/* =========================================================
   头头体育手机版 · Site Kit
   /assets/site.css — reset / tokens / typography / header / footer / base components
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  --ice-night: #071A2B;
  --polar-night: #0E2A44;
  --rink-blue: #174A6B;
  --cream: #F2EDE4;
  --snow: #FBF8F2;
  --rock: #66727A;
  --moss: #7C8C6A;
  --clay: #B66B4A;
  --flare: #F04A2A;
  --flare-ink: #A0381D;
  --ember: #FF7A3D;
  --mint: #35F2C2;
  --ink: #101418;

  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;

  --shell: 1180px;
  --gutter: clamp(1rem, 4vw, 3rem);
  --header-h: 74px;

  --shadow-hard: 6px 6px 0 rgba(7, 26, 43, 0.55);
  --shadow-hard-light: 6px 6px 0 rgba(16, 20, 24, 0.14);
  --line-soft: rgba(242, 237, 228, 0.22);
  --line-ink: rgba(16, 20, 24, 0.18);
  --radius: 6px;

  --dur: 180ms;
  --dur-fast: 130ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background-color: var(--ice-night);
  color: var(--snow);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol, form { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
hr { border: 0; }

::selection { background-color: var(--flare); color: var(--ice-night); }

:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
  border-radius: 2px;
}
.section--cream :focus-visible,
.panel--cream :focus-visible { outline-color: var(--flare); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 3. Layout primitives ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.5rem, 6vw, 5rem); }
.section--deep { background-color: var(--ice-night); color: var(--snow); }
.section--rink { background-color: var(--rink-blue); color: var(--snow); }
.section--cream { background-color: var(--cream); color: var(--ink); }
.section--cream a { color: inherit; }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(1.25rem, 3vw, 2.25rem);
}

.page-offset { padding-top: calc(var(--header-h) + clamp(1.75rem, 4vw, 3rem)); }

.stack { display: flex; flex-direction: column; gap: clamp(0.75rem, 2vw, 1.25rem); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; }

.rule {
  height: 3px;
  border: 0;
  background-image: repeating-linear-gradient(90deg, var(--flare) 0 18px, transparent 18px 30px);
  opacity: 0.85;
}

/* ---------- 4. Typography ---------- */
.display,
.h-page,
.h-section,
.h-sub {
  font-family: var(--font-display);
  color: inherit;
  text-wrap: balance;
}

.display {
  font-size: clamp(2.4rem, 5.4vw, 4.6rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.h-page {
  font-size: clamp(2rem, 3.4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.h-section {
  font-size: clamp(1.4rem, 2.2vw, 1.9rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.h-sub {
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.8;
  max-width: 62ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--flare);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 3px;
  background-color: currentColor;
  flex: 0 0 auto;
}
.section--cream .eyebrow,
.panel--cream .eyebrow { color: var(--flare-ink); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 5. Buttons ---------- */
.c-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.55rem 1.15rem;
  border: 2px solid transparent;
  border-radius: 5px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-align: center;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease),
              background-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}

.c-btn--flare {
  background-color: var(--flare);
  color: var(--ice-night);
  border-color: var(--ice-night);
  box-shadow: 4px 4px 0 rgba(7, 26, 43, 0.6);
}
.c-btn--flare:hover {
  background-color: var(--ember);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(7, 26, 43, 0.6);
}
.c-btn--flare:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(7, 26, 43, 0.6);
}

.c-btn--ghost {
  background-color: transparent;
  color: var(--snow);
  border-color: rgba(242, 237, 228, 0.5);
  box-shadow: 4px 4px 0 rgba(7, 26, 43, 0.35);
}
.c-btn--ghost:hover {
  color: var(--mint);
  border-color: var(--mint);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(7, 26, 43, 0.45);
}

.c-btn--dark {
  background-color: var(--ice-night);
  color: var(--snow);
  border-color: var(--ice-night);
  box-shadow: 4px 4px 0 rgba(182, 107, 74, 0.5);
}
.c-btn--dark:hover {
  background-color: var(--polar-night);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(182, 107, 74, 0.55);
}

