/* dope.security-inspired midnight terminal system */
:root {
  --near-black: #090909;
  --almost-white: #f7f9fa;
  --soft-white: #f0f0f0;
  --steel: #828384;
  --graphite: #474747;
  --iron: #423738;
  --ash: #6b6b6b;
  --violet: #af50ff;
  --violet-fill: #8a3fd4;
  --violet-fill-hover: #9b52e0;
  --lavender: #e1bdff;
  --nav-bg: rgba(51, 50, 72, 0.7);
  --border: rgba(247, 249, 250, 0.2);
  --border-faint: rgba(247, 249, 250, 0.1);
  --wash: rgba(247, 249, 250, 0.08);
  --page: 1200px;
  --section-gap: 120px;
  --card-pad: 40px;
  --font: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --display: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--almost-white);
  background: var(--near-black);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Subtle starfield behind content */
.starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 1;
}
.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}
/* restore sticky header above canvas */
.site-header { position: sticky; z-index: 100; }
.bgm-player {
  position: fixed !important;
  right: 20px !important;
  bottom: 20px !important;
  left: auto !important;
  top: auto !important;
  z-index: 90 !important;
  margin: 0 !important;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
img { display: block; max-width: 100%; }
::selection { color: var(--near-black); background: var(--lavender); }
h1, h2, h3, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }

.page { width: min(100% - 48px, var(--page)); margin-inline: auto; }
.hairline { height: 1px; background: var(--border); border: 0; margin: 0; }

/* Frosted nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--ash);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
  width: min(100% - 48px, var(--page));
  margin-inline: auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0;
}
.brand__sub {
  color: var(--steel);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  padding: 10px 0;
  color: var(--steel);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav a:hover, .nav a.is-active { color: var(--almost-white); }
.nav a.is-active { border-bottom-color: var(--violet); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.menu-trigger {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--almost-white);
  font-size: 18px;
}
.mobile-nav {
  display: none;
  border-top: 1px solid var(--border-faint);
  padding: 12px 24px 20px;
  background: rgba(9, 9, 9, 0.95);
}
.mobile-nav.is-open { display: grid; gap: 4px; }
.mobile-nav a {
  padding: 12px 4px;
  color: var(--steel);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-faint);
}
.mobile-nav a:hover { color: var(--almost-white); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: background .2s, border-color .2s, color .2s, transform .2s;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible { outline: 1px solid var(--violet); outline-offset: 3px; }
.btn-filled {
  color: var(--almost-white);
  background: var(--violet-fill);
  border: 1px solid var(--violet-fill);
}
.btn-filled:hover { background: var(--violet-fill-hover); border-color: var(--violet-fill-hover); }
.btn-outline {
  color: var(--almost-white);
  background: transparent;
  border: 1px solid var(--almost-white);
}
.btn-outline:hover { background: var(--wash); }
.btn-pill {
  border-radius: 12px;
  padding: 16px 32px;
  color: var(--almost-white);
  background: rgba(138, 63, 212, 0.16);
  border: 1px solid rgba(138, 63, 212, 0.4);
}
.btn-pill:hover { background: rgba(175, 80, 255, 0.2); }
.btn-compact {
  min-height: 34px;
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--wash);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* Stamped section label */
.stamp {
  font-family: var(--mono);
  font-size: clamp(28px, 6vw, 72px);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft-white);
  word-break: break-word;
}
.stamp--sm {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--steel);
  line-height: 1.5;
}
.kicker {
  display: block;
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}

/* Hero */
.hero {
  position: relative;
  padding: 96px 0 120px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 70% 20%, rgba(175, 80, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(175, 80, 255, 0.08), transparent 50%),
    linear-gradient(180deg, #121018 0%, var(--near-black) 70%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background-image:
    linear-gradient(rgba(247, 249, 250, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 249, 250, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero__display {
  font-family: var(--display);
  font-style: normal;
  font-weight: 400;
  font-size: clamp(42px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--almost-white);
}
.hero__display .en {
  display: block;
  margin-bottom: 8px;
  color: var(--lavender);
}
.hero__title {
  margin-top: 20px;
  max-width: 14ch;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.03em;
}
.hero__lead {
  margin-top: 24px;
  max-width: 36em;
  color: var(--steel);
  font-size: 18px;
  font-weight: 300;
  line-height: 1.7;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

