@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');
@import url('https://cdn.jsdelivr.net/npm/remixicon@2.5.0/fonts/remixicon.css');

:root {
  --nexus-void: #0A0E27;
  --nexus-deep: #121736;
  --nexus-surface: #1A2148;
  --nexus-violet: #7B2FF7;
  --nexus-violet-light: #A66BFF;
  --nexus-cyan: #00E5D4;
  --nexus-magenta: #FF3E9A;
  --nexus-amber: #FFB000;
  --nexus-text-light: #E8EBFF;
  --nexus-text-muted: #9BA3C9;
  --nexus-border: rgba(123, 47, 247, 0.25);
  --nexus-glow: 0 0 20px rgba(123, 47, 247, 0.5);
  --nexus-glow-cyan: 0 0 20px rgba(0, 229, 212, 0.4);
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: #F7F8FC;
  color: #1A1F3A;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--nexus-void);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--nexus-violet), var(--nexus-cyan));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--nexus-magenta), var(--nexus-violet));
}

/* Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--nexus-void);
  border-bottom: 1px solid var(--nexus-border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
}

.site-header .logo-text {
  background: linear-gradient(90deg, var(--nexus-cyan), var(--nexus-violet-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-link {
  position: relative;
  color: var(--nexus-text-light);
  font-weight: 500;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--nexus-cyan), var(--nexus-violet));
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: var(--nexus-cyan);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.active {
  color: var(--nexus-cyan);
}

.nav-link.active::after {
  width: 100%;
}

/* Mobile Menu */
.mobile-menu {
  background-color: var(--nexus-deep);
  border-top: 1px solid var(--nexus-border);
}

.mobile-menu a {
  color: var(--nexus-text-light);
  border-bottom: 1px solid rgba(123, 47, 247, 0.15);
}

.mobile-menu a:hover {
  color: var(--nexus-cyan);
  background-color: rgba(123, 47, 247, 0.1);
}

.mobile-menu-toggle {
  color: var(--nexus-text-light);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--nexus-violet), var(--nexus-magenta));
  color: #ffffff;
  font-weight: 600;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  border: none;
  box-shadow: 0 4px 20px rgba(123, 47, 247, 0.4);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(123, 47, 247, 0.6);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--nexus-cyan);
  font-weight: 600;
  padding: 0.8rem 1.9rem;
  border-radius: 8px;
  border: 2px solid var(--nexus-cyan);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-secondary:hover {
  background-color: var(--nexus-cyan);
  color: var(--nexus-void);
  box-shadow: var(--nexus-glow-cyan);
}

.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: #1A1F3A;
  font-weight: 600;
  padding: 0.8rem 1.9rem;
  border-radius: 8px;
  border: 2px solid #1A1F3A;
  transition: var(--transition-smooth);
}

.btn-outline-dark:hover {
  background-color: #1A1F3A;
  color: #ffffff;
}

/* Cards */
.nexus-card {
  background-color: #ffffff;
  border-radius: 14px;
  border: 1px solid #E5E7F5;
  box-shadow: 0 4px 16px rgba(20, 20, 60, 0.06);
  transition: var(--transition-smooth);
}

.nexus-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(123, 47, 247, 0.18);
  border-color: var(--nexus-violet-light);
}

.nexus-card-dark {
  background-color: var(--nexus-surface);
  border-radius: 14px;
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text-light);
  transition: var(--transition-smooth);
}

.nexus-card-dark:hover {
  border-color: var(--nexus-cyan);
  box-shadow: var(--nexus-glow-cyan);
}

.icon-badge {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(123, 47, 247, 0.15), rgba(0, 229, 212, 0.15));
  color: var(--nexus-violet);
  font-size: 1.5rem;
}

/* Accordion */
.accordion-item {
  border: 1px solid #E5E7F5;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 0.75rem;
  transition: var(--transition-smooth);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  cursor: pointer;
  background-color: #ffffff;
  font-weight: 600;
  color: #1A1F3A;
  transition: var(--transition-smooth);
}

.accordion-header:hover {
  background-color: #F5F3FF;
}

.accordion-header i {
  color: var(--nexus-violet);
  transition: transform 0.3s ease;
}

