/* ==========================================================
   Site Kit · 夜航档案信息港
   /assets/site.css
   ========================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h, 132px) + 12px);
}

body,
h1, h2, h3, h4, h5,
p, ul, ol, dl, dd, figure, blockquote {
  margin: 0;
}

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

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

/* ---------- tokens ---------- */
:root {
  --ink: #07120F;
  --deep: #0E2A22;
  --card: #1B1D1C;
  --blue: #2F6FE4;
  --blue-lt: #6EA8FF;
  --gold: #D8A94A;
  --magenta: #E43F8F;
  --lime: #B8E04A;
  --paper: #F2EAD9;

  --paper-86: rgba(242, 234, 217, .86);
  --paper-70: rgba(242, 234, 217, .72);
  --paper-45: rgba(242, 234, 217, .45);
  --paper-22: rgba(242, 234, 217, .22);
  --paper-10: rgba(242, 234, 217, .10);

  --gold-45: rgba(216, 169, 74, .45);
  --gold-30: rgba(216, 169, 74, .30);
  --gold-16: rgba(216, 169, 74, .16);
  --blue-24: rgba(47, 111, 228, .24);
  --magenta-24: rgba(228, 63, 143, .24);

  --font-display: "Oswald", "DIN Condensed", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;

  --shell: 1180px;
  --gutter: clamp(1.1rem, 3vw, 2.6rem);
  --pad-y: clamp(2.6rem, 6vw, 5.4rem);
  --header-h: 132px;

  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: 200ms;
}

/* ---------- base typography ---------- */
body {
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .07em;
  color: var(--paper);
}

h1 { font-size: clamp(1.85rem, 3.4vw, 2.7rem); }
h2 { font-size: clamp(1.35rem, 2.3vw, 1.85rem); }
h3 { font-size: clamp(1.08rem, 1.6vw, 1.28rem); }

strong { color: var(--paper); font-weight: 700; }

::selection {
  background: var(--magenta);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- utilities ---------- */
.shell {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .82em;
  letter-spacing: .12em;
}

.display {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: .96;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--paper);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
  flex: 0 0 auto;
}

.lead {
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  line-height: 1.8;
  color: var(--paper-70);
  max-width: 58ch;
}

.doc-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem 1rem;
  margin-bottom: .9rem;
}

.doc-header__meta {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  color: var(--lime);
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 200;
  padding: .68rem 1.1rem;
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
  font-size: .84rem;
  letter-spacing: .1em;
  border-radius: 2px;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: .8rem;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7, 18, 15, .96);
  border-bottom: 1px solid var(--gold-16);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.header-top {
  background: linear-gradient(90deg, rgba(14, 42, 34, .95), rgba(7, 18, 15, .55));
  border-bottom: 1px solid rgba(216, 169, 74, .14);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(.9rem, 2.6vw, 2.4rem);
  min-height: 74px;
  padding-block: .7rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  flex: 0 0 auto;
}

.brand-mark__glyph {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--gold);
  background: rgba(216, 169, 74, .08);
  color: var(--gold);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.brand-mark:hover .brand-mark__glyph {
  background: var(--gold);
  color: var(--ink);
}

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

.brand-mark__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: .18em;
  color: var(--paper);
}

.brand-mark__sub {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--paper-45);
}

.status-strip {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .42rem;
  padding: .24rem .62rem;
  border: 1px solid var(--paper-10);
  background: rgba(27, 29, 28, .72);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--paper-70);
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.status-pill:hover {
  border-color: var(--gold-45);
  color: var(--paper);
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--paper);
  flex: 0 0 auto;
}

.dot--gold { background: var(--gold); box-shadow: 0 0 6px rgba(216, 169, 74, .85); }
.dot--blue { background: var(--blue-lt); box-shadow: 0 0 6px rgba(110, 168, 255, .85); }
.dot--lime { background: var(--lime); box-shadow: 0 0 6px rgba(184, 224, 74, .85); }
.dot--magenta { background: var(--magenta); box-shadow: 0 0 6px rgba(228, 63, 143, .85); }

.header-actions {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex: 0 0 auto;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .58rem 1.05rem;
  font-size: .82rem;
  letter-spacing: .1em;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: 2px;
  white-space: nowrap;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.btn--solid {
  background: var(--magenta);
  border-color: var(--magenta);
  color: var(--paper);
}

.btn--solid:hover {
  background: #F0579D;
  border-color: #F0579D;
  box-shadow: 0 0 18px rgba(228, 63, 143, .45);
}

.btn--ghost {
  border-color: var(--gold-45);
  color: var(--gold);
  background: transparent;
}

