/* ==========================================================================
   亚洲版体育看台 — 共享站点样式 /assets/site.css
   01 reset  02 tokens  03 base type  04 focus
   05 shell & grid  06 masthead  07 nav  08 round strip
   09 primitives  10 lists & tables  11 image frames
   12 prose  13 footer  14 script-injected  15 utilities & motion
   ========================================================================== */

/* ---------- 01 reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, dt {
  margin: 0;
}

ul, ol { margin: 0; padding: 0; }
img, svg, video { max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }

[hidden] { display: none !important; }

/* ---------- 02 tokens ---------- */
:root {
  --ink-900: #0B1224;
  --ink-800: #111C36;
  --ink-700: #1A2A4A;
  --ink-600: #26355A;
  --ink-500: #2A3A6B;

  --grass: #17A45C;
  --grass-lite: #6EE7A8;
  --alert: #FF5A36;
  --gold: #D8B26A;
  --gold-lite: #F0D8A0;

  --paper: #F4F7FB;
  --muted: #A8B4C8;
  --muted-dim: rgba(168, 180, 200, 0.62);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", "Noto Sans Mono", "Courier New", monospace;

  --shell: 1180px;
  --measure: 38rem;

  --sp-1: 8px;
  --sp-2: 14px;
  --sp-3: 22px;
  --sp-4: 34px;
  --sp-5: 54px;

  --line: 1px solid var(--ink-600);
  --t-fast: 0.2s;
  --t-mid: 0.28s;
}

/* ---------- 03 base type ---------- */
body {
  min-height: 100%;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1180px 620px at 50% -220px, rgba(42, 58, 107, 0.55), transparent 72%),
    radial-gradient(900px 520px at 104% 100%, rgba(23, 164, 92, 0.08), transparent 66%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--paper);
}

a { text-decoration: none; }
small { font-size: 0.85em; }
strong { font-weight: 700; }
em { font-style: italic; }

/* ---------- 04 focus ---------- */
:focus-visible {
  outline: 2px solid var(--gold-lite);
  outline-offset: 3px;
  border-radius: 1px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute;
  inset-inline-start: 50%;
  inset-block-start: -140px;
  transform: translateX(-50%);
  z-index: 120;
  padding: 10px 18px;
  background: var(--gold-lite);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  transition: inset-block-start var(--t-fast) linear;
}
.skip-link:focus { inset-block-start: 8px; }

/* ---------- 05 shell & grid ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 40px);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 30px); grid-template-columns: minmax(0, 1fr); }

@media (min-width: 900px) {
  .grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
  .grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
  .grid--3-6-3 { grid-template-columns: minmax(0, 3fr) minmax(0, 6fr) minmax(0, 3fr); }
}

.stack > * + * { margin-top: var(--sp-3); }
.rule { height: 1px; border: 0; background: var(--ink-600); margin-block: var(--sp-3); }

/* ---------- 06 masthead ---------- */
.masthead {
  position: relative;
  border-bottom: var(--line);
  background-color: transparent;
}

.masthead__field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(680px 240px at 50% 0%, rgba(216, 178, 106, 0.16), transparent 74%),
    radial-gradient(540px 280px at 10% 6%, rgba(23, 164, 92, 0.15), transparent 72%),
    radial-gradient(540px 280px at 92% 2%, rgba(255, 90, 54, 0.11), transparent 74%),
    linear-gradient(180deg, rgba(42, 58, 107, 0.46), rgba(11, 18, 36, 0) 82%);
}

.masthead__field::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(244, 247, 251, 0.05) 0 1px,
    transparent 1px 24px
  );
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.masthead__inner {
  position: relative;
  text-align: center;
  padding-block: clamp(26px, 5vw, 54px) clamp(12px, 2vw, 20px);
}

.masthead__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: clamp(10px, 1.8vw, 16px);
}

.masthead__brand { display: inline-block; }

.masthead__brand-mark {
  display: block;
  font-size: clamp(30px, 6.2vw, 58px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.masthead__brand::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: clamp(10px, 1.6vw, 14px);
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.masthead__brand:hover .masthead__brand-mark { color: var(--gold-lite); }

.masthead__tagline {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.masthead__bar {
  display: none;
  position: relative;
  justify-content: center;
  padding-block: 0 14px;
}

/* ---------- 07 nav ---------- */
.nav {
  position: relative;
  border-top: var(--line);
  background: rgba(11, 18, 36, 0.4);
}

.nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__item { display: flex; }

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.55em;
  padding: clamp(11px, 1.4vw, 15px) clamp(10px, 1.7vw, 21px);
  color: var(--muted);
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: color var(--t-fast) linear;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: clamp(10px, 1.7vw, 21px);
  right: clamp(10px, 1.7vw, 21px);
  bottom: 7px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) linear;
}

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

.nav__name { display: inline-block; }

.nav__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted-dim);
  transition: color var(--t-fast) linear;
}

