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

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 120px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: #F5F7FA;
  background-color: #0A0E1A;
  background-image:
    radial-gradient(ellipse 60% 40% at 85% -5%, rgba(0, 229, 255, 0.08), transparent),
    radial-gradient(ellipse 40% 30% at 5% 10%, rgba(183, 255, 0, 0.04), transparent),
    linear-gradient(rgba(61, 74, 93, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 74, 93, 0.06) 1px, transparent 1px);
  background-size: auto, auto, 48px 48px, 48px 48px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Archivo Black', 'Arial Black', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  color: #F5F7FA;
  margin: 0 0 0.75em;
}

p {
  margin: 0 0 1em;
}

a {
  color: #00E5FF;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

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

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

::selection {
  background: #B7FF00;
  color: #0A0E1A;
}

:focus-visible {
  outline: 2px solid #00E5FF;
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Variables ===== */
:root {
  --color-bg: #0A0E1A;
  --color-surface: #141A28;
  --color-primary: #B7FF00;
  --color-accent: #00E5FF;
  --color-text: #F5F7FA;
  --color-text-secondary: #8A94A6;
  --color-line: #3D4A5D;
  --color-warning: #FFB800;
  --color-success: #00FF87;
  --color-danger: #FF4D6D;

  --font-heading: 'Archivo Black', 'Arial Black', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', monospace;

  --font-scale-hero: clamp(2.5rem, 6vw, 5rem);
  --font-scale-section: clamp(1.5rem, 3vw, 2.5rem);
  --font-scale-body: 1rem;
  --font-scale-data: 1.25rem;

  --header-top: 16px;
  --header-min-height: 64px;
  --header-total: calc(var(--header-top) + var(--header-min-height));
  --container-width: 1200px;
  --transition: 0.2s ease;
}

/* ===== Layout Utilities ===== */
main,
section,
article,
aside,
header,
footer {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

#main-content {
  display: block;
  min-height: 60vh;
  padding-top: calc(var(--header-top) * 2 + var(--header-min-height) + 24px);
}

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

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  font-size: 13px;
}

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

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

.breadcrumb li:not(:first-child)::before {
  content: '/';
  color: var(--color-line);
  font-family: var(--font-mono);
  margin-right: 8px;
}

.breadcrumb li[aria-current='page'] {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-weight: 700;
}

/* ===== Skip Link ===== */
.site-skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 400;
  padding: 12px 20px;
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 8px;
  transition: top 0.2s ease;
}

.site-skip-link:hover {
  text-decoration: none;
}

.site-skip-link:focus {
  top: 16px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: var(--header-top);
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: calc(var(--container-width) + 48px);
  z-index: 200;
  background: rgba(10, 14, 26, 0.88);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(61, 74, 93, 0.6);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.site-header::before {
  content: '';
  position: absolute;
  left: 24px;
  bottom: -1px;
  width: 52px;
  height: 3px;
  background: var(--color-primary);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--header-min-height);
  padding: 0 20px 0 24px;
}

/* ===== Logo ===== */
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 20px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo__icon {
  display: inline-block;
  width: 12px;
  height: 26px;
  background: linear-gradient(135deg, var(--color-primary) 50%, var(--color-accent) 50%);
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
}

.site-logo__text {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

.site-logo__accent {
  color: var(--color-primary);
}

/* ===== Nav Toggle ===== */
.site-nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.site-nav-toggle:hover {
  border-color: var(--color-primary);
  background: rgba(183, 255, 0, 0.06);
}

.site-nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.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);
}

/* ===== Nav ===== */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-text);
  background-color: rgba(183, 255, 0, 0.08);
  border-color: rgba(183, 255, 0, 0.25);
  text-decoration: none;
}

.site-nav__link[aria-current='page'] {
  color: var(--color-bg);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.site-nav__link[aria-current='page']:hover {
  color: var(--color-bg);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ===== Footer ===== */
.site-footer {
  position: relative;
  margin-top: 80px;
  padding-top: 56px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
}

.site-footer::after {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--color-primary) 0,
    var(--color-primary) 80px,
    var(--color-accent) 80px,
    var(--color-accent) 160px,
    transparent 160px
  );
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 0.9fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}

.site-logo--footer {
  font-size: 22px;
  margin-bottom: 16px;
}

.site-footer__slogan {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  max-width: 380px;
}

.site-footer__trust {
  margin-bottom: 0;
}

.site-footer__nav,
.site-footer__legal,
.site-footer__contact {
  min-width: 0;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(61, 74, 93, 0.6);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.site-footer__list li {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  word-break: break-word;
}

