:root {
  --bg: #07121f;
  --bg-soft: #0a1828;
  --surface: rgba(13, 31, 50, 0.82);
  --surface-solid: #0d1f32;
  --surface-2: #122a43;
  --card: #10243a;
  --card-2: #14304d;
  --text: #eef7ff;
  --muted: #a8bed2;
  --soft: #d8ecff;
  --blue: #4da3ff;
  --cyan: #69d7ff;
  --amber: #f0b64a;
  --coral: #ff7d68;
  --line: rgba(164, 207, 255, 0.16);
  --line-strong: rgba(197, 226, 255, 0.28);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --max: 1180px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 18% 0%, rgba(77, 163, 255, 0.22), transparent 34rem),
    radial-gradient(circle at 88% 24rem, rgba(105, 215, 255, 0.1), transparent 26rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
}

body[data-theme="light"] {
  --bg: #edf6ff;
  --bg-soft: #f8fbff;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-solid: #ffffff;
  --surface-2: #eef7ff;
  --card: #ffffff;
  --card-2: #f3f9ff;
  --text: #0b1d30;
  --muted: #4d6478;
  --soft: #20394f;
  --blue: #166fc2;
  --cyan: #0086b3;
  --amber: #f0b64a;
  --coral: #c84f3e;
  --line: rgba(13, 49, 82, 0.14);
  --line-strong: rgba(13, 49, 82, 0.24);
  --shadow: 0 24px 70px rgba(13, 49, 82, 0.14);
}

body::selection {
  background: var(--cyan);
  color: #06101a;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  min-height: var(--header-height);
  padding: 12px clamp(18px, 4vw, 54px);
  background: rgba(5, 15, 27, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--text);
  font-weight: 900;
}

.brand img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 50%;
  background: #ffffff;
}

.brand span {
  white-space: nowrap;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 44px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.site-header.is-menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header.is-menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.is-menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: clamp(12px, 2.2vw, 30px);
  min-width: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.main-nav a {
  position: relative;
  flex: 0 0 auto;
  padding: 8px 0;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: 1px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  content: "";
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--text);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-action,
.primary-action,
.secondary-action,
.copy-button,
.theme-toggle,
.docs-panel a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 900;
  line-height: 1.15;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.header-action,
.primary-action {
  background: linear-gradient(135deg, var(--amber), #ffd66f);
  color: #101721;
  box-shadow: 0 16px 36px rgba(240, 182, 74, 0.24);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  min-width: 150px;
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--line-strong);
  color: var(--text);
  cursor: pointer;
  font: inherit;
}

.theme-toggle-icon {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ffffff 0 48%, var(--blue) 49% 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.42);
}

.header-action:hover,
.primary-action:hover,
.secondary-action:hover,
.copy-button:hover,
.theme-toggle:hover,
.docs-panel a:hover {
  transform: translateY(-2px);
}

.secondary-action {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(216, 236, 255, 0.34);
  color: var(--text);
}

.hero {
  position: relative;
  min-height: clamp(760px, calc(100svh - var(--header-height)), 980px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 76% 20%, rgba(105, 215, 255, 0.22), transparent 28rem),
    linear-gradient(90deg, rgba(4, 13, 24, 0.98) 0%, rgba(6, 20, 34, 0.94) 42%, rgba(7, 24, 42, 0.72) 66%, rgba(7, 24, 42, 0.26) 100%),
    linear-gradient(180deg, rgba(7, 18, 31, 0.02) 0%, rgba(7, 18, 31, 0.26) 62%, var(--bg) 100%),
    url("assets/hero/conference-tech-hero.png");
  background-position: center, center, center, center;
  background-size: cover, cover, cover, cover;
}

.hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(216, 236, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(216, 236, 255, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.88) 46%, transparent 86%);
  content: "";
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 26%;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, var(--bg));
  content: "";
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(68px, 8vw, 104px) 0 clamp(72px, 9vw, 120px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  max-width: min(760px, 100%);
  color: #bff0ff;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
}

h1 {
  max-width: 980px;
  font-size: clamp(2.75rem, 6.2vw, 5.6rem);
  letter-spacing: 0;
}

h2 {
  letter-spacing: 0;
}

.hero-lede {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(238, 247, 255, 0.88);
  font-size: clamp(1.08rem, 2vw, 1.38rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(860px, 100%);
  margin: 44px 0 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--line-strong);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-facts div {
  padding: 18px;
  background: rgba(9, 28, 46, 0.72);
}

