:root{
  --bg:#fbfaf6;
  --paper:#fffdf7;
  --ink:#171716;
  --muted:#6f6b62;
  --rule:#d7d0c3;
  --rule-strong:#b6ac99;
  --accent:#c94a25;
  --accent-soft:#f3dfd5;
  --green:#3d705b;
  --green-soft:#dfece4;
  --copy:#393733;
  --placeholder-bg:#ece7de;
  --mono:ui-monospace,"SF Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --wrap:1080px;
  --sidebar:220px;
  --col-gap:56px;
  --header-h:76px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  line-height:1.56;
  text-rendering:optimizeLegibility;
}
::selection{background:rgba(201,74,37,.22);}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px;}
a:hover{color:var(--accent);}
img{display:block;max-width:100%;}
h1,h2,h3,p{margin:0;}

/* Shared page width — header and layout use the same wrapper so everything
   lines up on one left edge. */
.wrap{width:min(var(--wrap),calc(100% - 44px));margin-inline:auto;}

/* ---------- Buttons ---------- */
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:42px;padding:0 18px;
  border:1px solid var(--ink);border-radius:999px;
  background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:.82rem;letter-spacing:.01em;
  text-decoration:none;white-space:nowrap;
  transition:background .15s ease,border-color .15s ease,color .15s ease;
}
.button:hover{background:var(--accent);border-color:var(--accent);color:var(--paper);}

/* ---------- Brand ---------- */
.brand{
  display:inline-flex;align-items:baseline;gap:9px;
  color:var(--accent);text-decoration:none;
}
.brand:hover{color:var(--accent);}
.mark{width:28px;height:28px;flex:0 0 auto;align-self:center;}
.mark .ring{transform-origin:50% 50%;animation:spin 13s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}
.word{
  font-family:var(--mono);font-size:1.2rem;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;line-height:1;
}
.version{
  align-self:center;color:var(--muted);
  font-family:var(--mono);font-size:.7rem;
}

/* ---------- Sticky top header ---------- */
.topbar{
  position:sticky;top:0;z-index:20;
  background:var(--bg);
  border-bottom:1px solid var(--rule);
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:var(--header-h);
}
.topbar-cta{flex:0 0 auto;}
.topbar-right{display:flex;align-items:center;gap:14px;}

/* Kicker line, shown in the header on desktop only — no room for it on mobile. */
.header-kicker{
  margin:0;color:var(--accent);
  font-family:var(--mono);font-size:.78rem;
  text-transform:uppercase;letter-spacing:.04em;
}

/* Hamburger button — hidden on desktop, shown on mobile via the media query. */
.nav-toggle{
  display:none;
  width:40px;height:40px;padding:0;
  background:transparent;border:1px solid var(--rule);border-radius:8px;
  cursor:pointer;align-items:center;justify-content:center;
  color:var(--ink);
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";display:block;
  width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.nav-toggle-bars{position:relative;}
.nav-toggle-bars::before{position:absolute;top:-6px;left:0;}
.nav-toggle-bars::after{position:absolute;top:6px;left:0;}
/* Morph to an X when the menu is open. */
.nav-open .nav-toggle-bars{background:transparent;}
.nav-open .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg);}
.nav-open .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg);}

/* Dropdown menu panel — collapsed by default, only used on mobile. */
.nav-menu{
  display:none;
  border-top:1px solid var(--rule);
  background:var(--bg);
}
.nav-menu ol{
  list-style:none;margin:0;padding:10px 0;
  counter-reset:navtoc;
  width:min(var(--wrap),calc(100% - 44px));margin-inline:auto;
}
.nav-menu li{counter-increment:navtoc;}
.nav-menu a{
  display:grid;grid-template-columns:2.4em 1fr;align-items:baseline;
  padding:11px 4px;color:var(--ink);text-decoration:none;
  border-bottom:1px solid var(--rule);
}
.nav-menu li:last-child a{border-bottom:0;}
.nav-menu a::before{
  content:counter(navtoc,decimal-leading-zero);
  color:var(--accent);font-family:var(--mono);font-size:.72rem;
}

