/* =========================================================================
   Analytic Day — design system
   Tokens sourced from the approved designer prototype (measured live):
   bg #070B12, text #E8EEF5, accent cyan #2ED3C6, font "Space Grotesk".
   ========================================================================= */

:root {
  --bg: #070B12;
  --bg-soft: #0D1420;
  --bg-elevated: #101928;
  --bg-panel: linear-gradient(170deg, rgba(19, 32, 50, 0.98), rgba(9, 15, 24, 0.98));

  --text: #E8EEF5;
  --text-strong: #F4F8FC;
  --text-muted: #93A3B5;
  --text-faint: #7C8CA0;

  --accent: #2ED3C6;
  --accent-strong: #4BE8DB;
  --accent-ink: #04141A; /* text color on top of accent-filled buttons */
  --accent-soft: rgba(46, 211, 198, 0.12);
  --accent-border: rgba(46, 211, 198, 0.3);

  --danger: #FF5D5D;
  --danger-soft: rgba(255, 93, 93, 0.14);

  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.06);
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.14);

  --font: 'Space Grotesk', system-ui, -apple-system, sans-serif;

  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --container: 1180px;
  --gutter: 24px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 250ms;
  --dur: 500ms;
  --dur-slow: 800ms;

  color-scheme: dark;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Layout helpers ===== */
.ad-container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.ad-section {
  position: relative;
  padding: 110px 0;
}
.ad-section--tight { padding: 80px 0; }
.ad-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}
.ad-h2 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-strong);
  margin-top: 16px;
  line-height: 1.15;
}
.ad-lede {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 640px;
  margin-top: 18px;
  line-height: 1.65;
}

/* ===== Buttons ===== */
.ad-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 30px;
  border-radius: var(--radius-pill);
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.ad-btn svg { transition: transform var(--dur-fast) var(--ease); flex-shrink: 0; }
.ad-btn:hover svg { transform: translateX(5px); }
.ad-btn:active { transform: scale(0.98); }
.ad-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.ad-btn--primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 0 0 rgba(46, 211, 198, 0);
}
.ad-btn--primary:hover { background: var(--accent-strong); box-shadow: 0 8px 30px rgba(46, 211, 198, 0.25); }

.ad-btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--glass-border);
}
.ad-btn--ghost:hover { border-color: var(--accent-border); color: var(--accent-strong); }

.ad-btn--block { width: 100%; justify-content: center; }

/* ===== Cards / glass ===== */
.ad-glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}

/* ===== Scroll-reveal system (driven by js/site.js IntersectionObserver) ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal="scale"] { transform: scale(0.96); }
[data-reveal="scale"].is-visible { transform: scale(1); }
[data-reveal="left"] { transform: translateX(-32px); }
[data-reveal="left"].is-visible { transform: none; }
[data-reveal="right"] { transform: translateX(32px); }
[data-reveal="right"].is-visible { transform: none; }

/* stagger children: reveal group sets custom --d per child via inline style */
[data-reveal-group] > * { transition-delay: var(--d, 0ms); }

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}

/* ===== Responsive base ===== */
@media (max-width: 1024px) {
  .ad-section { padding: 84px 0; }
}
@media (max-width: 768px) {
  :root { --gutter: 20px; }
  .ad-section { padding: 64px 0; }
}
@media (max-width: 390px) {
  :root { --gutter: 16px; }
}

/* =========================================================================
   Nav
   ========================================================================= */
.ad-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 60;
  background: rgba(7, 11, 18, 0);
  border-bottom: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), backdrop-filter var(--dur-fast) var(--ease);
}
.ad-nav.is-scrolled {
  background: rgba(7, 11, 18, 0.72);
  border-bottom-color: var(--line-soft);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.ad-nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.ad-nav__logo {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-strong);
}
.ad-nav__links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  color: var(--text-muted);
}
.ad-nav__links a { transition: color var(--dur-fast) var(--ease); }
.ad-nav__links a:hover { color: var(--text-strong); }
.ad-nav__cta {
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent-border);
  color: var(--accent) !important;
}
.ad-nav__cta:hover { background: var(--accent-soft); }
.ad-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px; height: 38px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}
.ad-nav__toggle span {
  display: block;
  width: 16px; height: 1.5px;
  margin: 0 auto;
  background: var(--text);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.ad-nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.ad-nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.ad-nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.ad-nav__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 0 var(--gutter) 20px;
  background: rgba(7, 11, 18, 0.98);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line-soft);
}
.ad-nav__mobile a {
  padding: 14px 4px;
  font-size: 16px;
  color: var(--text);
  border-bottom: 1px solid var(--line-soft);
}
.ad-nav__mobile a:last-child { border-bottom: none; margin-top: 10px; }