.hero-facts dt {
  margin: 0 0 6px;
  color: rgba(216, 236, 255, 0.66);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.hero-facts dd {
  margin: 0;
  color: #ffffff;
  font-weight: 900;
}

.quick-band {
  position: relative;
  background: linear-gradient(180deg, var(--bg), var(--bg-soft));
  border-block: 1px solid var(--line);
}

.band-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
}

.band-grid div {
  min-height: 114px;
  padding: 24px 18px;
  border-right: 1px solid var(--line);
}

.band-grid div:first-child {
  border-left: 1px solid var(--line);
}

.band-grid strong,
.band-grid span {
  display: block;
}

.band-grid strong {
  color: var(--text);
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  line-height: 1.1;
}

.band-grid span {
  margin-top: 8px;
  color: var(--muted);
}

.section {
  padding: clamp(64px, 8vw, 104px) clamp(18px, 4vw, 54px);
}

.section-light,
.section-paper {
  background: linear-gradient(180deg, var(--bg-soft), var(--bg));
}

.section-paper {
  background:
    radial-gradient(circle at 12% 8%, rgba(77, 163, 255, 0.16), transparent 28rem),
    linear-gradient(180deg, #0a1828, #07121f);
}

.section-dark {
  background:
    radial-gradient(circle at 82% 12%, rgba(105, 215, 255, 0.12), transparent 24rem),
    #06101a;
  color: var(--text);
}

.section-heading {
  width: min(var(--max), 100%);
  margin: 0 auto 34px;
}

.section-heading h2 {
  max-width: 860px;
  color: #ffffff;
  font-size: clamp(2rem, 4.4vw, 4rem);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(28px, 5vw, 72px);
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.about-copy {
  font-size: clamp(1.05rem, 1.7vw, 1.26rem);
}

.about-copy p {
  margin: 0 0 18px;
  color: var(--soft);
}

.about-points,
.tracks-grid,
.participation-grid,
.committee-list,
.contacts-layout,
.requirements {
  width: min(var(--max), 100%);
  margin-inline: auto;
}

.about-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.about-points article,
.track-card,
.info-card,
.committee-list article {
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(20, 48, 77, 0.86), rgba(13, 31, 50, 0.92));
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.17);
}

.about-points article {
  padding: 20px;
}

.about-points span,
.track-card span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-weight: 900;
}

.about-points h3,
.track-card h3,
.info-card h3,
.requirements h3,
.committee-list h3,
.contact-panel h3,
.docs-panel h3,
.place-panel h3 {
  color: #ffffff;
  font-size: 1.12rem;
}

.about-points p,
.track-card p,
.info-card p,
.committee-list p,
.requirements li,
.contact-panel p,
.place-panel p {
  color: var(--muted);
}

.tracks-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.track-card {
  padding: 24px;
}

.track-card.featured {
  background:
    linear-gradient(135deg, rgba(77, 163, 255, 0.34), rgba(105, 215, 255, 0.08)),
    var(--card-2);
  border-color: rgba(105, 215, 255, 0.35);
}

.track-card.featured span {
  color: var(--amber);
}

.program-shell {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.day-tabs {
  display: grid;
  grid-template-columns: repeat(7, minmax(92px, 1fr));
  gap: 8px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-color: var(--blue) transparent;
}

.day-tab {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.day-tab.is-active,
.day-tab:hover,
.day-tab:focus-visible {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-color: transparent;
  color: #05101b;
}

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

.day-panel {
  overflow: visible;
}

.day-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(77, 163, 255, 0.24), rgba(255, 125, 104, 0.07)),
    rgba(13, 31, 50, 0.72);
  box-shadow: var(--shadow);
}

.day-title h3 {
  font-size: clamp(1.25rem, 2.6vw, 2rem);
}

.day-title span {
  color: var(--cyan);
  font-weight: 900;
}

.timeline {
  position: relative;
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0 0 0 58px;
  list-style: none;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 20px;
  width: 2px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--cyan), rgba(77, 163, 255, 0.28), var(--amber));
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(118px, 160px) minmax(0, 1fr);
  gap: 18px;
  align-items: flex-start;
}

.timeline li::before {
  content: "";
  position: absolute;
  top: 13px;
  left: -45px;
  z-index: 1;
  width: 16px;
  height: 16px;
  border: 3px solid var(--cyan);
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 0 0 7px rgba(105, 215, 255, 0.12);
}

.timeline time {
  display: inline-grid;
  place-items: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid rgba(105, 215, 255, 0.42);
  border-radius: 999px;
  background: rgba(105, 215, 255, 0.1);
  color: var(--cyan);
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
}

