/* ============================================================
   SILVER RIVER INDEX / 澳门银诃品牌
   /assets/site.css — reset · tokens · masthead header · footer
   · shared components
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; padding: 0; }

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

body { min-height: 100vh; }

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

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

button { background: none; border: 0; cursor: pointer; }

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

ul, ol { list-style: none; }

:where(h1, h2, h3, h4, p, li, figure, figcaption, blockquote) { overflow-wrap: break-word; }

:where(section, article, [id]) { scroll-margin-top: 112px; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0E1418;
  --graphite: #1C252B;
  --smoke: #C9D2D6;
  --paper: #EEF1F2;
  --teal: #2BB3A3;
  --coral: #FF6F5E;
  --bronze: #B08D57;
  --deep-teal: #0F5E5A;
  --mist: #6F7C82;
  --warm: #F7F4EF;

  --line: rgba(201, 210, 214, 0.20);
  --line-soft: rgba(201, 210, 214, 0.10);
  --line-strong: rgba(176, 141, 87, 0.55);

  --maxw: 1440px;
  --gutter: clamp(18px, 4vw, 44px);
  --measure: 72ch;

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

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --shadow-deep: 0 22px 48px -32px #000;

  --header-pad: 22px;
}

/* ---------- 3. Base typography ---------- */
body {
  background-color: var(--ink);
  color: var(--smoke);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (min-width: 768px) { body { font-size: 17px; } }
@media (min-width: 1200px) { body { font-size: 18px; } }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

h1 {
  font-size: clamp(2.6rem, 6vw, 6rem);
  line-height: 1.06;
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  text-wrap: balance;
}

h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p { max-width: var(--measure); }

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

/* ---------- 4. Focus & motion ---------- */
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

#main-content:focus { outline: none; }
#main-content:focus-visible { outline: 2px solid var(--teal); outline-offset: -4px; }

/* ---------- 5. Layout containers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow {
  max-width: 880px;
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1200px) {
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---------- 6. Shared atoms ---------- */
.rule {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong), var(--line) 42%, transparent);
  margin-block: clamp(26px, 4vw, 46px);
}

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--teal);
  font-weight: 500;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 3px 9px;
  border: 1px solid var(--line);
  background: rgba(201, 210, 214, 0.05);
  color: var(--smoke);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.7;
  white-space: nowrap;
}

.tag--teal {
  border-color: rgba(43, 179, 163, 0.55);
  background: rgba(43, 179, 163, 0.10);
  color: var(--teal);
}

.tag--coral {
  border-color: rgba(255, 111, 94, 0.55);
  background: rgba(255, 111, 94, 0.10);
  color: var(--coral);
}

.tag--bronze {
  border-color: rgba(176, 141, 87, 0.60);
  background: rgba(176, 141, 87, 0.10);
  color: var(--bronze);
}

/* ---------- 7. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 0.75rem 1.35rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  line-height: 1.4;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:hover {
  border-color: var(--teal);
  color: var(--teal);
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
  font-weight: 500;
}

.btn--primary:hover {
  background: var(--deep-teal);
  border-color: var(--deep-teal);
  color: var(--warm);
}

.btn--ghost {
  border-color: var(--line);
  color: var(--smoke);
}

.btn--ghost:hover {
  border-color: var(--teal);
  background: rgba(43, 179, 163, 0.08);
  color: var(--teal);
}

.btn--quiet {
  padding: 0.35rem 0.2rem;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  color: var(--bronze);
}

.btn--quiet:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
  transform: none;
}

/* ---------- 8. Section head ---------- */
.section-head { margin-bottom: clamp(20px, 3vw, 32px); }

.section-head__eyebrow {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--bronze);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.22;
  color: var(--paper);
  text-wrap: balance;
}

/* ---------- 9. Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-strong);
}

.breadcrumb__link {
  color: var(--smoke);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

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

/* ---------- 10. Prose ---------- */
.prose {
  max-width: var(--measure);
  color: var(--smoke);
}

.prose p { margin-bottom: 1.05em; }
.prose p:last-child { margin-bottom: 0; }

.prose h2, .prose h3 {
  margin-block: 1.8em 0.6em;
  color: var(--paper);
}

.prose h2:first-child, .prose h3:first-child { margin-top: 0; }

.prose ul, .prose ol {
  margin-bottom: 1.05em;
  padding-left: 1.2em;
}

.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.35em; }

.prose--paper {
  color: #1d2529;
}

.prose--paper h2,
.prose--paper h3,
.prose--paper strong { color: var(--ink); }

/* ---------- 11. Media frames (image placeholders) ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--graphite);
  background-image:
    repeating-linear-gradient(135deg, rgba(201, 210, 214, 0.055) 0 1px, transparent 1px 14px),
    linear-gradient(158deg, #1C252B 0%, #131B20 58%, #0E1418 100%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(43, 179, 163, 0.12), transparent 48%, rgba(255, 111, 94, 0.12));
  mix-blend-mode: screen;
}

