*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
/* Grid/flex children default to min-width:auto and refuse to shrink below their
   content, which is the usual cause of mobile horizontal overflow. */
main *,footer *,header *{min-width:0}
h1,h2,h3,h4,p,li,blockquote,figcaption,dd,dt,summary{overflow-wrap:break-word}
.skip{position:absolute;left:-9999px;top:0;z-index:100;padding:.75rem 1.25rem;background:#000;color:#fff;text-decoration:none}
.skip:focus{left:0}
:focus-visible{outline:3px solid currentColor;outline-offset:2px}
.vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
details>summary{cursor:pointer;min-height:44px;display:flex;align-items:center}
details>summary::-webkit-details-marker{display:none}
@media (prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}

:root{--pearl:#F5F5F7;--graphite:#292C33;--ink:#223D66;--aqua:#CAE8E4;--violet:#D9D3EC;
 --quiet:#6a6e78;--rule:#dcdce1;
 --irid:linear-gradient(120deg,#CAE8E4 0%,#9fd2cc 18%,#D9D3EC 44%,#b3a8d6 60%,
  #eec2d8 76%,#CAE8E4 100%)}
body{background:var(--pearl);color:var(--graphite);
 font:400 17px/1.7 "Plus Jakarta Sans",system-ui,sans-serif}
h1,h2,h3,h4{font-family:"Plus Jakarta Sans",system-ui,sans-serif;font-weight:800;
 margin:0;letter-spacing:-.024em}
.ir-w{max-width:1260px;margin:0 auto;padding:0 28px}

/* ---- indexed opening ---- */
.ir-op{padding:34px 0 0}
.ir-grid{max-width:1260px;margin:0 auto;padding:0 28px;display:grid;
 grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:0 40px;align-items:start}
/* the iridescent edge: padding on the wrapper shows only right and bottom */
.ir-blockwrap{grid-column:1;grid-row:1;background:var(--irid);
 background-size:280% 100%;padding:0 5px 5px 0}
.ir-block{background:var(--graphite);color:#e4e6ea;padding:0 0 34px}
.ir-nav{display:flex;flex-wrap:wrap;gap:8px 26px;align-items:baseline;
 padding:14px 34px;border-bottom:1px solid #3d424c}
.ir-nav-id{margin:0;font-size:14px;font-weight:700;color:#9aa1ad}
.ir-nav ul{list-style:none;margin:0 0 0 auto;padding:0;display:flex;gap:0 24px;
 flex-wrap:wrap}
.ir-nav a{display:inline-block;padding:8px 0;color:#fff;text-decoration:none;
 font-size:14.5px;font-weight:600}
.ir-nav a:hover{color:var(--aqua)}
.ir-body{padding:36px 34px 0}
.ir-k{margin:0 0 14px;font-size:13.5px;font-weight:700;color:var(--aqua)}
h1{font-size:clamp(34px,4.5vw,72px);line-height:1.02;color:#fff;max-width:15ch}
.ir-sub{margin:16px 0 0;font-size:18.5px;max-width:48ch;color:#b9bec8}
.ir-acts{margin:26px 0 0;display:flex;gap:11px;flex-wrap:wrap}
.ir-a{display:inline-block;padding:13px 22px;font-weight:700;font-size:15px;
 text-decoration:none;background:#fff;color:var(--graphite)}
.ir-a--o{background:transparent;color:#fff;box-shadow:inset 0 0 0 2px #6e7580}
.ir-a:hover{background:var(--aqua);color:var(--graphite);box-shadow:none}
/* dates and venue sit OUTSIDE the edge, below the block */
.ir-outside{grid-column:1;grid-row:2;margin:16px 0 0;display:flex;flex-wrap:wrap;
 gap:12px 44px}
.ir-outside div{min-width:0}
.ir-outside dt{font-size:12.5px;color:var(--quiet)}
.ir-outside dd{margin:2px 0 0;font-size:16px;font-weight:700}
/* the day index descends in the remaining column */
.ir-index{grid-column:2;grid-row:1/3}
.ir-index ol{list-style:none;margin:0;padding:0}
.ir-index-h{margin:0 0 12px;font-size:13px;font-weight:700;color:var(--quiet)}
.ir-index li{border-top:1px solid var(--rule)}
.ir-index li:last-child{border-bottom:1px solid var(--rule)}
.ir-index a{display:grid;grid-template-columns:2.4rem minmax(0,1fr);gap:14px;
 padding:13px 0;text-decoration:none;align-items:baseline}
.ir-index a:hover{color:var(--ink)}
.ir-no{font-size:22px;font-weight:800;color:var(--ink);line-height:1}
.ir-index b{display:block;font-size:15.5px;font-weight:700;line-height:1.3}
.ir-index small{display:block;font-size:12.5px;color:var(--quiet);margin-top:2px}
.ir-wide{margin:40px 0 0}
.ir-wide img{width:100%;height:auto;aspect-ratio:3/1;object-fit:cover;
 object-position:50% 40%}
.ir-wide figcaption{max-width:1260px;margin:0 auto;padding:11px 28px;
 font-size:12.5px;color:var(--quiet)}