/* ---------- Two-column layout ---------- */
.layout{
  display:grid;
  grid-template-columns:var(--sidebar) minmax(0,1fr);
  gap:var(--col-gap);
  align-items:start;
  padding:40px 0 80px;
}
.page{min-width:0;max-width:720px;}

/* ---------- Sidebar ToC (sticks below the header) ---------- */
.sidebar{position:sticky;top:calc(var(--header-h) + 28px);align-self:start;}
.toc-label{
  margin:0 0 14px;color:var(--muted);
  font-family:var(--mono);font-size:.7rem;
  text-transform:uppercase;letter-spacing:.1em;
}
.toc ol{
  margin:0;padding:0;list-style:none;
  counter-reset:toc;
  border-left:1px solid var(--rule);
}
.toc li{counter-increment:toc;}
.toc ol a{
  display:grid;grid-template-columns:2.1em 1fr;align-items:baseline;
  padding:6px 0 6px 14px;margin-left:-1px;
  border-left:1px solid transparent;
  color:var(--muted);text-decoration:none;
  font-size:.9rem;line-height:1.3;
}
.toc ol a::before{
  content:counter(toc,decimal-leading-zero);
  color:var(--accent);font-family:var(--mono);font-size:.7rem;
}
.toc ol a:hover{color:var(--ink);border-left-color:var(--accent);}

/* ---------- Site nav (cross-page links, below the ToC) ---------- */
.site-nav{margin-top:28px;}
.site-nav ul{margin:0;padding:0;list-style:none;border-left:1px solid var(--rule);}
.site-nav a{
  display:block;padding:6px 0 6px 14px;margin-left:-1px;
  border-left:1px solid transparent;
  color:var(--muted);text-decoration:none;
  font-size:.9rem;line-height:1.3;
}
.site-nav a:hover{color:var(--ink);border-left-color:var(--accent);}

/* In the mobile dropdown it sits below the ToC rows, styled to match them
   (full-width rows) rather than the desktop sidebar's left-rule list. */
.nav-menu .site-nav{margin-top:0;border-top:1px solid var(--rule);}
.nav-menu .site-nav ul{
  border-left:0;
  width:min(var(--wrap),calc(100% - 44px));margin-inline:auto;
}
.nav-menu .site-nav a{
  padding:11px 4px;margin-left:0;color:var(--ink);
  border-left:0;border-bottom:1px solid var(--rule);
}
.nav-menu .site-nav li:last-child a{border-bottom:0;}

/* ---------- Hero actions ---------- */
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

/* ---------- Hero ---------- */
.hero{margin-bottom:36px;}
h1{max-width:680px;font-size:clamp(2.3rem,6.4vw,4.3rem);line-height:.98;}
.dek{
  max-width:640px;margin:22px 0 0;color:var(--copy);
  font-size:clamp(1.05rem,2.1vw,1.25rem);line-height:1.42;
}
.dek + .dek{margin-top:10px;}

/* ---------- Fact tiles ---------- */
.facts{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  border-top:1px solid var(--rule);border-left:1px solid var(--rule);
  margin:24px 0 30px;background:var(--paper);
}
.fact{min-height:92px;padding:15px 16px;border-right:1px solid var(--rule);border-bottom:1px solid var(--rule);}
.label{margin:0 0 7px;color:var(--muted);font-family:var(--mono);font-size:.72rem;text-transform:uppercase;}
.value{font-weight:640;line-height:1.3;}