@media (max-width: 900px) {
  .ad-nav__links { display: none; }
  .ad-nav__toggle { display: flex; }
  .ad-nav.is-open .ad-nav__mobile { display: flex; }
}

/* =========================================================================
   Hero
   ========================================================================= */
.ad-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 150px 0 90px;
  overflow: hidden;
}
.ad-hero__bg { position: absolute; inset: 0; z-index: 0; }
.ad-hero__grid {
  position: absolute; inset: -10%;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 30% 30%, black 0%, transparent 75%);
  animation: ad-grid-drift 60s linear infinite;
}
@keyframes ad-grid-drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-64px, -64px); }
}
.ad-hero__glow {
  position: absolute;
  top: -20%; right: -10%;
  width: 60%; height: 70%;
  background: radial-gradient(closest-side, rgba(46, 211, 198, 0.16), transparent 70%);
  filter: blur(10px);
}
.ad-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}
.ad-hero__organizer {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 34px;
}
.ad-hero__organizer img { filter: brightness(0) invert(1); opacity: 0.92; }
.ad-hero__x { color: var(--text-faint); font-size: 14px; }
.ad-hero__title {
  font-size: clamp(52px, 8vw, 96px);
  line-height: 0.98;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-strong);
}
.ad-hero__subtitle {
  margin-top: 26px;
  font-size: clamp(17px, 2vw, 21px);
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.5;
}
.ad-hero__meta {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ad-hero__meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text);
}
.ad-hero__meta-row svg { color: var(--accent); flex-shrink: 0; }
.ad-hero__meta-row--muted { color: var(--text-muted); font-size: 14px; padding-left: 26px; }
.ad-hero__actions {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* QR card */
.ad-qr-card {
  position: relative;
  padding: 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  background: var(--bg-panel);
  box-shadow: 0 0 0 rgba(46, 211, 198, 0);
  animation: ad-qr-breathe 4.5s ease-in-out infinite;
}
@keyframes ad-qr-breathe {
  0%, 100% { box-shadow: 0 0 24px rgba(46, 211, 198, 0.08); }
  50% { box-shadow: 0 0 44px rgba(46, 211, 198, 0.22); }
}
.ad-qr-card__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  text-align: center;
}
.ad-qr-card__image-wrap {
  margin: 22px auto;
  width: 220px;
  padding: 14px;
  background: #fff;
  border-radius: var(--radius);
  /* QR itself stays fully static & undecorated per spec — no blur/glow/opacity on the code. */
}
.ad-qr-card__image { width: 100%; height: 100%; }
.ad-qr-card__hint {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}
.ad-qr-card__id {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-faint);
}
.ad-qr-card__id strong { color: var(--text-strong); font-size: 15px; letter-spacing: 0.02em; }

@media (max-width: 1024px) {
  .ad-hero__inner { grid-template-columns: 1fr; }
  .ad-hero__qr { max-width: 380px; margin: 0 auto; }
}
@media (max-width: 768px) {
  .ad-hero { padding-top: 120px; }
  .ad-hero__inner { text-align: left; }
}
@media (max-width: 430px) {
  .ad-hero__title { font-size: 52px; }
  .ad-hero__actions { flex-direction: column; }
  .ad-hero__actions .ad-btn { width: 100%; justify-content: center; }
  .ad-qr-card { padding: 24px; }
  .ad-qr-card__image-wrap { width: 180px; }
}

