:root {
  --ink: #0c0c0e;
  --paper: #fbfaf8;
  --paper-2: #f2f0eb;
  --accent: #4d3df7;
  --accent-ink: #372bb0;
  --accent-2: #ff5a2b;
  --muted: #68666f;
  --border: #e2dfd8;
  --border-strong: #cfccc3;

  --font-display: 'Fraunces', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --container: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.05;
  margin: 0;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1rem;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 200;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ============ Shell / container ============ */
.shell {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.content-col {
  max-width: 760px;
}

/* ============ Nav ============ */
.adapt-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 1.4rem var(--gutter) 0;
  transition: padding 0.35s ease, background 0.35s ease, border-color 0.35s ease;
  mix-blend-mode: normal;
}

.adapt-nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.35s ease;
}

.adapt-nav.is-scrolled {
  padding-top: 0.8rem;
  background: rgba(251, 250, 248, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.adapt-nav.is-scrolled .adapt-nav__inner {
  border-color: var(--border);
}

.adapt-nav__brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
}

.adapt-nav__brand img {
  height: clamp(6rem, 10vw, 8rem);
  width: auto;
  display: block;
}

.adapt-nav__menu ol {
  list-style: none;
  display: flex;
  gap: clamp(0.9rem, 2vw, 1.9rem);
  margin: 0;
  padding: 0;
}

.adapt-nav__menu a {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  padding: 0.3rem 0;
  position: relative;
}

.adapt-nav__menu a .num {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.7rem;
}

.adapt-nav__menu a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: var(--ink);
  transition: width 0.25s ease;
}

.adapt-nav__menu a:hover::after {
  width: 100%;
}

.adapt-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.adapt-nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.adapt-nav.menu-open .adapt-nav__toggle span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}
.adapt-nav.menu-open .adapt-nav__toggle span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

@media (max-width: 767.98px) {
  .adapt-nav__toggle {
    display: flex;
  }
  .adapt-nav__menu {
    position: fixed;
    inset: 0;
    background: var(--paper);
    padding: 6.5rem var(--gutter) 2rem;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  }
  .adapt-nav__menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .adapt-nav__menu ol {
    flex-direction: column;
    gap: 0;
  }
  .adapt-nav__menu a {
    font-size: 1.6rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    text-transform: none;
    letter-spacing: 0;
    font-family: var(--font-display);
    font-weight: 600;
  }
  .adapt-nav__menu a .num {
    font-family: var(--font-sans);
  }
}

/* ============ Scroll reveal ============ */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal="stagger"] > * {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal="stagger"].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal="stagger"].is-visible > *:nth-child(1) { transition-delay: 0.02s; }
[data-reveal="stagger"].is-visible > *:nth-child(2) { transition-delay: 0.09s; }
[data-reveal="stagger"].is-visible > *:nth-child(3) { transition-delay: 0.16s; }
[data-reveal="stagger"].is-visible > *:nth-child(4) { transition-delay: 0.23s; }
[data-reveal="stagger"].is-visible > *:nth-child(5) { transition-delay: 0.30s; }

/* ============ Hero ============ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 0 4rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.hero__kicker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.hero__kicker .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  flex-shrink: 0;
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  font-weight: 600;
  max-width: 16ch;
}

.hero h1 em {
  font-style: italic;
  font-weight: 500;
  color: var(--accent);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  color: var(--muted);
  max-width: 46ch;
  margin: 1.75rem 0 2.25rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  padding: 0.42rem 0.95rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
  background: #fff;
}

.hero__authors {
  margin-top: 2.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 62ch;
}

.hero__scroll {
  position: absolute;
  bottom: 2.25rem;
  left: var(--gutter);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero__scroll .line {
  width: 32px;
  height: 1px;
  background: var(--border-strong);
  position: relative;
  overflow: hidden;
}
.hero__scroll .line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateX(-100%);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

@media (max-width: 767.98px) {
  .hero__scroll { display: none; }
}

/* ============ Sections ============ */
.section {
  padding: clamp(4.5rem, 9vw, 8rem) 0;
  border-bottom: 1px solid var(--border);
}

.section--tint {
  background: var(--paper-2);
  padding-top: clamp(2rem, 4vw, 3rem);
  padding-bottom: clamp(2rem, 4vw, 3rem);
  margin-top: clamp(2rem, 4vw, 4rem);
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  flex-wrap: wrap;
}

.section__eyebrow {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 0.9rem;
}

.section__eyebrow .num {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  font-weight: 600;
}

.section__eyebrow .label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.section__title {
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 600;
  max-width: 28ch;
}

.section__intro {
  max-width: 36ch;
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0;
}

.lead-text {
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

/* ============ Overview layout ============ */
.overview-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: start;
}

@media (max-width: 991.98px) {
  .overview-grid {
    grid-template-columns: 1fr;
  }
}

.goal-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.goal-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.9rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--border);
}

.goal-list li:last-child {
  border-bottom: 1px solid var(--border);
}

.goal-list .goal-num {
  font-family: var(--font-display);
  color: var(--accent);
  font-weight: 600;
}

.goal-list strong {
  display: block;
  margin-bottom: 0.2rem;
}

.goal-list span.body {
  color: var(--muted);
  font-size: 0.94rem;
}

.question-list {
  margin-top: 1rem;
}

.question-row {
  display: grid;
  grid-template-columns: clamp(3rem, 6vw, 4.5rem) 1fr;
  gap: clamp(1rem, 3vw, 2.25rem);
  padding: clamp(1.75rem, 3vw, 2.5rem) 0;
  border-top: 1px solid var(--border);
  align-items: baseline;
}

.question-row:last-child {
  border-bottom: 1px solid var(--border);
}

.question-row .q-num {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 500;
  color: var(--border-strong);
  transition: color 0.4s ease;
}

