/* ============================================================
   BLACK BLOCKCHAIN SUMMIT — Landing Page Styles
   Design System + Component Styles
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Colors */
  --color-black: #000000;
  --color-dark: #0A0A0A;
  --color-dark-surface: #111111;
  --color-dark-card: #161616;
  --color-dark-border: #222222;
  --color-dark-elevated: #1A1A1A;

  --color-white: #FFFFFF;
  --color-light-bg: #EEF2F6;
  --color-light-surface: #F5F7FA;

  --color-accent: #E8A838;
  --color-accent-hover: #F0B84E;
  --color-accent-glow: rgba(232, 168, 56, 0.25);

  --color-text-primary: #FFFFFF;
  --color-text-secondary: rgba(255, 255, 255, 0.6);
  --color-text-faded: rgba(255, 255, 255, 0.4);
  --color-text-dark: #1A1A1A;
  --color-text-dark-secondary: #555555;

  --color-success: #22C55E;
  --color-urgent: #EF4444;

  /* Typography */
  --font-family: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.25rem;
  --font-size-6xl: 4rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Borders & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;

  /* Height of the fixed mobile CTA bar — footer reserves this so the
     bar never covers the last rows of footer content. */
  --sticky-cta-height: 80px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-black);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ---------- Utility Classes ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.section {
  padding: var(--space-5xl) 0;
}

.section--dark {
  background-color: var(--color-dark);
}

.section--black {
  background-color: var(--color-black);
}

.section--light {
  background-color: var(--color-light-bg);
  color: var(--color-text-dark);
}

.section--accent-bg {
  background: linear-gradient(135deg, #1a1200 0%, #2a1d00 50%, #1a1200 100%);
}

.text-center {
  text-align: center;
}

.text-accent {
  color: var(--color-accent);
}

.text-faded {
  color: var(--color-text-secondary);
}

.subtitle {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.15;
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }

.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-black);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 60px var(--color-accent-glow);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid var(--color-dark-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--large {
  padding: var(--space-lg) var(--space-3xl);
  font-size: var(--font-size-lg);
}

.btn--small {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--transition-base);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(0, 0, 0, 0.9);
  border-bottom: 1px solid var(--color-dark-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  height: 36px;
  width: auto;
  /* Logo art is two-tone (black + white); force solid white so the
     wordmark is legible on the dark nav. */
  filter: brightness(0) invert(1);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-white);
}

.nav__cta {
  margin-left: var(--space-md);
}

/* Hamburger toggle (mobile only) */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile dropdown menu */
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--space-xl) var(--space-xl);
  background: rgba(0, 0, 0, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-dark-border);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile-link {
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-dark-border);
  transition: color var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--color-white);
}

.nav__mobile-cta {
  margin-top: var(--space-md);
  width: 100%;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-5xl) 0 var(--space-4xl);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 30%, rgba(232, 168, 56, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(232, 168, 56, 0.04) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 80%, rgba(232, 168, 56, 0.04) 0%, transparent 50%);
  z-index: 1;
}

/* Animated blockchain network nodes */
.hero__bg canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-2xl);
}

.hero__badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse-dot 2s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero__date {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-accent);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.hero__venue {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: var(--space-lg) auto var(--space-2xl);
  line-height: 1.5;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

/* ---------- Countdown Timer ---------- */
.countdown {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.countdown__label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.countdown__units {
  display: flex;
  gap: var(--space-md);
}

.countdown__unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 72px;
}

.countdown__number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  min-width: 72px;
  text-align: center;
}

.countdown__text {
  font-size: var(--font-size-xs);
  color: var(--color-text-faded);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-xs);
}

.countdown__separator {
  font-size: var(--font-size-3xl);
  font-weight: 300;
  color: var(--color-text-faded);
  align-self: flex-start;
  padding-top: var(--space-md);
}

/* ---------- Proof Band ---------- */
.proof {
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--color-dark-border);
  border-bottom: 1px solid var(--color-dark-border);
  background: var(--color-dark);
}

.proof__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.proof__stat {
  text-align: center;
}

.proof__stat-number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}

.proof__stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-faded);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.proof__divider {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-faded);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-xl);
}

.proof__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3xl);
  flex-wrap: wrap;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}

.proof__logos:hover {
  opacity: 1;
}

.proof__logo {
  height: 28px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: opacity var(--transition-fast);
}

