/* Styles that are only needed on pages with a .hero section (index.qmd).
   Loaded via the page-level `css:` key so other pages don't pay the weight. */

/* ── Hero + navbar state ──────────────────────────────────────────────────────*/

body:has(.hero).nav-fixed,
body.has-hero-navbar.nav-fixed {
  padding-top: 0;
}

body:has(.hero) .hero,
body.has-hero-navbar .hero {
  margin-top: -67px;
  padding-top: calc(67px + clamp(2rem, 4vw, 3.5rem));
}

body:has(.hero) #quarto-header .navbar,
body.has-hero-navbar #quarto-header .navbar {
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-color: transparent;
}

body.has-hero-navbar #quarto-header .navbar-brand-container > .navbar-brand {
  opacity: 0;
  max-width: 0;
  overflow: hidden;
  margin-left: 0;
  padding-left: 0;
  pointer-events: none;
  white-space: nowrap;
  transition:
    opacity 0.2s ease,
    max-width 0.2s ease;
}

body.has-hero-navbar.hero-navbar-scrolled #quarto-header .navbar,
body:has(.hero).hero-navbar-scrolled #quarto-header .navbar {
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

body.has-hero-navbar.hero-navbar-scrolled
  #quarto-header
  .navbar-brand-container
  > .navbar-brand,
body:has(.hero).hero-navbar-scrolled
  #quarto-header
  .navbar-brand-container
  > .navbar-brand {
  opacity: 1;
  max-width: 14rem;
  pointer-events: auto;
}

/* ── Hero layout ──────────────────────────────────────────────────────────────*/

.hero {
  /* Full-bleed band */
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  padding-block: clamp(2rem, 6vw, 3.5rem);
  color: var(--bs-body-color);
  /* Layout */
  position: relative;
  overflow: hidden;
  padding-inline: clamp(1rem, 2vw, 2rem);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-sizing: border-box;
}

.hero h1 {
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.4rem;
  text-shadow: none;
}

.hero-desc {
  display: block;
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: rgba(0, 0, 0, 0.55);
  margin: 0.25rem 0 1.75rem;
}

.hero-tagline {
  display: block;
  font-size: clamp(0.8rem, 1.5vw, 0.95rem);
  letter-spacing: 0.04em;
  color: rgba(0, 0, 0, 0.5);
  margin: 0;
}

.hero-call {
  display: block;
  font-size: clamp(1.2rem, 3vw, 1.9rem);
  font-weight: 700;
  color: rgba(0, 0, 0, 0.7);
  margin: 0 0 0.5rem;
}

.hero .btn {
  margin-top: 1rem;
}

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

/* ── Hero marquee gallery ────────────────────────────────────────────────────*/

.hero-gallery {
  width: 100vw;
  margin-top: clamp(1.5rem, 4vw, 3rem);
  margin-inline: calc(50% - 50vw);
  overflow: hidden;
  background: #fff4c2;
  padding: 0 0 clamp(1rem, 3vw, 1.5rem);
  box-sizing: border-box;
}

.hero-gallery-track {
  display: flex;
  width: max-content;
  gap: 1rem;
  animation: hero-marquee-scroll 48s linear infinite;
  will-change: transform;
}

.hero-gallery-set {
  display: flex;
  gap: 1rem;
  flex: 0 0 auto;
  flex-wrap: nowrap;
}

.hero-gallery-set > img {
  display: block;
  flex: 0 0 auto;
}

.hero-gallery img {
  display: block;
  width: clamp(9rem, 20vw, 16rem);
  height: clamp(7rem, 14vw, 11rem);
  object-fit: cover;
  border-radius: 1rem;
  box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.08);
}

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

@media (prefers-reduced-motion: reduce) {
  .hero-gallery-track {
    animation-play-state: paused;
  }
}

/* ── Hero waveform decoration ─────────────────────────────────────────────────*/

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

.hero-wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%; /* 2× hero width; animation scrolls by -50% for seamless loop */
  height: 160px;
  pointer-events: none;
  user-select: none;
  animation: hero-wave-scroll 40s linear infinite;
}

.hero-wave svg {
  display: block;
  width: 100%;
  height: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .hero-wave {
    animation-play-state: paused;
  }
}

/* ── Program section (sticky day nav + day panels) ───────────────────────────*/

.program-section {
  padding-top: 0 !important;
}

.program-nav {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  position: sticky;
  top: 4.25rem;
  z-index: 200;
  background: #f5efe3;
  border-bottom: 2px solid rgba(0, 0, 0, 0.08);
  box-sizing: border-box;
}

.program-nav-inner {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 2vw, 2rem);
  display: flex;
  align-items: stretch;
  box-sizing: border-box;
}

.program-nav-item {
  flex: 1 1 0;
  min-width: 0;
  padding: 1.1rem clamp(1rem, 3vw, 3rem);
  opacity: 0.4;
  transition:
    background-color 0.3s ease,
    opacity 0.3s ease;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  color: inherit;
  display: block;
}

.program-nav-item:visited {
  color: inherit;
}

.program-nav-item:hover,
.program-nav-item:focus-visible {
  opacity: 1;
  background-color: rgba(255, 244, 194, 0.65);
  outline: none;
}

