:root{
  --ink:#0a0e14;
  --ink-soft:#131a24;
  --blue:#00539b;
  --blue-deep:#003561;
  --blue-soft:#5f9fd4;
  --silver:#aab2bd;
  --silver-light:#e9ecf1;
  --paper:#f7f8fa;
  --white:#ffffff;
  --line:#dde1e8;
  --line-dark:#232c3a;
  --display: 'Space Grotesk', sans-serif;
  --body: 'Inter', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img,svg{display:block;max-width:100%;}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
h1,h2,h3{font-family:var(--display);margin:0;line-height:1.05;letter-spacing:-0.01em;}
p{margin:0;}
.mark{display:block;}

/* ---------- NAV ---------- */
header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,0.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px;}
.wrap.nav{padding:0 16px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand .mark{height:32px;width:auto;}
.brand-text{font-family:var(--display);font-weight:700;font-size:16.5px;letter-spacing:0.01em;line-height:1.15;}
.brand-text span{display:block;color:var(--blue);}
nav.links{display:flex;align-items:center;gap:36px;}
nav.links a.nav-link{font-size:14.5px;font-weight:500;color:#4a5361;position:relative;padding:4px 0;}
nav.links a.nav-link.current{color:var(--ink);}
nav.links a.nav-link:hover{color:var(--ink);}
nav.links a.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--blue);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;}
nav.links a.nav-link:hover::after,nav.links a.nav-link.current::after{transform:scaleX(1);}
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--body);font-weight:600;font-size:14.5px;padding:11px 22px;border-radius:3px;border:1.5px solid transparent;cursor:pointer;transition:all .18s ease;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-deep);}
.btn-ghost-dark{border-color:rgba(255,255,255,0.35);color:#fff;}
.btn-ghost-dark:hover{border-color:#fff;background:rgba(255,255,255,0.08);}
.btn-ghost-light{border-color:#c9ced7;color:var(--ink);}
.btn-ghost-light:hover{border-color:var(--ink);}
.btn-on-blue{background:#fff;color:var(--blue-deep);}
.btn-on-blue:hover{background:var(--silver-light);}

/* ---------- PAGE HEADER (non-home pages) ---------- */
.page-header{background:var(--ink);color:#fff;padding:180px 0 132px;position:relative;overflow:hidden;}
.page-header .wrap{position:relative;z-index:2;}
.page-header .section-tag{color:var(--blue-soft);}
.page-header h1{font-size:clamp(42px,6vw,68px);color:#fff;}
.page-header p{color:#a7aebb;font-size:18px;max-width:560px;margin-top:18px;line-height:1.6;}

/* ---------- HERO (home only) ---------- */
.hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:132px 0 0;}
.hero-circuit{position:absolute;inset:0;opacity:0.16;pointer-events:none;}
.hero-grid{position:relative;z-index:2;}
.hero-copy{max-width:1000px;}
.hero-eyebrow{font-family:var(--mono);font-size:13px;color:var(--blue-soft);letter-spacing:0.02em;margin-bottom:40px;}
.hero h1{font-size:clamp(48px, 6.4vw, 72px);font-weight:700;color:#fff;margin-top:24px;}
.hero h1 .accent{color:var(--blue-soft);}
.hero-sub{font-size:20px;color:#c3c9d3;max-width:760px;margin-top:24px;line-height:1.55;}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap;margin-top:32px;font-family:var(--mono);font-size:13.5px;color:#8f97a5;}
.hero-meta strong{color:#fff;font-weight:500;}
.hero-actions{display:flex;gap:14px;margin-top:38px;padding-bottom:88px;flex-wrap:wrap;}

.jagged{display:block;width:100%;height:34px;background:var(--paper);clip-path:polygon(0% 100%,0% 40%,4% 0%,9% 55%,14% 10%,19% 60%,24% 5%,29% 50%,34% 0%,39% 55%,44% 15%,49% 60%,54% 0%,59% 50%,64% 10%,69% 55%,74% 5%,79% 60%,84% 0%,89% 50%,94% 15%,100% 60%,100% 100%);}
.jagged.on-ink{background:var(--ink);}

/* ---------- STATS STRIP ---------- */
.stats{background:var(--paper);border-bottom:1px solid var(--line);}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);padding:52px 0;gap:20px;}
.stat{border-left:1px solid var(--line);padding-left:22px;}
.stat:first-child{border-left:none;padding-left:0;}
.stat .num{font-family:var(--display);font-size:38px;font-weight:700;color:var(--blue);}
.stat .label{font-size:13.5px;color:#5c6472;margin-top:4px;}
.about-line{max-width:760px;font-size:17px;color:#333c48;line-height:1.6;padding:40px 0 40px;}

