/* ====================================================================
   D2C Insider AI Summit — styles.css
   Bauhaus / Neo-Brutalist theme. Dependency-free, mobile-first.
   "Form follows function": flat color, thick black borders,
   hard offset shadows, oversized uppercase Space Grotesk.
   ==================================================================== */

/* ================= TOKENS ================= */
:root{
  /* surfaces */
  --paper:#f5f0e8;        /* warm off-white canvas */
  --surface:#faf7f2;      /* card bg */
  --surface-2:#e8e3da;    /* alt card / banded bg */
  --ink:#1a1a1a;          /* text, borders, primary */
  --on-ink:#f5f0e8;       /* text on black */
  --muted:#4a4a4a;

  /* accents — limited palette, one per section */
  --yellow:#ffcc00;
  --yellow-dim:#e6b800;
  --red:#e63b2e;
  --blue:#0055ff;

  /* aliases (used by some shared pieces) */
  --line:var(--ink);

  --display:'Space Grotesk',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;

  --shadow:8px 8px 0 var(--ink);
  --shadow-sm:4px 4px 0 var(--ink);
  --shadow-yellow:8px 8px 0 var(--yellow);
  --shadow-red:8px 8px 0 var(--red);
  --shadow-blue:8px 8px 0 var(--blue);

  --bw:3px;               /* standard border weight */
  --nav-h:70px;
  --wrap:1240px;
}

/* ================= RESET / BASE ================= */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} }
body{
  font-family:var(--body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
::selection{background:var(--yellow);color:var(--ink)}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:760px){ .wrap{padding:0 32px} }

h1,h2,h3,h4{font-family:var(--display);font-weight:800;line-height:1.04;letter-spacing:-.02em}

/* ================= SECTION SHELL ================= */
.section{padding:64px 0;border-bottom:var(--bw) solid var(--ink)}
@media(min-width:760px){ .section{padding:96px 0} }
.kicker{
  display:inline-block;font-family:var(--display);font-weight:700;
  text-transform:uppercase;letter-spacing:.04em;font-size:13px;
  background:var(--ink);color:var(--on-ink);padding:5px 12px;margin-bottom:18px;
}
.sec-title{
  font-size:clamp(34px,7vw,72px);text-transform:uppercase;
  margin-bottom:14px;
}
.sec-sub{font-size:clamp(15px,2.4vw,19px);font-weight:500;max-width:60ch;color:var(--muted);margin-bottom:8px}
.grad-red{color:var(--red)} .grad-blue{color:var(--blue)} .grad-yellow{color:var(--yellow-dim)}
.hl{background:var(--yellow);color:var(--ink);padding:0 .18em;box-decoration-break:clone;-webkit-box-decoration-break:clone}

/* ================= BUTTONS ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--display);font-weight:800;text-transform:uppercase;
  letter-spacing:.01em;font-size:15px;line-height:1;
  padding:14px 22px;border:var(--bw) solid var(--ink);background:var(--paper);color:var(--ink);
  box-shadow:var(--shadow-sm);transition:transform .12s ease,box-shadow .12s ease,background .15s,color .15s;
  white-space:nowrap;
}
.btn:hover{transform:translate(4px,4px);box-shadow:none}
.btn:active{transform:translate(4px,4px);box-shadow:none}
.btn-yellow{background:var(--yellow);color:var(--ink)}
.btn-ink{background:var(--ink);color:var(--on-ink)}
.btn-ink:hover{background:var(--ink);color:var(--yellow)}
.btn-lg{font-size:clamp(16px,2.4vw,20px);padding:18px 30px;box-shadow:var(--shadow)}
.btn-lg:hover{transform:translate(6px,6px)}
.btn-sm{font-size:13px;padding:10px 16px}
.btn-block{width:100%}
.arr{transition:transform .15s}
.btn:hover .arr{transform:translateX(3px)}

/* ================= SCROLL PROGRESS ================= */
#progress{position:fixed;top:0;left:0;height:5px;width:0;background:var(--red);z-index:120}

