/* Mentein exercise library — light archive direction (web-ui-media) */
:root {
  --page: #F4F3EF;
  --surface: #FFFFFF;
  --ink: #1F242B;
  --muted: #5C6570;
  --line: #DCDAD2;
  --accent: #E86A17;      /* kin of the muscle-highlight orange */
  --accent-ink: #FFFFFF;
  --focus: #336BCE;
  --radius: .7rem;
  --font: ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: var(--font); line-height: 1.55; }
img { max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.shell { width: min(100% - 2.5rem, 72rem); margin-inline: auto; }

.skip-link { position: fixed; top: .75rem; left: .75rem; z-index: 200;
  background: var(--surface); padding: .7rem 1rem; border-radius: var(--radius);
  transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }

/* header */
.site-header { display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 4.5rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 750; letter-spacing: -.03em; font-size: 1.25rem; text-decoration: none; }
.brand-sub { color: var(--muted); font-weight: 500; font-size: .85rem; }
.site-nav { display: flex; gap: 1.25rem; }
.site-nav a { text-decoration: none; color: var(--muted); font-size: .95rem;
  padding: .5rem 0; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--ink); }
.site-nav a[aria-current] { box-shadow: inset 0 -2px 0 var(--accent); }

/* hero */
.hero { padding: 3.5rem 0 2.5rem; max-width: 46rem; }
@media (min-width: 52rem) {
  .hero { max-width: none; padding: 3.5rem 0 2rem;
    display: grid; grid-template-columns: minmax(0, 30rem) minmax(0, 1fr);
    gap: 2.5rem; align-items: center; }
  .hero-visual { justify-self: center; }
  .hero-visual img { width: min(100%, 26rem); height: auto; border-radius: 1rem;
    border: 1px solid var(--line); background: #F2F2F2; }
}
.eyebrow { margin: 0 0 .8rem; color: var(--accent); font-weight: 700;
  font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.06;
  letter-spacing: -.03em; text-wrap: balance; }
.lede { margin: 1.1rem 0 0; color: var(--muted); font-size: 1.06rem; max-width: 42ch; }
.hero-facts { display: flex; gap: 2.5rem; margin: 2rem 0 0; padding: 0;
  flex-wrap: wrap; }
.hero-facts div { min-width: 7rem; }
.hero-facts dt { font-size: .78rem; color: var(--muted); letter-spacing: .06em;
  text-transform: uppercase; }
.hero-facts dd { margin: .2rem 0 0; font-size: 1.15rem; font-weight: 700;
  font-variant-numeric: tabular-nums; }

/* toolbar */
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1rem;
  padding: 1.4rem 0 1.8rem; border-top: 1px solid var(--line); margin-top: 2.5rem; }
.search-wrap { display: flex; flex-direction: column; gap: .25rem; min-width: 15rem;
  flex: 1 1 15rem; max-width: 22rem; }
.search-label { font-size: .75rem; color: var(--muted); letter-spacing: .06em;
  text-transform: uppercase; }
#search { padding: .6rem .8rem; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); min-height: 2.75rem; }
.chip-group { display: flex; flex-wrap: wrap; gap: .45rem; }
.chip-group[aria-label^="Filter"] { margin-left: .2rem; }
.chip { border: 1px solid var(--line); background: var(--surface); color: var(--muted);
  border-radius: 999px; padding: .45rem .85rem; min-height: 2.4rem; cursor: pointer;
  font-size: .88rem; transition: background-color 140ms, color 140ms, border-color 140ms; }
.chip:hover { border-color: var(--muted); color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); border-color: var(--ink);
  color: var(--page); }
.result-count { margin: 0; color: var(--muted); font-size: .88rem;
  font-variant-numeric: tabular-nums; flex-basis: 100%; }
.clear-btn { border: 0; background: none; color: var(--accent); cursor: pointer;
  padding: .4rem .2rem; font-size: .88rem; text-decoration: underline; }
.linklike { border: 0; background: none; color: var(--accent); cursor: pointer;
  text-decoration: underline; padding: 0; font: inherit; }