/* ---- sections ---- */
.ir-s{padding:68px 0}
.ir-s--white{background:#fff}
.ir-s--ink{background:var(--ink);color:#c8d6e8}
.ir-s--ink h2,.ir-s--ink h3,.ir-s--ink h4{color:#fff}
h2{font-size:clamp(26px,3vw,42px);line-height:1.08;margin:0 0 16px}
.ir-lead{font-size:18.5px;max-width:68ch;margin:0 0 30px;color:#4a4e58}
.ir-s--ink .ir-lead{color:#a8bad0}
.ir-more{margin:30px 0 0;font-weight:700}
.ir-more a{color:var(--ink)}
.ir-s--ink .ir-more a{color:var(--aqua)}

/* ---- chapters: iridescent rule marks the boundary, never the background --- */
.ir-ch{padding:38px 0 42px}
.ir-edge{height:3px;background:var(--irid);margin:0 0 20px}
.ir-ch-h{display:flex;flex-wrap:wrap;gap:6px 24px;align-items:baseline}
.ir-ch-n{margin:0;font-size:13px;font-weight:800;color:var(--ink)}
.ir-ch h3{font-size:clamp(23px,2.5vw,34px);line-height:1.1}
.ir-ch-d{margin:0;font-size:14.5px;color:var(--quiet)}
.ir-ch-b{margin:14px 0 0;max-width:74ch;color:#4a4e58;font-size:18px}
.ir-rows{list-style:none;margin:24px 0 0;padding:0;display:grid;
 grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px}
.ir-rows li{padding:14px 0;border-top:1px solid var(--rule)}
.ir-rows h4{font-size:17px;font-weight:700;line-height:1.32}
.ir-when{margin:4px 0 0;font-size:13.5px;color:var(--quiet)}
.attr{margin:4px 0 0;font-size:14px;color:#4a4e58}
/* a speaker inset lives inside the chapter it belongs to */
.ir-inset{margin:26px 0 0;background:var(--pearl);padding:20px;display:grid;
 grid-template-columns:64px minmax(0,1fr);gap:18px;align-items:start;
 max-width:760px}
.ir-s--white .ir-inset{background:#f1f1f4}
.ir-inset img{width:64px;height:64px;object-fit:cover}
.ir-inset-n{margin:0;font-size:18px;font-weight:800;line-height:1.2}
.ir-inset-r{margin:5px 0 0;font-size:14px;color:#4a4e58}
.ir-inset-s{margin:9px 0 0;font-size:14.5px;font-weight:700}