.c-btn--sm {
  min-height: 38px;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
}

/* ---------- 6. Tags & status ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border: 1.5px solid currentColor;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.5;
}
.tag--flare { color: var(--flare); }
.tag--mint { color: var(--mint); }
.tag--moss { color: var(--moss); }
.tag--clay { color: var(--clay); }
.tag--ink { color: var(--ink); }
.section--cream .tag--flare,
.panel--cream .tag--flare { color: var(--flare-ink); }
.section--cream .tag--mint,
.panel--cream .tag--mint { color: #12664F; }

.status-dot {
  position: relative;
  display: inline-block;
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--mint);
  box-shadow: 0 0 0 3px rgba(53, 242, 194, 0.18);
}
.status-dot--live::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px solid rgba(53, 242, 194, 0.55);
  animation: dot-pulse 2.4s ease-out infinite;
}
@keyframes dot-pulse {
  0% { transform: scale(0.6); opacity: 0.9; }
  70% { transform: scale(1.5); opacity: 0; }
  100% { transform: scale(1.5); opacity: 0; }
}

/* ---------- 7. Panels (Bento) ---------- */
.panel {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.5rem);
  background-color: var(--polar-night);
  color: var(--snow);
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}
.panel--rink { background-color: var(--rink-blue); border-color: rgba(242, 237, 228, 0.3); }
.panel--cream {
  background-color: var(--cream);
  color: var(--ink);
  border-color: var(--line-ink);
  box-shadow: var(--shadow-hard-light);
}
.panel--focus {
  border-color: var(--flare);
  box-shadow: 8px 8px 0 rgba(240, 74, 42, 0.28);
}
.panel--interactive {
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.panel--interactive:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 rgba(7, 26, 43, 0.6);
  border-color: rgba(53, 242, 194, 0.45);
}
.panel__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}
.panel--cream .panel__label { color: var(--clay); }
.panel__title {
  margin-top: 0.35rem;
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.panel__body {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: rgba(251, 248, 242, 0.78);
}
.panel--cream .panel__body { color: rgba(16, 20, 24, 0.78); }
.panel__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ---------- 8. Grid helpers ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(0.75rem, 1.6vw, 1.25rem);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

/* ---------- 9. Breadcrumbs ---------- */
.breadcrumbs { margin-bottom: 1.25rem; }
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.breadcrumbs__item { display: inline-flex; align-items: center; gap: 0.35rem; }
.breadcrumbs__link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: inherit;
  opacity: 0.7;
  border-bottom: 1px solid transparent;
  transition: opacity var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.breadcrumbs__link:hover { opacity: 1; border-bottom-color: var(--flare); }
.breadcrumbs__sep { opacity: 0.45; }
.breadcrumbs__current {
  color: var(--flare);
  font-weight: 700;
}
.section--cream .breadcrumbs__current { color: var(--flare-ink); }

/* ---------- 10. Media frames ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--line-soft);
  border-radius: var(--radius);
  background-image: linear-gradient(135deg, var(--rink-blue), var(--ice-night) 70%);
  aspect-ratio: 16 / 9;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}
.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.6rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.5;
  color: rgba(251, 248, 242, 0.92);
  background-image: linear-gradient(0deg, rgba(7, 26, 43, 0.92), rgba(7, 26, 43, 0));
}
.media-frame__badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  padding: 0.15rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ice-night);
  background-color: var(--mint);
  border-radius: 3px;
}
.section--cream .media-frame { border-color: var(--line-ink); }
.section--cream .media-frame__caption { background-image: linear-gradient(0deg, rgba(16, 20, 24, 0.85), rgba(16, 20, 24, 0)); }

/* ---------- 11. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 0.6rem 1rem;
  background-color: var(--snow);
  color: var(--ice-night);
  border: 2px solid var(--ice-night);
  border-radius: 4px;
  font-weight: 800;
  font-size: 0.9rem;
  transform: translateY(-180%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: 3px;
}

