:root {
  --max-width: 1180px;
  --header-height: 74px;
  --radius: 8px;
  --radius-small: 6px;
  --shadow-soft: 0 18px 42px rgba(0, 0, 0, 0.16);
  --shadow-hard: 0 18px 0 rgba(0, 0, 0, 0.2);
  --font-body: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Avenir Next", "Trebuchet MS", var(--font-body);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 18px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

body.variant-cosmos {
  --bg: #061018;
  --page: #08131d;
  --surface: rgba(13, 27, 40, 0.9);
  --surface-strong: #101e2c;
  --text: #eef7ff;
  --muted: #a3b4c3;
  --faint: #72879a;
  --line: rgba(255, 255, 255, 0.13);
  --accent: #f3a13c;
  --accent-2: #1c9ccc;
  --accent-3: #f6d99c;
  --card-text: #eff7ff;
  --card-muted: #a5b6c5;
  --header-bg: rgba(6, 16, 24, 0.86);
}

body.variant-atlas {
  --bg: #f6f0e6;
  --page: #fffaf0;
  --surface: #fffdf8;
  --surface-strong: #f0e6d5;
  --text: #172331;
  --muted: #5b6e7c;
  --faint: #7b8b96;
  --line: rgba(28, 47, 62, 0.16);
  --accent: #cf7826;
  --accent-2: #086d94;
  --accent-3: #f0bd68;
  --card-text: #172331;
  --card-muted: #566a79;
  --header-bg: rgba(255, 250, 240, 0.9);
  --shadow-soft: 0 20px 44px rgba(77, 59, 36, 0.12);
}

body.variant-control {
  --bg: #070b10;
  --page: #0a0f15;
  --surface: #101820;
  --surface-strong: #121e29;
  --text: #f4f8fb;
  --muted: #9eadb9;
  --faint: #6e7f8e;
  --line: rgba(159, 187, 205, 0.18);
  --accent: #f0a63a;
  --accent-2: #25b1ca;
  --accent-3: #e8d39a;
  --card-text: #f4f8fb;
  --card-muted: #a0afbc;
  --header-bg: rgba(8, 11, 16, 0.9);
  --shadow-soft: 0 12px 0 rgba(37, 177, 202, 0.08);
}

body.variant-cinema {
  --bg: #130f0a;
  --page: #1b1710;
  --surface: #241d14;
  --surface-strong: #302317;
  --text: #fff7e9;
  --muted: #c9b99e;
  --faint: #8f7e66;
  --line: rgba(255, 225, 177, 0.16);
  --accent: #f0ad49;
  --accent-2: #48a9c6;
  --accent-3: #f8d99f;
  --card-text: #fff7e9;
  --card-muted: #cabaa1;
  --header-bg: rgba(19, 15, 10, 0.9);
}

a {
  color: inherit;
}

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

.page-shell {
  min-height: 100vh;
  overflow: clip;
  background:
    linear-gradient(180deg, transparent 0, transparent 420px, rgba(255, 255, 255, 0.02) 420px),
    var(--page);
}

.variant-atlas .page-shell {
  background:
    linear-gradient(90deg, rgba(8, 109, 148, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(8, 109, 148, 0.06) 1px, transparent 1px),
    var(--page);
  background-size: 56px 56px, 56px 56px, auto;
}

.variant-control .page-shell {
  background:
    linear-gradient(90deg, rgba(37, 177, 202, 0.07) 1px, transparent 1px),
    linear-gradient(180deg, rgba(37, 177, 202, 0.05) 1px, transparent 1px),
    var(--page);
  background-size: 44px 44px, 44px 44px, auto;
}

.variant-cinema .page-shell {
  background:
    repeating-linear-gradient(90deg, rgba(240, 173, 73, 0.08) 0 16px, transparent 16px 40px),
    linear-gradient(180deg, #130f0a 0, #1b1710 44%, #211910 100%);
}

.container {
  width: min(var(--max-width), calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(18px);
}

.header-row {
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  font-family: var(--font-display);
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.brand span {
  white-space: nowrap;
}

.nav-links,
.version-links {
  display: flex;
  align-items: center;
  gap: 6px;
  justify-content: flex-end;
}

.nav-links a,
.version-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 9px 10px;
  border-radius: var(--radius-small);
  border: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.is-active,
.version-links a:hover,
.version-links a.is-active {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
}

