:root {
  --blue: #0056a8;
  --blue-logo: #1d71b8;
  --red: #e5293c;
  --teal: #43878e;
  --ink: #003b4c;
  --ink-soft: #1a1a1a;
  --pink: #d852b0;
  --pink-light: #f670ce;
  --pink-dark: #b70e93;
  --peach: #ef9e75;
  --gray-circle: #b3b3b3;
  --yellow: #ffe600;
  --white: #ffffff;
  --max: 1250px;
  --font: "Open Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink-soft);
  background: var(--white);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 8px 24px rgba(0, 59, 76, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem 0;
}

.logo img {
  width: clamp(160px, 22vw, 260px);
  height: auto;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: #111;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav ul {
  display: flex;
  gap: 1.75rem;
  align-items: center;
}

.site-nav a {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: #a64d92;
}

/* Hero */
.hero {
  position: relative;
  min-height: clamp(280px, 42vw, 420px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #111 center / cover no-repeat;
  color: #111;
}

.hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(42vw, 420px);
  aspect-ratio: 1;
  background: var(--white);
  border-radius: 50% 0 0 0;
  transform: translate(18%, 42%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
  padding: 3rem 0 4rem;
  display: flex;
  justify-content: flex-end;
}

.hero h1 {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(2.4rem, 6.5vw, 4.4rem);
  font-weight: 800;
  font-style: oblique;
  letter-spacing: -0.07em;
  line-height: 0.95;
  text-align: right;
  animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Intro */
.intro {
  padding: 2.5rem 0 1rem;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 2rem 3rem;
  align-items: center;
}

.intro h2 {
  margin: 0 0 1rem;
  color: var(--red);
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.15;
}

.intro .lead {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.intro .lead + .lead {
  margin-top: 1rem;
  font-weight: 400;
  color: var(--ink-soft);
}

.circle-photo {
  width: min(100%, 360px);
  aspect-ratio: 1;
  margin-inline: auto;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(0, 59, 76, 0.12);
}

.circle-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.4rem;
  padding: 0.9rem 1.4rem;
  border-radius: 10px;
  background: linear-gradient(to bottom, var(--pink-light) 0%, var(--pink) 100%);
  color: var(--white);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  text-align: center;
  transition: transform 0.2s ease, filter 0.2s ease, background 0.2s ease;
}

.btn:hover {
  background: linear-gradient(to bottom, #d52cb1 0%, var(--pink-dark) 100%);
  transform: translateY(-1px);
  filter: brightness(1.02);
}

.btn-center {
  display: flex;
  width: fit-content;
  margin-inline: auto;
}

.org-note {
  margin-top: 1.5rem;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

/* Question block */
.question {
  padding: 2rem 0 1rem;
}

.question-title {
  position: relative;
  display: inline-block;
  margin: 1.5rem 0 1.25rem;
  color: var(--blue);
  font-size: clamp(2.2rem, 5vw, 3.9rem);
  font-weight: 800;
  letter-spacing: -0.1em;
  line-height: 1;
}

.question-title::before {
  content: "";
  position: absolute;
  left: -0.15em;
  top: 50%;
  width: 0.95em;
  height: 0.95em;
  border-radius: 50%;
  background: var(--gray-circle);
  opacity: 0.55;
  transform: translateY(-50%);
  z-index: -1;
}

.question-body {
  font-weight: 600;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  max-width: 70ch;
}

/* Speakers */
.speakers {
  padding: 2rem 0 1rem;
}

.speakers-row {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.75rem;
  align-items: center;
}

.speakers-row .circle-photo {
  width: 100%;
  box-shadow: none;
}

.program-cta {
  padding: 1.5rem 0 0.5rem;
  text-align: center;
}

/* Audience */
.audience {
  padding: 2rem 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 2rem 3rem;
  align-items: center;
}

.venue-card {
  position: relative;
  width: min(100%, 320px);
  margin-inline: auto;
}