/* =========================================================================
   About
   ========================================================================= */
.ad-about { background: var(--bg-soft); }
.ad-about__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: start;
}
.ad-about__markers {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 8px;
}
.ad-marker {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  border: 1px solid var(--line);
}
.ad-marker--out { color: var(--text-muted); }
.ad-marker--in { color: var(--text-strong); border-color: var(--accent-border); background: var(--accent-soft); }
.ad-marker__sign {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  font-size: 14px;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.06);
}
.ad-marker--in .ad-marker__sign { background: var(--accent); color: var(--accent-ink); }

@media (max-width: 900px) {
  .ad-about__grid { grid-template-columns: 1fr; }
}

/* =========================================================================
   Benefits
   ========================================================================= */
.ad-benefits__grid {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.ad-benefit-card {
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ad-benefit-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-border);
  background: linear-gradient(160deg, rgba(46,211,198,0.06), var(--bg-elevated) 60%);
}
.ad-benefit-card__num {
  display: block;
  font-size: 34px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 18px;
}
.ad-benefit-card h3 { font-size: 19px; font-weight: 600; color: var(--text-strong); margin-bottom: 10px; }
.ad-benefit-card p { font-size: 14.5px; color: var(--text-muted); line-height: 1.6; }

@media (max-width: 768px) {
  .ad-benefits__grid { grid-template-columns: 1fr; }
}

/* =========================================================================
   Audience
   ========================================================================= */
.ad-audience { padding-top: 0; }
.ad-audience__photo {
  position: relative;
  height: 56vh;
  min-height: 380px;
  max-height: 620px;
  overflow: hidden;
}
.ad-audience__photo img { width: 100%; height: 100%; object-fit: cover; }
.ad-audience__photo-fade {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7,11,18,0.25) 0%, rgba(7,11,18,0.55) 70%, var(--bg) 100%);
}
.ad-audience .ad-container { margin-top: -90px; position: relative; z-index: 1; }
.ad-audience__list {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.ad-audience__list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  background: var(--bg);
  font-size: 15px;
  color: var(--text);
}
.ad-audience__num { color: var(--accent); font-weight: 600; font-size: 14px; flex-shrink: 0; }

@media (max-width: 768px) {
  .ad-audience .ad-container { margin-top: -50px; }
  .ad-audience__list { grid-template-columns: 1fr; }
}

/* =========================================================================
   Program timeline
   ========================================================================= */
.ad-timeline { position: relative; margin-top: 60px; }
.ad-timeline__rail {
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line);
  border-radius: 2px;
}
.ad-timeline__rail-fill {
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  border-radius: 2px;
  transition: height 120ms linear;
}
.ad-timeline__list { display: flex; flex-direction: column; gap: 48px; padding-left: 40px; }
.ad-timeline__item { position: relative; opacity: 0.45; transition: opacity var(--dur) var(--ease); }
.ad-timeline__item.is-active { opacity: 1; }
.ad-timeline__dot {
  position: absolute;
  left: -39px;
  top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--text-faint);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.ad-timeline__item.is-active .ad-timeline__dot {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.ad-timeline__time {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 10px;
}
.ad-timeline__body h3 { font-size: 21px; font-weight: 600; color: var(--text-strong); margin-bottom: 8px; }
.ad-timeline__body > p { font-size: 14.5px; color: var(--text-muted); margin-bottom: 14px; max-width: 640px; }
.ad-timeline__tag { font-size: 12px; letter-spacing: 0.1em; color: var(--text-faint); text-transform: uppercase; }

.ad-speaker-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.ad-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 8px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}
.ad-chip__avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--accent-soft), rgba(255,255,255,0.05));
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}
.ad-chip--tbd .ad-chip__avatar { color: var(--text-faint); background: rgba(255,255,255,0.05); }
.ad-chip--tbd strong { color: var(--text-muted); }
.ad-chip__text { display: flex; flex-direction: column; line-height: 1.3; }
.ad-chip__text strong { font-size: 13px; color: var(--text); font-weight: 600; }
.ad-chip__text small { font-size: 11.5px; color: var(--text-faint); }

@media (max-width: 640px) {
  .ad-timeline__list { padding-left: 30px; }
  .ad-timeline__dot { left: -29px; }
  .ad-timeline__rail { left: 4px; }
}