.proof__logo:hover {
  opacity: 0.7;
}

/* ---------- Pricing Section ---------- */
.pricing {
  padding: var(--space-5xl) 0;
  background: var(--color-black);
}

.pricing__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.pricing__header h2 {
  margin-bottom: var(--space-md);
}

.pricing__header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: 0 auto;
}

.pricing__urgency {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.pricing__urgency-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-full);
  color: var(--color-urgent);
  font-size: var(--font-size-sm);
  font-weight: 600;
  animation: urgency-pulse 3s ease infinite;
}

@keyframes urgency-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
  50% { box-shadow: 0 0 20px rgba(239, 68, 68, 0.15); }
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  align-items: stretch;
  max-width: 820px;
  margin: 0 auto;
}

.pricing__card {
  position: relative;
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.pricing__card:hover {
  transform: translateY(-4px);
  border-color: var(--color-dark-border);
  box-shadow: var(--shadow-lg);
}

.pricing__card--featured {
  border-color: var(--color-accent);
  background: linear-gradient(180deg, rgba(232, 168, 56, 0.06) 0%, var(--color-dark-surface) 40%);
  transform: scale(1.03);
  box-shadow: var(--shadow-glow);
}

.pricing__card--featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: 0 0 60px var(--color-accent-glow);
}

.pricing__popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-black);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing__tier-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.pricing__price-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.pricing__price {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1;
}

.pricing__price-original {
  font-size: var(--font-size-xl);
  color: var(--color-text-faded);
  text-decoration: line-through;
}

.pricing__price-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-faded);
  margin-bottom: var(--space-xl);
}

.pricing__features {
  flex: 1;
  margin-bottom: var(--space-xl);
}

.pricing__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.pricing__feature::before {
  content: '✓';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.pricing__card--featured .pricing__feature {
  color: var(--color-text-primary);
}

.pricing__cta {
  width: 100%;
}

/* ---------- Speakers Section ---------- */
.speakers {
  padding: var(--space-5xl) 0;
  background: var(--color-dark);
}

.speakers__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.speakers__header h2 {
  margin-bottom: var(--space-md);
}

.speakers__header .text-faded {
  font-size: var(--font-size-xl);
}

.speakers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.speaker-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
}

.speaker-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: all var(--transition-slow);
}

.speaker-card:hover .speaker-card__image {
  filter: grayscale(0%);
  transform: scale(1.05);
}

.speaker-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.3) 40%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-lg);
  transition: background var(--transition-base);
}

.speaker-card:hover .speaker-card__overlay {
  background: linear-gradient(0deg, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.4) 50%, transparent 100%);
}

.speaker-card__name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.speaker-card__role {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.3;
}

.speakers__more {
  text-align: center;
}

/* ---------- Why Attend Section ---------- */
.why-attend {
  padding: var(--space-5xl) 0;
  background: var(--color-black);
}

.why-attend__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
}

.why-attend__content h2 {
  margin-bottom: var(--space-lg);
}

.why-attend__content > p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2xl);
}

.why-attend__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.why-attend__item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

.why-attend__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(232, 168, 56, 0.1);
  border: 1px solid rgba(232, 168, 56, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.why-attend__item-content h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.why-attend__item-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.why-attend__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.why-attend__image {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/5;
}

.why-attend__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.why-attend__image:hover img {
  transform: scale(1.05);
}

.why-attend__image:first-child {
  grid-row: span 2;
  aspect-ratio: auto;
}

/* ---------- Agenda Section ---------- */
.agenda {
  padding: var(--space-5xl) 0;
  background: var(--color-dark);
}

.agenda__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.agenda__header h2 {
  margin-bottom: var(--space-md);
}

.agenda__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.agenda-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.agenda-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.agenda-card__number {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: rgba(232, 168, 56, 0.15);
  margin-bottom: var(--space-md);
  line-height: 1;
}

.agenda-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.agenda-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.agenda__footer {
  text-align: center;
}

.agenda__footer p {
  color: var(--color-text-faded);
  font-size: var(--font-size-sm);
  margin-top: var(--space-md);
}

/* ---------- Experience / Video Section ---------- */
.experience {
  padding: var(--space-5xl) 0;
  background: var(--color-black);
  position: relative;
  overflow: hidden;
}

