;
}

.how-we-work__inner {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 2.4rem;
  box-shadow: var(--shadow-soft);
}

.how-we-work__title {
  margin: 0 0 0.75rem;
  font-size: 1.4rem;
  font-weight: 700;
}

.how-we-work__body {
  margin: 0;
  font-size: 1rem;
  color: var(--color-muted);
  line-height: 1.6;
}

.season-card {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.6rem;
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.season-card:hover,
.season-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 18px 32px rgba(15, 23, 42, 0.16);
}

.season-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.season-card__status {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.season-card__status--active {
  color: var(--color-accent-dark);
}

.season-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.season-card__title {
  margin: 0;
  font-size: 1.2rem;
}

.season-card__summary {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.season-card__link {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-accent-dark);
  width: fit-content;
}

.season-card__link:hover,
.season-card__link:focus {
  color: var(--color-text);
  text-decoration: underline;
}

.season-card--placeholder {
  border-style: dashed;
  background-color: rgba(255, 255, 255, 0.8);
}

.season-card--placeholder .season-card__summary {
  color: var(--color-muted);
}

.presentation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.presentation-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.presentation-card:hover,
.presentation-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 20px 34px rgba(15, 23, 42, 0.15);
}

.presentation-card__image {
  position: relative;
  padding-top: 56.25%;
  background-color: var(--color-accent-soft);
  background-size: cover;
  background-position: center;
  display: block;
  text-decoration: none;
}

.presentation-card__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27, 31, 36, 0.12) 0%, rgba(27, 31, 36, 0.45) 100%);
  opacity: 0;
  transition: opacity 200ms ease;
}

.presentation-card:hover .presentation-card__image::after,
.presentation-card:focus-within .presentation-card__image::after {
  opacity: 1;
}

.presentation-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding: 1.45rem;
}

.presentation-card__title {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.4;
}

.presentation-card__title-link {
  color: inherit;
  text-decoration: none;
}

.presentation-card__title-link:hover,
.presentation-card__title-link:focus {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

.presentation-card__meta {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.presentation-card__meta-item {
  display: inline;
}

.presentation-card__meta-link {
  color: var(--color-accent-dark);
  font-weight: 600;
  text-decoration: none;
}

.presentation-card__meta-link:hover,
.presentation-card__meta-link:focus {
  text-decoration: underline;
}

.presentation-card__summary {
  margin: 0;
  font-size: 0.95rem;
}

.presentation-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.presentation-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.42rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background-color: var(--color-accent-soft);
  border: 1px solid rgba(232, 119, 34, 0.4);
  transition: background-color 160ms ease, color 160ms ease;
}

.presentation-card__link:hover,
.presentation-card__link:focus {
  background-color: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

.presentation-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.presentation-card__tag {
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background-color: rgba(27, 31, 36, 0.06);
  color: var(--color-muted);
}

.presentation-card--placeholder {
  border-style: dashed;
  box-shadow: none;
  background-color: rgba(255, 255, 255, 0.75);
}

.presentation-card--placeholder .presentation-card__body {
  align-items: flex-start;
}

.about {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
  padding: 2.2rem;
  margin-bottom: 3.5rem;
}

.about[hidden] {
  display: none !important;
}

.about__content {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 1.8rem;
  align-items: start;
}

.about__narrative {
  grid-column: 1 / -1;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.about__title {
  margin: 0 0 1rem;
  font-size: 1.6rem;
}

.about__body {
  margin: 0;
  font-size: 1.02rem;
  color: var(--color-text);
}

.about__organizers {
  border-left: 2px solid var(--color-border-strong);
  padding-left: 1.3rem;
}

.about__subtitle {
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-accent-dark);
}

.about__grid {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.organizer-card {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1rem;
  padding: 1.4rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.organizer-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.organizer-card__photo {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(232, 119, 34, 0.35);
  background-color: rgba(232, 119, 34, 0.08);
}

.organizer-card__photo--placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.8rem;
  color: rgba(27, 31, 36, 0.7);
}

.organizer-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.organizer-card__name {
  margin: 0;
  font-size: 1.05rem;
}