/* ---------- Photo strip ---------- */
.photo-strip{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:22px;}
.photo-strip figure{position:relative;margin:0;overflow:hidden;border:1px solid var(--rule);background:var(--placeholder-bg);}
.photo-strip img{width:100%;height:210px;object-fit:cover;filter:saturate(.92) contrast(1.02);cursor:zoom-in;}
/* ---------- Lightbox (click a photo-strip image to enlarge) ---------- */
.lightbox{
  display:none;position:fixed;inset:0;z-index:100;
  align-items:center;justify-content:center;padding:32px;
  background:rgba(23,23,22,.92);
}
.lightbox.open{display:flex;}
.lightbox figure{
  margin:0;max-width:100%;max-height:100%;
  display:flex;flex-direction:column;align-items:center;gap:12px;
}
.lightbox img{max-width:100%;max-height:80vh;object-fit:contain;box-shadow:0 20px 60px rgba(0,0,0,.4);}
.lightbox figcaption{color:#fff;font-family:var(--mono);font-size:.82rem;text-align:center;}
.lightbox-close{
  position:absolute;top:20px;right:24px;
  width:40px;height:40px;padding:0;
  border:1px solid rgba(255,255,255,.3);border-radius:8px;
  background:transparent;color:#fff;font-size:1.4rem;line-height:1;
  cursor:pointer;
}
.lightbox-close:hover{background:rgba(255,255,255,.12);}

/* ---------- Sections (auto-numbered) ---------- */
.content{counter-reset:section;}
.content > section{scroll-margin-top:calc(var(--header-h) + 16px);border-top:2px solid var(--rule-strong);padding-top:34px;margin-top:34px;}
/* A section's bg_image, full-bleed and fixed to the viewport so it stays
   put behind the page while it scrolls. */
.content-bg{
  position:fixed;inset:0;
  width:100%;height:100%;
  object-fit:cover;object-position:center top;
  opacity:.05;z-index:-1;filter:grayscale(1);
  pointer-events:none;user-select:none;
}
.content > section > h2{
  counter-increment:section;
  margin:0 0 17px;
  font-size:clamp(1.4rem,2.8vw,2rem);line-height:1.08;
  display:flex;align-items:baseline;gap:13px;
}
.content > section > h2::before{
  content:counter(section,decimal-leading-zero);
  color:var(--accent);font-family:var(--mono);font-size:.76rem;font-weight:400;
}
h3{font-size:1.02rem;line-height:1.25;}
.copy{color:var(--copy);font-size:1.03rem;}
.copy + .copy{margin-top:13px;}

/* ---------- Plain list ---------- */
.plain-list{margin:18px 0 0;padding:0;list-style:none;border-top:1px solid var(--rule);}
.plain-list li{padding:9px 0;border-bottom:1px solid var(--rule);color:var(--copy);}

/* ---------- Schedule ---------- */
.rows{border-top:1px solid var(--rule);margin-top:18px;}
.row{display:grid;grid-template-columns:128px minmax(0,1fr);gap:18px;padding:15px 0;border-bottom:1px solid var(--rule);}
.row .when{color:var(--accent);font-family:var(--mono);font-size:.82rem;}
.row p{margin:5px 0 0;color:var(--muted);}
.day{margin-top:22px;}
.day-label{
  display:inline-block;padding:4px 9px;
  background:var(--accent-soft);color:var(--accent);
  font-family:var(--mono);font-size:.8rem;font-weight:700;
}

/* ---------- Item list (hardware / credits) ---------- */
.list{display:grid;margin-top:18px;border-top:1px solid var(--rule);}
.item{display:grid;grid-template-columns:104px minmax(0,1fr);gap:18px;padding:14px 0;border-bottom:1px solid var(--rule);}
.tag{
  align-self:start;justify-self:start;
  padding:3px 9px;border-radius:999px;
  color:var(--green);background:var(--green-soft);
  font-family:var(--mono);font-size:.72rem;white-space:nowrap;
}
.item p{margin:5px 0 0;color:var(--muted);}