/* Boarding pass card */
.boarding {
  position: relative;
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 19.2px;
  background: rgba(237, 195, 196, 0.05);
  overflow: hidden;
}
.boarding::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--almost-white) 0 2px,
    transparent 2px 6px
  );
  opacity: 0.08;
  mask-image: linear-gradient(180deg, transparent, #000 20%, #000 80%, transparent);
  pointer-events: none;
}
.boarding__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}
.boarding__route {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--almost-white);
}
.boarding__route span { color: var(--violet); }
.boarding__line {
  height: 1px;
  margin: 20px 0;
  background: linear-gradient(90deg, var(--violet), transparent);
}
.boarding__title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.boarding__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}
.boarding__meta dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ash);
}
.boarding__meta dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--almost-white);
}
.boarding__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.boarding__tags span {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  color: var(--soft-white);
  letter-spacing: 0.04em;
}

/* Sections */
.section {
  padding: var(--section-gap) 0;
}
.section__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 56px;
}
.section__head p {
  max-width: 320px;
  color: var(--steel);
  font-size: 14px;
  line-height: 1.7;
  text-align: right;
}
/* Read more arrow swap */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
}
.tag-filter__btn {
  min-height: 34px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--steel);
  font-size: 13px;
  cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.tag-filter__btn:hover { color: var(--almost-white); border-color: var(--border); background: var(--wash); }
.tag-filter__btn.is-active {
  color: var(--near-black);
  background: var(--lavender);
  border-color: var(--lavender);
}
.tag-link { color: var(--lavender); border-bottom: 1px solid transparent; }
.tag-link:hover { border-bottom-color: var(--lavender); }
.muted { color: var(--steel); }

/* Article TOC */
.article-layout { position: relative; }
.article-toc {
  position: sticky;
  top: 88px;
  float: left;
  width: 180px;
  margin: 4px 0 24px -200px;
  padding-right: 12px;
}
.article-toc__label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.article-toc ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.article-toc a {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 8px;
  color: var(--steel);
  font-size: 12px;
  line-height: 1.4;
  transition: color .2s;
}
.article-toc a span {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ash);
}
.article-toc a:hover,
.article-toc a.is-active { color: var(--almost-white); }
.article-toc a.is-active span { color: var(--violet); }
.article-body h2 {
  scroll-margin-top: 96px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
}
.h2-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--violet);
}
@media (max-width: 1100px) {
  .article-toc {
    float: none;
    position: static;
    width: auto;
    margin: 0 0 28px;
    padding: 16px;
    border: 1px solid var(--border-faint);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
  }
}
.section__link,
.read-more-swap {
  display: inline-flex;
  align-items: center;
  gap: 0;
  margin-top: 28px;
  height: 48px;
  border: 0;
  overflow: hidden;
  background: transparent;
  color: var(--soft-white);
  font-size: 16px;
  font-weight: 500;
}
.read-more-arrow {
  flex: 0 0 25px;
  width: 25px;
  transition: flex-basis .24s ease, width .24s ease, opacity .2s ease, transform .24s ease;
}
.read-more-arrow-left {
  flex-basis: 0;
  width: 0;
  color: var(--violet);
  opacity: 0;
  transform: translateX(-12px);
}
.read-more-swap:hover .read-more-arrow-left,
.read-more-swap:focus-visible .read-more-arrow-left,
.section__link:hover .read-more-arrow-left,
.section__link:focus-visible .read-more-arrow-left {
  flex-basis: 25px;
  width: 25px;
  opacity: 1;
  transform: translateX(0);
}
.read-more-swap:hover .read-more-arrow-right,
.read-more-swap:focus-visible .read-more-arrow-right,
.section__link:hover .read-more-arrow-right,
.section__link:focus-visible .read-more-arrow-right {
  flex-basis: 0;
  width: 0;
  opacity: 0;
  transform: translateX(12px);
}
.read-more-swap:focus-visible,
.section__link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

/* Articles on home */
.article-list { border-top: 1px solid var(--border); }
.article-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 28px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--border-faint);
  transition: background .2s;
}
.article-row:hover { background: var(--wash); }
.article-row__date {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.article-row__date strong {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
}
.article-row__title {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.article-row__sub {
  margin-top: 10px;
  color: var(--steel);
  font-size: 14px;
  line-height: 1.7;
  max-width: 48em;
}
.article-row__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.article-row__tags span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
}
.article-row__go {
  display: none;
  align-self: center;
  color: var(--steel);
  font-size: 20px;
  transition: color .2s, transform .2s;
}
.article-row:hover .article-row__go {
  color: var(--violet);
  transform: translateX(4px);
}