.site-footer__list a {
  color: var(--color-text-secondary);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.site-footer__note {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px dashed rgba(61, 74, 93, 0.5);
  font-size: 13px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.site-footer__bottom {
  border-top: 1px solid rgba(61, 74, 93, 0.5);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 13px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.site-footer__bottom a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn--primary:hover {
  background: #c6ff33;
  color: var(--color-bg);
  border-color: #c6ff33;
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: rgba(0, 229, 255, 0.4);
}

.btn--ghost:hover {
  background: rgba(0, 229, 255, 0.08);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===== Tags ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: currentColor;
  border-radius: 50%;
  flex-shrink: 0;
}

.tag--success {
  color: var(--color-success);
  background: rgba(0, 255, 135, 0.08);
  border-color: rgba(0, 255, 135, 0.3);
}

.tag--warning {
  color: var(--color-warning);
  background: rgba(255, 184, 0, 0.08);
  border-color: rgba(255, 184, 0, 0.3);
}

.tag--danger {
  color: var(--color-danger);
  background: rgba(255, 77, 109, 0.08);
  border-color: rgba(255, 77, 109, 0.3);
}

.tag--live {
  color: #fff;
  background: rgba(255, 77, 109, 0.18);
  border-color: rgba(255, 77, 109, 0.5);
}

.tag--live::before {
  background: var(--color-danger);
  box-shadow: 0 0 6px var(--color-danger);
  animation: tag-pulse 1.6s ease-in-out infinite;
}

/* ===== Cards ===== */
.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  padding: 28px;
  transition: border-color 0.2s ease;
}

.card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 48px;
  height: 4px;
  background: var(--color-primary);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
  transition: width 0.2s ease;
}

.card:hover {
  border-color: rgba(0, 229, 255, 0.4);
}

.card:hover::before {
  width: 72px;
}

/* ===== Section Tag / Title ===== */
.section-tag {
  display: inline-block;
  padding: 6px 18px 6px 14px;
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 0 100%);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--font-scale-section);
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

/* ===== Data Display ===== */
.data-display {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--font-scale-data);
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(183, 255, 0, 0.06);
  border: 1px solid rgba(183, 255, 0, 0.25);
  padding: 8px 16px;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}

/* ===== Grids ===== */
.grid-2,
.grid-3 {
  display: grid;
  gap: 24px;
}

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

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

/* ===== Image Cover ===== */
.image-cover {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--color-surface);
  background-image:
    repeating-linear-gradient(45deg, rgba(61, 74, 93, 0.22) 0 1px, transparent 1px 10px),
    repeating-linear-gradient(-45deg, rgba(61, 74, 93, 0.1) 0 1px, transparent 1px 10px);
  border: 1px solid var(--color-line);
}

.image-cover::before {
  content: '';
  display: block;
  padding-top: 56.25%;
}

.image-cover > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-cover--wide::before {
  padding-top: 48%;
}

.image-cover--tall::before {
  padding-top: 120%;
}

.image-cover--portrait::before {
  padding-top: 75%;
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 56px 0 40px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

.page-hero::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 180px;
  height: 3px;
  background: var(--color-primary);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 100%, 0 100%);
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: var(--font-scale-hero);
  line-height: 1.08;
  margin-bottom: 12px;
  max-width: 12em;
}

.page-hero__desc {
  color: var(--color-text-secondary);
  font-size: 1.0625rem;
  line-height: 1.8;
  max-width: 42em;
}

/* ===== Scroll Reveal ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ===== Tag Pulse Animation ===== */
@keyframes tag-pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.8);
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .site-header {
    width: calc(100% - 20px);
    border-radius: 14px;
  }

  .site-header__inner {
    padding: 0 14px;
    min-height: 56px;
  }

  .site-logo {
    font-size: 18px;
  }

  .site-logo__icon {
    height: 22px;
    width: 10px;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(10, 14, 26, 0.98);
    border: 1px solid var(--color-line);
    border-radius: 14px;
    padding: 8px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    display: block;
    padding: 12px 16px;
    border-radius: 10px;
  }

  #main-content {
    padding-top: calc(var(--header-top) + 56px + 24px);
  }

  .site-footer {
    margin-top: 48px;
    padding-top: 40px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 36px;
  }

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

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding: 40px 0 32px;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-header {
    width: calc(100% - 16px);
  }

  .site-logo__text {
    font-size: 17px;
  }

  .site-logo__icon {
    width: 9px;
  }

  .card {
    padding: 20px;
  }
}

/* ===== Reduced Motion ===== */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn--primary:hover {
    transform: none;
  }
}