.variant-atlas .nav-links a:hover,
.variant-atlas .nav-links a.is-active,
.variant-atlas .version-links a:hover,
.variant-atlas .version-links a.is-active {
  background: rgba(8, 109, 148, 0.08);
}

.version-links {
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  padding: 78px 0 34px;
}

.variant-cosmos .hero::before,
.variant-cosmos .hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.variant-cosmos .hero::before {
  background-image:
    radial-gradient(circle at 10% 20%, rgba(246, 217, 156, 0.5) 1px, transparent 2px),
    radial-gradient(circle at 86% 16%, rgba(255, 255, 255, 0.55) 1px, transparent 2px),
    radial-gradient(circle at 78% 64%, rgba(28, 156, 204, 0.45) 1px, transparent 2px);
  background-size: 180px 160px, 220px 210px, 260px 230px;
}

.variant-cosmos .hero::after {
  background: linear-gradient(180deg, transparent 0, rgba(6, 16, 24, 0.95) 100%);
  top: 70%;
}

.variant-atlas .hero {
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(8, 109, 148, 0.11), transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.55), transparent);
}

.variant-control .hero {
  padding-top: 48px;
  border-bottom: 1px solid var(--line);
}

.variant-cinema .hero {
  border-bottom: 1px solid var(--line);
}

.variant-cinema .hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  height: 72px;
  pointer-events: none;
  opacity: 0.52;
  background:
    linear-gradient(90deg, transparent 0 12px, rgba(240, 173, 73, 0.38) 12px 18px, transparent 18px 30px),
    linear-gradient(180deg, transparent 0 18px, rgba(240, 173, 73, 0.24) 18px 21px, transparent 21px 51px, rgba(240, 173, 73, 0.24) 51px 54px, transparent 54px);
  background-size: 42px 72px, 100% 72px;
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, 0.78fr);
  gap: 56px;
  align-items: center;
}

.variant-control .hero-layout {
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1fr);
}

.hero-copy {
  max-width: 760px;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.section-kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(72, 169, 198, 0.14);
}

.hero h1 {
  margin: 18px 0 20px;
  font-family: var(--font-display);
  line-height: 0.95;
}

.hero h1 > span {
  display: block;
  font-size: clamp(4rem, 8vw, 7.6rem);
  font-weight: 900;
  color: var(--text);
}

.variant-atlas .hero h1 > span {
  color: var(--accent-2);
}

.variant-cinema .hero h1 > span {
  text-shadow: 0 3px 0 rgba(240, 173, 73, 0.28);
}

.hero h1 small {
  display: block;
  max-width: 760px;
  margin-top: 14px;
  color: var(--accent-3);
  font-size: clamp(1.35rem, 2.6vw, 2.3rem);
  line-height: 1.08;
  font-weight: 800;
}

.variant-atlas .hero h1 small {
  color: var(--text);
}

.hero p {
  max-width: 690px;
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 800;
  font-size: 0.93rem;
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #111820;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.variant-atlas .button.secondary {
  background: rgba(8, 109, 148, 0.08);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.variant-control .hero-visual {
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, rgba(37, 177, 202, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(37, 177, 202, 0.08) 1px, transparent 1px),
    rgba(255, 255, 255, 0.02);
  background-size: 28px 28px;
}

.variant-atlas .hero-visual {
  min-height: 380px;
}

.hero-visual img {
  position: relative;
  z-index: 2;
  width: min(310px, 78%);
  border-radius: 24px;
  box-shadow: var(--shadow-soft);
}

.variant-atlas .hero-visual img {
  transform: rotate(-4deg);
  border: 8px solid #fff;
}

.variant-control .hero-visual img {
  width: min(250px, 70%);
  border-radius: var(--radius);
  box-shadow: none;
  filter: saturate(1.08) contrast(1.08);
}

.variant-cinema .hero-visual img {
  border-radius: 4px;
  border: 8px solid rgba(255, 247, 233, 0.08);
}

.orbit {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--accent) 58%, transparent);
  border-radius: 50%;
  transform: rotate(-18deg);
}

.orbit-a {
  width: 96%;
  height: 48%;
}

.orbit-b {
  width: 78%;
  height: 38%;
  border-color: color-mix(in srgb, var(--accent-2) 48%, transparent);
  transform: rotate(23deg);
}

