:root {
  /* Core palette and layout tokens for the full one-page site. */
  --bg: #f6f4f1;
  --bg-top: #fcfbf9;
  --bg-elevated: rgba(255, 255, 255, 0.78);
  --surface: #fffdfb;
  --surface-strong: #fff8f4;
  --surface-soft: #eef2f4;
  --text: #18242d;
  --text-soft: #56646d;
  --heading: #10202a;
  --border: rgba(102, 116, 125, 0.18);
  --shadow: 0 22px 60px rgba(23, 38, 47, 0.09);
  --shadow-soft: 0 16px 36px rgba(23, 38, 47, 0.07);
  --accent: #8f2332;
  --accent-deep: #6f1423;
  --accent-soft: #ead4d8;
  --accent-glow: rgba(143, 35, 50, 0.14);
  --blue-gray: #62707b;
  --blue-gray-soft: #dfe7eb;
  --header-bg: rgba(246, 244, 241, 0.78);
  --nav-hover-bg: rgba(255, 255, 255, 0.72);
  --panel-bg: rgba(255, 255, 255, 0.7);
  --menu-panel-bg: rgba(255, 255, 255, 0.96);
  --card-bg: rgba(255, 255, 255, 0.78);
  --button-secondary-bg: rgba(255, 255, 255, 0.74);
  --signal-panel-bg: rgba(255, 255, 255, 0.74);
  --analysis-bg: rgba(16, 32, 42, 0.9);
  --footer-bg: rgba(250, 248, 245, 0.82);
  --backtotop-bg: rgba(255, 255, 255, 0.85);
  --speaker-initial-bg: rgba(255, 255, 255, 0.88);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1160px;
  --nav-height: 86px;
  --transition: 220ms ease;
}

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f161b;
  --bg-top: #121b21;
  --bg-elevated: rgba(18, 27, 33, 0.78);
  --surface: #121c22;
  --surface-strong: #172228;
  --surface-soft: #16212a;
  --text: #e8edf0;
  --text-soft: #a6b3bb;
  --heading: #f3f6f8;
  --border: rgba(180, 193, 201, 0.18);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
  --shadow-soft: 0 16px 36px rgba(0, 0, 0, 0.22);
  --accent: #c85a69;
  --accent-deep: #ab3d4d;
  --accent-soft: rgba(200, 90, 105, 0.18);
  --accent-glow: rgba(200, 90, 105, 0.18);
  --blue-gray: #8ea0aa;
  --blue-gray-soft: #25323a;
  --header-bg: rgba(11, 18, 23, 0.8);
  --nav-hover-bg: rgba(255, 255, 255, 0.06);
  --panel-bg: rgba(18, 27, 33, 0.84);
  --menu-panel-bg: rgba(14, 21, 26, 0.96);
  --card-bg: rgba(18, 27, 33, 0.78);
  --button-secondary-bg: rgba(255, 255, 255, 0.04);
  --signal-panel-bg: rgba(15, 22, 27, 0.82);
  --analysis-bg: rgba(5, 10, 13, 0.84);
  --footer-bg: rgba(10, 16, 20, 0.88);
  --backtotop-bg: rgba(17, 26, 32, 0.88);
  --speaker-initial-bg: rgba(17, 26, 32, 0.88);
}

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

body {
  margin: 0;
  font-family: "Instrument Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(143, 35, 50, 0.06), transparent 24%),
    radial-gradient(circle at top right, rgba(98, 112, 123, 0.09), transparent 26%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
  line-height: 1.65;
}

html[data-theme="dark"] body {
  background:
    radial-gradient(circle at top left, rgba(200, 90, 105, 0.12), transparent 24%),
    radial-gradient(circle at top right, rgba(120, 142, 156, 0.12), transparent 28%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
}

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

a {
  color: inherit;
}

button,
a {
  transition:
    transform var(--transition),
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    opacity var(--transition);
}

:focus-visible {
  outline: 3px solid rgba(143, 35, 50, 0.26);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.section {
  padding: 6rem 0;
  scroll-margin-top: calc(var(--nav-height) + 1rem);
}

.section-tinted {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.46), rgba(255, 255, 255, 0)),
    linear-gradient(135deg, rgba(143, 35, 50, 0.03), rgba(98, 112, 123, 0.06));
}

