* {
  box-sizing: border-box;
}

:root {
  --color-bg: #070b1a;
  --color-surface: #0f162b;
  --color-card: rgba(15, 22, 43, 0.75);
  --color-text: #f5f7ff;
  --color-muted: #b6bdd3;
  --color-primary: #ff9900;
  --color-secondary: #3b82f6;
  --color-accent: #ffb84d;
  --max-width: 1200px;
  --radius-large: 28px;
  --radius-medium: 18px;
  --radius-small: 12px;
  --gap-section: clamp(72px, 6vw, 96px);
  font-family: "Inter", "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
  margin: 0;
  background: linear-gradient(160deg, #03050d 0%, #101a35 40%, #030712 100%);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  letter-spacing: 0.02em;
  padding-top: 80px;
}

.fixed-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(7, 11, 26, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem 0;
}

.fixed-header__inner {
  width: min(90%, var(--max-width));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.fixed-header__logo {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.logo-main {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-text);
  line-height: 1.2;
}

.logo-sub {
  font-size: 0.75rem;
  color: var(--color-muted);
  line-height: 1;
}

.fixed-header__nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.fixed-header__nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.fixed-header__nav a:hover {
  color: var(--color-text);
}

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

section {
  padding: var(--gap-section) 0;
}

.section__inner {
  width: min(90%, var(--max-width));
  margin: 0 auto;
}

h1, h2, h3 {
  margin-top: 0;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.8rem, 4vw, 4rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
}

h3 {
  font-size: clamp(1.4rem, 2.2vw, 1.8rem);
}

p {
  color: var(--color-muted);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

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

ul li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-text);
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.button:focus-visible {
  outline: 3px solid rgba(59, 130, 246, 0.6);
  outline-offset: 3px;
}

.button--primary {
  background: linear-gradient(135deg, var(--color-primary), #ff6b00);
  box-shadow: 0 12px 24px rgba(255, 153, 0, 0.25);
}

.button--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(255, 153, 0, 0.35);
}

.button--ghost {
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.button--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
}

.button--light {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

.button--light:hover {
  background: rgba(255, 255, 255, 0.2);
}

.button--block {
  width: 100%;
}

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: left;
  padding: calc(var(--gap-section) + 60px) 0 var(--gap-section);
  overflow: hidden;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 80% at 20% 20%, rgba(255, 153, 0, 0.25), transparent),
    radial-gradient(50% 60% at 80% 30%, rgba(59, 130, 246, 0.3), transparent),
    radial-gradient(40% 50% at 50% 80%, rgba(255, 255, 255, 0.08), transparent);
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  width: min(88%, var(--max-width));
  margin: 0 auto;
  padding: clamp(36px, 5vw, 64px);
  border-radius: var(--radius-large);
  background: rgba(7, 11, 26, 0.7);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-muted);
}

.hero__title {
  margin: 1.2rem 0;
}

.hero__title-by,
.hero__title-tagline {
  display: block;
}

.hero__title-by {
  margin-top: 0.35rem;
  font-size: clamp(0.85rem, 1.3vw, 1.1rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.hero__title-tagline {
  margin-top: 0.75rem;
  font-size: clamp(1.2rem, 1.8vw, 1.65rem);
  color: var(--color-accent);
}

.hero__description {
  max-width: 680px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0 2.5rem;
}

.hero__meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.hero__meta dt {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

.hero__meta dd {
  margin: 0;
  font-size: 1.05rem;
  color: var(--color-text);
}

.intro p {
  max-width: 760px;
}

.pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.pill-grid span {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.25);
  font-size: 0.95rem;
  color: var(--color-text);
}

.audience {
  background: rgba(15, 22, 43, 0.55);
}

.audience__grid {
  display: grid;
  gap: 1.8rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.audience__card {
  padding: 2.2rem;
  border-radius: var(--radius-medium);
  background: rgba(7, 11, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.25);
}

.highlights .timeline {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 3rem;
}

.timeline article {
  padding: 2rem;
  background: rgba(7, 11, 26, 0.6);
  border-radius: var(--radius-medium);
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.05);
  min-height: 240px;
}

.timeline h3 {
  margin-bottom: 0.75rem;
}

.badge {
  display: inline-flex;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  position: absolute;
  bottom: 1.5rem;
}

.badge--accent {
  background: rgba(255, 153, 0, 0.18);
  color: var(--color-primary);
}

.schedule {
  background: rgba(8, 12, 24, 0.85);
}

.schedule__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.schedule__col {
  padding: 2rem;
  border-radius: var(--radius-medium);
  background: rgba(15, 22, 43, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.schedule__col ul li {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-left: 0;
}

.schedule__col ul li::before {
  display: none;
}

.schedule__col span {
  min-width: 75px;
  font-family: "Inter", sans-serif;
  font-weight: 600;
  color: var(--color-accent);
}

.organizers {
  background: linear-gradient(135deg, rgba(7, 11, 26, 0.95), rgba(13, 20, 40, 0.85));
}

.organizers__inner {
  display: grid;
  gap: 3rem;
}

.organizers__header {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.organizers__grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.organizer-card {
  position: relative;
  border-radius: var(--radius-medium);
  background: rgba(15, 22, 43, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.organizer-card__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2.4rem 2rem;
  text-decoration: none;
  color: inherit;
}