.experience::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 40%, rgba(232, 168, 56, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.experience .container {
  position: relative;
  z-index: 1;
}

.experience__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.experience__header h2 {
  margin-bottom: var(--space-md);
}

.experience__header .text-faded {
  font-size: var(--font-size-lg);
}

.experience__video {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-dark-border);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.video-facade {
  position: absolute;
  inset: 0;
  cursor: pointer;
  border: none;
  background: var(--color-dark-surface);
}

.video-facade__poster {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
  transition: filter var(--transition-base), transform var(--transition-slow);
}

.video-facade:hover .video-facade__poster,
.video-facade:focus-visible .video-facade__poster {
  filter: brightness(0.85);
  transform: scale(1.03);
}

.video-facade__play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), background var(--transition-base);
  pointer-events: none;
}

.video-facade:hover .video-facade__play,
.video-facade:focus-visible .video-facade__play {
  transform: translate(-50%, -50%) scale(1.08);
  background: var(--color-accent-hover);
}

.video-facade__play svg {
  width: 32px;
  height: 32px;
  margin-left: 4px;
  fill: var(--color-black);
}

.video-facade__label {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  white-space: nowrap;
  pointer-events: none;
}

.video-facade:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.experience__player {
  width: 100%;
  height: 100%;
  display: block;
  border: 0;
}

.experience__more {
  text-align: center;
  margin-top: var(--space-2xl);
}

@media (max-width: 768px) {
  .video-facade__play {
    width: 60px;
    height: 60px;
  }

  .video-facade__play svg {
    width: 24px;
    height: 24px;
  }
}

/* ---------- Mid-page Urgency CTA ---------- */
.urgency-cta {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, #1a1200 0%, #0A0A0A 50%, #1a1200 100%);
  border-top: 1px solid rgba(232, 168, 56, 0.15);
  border-bottom: 1px solid rgba(232, 168, 56, 0.15);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.urgency-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(232, 168, 56, 0.06) 0%, transparent 70%);
}

.urgency-cta__content {
  position: relative;
  z-index: 1;
}

.urgency-cta h2 {
  margin-bottom: var(--space-md);
}

.urgency-cta p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2xl);
}

/* ---------- Sponsors Section ---------- */
.sponsors {
  padding: var(--space-5xl) 0;
  background: var(--color-black);
}

.sponsors__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.sponsors__header h2 {
  margin-bottom: var(--space-md);
}

.sponsors__tier-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.sponsors__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2xl) var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.sponsors__grid--headline {
  gap: var(--space-3xl) var(--space-4xl);
  margin-bottom: var(--space-3xl);
}

.sponsor-logo {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.6;
  transition: all var(--transition-base);
}

.sponsor-logo:hover {
  opacity: 1;
}

.sponsor-logo--large {
  height: 40px;
}

.sponsors__cta {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ---------- FAQ Section ---------- */
.faq {
  padding: var(--space-5xl) 0;
  background: var(--color-dark);
}

.faq__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.faq__header h2 {
  margin-bottom: var(--space-md);
}

.faq__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

/* Grid items default to min-width:auto, so the contact card's email address
   sets a floor the column can't shrink below and the page gains a horizontal
   scrollbar on narrow phones. Let the column shrink and the address wrap. */
.faq__grid > * {
  min-width: 0;
}

.faq__contact-item {
  overflow-wrap: anywhere;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.faq-item {
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.faq-item.active {
  border-color: var(--color-accent);
}

.faq-item__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-dark-surface);
  text-align: left;
  transition: color var(--transition-fast);
}

.faq-item__question:hover {
  color: var(--color-accent);
}

.faq-item__icon {
  font-size: var(--font-size-xl);
  color: var(--color-text-faded);
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-md);
}

.faq-item.active .faq-item__icon {
  transform: rotate(45deg);
  color: var(--color-accent);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item__answer-inner {
  padding: 0 var(--space-xl) var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.faq__contact {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  height: fit-content;
  position: sticky;
  top: 100px;
}

.faq__contact h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
}

.faq__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.faq__contact-item strong {
  display: block;
  color: var(--color-white);
  margin-bottom: var(--space-xs);
}

.faq__contact-icon {
  flex-shrink: 0;
  font-size: 1.25rem;
  margin-top: 2px;
}