/* ================= TICKER ================= */
.ticker{background:var(--ink);color:var(--on-ink);border-bottom:var(--bw) solid var(--ink);
  overflow:hidden;white-space:nowrap;padding:11px 0}
.ticker-track{display:inline-block;white-space:nowrap;animation:tickerScroll 34s linear infinite;will-change:transform}
.ticker-track span{font-family:var(--display);font-weight:700;text-transform:uppercase;
  letter-spacing:.08em;font-size:14px}
@keyframes tickerScroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ================= NAV ================= */
#nav{position:sticky;top:0;z-index:100;background:var(--paper);
  border-bottom:var(--bw) solid var(--ink);transition:box-shadow .15s}
#nav.scrolled{box-shadow:0 6px 0 -3px var(--ink)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px}
.logo{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:18px;letter-spacing:-.01em}
.logo b{color:var(--red)}
.logo-dot{display:inline-block;width:8px;height:8px;background:var(--yellow);margin-left:5px;
  border:2px solid var(--ink);vertical-align:middle}
.nav-links{display:none}
@media(min-width:980px){
  .nav-links{display:flex;align-items:center;gap:6px}
  .nav-links a{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:14px;
    padding:6px 10px;transition:background .15s,color .15s}
  .nav-links a:hover{background:var(--yellow);color:var(--ink)}
}
.nav-cta{display:none}
@media(min-width:600px){ .nav-cta{display:inline-flex} }

/* burger */
.burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:46px;height:42px;
  border:var(--bw) solid var(--ink);background:var(--paper)}
.burger span{display:block;height:3px;width:20px;margin:0 auto;background:var(--ink);transition:transform .2s,opacity .2s}
.burger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
@media(min-width:980px){ .burger{display:none} }

/* drawer */
.drawer{position:fixed;top:0;right:0;height:100dvh;width:min(86vw,340px);background:var(--paper);
  border-left:var(--bw) solid var(--ink);z-index:115;transform:translateX(100%);
  transition:transform .26s cubic-bezier(.22,1,.36,1);padding:90px 26px 26px;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer a{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:20px;
  padding:11px 0;border-bottom:2px solid var(--ink)}
.drawer .btn{margin-top:16px}
.drawer-scrim{position:fixed;inset:0;background:rgba(26,26,26,.5);z-index:110;opacity:0;visibility:hidden;
  transition:opacity .26s}
.drawer-scrim.open{opacity:1;visibility:visible}

/* ================= HERO ================= */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;justify-content:center;
  overflow:hidden;border-bottom:var(--bw) solid var(--ink);text-align:center}
#heroShader{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:.4;z-index:0}
.hero-fallback{position:absolute;inset:0;z-index:0;opacity:.5;
  background:
    linear-gradient(135deg,transparent 46%,var(--ink) 46% 47%,transparent 47%),
    radial-gradient(circle at 18% 30%,var(--yellow) 0 8%,transparent 8.5%),
    radial-gradient(circle at 82% 22%,var(--red) 0 6%,transparent 6.5%),
    radial-gradient(circle at 72% 78%,var(--blue) 0 7%,transparent 7.5%);
  background-size:60px 60px,100% 100%,100% 100%,100% 100%}
.hero-in{position:relative;z-index:2;padding:80px 20px}
.hero-title{font-size:clamp(56px,16vw,150px);text-transform:uppercase;letter-spacing:-.03em;margin-bottom:18px}
.hero-title .ot{
  -webkit-text-stroke:2px var(--ink);color:transparent;display:block;
}
@media(min-width:760px){ .hero-title .ot{-webkit-text-stroke:3px var(--ink)} }
.hero-lead{font-family:var(--display);font-weight:700;font-size:clamp(18px,3.4vw,30px);
  max-width:24ch;margin:0 auto 32px;line-height:1.2}
.hero-cta{display:flex;flex-direction:column;gap:16px;justify-content:center;align-items:center}
@media(min-width:600px){ .hero-cta{flex-direction:row} }