.accordion-header.active i {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: #4A5178;
  line-height: 1.7;
}

/* Forms */
.nexus-form-group {
  margin-bottom: 1.5rem;
}

.nexus-form-group label {
  display: block;
  font-weight: 600;
  color: #1A1F3A;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.nexus-form-group input,
.nexus-form-group textarea,
.nexus-form-group select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 2px solid #E5E7F5;
  border-radius: 8px;
  background-color: #FAFBFF;
  color: #1A1F3A;
  transition: var(--transition-smooth);
  font-size: 0.95rem;
}

.nexus-form-group input:focus,
.nexus-form-group textarea:focus,
.nexus-form-group select:focus {
  outline: none;
  border-color: var(--nexus-violet);
  background-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(123, 47, 247, 0.12);
}

.nexus-form-group input::placeholder,
.nexus-form-group textarea::placeholder {
  color: #A0A5C0;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--nexus-void);
  border-top: 2px solid var(--nexus-violet);
  padding: 1.25rem 1.5rem;
  z-index: 2000;
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.3);
}

.cookie-banner h3 {
  color: #ffffff;
}

.cookie-banner p {
  color: #C7CBE8;
}

.cookie-banner a {
  color: #6FE3FF;
  text-decoration: underline;
}

.cookie-banner .btn-primary {
  padding: 0.6rem 1.5rem;
  font-size: 0.9rem;
}

/* Hero / Gradient backgrounds */
.hero-gradient {
  background: radial-gradient(circle at 20% 20%, rgba(123, 47, 247, 0.35), transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(0, 229, 212, 0.25), transparent 50%),
              var(--nexus-void);
}

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

.grid-pattern {
  background-image: linear-gradient(rgba(123, 47, 247, 0.08) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(123, 47, 247, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Loading Spinner */
.nexus-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(123, 47, 247, 0.15);
  border-top-color: var(--nexus-violet);
  border-radius: 50%;
  animation: nexus-spin 0.8s linear infinite;
}

@keyframes nexus-spin {
  to { transform: rotate(360deg); }
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-up {
  animation: fadeInUp 0.7s ease forwards;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 229, 212, 0.3); }
  50% { box-shadow: 0 0 30px rgba(0, 229, 212, 0.6); }
}

.pulse-glow {
  animation: pulseGlow 2.5s ease-in-out infinite;
}

.text-gradient-nexus {
  background: linear-gradient(90deg, var(--nexus-cyan), var(--nexus-violet-light), var(--nexus-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Stats/Badge */
.stat-box {
  background-color: var(--nexus-surface);
  border: 1px solid var(--nexus-border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  color: var(--nexus-text-light);
}

.stat-box .stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--nexus-cyan), var(--nexus-violet-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-box .stat-label {
  color: var(--nexus-text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Pricing */
.pricing-card {
  background-color: #ffffff;
  border: 2px solid #E5E7F5;
  border-radius: 16px;
  padding: 2rem;
  cursor: default;
}

.pricing-card.featured {
  border-color: var(--nexus-violet);
  box-shadow: 0 12px 40px rgba(123, 47, 247, 0.2);
}

.badge-popular {
  background: linear-gradient(135deg, var(--nexus-violet), var(--nexus-magenta));
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  display: inline-block;
  letter-spacing: 0.03em;
}

/* Footer */
.site-footer {
  background-color: var(--nexus-void);
  color: var(--nexus-text-muted);
}

.site-footer h4 {
  color: #ffffff;
}

.site-footer a {
  color: var(--nexus-text-muted);
  transition: var(--transition-smooth);
}

.site-footer a:hover {
  color: var(--nexus-cyan);
}

.site-footer .social-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--nexus-surface);
  color: var(--nexus-text-light);
  transition: var(--transition-smooth);
}

.site-footer .social-icon:hover {
  background: linear-gradient(135deg, var(--nexus-violet), var(--nexus-cyan));
  color: #ffffff;
  transform: translateY(-3px);
}

@media (max-width: 768px) {
  .hero-gradient {
    background: radial-gradient(circle at 50% 0%, rgba(123, 47, 247, 0.3), transparent 60%), var(--nexus-void);
  }
}