/* ---------- Final CTA Section ---------- */
.final-cta {
  padding: var(--space-5xl) 0;
  text-align: center;
  background: var(--color-black);
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(232, 168, 56, 0.08) 0%, transparent 60%);
}

.final-cta__content {
  position: relative;
  z-index: 1;
}

.final-cta h2 {
  margin-bottom: var(--space-md);
}

.final-cta p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta .hashtag {
  display: block;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-top: var(--space-3xl);
  letter-spacing: 0.02em;
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--color-dark-border);
  background: var(--color-dark);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer__brand-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-lg);
  line-height: 1.6;
  max-width: 320px;
}

.footer__logo {
  height: 32px;
  width: auto;
  /* Two-tone logo art — force solid white for legibility on dark footer. */
  filter: brightness(0) invert(1);
}

.footer__heading {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-accent);
}

.footer__social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-dark-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-dark-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-faded);
}

/* ---------- Sticky Mobile CTA ---------- */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  padding: var(--space-md) var(--space-xl);
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--color-dark-border);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.sticky-cta.visible {
  transform: translateY(0);
}

.sticky-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.sticky-cta__text {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.sticky-cta__text span {
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive Design ---------- */
@media (max-width: 1024px) {
  .pricing__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .pricing__card--featured {
    transform: none;
    order: -1;
  }

  .pricing__card--featured:hover {
    transform: translateY(-4px);
  }

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

  .why-attend__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .why-attend__images {
    order: -1;
  }

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

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

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-6xl: 3rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }

  /* Every section sets its own padding, so listing them here keeps the
     vertical rhythm uniform on mobile. Without this, only the sections
     carrying the .section class shrink and the rest stay at desktop size. */
  .section,
  .pricing,
  .speakers,
  .experience,
  .why-attend,
  .agenda,
  .sponsors,
  .faq,
  .final-cta {
    padding: var(--space-3xl) 0;
  }

  /* Tighter bands keep their proportion to the full sections. */
  .proof {
    padding: var(--space-xl) 0;
  }

  .urgency-cta {
    padding: var(--space-2xl) 0;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    /* space-3xl matches the other sections; +60px clears the fixed nav. */
    padding: calc(var(--space-3xl) + 60px) 0 var(--space-3xl);
  }

  .hero__actions {
    flex-direction: column;
  }

  .countdown__units {
    gap: var(--space-sm);
  }

  .countdown__number {
    font-size: var(--font-size-2xl);
    min-width: 56px;
    padding: var(--space-sm) var(--space-md);
  }

  .countdown__separator {
    font-size: var(--font-size-xl);
  }

  .proof__stats {
    gap: var(--space-xl);
  }

  .proof__stat-number {
    font-size: var(--font-size-2xl);
  }

  .proof__logos {
    gap: var(--space-xl);
  }

  .proof__logo {
    height: 20px;
  }

  .speakers__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

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

  .sponsors__grid {
    gap: var(--space-xl) var(--space-2xl);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  /* Show sticky CTA on mobile */
  .sticky-cta {
    display: block;
  }

  /* Reserve room so the fixed bar doesn't sit on top of footer content. */
  .footer {
    padding-bottom: calc(var(--space-xl) + var(--sticky-cta-height));
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-6xl: 2.25rem;
    --font-size-4xl: 1.75rem;
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .proof__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }

  .container {
    padding: 0 var(--space-md);
  }

  /* Long button labels can't fit on one line this narrow, and the base
     rule sets nowrap, which pushed them past the viewport. */
  .btn {
    white-space: normal;
    padding: var(--space-md) var(--space-xl);
    max-width: 100%;
  }

  /* Four units + separators no longer fit at the desktop width/gap.
     The unit and the number each carry their own 72px floor — both have
     to come down or the row stays 330px wide. */
  .countdown__units {
    gap: var(--space-xs);
  }

  .countdown__unit {
    min-width: 0;
  }

  .countdown__number {
    font-size: var(--font-size-xl);
    min-width: 44px;
    padding: var(--space-sm);
  }

  /* Narrow phones leave the speaker cards ~140px wide. At the desktop
     padding and type sizes, long roles wrap far enough to spill past the
     card, so tighten both here. */
  .speaker-card__overlay {
    padding: var(--space-md);
  }

  .speaker-card__name {
    font-size: var(--font-size-base);
  }

  .speaker-card__role {
    font-size: var(--font-size-xs);
  }
}