.nav__link[aria-current="page"] { color: var(--gold-lite); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] .nav__index { color: var(--gold); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  border: var(--line);
  background: rgba(17, 28, 54, 0.7);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: border-color var(--t-fast) linear, color var(--t-fast) linear;
}
.nav-toggle:hover { border-color: var(--gold); color: var(--gold-lite); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: var(--gold);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--gold);
  transition: transform var(--t-fast) linear;
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

@media (max-width: 899px) {
  .nav__list { flex-direction: column; align-items: stretch; padding-block: 6px 14px; }
  .nav__item + .nav__item { border-top: var(--line); }
  .nav__link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 14px 2px;
    font-size: 16px;
  }
  .nav__link::after { display: none; }
  .nav__link[aria-current="page"] {
    border-inline-start: 2px solid var(--gold);
    padding-inline-start: 12px;
  }
  .js .nav { display: none; }
  .js .nav[data-open] { display: block; }
}

@media (min-width: 900px) {
  .nav { display: block !important; }
}

/* ---------- 08 round strip ---------- */
.round-strip {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  border-top: var(--line);
  background: rgba(17, 28, 54, 0.94);
  -webkit-backdrop-filter: blur(7px);
  backdrop-filter: blur(7px);
}

.round-strip__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-block: 9px;
}

.round-strip__jump {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 4px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--t-fast) linear;
}
.js .round-strip__jump { display: inline-flex; }
.round-strip__jump:hover { color: var(--gold-lite); }

.round-strip__dot {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grass);
  box-shadow: 0 0 0 3px rgba(23, 164, 92, 0.18);
  animation: stripPulse 2.8s linear infinite;
}

@keyframes stripPulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(23, 164, 92, 0.18); }
  50% { box-shadow: 0 0 0 6px rgba(23, 164, 92, 0.06); }
}

.round-strip__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px clamp(14px, 3vw, 34px);
  margin: 0;
}

.round-strip__fact {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
}

.round-strip__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-dim);
}

.round-strip__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
}

/* ---------- 09 primitives ---------- */
.label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.01em;
}

.score {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--paper);
}
.score--alert { color: var(--alert); }

.jersey {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.72em 1.2em;
  border: var(--line);
  background: rgba(17, 28, 54, 0.68);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  line-height: 1.2;
  cursor: pointer;
  transition: border-color var(--t-fast) linear, color var(--t-fast) linear,
    background-color var(--t-fast) linear;
}
.btn:hover,
.btn:focus-visible { border-color: var(--gold); color: var(--gold-lite); }

.btn--gold { border-color: rgba(216, 178, 106, 0.72); color: var(--gold-lite); }
.btn--gold:hover { background: rgba(216, 178, 106, 0.13); }

.btn--grass { border-color: rgba(23, 164, 92, 0.72); color: var(--grass-lite); }
.btn--grass:hover { background: rgba(23, 164, 92, 0.15); }

.btn--block { width: 100%; justify-content: center; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.42em 0.9em;
  border: var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color var(--t-fast) linear, border-color var(--t-fast) linear,
    background-color var(--t-fast) linear;
}
.chip:hover { color: var(--paper); border-color: var(--ink-500); }
.chip[aria-pressed="true"] {
  color: var(--ink-900);
  background: var(--gold-lite);
  border-color: var(--gold-lite);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-bar__count {
  margin-inline-start: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.panel {
  position: relative;
  padding: clamp(16px, 2.2vw, 26px);
  border: var(--line);
  background: linear-gradient(180deg, rgba(26, 42, 74, 0.56), rgba(11, 18, 36, 0.32));
}
.panel--flat { background: var(--ink-800); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 20px;
  padding-bottom: 12px;
  margin-bottom: var(--sp-3);
  border-bottom: var(--line);
}

/* ---------- 10 lists & tables ---------- */
.rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--line);
}

.row {
  position: relative;
  padding: clamp(12px, 1.8vw, 18px) 0 clamp(12px, 1.8vw, 18px) clamp(12px, 2vw, 20px);
  border-bottom: var(--line);
}

.row::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 1px;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--t-mid) linear;
}
.row:hover::before,
.row:focus-within::before { transform: scaleY(1); }

.row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 6px;
}

.row__title {
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 700;
  line-height: 1.4;
}
.row__title a { border-bottom: 1px solid transparent; transition: border-color var(--t-fast) linear; }
.row__title a:hover { border-bottom-color: var(--gold); }

.table-scroll { width: 100%; overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.table th,
.table td {
  text-align: left;
  padding: 11px 14px;
  border-bottom: var(--line);
  white-space: nowrap;
}

.table thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.table tbody tr:nth-child(even) { background: rgba(26, 42, 74, 0.34); }
.table tbody td.num { color: var(--paper); }

/* ---------- 11 image frames ---------- */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--line);
  background: linear-gradient(160deg, var(--ink-700), var(--ink-900) 72%);
}