/* Capabilities route */
.route {
  position: relative;
  min-height: 420px;
  margin-top: 20px;
  border: 1px solid var(--border-faint);
  border-radius: 19.2px;
  background:
    radial-gradient(ellipse 50% 40% at 70% 40%, rgba(175, 80, 255, 0.08), transparent 60%),
    rgba(255, 255, 255, 0.015);
  overflow: hidden;
}
.route__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.route__svg path {
  fill: none;
  stroke: rgba(175, 80, 255, 0.45);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}
.route__nodes {
  position: relative;
  z-index: 1;
  height: 420px;
}
.route__node {
  position: absolute;
  transform: translate(-50%, -50%);
  min-width: 108px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(9, 9, 9, 0.72);
  backdrop-filter: blur(8px);
  text-align: left;
  transition: border-color .2s, transform .2s, background .2s;
}
.route__node:hover, .route__node:focus-visible {
  border-color: var(--violet);
  background: rgba(175, 80, 255, 0.12);
  transform: translate(-50%, -50%) scale(1.04);
  outline: none;
  z-index: 2;
}
.route__node.is-signal {
  border-color: rgba(175, 80, 255, 0.65);
  box-shadow: 0 0 32px rgba(175, 80, 255, 0.25);
  background: rgba(175, 80, 255, 0.16);
}
.route__node strong {
  display: block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.route__node span {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  color: var(--steel);
}
.route__node i {
  position: absolute;
  top: -3px;
  left: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 12px rgba(175, 80, 255, 0.8);
}

/* About */
.about {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
}
.about__display {
  font-family: var(--display);
  font-style: normal;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.about__display .en {
  display: block;
  margin-bottom: 10px;
  color: var(--lavender);
}
.about__lead {
  margin-top: 28px;
  max-width: 34em;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--soft-white);
}
.about__body {
  margin-top: 18px;
  max-width: 36em;
  color: var(--steel);
  font-size: 15px;
  line-height: 1.8;
}
.about__aside {
  margin-top: 18px;
  color: var(--ash);
  font-size: 14px;
  line-height: 1.7;
}
.about__panel {
  padding: var(--card-pad);
  border: 1px solid var(--border);
  border-radius: 19.2px;
  background: rgba(255, 255, 255, 0.02);
}
.about__panel-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
}
.about__directions {
  display: grid;
  gap: 0;
  margin-top: 24px;
}
.about__direction {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--border-faint);
}
.about__direction code {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--violet);
}
.about__direction strong {
  display: block;
  font-size: 15px;
  font-weight: 500;
}
.about__direction span {
  display: block;
  margin-top: 4px;
  color: var(--steel);
  font-size: 13px;
}
.about__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.about__chips span {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  color: var(--soft-white);
}

/* Contact */
.contact {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 64px;
  align-items: start;
}
.contact__lead {
  margin-top: 20px;
  max-width: 28em;
  color: var(--steel);
  font-size: 15px;
  line-height: 1.75;
}
.contact__cards {
  display: grid;
  gap: 12px;
}
.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px 18px 18px;
  border: 1px solid var(--border);
  border-radius: 19.2px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color .2s, background .2s;
}
.contact-card:hover {
  border-color: rgba(175, 80, 255, 0.5);
  background: rgba(175, 80, 255, 0.06);
}
.contact-card__meta {
  min-width: 0;
  flex: 1;
  padding-left: 4px;
}
.contact-card__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}
.contact-card__value {
  margin-top: 8px;
  font-size: 16px;
  letter-spacing: 0.01em;
  word-break: break-all;
  color: var(--almost-white);
}

/* Expanding contact pill — violet circle, black face, white label */
.contact-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex: none;
  width: 36px;
  height: 36px;
  gap: 0;
  overflow: hidden;
  border: 0;
  border-radius: 10px;
  padding: 0;
  background: transparent;
  color: var(--soft-white);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  transition: width .32s cubic-bezier(.4, 0, .2, 1), background-color .32s cubic-bezier(.4, 0, .2, 1), color .28s ease;
}
.contact-pill::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--violet-fill);
}
.contact-pill-icon,
.contact-pill > span:last-child {
  position: relative;
  z-index: 1;
}
.contact-pill-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  color: #111;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
}
.contact-pill > span:last-child {
  position: absolute;
  left: 47px;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-5px);
  transition: opacity .18s ease .1s, transform .24s ease .06s;
}
.contact-pill:hover,
.contact-pill:focus-visible,
.contact-card:hover .contact-pill,
.contact-card:focus-within .contact-pill {
  width: 145px;
  background: var(--violet-fill);
  color: #fff;
}
.contact-pill:hover > span:last-child,
.contact-pill:focus-visible > span:last-child,
.contact-card:hover .contact-pill > span:last-child,
.contact-card:focus-within .contact-pill > span:last-child {
  opacity: 1;
  transform: translateX(0);
}
.contact-pill:focus-visible {
  outline: 2px solid var(--lavender);
  outline-offset: 4px;
}

