/* GRID CONGRESS — Swiss/International revival
   Palette: Klein blue #0F1FCB · paper #F4F1EA · black #111 · red #E63312 */

:root{
  --blue:#0F1FCB;
  --paper:#F4F1EA;
  --ink:#111111;
  --red:#E63312;
  --line:rgba(17,17,17,.18);
  --gutter:clamp(12px,1.5vw,24px);
  --pad:clamp(20px,4vw,64px);
  --t:.3s cubic-bezier(.25,0,.15,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Inter Tight",Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.45;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--blue);color:var(--paper)}
a{color:inherit;text-decoration:none}

/* scrollbar */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--paper)}
::-webkit-scrollbar-thumb{background:var(--blue);border:2px solid var(--paper)}
html{scrollbar-color:var(--blue) var(--paper);scrollbar-width:thin}

/* ---------- exposed 12-col grid overlay ---------- */
.gridlines{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  padding:0 var(--pad);
  display:grid;grid-template-columns:repeat(12,1fr);
}
.gridlines i{border-left:1px solid var(--line)}
.gridlines i:last-child{border-right:1px solid var(--line)}
@media(max-width:760px){
  .gridlines{grid-template-columns:repeat(4,1fr)}
  .gridlines i:nth-child(n+5){display:none}
}

main,header.top,footer{position:relative;z-index:1}

/* ---------- shared grid container ---------- */
.g{
  padding-left:var(--pad);padding-right:var(--pad);
  display:grid;grid-template-columns:repeat(12,1fr);
  column-gap:0;
}

/* ---------- type scale ---------- */
.d1{font-size:clamp(64px,13.5vw,208px);line-height:.86;letter-spacing:-.045em;font-weight:800;text-transform:uppercase}
.d2{font-size:clamp(40px,7vw,110px);line-height:.9;letter-spacing:-.04em;font-weight:800;text-transform:uppercase}
.d3{font-size:clamp(26px,3.6vw,54px);line-height:.95;letter-spacing:-.03em;font-weight:700;text-transform:uppercase}
.h-sm{font-size:13px;letter-spacing:.14em;text-transform:uppercase;font-weight:600}
.mono-num{font-variant-numeric:tabular-nums}
.blue{color:var(--blue)}
.red{color:var(--red)}

/* ---------- top masthead bar ---------- */
header.top{
  border-bottom:1px solid var(--ink);
  position:sticky;top:0;background:var(--paper);z-index:10;
}
header.top .g{align-items:stretch}
.brand{
  grid-column:1/span 4;
  padding:14px 0;
  font-weight:800;letter-spacing:-.02em;font-size:18px;text-transform:uppercase;
  display:flex;align-items:center;gap:6px;
}
.brand .ast{color:var(--red);font-size:22px;line-height:0;transform:translateY(2px)}
nav.mainnav{
  grid-column:6/span 7;
  display:flex;justify-content:flex-end;gap:0;
}
nav.mainnav a{
  padding:14px 18px;font-size:13px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;
  border-left:1px solid var(--ink);
  transition:background var(--t),color var(--t);
}
nav.mainnav a:hover{background:var(--ink);color:var(--paper)}
nav.mainnav a.reg{background:var(--red);color:var(--paper)}
nav.mainnav a.reg:hover{background:var(--blue)}
@media(max-width:760px){
  .brand{grid-column:1/span 6}
  nav.mainnav{grid-column:7/span 6;justify-content:flex-end}
  nav.mainnav a{padding:14px 10px;font-size:11px;letter-spacing:.08em}
  nav.mainnav a:not(.reg){display:none}
}