.signal {
  position: absolute;
  z-index: 3;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  background: var(--surface);
  color: var(--text);
  font-size: 0.74rem;
  font-weight: 900;
}

.signal-a {
  top: 10%;
  left: 8%;
}

.signal-b {
  right: 9%;
  bottom: 17%;
}

.signal-c {
  left: 12%;
  bottom: 12%;
}

.fact-strip {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 48px;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact-strip article {
  min-height: 108px;
  padding: 22px;
  background: var(--surface);
}

.fact-strip span {
  display: block;
  color: var(--faint);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.fact-strip strong {
  display: block;
  margin-top: 8px;
  color: var(--card-text);
  font-size: 1.02rem;
  line-height: 1.35;
}

.section {
  padding: 76px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: min(100%, 1120px);
  margin-bottom: 30px;
}

.section-heading h2,
.submission-panel h2,
.contact-layout h2 {
  margin: 11px 0 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.02;
  text-wrap: balance;
}

.variant-atlas .section-heading h2,
.variant-atlas .submission-panel h2,
.variant-atlas .contact-layout h2 {
  color: var(--text);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.prose {
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.8;
}

.prose p {
  margin: 0 0 18px;
}

.date-grid,
.topic-grid,
.speaker-grid,
.organizer-grid,
.schedule-grid {
  display: grid;
  gap: 16px;
}

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

.date-card,
.topic-card,
.speaker-card,
.schedule-block,
.organizer-card,
.submission-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--card-text);
}

.variant-atlas .date-card,
.variant-atlas .topic-card,
.variant-atlas .speaker-card,
.variant-atlas .schedule-block,
.variant-atlas .organizer-card,
.variant-atlas .submission-panel {
  box-shadow: var(--shadow-soft);
}

.date-card {
  min-height: 190px;
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.variant-control .date-card {
  min-height: 160px;
}

.date-card .index {
  color: var(--accent);
  font-weight: 900;
  font-size: 0.78rem;
}

.date-card h3 {
  margin: 16px 0 10px;
  font-size: 1.03rem;
  line-height: 1.25;
}

.date-card strong {
  color: var(--accent-3);
  font-size: 1.28rem;
  line-height: 1.18;
}

.variant-atlas .date-card strong {
  color: var(--accent-2);
}

.date-card p {
  margin: auto 0 0;
  color: var(--card-muted);
  font-size: 0.9rem;
}

.cfp-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.submission-panel {
  padding: 28px;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.submission-panel p {
  margin: 18px 0 0;
  color: var(--card-muted);
  line-height: 1.7;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.chip-row span {
  display: inline-flex;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  color: var(--card-text);
  background: rgba(255, 255, 255, 0.05);
  font-size: 0.82rem;
  font-weight: 800;
}

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

.topic-card {
  padding: 24px;
}

.topic-card h3 {
  margin: 0 0 18px;
  color: var(--card-text);
  font-size: 1.14rem;
}

.topic-card ul,
.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.topic-card li {
  position: relative;
  padding-left: 18px;
  margin: 0 0 13px;
  color: var(--card-muted);
  font-size: 0.93rem;
}

.topic-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 7px;
  height: 2px;
  background: var(--accent);
}

.cfp-action-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: stretch;
  margin-top: 10px;
}

.submission-action {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  min-height: 58px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--accent) 6%, transparent), transparent 55%),
    color-mix(in srgb, var(--surface) 92%, white);
}

.submission-cta {
  width: 126px;
  min-height: 42px;
  flex: 0 0 auto;
  appearance: none;
  border: 0;
  border-radius: var(--radius-small);
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 2px;
  padding: 9px 13px;
  font: inherit;
  text-align: left;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 14px 30px color-mix(in srgb, var(--accent) 24%, transparent);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.submission-cta:hover,
.submission-cta:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 16px 34px color-mix(in srgb, var(--accent) 30%, transparent);
  text-decoration: none;
}

.submission-cta:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent-2) 40%, white);
  outline-offset: 3px;
}

.submission-cta span {
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.86;
}

.submission-cta strong {
  font-size: 1.02rem;
  line-height: 1.05;
}

.submission-action p,
.award-callout p {
  margin: 0;
  color: var(--card-muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