.venue-card .circle-photo {
  width: 100%;
}

.venue-labels {
  position: absolute;
  inset: 18% 8% auto;
  display: grid;
  gap: 0.45rem;
  justify-items: start;
  pointer-events: none;
}

.venue-labels span {
  display: inline-block;
  padding: 0.35rem 0.55rem;
  background: var(--yellow);
  color: #111;
  font-weight: 800;
  font-size: clamp(0.85rem, 1.5vw, 1.05rem);
  letter-spacing: -0.02em;
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.08);
}

.audience h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.audience li {
  position: relative;
  padding-left: 1.1rem;
  margin: 0.55rem 0;
  font-size: 1.05rem;
}

.audience li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--pink);
  font-weight: 700;
}

/* Future */
.future {
  padding: 2.5rem 0 1rem;
}

.future-title {
  position: relative;
  display: inline-block;
  margin: 0 0 1.75rem;
  color: var(--teal);
  font-size: clamp(2rem, 4.5vw, 3.9rem);
  font-weight: 800;
  letter-spacing: -0.08em;
  line-height: 1.05;
}

.future-title .mark {
  position: relative;
  display: inline-block;
  padding: 0 0.12em;
}

.future-title .mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1.05em;
  height: 1.05em;
  border-radius: 50%;
  background: var(--peach);
  transform: translate(-50%, -50%);
  z-index: -1;
}

.future-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem 3rem;
  align-items: center;
}

.future h3 {
  margin: 0 0 0.85rem;
  font-size: 1.15rem;
  font-weight: 800;
}

.future p {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

/* Partners / video */
.partners {
  padding: 2rem 0 3.5rem;
}

.partners-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem 2.5rem;
  align-items: start;
}

.partners p {
  font-size: 1.1rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.partners a.mail {
  color: #a64d92;
  font-weight: 700;
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.logo-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1.25rem 1.5rem;
  align-items: center;
  margin-top: 2.75rem;
}

.logo-row a,
.logo-row span {
  display: grid;
  place-items: center;
  min-height: 72px;
}

.logo-row img {
  max-height: 64px;
  width: auto;
  object-fit: contain;
  filter: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.logo-row a:hover img {
  transform: translateY(-2px);
}

/* Footer */
.site-footer {
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  color: #666;
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.footer-inner a:hover {
  color: var(--pink);
}

/* Inner pages */
.page-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero h1 {
  margin: 0;
  color: var(--red);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.05em;
}

.page-content {
  padding: 0 0 3.5rem;
  max-width: 72ch;
}

.page-content h2 {
  margin: 2rem 0 0.75rem;
  color: var(--blue);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.page-content p,
.page-content li {
  font-size: 1.05rem;
}

.page-content ul {
  list-style: disc;
  padding-left: 1.2rem;
}

.page-content li {
  margin: 0.4rem 0;
}

.contact-card {
  margin-top: 1.5rem;
  padding: 1.25rem 1.4rem;
  border-left: 4px solid var(--pink);
  background: #faf7fb;
}

/* Reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.reveal-delay-1 {
  transition-delay: 0.08s;
}

.reveal-delay-2 {
  transition-delay: 0.16s;
}

.reveal-delay-3 {
  transition-delay: 0.24s;
}

@media (max-width: 960px) {
  .intro-grid,
  .audience-grid,
  .future-grid,
  .partners-grid {
    grid-template-columns: 1fr;
  }

  .speakers-row {
    grid-template-columns: repeat(4, 1fr);
  }

  .logo-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero::after {
    width: min(55vw, 280px);
  }

  .circle-photo {
    width: min(100%, 280px);
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0.5rem 1rem 1rem;
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }

  .hero {
    min-height: 240px;
  }

  .hero-inner {
    justify-content: center;
    padding: 2.5rem 0 3.5rem;
  }

  .hero h1 {
    text-align: center;
  }

  .speakers-row {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
  }

  .logo-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .btn {
    width: 100%;
  }
}