/* ================= STATS STRIP ================= */
.stats{display:grid;grid-template-columns:1fr;border-bottom:var(--bw) solid var(--ink)}
@media(min-width:760px){ .stats{grid-template-columns:repeat(3,1fr)} }
.stat{padding:48px 24px;text-align:center;border-bottom:var(--bw) solid var(--ink);
  display:flex;flex-direction:column;align-items:center;justify-content:center}
@media(min-width:760px){ .stat{border-bottom:none;border-right:var(--bw) solid var(--ink)} .stat:last-child{border-right:none} }
.stat:nth-child(1){background:var(--yellow)}
.stat:nth-child(2){background:var(--red);color:var(--ink)}
.stat:nth-child(3){background:var(--blue);color:#fff}
.stat b{font-family:var(--display);font-weight:800;font-size:clamp(54px,10vw,84px);line-height:1;display:block}
.stat span{font-family:var(--display);font-weight:700;text-transform:uppercase;letter-spacing:.08em;
  font-size:15px;margin-top:8px}

/* ================= WHY (cards) ================= */
.why-grid{display:grid;grid-template-columns:1fr;gap:26px;margin-top:36px}
@media(min-width:600px){ .why-grid{grid-template-columns:1fr 1fr} }
@media(min-width:980px){ .why-grid{grid-template-columns:repeat(3,1fr)} }
.why-card{background:var(--surface);border:var(--bw) solid var(--ink);padding:28px 24px;
  box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .15s ease}
.why-card:hover{transform:translate(-3px,-3px)}
.why-card .ic{font-size:38px;line-height:1;margin-bottom:16px}
.why-card.s-yellow{box-shadow:var(--shadow-yellow)}
.why-card.s-red{box-shadow:var(--shadow-red)}
.why-card.s-blue{box-shadow:var(--shadow-blue)}
.why-card h3{text-transform:uppercase;font-size:21px;margin-bottom:10px}
.why-card p{font-size:15.5px;color:var(--muted)}

/* ================= SPEAKERS ================= */
.speakers{background:var(--surface-2)}
.speaker-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:36px}
@media(min-width:760px){ .speaker-grid{grid-template-columns:repeat(4,1fr)} }
.spk{background:var(--paper);border:var(--bw) solid var(--ink);padding:14px;box-shadow:var(--shadow-sm);
  transition:transform .15s ease,box-shadow .15s ease}
.spk:hover{transform:translate(-3px,-3px)}
.spk:nth-child(4n+1):hover{box-shadow:var(--shadow-blue)}
.spk:nth-child(4n+2):hover{box-shadow:var(--shadow-red)}
.spk:nth-child(4n+3):hover{box-shadow:var(--shadow-yellow)}
.spk:nth-child(4n):hover{box-shadow:var(--shadow)}
.spk-photo{width:100%;aspect-ratio:1;border:var(--bw) solid var(--ink);margin-bottom:12px;overflow:hidden;
  background:var(--surface-2);display:flex;align-items:center;justify-content:center}
.spk-photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(1);transition:filter .2s}
.spk:hover .spk-photo img{filter:grayscale(0)}
.spk-photo .ph{font-family:var(--display);font-weight:800;font-size:48px;color:var(--ink);opacity:.25}
.spk.tba .spk-photo{background:repeating-linear-gradient(45deg,var(--surface-2),var(--surface-2) 10px,var(--paper) 10px,var(--paper) 20px)}
.spk h4{text-transform:uppercase;font-size:17px;line-height:1.1}
.spk p{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:12px;opacity:.6;margin-top:4px}
.speakers-foot{margin-top:34px;display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.speakers-foot p{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:15px}

/* ================= TRACKS ================= */
.track-list{display:flex;flex-direction:column;gap:30px;margin-top:36px}
.track{display:flex;flex-direction:column;border:var(--bw) solid var(--ink);box-shadow:var(--shadow);
  transition:transform .15s ease,box-shadow .15s ease}
.track:hover{transform:translate(4px,4px);box-shadow:none}
@media(min-width:860px){ .track{flex-direction:row} }
.track-head{padding:36px;display:flex;flex-direction:column;justify-content:space-between;gap:28px;
  border-bottom:var(--bw) solid var(--ink)}
@media(min-width:860px){ .track-head{width:34%;border-bottom:none;border-right:var(--bw) solid var(--ink)} }
.track-no{font-family:var(--display);font-weight:800;font-size:clamp(56px,9vw,86px);line-height:.9}
.track-name{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:clamp(24px,3.4vw,34px);line-height:1.05}
.track.t1 .track-head{background:var(--yellow)}
.track.t2 .track-head{background:var(--red)}
.track.t3 .track-head{background:var(--blue);color:#fff}
.track-body{padding:36px;background:var(--paper);flex:1}
.track-feats{list-style:none;display:flex;flex-direction:column;gap:16px}
.track-feats li{display:flex;gap:12px;font-family:var(--display);font-weight:600;font-size:16.5px;line-height:1.3}
.track-feats .ck{flex-shrink:0;font-weight:800}
.track.t1 .ck{color:var(--blue)} .track.t2 .ck{color:var(--red)} .track.t3 .ck{color:var(--blue)}
.track-note{display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:14px;letter-spacing:.01em}
.track.t1 .track-note{color:var(--ink)} .track.t2 .track-note{color:var(--red)} .track.t3 .track-note{color:var(--blue)}