.event-card {
  position: relative;
  min-height: 112px;
  padding: 18px 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(77, 163, 255, 0.1)),
    rgba(13, 31, 50, 0.78);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.2);
}

.event-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 68%, rgba(105, 215, 255, 0.08));
}

.event-kicker {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.timeline li:nth-child(3n) .event-kicker {
  color: var(--amber);
}

.timeline li:nth-child(4n) .event-kicker {
  color: var(--coral);
}

.event-card h4 {
  position: relative;
  z-index: 1;
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
  line-height: 1.25;
}

.event-card p {
  position: relative;
  z-index: 1;
  margin: 8px 0 0;
  max-width: 780px;
  color: var(--muted);
}

.event-tags {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 13px;
}

.event-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 800;
}

.participation-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.info-card {
  padding: 24px;
}

.requirements {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.requirements > div {
  padding: 26px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--cyan);
  border-radius: 8px;
  background: rgba(13, 31, 50, 0.8);
}

.requirements ul {
  margin: 16px 0 0;
  padding-left: 20px;
}

.committee-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.committee-list article {
  padding: 22px;
}

.venue-strip {
  padding: clamp(52px, 7vw, 88px) clamp(18px, 4vw, 54px);
  background:
    linear-gradient(90deg, rgba(5, 15, 27, 0.98), rgba(10, 24, 40, 0.9)),
    var(--bg);
  border-block: 1px solid var(--line);
}

.venue-inner {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(28px, 6vw, 84px);
  align-items: center;
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.venue-copy h2 {
  max-width: 540px;
  margin: 0;
  color: #ffffff;
  font-size: clamp(2rem, 4.2vw, 4rem);
  line-height: 1;
}

.venue-copy p:not(.eyebrow) {
  max-width: 520px;
  margin: 16px 0 0;
  color: var(--muted);
}

.venue-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.venue-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(105, 215, 255, 0.08);
  color: var(--soft);
  font-size: 0.82rem;
  font-weight: 900;
}

.venue-media {
  position: relative;
  min-height: clamp(260px, 26vw, 380px);
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(105, 215, 255, 0.32);
  border-radius: 8px;
  background: var(--surface-solid);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

.venue-media img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: center;
}

.venue-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 15, 27, 0.72), rgba(5, 15, 27, 0.08) 58%),
    linear-gradient(180deg, transparent 48%, rgba(5, 15, 27, 0.72));
}

.venue-media figcaption {
  position: absolute;
  right: 22px;
  bottom: 22px;
  left: 22px;
  z-index: 1;
  max-width: 460px;
}

.venue-media figcaption span {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--cyan);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.venue-media figcaption strong {
  display: block;
  color: #ffffff;
  font-size: clamp(1.15rem, 2vw, 1.7rem);
  line-height: 1.15;
}

.partners {
  padding: clamp(44px, 7vw, 84px) clamp(18px, 4vw, 54px);
  background: linear-gradient(180deg, #07121f, #0a1828);
  border-block: 1px solid var(--line);
}

.partners-inner {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.security-emblem {
  position: relative;
  display: grid;
  grid-template-columns: minmax(170px, 0.36fr) minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
  align-items: center;
  width: min(900px, 100%);
  margin: 0 auto 36px;
  padding: clamp(22px, 3.5vw, 34px);
  overflow: hidden;
  border: 1px solid rgba(240, 182, 74, 0.34);
  border-radius: 8px;
  background:
    radial-gradient(circle at 18% 50%, rgba(240, 182, 74, 0.28), transparent 18rem),
    linear-gradient(135deg, rgba(20, 48, 77, 0.98), rgba(9, 22, 37, 0.94));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

.security-emblem::after {
  display: none;
}

.security-emblem-mark {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 230px;
  overflow: hidden;
  background: transparent;
}

.security-emblem-mark img {
  width: min(220px, 78%);
  max-height: 240px;
  object-fit: contain;
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, 0.22));
}

.security-emblem-copy {
  position: relative;
  z-index: 1;
}

.security-emblem-copy h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(2rem, 4.6vw, 4.2rem);
  line-height: 1;
}

.security-emblem-copy p:not(.eyebrow) {
  max-width: 590px;
  margin: 14px 0 0;
  color: var(--soft);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
}

.partners-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(130px, 1fr));
  gap: 28px 38px;
  align-items: center;
  width: min(862px, 100%);
  margin: 0 auto 30px;
  padding: 42px;
  border: 1px solid #ffffff;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
}

