:root {
  --navy: #0f172a;
  --navy-dark: #0a1120;
  --cyan: #38bdf8;
  --cyan-dark: #0891b2;
  --amber: #f97316;
  --white: #ffffff;
  --text-muted: #94a3b8;
  --card: #111b2e;
  --border: rgba(56, 189, 248, 0.25);
  --gradient: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(8, 17, 32, 0.95) 40%, rgba(17, 27, 46, 0.9) 100%);
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--navy-dark);
  color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Sora', sans-serif;
  color: var(--white);
}

.navbar {
  background: rgba(8, 17, 32, 0.9);
  border-bottom: 1px solid rgba(56, 189, 248, 0.2);
  position: sticky;
  top: 0;
  z-index: 20;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--white);
}

.navbar-brand span {
  color: var(--cyan);
}

.navbar-link {
  color: var(--text-muted);
  font-weight: 600;
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--cyan);
}

.hero-summit {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: url('https://images.pexels.com/photos/3184306/pexels-photo-3184306.jpeg?auto=compress&cs=tinysrgb&w=1920') center/cover no-repeat;
}

.hero-summit::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(8, 17, 32, 0.8);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero-title {
  font-size: clamp(2.5rem, 4vw, 3.6rem);
  margin-bottom: 16px;
}

.hero-description {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.1rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(249, 115, 22, 0.5);
  color: var(--amber);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
}

.hero-stats {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.stat-card {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
}

.stat-card h3 {
  color: var(--cyan);
  font-size: 2rem;
  margin-bottom: 6px;
}

.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-badge {
  color: var(--amber);
  letter-spacing: 0.25em;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(2.2rem, 3vw, 2.8rem);
  margin: 16px 0 10px;
}

.section-subtitle {
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto;
}

.cards-grid,
.agenda-grid,
.speaker-grid,
.resource-grid,
.ticket-grid,
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card,
.agenda-card,
.speaker-card,
.resource-card,
.ticket-card,
.faq-card {
  background: var(--card);
  border-radius: 18px;
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.agenda-card h3,
.ticket-card h3 {
  color: var(--cyan);
}

.speaker-card img {
  width: 100%;
  border-radius: 16px;
  margin-bottom: 16px;
  height: 220px;
  object-fit: cover;
}

.timeline {
  border-left: 2px solid rgba(56, 189, 248, 0.4);
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.timeline-step {
  position: relative;
}

.timeline-step::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber);
}

.table-scroll {
  overflow-x: auto;
}

.ticket-table {
  width: 100%;
  border-spacing: 0;
  color: var(--white);
}

.ticket-table th,
.ticket-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
}

.form-card {
  background: var(--card);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid var(--border);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

input,
textarea,
select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(56, 189, 248, 0.3);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-family: inherit;
}

textarea {
  resize: vertical;
}

.cta-section {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(56, 189, 248, 0.15));
  padding: 80px 0;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--cyan-dark));
  border: none;
  color: #0f172a;
  font-weight: 700;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.footer {
  background: #070c16;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.footer a {
  color: var(--text-muted);
}

.back-to-top {
  background: var(--cyan);
  color: #0f172a;
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

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

  .hero-stats {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}