/* =========================================================================
   Speakers (standalone section)
   ========================================================================= */
.ad-speakers__grid {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.ad-speaker-card {
  padding: 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ad-speaker-card:hover { transform: translateY(-4px); border-color: var(--accent-border); }
.ad-speaker-card__photo {
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(46,211,198,0.16), rgba(255,255,255,0.03));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  overflow: hidden;
  transition: transform var(--dur) var(--ease);
}
.ad-speaker-card:hover .ad-speaker-card__photo { transform: scale(1.03); }
.ad-speaker-card__photo span {
  font-size: 44px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
}
.ad-speaker-card h3 { font-size: 17px; font-weight: 600; color: var(--text-strong); }
.ad-speaker-card__company { font-size: 13px; color: var(--accent); margin-top: 6px; }
.ad-speaker-card__role { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

@media (max-width: 900px) {
  .ad-speakers__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .ad-speakers__grid { grid-template-columns: 1fr; }
}

/* =========================================================================
   Red button — interactive game
   ========================================================================= */
.ad-redbutton {
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(255,93,93,0.08), transparent 70%), var(--bg-soft);
  text-align: center;
}
.ad-redbutton__inner { display: flex; flex-direction: column; align-items: center; }
.ad-redbutton__intro { display: flex; flex-direction: column; align-items: center; }
.ad-redbutton__clock {
  margin-top: 22px;
  font-size: clamp(48px, 9vw, 96px);
  font-weight: 300;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--danger);
  text-shadow: 0 0 40px rgba(255,93,93,0.35);
}
.ad-redbutton__clock-label {
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.ad-redbutton__stage { margin-top: 56px; display: flex; flex-direction: column; align-items: center; min-height: 220px; }
.ad-redbutton__btn {
  position: relative;
  width: 148px; height: 148px;
  border-radius: 50%;
  border: none;
  background: radial-gradient(circle at 35% 30%, #FF7A7A, #D63A3A 60%, #A32424 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 0 0 rgba(255,93,93,0.4), inset 0 -6px 14px rgba(0,0,0,0.25), inset 0 6px 10px rgba(255,255,255,0.18);
  animation: ad-red-pulse 2.6s ease-in-out infinite;
  transition: transform var(--dur-fast) var(--ease);
}
.ad-redbutton__btn:hover { transform: scale(1.04); }
.ad-redbutton__btn:active { transform: scale(0.96); }
.ad-redbutton__btn:disabled { cursor: default; animation-play-state: paused; }
.ad-redbutton__btn-ring {
  position: absolute; inset: -14px;
  border-radius: 50%;
  border: 1px solid rgba(255,93,93,0.35);
}
@keyframes ad-red-pulse {
  0%, 100% { box-shadow: 0 0 0 rgba(255,93,93,0.35), inset 0 -6px 14px rgba(0,0,0,0.25), inset 0 6px 10px rgba(255,255,255,0.18); }
  50% { box-shadow: 0 0 42px rgba(255,93,93,0.5), inset 0 -6px 14px rgba(0,0,0,0.25), inset 0 6px 10px rgba(255,255,255,0.18); }
}
.ad-redbutton__hint {
  margin-top: 22px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  transition: opacity var(--dur-fast) var(--ease);
}

.ad-redbutton__sequence {
  margin-top: 28px;
  min-height: 28px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
}
.ad-redbutton__sequence .ad-seq-line {
  animation: ad-seq-fade 480ms var(--ease);
}
.ad-redbutton__sequence .ad-seq-tags {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.ad-redbutton__sequence .ad-seq-tag {
  padding: 6px 14px;
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-pill);
  font-size: 12px;
  animation: ad-seq-fade 420ms var(--ease);
}
@keyframes ad-seq-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.ad-redbutton__reveal {
  margin-top: 20px;
  max-width: 640px;
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.ad-redbutton__reveal[hidden] { display: none; }
.ad-lede--wide { max-width: none; color: var(--text); font-size: 18px; }
.ad-redbutton__p { margin-top: 14px; font-size: 14.5px; color: var(--text-muted); line-height: 1.7; }
.ad-redbutton__question { margin-top: 24px; font-size: 18px; font-weight: 600; color: var(--text-strong); }
.ad-redbutton__window {
  margin: 28px auto 0;
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}
.ad-redbutton__window strong { color: var(--accent); font-size: 16px; font-variant-numeric: tabular-nums; }
.ad-redbutton__window span { font-size: 13px; color: var(--text-muted); }