/* ---------- 12. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: transparent;
  color: var(--snow);
  border-bottom: 2px solid transparent;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.site-header.is-solid,
.site-header[data-open] {
  background-color: var(--polar-night);
  border-bottom-color: rgba(242, 237, 228, 0.18);
  box-shadow: 0 10px 0 rgba(7, 26, 43, 0.28);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--flare), var(--ember) 55%, var(--mint));
  will-change: transform;
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.6vw, 1.6rem);
  min-height: var(--header-h);
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  padding-block: 0.35rem;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background-color: var(--flare);
  color: var(--ice-night);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1;
  border: 2px solid var(--snow);
  border-radius: 4px;
  transform: rotate(-6deg);
  box-shadow: 4px 4px 0 rgba(53, 242, 194, 0.35);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  transform: rotate(0deg) translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(53, 242, 194, 0.45);
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand__name {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--snow);
}
.brand__edition {
  padding: 0.12rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--mint);
  border: 1.5px solid var(--mint);
  border-radius: 3px;
}
.brand__tagline {
  margin-top: 0.2rem;
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  color: rgba(242, 237, 228, 0.62);
}

/* Header status chip */
.header-status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex: 0 0 auto;
  padding: 0.25rem 0.5rem;
  font-size: 0.72rem;
  color: var(--mint);
  border: 1.5px dashed rgba(53, 242, 194, 0.45);
  border-radius: 4px;
  white-space: nowrap;
}

/* Nav */
.site-nav { margin-left: auto; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 1.5vw, 1.3rem);
}
.site-nav__item { display: block; }
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 0.15rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(251, 248, 242, 0.82);
  transition: color var(--dur-fast) var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 8px;
  width: 100%;
  height: 2px;
  background-color: var(--flare);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav__link:hover { color: var(--snow); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] {
  color: var(--snow);
  font-weight: 800;
}
.site-nav__link[aria-current="page"]::after {
  height: 3px;
  transform: scaleX(1);
}
.site-nav__item--cta { display: none; }

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

/* Toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.35rem 0.6rem;
  color: var(--snow);
  border: 2px solid rgba(242, 237, 228, 0.35);
  border-radius: 5px;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.nav-toggle:hover { color: var(--flare); border-color: var(--flare); }
.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 20px;
}
.nav-toggle__bars span {
  display: block;
  height: 2px;
  background-color: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle__label {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) 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(-6px) rotate(-45deg); }

/* ---------- 13. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--ice-night);
  color: var(--snow);
  border-top: 3px solid var(--flare);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(242, 237, 228, 0.055) 0 1px, transparent 1px 14px);
}
.site-footer__inner {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(2.25rem, 5vw, 4rem) var(--gutter) 1.75rem;
}
.site-footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 2fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding-left: 1rem;
  border-left: 3px solid var(--flare);
}
.footer-brand__line {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--snow);
}
.footer-brand__note {
  max-width: 34ch;
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(242, 237, 228, 0.66);
}
.footer-status {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
  color: var(--mint);
  background-color: rgba(53, 242, 194, 0.06);
  border: 1.5px solid rgba(53, 242, 194, 0.35);
  border-radius: 4px;
}
.footer-status__sep { color: rgba(242, 237, 228, 0.4); }

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2.5vw, 2rem);
}
.footer-col__title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--moss);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.footer-col__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  font-size: 0.92rem;
  color: rgba(251, 248, 242, 0.85);
  transition: color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.footer-col__link::before {
  content: "";
  width: 10px;
  height: 2px;
  flex: 0 0 auto;
  background-color: var(--flare);
  transition: width var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.footer-col__link:hover { color: var(--mint); transform: translateX(2px); }
.footer-col__link:hover::before { width: 18px; background-color: var(--mint); }