/* ---------- hero ---------- */
.hero{border-bottom:1px solid var(--ink);position:relative;overflow:hidden}
.hero-meta{
  padding-top:22px;padding-bottom:clamp(24px,4vw,56px);
}
.hero-meta .cell{grid-column:span 3;font-size:13px;line-height:1.5}
.hero-meta .cell strong{display:block;letter-spacing:.14em;text-transform:uppercase;font-size:11px;color:var(--blue);margin-bottom:4px}
.hero-title{padding-bottom:0}
.hero-title h1{grid-column:1/span 12}
.hero-title h1 .l2{color:var(--blue);display:block}
.hero-title h1 .ast-big{color:var(--red);display:inline-block;transform:translateY(-.04em)}
.hero-strip{
  border-top:1px solid var(--ink);
  margin-top:clamp(24px,4vw,56px);
}
.hero-strip .g{min-height:clamp(120px,16vw,220px)}
.hero-fields{grid-column:1/span 8;display:grid;grid-template-columns:repeat(8,1fr)}
.field{border-right:1px solid var(--ink)}
.field.b{background:var(--blue)}
.field.r{background:var(--red)}
.field.k{background:var(--ink)}
.hero-claim{
  grid-column:9/span 3;
  padding:18px 24px 18px 24px;
  background:var(--paper);
  font-size:clamp(15px,1.4vw,20px);line-height:1.35;font-weight:500;
  display:flex;flex-direction:column;justify-content:space-between;gap:16px;
}
.hero-claim .h-sm{color:var(--red)}

/* giant rotated date block */
.dateblock{
  position:absolute;right:calc(var(--pad) * .3);top:50%;
  transform:translateY(-50%) rotate(90deg);transform-origin:center;
  font-size:clamp(30px,4.4vw,64px);font-weight:800;letter-spacing:-.04em;
  color:var(--blue);white-space:nowrap;line-height:1;
  pointer-events:none;
}
.dateblock span{color:var(--red)}
@media(max-width:1100px){.dateblock{display:none}}
.hero.has-date .hero-title h1{grid-column:1/span 10}
@media(max-width:760px){
  .hero-meta .cell{grid-column:span 6;margin-bottom:14px}
  .hero-strip .g{min-height:0}
  .hero-fields{grid-column:1/-1;height:72px;border-bottom:1px solid var(--ink)}
  .hero-claim{grid-column:1/-1;padding:18px 0}
}

/* ---------- marquee ---------- */
.marquee{
  background:var(--blue);color:var(--paper);
  border-bottom:1px solid var(--ink);
  overflow:hidden;white-space:nowrap;
  padding:12px 0;
}
.marquee .track{
  display:inline-block;
  animation:mq 28s linear infinite;
  font-size:clamp(16px,1.8vw,24px);font-weight:700;letter-spacing:.02em;text-transform:uppercase;
}
.marquee .track .ast{color:var(--red)}
@keyframes mq{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- section scaffolding ---------- */
section{border-bottom:1px solid var(--ink)}
.sec-head{padding-top:clamp(28px,4vw,56px);padding-bottom:clamp(20px,3vw,40px);align-items:end}
.sec-head .num{
  grid-column:1/span 2;font-size:13px;font-weight:700;color:var(--red);letter-spacing:.1em;
}
.sec-head h2{grid-column:3/span 8}
.sec-head .side{
  grid-column:11/span 2;font-size:12px;line-height:1.5;text-align:right;
  letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:var(--blue);
}
@media(max-width:760px){
  .sec-head .num{grid-column:1/-1;margin-bottom:10px}
  .sec-head h2{grid-column:1/-1}
  .sec-head .side{display:none}
}

/* ---------- speakers table ---------- */
.speakers{background:var(--paper)}
.sp-table{border-top:1px solid var(--ink)}
.sp-row{
  display:grid;grid-template-columns:repeat(12,1fr);
  padding-left:var(--pad);padding-right:var(--pad);
  border-bottom:1px solid var(--ink);
  align-items:baseline;
  transition:background var(--t),color var(--t);
  cursor:default;
}
.sp-row>*{padding-top:16px;padding-bottom:16px}
.sp-row .no{grid-column:1/span 1;font-size:13px;font-weight:700;color:var(--red);transition:color var(--t)}
.sp-row .name{grid-column:2/span 4;font-size:clamp(20px,2.6vw,36px);font-weight:800;letter-spacing:-.03em;text-transform:uppercase;line-height:1}
.sp-row .org{grid-column:6/span 3;font-size:13px;letter-spacing:.04em;color:var(--blue);transition:color var(--t);text-transform:uppercase;font-weight:600}
.sp-row .talk{grid-column:9/span 3;font-size:14px;line-height:1.35}
.sp-row .slot{grid-column:12/span 1;font-size:13px;font-weight:700;text-align:right}
.sp-row:hover{background:var(--blue);color:var(--paper)}
.sp-row:hover .no{color:var(--paper)}
.sp-row:hover .org{color:var(--red)}
.sp-row.key:hover{background:var(--ink)}
@media(max-width:760px){
  .sp-row .no{grid-column:1/span 2}
  .sp-row .name{grid-column:3/span 10}
  .sp-row .org{grid-column:3/span 7;padding-top:2px;padding-bottom:14px}
  .sp-row .talk{display:none}
  .sp-row .slot{grid-column:10/span 3;padding-top:2px;padding-bottom:14px}
}