/* Expanding CTA pill — violet body, dark circle, white label */
.expanding-cta,
.expanding-cta * { box-sizing: border-box; }
.expanding-cta {
  appearance: none;
  position: relative;
  display: inline-flex;
  width: auto;
  min-width: 0;
  height: 42px;
  align-items: center;
  justify-content: flex-start;
  gap: 0;
  overflow: hidden;
  border: 0;
  border-radius: 12px;
  background: var(--violet-fill);
  padding: 0 18px 0 14px;
  color: #fff;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -.01em;
  line-height: 1;
  cursor: pointer;
  transition: background-color .3s ease, transform .2s ease, padding .32s cubic-bezier(.4, 0, .2, 1);
}
.expanding-cta__icon {
  display: inline-grid;
  place-items: center;
  width: 0;
  margin-right: 0;
  overflow: hidden;
  color: #111;
  opacity: 0;
  transform: translateX(-8px);
  transition: width .28s cubic-bezier(.16, 1, .3, 1), margin-right .28s cubic-bezier(.16, 1, .3, 1), opacity .18s ease, transform .28s cubic-bezier(.16, 1, .3, 1);
}
.expanding-cta__icon svg {
  width: 12px;
  height: 12px;
  flex: none;
}
.expanding-cta__label {
  white-space: nowrap;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: -.45px;
  line-height: 1;
  transition: transform .28s cubic-bezier(.16, 1, .3, 1);
}
.expanding-cta:hover,
.expanding-cta:focus-visible {
  background: var(--violet-fill-hover);
}
.expanding-cta:hover .expanding-cta__icon,
.expanding-cta:focus-visible .expanding-cta__icon {
  width: 16px;
  margin-right: 8px;
  opacity: 1;
  transform: translateX(0);
}
.expanding-cta:hover .expanding-cta__label,
.expanding-cta:focus-visible .expanding-cta__label {
  transform: translateX(2px);
}
.expanding-cta:active { transform: scale(.98); }
.expanding-cta:focus-visible {
  outline: 2px solid var(--almost-white);
  outline-offset: 4px;
}
@media (prefers-reduced-motion: reduce) {
  .expanding-cta,
  .expanding-cta__icon,
  .expanding-cta__label,
  .contact-pill,
  .contact-pill > span:last-child,
  .read-more-arrow {
    transition: none;
  }
}

/* Visit stats — under boarding pass card */
.visit-stats {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  color: var(--soft-white);
}
.visit-stats[hidden] { display: none; }
.visit-stats__label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--steel);
}
.visit-stats__item {
  display: grid;
  gap: 2px;
  min-width: 40px;
  text-align: center;
}
.visit-stats__item strong {
  font-size: 16px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.visit-stats__item small {
  font-size: 10px;
  color: var(--steel);
}
@media (max-width: 600px) {
  .visit-stats {
    gap: 12px;
    margin-top: 18px;
    padding-top: 14px;
  }
}

/* Background music player — borderless minimal */
.bgm-player {
  display: grid;
  gap: 8px;
  width: 148px;
  padding: 0;
  background: transparent;
  color: var(--soft-white);
}
.bgm-player[hidden] { display: none; }
.bgm-bar {
  position: relative;
  height: 3px;
  border-radius: 99px;
  background: rgba(247, 249, 250, 0.16);
  cursor: pointer;
  overflow: hidden;
}
.bgm-progress {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0%;
  border-radius: inherit;
  background: var(--violet);
  transition: width 0.15s linear;
  pointer-events: none;
}
.bgm-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.bgm-skip {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--steel);
  cursor: pointer;
  transition: color .2s, background .2s;
}
.bgm-skip:hover { color: var(--almost-white); background: var(--wash); }
.bgm-skip svg { width: 11px; height: 11px; }
.bgm-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 10px;
  background: var(--violet-fill);
  color: #fff;
  cursor: pointer;
  transition: background .2s, transform .15s;
}
.bgm-toggle:hover { background: var(--violet-fill-hover); }
.bgm-toggle:active { transform: scale(0.98); }
.bgm-toggle:focus-visible, .bgm-skip:focus-visible, .bgm-bar:focus-visible {
  outline: 2px solid var(--lavender);
  outline-offset: 3px;
}
.bgm-toggle svg { width: 12px; height: 12px; }
.bgm-toggle .icon-pause { display: none; }
.bgm-player.is-playing .icon-play { display: none; }
.bgm-player.is-playing .icon-pause { display: block; }
@media (max-width: 600px) {
  .bgm-player {
    right: 14px;
    bottom: 14px;
    width: 132px;
  }
}