/* =========================================================================
   Panel discussion
   ========================================================================= */
.ad-panel { background: linear-gradient(180deg, var(--bg-soft), var(--bg)); }
.ad-panel__diagram { margin-top: 64px; padding-top: 40px; }
.ad-panel__hub {
  position: relative;
  width: fit-content;
  margin: 0 auto 0;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.ad-panel__hub::after {
  content: '';
  position: absolute;
  left: 50%; top: 100%;
  width: 1px; height: 40px;
  background: linear-gradient(180deg, var(--accent-border), transparent);
}
.ad-panel__nodes {
  position: relative;
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ad-panel__nodes::before {
  content: '';
  position: absolute;
  left: 16.5%; right: 16.5%;
  top: 34px;
  height: 1px;
  background: var(--line);
  z-index: 0;
}
.ad-panel__node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 6px;
}
.ad-panel__node-avatar {
  width: 68px; height: 68px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  color: var(--text-faint);
  font-size: 22px;
  margin-bottom: 6px;
}
.ad-panel__node strong { font-size: 14.5px; color: var(--text-strong); }
.ad-panel__node small { font-size: 12px; color: var(--text-faint); max-width: 160px; }

.ad-panel__moderator {
  margin-top: 44px;
  display: flex;
  align-items: center;
  gap: 14px;
  justify-content: center;
}
.ad-panel__moderator-label { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-faint); }

.ad-panel__question {
  margin: 56px auto 0;
  max-width: 620px;
  text-align: center;
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}
.ad-panel__question p { margin-top: 14px; font-size: 20px; font-weight: 500; color: var(--text-strong); line-height: 1.4; }

.ad-panel__topics { margin-top: 70px; }
.ad-panel__topics-list {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.ad-panel__topics-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 22px;
  background: var(--bg);
  font-size: 14.5px;
  color: var(--text);
}
.ad-panel__topics-list span { color: var(--accent); font-weight: 600; font-size: 13px; flex-shrink: 0; }

@media (max-width: 768px) {
  .ad-panel__nodes { grid-template-columns: 1fr; gap: 26px; }
  .ad-panel__nodes::before { display: none; }
  .ad-panel__topics-list { grid-template-columns: 1fr; }
}

/* =========================================================================
   Location + video navigation + guest guide
   ========================================================================= */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.ad-location__grid {
  margin-top: 54px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
}
.ad-location__photo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.ad-location__photo img { width: 100%; height: 100%; object-fit: cover; }
.ad-location__info h3 { font-size: 26px; font-weight: 600; color: var(--text-strong); }
.ad-location__address { margin-top: 6px; font-size: 15px; color: var(--text-muted); }
.ad-location__facts { margin-top: 30px; display: flex; flex-direction: column; gap: 14px; }
.ad-location__facts > div { display: flex; justify-content: space-between; gap: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line-soft); }
.ad-location__facts dt { font-size: 13px; color: var(--text-faint); }
.ad-location__facts dd { margin: 0; font-size: 14px; color: var(--text); text-align: right; }
.ad-location__info .ad-btn { margin-top: 30px; }

.ad-video-nav {
  margin-top: 70px;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 40px;
  align-items: center;
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-elevated);
}
.ad-video-nav__text h3 { font-size: 20px; font-weight: 600; color: var(--text-strong); }
.ad-video-nav__text p { margin-top: 12px; font-size: 14.5px; color: var(--text-muted); line-height: 1.6; }
.ad-video-nav__preview {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  border: none;
  padding: 0;
  cursor: pointer;
  background: #000;
}
.ad-video-nav__preview img { width: 100%; height: 100%; object-fit: cover; opacity: 0.75; transition: opacity var(--dur-fast) var(--ease); }
.ad-video-nav__preview:hover img { opacity: 0.55; }
.ad-video-nav__badge {
  position: absolute; left: 14px; bottom: 14px;
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 12px; border-radius: var(--radius-pill);
  background: rgba(7,11,18,0.6); color: var(--text);
  backdrop-filter: blur(6px);
}
.ad-video-nav__play {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 64px; height: 64px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent);
  color: var(--accent-ink);
  animation: ad-play-pulse 3s ease-in-out infinite;
}
@keyframes ad-play-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(46,211,198,0.35); }
  50% { box-shadow: 0 0 0 14px rgba(46,211,198,0); }
}