.btn--ghost:hover {
  background: rgba(216, 169, 74, .12);
  border-color: var(--gold);
  color: var(--paper);
}

.btn--line {
  border-color: rgba(110, 168, 255, .4);
  color: var(--blue-lt);
  background: transparent;
}

.btn--line:hover {
  background: rgba(47, 111, 228, .16);
  border-color: var(--blue-lt);
  color: var(--paper);
}

/* ---------- nav bar ---------- */
.header-nav {
  background: rgba(7, 18, 15, .92);
}

.header-nav__inner {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  min-height: 52px;
}

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(.5rem, 1.7vw, 1.6rem);
}

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

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .4rem 0;
  font-size: .86rem;
  letter-spacing: .14em;
  color: var(--paper-70);
  transition: color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .02rem;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.site-nav__link:hover { color: var(--paper); }
.site-nav__link:hover::after { transform: scaleX(1); }

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

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  height: 2px;
  background: var(--magenta);
}

.header-nav__meta {
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--paper-45);
  white-space: nowrap;
}

.header-nav__meta .mono {
  font-size: 1em;
  letter-spacing: .12em;
  color: var(--lime);
}

/* ---------- nav toggle ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .6rem;
  padding: .44rem .7rem;
  border: 1px solid var(--gold-30);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars > span {
  display: block;
  height: 1px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open] .nav-toggle {
  border-color: var(--lime);
  color: var(--lime);
}

.site-header[data-open] .nav-toggle__bars > span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars > span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars > span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); }

/* ---------- progress + to top ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress > span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--blue-lt), var(--gold) 48%, var(--magenta));
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

.to-top {
  position: fixed;
  right: clamp(.8rem, 2vw, 1.8rem);
  bottom: clamp(.8rem, 2vw, 1.8rem);
  z-index: 70;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: rgba(27, 29, 28, .94);
  border: 1px solid var(--gold-30);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: .95rem;
  line-height: 1;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease),
    background var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--gold);
  color: var(--ink);
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: var(--deep);
  color: var(--paper-70);
  border-top: 1px solid var(--gold-30);
}

.footer-slant {
  height: 18px;
  background:
    repeating-linear-gradient(118deg, rgba(216, 169, 74, .38) 0 1px, transparent 1px 9px),
    linear-gradient(90deg, var(--blue-24), rgba(216, 169, 74, .28) 54%, var(--magenta-24));
  clip-path: polygon(0 0, 100% 0, 100% 34%, 0 100%);
}

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .4rem 1.4rem;
  padding-block: clamp(1.4rem, 3.2vw, 2.2rem) clamp(.7rem, 1.8vw, 1.1rem);
}

.footer-head__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  letter-spacing: .26em;
  color: var(--paper);
}

.footer-head__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--paper-45);
}

.footer-dock {
  display: grid;
  grid-template-columns: 1.1fr .95fr 1.3fr .85fr;
  gap: clamp(1.2rem, 3vw, 3rem);
  align-items: start;
  padding-bottom: clamp(1.6rem, 3.4vw, 2.6rem);
}

.footer-dock__col { min-width: 0; }
.footer-dock__col:nth-child(2) { padding-top: 1.5rem; }
.footer-dock__col:nth-child(3) { padding-top: .55rem; }
.footer-dock__col:nth-child(4) { padding-top: 2.1rem; }

.footer-dock__title {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: .68rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
  padding-bottom: .55rem;
  margin-bottom: .85rem;
  border-bottom: 1px solid rgba(216, 169, 74, .22);
}

.footer-links {
  display: grid;
  gap: .4rem;
}

.footer-links a {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  font-size: .86rem;
  color: var(--paper-70);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-links a::before {
  content: "·";
  color: var(--blue-lt);
  font-size: .95em;
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover {
  color: var(--gold);
  padding-left: .2rem;
}

.footer-links a:hover::before { color: var(--gold); }

.footer-batches {
  display: grid;
  gap: .55rem;
}

.footer-batches li {
  padding-left: .75rem;
  border-left: 1px solid rgba(110, 168, 255, .35);
  font-size: .84rem;
  line-height: 1.65;
  color: var(--paper-70);
}

.footer-batches b {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--lime);
}

.footer-contact {
  display: grid;
  gap: .5rem;
}

.footer-contact__row {
  display: grid;
  grid-template-columns: 3.1em minmax(0, 1fr);
  gap: .5rem;
  align-items: baseline;
}

.footer-contact dt {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .18em;
  color: var(--paper-45);
}

.footer-contact dd {
  font-size: .84rem;
  line-height: 1.62;
  color: var(--paper-70);
  overflow-wrap: anywhere;
}