.organizer-card__name a {
  color: inherit;
  text-decoration: none;
}

.organizer-card__name a:hover,
.organizer-card__name a:focus {
  text-decoration: underline;
  color: var(--color-accent-dark);
}

.organizer-card__affiliation {
  margin: 0;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.organizer-card__bio {
  margin: 0;
  font-size: 0.94rem;
  color: var(--color-text);
}

.organizer-card--placeholder {
  grid-template-columns: 1fr;
  text-align: center;
}

.organizer-card--placeholder .organizer-card__body {
  align-items: center;
}

.sponsors {
  padding: 3.5rem 0 4rem;
}

.sponsors__inner {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  padding: 2.4rem 2.2rem;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
}

.sponsors__title {
  margin: 0;
  font-size: 1.45rem;
}

.sponsors__intro {
  margin: 0.6rem 0 2rem;
  font-size: 1rem;
  color: var(--color-muted);
}

.sponsors__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.sponsor-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: rgba(248, 249, 252, 0.9);
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  text-align: center;
}

.sponsor-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 180px;
}

.sponsor-card__logo {
  width: 100%;
  max-height: 70px;
  object-fit: contain;
  filter: saturate(1.1);
}

.sponsor-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sponsor-card__link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent-dark);
}

.sponsor-card__link:hover,
.sponsor-card__link:focus {
  color: var(--color-text);
  text-decoration: underline;
}

.sponsor-card__name {
  margin: 0;
  font-weight: 600;
  font-size: 0.95rem;
}

.sponsor-card__note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.sponsor-card--placeholder {
  background-color: rgba(232, 119, 34, 0.06);
  border-style: dashed;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 1.5rem 3rem;
  background-color: rgba(255, 255, 255, 0.9);
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
}

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero__support {
    order: -1;
  }

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

  .about__organizers {
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: 1.6rem;
  }

  .organizer-card {
    grid-template-columns: 72px 1fr;
  }

  .organizer-card__photo,
  .organizer-card__photo--placeholder {
    width: 72px;
    height: 72px;
  }
}

.site-nav__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-accent-dark);
  background-color: var(--color-accent);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
  box-shadow: 0 12px 22px rgba(232, 119, 34, 0.18);
}

.site-nav__action:hover,
.site-nav__action:focus {
  transform: translateY(-1px);
  box-shadow: 0 16px 26px rgba(232, 119, 34, 0.22);
  background-color: var(--color-accent-dark);
  text-decoration: none;
}

.site-nav__action.is-disabled {
  cursor: not-allowed;
  background-color: rgba(86, 99, 112, 0.25);
  border-color: rgba(86, 99, 112, 0.45);
  color: rgba(27, 31, 36, 0.6);
  box-shadow: none;
}

.site-nav__action.is-disabled:hover,
.site-nav__action.is-disabled:focus {
  transform: none;
  box-shadow: none;
  text-decoration: none;
}

@media (max-width: 920px) {
  .site-nav__toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }

  .site-nav__panel {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--color-surface);
    padding: 1.1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 18px 28px rgba(15, 23, 42, 0.18);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 160ms ease, transform 160ms ease;
    min-width: 220px;
  }

  .site-nav__list::after {
    display: none;
  }

  .site-nav__panel.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav__list--pages {
    padding-right: 0;
    margin-right: 0;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.6rem;
    margin-bottom: 0.6rem;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0.6rem;
  }

  .site-nav__item {
    width: 100%;
  }

  .site-nav__link,
  .site-nav__button {
    width: 100%;
    justify-content: flex-start;
  }

  .site-nav__action {
    width: 100%;
    justify-content: center;
  }

  .hero {
    padding: 1.9rem;
  }

  .site-main {
    padding: 2rem 1.1rem 3.5rem;
  }

  .about {
    padding: 1.9rem;
  }

  .sponsors__inner {
    padding: 2rem 1.6rem;
  }

  .organizer-card {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .organizer-card__media {
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .site-logo {
    font-size: 1rem;
  }

  .hero__title {
    font-size: 2.1rem;
  }

  .presentation-card__body {
    padding: 1.2rem;
  }
}