/* ---------- People grid (judges / speakers) ---------- */
.people-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:26px 22px;margin-top:20px;
}
.person{display:flex;flex-direction:column;gap:12px;}
.person-photo{
  width:60px;height:60px;border-radius:50%;
  object-fit:cover;border:1px solid var(--rule);background:var(--placeholder-bg);
}
.person-photo-placeholder{
  display:flex;align-items:center;justify-content:center;
  color:var(--accent);background:var(--accent-soft);
  font-family:var(--mono);font-size:1.05rem;font-weight:700;
  text-transform:uppercase;
}
/* Their actual role on the team — a small badge, distinct from the (often
   joke) title below it. */
.person-hackrole{margin-top:3px;color:var(--muted);font-family:var(--mono);font-size:.76rem;}
.person-role{margin-top:3px;color:var(--muted);font-family:var(--mono);font-size:.76rem;}
.person-bio{margin-top:7px;color:var(--copy);font-size:.92rem;line-height:1.42;}

/* ---------- Tier comparison table ---------- */
.tier-table-wrap{margin-top:18px;overflow-x:auto;border-top:1px solid var(--rule);}
.tier-table{width:100%;min-width:640px;border-collapse:collapse;}
.tier-table th,.tier-table td{padding:12px 14px;border-bottom:1px solid var(--rule);text-align:center;}
.tier-table td:first-child,.tier-table th:first-child{padding-left:0;}
.tier-table thead th{vertical-align:bottom;padding-top:16px;}
.tier-name{display:block;font-weight:640;font-size:.92rem;}
.tier-price{
  display:block;margin-top:4px;color:var(--accent);
  font-family:var(--mono);font-size:.76rem;font-weight:400;
}
.tier-table th[scope="row"]{
  min-width:200px;padding-right:20px;
  text-align:left;font-weight:400;color:var(--copy);font-size:.92rem;
}
.tier-yes{color:var(--green);font-size:1.05rem;}
.tier-no{color:var(--rule);}
.tier-table tbody tr:hover{background:var(--paper);}

/* ---------- Note box ---------- */
.note-box{margin-top:18px;padding:15px 16px;border:1px solid var(--rule);background:var(--paper);}
.note-box p{color:var(--copy);}
.note-box p + p{margin-top:9px;}

/* ---------- Details / FAQ ---------- */
details{border-top:1px solid var(--rule);}
details:last-of-type{border-bottom:1px solid var(--rule);}
/* Avoid a doubled rule when a disclosure follows a bordered card list. */
.list + details{border-top:0;}
summary{cursor:pointer;padding:15px 0;list-style:none;font-weight:640;display:flex;gap:10px;}
summary::-webkit-details-marker{display:none;}
summary::before{content:"+";width:14px;color:var(--accent);font-family:var(--mono);flex:0 0 auto;}
details[open] summary::before{content:"–";}
details p{margin:0 0 16px 24px;color:var(--muted);}
.citylinks ul{margin:0 0 16px 24px;padding:0;list-style:none;}
.citylinks li{padding:4px 0;color:var(--muted);}
.citylinks .place{color:var(--muted);font-family:var(--mono);font-size:.78rem;}

/* ---------- Partner logo band (end of a section) ---------- */
.partners{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;align-items:start;
  margin-top:32px;padding-top:28px;
  border-top:1px solid var(--rule);
}
.partner-label{
  margin:0 0 14px;color:var(--muted);
  font-family:var(--mono);font-size:.7rem;
  text-transform:uppercase;letter-spacing:.14em;
}
.partner-logo{
  display:inline-flex;flex-direction:column;align-items:flex-start;gap:8px;
  color:var(--accent);text-decoration:none;
}
.partner-logo:hover{color:var(--accent);}
.partner-chip{
  display:inline-flex;padding:12px 14px;
  background:#fff;border:1px solid var(--rule);border-radius:6px;
}
.partner-chip img{height:30px;width:auto;display:block;}
.partner-svg{display:inline-flex;color:var(--accent);}
.partner-svg svg{height:34px;width:auto;display:block;}
.partner-sub{
  color:var(--ink);font-style:italic;font-size:.82rem;
}