/* ---------- schedule timetable ---------- */
.timetable{
  margin:0 var(--pad);
  border:1px solid var(--ink);border-bottom:none;
  display:grid;grid-template-columns:120px repeat(3,1fr);
  margin-bottom:clamp(28px,4vw,56px);
  background:var(--paper);
}
.tt-cell{
  border-bottom:1px solid var(--ink);border-right:1px solid var(--ink);
  padding:14px 16px;min-height:76px;
  font-size:13px;line-height:1.35;
  transition:background var(--t),color var(--t);
}
.tt-cell:nth-child(4n){border-right:none}
.tt-head{
  background:var(--ink);color:var(--paper);
  font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:12px;
  min-height:0;padding:12px 16px;
  display:flex;justify-content:space-between;align-items:baseline;
}
.tt-head em{font-style:normal;color:var(--red)}
.tt-time{
  font-weight:700;font-size:13px;color:var(--blue);
  display:flex;align-items:flex-start;min-height:0;
}
.tt-cell strong{display:block;font-weight:700;text-transform:uppercase;letter-spacing:.02em;margin-bottom:3px;font-size:13px}
.tt-cell span{color:var(--blue);transition:color var(--t)}
.tt-cell.ev:hover{background:var(--blue);color:var(--paper)}
.tt-cell.ev:hover span{color:var(--paper)}
.tt-cell.hot{background:var(--red);color:var(--paper)}
.tt-cell.hot span{color:var(--paper)}
.tt-cell.hot:hover{background:var(--ink)}
.tt-cell.mute{background:transparent;color:rgba(17,17,17,.4)}
.tt-cell.blue-field{background:var(--blue);color:var(--paper)}
.tt-cell.blue-field span{color:var(--paper);opacity:.7}
.tt-cell.blue-field:hover{background:var(--ink)}
@media(max-width:900px){
  .timetable{grid-template-columns:64px repeat(3,1fr)}
  .tt-cell{padding:10px 8px;font-size:11px}
  .tt-cell strong{font-size:11px}
}

/* ---------- venue ---------- */
.venue-body{padding-bottom:clamp(36px,5vw,72px)}
.venue-big{grid-column:1/span 7}
.venue-big .d2{color:var(--blue)}
.venue-big .d2 em{font-style:normal;color:var(--ink)}
.venue-info{grid-column:9/span 4;display:flex;flex-direction:column;gap:22px;font-size:14px;line-height:1.5}
.venue-info .h-sm{color:var(--red);margin-bottom:4px}
.venue-coords{
  grid-column:1/span 12;margin-top:clamp(28px,4vw,52px);
  border-top:1px solid var(--ink);padding-top:14px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--blue);
}
@media(max-width:760px){
  .venue-big{grid-column:1/-1}
  .venue-info{grid-column:1/-1;margin-top:28px}
}

