/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* === CUSTOM PROPERTIES === */
:root {
  --color-bg: #0a0a0a;
  --color-bg-alt: #141414;
  --color-text: #f5f5f5;
  --color-text-muted: #a0a0a0;
  --color-accent: #ff6b35;
  --color-accent-hover: #ff8c5a;
  --color-highlight: #ffd700;
  --color-border: #2a2a2a;
  --color-card-bg: #1a1a1a;
  --font-body: 'Inter', system-ui, sans-serif;
  --section-padding: 80px 0;
  --container-width: 1200px;
  --container-padding: 0 24px;
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent-hover); }
img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}
.section { padding: var(--section-padding); }
.section--alt { background: var(--color-bg-alt); }

.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-align: center;
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.4);
}
.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}
.btn--secondary:hover {
  border-color: var(--color-text);
  transform: translateY(-2px);
}

.heading-xl { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.1; }
.heading-lg { font-size: clamp(1.5rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.2; }
.heading-md { font-size: clamp(1.25rem, 2vw, 1.75rem); font-weight: 600; line-height: 1.3; }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

.section__header {
  text-align: center;
  margin-bottom: 48px;
}
.section__header p {
  color: var(--color-text-muted);
  margin-top: 12px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* === URGENCY BAR === */
.urgency-bar {
  background: var(--color-highlight);
  color: #000;
  text-align: center;
  padding: 8px 0;
  font-size: 0.875rem;
  font-weight: 600;
  position: relative;
  z-index: 1001;
}

/* === NAV === */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  transition: box-shadow var(--transition-normal);
}
.nav--scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.5); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.nav__logo:hover { color: var(--color-accent); }

.nav__links { display: flex; gap: 24px; }
.nav__links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.nav__links a:hover { color: var(--color-text); }

.nav__cta { padding: 10px 24px; font-size: 0.875rem; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}

@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    gap: 16px;
  }
  .nav__links--open { display: flex; }
  .nav__cta { display: none; }
}

/* === HERO === */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}
.hero__inner { max-width: 900px; margin: 0 auto; }
.hero__title { margin-bottom: 24px; }
.hero__meta { font-size: 1.1rem; margin-bottom: 40px; }
.hero__ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.btn--lg { padding: 20px 40px; font-size: 1.125rem; }
.hero__logos { margin-top: 20px; }
.hero__logos-label { font-size: 0.85rem; margin-bottom: 16px; }
.hero__logos-row {
  display: flex;
  gap: 32px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  opacity: 0.6;
}
.hero__logo-placeholder {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-muted);
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

@media (max-width: 768px) {
  .hero { padding: 60px 0 50px; }
  .hero__ctas { flex-direction: column; align-items: center; }
  .btn--lg { width: 100%; max-width: 320px; }
}

/* === CARDS GRID === */
.cards { display: grid; gap: 24px; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }
.cards--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .cards--3, .cards--4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 32px;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}
.card__icon { font-size: 2.5rem; margin-bottom: 16px; }
.card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.card__tag--designer { background: rgba(99, 102, 241, 0.2); color: #818cf8; }
.card__tag--business { background: rgba(34, 197, 94, 0.2); color: #4ade80; }
.card__tag--all { background: rgba(255, 107, 53, 0.2); color: var(--color-accent); }
.card h3 { margin-bottom: 12px; }
.card p { color: var(--color-text-muted); line-height: 1.7; }

/* === SPEAKERS === */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 768px) {
  .speakers-grid { grid-template-columns: repeat(2, 1fr); }
}
.speaker-card { text-align: center; padding: 24px 16px; }
.speaker-card--hidden { display: none; }
.speakers-grid--expanded .speaker-card--hidden { display: block; }
.speaker-card__img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background-size: cover;
  background-position: center;
}
.speaker-card__name { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.speaker-card__role { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 8px; }
.speaker-card__linkedin {
  display: inline-block;
  width: 28px;
  height: 28px;
  line-height: 28px;
  border-radius: 4px;
  background: var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
}
.speaker-card__linkedin:hover { background: #0077b5; color: #fff; }

/* === INTERSTITIAL CTA === */
.interstitial-cta {
  margin-top: 48px;
  padding: 32px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.interstitial-cta p { font-size: 1.25rem; font-weight: 600; }

/* === TABS === */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  padding: 12px 24px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-muted);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.tab:hover { border-color: var(--color-text-muted); }
.tab--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* === FILTERS === */
.filters { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; }
.filter {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter:hover { border-color: var(--color-text-muted); color: var(--color-text); }
.filter--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* === AGENDA === */
.agenda-day { display: none; }
.agenda-day--active { display: block; }

.session {
  display: flex;
  gap: 32px;
  padding: 32px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 16px;
  background: var(--color-card-bg);
  transition: opacity var(--transition-normal);
}
.session--hidden { display: none; }