.question-row:hover .q-num {
  color: var(--accent);
}

.question-row h4 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 600;
  margin-bottom: 0.65rem;
}

.question-row p {
  color: var(--muted);
  font-size: 0.98rem;
  margin: 0;
  max-width: 62ch;
}

/* ============ Schedule ============ */
.schedule-list {
  border-top: 1px solid var(--border-strong);
}

.schedule-row {
  display: grid;
  grid-template-columns: 6px 1fr;
  column-gap: clamp(0.9rem, 2.5vw, 1.5rem);
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease;
}

.schedule-row:hover {
  background: rgba(77, 61, 247, 0.04);
}

/* Height encodes duration: taller bar = longer block, set inline per-row via durMin * PX_PER_MIN. */
.schedule-row__bar {
  width: 6px;
  border-radius: 3px;
  background: var(--accent);
}

.schedule-row__body {
  display: grid;
  grid-template-columns: clamp(6.5rem, 12vw, 9rem) 1fr;
  column-gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
}

.schedule-row__body .time {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
}

.schedule-row__body .activity {
  font-size: 0.98rem;
  color: var(--ink);
}

.schedule-session {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 2rem 0 0.75rem;
  margin-top: 0.5rem;
}

.schedule-session:first-child {
  margin-top: 0;
  padding-top: 0.75rem;
}

.schedule-session span {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--ink);
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  white-space: nowrap;
}

.schedule-session::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-strong);
}

@media (max-width: 575.98px) {
  .schedule-row__body {
    grid-template-columns: 1fr;
    row-gap: 0.35rem;
  }
}

/* ============ Keynote ============ */
.keynote-panel {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  border: 1px solid var(--border-strong);
  border-radius: 1.25rem;
  overflow: hidden;
  background: #fff;
}

@media (max-width: 767.98px) {
  .keynote-panel {
    grid-template-columns: 1fr;
  }
}

.keynote-visual {
  background: linear-gradient(155deg, var(--ink) 0%, #2a2470 65%, var(--accent) 130%);
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.keynote-visual::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  padding-bottom: 60%;
  border-radius: 50%;
  background: rgba(255, 90, 43, 0.35);
  filter: blur(10px);
  z-index: 0;
}

.keynote-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Face detected near the top-center of the source photo. */
  object-position: 49% 25%;
  z-index: 1;
}

.keynote-body {
  padding: clamp(2rem, 4vw, 3.25rem);
}

.keynote-body .role {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.keynote-body h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 0.15rem;
}

.keynote-body .affil {
  color: var(--muted);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.keynote-body .talk-title {
  font-weight: 600;
  font-size: 1.08rem;
  margin-bottom: 0.85rem;
}

.keynote-body p.lead-text {
  margin-bottom: 0;
}

/* ============ Organisers ============ */
.organiser-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 767.98px) {
  .organiser-grid {
    grid-template-columns: 1fr;
  }
}

.organiser-card {
  border: 1px solid var(--border);
  border-radius: 1.1rem;
  padding: clamp(1.5rem, 3vw, 2.1rem);
  background: #fff;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.35s ease, box-shadow 0.35s ease;
}

.organiser-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  box-shadow: 0 24px 48px -28px rgba(12, 12, 14, 0.28);
}

.organiser-top {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.organiser-avatar {
  width: 3.8rem;
  height: 3.8rem;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 2.5px solid;
  flex-shrink: 0;
  background: var(--paper-2);
}

.organiser-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.12rem;
  margin-bottom: 0.1rem;
}

.organiser-affil {
  color: var(--muted);
  font-size: 0.85rem;
}

.organiser-bio {
  font-size: 0.93rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 1.1rem;
}

.organiser-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.75rem;
}

.organiser-email {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 0.15rem;
  transition: color 0.25s ease, border-color 0.25s ease;
}

.organiser-email:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.organiser-link {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-ink);
  text-decoration: none;
  border: 1px solid var(--border-strong);
  border-radius: 100px;
  padding: 0.3rem 0.75rem;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.organiser-link:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ============ Contact ============ */
.contact-panel {
  background: var(--ink);
  color: #fff;
  border-radius: 1.5rem;
  padding: clamp(2.5rem, 6vw, 5rem);
  position: relative;
  overflow: hidden;
}

.contact-panel::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 55%;
  padding-bottom: 55%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 61, 247, 0.55), transparent 70%);
}

.contact-panel__inner {
  position: relative;
  z-index: 1;
}

.contact-panel p.lead-text {
  color: rgba(255, 255, 255, 0.68);
  max-width: 60ch;
}

.contact-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.contact-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.contact-list .role {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.6);
}

.contact-list strong {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.25rem;
}

.contact-list a {
  text-decoration: none;
  color: #fff;
  font-size: 0.98rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  padding-bottom: 0.15rem;
  transition: border-color 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}

.contact-list a:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

/* ============ Footer ============ */
.adapt-footer {
  background: var(--paper-2);
  border-top: 1px solid var(--border);
}

.adapt-footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 4.5rem) var(--gutter) 2.5rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 767.98px) {
  .adapt-footer__inner {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

.adapt-footer__brand img {
  height: 3.75rem;
  width: auto;
  display: block;
  margin-bottom: 0.75rem;
}

.adapt-footer__brand p {
  color: var(--muted);
  font-size: 0.92rem;
  margin: 0;
}

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

.adapt-footer__links a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.92rem;
  width: fit-content;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}

.adapt-footer__links a:hover {
  border-color: var(--ink);
}

.adapt-footer__meta {
  font-size: 0.88rem;
  color: var(--muted);
}

.adapt-footer__meta p {
  margin: 0 0 0.3rem;
}

.adapt-footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.adapt-footer__bottom a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}