.ad-guide { margin-top: 70px; }
.ad-guide__list {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: guide;
}
.ad-guide__list li {
  position: relative;
  padding: 24px 20px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
}
.ad-guide__list li:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 34px; right: -20px;
  width: 20px; height: 1px;
  background: var(--line);
}
.ad-guide__list span {
  display: block;
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
}

@media (max-width: 900px) {
  .ad-location__grid { grid-template-columns: 1fr; }
  .ad-video-nav { grid-template-columns: 1fr; padding: 26px; }
  .ad-guide__list { grid-template-columns: repeat(2, 1fr); }
  .ad-guide__list li:not(:last-child)::after { display: none; }
}
@media (max-width: 480px) {
  .ad-guide__list { grid-template-columns: 1fr; }
}

/* =========================================================================
   Modal (shared: video + registration)
   ========================================================================= */
.ad-modal {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.ad-modal[hidden] { display: none; }
.ad-modal__backdrop {
  position: absolute; inset: 0;
  background: rgba(4, 7, 12, 0.78);
  backdrop-filter: blur(6px);
  animation: ad-fade-in var(--dur-fast) var(--ease);
}
.ad-modal__panel {
  position: relative;
  z-index: 1;
  max-width: 560px;
  width: 100%;
  animation: ad-modal-in var(--dur-fast) var(--ease);
}
.ad-modal__panel--video { max-width: 900px; }
@keyframes ad-fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes ad-modal-in { from { opacity: 0; transform: translateY(14px) scale(0.98); } to { opacity: 1; transform: none; } }
.ad-modal__close {
  position: absolute; top: -46px; right: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.ad-modal__video {
  width: 100%;
  max-height: 80vh;
  border-radius: var(--radius-lg);
  background: #000;
  outline: none;
}

/* =========================================================================
   Partners / organizers
   ========================================================================= */
.ad-partners__organizer { text-align: center; display: flex; flex-direction: column; align-items: center; }
.ad-partners__organizer-logo { height: 40px; margin-top: 20px; filter: brightness(0) invert(1); }
.ad-partners__organizer-tag { margin-top: 14px; font-size: 14px; color: var(--text-muted); }

.ad-partners__list { margin-top: 80px; text-align: center; }
.ad-partners__grid {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.ad-partner-card {
  padding: 32px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ad-partner-card:hover { transform: translateY(-3px); border-color: var(--accent-border); }
.ad-partner-card__label { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-faint); }
.ad-partner-card img { height: 30px; filter: brightness(0) invert(1); opacity: 0.85; transition: opacity var(--dur-fast) var(--ease); }
.ad-partner-card:hover img { opacity: 1; }
.ad-partner-card__word { font-size: 15px; font-weight: 600; color: var(--text); text-align: center; }

@media (max-width: 700px) {
  .ad-partners__grid { grid-template-columns: 1fr; }
}

/* =========================================================================
   FAQ accordion
   ========================================================================= */
.ad-faq__inner { max-width: 760px; }
.ad-accordion { margin-top: 46px; display: flex; flex-direction: column; }
.ad-accordion__item { border-bottom: 1px solid var(--line-soft); }
.ad-accordion__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 4px;
  background: none;
  border: none;
  text-align: left;
  font-size: 16px;
  color: var(--text);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease);
}
.ad-accordion__item[data-open="1"] .ad-accordion__head { color: var(--accent-strong); }
.ad-accordion__icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  color: var(--text-muted);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.ad-accordion__item[data-open="1"] .ad-accordion__icon { transform: rotate(45deg); border-color: var(--accent-border); color: var(--accent); }
.ad-accordion__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease);
}
.ad-accordion__item[data-open="1"] .ad-accordion__body { grid-template-rows: 1fr; }
.ad-accordion__body-inner { overflow: hidden; }
.ad-accordion__body-inner p { padding: 0 4px 18px; font-size: 14.5px; color: var(--text-muted); line-height: 1.65; max-width: 620px; }
.ad-accordion__body-inner p:first-child { padding-top: 0; }