.partners-board img {
  width: 100%;
  height: 92px;
  object-fit: contain;
  background: #ffffff;
}

.partner-logos {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
  align-items: center;
}

.partner-logos figure {
  display: grid;
  place-items: center;
  width: 100%;
  height: 86px;
  margin: 0;
  padding: 14px;
  border: 1px solid #ffffff;
  border-radius: 8px;
  background: #ffffff;
}

.partner-logos img {
  width: 100%;
  height: 58px;
  object-fit: contain;
  background: #ffffff;
}

.contacts-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr;
  gap: 16px;
}

.contact-panel,
.docs-panel,
.place-panel {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(13, 31, 50, 0.78);
}

.mail-link {
  display: inline-block;
  margin: 8px 0 18px;
  color: var(--cyan);
  font-size: clamp(1.2rem, 2.6vw, 1.8rem);
  font-weight: 900;
}

.copy-button {
  background: transparent;
  border-color: var(--line-strong);
  color: #ffffff;
  cursor: pointer;
  font: inherit;
}

.copy-button.is-copied {
  background: var(--cyan);
  color: #06101a;
}

.docs-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.docs-panel a {
  justify-content: flex-start;
  background: #ffffff;
  color: #0b2034;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(18px, 4vw, 54px);
  background: #050d17;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--cyan);
  font-weight: 900;
}

body[data-theme="light"] .site-header {
  background: rgba(248, 251, 255, 0.88);
}

body[data-theme="light"] .theme-toggle {
  background: #ffffff;
}

body[data-theme="light"] .theme-toggle-icon {
  background: linear-gradient(135deg, #07121f 0 48%, #f7d779 49% 100%);
  box-shadow: inset 0 0 0 1px rgba(13, 49, 82, 0.18);
}

body[data-theme="light"] .hero {
  background:
    radial-gradient(circle at 76% 20%, rgba(77, 163, 255, 0.22), transparent 28rem),
    linear-gradient(90deg, rgba(248, 251, 255, 0.98) 0%, rgba(238, 247, 255, 0.92) 42%, rgba(226, 241, 255, 0.62) 68%, rgba(226, 241, 255, 0.18) 100%),
    linear-gradient(180deg, rgba(248, 251, 255, 0) 0%, rgba(248, 251, 255, 0.22) 62%, var(--bg) 100%),
    url("assets/hero/conference-tech-hero.png");
  background-position: center, center, center, center;
  background-size: cover, cover, cover, cover;
}

body[data-theme="light"] .hero::after {
  background: linear-gradient(180deg, transparent, var(--bg));
}

body[data-theme="light"] .hero .eyebrow {
  color: #075f9f;
}

body[data-theme="light"] .hero-lede {
  color: #233a50;
}

body[data-theme="light"] .secondary-action {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(13, 49, 82, 0.28);
  color: #0b1d30;
}

body[data-theme="light"] .hero-facts {
  background: rgba(13, 49, 82, 0.18);
  border-color: rgba(13, 49, 82, 0.18);
}

body[data-theme="light"] .hero-facts div {
  background: rgba(255, 255, 255, 0.8);
}

body[data-theme="light"] .hero-facts dt {
  color: #587087;
}

body[data-theme="light"] .hero-facts dd,
body[data-theme="light"] .section-heading h2,
body[data-theme="light"] .venue-copy h2,
body[data-theme="light"] .security-emblem-copy h2,
body[data-theme="light"] .about-points h3,
body[data-theme="light"] .track-card h3,
body[data-theme="light"] .info-card h3,
body[data-theme="light"] .requirements h3,
body[data-theme="light"] .committee-list h3,
body[data-theme="light"] .contact-panel h3,
body[data-theme="light"] .docs-panel h3,
body[data-theme="light"] .place-panel h3 {
  color: #0b1d30;
}

body[data-theme="light"] .quick-band,
body[data-theme="light"] .section-light,
body[data-theme="light"] .section-paper,
body[data-theme="light"] .venue-strip,
body[data-theme="light"] .partners,
body[data-theme="light"] .site-footer {
  background: linear-gradient(180deg, #f8fbff, #edf6ff);
}

body[data-theme="light"] .section-dark {
  background: linear-gradient(180deg, #eef7ff, #f8fbff);
  color: #0b1d30;
}