/* labs strip under tracks */
.labs{margin-top:30px;border:var(--bw) solid var(--ink);background:var(--ink);color:var(--on-ink);box-shadow:var(--shadow-yellow)}
.labs-head{padding:24px 28px;border-bottom:var(--bw) solid var(--yellow);display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline}
.labs-head h3{color:var(--yellow);text-transform:uppercase;font-size:24px}
.labs-head span{font-family:var(--display);font-weight:600;text-transform:uppercase;font-size:13px;opacity:.8}
.labs-grid{display:grid;grid-template-columns:1fr;gap:1px;background:var(--yellow)}
@media(min-width:640px){ .labs-grid{grid-template-columns:repeat(2,1fr)} }
@media(min-width:980px){ .labs-grid{grid-template-columns:repeat(4,1fr)} }
.lab{background:var(--ink);padding:20px 22px}
.lab b{display:block;font-family:var(--display);text-transform:uppercase;font-size:15px;margin-bottom:5px}
.lab span{font-size:13px;opacity:.7}
.track-foot{margin-top:24px;font-family:var(--display);font-weight:600;font-size:15.5px}

/* ================= TICKETS ================= */
.tickets{background:var(--ink);color:var(--on-ink);text-align:center;border-bottom:var(--bw) solid var(--ink)}
.tickets .sec-title{color:var(--on-ink)}
.tickets .sec-sub{color:rgba(245,240,232,.7);margin-inline:auto}
.ticket{max-width:560px;margin:38px auto 0;background:var(--paper);color:var(--ink);
  border:6px solid var(--yellow);box-shadow:var(--shadow);padding:32px 28px;text-align:left}
.tk-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;margin-bottom:8px}
.tk-tag{background:var(--red);color:#fff;font-family:var(--display);font-weight:800;text-transform:uppercase;
  font-size:12px;padding:5px 11px}
.tk-name{text-transform:uppercase;font-size:clamp(30px,6vw,48px)}
.tk-price{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin:6px 0 22px}
.tk-price b{font-family:var(--display);font-weight:800;font-size:clamp(40px,9vw,64px);line-height:1}
.tk-price .was{font-family:var(--display);font-weight:700;font-size:22px;text-decoration:line-through;opacity:.4}
.tk-price .per{font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:13px;opacity:.6}
.tk-seats{margin-bottom:22px}
.tk-seats-row{display:flex;justify-content:space-between;font-family:var(--display);font-weight:800;
  text-transform:uppercase;font-size:13px;margin-bottom:7px}
.tk-seats-row .fast{color:var(--red)}
.tk-bar{height:26px;border:var(--bw) solid var(--ink);background:var(--surface);padding:3px}
.tk-bar i{display:block;height:100%;width:64%;background:var(--red)}
.tk-incl{list-style:none;display:grid;grid-template-columns:1fr;gap:11px;margin:0 0 26px}
@media(min-width:520px){ .tk-incl{grid-template-columns:1fr 1fr} }
.tk-incl li{display:flex;gap:10px;font-family:var(--display);font-weight:600;font-size:15px}
.tk-incl .ck{color:var(--red);font-weight:800;flex-shrink:0}
.tk-fine{font-family:var(--display);font-weight:600;text-transform:uppercase;font-size:11.5px;opacity:.55;
  text-align:center;margin-top:14px}