.section-soft {
  background:
    linear-gradient(180deg, rgba(239, 244, 247, 0.7), rgba(255, 255, 255, 0.3));
}

html[data-theme="dark"] .section-tinted {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    linear-gradient(135deg, rgba(200, 90, 105, 0.08), rgba(120, 142, 156, 0.08));
}

html[data-theme="dark"] .section-soft {
  background:
    linear-gradient(180deg, rgba(22, 33, 42, 0.82), rgba(14, 21, 26, 0.32));
}

.section-accent {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 1.8rem;
  height: 1px;
  background: currentColor;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-heading h2,
.hero-copy h1,
.footer-title {
  margin: 0;
  font-family: "Newsreader", serif;
  color: var(--heading);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 1rem;
}

.section-heading p,
.hero-intro,
.hero-subtitle,
.timeline-body p,
.speaker-body p,
.highlight-card p,
.callout-copy p,
.organizer-card p,
.contact-card p,
.footer-grid p {
  margin: 0 0 1rem;
  color: var(--text-soft);
}

.section-note {
  color: var(--blue-gray);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: var(--header-bg);
  border-bottom: 1px solid rgba(102, 116, 125, 0.12);
}

.navbar {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 18px;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.48), transparent 32%),
    linear-gradient(145deg, #b63a4d, var(--accent-deep));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--heading);
}

.brand-subtitle {
  font-size: 0.82rem;
  color: var(--text-soft);
}

.nav-panel {
  display: flex;
  align-items: center;
}

.nav-right {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.7rem;
  padding: 0 0.95rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--heading);
  background: var(--nav-hover-bg);
  box-shadow: inset 0 0 0 1px rgba(102, 116, 125, 0.08);
}

.theme-toggle,
.menu-toggle {
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid rgba(102, 116, 125, 0.18);
  border-radius: 18px;
  background: var(--panel-bg);
  color: var(--heading);
  cursor: pointer;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  width: auto;
  padding: 0 1rem;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
}

.theme-toggle-text {
  white-space: nowrap;
}

.theme-toggle:hover,
.menu-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(23, 38, 47, 0.09);
}

.theme-toggle-icon {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  background: linear-gradient(90deg, currentColor 0 50%, transparent 50% 100%);
  opacity: 0.9;
}

.menu-toggle {
  display: none;
}

.menu-toggle span {
  display: block;
  width: 1.2rem;
  height: 2px;
  margin: 0.24rem auto;
  border-radius: 999px;
  background: var(--heading);
}

.hero {
  padding-top: 4.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(300px, 0.68fr);
  gap: 2rem;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(2.65rem, 5.5vw, 4.7rem);
  max-width: 18ch;
  line-height: 1.02;
  margin-bottom: 1.35rem;
}

.hero-subtitle {
  max-width: 52rem;
  font-size: 1.16rem;
  line-height: 1.4;
  color: var(--heading);
}

.hero-intro {
  max-width: 50rem;
  font-size: 1.03rem;
}

.hero-context {
  max-width: 50rem;
  margin: 0 0 1.1rem;
  color: var(--blue-gray);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 1.6rem 0 2rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 2.3rem;
  padding: 0 0.9rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid rgba(102, 116, 125, 0.12);
  color: var(--heading);
  font-size: 0.9rem;
}

.pill-soft {
  background: rgba(234, 212, 216, 0.55);
  color: var(--accent-deep);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, #a73145, var(--accent-deep));
  color: #fff;
  box-shadow: 0 18px 32px rgba(111, 20, 35, 0.18);
}

.button-primary:hover {
  box-shadow: 0 20px 36px rgba(111, 20, 35, 0.24);
}

.button-secondary {
  color: var(--heading);
  background: var(--button-secondary-bg);
  border-color: rgba(102, 116, 125, 0.18);
}

.hero-visual {
  position: relative;
}

.visual-card {
  position: relative;
  min-height: 38rem;
  border-radius: 38px;
  overflow: hidden;
  border: 1px solid rgba(102, 116, 125, 0.14);
  background:
    radial-gradient(circle at 20% 25%, rgba(143, 35, 50, 0.08), transparent 24%),
    radial-gradient(circle at 75% 30%, rgba(98, 112, 123, 0.12), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(245, 242, 239, 0.92));
  box-shadow: var(--shadow);
}

html[data-theme="dark"] .visual-card {
  background:
    radial-gradient(circle at 20% 25%, rgba(200, 90, 105, 0.14), transparent 24%),
    radial-gradient(circle at 75% 30%, rgba(142, 160, 170, 0.14), transparent 28%),
    linear-gradient(180deg, rgba(18, 27, 33, 0.96), rgba(12, 18, 22, 0.92));
}

.visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(102, 116, 125, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 116, 125, 0.07) 1px, transparent 1px);
  background-size: 2.9rem 2.9rem;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 95%);
}

html[data-theme="dark"] .visual-grid {
  background-image:
    linear-gradient(rgba(180, 193, 201, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 193, 201, 0.08) 1px, transparent 1px);
}

.cell-cluster {
  position: absolute;
  display: grid;
  place-items: center;
}

.cell-cluster-a {
  top: 3.6rem;
  left: 2.8rem;
  width: 12.5rem;
  height: 12.5rem;
}

.cell-cluster-b {
  right: 2.1rem;
  bottom: 5.2rem;
  width: 13rem;
  height: 13rem;
}

.cell {
  position: absolute;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.88) 0 18%, transparent 19% 34%, rgba(143, 35, 50, 0.8) 35% 58%, rgba(104, 18, 30, 0.92) 59% 100%);
  box-shadow:
    inset 0 6px 14px rgba(255, 255, 255, 0.3),
    0 18px 28px rgba(111, 20, 35, 0.16);
}

.cell.large {
  width: 8.6rem;
  height: 8.6rem;
}

.cell.medium {
  width: 5.8rem;
  height: 5.8rem;
}

.cell.small {
  width: 4.1rem;
  height: 4.1rem;
}

.cell-cluster-a .cell.large {
  left: 1rem;
  top: 1rem;
}

.cell-cluster-a .cell.medium {
  right: 0.3rem;
  top: 3.1rem;
}

.cell-cluster-a .cell.small {
  bottom: 0.8rem;
  left: 1.2rem;
}

.cell-cluster-b .cell.large {
  right: 1.2rem;
  bottom: 1.1rem;
}

.cell-cluster-b .cell.medium {
  left: 0.4rem;
  top: 0.8rem;
}

.cell-cluster-b .cell.small {
  left: 2.7rem;
  bottom: 4.7rem;
}

.signal-panel {
  position: absolute;
  top: 9.5rem;
  right: 2.5rem;
  width: 10rem;
  padding: 1rem;
  border-radius: 22px;
  background: var(--signal-panel-bg);
  border: 1px solid rgba(102, 116, 125, 0.14);
  box-shadow: var(--shadow-soft);
}

.signal-line,
.signal-dot {
  display: block;
}

.signal-line {
  height: 0.55rem;
  margin-bottom: 0.6rem;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(98, 112, 123, 0.16), rgba(143, 35, 50, 0.38));
}

.signal-line.short {
  width: 65%;
}

.signal-dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0.5rem var(--accent-glow);
}

.analysis-badge {
  position: absolute;
  left: 2.2rem;
  bottom: 2.2rem;
  max-width: 16rem;
  padding: 1.15rem 1.2rem;
  border-radius: 22px;
  background: var(--analysis-bg);
  color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 24px 32px rgba(16, 32, 42, 0.18);
}

.analysis-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.hero-orbit {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-orbit path {
  fill: none;
  stroke: rgba(98, 112, 123, 0.35);
  stroke-width: 2;
  stroke-dasharray: 8 8;
}

.hero-orbit circle {
  fill: rgba(98, 112, 123, 0.9);
}

html[data-theme="dark"] .hero-orbit path {
  stroke: rgba(142, 160, 170, 0.36);
}

html[data-theme="dark"] .hero-orbit circle {
  fill: rgba(142, 160, 170, 0.95);
}

.topic-grid,
.highlight-grid,
.speaker-grid,
.organizer-grid {
  display: grid;
  gap: 1.25rem;
}

.topic-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.topic-card,
.highlight-card,
.speaker-card,
.organizer-card,
.contact-card,
.timeline-item,
.callout {
  border: 1px solid rgba(102, 116, 125, 0.12);
  background: var(--card-bg);
  box-shadow: var(--shadow-soft);
}

.topic-card:hover,
.highlight-card:hover,
.speaker-card:hover,
.organizer-card:hover,
.contact-card:hover,
.timeline-item:hover,
.callout:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 44px rgba(23, 38, 47, 0.1);
}

.topic-card {
  position: relative;
  padding: 1.45rem;
  border-radius: 24px;
  overflow: hidden;
}