/* =========================================================================
   Register CTA section
   ========================================================================= */
.ad-register {
  background: radial-gradient(ellipse 70% 60% at 50% 100%, rgba(46,211,198,0.1), transparent 70%), var(--bg-soft);
  text-align: center;
}
.ad-register__inner { display: flex; flex-direction: column; align-items: center; }
.ad-register__title { text-align: center; }
.ad-register__meta {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  justify-content: center;
  font-size: 13px;
  color: var(--text-faint);
}

/* =========================================================================
   Registration form (modal)
   ========================================================================= */
.ad-reg-panel {
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--accent-border);
  background: var(--bg-panel);
}
.ad-reg-panel__title { margin-top: 16px; font-size: 28px; font-weight: 500; color: var(--text-strong); }
#ad-reg-form { margin-top: 28px; display: flex; flex-direction: column; gap: 16px; }
.ad-field { display: flex; flex-direction: column; gap: 7px; }
.ad-field label { font-size: 12.5px; color: var(--text-faint); }
.ad-field input {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color var(--dur-fast) var(--ease);
}
.ad-field input:focus { border-color: var(--accent-border); }
.ad-field input[aria-invalid="true"] { border-color: var(--danger); }
.ad-field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.ad-field__error { display: block; font-size: 12.5px; color: var(--danger); min-height: 0; }
.ad-field__error:empty { display: none; }
.ad-field__error--form {
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--danger-soft);
  min-height: 0;
}
.ad-field__error--form:empty { display: none; padding: 0; }

.ad-checkbox {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  cursor: pointer;
}
.ad-checkbox input { margin-top: 3px; accent-color: var(--accent); width: 16px; height: 16px; flex-shrink: 0; }
.ad-checkbox a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

.ad-reg-panel__note { margin-top: 6px; font-size: 12.5px; line-height: 1.5; color: var(--text-faint); }

.ad-reg-success { text-align: center; padding: 20px 0; }
.ad-reg-success__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 20px;
}
.ad-reg-success h3 { font-size: 24px; font-weight: 600; color: var(--text-strong); }
.ad-reg-success p { margin-top: 12px; font-size: 14.5px; color: var(--text-muted); line-height: 1.6; }
.ad-reg-success .ad-btn { margin-top: 26px; }

@media (max-width: 560px) {
  .ad-reg-panel { padding: 26px; }
  .ad-field-row { grid-template-columns: 1fr; }
  .ad-modal__close { top: -44px; }
}

/* =========================================================================
   Footer
   ========================================================================= */
.ad-footer { padding: 70px 0 0; border-top: 1px solid var(--line-soft); }
.ad-footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
}
.ad-footer__logo { font-size: 16px; font-weight: 700; letter-spacing: 0.1em; color: var(--text-strong); }
.ad-footer__brand p { margin-top: 12px; font-size: 13.5px; color: var(--text-faint); line-height: 1.6; max-width: 260px; }
.ad-footer__heading { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-faint); }
.ad-footer__social { margin-top: 18px; display: flex; gap: 12px; }
.ad-footer__social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ad-footer__social a:hover { color: var(--accent); border-color: var(--accent-border); }
.ad-footer__contact { margin-top: 18px; display: flex; flex-direction: column; gap: 3px; }
.ad-footer__contact:first-of-type { margin-top: 18px; }
.ad-footer__contact strong { font-size: 14px; color: var(--text); }
.ad-footer__contact small { font-size: 12.5px; color: var(--text-faint); }
.ad-footer__contact-links { margin-top: 4px; display: flex; gap: 14px; font-size: 12.5px; }
.ad-footer__contact-links a { color: var(--accent); }
.ad-footer__contact-links a:hover { color: var(--accent-strong); }

.ad-footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--text-faint);
}
.ad-footer__bottom a:hover { color: var(--text-muted); }

@media (max-width: 700px) {
  .ad-footer__grid { grid-template-columns: 1fr; gap: 32px; }
}