/* ===========================================================
   ballking-club.com.cn — shared site kit
   /assets/site.css : reset / tokens / shell / base components
   =========================================================== */

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd,dt{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
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%}
[hidden]{display:none !important}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- tokens ---------- */
:root{
  /* palette */
  --ink:#070B0A;
  --deep:#0E1513;
  --stand:#10312A;
  --turf:#16443A;
  --cyan:#35F2D6;
  --mist:#A8FFF0;
  --signal:#FF5A2B;
  --paper:#F4F7F5;
  --paper-ink:#5C6B67;
  --paper-line:#C9D2CE;
  --dark-ink:#D5E3DF;

  /* type */
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:var(--font-display);
  --font-mono:ui-monospace,"Roboto Mono",SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  /* metrics */
  --rail-w:132px;
  --header-h:56px;
  --container:1240px;
  --gap:24px;
  --cut:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:240ms;
  --split-left:36%;
}

/* ---------- base ---------- */
body{
  background:var(--ink);
  color:var(--dark-ink);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  min-height:100vh;
  padding-top:var(--header-h);
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--cyan);color:var(--ink)}

h1,h2,h3{font-family:var(--font-display);font-weight:900;line-height:1.08;letter-spacing:.01em;color:var(--paper)}
h1{font-size:clamp(2.6rem,6vw,5rem);line-height:1.05}
h2{font-size:clamp(1.8rem,3.4vw,2.8rem)}
h3{font-size:1.25rem;line-height:1.4}
strong{color:var(--paper);font-weight:700}
code,kbd,samp{font-family:var(--font-mono);font-size:.86em;color:var(--mist)}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(18px,4vw,48px)}
.section{padding:clamp(48px,8vw,110px) clamp(18px,4vw,48px)}
.section--paper{background:var(--paper);color:var(--paper-ink)}
.section--paper h2,.section--paper h3{color:var(--ink)}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:120;
  display:inline-block;padding:10px 16px;
  background:var(--cyan);color:var(--ink);
  font-size:.82rem;font-weight:700;letter-spacing:.08em;
  transform:translateY(-200%);
  transition:transform 180ms var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ===========================================================
   HEADER — mobile first
   =========================================================== */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 14px;
  background:rgba(14,21,19,.96);
  border-bottom:1px solid var(--turf);
  z-index:90;
}
.site-header::before{
  content:"";
  position:fixed;inset:0;
  background:rgba(7,11,10,.74);
  opacity:0;visibility:hidden;
  transition:opacity var(--dur) var(--ease),visibility var(--dur) linear;
  z-index:-1;
}
.site-header[data-open]::before{opacity:1;visibility:visible}

.header-top{
  display:flex;align-items:center;gap:12px;
  flex:1 1 auto;min-width:0;
}

.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand__mark{
  flex:0 0 auto;
  display:grid;place-items:center;
  width:28px;height:28px;
  background:var(--cyan);color:var(--ink);
  font-weight:900;font-size:15px;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;align-items:flex-start;line-height:1.15;min-width:0}
.brand__name{font-weight:900;font-size:15px;letter-spacing:.06em;color:var(--paper);white-space:nowrap}
.brand__tagline{font-size:.7rem;color:var(--mist);opacity:.75;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}

.axis-seg{
  display:flex;align-items:center;gap:2px;flex:0 0 auto;
  padding:2px;
  background:var(--deep);
  border:1px solid var(--turf);
  clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px);
}
.axis-seg__btn{
  padding:5px 7px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.02em;
  color:var(--mist);
  border:1px solid transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.axis-seg__btn:hover{border-color:var(--turf)}
.axis-seg__btn[aria-pressed="true"]{background:var(--cyan);color:var(--ink);border-color:var(--cyan)}
.axis-seg__btn:focus-visible{outline:0;box-shadow:inset 0 0 0 2px var(--signal)}

/* ---------- nav：mobile drawer ---------- */
.rail-nav{
  position:fixed;
  top:0;bottom:0;left:0;
  width:min(84vw,340px);
  display:flex;flex-direction:column;gap:20px;
  padding:24px 20px 30px;
  background:var(--deep);
  border-right:1px solid var(--turf);
  overflow-y:auto;
  transform:translateX(-102%);
  transition:transform var(--dur) var(--ease);
  z-index:95;
}
.rail-nav[data-open]{transform:translateX(0)}