/* ---------- register red slab ---------- */
.register{background:var(--red);color:var(--paper);border-bottom:1px solid var(--ink)}
.register ::selection{background:var(--ink);color:var(--paper)}
.reg-inner{padding-top:clamp(40px,6vw,88px);padding-bottom:clamp(40px,6vw,88px)}
.reg-inner h2{grid-column:1/span 12}
.reg-inner h2 .ast-big{color:var(--ink)}
.reg-cols{
  grid-column:1/span 12;margin-top:clamp(28px,4vw,56px);
  display:grid;grid-template-columns:repeat(12,1fr);
  border-top:1px solid var(--paper);
}
.tier{
  grid-column:span 4;border-right:1px solid var(--paper);
  padding:20px 20px 24px 0;
  display:flex;flex-direction:column;gap:10px;
}
.tier:last-child{border-right:none}
.tier .h-sm{opacity:.85}
.tier .price{font-size:clamp(34px,4.5vw,64px);font-weight:800;letter-spacing:-.04em;line-height:1}
.tier p{font-size:13px;line-height:1.45;max-width:32ch}
.tier a.btn{
  margin-top:auto;align-self:flex-start;
  border:1px solid var(--paper);padding:10px 22px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;
  transition:background var(--t),color var(--t);
}
.tier a.btn:hover{background:var(--paper);color:var(--red)}
.tier.sold a.btn{opacity:.45;pointer-events:none}
@media(max-width:760px){
  .tier{grid-column:span 12;border-right:none;border-bottom:1px solid var(--paper);padding-right:0}
  .tier:last-child{border-bottom:none;padding-bottom:0}
}

/* ---------- footer ---------- */
footer{background:var(--ink);color:var(--paper)}
footer ::selection{background:var(--red);color:var(--paper)}
.foot-grid{padding-top:clamp(32px,4vw,56px);padding-bottom:clamp(32px,4vw,56px);row-gap:32px}
.foot-brand{grid-column:1/span 4;font-weight:800;font-size:22px;letter-spacing:-.02em;text-transform:uppercase;line-height:1.1}
.foot-brand .ast{color:var(--red)}
.foot-col{grid-column:span 2;font-size:12px;line-height:1.8;letter-spacing:.04em}
.foot-col .h-sm{color:var(--red);margin-bottom:6px;display:block}
.foot-col a{border-bottom:1px solid transparent;transition:border-color var(--t),color var(--t)}
.foot-col a:hover{color:var(--red);border-color:var(--red)}
.foot-legal{
  border-top:1px solid rgba(244,241,234,.25);
  padding-top:16px;padding-bottom:20px;
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  color:rgba(244,241,234,.7);
}
.foot-legal a{color:var(--paper);transition:color var(--t)}
.foot-legal a:hover{color:var(--red)}
@media(max-width:760px){
  .foot-brand{grid-column:1/-1}
  .foot-col{grid-column:span 6}
}

/* ---------- guide page ---------- */
.guide-body .prose{grid-column:3/span 7;padding-bottom:clamp(40px,5vw,72px);font-size:16px;line-height:1.6;max-width:70ch}
.guide-body .prose h3{font-size:clamp(20px,2.4vw,30px);letter-spacing:-.02em;text-transform:uppercase;font-weight:800;margin:2.2em 0 .6em;color:var(--blue)}
.guide-body .prose h3:first-child{margin-top:1.2em}
.guide-body .prose p{margin-bottom:1em}
.guide-body .prose ul{margin:0 0 1em 1.2em}
.guide-body .prose li{margin-bottom:.4em}
.guide-body .prose code{background:rgba(15,31,203,.08);padding:.1em .35em;font-size:.9em;font-family:ui-monospace,Menlo,monospace;color:var(--blue)}
.guide-body .prose pre{
  background:var(--ink);color:var(--paper);padding:20px;overflow-x:auto;
  font-size:13px;line-height:1.5;margin:0 0 1.4em;font-family:ui-monospace,Menlo,monospace;
  border-left:4px solid var(--red);
}
.guide-body .prose pre code{background:none;color:inherit;padding:0}
.shots-strip{grid-column:1/span 12;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--ink);border:1px solid var(--ink);margin:0 0 1.4em}
.shots-strip figure{background:var(--paper);margin:0}
.shots-strip img{width:100%;display:block}
.shots-strip figcaption{font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;padding:8px 10px;color:var(--blue)}
@media(max-width:760px){
  .guide-body .prose{grid-column:1/-1}
  .shots-strip{grid-template-columns:1fr}
}

/* ---------- reduced motion ---------- */
@media(prefers-reduced-motion:reduce){
  .marquee .track{animation:none}
  *{transition-duration:.01ms!important}
  html{scroll-behavior:auto}
}