*,*::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{
  --crm:#F7F1E6;--navy:#263B5B;--cob:#3A64D8;
  --org:#D96A3D;--blk:#17191D;
  --orgtext:#B54D23;--orgpale:#E39270;
}
body{background:var(--crm);color:var(--blk);
  font-family:Archivo,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.6}
h1,.os-dayh,.os-feat h3{font-family:"Archivo Black",Archivo,system-ui,sans-serif;
  font-weight:400}
h2,h3,h4{font-weight:700;line-height:1.16;margin:0 0 .5em;letter-spacing:-.015em}
p{margin:0 0 1em}
.os-in{max-width:1240px;margin:0 auto;padding:0 30px}

/* ---------- compact navy bar ---------- */
.os-bar{background:var(--navy)}
.os-bar-in{max-width:1240px;margin:0 auto;padding:7px 30px;display:flex;
  align-items:center;gap:22px;flex-wrap:wrap}
.os-id{margin:0;color:var(--crm);font-size:14px;font-weight:600}
.os-nav{margin-left:auto}
.os-nav ul{list-style:none;display:flex;gap:26px;margin:0;padding:0;flex-wrap:wrap}
.os-nav a{color:var(--crm);text-decoration:none;font-size:14.5px;display:inline-flex;
  align-items:center;min-height:42px}
.os-nav a:hover{color:var(--orgtext)}
.os-nav a:focus-visible{outline:3px solid var(--org);outline-offset:2px}

/* ---------- typographic opening ---------- */
.os-open{background:var(--crm);padding:52px 0 64px}
.os-open-in{display:grid;grid-template-columns:300px minmax(0,1fr);gap:46px;
  align-items:end}
.os-tall{margin:0}
.os-tall img{width:300px;height:470px;object-fit:cover}
.os-tall figcaption{font-size:12px;color:#5c6270;margin-top:9px;max-width:300px}
.os-kick{margin:0 0 16px;color:var(--cob);font-weight:700;font-size:15px}
.os-type h1{font-size:clamp(38px,5.4vw,76px);line-height:1.04;margin:0 0 30px;
  color:var(--navy);letter-spacing:-.02em;
  text-shadow:7px 7px 0 var(--cob);animation:os-drop .45s ease-out both}
@keyframes os-drop{from{text-shadow:0 0 0 var(--cob)}to{text-shadow:7px 7px 0 var(--cob)}}
@media (prefers-reduced-motion:reduce){
  .os-type h1{animation:none;text-shadow:7px 7px 0 var(--cob)}}
.os-slab{background:var(--org);color:var(--blk);padding:22px 28px;max-width:560px}
.os-slab-d{margin:0 0 2px;font-size:clamp(20px,2.2vw,28px);font-weight:700}
.os-slab-l{margin:0 0 16px;font-size:15px}
.os-slab-a{display:flex;gap:10px;flex-wrap:wrap;margin:0}
.os-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;
  padding:0 22px;border:2px solid currentColor;text-decoration:none;font-weight:700;
  font-size:15px;color:inherit}
.os-btn--f{background:#fff;color:var(--orgtext);border-color:#fff}
.os-btn:hover{background:var(--navy);border-color:var(--navy);color:#fff}
.os-btn:focus-visible{outline:3px solid var(--navy);outline-offset:3px}

/* ---------- sections ---------- */
.os-sec{padding:62px 0;background:#fff}
.os-sec h2{font-size:clamp(26px,3vw,42px);color:var(--navy)}
.os-sub{color:#5c6270;max-width:76ch}
.os-big{font-size:18.5px;color:#31363f;max-width:62ch}
.os-lnk{color:var(--cob);font-weight:700}
.os-purp{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:50px}
.os-purp-side{background:var(--crm);padding:26px 24px}
.os-purp-side h3{font-size:14px;color:var(--orgtext)}
.os-themes{margin:0;padding-left:20px;font-size:15px}
.os-themes li{padding:8px 0;border-bottom:1px solid rgba(38,59,91,.18)}

/* ---------- day sections ---------- */
.os-sec--prog{padding-bottom:0;background:var(--crm)}
.os-day{padding:44px 0}
.os-day--c{background:var(--crm)}
.os-day--w{background:#fff}
.os-dayh{font-size:clamp(28px,3.6vw,50px);margin:0 0 6px;color:var(--navy);
  text-shadow:5px 5px 0 var(--cob);line-height:1.05}
.os-dayd{margin:0 0 20px;font-size:16px;font-weight:600;color:var(--orgtext)}
.os-slist{list-style:none;margin:0 0 20px;padding:0;columns:2;column-gap:48px}
.os-slist li{break-inside:avoid;display:grid;grid-template-columns:72px 1fr;gap:16px;
  padding:13px 0;border-top:1px solid rgba(23,25,29,.16)}
.os-s-t{margin:0;font-weight:700;font-size:14.5px;color:var(--cob)}
.os-slist h4{margin:0 0 3px;font-size:17px;color:var(--blk)}
.os-s-w{margin:0;font-size:13.5px;color:#4a5060}
.os-s-p{margin:5px 0 0;font-size:13.5px;color:#5c6270}

/* ---------- speaker features: one large name each ---------- */
.os-sec--ev{background:var(--navy);color:#e7e2d7}
.os-sec--ev h2{color:#fff}
.os-sec--ev .os-sub{color:#b3bcce}
.os-sec--ev .os-lnk{color:var(--orgpale)}
.os-feats{margin:30px 0 26px}
.os-feat{padding:26px 0;border-top:2px solid rgba(231,226,215,.3)}
.os-feat h3{font-size:clamp(26px,3.6vw,46px);margin:0 0 14px;color:#fff;
  line-height:1.05;text-shadow:4px 4px 0 var(--cob)}
.os-feat-b{display:grid;grid-template-columns:96px minmax(0,1fr);gap:22px;
  align-items:start}
.os-feat-b img{width:96px;height:96px;object-fit:cover}
.os-feat-r{margin:0 0 8px;font-size:15px;color:#b3bcce;text-shadow:none}
.os-feat-s{margin:0;font-size:16.5px;color:#fff;max-width:62ch;text-shadow:none}