/* ---- attendance / online / venue / gallery ---- */
.ir-modes{list-style:none;margin:0;padding:0;display:grid;
 grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}
.ir-modes li{padding:0 0 0 20px;border-left:3px solid var(--ink)}
.ir-modes h3{font-size:20px;margin:0 0 8px}
.ir-modes p{margin:0;color:#4a4e58}
.ir-online{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}
.ir-online h3{font-size:19px;margin:0 0 8px}
.ir-online p{margin:0;font-size:15.5px;color:#a8bad0}
.ir-venue{margin:0 0 36px;display:grid;
 grid-template-columns:minmax(0,13rem) minmax(0,1fr);gap:0 30px;max-width:880px}
.ir-venue dt{font-size:13.5px;color:var(--quiet);padding:11px 0;
 border-top:1px solid var(--rule)}
.ir-venue dd{margin:0;padding:11px 0;border-top:1px solid var(--rule);font-weight:700}
.ir-gal{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.ir-gal figure{margin:0}
.ir-gal img{width:100%;height:auto;aspect-ratio:1/1;object-fit:cover}
.ir-gal figcaption{margin-top:9px;font-size:12.5px;color:var(--quiet)}

/* ---- faq / organiser ---- */
.ir-q{border-top:1px solid var(--rule);padding:4px 0}
.ir-q summary{font-weight:800;font-size:18px;padding:13px 0}
.ir-q p{margin:0 0 16px;max-width:70ch;color:#4a4e58}
.ir-org{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}
.ir-org h3{font-size:18px;margin:0 0 10px}
.ir-org p{margin:0 0 10px;font-size:15px;color:#4a4e58}
.ir-org a{color:var(--ink);font-weight:700}

/* ---- footer ---- */
.ft{background:var(--graphite);color:#c9ccd2}
.ft-in{max-width:1260px;margin:0 auto;padding:52px 28px;display:grid;gap:12px}
.ft-org strong{color:#fff}
.ft-links{list-style:none;display:flex;flex-wrap:wrap;gap:18px;padding:0;margin:8px 0}
.ft-links a{color:var(--aqua);font-weight:700;font-size:14.5px}
.ft-note,.ft-id,.ft-contact{font-size:13.5px;color:#a9adb5;margin:0;max-width:78ch}
.ft-contact a{color:#fff}
.ft-c{font-size:13px;color:#979ba3;margin:10px 0 0}

@media (max-width:1000px){
  .ir-rows{grid-template-columns:minmax(0,1fr)}
  .ir-online{grid-template-columns:minmax(0,1fr);gap:26px}
  .ir-modes,.ir-org{grid-template-columns:minmax(0,1fr)}
  .ir-gal{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:800px){
  /* graphite block, external date line, day index, photograph -- in that
     order, with a single iridescent edge and no gradient behind any text. */
  .ir-grid{grid-template-columns:minmax(0,1fr);gap:0;padding:0}
  .ir-blockwrap{grid-column:1;grid-row:auto;padding:0 0 5px}
  .ir-outside{grid-column:1;grid-row:auto;margin:20px 0 0;padding:0 28px}
  .ir-index{grid-column:1;grid-row:auto;margin:28px 0 0;padding:0 28px}
  .ir-nav{padding:12px 28px}
  .ir-body{padding:30px 28px 0}
  .ir-wide img{aspect-ratio:3/2}
  .ir-gal{grid-template-columns:minmax(0,1fr)}
  .ir-venue{grid-template-columns:minmax(0,1fr);gap:0}
  .ir-venue dt{padding-bottom:0}
  .ir-venue dd{padding-top:2px;border-top:0}
  .ir-acts{width:100%}
  .ir-a{flex:1;text-align:center}
  .ir-s{padding:50px 0}
}
@media (prefers-reduced-motion:no-preference){
  /* one highlight travels the edge and stops; the static border is the end
     state, so reduced motion loses nothing. */
  .ir-blockwrap{animation:ir-travel 2.4s ease-in-out 1 forwards}
  @keyframes ir-travel{from{background-position:100% 0}to{background-position:0 0}}
}