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

:root {
  /* Brand Colors */
  --primary-bg: #0b1a2a;
  --primary-accent: #39ff14;
  --secondary-accent: #c0c0c0;
  --text-primary: #ffffff;
  --text-secondary: #a0b0c0;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: 1px solid rgba(57, 255, 20, 0.3);
  --gradient-main: linear-gradient(135deg, #0b1a2a 0%, #1a3a5c 100%);

  /* Typography */
  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Roboto', system-ui, -apple-system, sans-serif;
  --font-data: 'JetBrains Mono', 'Consolas', monospace;

  /* Spacing */
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --max-width: 1200px;

  /* Motion */
  --transition-speed: 0.3s;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

a {
  color: var(--primary-accent);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

a:hover {
  color: var(--text-primary);
}

img,
svg {
  display: block;
  max-width: 100%;
}

ul {
  list-style: none;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--primary-accent);
  color: var(--primary-bg);
  padding: 0.5rem 1rem;
  z-index: 10000;
  font-weight: bold;
  border-radius: 0 0 4px 4px;
}

.skip-link:focus-visible {
  top: 0;
}

/* Progress Bar */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--primary-accent);
  z-index: 9999;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

/* Background Data Flow */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(90deg, transparent 50%, rgba(57, 255, 20, 0.03) 50%),
    linear-gradient(0deg, transparent 50%, rgba(57, 255, 20, 0.02) 50%);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  animation: dataFlow 8s linear infinite;
}

@keyframes dataFlow {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(40px, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  body::before {
    animation: none;
    opacity: 0.3;
  }
  html {
    scroll-behavior: auto;
  }
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
  z-index: 1;
}

/* Section */
.section {
  padding: var(--space-xl) 0;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
  background: rgba(11, 26, 42, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(57, 255, 20, 0.15);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Navigation */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(11, 26, 42, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(57, 255, 20, 0.2);
  padding: var(--space-md);
}

.nav[data-open] {
  display: block;
}

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

.nav-link {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-secondary);
  padding: 0.5rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

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

.nav-link[aria-current="page"] {
  color: var(--primary-accent);
  border-bottom-color: var(--primary-accent);
}

/* Footer */
.site-footer {
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(57, 255, 20, 0.15);
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  margin-top: var(--space-xl);
  text-align: center;
  position: relative;
  z-index: 1;
}

.site-footer .brand {
  justify-content: center;
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.footer-links a {
  font-size: 0.9rem;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
}

.footer-icp {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-md);
}

/* Button */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.btn-primary {
  background: var(--primary-accent);
  color: var(--primary-bg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(57, 255, 20, 0.4);
}

.btn:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* Card */
.card {
  background: var(--card-bg);
  border: var(--card-border);
  border-radius: 8px;
  padding: var(--space-lg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(57, 255, 20, 0.15);
}

/* Data Display */
.data-number {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 2rem;
  color: var(--primary-accent);
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal[data-visible] {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Grid & Layout Utilities */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.split-screen {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

/* Focus Visible */
*:focus-visible {
  outline: 2px solid var(--primary-accent);
  outline-offset: 2px;
}

/* Responsive */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .nav {
    display: flex !important;
    position: static;
    background: none;
    border: none;
    padding: 0;
    backdrop-filter: none;
  }

  .nav-list {
    flex-direction: row;
    gap: 0.25rem;
  }

  .nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    border-bottom: 2px solid transparent;
  }

  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .split-screen {
    grid-template-columns: 1fr 1fr;
  }

  .footer-contact {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-lg);
  }

  .footer-icp {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-md);
  }
}

@media (min-width: 1024px) {
  .site-header {
    padding-left: 0;
    padding-right: 0;
  }
}