.award-callout {
  min-width: 0;
  min-height: 118px;
  padding: 20px 22px;
  border: 1px solid color-mix(in srgb, #d33128 34%, var(--line));
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(211, 49, 40, 0.13), rgba(211, 49, 40, 0.035)),
    var(--surface);
  box-shadow: inset 0 0 0 1px rgba(211, 49, 40, 0.08);
}

.award-callout span {
  display: block;
  margin-bottom: 10px;
  color: #c22720;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.award-callout strong {
  color: #c22720;
}

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

.speaker-card {
  min-height: 250px;
  padding: 22px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 18px;
}

.speaker-card:not(.speaker-card-tbd):not(.speaker-card-placeholder) {
  grid-template-rows: 72px 96px auto;
  align-content: start;
}

.speaker-card-placeholder {
  min-height: 500px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.speaker-card-tbd {
  grid-column: 1 / -1;
  min-height: 210px;
  grid-template-columns: auto minmax(0, 1fr) minmax(220px, 0.45fr);
  grid-template-rows: none;
  align-items: center;
}

.speaker-token {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.86), transparent 26%),
    linear-gradient(135deg, #0f3854, #0e4d5c 54%, #d97932);
  color: #fff;
  border: 4px solid rgba(255, 255, 255, 0.9);
  font-weight: 900;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
}

.speaker-identity {
  min-height: 176px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
}

.speaker-card-placeholder .speaker-token {
  width: 96px;
  height: 96px;
  color: rgba(255, 255, 255, 0.94);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  opacity: 0.86;
}

.speaker-card-tbd .speaker-token {
  width: 86px;
  height: 86px;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.speaker-card h3,
.organizer-card h3 {
  margin: 0;
  color: var(--card-text);
}

.speaker-card p,
.organizer-card p {
  margin: 6px 0 0;
  color: var(--card-muted);
}

.speaker-talk {
  align-self: end;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.speaker-card:not(.speaker-card-tbd):not(.speaker-card-placeholder) .speaker-talk {
  align-self: start;
}

.speaker-card-placeholder .speaker-talk {
  align-self: stretch;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 7%, var(--surface));
}

.speaker-card-tbd .speaker-talk {
  align-self: center;
  padding-top: 0;
  padding-left: 22px;
  border-top: 0;
  border-left: 1px solid var(--line);
}

.speaker-talk span {
  display: block;
  margin-bottom: 6px;
  color: var(--faint);
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.speaker-talk strong {
  color: var(--card-text);
}

.speaker-detail-placeholder {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 92%, white);
}

.speaker-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--card-text);
}

.speaker-detail-header strong {
  font-size: 1rem;
}

.speaker-detail-header span {
  flex: 0 0 auto;
  padding: 6px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 8%, var(--surface));
  color: var(--faint);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.speaker-detail-placeholder p {
  margin-top: 13px;
  line-height: 1.62;
}

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

.schedule-block {
  overflow: hidden;
}

.block-heading {
  padding: 24px 24px 10px;
}

.block-heading h3 {
  margin: 8px 0 0;
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
}

.schedule-table th,
.schedule-table td {
  padding: 15px 20px;
  text-align: left;
  border-top: 1px solid var(--line);
  vertical-align: top;
}

.schedule-table th {
  color: var(--faint);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.schedule-table td {
  color: var(--card-muted);
  font-size: 0.92rem;
}

.schedule-table td strong {
  color: var(--card-text);
}

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

.organizer-card {
  padding: 26px 18px 22px;
  text-align: center;
}

.organizer-avatar {
  width: 112px;
  height: 112px;
  margin: 0 auto 16px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 5px solid rgba(255, 255, 255, 0.9);
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.86), transparent 26%),
    linear-gradient(135deg, #0f3854, #0e4d5c 54%, #d97932);
}

.organizer-avatar-shengqiong {
  object-position: 50% 56%;
}

.organizer-avatar-placeholder {
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.7rem;
  font-weight: 900;
}

.organizer-card a {
  display: inline-flex;
  margin-top: 16px;
  padding: 7px 10px;
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.06);
  color: var(--card-text);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 800;
}

.variant-atlas .organizer-card a {
  background: rgba(8, 109, 148, 0.08);
}

.contact-section {
  padding-bottom: 54px;
}

.contact-layout {
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 34px;
  align-items: start;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.contact-list li {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.contact-list a {
  color: var(--text);
  font-weight: 900;
  text-decoration: none;
}