.rail-nav__title{
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.26em;
  color:var(--mist);opacity:.6;
}
.rail-nav__list{display:flex;flex-direction:column;gap:2px;margin-top:10px}
.rail-nav__item{display:block}
.rail-nav__link{
  display:flex;align-items:baseline;gap:12px;
  padding:11px 10px;
  border-left:2px solid transparent;
  color:var(--dark-ink);
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.rail-nav__link:hover{background:var(--stand);border-left-color:var(--turf);color:var(--paper)}
.rail-nav__link[aria-current="page"]{background:var(--stand);border-left-color:var(--cyan);color:var(--paper)}
.rail-nav__num{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  color:var(--cyan);
}
.rail-nav__label{font-size:.96rem;font-weight:500}
.rail-nav__link[aria-current="page"] .rail-nav__num{color:var(--signal)}
.rail-nav__link--sub{padding:8px 10px;font-size:.86rem;color:var(--mist);opacity:.85;border-left-color:transparent}
.rail-nav__link--sub:hover{opacity:1;border-left-color:var(--turf)}
.rail-nav__legal{border-top:1px solid var(--turf);padding-top:16px}

/* ---------- nav toggle ---------- */
.nav-toggle{
  position:fixed;left:16px;bottom:16px;z-index:96;
  display:inline-flex;align-items:center;gap:10px;
  padding:12px 16px;
  background:var(--stand);color:var(--paper);
  border:1px solid var(--cyan);
  font-family:var(--font-mono);font-size:.76rem;letter-spacing:.14em;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle:hover{background:var(--turf)}
.nav-toggle:focus-visible{outline:0;box-shadow:inset 0 0 0 2px var(--signal)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:var(--cyan);transition:background var(--dur) var(--ease)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--cyan);
  transition:transform var(--dur) var(--ease);
}
.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)}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;
  left:0;top:calc(var(--header-h) - 1px);
  width:100%;height:2px;
  background:rgba(22,68,58,.55);
  z-index:92;pointer-events:none;
}
.scroll-progress__bar{
  display:block;width:100%;height:100%;
  background:var(--cyan);
  box-shadow:0 0 10px rgba(53,242,214,.5);
  transform-origin:0 50%;
  transform:scaleX(var(--p,0));
  transition:transform 120ms linear;
}

/* ===========================================================
   HEADER — desktop rail
   =========================================================== */
@media (min-width:880px){
  body{padding-top:0;padding-left:var(--rail-w)}

  .site-header{
    inset:0 auto 0 0;
    width:var(--rail-w);height:100vh;
    flex-direction:column;align-items:stretch;gap:0;
    padding:22px 14px 20px;
    background:var(--deep);
    border-bottom:0;border-right:1px solid var(--turf);
  }
  .site-header::before{display:none}

  .header-top{flex-direction:column;align-items:stretch;gap:16px;flex:0 0 auto}
  .brand{flex-direction:column;align-items:flex-start;gap:10px}
  .brand__mark{width:32px;height:32px;font-size:17px}
  .brand__text{align-items:flex-start;gap:10px}
  .brand__name{writing-mode:vertical-rl;text-orientation:mixed;font-size:17px;letter-spacing:.24em;line-height:1}
  .brand__tagline{font-size:.68rem;line-height:1.6;white-space:normal;max-width:100%}

  .axis-seg{flex-direction:column;width:100%;gap:3px;padding:3px}
  .axis-seg__btn{width:100%;text-align:left;padding:7px 9px}

  .rail-nav{
    position:static;
    transform:none;
    width:auto;height:auto;
    flex:1 1 auto;min-height:0;
    display:flex;flex-direction:column;gap:8px;
    margin-top:22px;padding:0;
    background:transparent;border:0;
    overflow-y:auto;
  }
  .rail-nav[data-open]{transform:none}
  .rail-nav__list{gap:0;margin-top:8px}
  .rail-nav__link{flex-direction:column;align-items:flex-start;gap:3px;padding:10px 8px}
  .rail-nav__label{font-size:.9rem}
  .rail-nav__legal{display:none}

  .nav-toggle{display:none}

  .scroll-progress{
    top:0;left:calc(var(--rail-w) - 2px);
    width:2px;height:100vh;
  }
  .scroll-progress__bar{transform-origin:50% 0;transform:scaleY(var(--p,0))}

  .skip-link{left:calc(var(--rail-w) + 8px)}
}

/* ===========================================================
   FOOTER
   =========================================================== */
.site-footer{
  position:relative;
  background:var(--ink);
  border-top:1px solid var(--turf);
  padding:clamp(42px,6vw,84px) 0 30px;
  overflow:hidden;
  color:var(--dark-ink);
}
.footer-track{
  position:absolute;left:-6%;top:56px;
  width:112%;height:1px;
  background:linear-gradient(90deg,transparent,var(--turf) 22%,rgba(53,242,214,.5) 62%,transparent);
  transform:rotate(-2.2deg);
  transform-origin:left center;
  pointer-events:none;
}
.footer-inner{
  position:relative;
  width:100%;max-width:var(--container);
  margin:0 auto;
  padding:0 clamp(18px,4vw,48px);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:620px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1000px){.footer-grid{grid-template-columns:1.2fr .7fr .7fr .7fr 1.5fr;gap:28px}}