/* Footer coordinate */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  width: min(100% - 48px, var(--page));
  margin-inline: auto;
  font-size: 13px;
  color: var(--steel);
}
.site-footer__left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.site-footer__left strong {
  color: var(--almost-white);
  font-weight: 500;
}
.site-footer__coord {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.site-footer__coord em {
  font-style: normal;
  color: var(--violet);
}
.site-footer__beian {
  margin-top: 14px;
  font-size: 12px;
  color: var(--ash);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 20px;
  text-align: center;
}
.site-footer__beian a {
  color: var(--steel);
  font-weight: 400;
  text-decoration: none;
  transition: color .2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-footer__beian a:hover { color: var(--lavender); }
.police-badge__img {
  width: 16px;
  height: 16px;
  vertical-align: middle;
  border: 0;
}
.police-badge[hidden] { display: none !important; }

/* Articles index page */
.page-hero {
  padding: 88px 0 48px;
}
.page-hero h1 {
  margin-top: 16px;
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.05;
}
.page-hero p {
  margin-top: 18px;
  max-width: 34em;
  color: var(--steel);
  font-size: 16px;
  line-height: 1.75;
}
.article-index { padding-bottom: 100px; }
.article-index .article-row {
  grid-template-columns: 140px 1fr auto;
}

/* Article detail — reading polish */
.article-shell {
  width: min(100% - 48px, 720px);
  margin: 0 auto;
  padding: 72px 0 120px;
  text-wrap: pretty;
}
.article-shell__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 40px;
  color: var(--steel);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: color .2s;
}
.article-shell__back:hover { color: var(--almost-white); }
.article-shell__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}
.article-shell h1 {
  font-size: clamp(30px, 4.6vw, 44px);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.18;
  text-wrap: balance;
}
.article-shell__sub {
  margin-top: 18px;
  color: var(--steel);
  font-size: 17px;
  font-weight: 300;
  line-height: 1.7;
  max-width: 36em;
}
.article-shell__rule {
  margin: 40px 0 52px;
  height: 1px;
  background: var(--border);
  border: 0;
}
.article-body {
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--soft-white);
  font-weight: 300;
  word-break: normal;
  overflow-wrap: break-word;
  line-break: strict;
}
.article-body h2 {
  margin: 52px 0 18px;
  font-size: clamp(20px, 2.4vw, 24px);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.35;
  scroll-margin-top: 96px;
  text-wrap: balance;
}
.article-body h2:first-child { margin-top: 8px; }
.article-body p {
  margin: 0 0 1.35em;
  color: var(--soft-white);
  font-size: inherit;
  line-height: inherit;
  font-weight: inherit;
  text-align: left;
}
.article-body p:last-child { margin-bottom: 0; }
.article-body strong { font-weight: 550; color: var(--almost-white); }
.article-body em { font-style: normal; color: var(--lavender); }
.article-body ul {
  margin: 0 0 1.6em;
  padding: 0 0 0 2px;
  display: grid;
  gap: 0.75em;
  list-style: none;
}
.article-body li {
  position: relative;
  padding-left: 20px;
  color: var(--soft-white);
  font-size: 15.5px;
  line-height: 1.8;
  font-weight: 300;
}
.article-body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--violet);
  opacity: 0.9;
}
.article-body li > ul,
.article-body ol > li + li { margin-top: 0.4em; }
.article-body a {
  color: var(--lavender);
  text-decoration: underline;
  text-decoration-color: rgba(225, 189, 255, 0.35);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color .2s;
}
.article-body a:hover { text-decoration-color: var(--lavender); }
.article-body blockquote {
  margin: 1.8em 0;
  padding: 4px 0 4px 18px;
  border-left: 2px solid var(--violet);
  color: var(--steel);
  font-size: 15.5px;
}
.article-body code {
  font-family: var(--mono);
  font-size: 0.9em;
  padding: 0.15em 0.4em;
  border-radius: 6px;
  background: var(--wash);
  color: var(--lavender);
}
.article-body pre {
  margin: 1.6em 0;
  padding: 16px 18px;
  overflow: auto;
  border-radius: 12px;
  border: 1px solid var(--border-faint);
  background: rgba(255, 255, 255, 0.03);
}
.article-body pre code {
  padding: 0;
  background: transparent;
  color: var(--soft-white);
  font-size: 13px;
  line-height: 1.65;
}
.article-end {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--steel);
  font-size: 13px;
}