.media-frame img,
.media-frame picture,
.media-frame picture img,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.media-frame--tint {
  background-image:
    repeating-linear-gradient(135deg, rgba(43, 179, 163, 0.10) 0 1px, transparent 1px 16px),
    linear-gradient(158deg, #0F5E5A 0%, #17333A 55%, #0E1418 100%);
}

.media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 9px;
  background: rgba(14, 20, 24, 0.82);
  border-left: 2px solid var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.6;
}

/* ============================================================
   12. HEADER — magazine masthead with centred colophon
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  width: 100%;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 150% at 50% -40%, rgba(43, 179, 163, 0.16), transparent 62%),
    linear-gradient(180deg, #10181D 0%, #0E1418 100%);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-deep);
}

/* skip link */
.sr-skip {
  position: fixed;
  top: -96px;
  left: 16px;
  z-index: 200;
  padding: 0.7rem 1.1rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--bronze);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  transition: top 0.22s var(--ease);
}

.sr-skip:focus,
.sr-skip:focus-visible {
  top: 12px;
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* scroll progress */
.header-progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--teal) 0%, var(--bronze) 58%, var(--coral) 100%);
  transition: transform 0.12s linear;
  pointer-events: none;
  z-index: 2;
}

/* masthead */
.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: var(--header-pad) var(--gutter) 14px;
  text-align: center;
}

.masthead__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-height: 40px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--mist);
  transition: max-height 0.3s var(--ease), opacity 0.2s linear;
}

.masthead__dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--bronze);
  transform: rotate(45deg);
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.18rem;
  color: var(--paper);
}

.masthead__mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.6vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  color: var(--paper);
  transition: color 0.2s var(--ease), font-size 0.3s var(--ease);
}

.masthead__brand:hover .masthead__mark { color: var(--teal); }

.masthead__en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  text-transform: uppercase;
  color: var(--bronze);
}

.masthead__tagline {
  max-height: 32px;
  overflow: hidden;
  padding-top: 2px;
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.24em;
  color: var(--mist);
  transition: max-height 0.3s var(--ease), opacity 0.2s linear;
}

/* condensed state (JS: scroll > 32px) */
.site-header.is-condensed .masthead { padding: 10px var(--gutter) 8px; }

.site-header.is-condensed .masthead__eyebrow,
.site-header.is-condensed .masthead__tagline {
  max-height: 0;
  opacity: 0;
}

.site-header.is-condensed .masthead__mark {
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
}

.site-header.is-condensed .masthead__en { font-size: 9px; }

/* nav bar */
.nav-bar {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 0 var(--gutter);
  border-top: 1px solid var(--line);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 0;
  color: var(--paper);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--smoke);
  transition: transform 0.26s var(--ease), opacity 0.2s linear, background-color 0.2s linear;
}

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--smoke);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
  background: var(--coral);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
  background: var(--coral);
}

.site-header[data-open="true"] .nav-toggle__label { color: var(--coral); }

.primary-nav {
  display: none;
  flex-basis: 100%;
  order: 3;
  padding-bottom: 0.9rem;
}

.site-header[data-open="true"] .primary-nav {
  display: block;
  max-height: calc(100vh - 220px);
  overflow-y: auto;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
}

.nav-list__item { border-bottom: 1px solid var(--line-soft); }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.82rem 0;
  font-size: 15px;
  color: var(--smoke);
  transition: color 0.2s var(--ease);
}

.nav-link::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--line-strong);
  transform: rotate(45deg);
  transition: background-color 0.2s var(--ease);
}

.nav-link:hover { color: var(--paper); }
.nav-link:hover::before { background: var(--teal); }

.nav-link[aria-current="page"] {
  color: var(--teal);
  font-weight: 500;
}

.nav-link[aria-current="page"]::before { background: var(--coral); }

/* header CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 9px 15px;
  border: 1px solid var(--line-strong);
  color: var(--bronze);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.header-cta__mark {
  width: 6px;
  height: 6px;
  background: var(--teal);
  transform: rotate(45deg);
  transition: background-color 0.2s var(--ease);
}