.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:1.45rem;letter-spacing:.06em;color:var(--paper);line-height:1.1}
.footer-brand__line{margin-top:10px;font-size:.8rem;color:var(--mist);opacity:.7}
.footer-brand__meta{
  margin-top:16px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;
  color:var(--cyan);
}

.footer-col__title{
  position:relative;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.24em;
  color:var(--mist);opacity:.62;
  padding-bottom:10px;
}
.footer-col__title::after{
  content:"";position:absolute;left:0;bottom:0;
  width:22px;height:2px;background:var(--cyan);
}
.footer-col__list{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.footer-link{
  display:inline-block;
  font-size:.86rem;color:var(--dark-ink);opacity:.82;
  transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.footer-link:hover{color:var(--cyan);opacity:1;transform:translateX(3px)}

.footer-contact__list{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.footer-contact__row{display:flex;flex-wrap:wrap;gap:2px 14px;align-items:baseline}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;
  color:var(--mist);opacity:.55;min-width:68px;
}
.footer-contact__value{font-family:var(--font-mono);font-size:.82rem;letter-spacing:.02em;color:var(--paper)}
.footer-contact__note{
  margin-top:16px;max-width:38ch;
  font-size:.76rem;line-height:1.7;
  color:var(--dark-ink);opacity:.58;
}

.footer-legal{
  display:flex;flex-wrap:wrap;gap:10px 26px;
  justify-content:space-between;align-items:baseline;
  margin-top:clamp(32px,5vw,58px);
  padding-top:20px;
  border-top:1px solid var(--turf);
}
.footer-legal__line{
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.08em;
  color:var(--mist);opacity:.7;
}
.footer-legal__note{font-size:.74rem;color:var(--dark-ink);opacity:.5}

/* ===========================================================
   BASE COMPONENTS
   =========================================================== */

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;
  background:var(--stand);color:var(--paper);
  border:1px solid var(--turf);
  font-size:.86rem;font-weight:600;letter-spacing:.08em;line-height:1;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn:hover{background:var(--turf);border-color:var(--cyan)}
.btn:focus-visible{outline:0;box-shadow:inset 0 0 0 2px var(--signal)}
.btn--primary{background:var(--cyan);color:var(--ink);border-color:var(--cyan)}
.btn--primary:hover{background:var(--mist);border-color:var(--mist)}
.btn--ghost{background:transparent;color:var(--mist);border-color:var(--turf)}
.btn--ghost:hover{background:var(--stand);color:var(--paper)}
.btn--signal{background:transparent;color:var(--paper);border-color:var(--signal)}
.btn--signal:hover{background:rgba(255,90,43,.14)}
.section--paper .btn{background:transparent;color:var(--ink);border-color:var(--paper-line)}
.section--paper .btn:hover{background:var(--ink);color:var(--paper)}
.section--paper .btn--primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* breadcrumb */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__link{color:var(--mist);opacity:.78;transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.breadcrumb__link:hover{color:var(--cyan);opacity:1}
.breadcrumb__sep{color:var(--turf)}
.breadcrumb__current{color:var(--paper)}

/* prose */
.prose{max-width:38em;font-size:1.02rem;line-height:1.85;color:var(--dark-ink)}
.prose > * + *{margin-top:1.25em}
.prose h2,.prose h3{margin-top:2em}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(53,242,214,.45)}
.prose a:hover{border-bottom-color:var(--cyan)}
.prose ul,.prose ol{padding-left:1.4em}
.prose ul{list-style:square}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.5em}
.section--paper .prose{color:var(--paper-ink)}
.section--paper .prose a{color:var(--ink);border-bottom-color:var(--paper-line)}
.prose blockquote{
  padding:16px 20px;border-left:3px solid var(--cyan);
  background:rgba(16,49,42,.5);color:var(--mist);
}

/* grids */
.grid{display:grid;gap:var(--gap);grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.grid--tight{gap:14px}
.grid--2{grid-template-columns:1fr}
@media (min-width:760px){.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* cut panels */
.cut-panel{
  position:relative;
  padding:clamp(20px,3vw,32px);
  background:var(--stand);
  border:1px solid var(--turf);
  color:var(--dark-ink);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.cut-panel--flip{clip-path:polygon(0 0,100% 0,100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.cut-panel--dual{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.cut-panel--accent{border-color:rgba(53,242,214,.55)}
.cut-panel--paper{background:var(--paper);border-color:var(--paper-line);color:var(--paper-ink)}
.cut-panel--paper h2,.cut-panel--paper h3{color:var(--ink)}