/* grid */
.poster-grid { list-style: none; margin: 0; padding: 0; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
  gap: 1.6rem 1.1rem; }
.poster-card { min-width: 0; }
.poster-card > button { display: block; width: 100%; padding: 0; border: 0;
  background: none; cursor: pointer; text-align: left; color: inherit;
  border-radius: .8rem; }
.poster-media { position: relative; aspect-ratio: 1; border-radius: .8rem;
  overflow: hidden; background: #F2F2F2; border: 1px solid var(--line); }
.poster-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.poster-hint { position: absolute; inset-inline: .6rem; bottom: .6rem;
  display: flex; justify-content: flex-end; pointer-events: none; opacity: 0;
  transition: opacity 140ms; }
.poster-card > button:hover .poster-hint,
.poster-card > button:focus-visible .poster-hint { opacity: 1; }
.poster-hint span { background: #1F242Bcc; color: #fff; font-size: .78rem;
  padding: .35rem .6rem; border-radius: 999px; }
.poster-card h3 { margin: .7rem 0 .15rem; font-size: .98rem; line-height: 1.35; }
.poster-meta { margin: 0; color: var(--muted); font-size: .82rem; }
.empty-state { padding: 2.5rem 0; color: var(--muted); }

/* about */
.about { padding: 3rem 0 2rem; max-width: 44rem; }
.about h2 { font-size: 1.4rem; letter-spacing: -.02em; }
.about p { color: var(--muted); }

/* footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 2rem;
  padding: 1.5rem 0 2.5rem; color: var(--muted); font-size: .85rem; }

/* lightbox */
.lightbox { position: fixed; inset: 0; z-index: 100; display: grid;
  place-items: center; padding: 1rem; }
.lightbox[hidden] { display: none; }
.lightbox-backdrop { position: absolute; inset: 0; background: #14161Ad9; }
.lightbox-panel { position: relative; background: var(--surface); border-radius: 1rem;
  width: min(100%, 62rem); max-height: calc(100vh - 2rem); overflow: auto;
  display: grid; grid-template-columns: minmax(0, 1fr) 17rem; }
.lb-stage { margin: 0; background: #F2F2F2; position: relative; min-height: 20rem; }
.lb-stage img { width: 100%; height: 100%; object-fit: contain; display: block;
  aspect-ratio: 1; }
.lb-play { position: absolute; inset: 0; margin: auto; width: 9rem; height: 3rem;
  border: 0; border-radius: 999px; background: var(--accent); color: var(--accent-ink);
  font-weight: 650; cursor: pointer; }
.lb-close { position: absolute; top: .6rem; right: .6rem; z-index: 2; width: 2.6rem;
  height: 2.6rem; border-radius: 999px; border: 0; background: #1F242Bcc;
  color: #fff; cursor: pointer; font-size: 1rem; }
.lb-nav { position: absolute; top: 50%; transform: translateY(-50%); z-index: 2;
  width: 2.8rem; height: 2.8rem; border-radius: 999px; border: 0;
  background: #1F242Bcc; color: #fff; cursor: pointer; font-size: 1.4rem; }
.lb-prev { left: .6rem; }
.lb-next { right: calc(17rem + .6rem); }
.lb-info { padding: 1.6rem 1.5rem 2rem; min-width: 0; }
.lb-eyebrow { margin: 0 0 .4rem; color: var(--accent); font-size: .75rem;
  letter-spacing: .12em; text-transform: uppercase; font-weight: 700; }
.lb-info h2 { margin: 0; font-size: 1.5rem; letter-spacing: -.02em; }
.lb-meta { list-style: none; padding: 0; margin: 1rem 0 0; display: flex;
  flex-wrap: wrap; gap: .4rem .9rem; color: var(--muted); font-size: .85rem; }
.lb-meta li + li::before { content: "·"; margin-right: .9rem; color: var(--line); }
.lb-tips { margin: 1.1rem 0 0; padding-left: 1.1rem; color: var(--ink);
  font-size: .92rem; }
.lb-tips li + li { margin-top: .5rem; }
.lb-pos { margin: 1.2rem 0 0; color: var(--muted); font-size: .8rem;
  font-variant-numeric: tabular-nums; }

@media (max-width: 52rem) {
  .hero { padding-top: 2.5rem; }
  .hero-facts { gap: 1.5rem; }
  .lightbox-panel { grid-template-columns: 1fr; width: min(100%, 30rem); }
  .lb-next { right: .6rem; }
  .lb-stage { min-height: 0; }
}
@media (max-width: 30rem) {
  .poster-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem .7rem; }
  .site-nav { gap: .9rem; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}