.topic-card::after {
  content: "";
  position: absolute;
  inset: auto -8% -28% auto;
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(143, 35, 50, 0.12), transparent 70%);
}

.topic-card h3,
.highlight-card h3,
.timeline-body h3,
.speaker-body h3,
.organizer-card h3,
.contact-card h3 {
  margin: 0 0 0.8rem;
  color: var(--heading);
  font-size: 1.15rem;
}

.topic-list {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.topic-list li {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  color: var(--text-soft);
}

.topic-list li::before {
  content: "";
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  margin-top: 0.5rem;
  flex: none;
  background: linear-gradient(135deg, #c84a60, var(--accent));
  box-shadow: 0 0 0 0.28rem rgba(143, 35, 50, 0.08);
}

.highlight-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.highlight-card {
  padding: 1.55rem;
  border-radius: 24px;
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
  padding: 1.3rem 1.4rem;
  border-radius: 22px;
}

.timeline-time {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0 1rem;
  border-radius: 999px;
  background: rgba(234, 212, 216, 0.6);
  color: var(--accent-deep);
  font-weight: 700;
}

.speaker-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.speaker-tbd {
  display: grid;
  place-items: center;
  gap: 1rem;
  min-height: 18rem;
  padding: 2rem;
  border-radius: 28px;
  border: 1px solid rgba(102, 116, 125, 0.12);
  background: var(--card-bg);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

.speaker-tbd-badge {
  display: grid;
  place-items: center;
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #c84a60, var(--accent-deep));
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  box-shadow: 0 18px 30px rgba(111, 20, 35, 0.2);
}

.speaker-tbd p {
  max-width: 34rem;
  margin: 0;
  color: var(--text-soft);
}

.speaker-card {
  border-radius: 28px;
  overflow: hidden;
}

.speaker-media {
  position: relative;
  aspect-ratio: 5 / 4;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(16, 32, 42, 0.28)),
    linear-gradient(135deg, rgba(143, 35, 50, 0.18), rgba(98, 112, 123, 0.14));
}

.speaker-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.72;
  mix-blend-mode: multiply;
}

html[data-theme="dark"] .speaker-media img {
  opacity: 0.62;
  mix-blend-mode: normal;
}

.speaker-initials {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  place-items: center;
  width: 3.1rem;
  height: 3.1rem;
  border-radius: 50%;
  background: var(--speaker-initial-bg);
  color: var(--accent-deep);
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 12px 24px rgba(16, 32, 42, 0.14);
}

.speaker-body {
  padding: 1.4rem;
}

.speaker-affiliation {
  color: var(--accent-deep);
  font-weight: 600;
}

.callout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 1.5rem;
  align-items: center;
  padding: 2rem;
  border-radius: 32px;
  background:
    radial-gradient(circle at right top, rgba(143, 35, 50, 0.12), transparent 30%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(255, 248, 244, 0.96));
}

html[data-theme="dark"] .callout {
  background:
    radial-gradient(circle at right top, rgba(200, 90, 105, 0.16), transparent 30%),
    linear-gradient(135deg, rgba(18, 27, 33, 0.94), rgba(20, 31, 37, 0.96));
}

.callout-copy h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  font-family: "Newsreader", serif;
  color: var(--heading);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.organizer-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.organizer-card {
  overflow: hidden;
  padding: 0;
  border-radius: 24px;
}

.organizer-media {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(16, 32, 42, 0.28)),
    linear-gradient(135deg, rgba(143, 35, 50, 0.16), rgba(98, 112, 123, 0.12));
}

.organizer-media::before,
.organizer-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.organizer-media::before {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(16, 32, 42, 0.28)),
    linear-gradient(135deg, rgba(143, 35, 50, 0.12), rgba(98, 112, 123, 0.08));
}

.organizer-media::after {
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.16), transparent 34%),
    linear-gradient(180deg, transparent 48%, rgba(16, 32, 42, 0.18) 100%);
}

.organizer-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  opacity: 0.72;
  mix-blend-mode: multiply;
}

html[data-theme="dark"] .organizer-media::before {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(5, 10, 13, 0.34)),
    linear-gradient(135deg, rgba(200, 90, 105, 0.14), rgba(120, 142, 156, 0.08));
}

html[data-theme="dark"] .organizer-media::after {
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.07), transparent 34%),
    linear-gradient(180deg, transparent 44%, rgba(5, 10, 13, 0.24) 100%);
}

html[data-theme="dark"] .organizer-media img {
  opacity: 0.66;
  mix-blend-mode: normal;
}