/* ================= VENUE ================= */
.venue-in{display:grid;grid-template-columns:1fr;gap:30px;align-items:stretch}
@media(min-width:860px){ .venue-in{grid-template-columns:1.1fr .9fr} }
.venue-copy .venue-points{list-style:none;margin:22px 0 26px;display:flex;flex-direction:column;gap:12px}
.venue-copy .venue-points li{font-family:var(--display);font-weight:600;font-size:16px;
  border-left:5px solid var(--ink);padding-left:12px}
.venue-map{border:var(--bw) solid var(--ink);box-shadow:var(--shadow-blue);background:var(--blue);color:#fff;
  min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px}
.venue-map .pin{font-size:54px;line-height:1}
.venue-map p{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:30px;margin-top:8px}
.venue-map small{display:block;font-family:var(--display);font-weight:600;text-transform:uppercase;font-size:12px;opacity:.85;margin-top:8px}

/* ================= FAQ ================= */
.faq-wrap{max-width:860px}
.faq-list{margin-top:34px;display:flex;flex-direction:column;gap:16px}
.faq-item{border:var(--bw) solid var(--ink);background:var(--surface);box-shadow:var(--shadow-sm)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  gap:16px;padding:20px 22px;font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:17px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-x{position:relative;flex-shrink:0;width:20px;height:20px}
.faq-x::before,.faq-x::after{content:"";position:absolute;background:var(--ink);transition:transform .2s}
.faq-x::before{top:9px;left:0;width:20px;height:3px}
.faq-x::after{left:9px;top:0;width:3px;height:20px}
.faq-item[open] .faq-x::after{transform:scaleY(0)}
.faq-item[open] summary{background:var(--yellow)}
.faq-a{padding:0 22px 22px;font-size:15.5px;color:var(--muted);line-height:1.6}

/* ================= FOOTER ================= */
.footer{background:var(--ink);color:var(--on-ink);padding:64px 0 30px}
.foot-top{display:grid;grid-template-columns:1fr;gap:38px}
@media(min-width:760px){ .foot-top{grid-template-columns:1.4fr 1fr 1fr} }
.foot-brand .logo{color:var(--yellow);font-size:clamp(30px,5vw,46px);line-height:1;display:inline-block;margin-bottom:16px}
.foot-brand .logo b{color:#fff}
.foot-brand p{font-family:var(--display);font-weight:600;font-size:16px;max-width:34ch;opacity:.8;margin-bottom:20px}
.foot-social{display:flex;gap:18px}
.foot-social a{font-family:var(--display);font-weight:800;font-size:24px;text-transform:uppercase;transition:color .15s}
.foot-social a:hover{color:var(--red)}
.foot-col h4{color:var(--yellow);text-transform:uppercase;font-size:16px;margin-bottom:16px}
.foot-col a{display:block;font-family:var(--display);font-weight:700;text-transform:uppercase;font-size:14px;
  padding:5px 0;opacity:.85;transition:color .15s}
.foot-col a:hover{color:var(--red)}
.foot-partners p{font-size:13px;opacity:.6;margin-bottom:14px}
.foot-mail{display:inline-block;background:var(--yellow);color:var(--ink);font-family:var(--display);font-weight:800;
  text-transform:uppercase;font-size:13px;padding:9px 14px;border:2px solid var(--paper)}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(245,240,232,.2);
  display:flex;flex-direction:column;gap:8px;font-family:var(--display);font-weight:700;
  text-transform:uppercase;letter-spacing:.06em;font-size:12px;opacity:.6}
@media(min-width:600px){ .foot-bottom{flex-direction:row;justify-content:space-between} }

/* ================= STICKY MOBILE CTA ================= */
.mobile-cta{position:fixed;bottom:0;left:0;width:100%;z-index:90;background:var(--paper);
  border-top:var(--bw) solid var(--ink);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:14px;
  transform:translateY(110%);transition:transform .25s ease}
.mobile-cta.show{transform:translateY(0)}
.mc-text b{display:block;font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:16px}
.mc-text span{font-family:var(--display);font-weight:600;text-transform:uppercase;font-size:11px;opacity:.6}
@media(min-width:980px){ .mobile-cta{display:none!important} }

/* ================= REVEAL ================= */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .ticker-track{animation:none}
}