.footer-note {
  margin-top: .85rem;
  padding-top: .65rem;
  border-top: 1px dashed rgba(242, 234, 217, .16);
  font-size: .74rem;
  line-height: 1.7;
  color: var(--paper-45);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem 1.5rem;
  padding-block: 1rem 1.5rem;
  border-top: 1px solid var(--paper-10);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--paper-45);
}

.footer-base__brand {
  color: var(--paper);
  letter-spacing: .2em;
}

.footer-base__icp { color: var(--gold); }

.footer-base__link {
  margin-left: auto;
  color: var(--blue-lt);
  transition: color var(--dur) var(--ease);
}

.footer-base__link:hover { color: var(--lime); }

/* ---------- breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--paper-45);
  padding-block: 1rem .2rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
}

.breadcrumb li { display: flex; align-items: center; gap: .45rem; }

.breadcrumb li + li::before {
  content: "/";
  color: var(--gold-45);
}

.breadcrumb a { color: var(--paper-70); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover { color: var(--gold); }

/* ---------- page head / prose ---------- */
.page-head {
  padding-block: clamp(1.4rem, 3.4vw, 2.6rem) clamp(.9rem, 2.2vw, 1.6rem);
}

.page-head__title {
  margin-top: .5rem;
  max-width: 22ch;
}

.page-head .lead { margin-top: .9rem; }

.prose { max-width: 68ch; }

.prose p {
  color: var(--paper-86);
  margin-top: 1.05em;
  line-height: 1.85;
}

.prose p:first-child { margin-top: 0; }

.prose ul,
.prose ol {
  margin-top: 1em;
  display: grid;
  gap: .5rem;
}

.prose ul li,
.prose ol li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--paper-86);
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 1px;
  background: var(--gold);
}

.prose ol { counter-reset: prose-num; }
.prose ol li { counter-increment: prose-num; }

.prose ol li::before {
  content: counter(prose-num, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: .72em;
  letter-spacing: .08em;
  color: var(--blue-lt);
}

/* ---------- asymmetric skeleton ---------- */
.shell-axis {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  gap: clamp(1.3rem, 3.4vw, 3.2rem);
  align-items: start;
  padding-block: clamp(1.2rem, 3vw, 2.4rem);
}

/* ---------- index axis ---------- */
.index-axis {
  position: sticky;
  top: calc(var(--header-h, 132px) + 1.2rem);
  border-left: 1px solid var(--gold-30);
  padding-left: 1rem;
}

.index-axis__label {
  display: block;
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: .8rem;
}

.index-axis__list {
  display: grid;
  gap: 0;
}

.axis-link {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .42rem 0;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--paper-45);
  border-bottom: 1px dashed rgba(242, 234, 217, .08);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.axis-link__num {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--blue-lt);
  flex: 0 0 auto;
  transition: color var(--dur) var(--ease);
}

.axis-link:hover {
  color: var(--paper);
  padding-left: .3rem;
}

.axis-link[aria-current="location"] { color: var(--lime); }
.axis-link[aria-current="location"] .axis-link__num { color: var(--lime); }

/* ---------- section head ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: .5rem 1.2rem;
  padding-bottom: .8rem;
  margin-bottom: 1.3rem;
  border-bottom: 1px solid rgba(216, 169, 74, .22);
}

.section-head__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .18em;
  color: var(--paper-45);
}

/* ---------- rules & bands ---------- */
.rule {
  height: 1px;
  border: 0;
  margin-block: clamp(1.8rem, 4vw, 3rem);
  background: linear-gradient(90deg, var(--gold-30), transparent);
}

.slant-band {
  height: 26px;
  margin-block: clamp(1.5rem, 3.6vw, 2.6rem);
  background: linear-gradient(90deg, var(--blue-24), rgba(216, 169, 74, .18) 58%, transparent);
  clip-path: polygon(0 62%, 100% 0, 100% 58%, 0 100%);
}

/* ---------- cards ---------- */
.stagger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: clamp(.9rem, 2vw, 1.4rem);
  align-items: start;
}

.stagger > :nth-child(even) {
  margin-top: clamp(12px, 2.4vw, 30px);
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--paper-10);
  padding: clamp(1rem, 2.2vw, 1.7rem);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.card:hover {
  border-color: var(--gold);
  box-shadow: 0 14px 32px -20px rgba(0, 0, 0, .95);
}

.card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .2em;
  color: var(--gold);
}

.card__title {
  margin-top: .45rem;
  font-size: 1.02rem;
  letter-spacing: .06em;
}

.card__text {
  margin-top: .5rem;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--paper-70);
}