/* ---------- SPONSOR RIBBON (home) ---------- */
.logo-ribbon{background:#fff;border-bottom:1px solid var(--line);overflow:hidden;padding:28px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);}
.ribbon-track{display:flex;width:max-content;animation:ribbon 42s linear infinite;}
.logo-ribbon:hover .ribbon-track{animation-play-state:paused;}
.ribbon-set{display:flex;align-items:center;gap:72px;padding-right:72px;}
.ribbon-set a{display:flex;align-items:center;flex:none;height:52px;}
.ribbon-set img{height:46px;width:auto;max-width:220px;object-fit:contain;}
@keyframes ribbon{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@media (prefers-reduced-motion:reduce){
  .ribbon-track{animation:none;}
}

/* ---------- TEASER LINKS (home) ---------- */
.teasers{background:#fff;padding:96px 0;}
.teaser-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:52px;}
.teaser-card{background:#fff;padding:40px;display:flex;flex-direction:column;justify-content:space-between;min-height:220px;transition:background .18s ease;}
.teaser-card:hover{background:var(--paper);}
.teaser-kicker{font-family:var(--mono);font-size:12px;color:var(--blue);text-transform:uppercase;letter-spacing:0.05em;}
.teaser-card h3{font-size:26px;margin-top:12px;}
.teaser-card p.desc{color:#5c6472;font-size:15px;margin-top:10px;line-height:1.55;}
.teaser-go{font-weight:600;font-size:14px;color:var(--blue);margin-top:22px;}

/* ---------- SECTION HEADS ---------- */
.section{padding:96px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:52px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(30px,3.6vw,42px);}
.section-head p{color:#5c6472;font-size:15.5px;max-width:380px;line-height:1.55;}
.section-tag{font-family:var(--mono);font-size:12.5px;color:var(--blue);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:10px;display:block;}
.on-dark .section-tag{color:var(--blue-soft);}
.on-dark .section-head p{color:#a7aebb;}

/* ---------- SCHEDULE ---------- */
.schedule{background:#fff;}
.day-tabs{display:flex;gap:8px;margin-bottom:36px;}
.day-tab{font-family:var(--mono);font-size:13px;padding:9px 18px;border:1px solid var(--line);border-radius:3px;color:#5c6472;background:#fff;cursor:pointer;transition:all .15s ease;}
.day-tab:hover{border-color:var(--ink);color:var(--ink);}
.day-tab.active{background:var(--ink);color:#fff;border-color:var(--ink);}
.day-panel{display:none;}
.day-panel.active{display:block;}
.timeline{border-top:1px solid var(--line);}
.t-row{display:grid;grid-template-columns:120px 1fr;gap:24px;padding:22px 0;border-bottom:1px solid var(--line);}
.t-time{font-family:var(--mono);font-size:13.5px;color:var(--blue);padding-top:2px;}
.t-title{font-weight:600;font-size:16px;}
.t-desc{color:#5c6472;font-size:14.5px;margin-top:4px;line-height:1.5;}

/* ---------- TRACKS ---------- */
.tracks{background:#fff;color:var(--ink);}
.track-group-label{display:flex;align-items:center;gap:14px;margin:0 0 24px;}
.track-group-label .n{font-family:var(--mono);font-size:12px;color:var(--blue);text-transform:uppercase;letter-spacing:0.06em;}
.track-group-label .rule{flex:1;height:1px;background:var(--line);}
.track-featured{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:72px;}
.track-featured .track-card{min-height:260px;padding:44px 38px;justify-content:flex-start;}
.track-featured .track-name{font-size:28px;}
.track-featured .track-desc{font-size:15px;max-width:340px;}
.track-featured.industry{margin-bottom:0;}
.track-card{background:#fff;padding:30px 26px;min-height:190px;display:flex;flex-direction:column;justify-content:space-between;}
.track-card:hover{background:var(--paper);}
.track-icon{width:44px;height:44px;border-radius:10px;background:#eaf1f8;display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.track-icon svg{width:22px;height:22px;color:var(--blue);}
.track-kind{font-family:var(--mono);font-size:11px;letter-spacing:0.04em;text-transform:uppercase;color:var(--blue);}
.track-name{font-family:var(--display);font-size:20px;font-weight:600;margin-top:14px;color:var(--ink);}
.track-desc{color:#5c6472;font-size:13.5px;line-height:1.55;margin-top:10px;}