body[data-theme="light"] .about-points article,
body[data-theme="light"] .track-card,
body[data-theme="light"] .info-card,
body[data-theme="light"] .committee-list article,
body[data-theme="light"] .requirements > div,
body[data-theme="light"] .contact-panel,
body[data-theme="light"] .docs-panel,
body[data-theme="light"] .place-panel {
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 12px 34px rgba(13, 49, 82, 0.08);
}

body[data-theme="light"] .day-title,
body[data-theme="light"] .event-card {
  background:
    linear-gradient(135deg, rgba(22, 111, 194, 0.08), rgba(0, 134, 179, 0.05)),
    rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 34px rgba(13, 49, 82, 0.08);
}

body[data-theme="light"] .timeline::before {
  background: linear-gradient(180deg, #0086b3, rgba(22, 111, 194, 0.28), #f0b64a);
}

body[data-theme="light"] .timeline li::before {
  background: #edf6ff;
}

body[data-theme="light"] .timeline time {
  background: rgba(0, 134, 179, 0.08);
  color: #00799f;
}

body[data-theme="light"] .event-card h4 {
  color: #0b1d30;
}

body[data-theme="light"] .event-tags span {
  background: rgba(255, 255, 255, 0.66);
  color: #20394f;
}

body[data-theme="light"] .track-card.featured {
  background: linear-gradient(135deg, rgba(22, 111, 194, 0.14), rgba(0, 134, 179, 0.07)), #ffffff;
}

body[data-theme="light"] .event-card p,
body[data-theme="light"] .venue-copy p:not(.eyebrow),
body[data-theme="light"] .security-emblem-copy p:not(.eyebrow),
body[data-theme="light"] .place-panel p {
  color: #20394f;
}

body[data-theme="light"] .venue-meta span {
  background: rgba(0, 134, 179, 0.08);
  color: #20394f;
}

body[data-theme="light"] .venue-media {
  border-color: rgba(13, 49, 82, 0.16);
  box-shadow: 0 24px 70px rgba(13, 49, 82, 0.14);
}

body[data-theme="light"] .security-emblem {
  background:
    radial-gradient(circle at 16% 50%, rgba(240, 182, 74, 0.22), transparent 18rem),
    linear-gradient(135deg, #ffffff, #eef7ff);
  border-color: rgba(13, 49, 82, 0.16);
  box-shadow: 0 24px 70px rgba(13, 49, 82, 0.14);
}

body[data-theme="light"] .security-emblem-mark {
  background: transparent;
}

body[data-theme="light"] .copy-button {
  color: #0b1d30;
}

body[data-theme="light"] .site-footer {
  color: #4d6478;
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

@media (min-width: 1600px) {
  :root {
    --max: 1320px;
  }

  .hero {
    min-height: 900px;
  }
}

@media (max-width: 1120px) {
  .site-header {
    grid-template-columns: auto 1fr auto;
    gap: 16px;
  }

  .main-nav {
    justify-content: flex-end;
    gap: 16px;
  }

  .about-layout,
  .venue-inner,
  .contacts-layout {
    grid-template-columns: 1fr;
  }

  .security-emblem {
    grid-template-columns: minmax(140px, 0.42fr) minmax(0, 1fr);
  }

  .about-points,
  .tracks-grid,
  .committee-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .band-grid div:nth-child(odd) {
    border-left: 1px solid var(--line);
  }

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

@media (max-width: 1040px) {
  :root {
    --header-height: 68px;
  }

  .site-header {
    grid-template-columns: 1fr;
    align-items: center;
    gap: 10px;
    width: 100%;
    max-width: 100vw;
    overflow: hidden;
    padding: 10px 16px;
    grid-template-areas:
      "brand"
      "tools"
      "nav";
  }

  .brand {
    grid-area: brand;
    padding-right: 58px;
  }

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

  .brand span {
    white-space: normal;
  }

  .menu-toggle {
    position: fixed;
    top: 14px;
    right: 16px;
    z-index: 40;
    display: inline-flex;
    background: var(--surface-solid);
    border-color: var(--line-strong);
    color: var(--text);
    box-shadow: 0 10px 28px rgba(5, 15, 27, 0.14);
  }

  .main-nav {
    grid-area: nav;
    display: none;
    grid-template-columns: 1fr;
    width: auto;
    min-width: 0;
    padding: 10px 0 2px;
    gap: 6px;
    justify-self: stretch;
  }

  .site-header.is-menu-open .main-nav {
    display: grid;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    text-align: center;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a:last-child {
    grid-column: auto;
  }

  .header-tools {
    grid-area: tools;
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    width: auto;
    min-width: 0;
    justify-self: stretch;
  }

