:root {
  --color-primary: #0A1E3D;
  --color-primary-alt: #122A54;
  --color-primary-soft: rgba(18, 42, 84, 0.35);
  --color-accent: #00FFB3;
  --color-accent-alt: #B44DFF;
  --color-text: #E6F0FF;
  --color-text-secondary: #A8B8D8;
  --color-cream: #F5F7FB;
  --color-warning: #FFD166;
  --font-headline: 'Oswald', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --container-width: 1200px;
  --space: 16px;
  --space-sm: 8px;
  --space-lg: 32px;
  --space-xl: 64px;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background:
    radial-gradient(ellipse 80% 50% at 90% -10%, rgba(180, 77, 255, 0.14), transparent),
    radial-gradient(ellipse 60% 40% at 10% 110%, rgba(0, 255, 179, 0.08), transparent),
    var(--color-primary);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

h3 {
  font-size: 1.2rem;
}

p {
  margin-bottom: 1em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul {
  list-style: none;
}

button {
  font: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

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

::selection {
  background: var(--color-accent);
  color: var(--color-primary);
}

.container {
  width: min(100% - 2 * var(--space), var(--container-width));
  margin-inline: auto;
}

.page-main {
  padding: var(--space-xl) 0;
}

.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--radius-pill);
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 12px;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  line-height: 1.4;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  box-shadow: 0 4px 18px rgba(0, 255, 179, 0.25);
}

.btn-primary:hover {
  background: #66ffd4;
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 255, 179, 0.35);
}

.btn-ghost {
  border: 1px solid rgba(230, 240, 255, 0.3);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: var(--space-lg) 0 var(--space);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

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

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

.breadcrumb li + li::before {
  content: '/';
  margin-right: 6px;
  color: rgba(230, 240, 255, 0.3);
}

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

.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--color-primary-alt), var(--color-primary));
  aspect-ratio: 4 / 3;
}

.img-frame--wide {
  aspect-ratio: 16 / 9;
}

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

.img-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(0, 255, 179, 0.1), transparent 40%),
    linear-gradient(315deg, rgba(180, 77, 255, 0.1), transparent 50%);
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.img-frame:hover::before {
  opacity: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 30, 61, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(180, 77, 255, 0.22);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 2;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  border-radius: 0 3px 3px 0;
}

.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
  padding-top: 14px;
  padding-bottom: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  position: relative;
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-alt));
  box-shadow: 0 0 18px rgba(0, 255, 179, 0.25);
  transition: transform 0.3s ease;
}

.brand:hover .brand__mark {
  transform: rotate(15deg);
}

.brand__mark::before {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--color-primary);
}

.brand__mark::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px rgba(0, 255, 179, 0.75);
}

.brand__copy {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.brand__name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

.brand__slogan {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  color: var(--color-text-secondary);
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(0, 255, 179, 0.2);
  border-radius: var(--radius-pill);
  background: rgba(0, 255, 179, 0.06);
}

.status-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.75);
  }
}

.status-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
  white-space: nowrap;
}

.site-header__bar {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  background: var(--color-primary-soft);
}

.site-header__bar::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 64px;
  height: 100%;
  background: linear-gradient(90deg, rgba(0, 255, 179, 0.07), transparent);
  clip-path: polygon(0 0, 100% 0, 55% 100%, 0 100%);
  pointer-events: none;
}

.site-header__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
  min-height: 50px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 12px 14px;
  font-family: var(--font-headline);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 8px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.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);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(230, 240, 255, 0.2);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--color-accent);
}

.nav-toggle__bar {
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

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

.site-footer {
  position: relative;
  background: var(--color-primary);
  border-top: 1px solid rgba(180, 77, 255, 0.25);
  margin-top: var(--space-xl);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: min(40%, 480px);
  height: 1px;
  background: var(--color-accent);
}

.site-footer::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 8px;
  background: linear-gradient(90deg, var(--color-accent-alt), transparent);
  border-radius: 0 0 0 8px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding: 56px 0 40px;
}

.footer-col__title {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.footer-brand__logo {
  display: inline-block;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  color: var(--color-text);
}

.footer-brand__desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
}

.footer-brand__trust {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-warning);
}

.footer-nav ul,
.footer-resources ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-resources a {
  display: inline-block;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-nav a:hover,
.footer-resources a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact__list li {
  position: relative;
  padding-left: 18px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-contact__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-alt);
  box-shadow: 0 0 8px rgba(180, 77, 255, 0.5);
}

.footer-contact__note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid rgba(230, 240, 255, 0.08);
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 1.35rem;
  box-shadow: 0 8px 24px rgba(0, 255, 179, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, box-shadow 0.3s ease;
}

.to-top::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(0, 255, 179, 0.35);
  animation: halo 2.4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes halo {
  0%, 100% {
    transform: scale(0.92);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.08);
    opacity: 0.9;
  }
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(0, 255, 179, 0.45);
}

[data-reveal].is-ready {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .site-nav {
    gap: 4px;
  }

  .site-nav__link {
    font-size: 0.85rem;
    padding: 12px 8px;
  }

  .site-nav__link::after {
    left: 8px;
    right: 8px;
  }
}

@media (max-width: 767px) {
  .site-header__bar::before {
    display: none;
  }

  .site-header__status {
    display: none;
  }

  .brand__name {
    font-size: 1.05rem;
  }

  .brand__slogan {
    letter-spacing: 0.18em;
  }

  .brand__mark {
    width: 34px;
    height: 34px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 110;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px var(--space) 20px;
    background: rgba(10, 30, 61, 0.98);
    border-bottom: 1px solid rgba(0, 255, 179, 0.15);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: 13px 2px;
    border-bottom: 1px solid rgba(230, 240, 255, 0.06);
    font-size: 1rem;
  }

  .site-nav__link:last-child {
    border-bottom: none;
  }

  .site-nav__link::after {
    left: 2px;
    bottom: 6px;
    width: 32px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 0 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }

  .to-top {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
}

@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;
    scroll-behavior: auto !important;
  }

  [data-reveal].is-ready,
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .status-dot,
  .to-top::after {
    animation: none !important;
  }

  .brand:hover .brand__mark,
  .btn:hover,
  .to-top:hover {
    transform: none;
  }
}