.image-frame > img,
.image-frame > svg,
.image-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(115deg, rgba(244, 247, 251, 0.045) 0 1px, transparent 1px 20px),
    linear-gradient(180deg, rgba(11, 18, 36, 0) 42%, rgba(11, 18, 36, 0.74));
}

.image-frame--noscan::after { background: none; }

.image-frame--16x9 { aspect-ratio: 16 / 9; }
.image-frame--3x2 { aspect-ratio: 3 / 2; }
.image-frame--1x1 { aspect-ratio: 1 / 1; }
.image-frame--3x4 { aspect-ratio: 3 / 4; }

.image-frame[data-cut] { clip-path: polygon(0 0, 100% 0, 100% 93%, 0 100%); }
.image-frame[data-cut-up] { clip-path: polygon(0 7%, 100% 0, 100% 100%, 0 100%); }

.image-frame__tag {
  position: absolute;
  inset-inline-start: 12px;
  inset-block-end: 10px;
  z-index: 1;
  padding: 3px 9px;
  border: var(--line);
  background: rgba(11, 18, 36, 0.78);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--paper);
}

/* ---------- 12 prose ---------- */
.prose {
  max-width: var(--measure);
  color: var(--paper);
  font-size: 16.5px;
}

.prose > * + * { margin-top: var(--sp-3); }

.prose p { line-height: 1.82; }

.prose h2 {
  font-size: clamp(20px, 2.6vw, 26px);
  margin-top: var(--sp-5);
}

.prose h3 {
  font-size: clamp(17px, 2vw, 20px);
  margin-top: var(--sp-4);
}

.prose a {
  color: var(--grass-lite);
  border-bottom: 1px solid rgba(110, 231, 168, 0.34);
  transition: border-color var(--t-fast) linear;
}
.prose a:hover { border-bottom-color: var(--grass-lite); }

.prose ul,
.prose ol { padding-inline-start: 1.25em; }
.prose li + li { margin-top: 6px; }

.prose blockquote {
  padding-inline-start: 16px;
  border-inline-start: 2px solid var(--gold);
  color: var(--muted);
}

.prose blockquote cite {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: italic;
  letter-spacing: 0.06em;
}

/* ---------- 13 footer ---------- */
.site-foot {
  margin-top: clamp(44px, 7vw, 96px);
  border-top: var(--line);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900) 84%);
}

.site-foot__mast {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 20px;
  padding-block: clamp(28px, 4vw, 46px) var(--sp-3);
  border-bottom: var(--line);
}

.site-foot__brand {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 900;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.site-foot__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.site-foot__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  padding-block: var(--sp-4);
}

@media (min-width: 720px) {
  .site-foot__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.site-foot__title {
  margin-bottom: var(--sp-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.site-foot__list {
  list-style: none;
  display: grid;
  gap: 9px;
}

.site-foot__list a {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  color: var(--muted);
  font-size: 14.5px;
  transition: color var(--t-fast) linear;
}

.site-foot__list a::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-end: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) linear;
}

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

.site-foot__facts {
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 14px;
}

.site-foot__key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-dim);
}

.site-foot__val { color: var(--paper); word-break: break-word; }

.site-foot__hint {
  margin-top: var(--sp-2);
  padding-top: var(--sp-2);
  border-top: var(--line);
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.7;
}

.site-foot__base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-block: var(--sp-3) var(--sp-4);
  border-top: var(--line);
}

.site-foot__copy {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted-dim);
}

/* ---------- 14 script-injected ---------- */
.progress-rail {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: 90;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--grass), var(--gold), var(--alert));
  transition: width 0.1s linear;
}

.to-top {
  position: fixed;
  inset-inline-end: clamp(14px, 3vw, 28px);
  inset-block-end: clamp(14px, 3vw, 28px);
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: var(--line);
  background: rgba(11, 18, 36, 0.92);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--t-mid) linear, transform var(--t-mid) linear,
    visibility var(--t-mid), color var(--t-fast) linear, border-color var(--t-fast) linear;
}
.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--gold-lite); border-color: var(--gold); }

/* ---------- 15 utilities & motion ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(10px);
}
.js .reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s linear, transform 0.55s linear;
}

.toc {
  list-style: none;
  display: grid;
  gap: 2px;
  border-inline-start: 1px solid var(--ink-600);
  padding-inline-start: var(--sp-2);
}

.toc a {
  display: block;
  padding: 6px 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  transition: color var(--t-fast) linear, padding-inline-start var(--t-fast) linear;
}

.toc a:hover { color: var(--paper); }

.toc a.is-active,
.toc a[aria-current="true"] {
  color: var(--gold-lite);
  padding-inline-start: 8px;
  border-inline-start: 1px solid var(--gold);
  margin-inline-start: -1px;
}

@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;
  }

  .js .reveal { opacity: 1; transform: none; }
  .to-top { transform: none; }
  .round-strip__dot { animation: none; }
}