/* ---------- Sponsors section (optional tiers) ---------- */
.sponsor-tier{margin-top:22px;}
.sponsor-tier:first-of-type{margin-top:18px;}
.tier-label{
  margin:0 0 12px;color:var(--accent);
  font-family:var(--mono);font-size:.72rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.12em;
}
.sponsor-grid{
  display:flex;flex-wrap:wrap;gap:14px 20px;align-items:center;
}
.sponsor-logo{
  display:inline-flex;color:var(--accent);text-decoration:none;
}
.sponsor-logo:hover{color:var(--accent);}
.sponsor-name{
  display:inline-flex;align-items:center;
  padding:12px 16px;border:1px dashed var(--rule);border-radius:6px;
  color:var(--muted);font-family:var(--mono);font-size:.85rem;
}
/* Tier sizes control logo height. */
.sponsor-grid.xl .partner-chip img,.sponsor-grid.xl .partner-svg svg{height:130px;}
.sponsor-grid.lg .partner-chip img,.sponsor-grid.lg .partner-svg svg{height:44px;}
.sponsor-grid.md .partner-chip img,.sponsor-grid.md .partner-svg svg{height:32px;}
.sponsor-grid.sm .partner-chip img,.sponsor-grid.sm .partner-svg svg{height:24px;}
.sponsor-note{margin-top:18px;color:var(--muted);font-family:var(--mono);font-size:.72rem;}

/* ---------- Footer ---------- */
.footer{margin-top:44px;padding-top:24px;border-top:1px solid var(--rule);color:var(--muted);font-family:var(--mono);font-size:.75rem;}
.footer p + p{margin-top:8px;}

/* ---------- Responsive ---------- */
@media (max-width:860px){
  .layout{grid-template-columns:1fr;gap:0;padding-top:28px;}
  /* Replace the stacked sidebar ToC with a hamburger menu in the header. */
  .sidebar{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-open .nav-menu{display:block;}
  .header-kicker{display:none;}
}
@media (max-width:620px){
  :root{--header-h:62px;}
  .topbar-cta{display:none;}
  .facts{grid-template-columns:1fr;}
  .photo-strip{grid-template-columns:1fr;gap:8px;}
  .photo-strip img{height:220px;}
  .row,.item{grid-template-columns:1fr;gap:6px;}
  .partners{grid-template-columns:1fr;gap:28px;}
  .tier-table th,.tier-table td{padding:10px;}
  .tier-table th[scope="row"]{min-width:160px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .mark .ring{animation:none;}
}

/* ---------- Dark mode ----------
   Applied via [data-theme], set by the inline script in base.html: it
   defaults to the OS setting and remembers a manual override. */
:root[data-theme="dark"]{
  --bg:#15140f;--paper:#1c1a15;--ink:#f0ede4;--muted:#9a9484;
  --rule:#33302a;--rule-strong:#4a453c;
  --accent:#e2704a;--accent-soft:#3a2620;
  --green:#5ea98a;--green-soft:#1f3a2e;
  --copy:#d8d4c8;--placeholder-bg:#2a271f;
}
[data-theme="dark"] .partner-chip{background:#e8e4d8;}
[data-theme="dark"] .content-bg{filter:invert(1) grayscale(1);}

/* ---------- Theme toggle button ---------- */
.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;padding:0;
  border:1px solid var(--rule);border-radius:8px;
  background:transparent;color:var(--ink);cursor:pointer;
}
.theme-toggle svg{width:18px;height:18px;}
.theme-toggle .icon-sun{display:none;}
[data-theme="dark"] .theme-toggle .icon-moon{display:none;}
[data-theme="dark"] .theme-toggle .icon-sun{display:block;}