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

:root {
  --font-heading: 'Arial Black', 'Impact', 'Helvetica Neue', sans-serif;
  --font-body: 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Courier New', monospace;
  --color-primary: #0A1B2E;
  --color-accent-green: #00FF9D;
  --color-accent-orange: #FF6B35;
  --color-accent-purple: #7A00FF;
  --color-bg-dark: #121820;
  --color-bg-light: #F5F7FA;
  --color-bg-mid: #2A3441;
  --color-text-muted: #D0D8E2;
  --color-danger: #FF3B3B;
  --color-text-on-dark: #F5F7FA;
  --color-text-on-light: #0A1B2E;
  --container-max: 1200px;
  --header-h: 72px;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent-green);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 1100;
  background: var(--color-accent-green);
  color: var(--color-primary);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 1rem;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(10, 27, 46, 0.92);
  border-bottom-color: var(--color-bg-mid);
  backdrop-filter: blur(12px);
}

.scroll-progress {
  position: absolute;
  bottom: -3px;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent-green), var(--color-accent-orange));
  z-index: 1001;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--color-accent-green), var(--color-accent-purple) 70%);
  box-shadow: 0 0 12px rgba(0, 255, 157, 0.3);
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.85;
}

.brand-mark::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-green);
  box-shadow: 0 0 8px var(--color-accent-green);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--color-text-on-dark);
}

.site-nav {
  display: flex;
}

.nav-list {
  display: flex;
  gap: 2rem;
}

.nav-list a {
  display: inline-block;
  color: rgba(245, 247, 250, 0.85);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--color-accent-green);
  border-color: var(--color-accent-green);
}

.nav-list a[aria-current="page"] {
  color: var(--color-accent-green);
  border-color: var(--color-accent-green);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-accent-green);
  border-radius: 999px;
  color: var(--color-accent-green);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, box-shadow 0.2s ease;
  animation: versionPulse 3s ease-in-out infinite;
}

.version-badge:hover,
.version-badge:focus-visible {
  background: var(--color-accent-green);
  color: var(--color-primary);
  box-shadow: 0 0 18px rgba(0, 255, 157, 0.4);
}

.version-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent-green);
  box-shadow: 0 0 8px var(--color-accent-green);
}

.version-badge:hover .version-dot {
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
}

.version-label {
  display: inline;
}

@keyframes versionPulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 157, 0.4);
  }
  50% {
    box-shadow: 0 0 12px 4px rgba(0, 255, 157, 0.1);
  }
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  cursor: pointer;
  position: relative;
}

.nav-toggle-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 2px;
  background: var(--color-text-on-dark);
  transition: background 0.2s;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--color-text-on-dark);
  transition: transform 0.25s ease;
}

.nav-toggle-icon::before {
  bottom: -6px;
}

.nav-toggle-icon::after {
  top: -6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-footer {
  background: var(--color-bg-dark);
  border-top: 1px solid var(--color-bg-mid);
  color: var(--color-text-muted);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--space-xl);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand .brand {
  margin-bottom: var(--space-sm);
}

.footer-tagline {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-top: 0;
}

.footer-heading {
  color: var(--color-text-on-dark);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
}

.footer-links-wrap {
  display: flex;
  flex-direction: column;
}

.footer-links {
  display: grid;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--color-accent-green);
}

.footer-contact {
  display: flex;
  flex-direction: column;
}

.footer-contact p {
  margin: 0.4rem 0;
  font-size: 0.9rem;
  line-height: 1.45;
}

.footer-bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-bg-mid);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-bottom p {
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  border: 2px solid transparent;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, border-color 0.2s;
}

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

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

.btn-ghost {
  background: transparent;
  border-color: var(--color-text-muted);
  color: var(--color-text-on-dark);
}

.btn-ghost:hover {
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
}

.section {
  padding: var(--space-2xl) 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--color-text-on-dark);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.section-title[data-accent="green"] {
  color: var(--color-accent-green);
}

.tag {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--color-bg-mid);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}

.tag-green {
  background: rgba(0, 255, 157, 0.15);
  color: var(--color-accent-green);
  border-color: rgba(0, 255, 157, 0.3);
}

.tag-orange {
  background: rgba(255, 107, 53, 0.15);
  color: var(--color-accent-orange);
  border-color: rgba(255, 107, 53, 0.3);
}

.card {
  background: var(--color-bg-mid);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.media-frame {
  position: relative;
  border-radius: var(--radius);
  background: var(--color-bg-mid);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-accent-green);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-accent-green);
}

.grid-2,
.grid-3 {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (min-width: 641px) and (max-width: 960px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  .header-inner {
    gap: 1rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 1rem;
    width: min(280px, 80vw);
    background: var(--color-bg-mid);
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    padding: 0.75rem;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

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

  .nav-list a {
    display: block;
    padding: 0.65rem 0.9rem;
    border-bottom: none;
    border-radius: 6px;
  }

  .nav-list a:hover,
  .nav-list a[aria-current="page"] {
    background: rgba(255, 255, 255, 0.08);
    border: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
  }

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

@media (max-width: 640px) {
  .container {
    padding-inline: 1rem;
  }

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

  .version-label {
    display: none;
  }

  .version-badge {
    padding: 0.4rem;
    border-radius: 50%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .site-nav,
  .scroll-progress {
    transition: none;
  }
}