.organizer-initials {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: var(--speaker-initial-bg);
  color: var(--accent-deep);
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 12px 24px rgba(16, 32, 42, 0.14);
  z-index: 2;
}

.organizer-body {
  padding: 1.3rem 1.4rem 1.45rem;
}

.organizer-role,
.contact-label {
  margin: 0 0 0.6rem;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.75fr);
  gap: 1.5rem;
  align-items: start;
}

.contact-heading {
  margin-bottom: 0;
}

.contact-card {
  padding: 1.6rem;
  border-radius: 28px;
}

.contact-extra {
  margin: 0 0 0.5rem;
  color: var(--heading);
}

.contact-card a,
.footer-grid a {
  color: var(--accent-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.contact-details {
  margin-top: 1.1rem;
  border-top: 1px solid rgba(102, 116, 125, 0.12);
  padding-top: 1rem;
}

.contact-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--heading);
}

.contact-list {
  margin: 1rem 0 0;
  padding-left: 1.15rem;
  color: var(--text-soft);
}

.contact-list li + li {
  margin-top: 0.45rem;
}

.site-footer {
  padding: 2.4rem 0 3rem;
  border-top: 1px solid rgba(102, 116, 125, 0.12);
  background: var(--footer-bg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 1.5rem;
  align-items: start;
}

.footer-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 0.85rem;
  max-width: 18ch;
}

.footer-links {
  display: grid;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-soft);
}

.footer-links a:hover {
  color: var(--heading);
}

.footer-note {
  max-width: 24ch;
}

.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid rgba(102, 116, 125, 0.16);
  border-radius: 50%;
  background: var(--backtotop-bg);
  color: var(--heading);
  box-shadow: 0 18px 30px rgba(23, 38, 47, 0.12);
  cursor: pointer;
  opacity: 0;
  transform: translateY(0.8rem);
  pointer-events: none;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Elements tagged with .reveal animate in as they enter the viewport. */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .hero-grid,
  .contact-grid,
  .footer-grid,
  .callout,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .topic-grid,
  .highlight-grid,
  .speaker-grid,
  .organizer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-time {
    justify-self: start;
  }

  .callout-actions {
    justify-self: start;
  }
}

@media (max-width: 860px) {
  :root {
    --nav-height: 78px;
  }

  .menu-toggle {
    display: inline-block;
  }

  .nav-panel {
    position: absolute;
    top: calc(100% + 0.7rem);
    left: 1rem;
    right: 1rem;
    display: none;
    padding: 0.8rem;
    border-radius: 24px;
    background: var(--menu-panel-bg);
    border: 1px solid rgba(102, 116, 125, 0.14);
    box-shadow: var(--shadow);
  }

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

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

  .nav-right {
    gap: 0.55rem;
  }

  .theme-toggle {
    padding: 0 0.8rem;
  }

  .nav-links a {
    justify-content: flex-start;
    border-radius: 16px;
  }

  .hero {
    padding-top: 3rem;
  }

  body.menu-open {
    overflow: hidden;
  }

  .hero-grid {
    gap: 2rem;
  }

  .visual-card {
    min-height: 31rem;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 4.5rem 0;
  }

  .hero-copy h1 {
    max-width: 100%;
  }

  .hero-actions,
  .hero-meta {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .pill {
    width: 100%;
  }

  .topic-grid,
  .highlight-grid,
  .speaker-grid,
  .organizer-grid {
    grid-template-columns: 1fr;
  }

  .visual-card {
    min-height: 26rem;
  }

  .cell-cluster-a {
    top: 2.4rem;
    left: 1.5rem;
    transform: scale(0.88);
    transform-origin: top left;
  }

  .cell-cluster-b {
    right: 0.4rem;
    bottom: 3.6rem;
    transform: scale(0.82);
    transform-origin: bottom right;
  }

  .signal-panel {
    top: 6.9rem;
    right: 1.2rem;
  }

  .analysis-badge {
    left: 1.2rem;
    right: 1.2rem;
    bottom: 1.2rem;
    max-width: none;
  }

  .brand-title {
    font-size: 0.9rem;
  }

  .brand-subtitle {
    font-size: 0.76rem;
  }

  .theme-toggle-text {
    display: none;
  }

  .theme-toggle {
    width: 3rem;
    padding: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0ms !important;
    transition-delay: 0ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}