.header-cta:hover {
  border-color: var(--teal);
  background: rgba(43, 179, 163, 0.10);
  color: var(--teal);
  transform: translateY(-1px);
}

.header-cta:hover .header-cta__mark { background: var(--coral); }

/* header > tablet & desktop */
@media (min-width: 900px) {
  .masthead { padding: 30px var(--gutter) 18px; }

  .nav-bar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 0;
  }

  .nav-toggle { display: none; }

  .primary-nav {
    grid-column: 2;
    flex-basis: auto;
    order: 0;
    padding-bottom: 0;
  }

  .site-header[data-open="true"] .primary-nav { display: block; }

  .nav-list {
    flex-direction: row;
    width: auto;
  }

  .nav-list__item { border-bottom: 0; }

  .nav-link {
    position: relative;
    display: block;
    padding: 15px 18px;
    font-size: 14.5px;
    letter-spacing: 0.08em;
    color: var(--smoke);
  }

  .nav-link::before { display: none; }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 9px;
    height: 1px;
    background: var(--teal);
    transform: scaleX(0);
    transform-origin: 0 50%;
    transition: transform 0.28s var(--ease), background-color 0.2s var(--ease);
  }

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

  .nav-link[aria-current="page"] { color: var(--paper); font-weight: 500; }
  .nav-link[aria-current="page"]::after {
    transform: scaleX(1);
    background: var(--coral);
  }

  .header-cta {
    grid-column: 3;
    justify-self: end;
  }
}

/* ============================================================
   13. FOOTER — colophon page
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  color: var(--smoke);
  background-color: var(--ink);
  background-image:
    radial-gradient(90% 130% at 10% 0%, rgba(15, 94, 90, 0.30), transparent 62%),
    linear-gradient(180deg, #0B1014 0%, #0E1418 46%, #0A0F12 100%);
  border-top: 1px solid var(--line-strong);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(201, 210, 214, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 210, 214, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  padding-block: clamp(40px, 6vw, 72px);
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1.5fr; }
}

/* brand block */
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-brand__mark {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  color: var(--paper);
}

.footer-brand__cn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.15;
  letter-spacing: 0.1em;
  text-indent: 0.1em;
  transition: color 0.2s var(--ease);
}

.footer-brand__mark:hover .footer-brand__cn { color: var(--teal); }

.footer-brand__en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
  text-transform: uppercase;
  color: var(--bronze);
}

.footer-brand__note {
  max-width: 34ch;
  margin-block: 14px 20px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--mist);
}

.footer-back {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  color: var(--bronze);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-back__mark {
  width: 6px;
  height: 6px;
  background: var(--coral);
  transform: rotate(45deg);
  transition: background-color 0.2s var(--ease);
}

.footer-back:hover {
  border-color: var(--teal);
  background: rgba(43, 179, 163, 0.10);
  color: var(--teal);
  transform: translateY(-1px);
}

.footer-back:hover .footer-back__mark { background: var(--teal); }

/* columns */
.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-col__title {
  width: 100%;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--bronze);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  width: 100%;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--smoke);
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: color 0.2s var(--ease), background-size 0.28s var(--ease);
}

.footer-link:hover {
  color: var(--teal);
  background-size: 100% 1px;
}

/* contact column */
.footer-col--contact { width: 100%; }

.footer-contact {
  display: grid;
  justify-items: start;
  gap: 2px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(201, 210, 214, 0.14);
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  line-height: 1.75;
  color: var(--paper);
  word-break: break-word;
}

.copy-btn {
  margin-top: 5px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--smoke);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.copy-btn:hover {
  border-color: var(--teal);
  background: rgba(43, 179, 163, 0.10);
  color: var(--teal);
}

.copy-btn[data-copy-state="done"] {
  border-color: var(--teal);
  background: rgba(43, 179, 163, 0.14);
  color: var(--teal);
}

.copy-btn[data-copy-state="fail"] {
  border-color: var(--coral);
  background: rgba(255, 111, 94, 0.12);
  color: var(--coral);
}

.footer-contact__note {
  max-width: 34ch;
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* bottom bar */
.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
}

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px;
}

.footer-copy,
.footer-legal {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.75;
  color: var(--mist);
}

.footer-legal { color: var(--bronze); }

/* ============================================================
   14. 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;
    scroll-behavior: auto !important;
  }

  .btn:hover,
  .header-cta:hover,
  .footer-back:hover { transform: none; }
}