/* Tools page */
.tools-shell {
  width: min(100% - 48px, 920px);
  margin: 0 auto;
  padding: 48px 0 120px;
}
.tools-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--steel);
  font-size: 13px;
}
.tools-hero { margin: 64px 0 40px; }
.tools-hero h1 {
  margin-top: 16px;
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.tools-hero p {
  margin-top: 16px;
  color: var(--steel);
  max-width: 28em;
}
.tools-grid {
  display: grid;
  gap: 18px;
}
.tool-card-list {
  grid-template-columns: 1fr;
}
.tool-card-list .tool-copy {
  padding: 28px 32px;
}
.tools-note {
  margin-top: 28px;
  color: var(--steel);
  font-size: 13px;
}
.tool-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 19.2px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.02);
}
.tool-visual {
  display: grid;
  place-items: center;
  min-height: 280px;
  background:
    radial-gradient(circle at 40% 40%, rgba(175, 80, 255, 0.45), transparent 55%),
    linear-gradient(160deg, #1a1224, #0c0c0c);
  border-right: 1px solid var(--border-faint);
}
.tool-visual__mark {
  font-size: 72px;
  font-weight: 300;
  letter-spacing: -0.06em;
  color: var(--almost-white);
}
.tool-copy { padding: 36px; }
.tool-copy__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.tool-ready {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lavender);
}
.tool-ready i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 10px rgba(175, 80, 255, 0.8);
}
.tool-copy h2 {
  margin-top: 18px;
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.02em;
}
.tool-copy p { margin-top: 10px; color: var(--steel); font-size: 14px; }
.tool-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 28px 0;
}
.tool-meta div { display: grid; gap: 4px; }
.tool-meta span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
}
.tool-meta strong { font-size: 13px; font-weight: 500; color: var(--soft-white); }

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .55s ease var(--delay, 0ms), transform .55s cubic-bezier(.16, 1, .3, 1) var(--delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* Search dialog */
.search-dialog {
  width: min(560px, calc(100% - 32px));
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--almost-white);
}
.search-dialog::backdrop { background: rgba(0, 0, 0, 0.65); backdrop-filter: blur(4px); }
.search-panel {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 19.2px;
  background: #111;
}
.search-panel__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.search-panel__top h2 {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  font-weight: 400;
}
.search-input {
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--wash);
  color: var(--almost-white);
  outline: none;
}
.search-input:focus { border-color: rgba(175, 80, 255, 0.55); }
.search-results { margin-top: 14px; max-height: 280px; overflow: auto; }
.search-results p { color: var(--steel); font-size: 13px; padding: 8px 2px; }
.search-result {
  display: grid;
  gap: 4px;
  padding: 12px;
  border-radius: 8px;
}
.search-result:hover { background: var(--wash); }
.search-result strong { font-size: 14px; font-weight: 500; }
.search-result span { color: var(--steel); font-size: 12px; }

/* Responsive */
@media (max-width: 900px) {
  .nav { display: none; }
  .menu-trigger { display: grid; place-items: center; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .section__head { flex-direction: column; align-items: start; }
  .section__head p { text-align: left; max-width: 40em; }
  .article-row { grid-template-columns: 1fr; gap: 12px; }
  .article-row__go { display: none; }
  .about, .contact { grid-template-columns: 1fr; gap: 40px; }
  .tool-card { grid-template-columns: 1fr; }
  .tool-visual { min-height: 180px; border-right: 0; border-bottom: 1px solid var(--border-faint); }
  .route { min-height: 0; }
  .route__svg, .route__nodes { display: none; }
  .route-list { display: grid; gap: 10px; padding: 16px; }
}
@media (min-width: 901px) {
  .route-list { display: none; }
}
@media (max-width: 600px) {
  .page, .site-header__inner, .site-footer__inner { width: min(100% - 32px, var(--page)); }
  .hero { padding: 64px 0 80px; }
  .section { padding: 80px 0; }
  .boarding { padding: 24px; }
  .boarding__meta { grid-template-columns: 1fr; }
  .stamp { letter-spacing: 0.1em; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}