/* section head with big outlined chapter number */
.section-head{display:flex;align-items:flex-start;gap:clamp(14px,2.4vw,30px)}
.section-head__num{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:clamp(2.4rem,6vw,4.2rem);
  line-height:1;letter-spacing:.04em;
  color:transparent;
  -webkit-text-stroke:1.4px var(--cyan);
}
@supports not ((-webkit-text-stroke:1px #000)){
  .section-head__num{color:var(--cyan)}
}
.section-head__title{margin-top:.2em;font-size:clamp(1.5rem,3vw,2.2rem);font-weight:900;line-height:1.12;color:var(--paper)}
.section--paper .section-head__title{color:var(--ink)}

/* numerals & annotations */
.num-badge{font-family:var(--font-mono);font-size:clamp(1.05rem,2vw,1.5rem);letter-spacing:.1em;color:var(--cyan)}
.annotation{font-size:.78rem;letter-spacing:.18em;color:var(--mist);opacity:.7}
.annotation--vertical{writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.3em}

/* media containers */
.media{
  position:relative;overflow:hidden;
  background:var(--stand);
  border:1px solid var(--turf);
}
.media--wide{aspect-ratio:16/9}
.media--banner{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)))}
.media__img,.media > img{width:100%;height:100%;object-fit:cover;filter:saturate(.78) contrast(1.06) brightness(.85)}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,11,10,.12),rgba(16,49,42,.6));
}
.media__caption{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;
  color:var(--mist);
}

/* term card / evidence bar */
.term-card{
  padding:16px 18px;
  background:var(--stand);border:1px solid var(--turf);
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
}
.term-card__term{font-size:.95rem;font-weight:700;color:var(--paper)}
.term-card__def{margin-top:8px;font-size:.84rem;line-height:1.75;color:var(--dark-ink);opacity:.86}
.term-card__pages{margin-top:10px;font-family:var(--font-mono);font-size:.68rem;letter-spacing:.12em;color:var(--cyan)}

.evidence-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;
  padding:11px 14px;
  border-left:3px solid var(--signal);
  background:rgba(255,90,43,.07);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;
  color:var(--mist);
}
.evidence-bar__item{display:inline-flex;align-items:center;gap:8px}
.evidence-bar__item + .evidence-bar__item::before{content:"";width:5px;height:5px;background:var(--turf);transform:rotate(45deg)}

/* track line */
.track-line{position:relative;height:1px;background:linear-gradient(90deg,var(--turf),transparent);transform-origin:left center}
.track-line--tilt{transform:rotate(-2.2deg)}
.track-line__node{position:absolute;top:-3px;width:7px;height:7px;background:var(--cyan);clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}

/* tags */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  background:var(--deep);border:1px solid var(--turf);
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;
  color:var(--mist);
}
.tag--cyan{color:var(--cyan);border-color:rgba(53,242,214,.6)}
.tag--signal{color:var(--signal);border-color:rgba(255,90,43,.7)}

/* tabs */
.tabs__list{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--turf)}
.tabs__tab{
  padding:11px 16px;margin-bottom:-1px;
  font-family:var(--font-mono);font-size:.8rem;letter-spacing:.1em;
  color:var(--mist);
  border-bottom:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.tabs__tab:hover{color:var(--paper)}
.tabs__tab[aria-selected="true"]{color:var(--cyan);border-bottom-color:var(--cyan)}
.tabs__panel{padding-top:22px}
.section--paper .tabs__list{border-bottom-color:var(--paper-line)}
.section--paper .tabs__tab{color:var(--paper-ink)}
.section--paper .tabs__tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--ink)}

/* filter */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:14px 16px;
  background:var(--deep);border:1px solid var(--turf);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
}
.filter-bar__input{
  flex:1 1 220px;min-width:0;
  padding:9px 12px;
  background:var(--ink);border:1px solid var(--turf);
  color:var(--paper);font-size:.86rem;
}
.filter-bar__input::placeholder{color:var(--mist);opacity:.5}
.filter-bar__input:focus-visible{outline:0;box-shadow:inset 0 0 0 2px var(--cyan)}
.filter-bar__count{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--cyan)}

/* reveal (only when JS is available) */
@media (prefers-reduced-motion: no-preference){
  html.js [data-reveal]{
    opacity:0;transform:translateX(-14px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  }
  html.js [data-reveal][data-revealed]{opacity:1;transform:none}
  html.js .track-line[data-reveal][data-revealed]{animation:track-draw 900ms var(--ease) both}
}
@keyframes track-draw{
  from{clip-path:inset(0 100% 0 0)}
  to{clip-path:inset(0 0 0 0)}
}

/* reduced motion */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html.js [data-reveal]{opacity:1 !important;transform:none !important}
}