/* ---------- participation / scenes / venue / sponsors / faq ---------- */
.os-sec--part{background:var(--crm)}
.os-part{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:46px;
  align-items:start}
.os-part-acts{display:grid;gap:12px;margin:0}
.os-part .os-btn{border-color:var(--navy);color:var(--navy)}
.os-part .os-btn--f{background:var(--navy);color:#fff;border-color:var(--navy)}
.os-part .os-btn:hover{background:var(--org);border-color:var(--org);color:var(--blk)}
.os-gal{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.os-gf{margin:0}
.os-gf img{width:100%;aspect-ratio:3/2;object-fit:cover}
.os-gf figcaption{font-size:12.5px;color:#5c6270;margin-top:8px}
.os-quotes{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:36px}
.os-q{margin:0;background:var(--crm);padding:24px;border-left:6px solid var(--cob)}
.os-q blockquote{margin:0}
.os-q p{margin:0 0 12px;font-size:16px}
.os-q figcaption{font-size:13.5px;font-weight:700;color:var(--navy)}
.os-sec--venue{background:var(--crm)}
.os-venue{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:46px}
.os-venue-dl{margin:0;background:#fff;padding:8px 24px}
.os-venue-dl>div{padding:13px 0;border-bottom:1px solid rgba(38,59,91,.18)}
.os-venue-dl>div:last-child{border-bottom:0}
.os-venue-dl dt{font-size:12px;letter-spacing:.1em;color:var(--orgtext);font-weight:700}
.os-venue-dl dd{margin:2px 0 0;font-weight:700;color:var(--navy)}
.os-spon{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:44px;
  align-items:center}
.os-spon-acts{display:grid;gap:12px;margin:0}
.os-spon .os-btn{border-color:var(--navy);color:var(--navy)}
.os-faq{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:48px;
  align-items:start}
.os-sec--faq{background:var(--crm)}
.os-faq details{border-bottom:1px solid rgba(23,25,29,.2)}
.os-faq summary{font-weight:700;font-size:17px;padding:15px 0;color:var(--navy)}
.os-faq summary:hover{color:var(--cob)}
.os-faq details p{margin:0 0 16px;color:#4a5060;max-width:68ch}
.os-legal h3{font-size:14px;color:var(--orgtext)}
.os-legal ul{list-style:none;margin:0;padding:0;background:#fff}
.os-legal li{border-bottom:1px solid rgba(38,59,91,.16)}
.os-legal a{display:flex;align-items:center;min-height:48px;padding:0 16px}

/* ---------- footer ---------- */
.ft{background:var(--blk);color:#cfd3da;padding:50px 0 32px}
.ft-in{max-width:1240px;margin:0 auto;padding:0 30px}
.ft-org strong{color:#fff}
.ft-links{list-style:none;display:flex;flex-wrap:wrap;gap:2px 26px;padding:0;margin:0 0 18px}
.ft-links a{color:var(--crm);font-size:14.5px;min-height:44px;display:inline-flex;
  align-items:center}
.ft-links a:hover{color:var(--org)}
.ft-note{font-size:13px;color:#9aa0ab;max-width:78ch;margin:0 0 10px}
.ft-c{font-size:12.5px;color:#868d99;margin:22px 0 0;
  border-top:1px solid rgba(247,241,230,.18);padding-top:18px}

/* ---------- tablet ---------- */
@media (max-width:1040px){
  .os-open-in{grid-template-columns:1fr;gap:26px}
  .os-tall{order:2}
  .os-tall img{width:100%;height:clamp(300px,42vw,420px)}
  .os-tall figcaption{max-width:none}
  .os-slab{max-width:none}
  .os-purp,.os-part,.os-venue,.os-spon,.os-faq{grid-template-columns:1fr;gap:30px}
  .os-slist{columns:1}
  .os-gal{grid-template-columns:1fr}
  .os-quotes{grid-template-columns:1fr}
}
/* ---------- mobile: smaller shadow offset, no overflow at 320px ---------- */
@media (max-width:640px){
  body{font-size:16px}
  .os-in,.os-bar-in{padding-left:18px;padding-right:18px}
  .os-nav ul{gap:16px}
  .os-open{padding:30px 0 38px}
  .os-type h1{font-size:clamp(38px,10.2vw,46px);text-shadow:3px 3px 0 var(--cob)}
  @keyframes os-drop{from{text-shadow:0 0 0 var(--cob)}
    to{text-shadow:3px 3px 0 var(--cob)}}
  .os-dayh{font-size:clamp(28px,8vw,36px);text-shadow:3px 3px 0 var(--cob)}
  .os-feat h3{font-size:clamp(26px,7.4vw,32px);text-shadow:3px 3px 0 var(--cob)}
  .os-slab{padding:18px 20px}
  .os-slab-a{display:grid;gap:10px}
  .os-sec{padding:42px 0}
  .os-day{padding:32px 0}
  .os-slist li{grid-template-columns:62px 1fr;gap:12px}
  .os-feat-b{grid-template-columns:72px 1fr;gap:16px}
  .os-feat-b img{width:72px;height:72px}
  .ft-links{flex-direction:column;gap:0}
}