.program-nav-item > * {
  margin: 0;
}

.program-nav-item h4 {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
}

.program-nav-item h3 {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  margin: 0.15rem 0 0.2rem;
}

.program-nav-item p {
  display: block;
  font-size: 0.82rem;
  color: rgba(0, 0, 0, 0.5);
}

.program-nav-item + .program-nav-item {
  border-left: 1px solid rgba(0, 0, 0, 0.1);
}

.program-nav-item.is-active {
  background-color: #fff4c2;
  opacity: 1;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
  border-right: 1px solid rgba(0, 0, 0, 0.1);
}

.day-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
}

.day-title {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1;
  margin: 0.15rem 0 0.2rem;
}

.day-date {
  display: block;
  font-size: 0.82rem;
  color: rgba(0, 0, 0, 0.5);
}

/* Day content panels */

.program-day {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
  min-height: 80vh;
  padding-block-end: clamp(3rem, 6vw, 5rem);
  padding-inline: clamp(1rem, 2vw, 2rem);
  box-sizing: border-box;
  scroll-margin-top: calc(4.25rem + 1rem);
}

#day1.program-day {
  padding-block-start: 0;
}

.program-day-inner {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 2vw, 2rem);
  box-sizing: border-box;
}

.program-day h3.day-heading,
.program-day > .program-day-inner > h3 {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 800;
  margin: 0 0 0.4rem;
}

.day-intro,
.program-day > .program-day-inner > p {
  font-size: 1.05rem;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 2.5rem;
  max-width: 65ch;
}

/* Tutorial instructor grid */

.instructor-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.instructor-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.45rem;
}

.instructor-card > * {
  margin: 0;
}

.instructor-card .instructor-photo,
.instructor-card img {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 1rem;
  object-fit: cover;
  display: block;
}

.instructor-card .instructor-photo {
  background: linear-gradient(
    135deg,
    rgba(0, 0, 0, 0.05) 0%,
    rgba(0, 0, 0, 0.1) 100%
  );
}

.instructor-card img {
  opacity: 0.35;
  filter: grayscale(1);
}

.instructor-card strong {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--bs-body-color);
}

.instructor-card p {
  font-size: 0.82rem;
  color: rgba(0, 0, 0, 0.5);
}

@media (max-width: 900px) {
  .instructor-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 576px) {
  .instructor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Keynote hero (Day 2) */

.keynote-hero {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-bottom: 3rem;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  background: #fff4c2;
  border-radius: 1.25rem;
}

.keynote-hero > p {
  margin: 0;
}

.keynote-hero img {
  width: clamp(90px, 14vw, 150px);
  height: clamp(90px, 14vw, 150px);
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.keynote-hero-body {
  min-width: 0;
}

.keynote-hero-body > * {
  margin: 0;
}

.keynote-hero-body h4 {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
  margin-bottom: 0.3rem;
}

.keynote-hero-body h3 {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 800;
  margin: 0 0 0.25rem;
  line-height: 1.1;
}

.keynote-hero-body > p:first-of-type {
  font-size: 0.95rem;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 0.75rem;
}

.keynote-hero-body > p:last-of-type {
  font-size: 0.95rem;
  color: rgba(0, 0, 0, 0.7);
  line-height: 1.65;
}

@media (max-width: 600px) {
  .keynote-hero {
    flex-direction: column;
    text-align: center;
  }
}

/* Session overview cards under the keynote */

.session-overview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0 2.25rem;
}

.session-card {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: clamp(1.1rem, 2.4vw, 1.5rem);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 1.25rem;
  box-shadow: 0 0.35rem 1rem rgba(0, 0, 0, 0.05);
}

.session-card > * {
  margin: 0;
}

.session-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.52);
}

.session-card h4 {
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.2;
  text-shadow: none;
}

.session-card p {
  font-size: 0.98rem;
  color: rgba(0, 0, 0, 0.65);
  line-height: 1.6;
}

.speaker-bubbles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: flex-start;
}

.speaker-bubble {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  color: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  min-width: 4.9rem;
  max-width: 6.4rem;
  text-align: center;
}

.speaker-bubble img {
  display: block;
  width: 4.9rem;
  height: 4.9rem;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0.3rem 0.85rem rgba(0, 0, 0, 0.12);
  background: #fff;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.speaker-bubble > * {
  margin: 0;
}

.speaker-bubble > p:last-child {
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.2;
}

.speaker-bubble:hover img,
.speaker-bubble:focus-visible img {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0.45rem 1.15rem rgba(0, 0, 0, 0.16);
}

.speaker-bubble:focus-visible {
  outline: none;
}

.speaker-bubble:focus-visible img {
  box-shadow:
    0 0 0 4px rgba(13, 110, 253, 0.22),
    0 0.45rem 1.15rem rgba(0, 0, 0, 0.16);
}

@media (max-width: 900px) {
  .session-overview {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .speaker-bubbles {
    gap: 0.7rem;
  }

  .speaker-bubble {
    min-width: 4.4rem;
    max-width: 5.6rem;
  }

  .speaker-bubble img {
    width: 4.4rem;
    height: 4.4rem;
  }
}