.session__time {
  min-width: 120px;
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.95rem;
}

.session__track {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}
.session__track--ai { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }
.session__track--cyber { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.session__track--ecommerce { background: rgba(34, 197, 94, 0.2); color: #4ade80; }
.session__track--hr { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.session__track--banking { background: rgba(234, 179, 8, 0.2); color: #facc15; }

.session__takeaways { margin: 12px 0; color: var(--color-text-muted); }
.session__takeaways ul { list-style: none; padding: 0; margin-top: 8px; }
.session__takeaways li {
  padding-left: 20px;
  position: relative;
  margin-bottom: 4px;
}
.session__takeaways li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.session__speakers { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 8px; }
.session__level {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 2px 8px;
  border-radius: 4px;
  margin-top: 8px;
}

@media (max-width: 768px) {
  .session { flex-direction: column; gap: 8px; }
  .session__time { min-width: auto; }
  .tabs { flex-direction: column; }
}

/* === PRICING === */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
@media (max-width: 768px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
}
.pricing-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px;
  position: relative;
  text-align: center;
}
.pricing-card--featured {
  border-color: var(--color-accent);
  transform: scale(1.05);
  box-shadow: 0 8px 32px rgba(255, 107, 53, 0.15);
}
@media (max-width: 768px) {
  .pricing-card--featured { transform: none; }
}
.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  text-transform: uppercase;
}
.pricing-card__name { font-size: 1.25rem; font-weight: 700; margin-bottom: 8px; }
.pricing-card__amount { font-size: 2.5rem; font-weight: 800; }
.pricing-card__period { display: block; font-size: 0.85rem; color: var(--color-text-muted); margin-top: 4px; }
.pricing-card__saving { color: var(--color-highlight); font-size: 0.85rem; font-weight: 600; margin-top: 8px; }
.pricing-card__features { list-style: none; padding: 0; margin: 24px 0; text-align: left; }
.pricing-card__feature {
  padding: 8px 0;
  padding-left: 28px;
  position: relative;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--color-border);
}
.pricing-card__feature:last-child { border-bottom: none; }
.pricing-card__feature::before { position: absolute; left: 0; top: 8px; }
.pricing-card__feature--included::before { content: '\2713'; color: #4ade80; }
.pricing-card__feature--excluded { color: var(--color-text-muted); opacity: 0.5; }
.pricing-card__feature--excluded::before { content: '\2014'; color: var(--color-text-muted); }
.pricing-card__cta { width: 100%; display: block; }

.trust-badges { display: flex; justify-content: center; gap: 32px; margin-top: 40px; flex-wrap: wrap; }
.trust-badge { font-size: 0.9rem; color: var(--color-text-muted); font-weight: 500; }

/* === COUNCIL === */
.council-grid { display: flex; justify-content: center; gap: 32px; flex-wrap: wrap; }
.council-member { text-align: center; }
.council-member__img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 8px;
  background-size: cover;
}
.council-member__name { font-size: 0.85rem; font-weight: 600; margin-bottom: 4px; }

/* === LOGO WALL === */
.logo-wall {
  display: flex;
  justify-content: center;
  gap: 32px;
  align-items: center;
  flex-wrap: wrap;
  opacity: 0.6;
}
.logo-wall__item {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-muted);
  padding: 12px 24px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

/* === FOUNDER QUOTE === */
.founder-quote {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  font-size: 1.25rem;
  font-style: italic;
  line-height: 1.8;
  color: var(--color-text);
}
.founder-quote cite {
  display: block;
  margin-top: 16px;
  font-size: 0.9rem;
  font-style: normal;
  color: var(--color-text-muted);
}

/* === FAQ === */
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-group__title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  margin-top: 32px;
  margin-bottom: 16px;
}
.faq-group__title:first-of-type { margin-top: 0; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 8px;
  overflow: hidden;
}
.faq-item__question {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item__question::-webkit-details-marker { display: none; }
.faq-item__question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] .faq-item__question::after { content: '\2212'; }
.faq-item__answer {
  padding: 0 20px 16px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* === FINAL CTA === */
.final-cta { padding: 100px 0; }

/* === FOOTER === */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
}
.footer__inner { text-align: center; }
.footer__links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.footer__links a { color: var(--color-text-muted); font-size: 0.85rem; }
.footer__links a:hover { color: var(--color-text); }
.footer__social {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}
.footer__social a {
  display: inline-block;
  width: 36px;
  height: 36px;
  line-height: 36px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
}
.footer__social a:hover { background: var(--color-accent); color: #fff; }
.footer__copy { font-size: 0.8rem; color: var(--color-text-muted); }

/* === ANIMATIONS === */
@media (prefers-reduced-motion: no-preference) {
  .section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .section--visible {
    opacity: 1;
    transform: translateY(0);
  }
}