/* TechVerse 2026 - Custom Styles */

:root {
  --primary-blue: #3b82f6;
  --primary-purple: #8b5cf6;
  --secondary-blue: #60a5fa;
  --secondary-purple: #a78bfa;
  --dark-bg: #0f172a;
  --dark-card: #1e293b;
  --dark-border: #334155;
  --text-primary: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(to bottom, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-blue);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-blue);
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--secondary-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Navigation */
.navbar {
  background: transparent;
  transition: all 0.3s ease;
  padding: 1.5rem 0;
  z-index: 999;
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  padding: 1rem 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar-logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.5rem;
  color: white;
}

.navbar-title {
  display: flex;
  flex-direction: column;
}

.navbar-title h1 {
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0;
}

.navbar-title span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.navbar-nav .nav-link {
  color: var(--text-secondary) !important;
  transition: color 0.3s ease;
  padding: 0.5rem 1rem !important;
}

.navbar-nav .nav-link:hover {
  color: var(--text-primary) !important;
}

.btn-gradient {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border: none;
  color: white;
  padding: 0.625rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
  color: white;
}

/* Hero Section */
.hero-section {
  padding: 8rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.15), transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.15), transparent 50%);
  pointer-events: none;
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.hero-section .lead {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

/* City Cards */
.city-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  padding: 2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  height: 100%;
}

.city-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-5px);
}

.city-card.active {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border-color: var(--secondary-blue);
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.3);
}

.city-card h3 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.city-card .city-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.city-card.active .city-info {
  color: white;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: rgba(30, 41, 59, 0.3);
}

.section-title {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
  text-align: center;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 4rem;
}

/* Cards */
.custom-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  padding: 2rem;
  height: 100%;
  transition: all 0.3s ease;
}

.custom-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-5px);
}

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

.stat-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.stat-icon.blue {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  color: var(--secondary-blue);
}

.stat-icon.purple {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2) 0%, rgba(219, 39, 119, 0.2) 100%);
  color: var(--secondary-purple);
}

.stat-icon.pink {
  background: linear-gradient(135deg, rgba(219, 39, 119, 0.2) 0%, rgba(249, 115, 22, 0.2) 100%);
  color: #f472b6;
}

.stat-icon.orange {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.2) 0%, rgba(239, 68, 68, 0.2) 100%);
  color: #fb923c;
}

.stat-number {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-muted);
}

/* Focus Area Cards */
.focus-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  padding: 2.5rem;
  height: 100%;
  transition: all 0.3s ease;
}

.focus-card:hover {
  border-color: rgba(59, 130, 246, 0.5);
}

.focus-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-blue);
  font-size: 3rem;
}

.focus-card h3 {
  text-align: center;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.focus-card p {
  text-align: center;
  color: var(--text-muted);
}

/* Highlight Cards */
.highlight-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.5rem;
  height: 100%;
  transition: all 0.3s ease;
}

.highlight-card:hover {
  border-color: rgba(139, 92, 246, 0.5);
}

.highlight-icon {
  color: var(--secondary-purple);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.highlight-card h5 {
  margin-bottom: 0.75rem;
}

.highlight-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* Tabs */
.custom-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.tab-btn {
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--dark-border);
  color: var(--text-secondary);
  padding: 0.75rem 2rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  font-weight: 500;
}

.tab-btn:hover {
  border-color: var(--primary-blue);
  color: var(--text-primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border-color: var(--secondary-blue);
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Speaker Cards */
.speaker-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  height: 100%;
}

.speaker-card:hover {
  border-color: rgba(59, 130, 246, 0.5);
  transform: translateY(-5px);
}

.speaker-image {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.speaker-info {
  padding: 1.5rem;
}

.speaker-name {
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.speaker-title {
  color: var(--secondary-blue);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.speaker-company {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.speaker-topic {
  background: rgba(139, 92, 246, 0.2);
  color: var(--secondary-purple);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  display: inline-block;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Agenda Cards */
.agenda-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.agenda-card:hover {
  border-color: rgba(59, 130, 246, 0.5);
}

.agenda-time {
  background: rgba(59, 130, 246, 0.2);
  color: var(--secondary-blue);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 1rem;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.agenda-title {
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.agenda-description {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.agenda-speaker {
  color: var(--secondary-purple);
  font-size: 0.9rem;
}

/* Sponsor Section */
.sponsor-tier {
  margin-bottom: 4rem;
}

.tier-badge {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 2rem;
}

.tier-badge.platinum {
  background: linear-gradient(135deg, #e5e7eb 0%, #f3f4f6 100%);
  color: #1f2937;
}

.tier-badge.gold {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: white;
}

.tier-badge.silver {
  background: linear-gradient(135deg, #9ca3af 0%, #6b7280 100%);
  color: #1f2937;
}

.tier-badge.bronze {
  background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
  color: white;
}

.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.sponsor-logo {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  transition: all 0.3s ease;
}

.sponsor-logo:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.sponsor-logo img {
  max-width: 100%;
  max-height: 80px;
}

/* Who Should Attend */
.attend-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  align-items: start;
  gap: 1rem;
  height: 100%;
}

.attend-icon {
  color: var(--secondary-blue);
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.attend-card p {
  color: var(--text-secondary);
  margin: 0;
}

/* Industrial Verticals */
.vertical-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.5rem;
  height: 100%;
  transition: all 0.3s ease;
}

.vertical-card:hover {
  border-color: rgba(139, 92, 246, 0.5);
}

.vertical-icon {
  color: var(--secondary-purple);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.vertical-card h5 {
  margin-bottom: 0.75rem;
}

.vertical-card p {
  color: var(--text-muted);
  margin: 0;
}

/* Partner Cards */
.partner-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  padding: 1.5rem;
  height: 100%;
}

.partner-card h5 {
  color: var(--secondary-blue);
  margin-bottom: 0.75rem;
}

.partner-card p {
  color: var(--text-muted);
  margin: 0;
}

/* Contact Cards */
.contact-card {
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--dark-border);
  border-radius: 16px;
  padding: 2rem;
  height: 100%;
}

.contact-card h4 {
  color: var(--secondary-blue);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--dark-border);
}

.contact-person {
  margin-bottom: 1.5rem;
}

.contact-person:last-child {
  margin-bottom: 0;
}

.contact-name {
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.contact-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.contact-info svg {
  flex-shrink: 0;
}

.contact-info a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-info a:hover {
  color: var(--secondary-blue);
}

/* Footer */
.footer {
  background: rgba(15, 23, 42, 1);
  border-top: 1px solid var(--dark-border);
  padding: 3rem 0;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.5rem;
}

.footer-title {
  font-size: 1.5rem;
  font-weight: bold;
}

.footer p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.footer-copyright {
  color: #64748b;
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .custom-tabs {
    flex-direction: column;
  }

  .tab-btn {
    width: 100%;
  }

  .sponsor-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}

@media (max-width: 576px) {
  .hero-section {
    padding: 6rem 0 3rem;
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  .section {
    padding: 3rem 0;
  }
}