.footer-col__item {
  padding-block: 0.25rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(242, 237, 228, 0.72);
}
.footer-col__item--mono {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: rgba(242, 237, 228, 0.6);
}

/* Copy chips */
.copy-chip {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: 100%;
  min-height: 44px;
  padding: 0.3rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--snow);
  background-color: rgba(23, 74, 107, 0.55);
  border: 2px solid rgba(242, 237, 228, 0.22);
  border-radius: 4px;
  overflow-wrap: anywhere;
  transition: border-color var(--dur-fast) var(--ease),
              background-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.copy-chip:hover {
  border-color: var(--mint);
  background-color: rgba(23, 74, 107, 0.9);
  transform: translateY(-1px);
}
.copy-chip__hint {
  padding-left: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mint);
  border-left: 1px solid rgba(242, 237, 228, 0.25);
}
.copy-chip[data-copied="true"] {
  border-color: var(--mint);
  background-color: rgba(53, 242, 194, 0.14);
}
.copy-chip[data-copied="true"] .copy-chip__hint {
  padding: 0.05rem 0.3rem;
  color: var(--ice-night);
  background-color: var(--mint);
  border-left: 0;
  border-radius: 2px;
}

/* Footer bottom */
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-top: 1.25rem;
  border-top: 2px solid rgba(242, 237, 228, 0.16);
  font-size: 0.78rem;
  color: rgba(242, 237, 228, 0.6);
}
.site-footer__copyright {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
}
.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}
.site-footer__legal .footer-col__link {
  min-height: 36px;
  font-size: 0.78rem;
}
.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: rgba(242, 237, 228, 0.55);
}

/* ---------- 14. Responsive ---------- */
@media (max-width: 1180px) {
  .header-status { display: none; }
}

@media (max-width: 1024px) {
  .site-footer__top { grid-template-columns: 1fr; }
  .footer-brand { border-left-width: 3px; }
}

@media (max-width: 860px) {
  :root { --header-h: 64px; }

  .site-header__inner { gap: 0.6rem; }
  .site-header__cta { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin-left: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 0.5rem var(--gutter) 1.5rem;
    background-color: var(--polar-night);
    border-bottom: 3px solid var(--flare);
    box-shadow: 0 16px 0 rgba(7, 26, 43, 0.35);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
  }
  .site-header[data-open] .site-nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .site-nav__item { border-bottom: 1px solid rgba(242, 237, 228, 0.14); }
  .site-nav__link {
    width: 100%;
    min-height: 52px;
    justify-content: space-between;
    padding-inline: 0.15rem;
    font-size: 1rem;
  }
  .site-nav__link::after { bottom: 0; }
  .site-nav__item--cta {
    display: block;
    margin-top: 1rem;
    border-bottom: 0;
  }
  .site-nav__item--cta .c-btn { width: 100%; }

  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5 { grid-column: span 2; }
  .col-6, .col-7, .col-8, .col-9, .col-12 { grid-column: span 4; }
}

@media (max-width: 560px) {
  :root { --header-h: 60px; }

  .brand__mark { width: 32px; height: 32px; font-size: 1rem; }
  .brand__name { font-size: 0.98rem; }
  .brand__tagline { display: none; }
  .brand__edition { font-size: 0.56rem; letter-spacing: 0.08em; }
  .nav-toggle__label { display: none; }

  .footer-cols { grid-template-columns: 1fr; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }
  .site-footer__legal { gap: 0.25rem 1rem; }

  .grid-12 { grid-template-columns: 1fr; }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 { grid-column: span 1; }

  .c-btn { width: 100%; }
  .site-nav__item--cta .c-btn { width: 100%; }
  .copy-chip { font-size: 0.76rem; }
}

/* ---------- 15. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .status-dot--live::after { display: none; }
  .panel--interactive:hover { transform: none; }
  .c-btn--flare:hover,
  .c-btn--ghost:hover,
  .c-btn--dark:hover { transform: none; }
  .brand:hover .brand__mark { transform: rotate(-6deg); }
}