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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-style: italic;
  line-height: 1.05;
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
  border-radius: 0;
}

:root {
  --color-bg: #0B1D3A;
  --color-bg-2: #132747;
  --color-bg-deep: #081527;
  --color-accent: #FF6B35;
  --color-accent-hover: #FF9A6B;
  --color-data: #39FF14;
  --color-data-soft: #6FFF58;
  --color-text: #FFFFFF;
  --color-text-secondary: #B0B8C9;
  --color-text-dark: #232A35;
  --color-border: rgba(176, 184, 201, 0.22);
  --color-border-strong: rgba(176, 184, 201, 0.38);
  --font-heading: Impact, 'Anton', 'Noto Sans SC', sans-serif;
  --font-body: Inter, system-ui, 'Noto Sans SC', sans-serif;
  --font-data: 'Roboto Mono', ui-monospace, monospace;
  --container-max: 1280px;
  --header-z: 200;
  --fixed-z: 300;
  --transition-fast: 0.18s ease;
  --transition-medium: 0.3s ease;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 24px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: calc(var(--fixed-z) + 10);
  display: inline-block;
  padding: 10px 20px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 8px;
  outline: 3px solid var(--color-data);
  outline-offset: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 0;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--color-data);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
}

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

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

.btn--small {
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
}

.site-header {
  position: relative;
  z-index: var(--header-z);
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(180deg, #0E2244 0%, var(--color-bg) 100%);
  background-size: 40px 40px, 40px 40px, auto;
  border-bottom: 1px solid var(--color-border);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 22%, var(--color-data) 22%, var(--color-data) 30%, transparent 30%);
  z-index: 1;
}

.site-header__trust {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  background: rgba(19, 39, 71, 0.45);
}

.site-header__trust-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.trust-statement {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--color-data);
}

.trust-statement__pulse {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--color-data);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.55);
  animation: data-pulse 2.2s ease-in-out infinite;
}

@keyframes data-pulse {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.45);
  }
  50% {
    opacity: 0.75;
    box-shadow: 0 0 0 5px rgba(57, 255, 20, 0);
  }
}

.site-header__mainbar {
  padding: 18px 0;
}

.site-header__mainbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-brand {
  flex: 0 1 auto;
}

.site-brand__link {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--color-text);
  text-decoration: none;
}

.site-brand__name {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 28px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text);
  line-height: 1;
}

.site-brand__tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  padding-left: 14px;
  border-left: 1px solid var(--color-border-strong);
}

.site-header__actions {
  display: flex;
  align-items: center;
  flex: 0 0 auto;
}

.site-header__navwrap {
  position: relative;
  border-top: 1px solid var(--color-border);
  background: rgba(11, 29, 58, 0.72);
}

.site-header__navwrap-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-nav {
  flex: 1 1 auto;
}

.site-nav__list {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
}

.site-nav__item {
  flex: 0 0 auto;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 13px 20px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.18s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20px;
  width: calc(100% - 40px);
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

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

.site-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border-strong);
}

.site-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-data));
  z-index: calc(var(--fixed-z) + 10);
  pointer-events: none;
}

.site-footer {
  position: relative;
  margin-top: 80px;
  padding: 56px 0 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-deep) 100%);
  background-size: 100% 32px, auto;
  border-top: 1px solid var(--color-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 160px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 60%, var(--color-data) 60%, var(--color-data) 100%);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}

.site-footer__brand-name {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.03em;
  color: var(--color-text);
}

.site-footer__brand-tagline {
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.site-footer__trust {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-data);
}

.site-footer__col {
  min-width: 0;
}

.site-footer__heading {
  margin: 0 0 14px;
  padding-bottom: 8px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__list li + li {
  margin-top: 8px;
}

.site-footer__link {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.site-footer__link:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__contact {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.9;
  color: var(--color-text-secondary);
}

.site-footer__contact li {
  position: relative;
  padding-left: 14px;
}

.site-footer__contact li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 4px;
  height: 4px;
  background: var(--color-accent);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-text-secondary);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: var(--fixed-z);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(11, 29, 58, 0.92);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  font-size: 22px;
  font-weight: 700;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.3s ease, opacity 0.3s ease, background-color 0.18s ease, color 0.18s ease;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--color-accent);
  color: #fff;
}

.back-to-top:focus-visible {
  outline: 2px solid var(--color-data);
  outline-offset: 3px;
}

.back-to-top.is-visible {
  visibility: visible;
  opacity: 1;
}

.section-heading {
  position: relative;
  margin: 0 0 28px;
  padding-bottom: 14px;
  font-family: var(--font-heading);
  font-style: italic;
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.section-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0% 65%, var(--color-data) 65% 100%);
}

.section-heading__hint {
  display: block;
  margin-top: 6px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 400;
  color: var(--color-data);
  text-transform: none;
  letter-spacing: 0.05em;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
}

.breadcrumb__item {
  color: var(--color-text-secondary);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: '/';
  margin-right: 8px;
  color: var(--color-accent);
}

.breadcrumb__item--current {
  color: var(--color-text);
}

.breadcrumb__link {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--color-accent);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-data);
  background: rgba(57, 255, 20, 0.07);
  border: 1px solid rgba(57, 255, 20, 0.35);
}

.data-chip::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--color-data);
}

.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(145deg, var(--color-bg-2), var(--color-bg));
  background-size: 24px 24px, 24px 24px, auto;
  aspect-ratio: 16 / 9;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

.img-frame--portrait {
  aspect-ratio: 3 / 4;
}

.img-frame--banner {
  aspect-ratio: 21 / 9;
}

.img-frame::after {
  content: '';
  position: absolute;
  top: 12px;
  right: 12px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--color-accent);
  border-right: 2px solid var(--color-accent);
  opacity: 0.75;
}

.img-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
}

.tabs__nav {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-bottom: 0;
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
}

.tabs__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.tabs__btn:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.03);
}

.tabs__btn[aria-selected="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tabs__panel {
  padding: 24px 0;
  animation: tab-fade 0.3s ease;
}

@keyframes tab-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-header__mainbar {
    padding: 14px 0;
  }
}

@media (max-width: 767px) {
  .container {
    padding-inline: 16px;
  }

  .site-header__trust {
    padding: 6px 0;
  }

  .trust-statement {
    font-size: 11px;
  }

  .site-header__mainbar {
    padding: 12px 0;
  }

  .site-brand__name {
    font-size: 22px;
  }

  .site-brand__tagline {
    display: none;
  }

  .site-header__navwrap-inner {
    padding-block: 8px;
  }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    visibility: hidden;
    max-height: 0;
    overflow-y: auto;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transition: max-height 0.3s ease, visibility 0s linear 0.3s;
  }

  .site-nav[data-open] {
    visibility: visible;
    max-height: calc(100vh - 140px);
    transition: max-height 0.3s ease, visibility 0s;
  }

  .site-nav__list {
    flex-direction: column;
  }

  .site-nav__item + .site-nav__item {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav__link {
    padding: 14px 22px;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--color-accent);
    background: rgba(255, 107, 53, 0.08);
    border-left: 3px solid var(--color-accent);
  }

  .site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  .site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-footer {
    margin-top: 56px;
    padding: 40px 0 0;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .trust-statement__pulse {
    animation: none;
  }

  .tabs__panel {
    animation: none;
  }
}