  .theme-toggle,
  .header-action {
    min-width: 0;
    width: 100%;
    max-width: 100%;
    padding-right: 12px;
    padding-left: 12px;
    white-space: normal;
  }

  .hero {
    min-height: auto;
    width: 100%;
    max-width: 100vw;
    overflow: hidden;
    background:
      linear-gradient(180deg, rgba(5, 15, 27, 0.12) 0%, rgba(5, 15, 27, 0.62) 30%, var(--bg) 100%),
      linear-gradient(90deg, rgba(4, 13, 24, 0.9), rgba(8, 28, 48, 0.5)),
      url("assets/hero/conference-tech-hero.png");
    background-position: center, center, center center;
    background-size: cover, cover, cover;
  }

  body[data-theme="light"] .hero {
    background:
      linear-gradient(180deg, rgba(248, 251, 255, 0.1) 0%, rgba(248, 251, 255, 0.58) 34%, var(--bg) 100%),
      linear-gradient(90deg, rgba(248, 251, 255, 0.88), rgba(226, 241, 255, 0.38)),
      url("assets/hero/conference-tech-hero.png");
    background-position: center, center, center center;
    background-size: cover, cover, cover;
  }

  .hero-inner {
    width: auto;
    max-width: none;
    margin: 0 16px;
    padding: 86px 0 78px;
  }

  .hero .eyebrow {
    max-width: 100%;
    font-size: 0.72rem;
    overflow-wrap: anywhere;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(1.85rem, 8.4vw, 2.65rem);
    overflow-wrap: anywhere;
  }

  .hero-lede {
    max-width: 100%;
    font-size: 1rem;
    overflow-wrap: anywhere;
  }

  .hero-actions a {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .hero-facts,
  .requirements {
    grid-template-columns: 1fr;
  }

  .hero-facts div {
    padding: 15px;
  }

  .band-grid,
  .about-points,
  .tracks-grid,
  .participation-grid,
  .committee-list,
  .partner-logos {
    grid-template-columns: 1fr;
  }

  .partners-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    width: 100%;
    padding: 22px;
  }

  .security-emblem {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .security-emblem-copy p:not(.eyebrow) {
    margin-inline: auto;
  }

  .security-emblem-mark {
    min-height: 210px;
  }

  .security-emblem-mark img {
    width: min(190px, 62%);
  }

  .venue-media {
    min-height: 280px;
  }

  .partners-board img {
    height: 68px;
  }

  .section {
    padding: 58px 14px;
  }

  .section-heading {
    margin-bottom: 24px;
  }

  .section-heading h2 {
    font-size: clamp(1.8rem, 9vw, 2.7rem);
  }

  .day-tabs {
    grid-template-columns: repeat(7, 92px);
  }

  .day-title {
    align-items: flex-start;
    flex-direction: column;
  }

  .timeline {
    gap: 14px;
    padding-left: 46px;
  }

  .timeline::before {
    left: 16px;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .timeline li::before {
    left: -37px;
  }

  .timeline time {
    justify-self: start;
    white-space: normal;
  }

  .event-card {
    padding: 17px;
  }

  .partners-inner > img {
    padding: 12px;
  }

  .contact-panel,
  .docs-panel,
  .place-panel,
  .requirements > div {
    padding: 20px;
  }

  .site-footer {
    flex-direction: column;
    padding: 24px 14px;
  }
}

@media (max-width: 420px) {
  .hero-inner {
    width: calc(100% - 32px);
  }

  h1 {
    font-size: clamp(1.8rem, 8.9vw, 2.2rem);
  }

  .hero-lede {
    line-height: 1.48;
  }

  .band-grid div {
    min-height: 96px;
    padding: 20px 18px;
  }

  .about-points article,
  .track-card,
  .info-card,
  .committee-list article {
    padding: 20px;
  }

  .venue-strip {
    padding-inline: 14px;
  }

  .venue-copy h2 {
    font-size: clamp(1.8rem, 9vw, 2.55rem);
  }

  .venue-media {
    min-height: 230px;
  }

  .venue-media figcaption {
    right: 16px;
    bottom: 16px;
    left: 16px;
  }

  .security-emblem {
    margin-bottom: 24px;
    padding: 20px;
  }

  .security-emblem-mark {
    min-height: 190px;
  }

  .partners-board {
    padding: 18px;
    gap: 14px;
  }

  .partners-board img {
    height: 60px;
  }
}

@media (max-width: 600px) {
  h1 {
    font-size: clamp(1.85rem, 7.4vw, 2.25rem);
  }
}