/* ---------- tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .18rem .55rem;
  border: 1px solid var(--paper-22);
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .14em;
  color: var(--paper-70);
  white-space: nowrap;
}

.tag--gold { color: var(--gold); border-color: var(--gold-45); }
.tag--blue { color: var(--blue-lt); border-color: rgba(110, 168, 255, .45); }
.tag--lime { color: var(--lime); border-color: rgba(184, 224, 74, .45); }
.tag--alert {
  color: var(--paper);
  background: var(--magenta);
  border-color: var(--magenta);
}

/* ---------- filter ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-block: .6rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: .42rem;
  padding: .34rem .8rem;
  background: var(--card);
  border: 1px solid var(--paper-22);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--paper-70);
  transition:
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.filter-chip::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(242, 234, 217, .35);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.filter-chip:hover {
  border-color: var(--gold-45);
  color: var(--paper);
}

.filter-chip[aria-pressed="true"] {
  background: rgba(184, 224, 74, .12);
  border-color: var(--lime);
  color: var(--lime);
}

.filter-chip[aria-pressed="true"]::before {
  background: var(--lime);
  box-shadow: 0 0 6px rgba(184, 224, 74, .9);
}

[data-filtered="out"] { display: none !important; }

/* ---------- media frame ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--gold-30);
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 90% at 84% 10%, rgba(47, 111, 228, .34), transparent 58%),
    radial-gradient(90% 80% at 10% 94%, rgba(228, 63, 143, .24), transparent 60%),
    linear-gradient(160deg, #0E2A22, #07120F 64%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .65;
  background-image: repeating-linear-gradient(115deg, rgba(242, 234, 217, .06) 0 1px, transparent 1px 9px);
}

.media-frame > img,
.media-frame > picture > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: .45rem .7rem;
  background: rgba(7, 18, 15, .88);
  border-top: 1px solid var(--gold-30);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .header-nav__meta { display: none; }
  .footer-dock { grid-template-columns: 1fr 1fr; }
  .footer-dock__col:nth-child(n) { padding-top: 0; }
  .footer-dock__col:nth-child(even) { padding-top: 1.3rem; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .header-nav__inner {
    flex-wrap: wrap;
    gap: .5rem;
    padding-block: .55rem;
    min-height: 0;
  }

  .site-nav {
    flex-basis: 100%;
    display: none;
    max-height: 70vh;
    overflow-y: auto;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .3rem 0 .6rem;
  }

  .site-nav__link {
    display: block;
    width: 100%;
    padding: .62rem .2rem;
    font-size: .92rem;
    border-bottom: 1px solid rgba(242, 234, 217, .08);
  }

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

  .site-nav__link:hover {
    color: var(--gold);
    padding-left: .2rem;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--lime);
    border-left: 2px solid var(--lime);
    padding-left: .75rem;
  }

  .shell-axis { grid-template-columns: minmax(0, 1fr); }

  .index-axis {
    position: static;
    border-left: 0;
    border-top: 1px solid var(--gold-30);
    padding: .7rem 0 0;
    max-width: 100%;
  }

  .index-axis__label { display: none; }

  .index-axis__list {
    display: flex;
    gap: .5rem;
    overflow-x: auto;
    padding-bottom: .3rem;
    scrollbar-width: none;
  }

  .index-axis__list::-webkit-scrollbar { display: none; }

  .axis-link {
    flex: 0 0 auto;
    border: 1px solid var(--paper-22);
    padding: .32rem .7rem;
    white-space: nowrap;
  }

  .axis-link:hover { padding-left: .7rem; }

  .axis-link[aria-current="location"] { border-color: var(--lime); }
}

@media (max-width: 760px) {
  body { font-size: 15px; }

  .header-top__inner {
    flex-wrap: wrap;
    row-gap: .6rem;
    min-height: 0;
    padding-block: .72rem;
  }

  .brand-mark { flex: 1 1 auto; }

  .status-strip {
    order: 3;
    flex-basis: 100%;
    margin-left: 0;
    gap: .4rem;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: .1rem;
  }

  .status-strip::-webkit-scrollbar { display: none; }

  .header-actions { gap: .4rem; }

  .btn {
    padding: .52rem .78rem;
    font-size: .74rem;
    letter-spacing: .06em;
  }

  .footer-head__meta { margin-left: 0; flex-basis: 100%; }
  .footer-base__link { margin-left: 0; }
}

@media (max-width: 560px) {
  .footer-dock { grid-template-columns: 1fr; }
  .footer-dock__col:nth-child(even) { padding-top: 0; }
  .footer-base { font-size: .64rem; letter-spacing: .1em; }
  .brand-mark__sub { display: none; }
  .to-top { width: 40px; height: 40px; }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}