/* ---------- PRIZES ---------- */
.prizes{background:#fff;}
.prize-grid{display:grid;gap:20px;}
.prize-grid.places{grid-template-columns:repeat(3,1fr);margin-bottom:72px;}
.prize-grid.tracks{grid-template-columns:repeat(2,1fr);}
.prize-card{background:#fff;border:1px solid var(--line);padding:44px 38px;min-height:240px;display:flex;flex-direction:column;}
.prize-card:hover{background:var(--paper);}
.prize-place{font-family:var(--mono);font-weight:700;font-size:12px;letter-spacing:0.04em;text-transform:uppercase;color:var(--blue);}
.prize-amount{font-family:var(--display);font-size:28px;font-weight:600;margin-top:16px;line-height:1.15;color:var(--ink);}
.prize-detail{color:#5c6472;font-size:15px;line-height:1.55;margin-top:10px;}
.prize-sponsor{color:#5c6472;font-size:14.5px;line-height:1.5;margin-top:14px;}
.prize-card > .prize-sponsor:last-child{margin-top:auto;padding-top:28px;}
.prize-also{margin-top:28px;padding-top:28px;border-top:1px solid var(--line);}
.prize-sponsor a{color:var(--blue);font-weight:600;}
.prize-sponsor a:hover{text-decoration:underline;}

/* ---------- SPONSORS ---------- */
.sponsors{background:#fff;}
.sponsor-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.sponsor-card{background:#fff;border:1px solid var(--line);min-height:180px;display:flex;align-items:center;justify-content:center;padding:36px 32px;}
.sponsor-card:hover{background:var(--paper);}
.sponsor-card img{width:100%;height:84px;object-fit:contain;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:24px 0;display:flex;justify-content:space-between;align-items:center;gap:20px;font-family:var(--body);font-weight:600;font-size:16px;color:var(--ink);}
.faq-q .plus{font-family:var(--mono);font-size:18px;color:var(--blue);transition:transform .2s ease;flex:none;}
.faq-item.open .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-item.open .faq-a{max-height:400px;}
.faq-a-inner{padding:0 0 24px;color:#5c6472;font-size:14.5px;line-height:1.65;max-width:900px;}


/* ---------- CODE OF CONDUCT ---------- */
.conduct-body{max-width:720px;}
.conduct-body h3{font-size:19px;margin-top:40px;margin-bottom:14px;}
.conduct-body h3:first-child{margin-top:0;}
.conduct-body p{color:#3a4250;font-size:15.5px;line-height:1.7;margin-bottom:14px;}
.conduct-body a.email{color:var(--blue);font-weight:600;}

/* ---------- CTA BAND ---------- */
.cta-band{background:var(--blue);color:#fff;padding:90px 0;}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap;}
.cta-inner h2{font-size:clamp(28px,3.4vw,38px);max-width:520px;}
.cta-note{font-size:14px;color:#cfe0f0;margin-top:10px;}

/* ---------- FOOTER ---------- */
footer{background:var(--ink);color:#8f97a5;padding:64px 0 36px;}
.foot-top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;padding-bottom:44px;border-bottom:1px solid var(--line-dark);}
.foot-brand .mark{height:34px;width:auto;margin-bottom:14px;}
.foot-brand p{font-size:14px;max-width:280px;line-height:1.6;}
.foot-cols{display:flex;gap:64px;flex-wrap:wrap;}
.foot-col h4{font-family:var(--body);font-size:13px;color:#fff;font-weight:600;margin-bottom:14px;}
.foot-col a{display:block;font-size:14px;color:#8f97a5;margin-bottom:10px;}
.foot-col a:hover{color:#fff;}
.foot-bottom{display:flex;justify-content:space-between;padding-top:28px;font-size:13px;flex-wrap:wrap;gap:10px;}

@media (max-width: 860px){
  nav.links{display:none;}
  .stats-row{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(3){border-left:none;padding-left:0;}
  .teaser-grid{grid-template-columns:1fr;}
  .track-featured{grid-template-columns:1fr;}
  .prize-grid.places,.prize-grid.tracks,.sponsor-grid{grid-template-columns:1fr;}
  .t-row{grid-template-columns:1fr;gap:6px;}
  .foot-top{flex-direction:column;}
}