.organizer-card__avatar {
  width: 140px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.organizer-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.organizer-card__info {
  display: grid;
  gap: 0.5rem;
  text-align: center;
}

.organizer-card__info h3 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--color-text);
}

.organizer-card__info p {
  margin: 0;
  font-size: 0.95rem;
}

.organizer-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.18);
}

.callout__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.callout__text {
  max-width: 620px;
}

.callout,
.speaker {
  background: linear-gradient(135deg, rgba(255, 153, 0, 0.12), rgba(59, 130, 246, 0.2));
}

.speaker__inner {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.speaker__card {
  padding: 2rem;
  border-radius: var(--radius-medium);
  background: rgba(15, 22, 43, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.venue__inner {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
}

.venue__info p {
  font-size: 1.1rem;
  color: var(--color-text);
}

.map-placeholder {
  aspect-ratio: 4 / 3;
  width: 100%;
  border-radius: var(--radius-medium);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
}

.map-placeholder iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.register {
  background: rgba(8, 12, 24, 0.85);
}

.register__inner {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
}

.register__cta {
  padding: 2.2rem;
  border-radius: var(--radius-medium);
  background: rgba(7, 11, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.register__form {
  display: grid;
  gap: 0.85rem;
  padding: 2.2rem;
  border-radius: var(--radius-medium);
  background: rgba(7, 11, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
}

.register__form label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
}

.register__form input,
.register__form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(6, 9, 20, 0.8);
  color: var(--color-text);
  font-size: 1rem;
}

.register__form input::placeholder,
.register__form textarea::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.register__form input:focus,
.register__form textarea:focus {
  outline: 2px solid rgba(59, 130, 246, 0.35);
  border-color: transparent;
}

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

.speakers {
  background: rgba(8, 12, 24, 0.85);
}

.speakers__inner {
  display: grid;
  gap: 3rem;
}

.speakers__header {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.speakers__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.speaker-card {
  border-radius: var(--radius-medium);
  background: rgba(15, 22, 43, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.3);
}

.speaker-card__content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.speaker-card__avatar {
  width: 120px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.speaker-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-card__info {
  display: grid;
  gap: 0.5rem;
  text-align: center;
}

.speaker-card__info h3 {
  margin: 0;
  font-size: 1.3rem;
  color: var(--color-text);
}

.speaker-card__info h4 {
  margin: 0;
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
}

.speaker-card__company {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-muted);
  font-weight: 600;
}

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

.speaker-card__bio {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.session-details {
  margin-top: 3rem;
}

.session-details h3 {
  text-align: center;
  margin-bottom: 2rem;
}

.session-table {
  background: rgba(15, 22, 43, 0.65);
  border-radius: var(--radius-medium);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.session-row {
  display: grid;
  grid-template-columns: 140px 1fr 280px;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.session-row:last-child {
  border-bottom: none;
}

.session-header {
  background: rgba(255, 153, 0, 0.1);
  font-weight: 600;
  color: var(--color-accent);
}

.session-break {
  background: rgba(255, 255, 255, 0.02);
  color: var(--color-muted);
}

.session-category {
  background: rgba(59, 130, 246, 0.15);
  font-weight: 600;
  color: var(--color-secondary);
  border-top: 2px solid rgba(59, 130, 246, 0.3);
}

.session-time {
  font-family: "Inter", sans-serif;
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.9rem;
}

.session-title {
  color: var(--color-text);
}

.session-speaker {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.x-icon {
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.organizer-card:hover .x-icon {
  color: var(--color-text);
}

.linkedin-icon {
  color: var(--color-muted);
  transition: color 0.2s ease;
}

.speaker-card:hover .x-icon,
.speaker-card:hover .linkedin-icon {
  color: var(--color-text);
}

.speaker-card .social-link a {
  color: inherit;
  text-decoration: none;
}

.organizer-role {
  margin: 0.25rem 0 0 0;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
}

.footer {
  padding: 48px 0 32px;
  background: #04060f;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer__inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, max-content));
  justify-content: center;
  align-items: start;
  text-align: center;
}

.footer__logo {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.footer__links a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__copy {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.35);
  text-align: center;
}

@media (max-width: 768px) {
  body {
    padding-top: 70px;
  }

  .fixed-header {
    padding: 0.75rem 0;
  }

  .fixed-header__nav {
    gap: 1rem;
  }

  .fixed-header__nav a {
    font-size: 0.85rem;
  }

  .logo-main {
    font-size: 1rem;
  }

  .logo-sub {
    font-size: 0.7rem;
  }

  .hero__content {
    padding: 32px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .organizers__grid {
    gap: 1.8rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .organizer-card__link {
    padding: 2rem 1.6rem;
  }

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

  .speaker-card__content {
    padding: 1.5rem;
  }

  .session-row {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1rem;
  }

  .session-time {
    font-size: 0.85rem;
  }

  .session-title {
    font-size: 0.95rem;
  }

  .session-speaker {
    font-size: 0.8rem;
  }

  .timeline article {
    min-height: auto;
  }

  .schedule__col {
    padding: 1.6rem;
  }

  .register__form {
    padding: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}