.contact-list span {
  color: var(--muted);
}

.site-footer {
  padding: 28px 0 40px;
  color: var(--faint);
  font-size: 0.9rem;
}

.variant-atlas .site-footer {
  color: var(--muted);
}

.variant-atlas .hero-layout {
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.66fr);
}

.variant-atlas .fact-strip {
  box-shadow: var(--shadow-soft);
}

.variant-atlas .section + .section {
  border-top-color: rgba(28, 47, 62, 0.1);
}

.variant-control .section {
  padding: 52px 0;
}

.variant-control .section-heading h2,
.variant-control .submission-panel h2 {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
}

.variant-control .speaker-card,
.variant-control .organizer-card,
.variant-control .date-card,
.variant-control .topic-card {
  border-left: 3px solid var(--accent-2);
}

.variant-control .fact-strip article {
  min-height: 86px;
  padding: 16px;
}

.variant-cinema .button.primary {
  box-shadow: 0 0 0 3px rgba(240, 173, 73, 0.16);
}

.variant-cinema .section-heading h2 {
  max-width: 850px;
}

.variant-cinema .speaker-card,
.variant-cinema .organizer-card,
.variant-cinema .date-card,
.variant-cinema .topic-card,
.variant-cinema .schedule-block,
.variant-cinema .submission-panel {
  background:
    linear-gradient(180deg, rgba(255, 247, 233, 0.04), transparent),
    var(--surface);
}

@media (max-width: 1050px) {
  .header-row {
    grid-template-columns: auto auto 1fr;
  }

  .nav-toggle {
    display: inline-block;
    justify-self: end;
  }

  .nav-links {
    position: absolute;
    left: 18px;
    right: 18px;
    top: calc(var(--header-height) - 8px);
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface-strong);
    box-shadow: var(--shadow-soft);
  }

  .nav-links.is-open {
    display: grid;
  }

  .version-links {
    justify-self: end;
    border-left: 0;
    padding-left: 0;
  }

  .hero-layout,
  .variant-control .hero-layout,
  .variant-atlas .hero-layout,
  .two-column,
  .cfp-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .submission-panel {
    position: static;
  }

  .hero-visual {
    min-height: 340px;
  }

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

@media (max-width: 720px) {
  :root {
    --header-height: 68px;
  }

  .container {
    width: min(100% - 24px, var(--max-width));
  }

  .header-row {
    gap: 10px;
  }

  .brand span {
    font-size: 0.96rem;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .version-links a {
    padding: 7px 8px;
    font-size: 0.8rem;
  }

  .hero {
    padding-top: 48px;
  }

  .hero h1 > span {
    font-size: 3.5rem;
  }

  .hero h1 small {
    font-size: 1.24rem;
  }

  .hero p {
    font-size: 0.98rem;
  }

  .hero-visual {
    min-height: 270px;
  }

  .signal {
    font-size: 0.66rem;
  }

  .date-grid,
  .topic-grid,
  .speaker-grid,
  .organizer-grid,
  .fact-strip {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 54px 0;
  }

  .section-heading h2,
  .submission-panel h2,
  .contact-layout h2 {
    font-size: 1.8rem;
  }

  .schedule-block {
    padding-bottom: 8px;
  }

  .cfp-action-panel {
    grid-template-columns: 1fr;
  }

  .submission-action {
    align-items: flex-start;
  }

  .speaker-card:not(.speaker-card-tbd) {
    grid-template-rows: auto;
  }

  .speaker-card-tbd {
    grid-template-columns: 1fr;
  }

  .speaker-card-tbd .speaker-token {
    width: 72px;
    height: 72px;
  }

  .speaker-card-tbd .speaker-talk {
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .schedule-table,
  .schedule-table thead,
  .schedule-table tbody,
  .schedule-table tr,
  .schedule-table th,
  .schedule-table td {
    display: block;
  }

  .schedule-table thead {
    display: none;
  }

  .schedule-table tr {
    padding: 14px 18px;
    border-top: 1px solid var(--line);
  }

  .schedule-table td {
    border-top: 0;
    padding: 5px 0;
  }

  .schedule-table td::before {
    content: attr(data-label);
    display: block;
    color: var(--faint);
    font-size: 0.7rem;
    font-weight: 900;
    text-transform: uppercase;
  }

  .contact-list li {
    display: block;
  }

  .contact-list span {
    display: block;
    margin-top: 4px;
  }
}