/* FOLGA 2026 — Symposium on Supergeometry, Algebraic Geometry and Foliations
   Visual identity follows sites.google.com/view/folgaufmg: Oswald + Open Sans,
   coral red on charcoal and white. */

:root{
  --coral:#F34F4C;
  --coral-dark:#D3413F;
  --coral-soft:#FDECEB;
  --ink:#1F1F1F;
  --ink-2:#3A3A3A;
  --muted:#6B6B6B;
  --line:#E4E4E4;
  --paper:#FFFFFF;
  --paper-2:#F7F7F7;
  --head:'Oswald', 'Arial Narrow', sans-serif;
  --body:'Open Sans', system-ui, sans-serif;
  --wrap:1120px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:72px; }
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--body); font-size:16px; line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:var(--coral-dark); text-decoration-thickness:1px; text-underline-offset:3px; }
a:hover{ color:var(--coral); }
.wrap{ max-width:var(--wrap); margin:0 auto; padding:0 24px; }

/* ---------- Nav ---------- */
.nav{
  position:sticky; top:0; z-index:50;
  background:var(--ink); color:#fff;
  border-bottom:3px solid var(--coral);
}
.nav .wrap{ display:flex; align-items:center; justify-content:space-between; height:60px; gap:16px; }
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--head); font-weight:600; font-size:20px; letter-spacing:.06em;
  color:#fff; text-decoration:none; text-transform:uppercase;
}
.brand img{ width:28px; height:28px; }
.brand span b{ color:var(--coral); font-weight:600; }
.nav-links{ display:flex; gap:4px; list-style:none; margin:0; padding:0; }
.nav-links a{
  display:block; padding:8px 12px; color:#fff; text-decoration:none;
  font-family:var(--head); font-size:15px; letter-spacing:.08em; text-transform:uppercase;
  border-radius:3px;
}
.nav-links a:hover, .nav-links a[aria-current="page"]{ color:var(--coral); }
.nav-toggle{
  display:none; background:none; border:1px solid rgba(255,255,255,.3); color:#fff;
  font-family:var(--head); letter-spacing:.08em; text-transform:uppercase;
  padding:6px 12px; border-radius:3px; cursor:pointer;
}

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  background:var(--ink) url("img/pampulha.jpg") 62% 62%/cover no-repeat;
  color:#fff; padding:112px 0 120px;
}
.hero::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(90deg, rgba(31,31,31,.72) 0%, rgba(31,31,31,.45) 40%, rgba(31,31,31,0) 75%);
}
.hero-credit{
  position:absolute; z-index:1; right:24px; bottom:14px; margin:0;
  display:flex; align-items:center; gap:10px;
  font-size:12px; font-style:italic; color:rgba(255,255,255,.92); text-shadow:0 1px 3px rgba(0,0,0,.9), 0 0 10px rgba(0,0,0,.6);
}
.hero-credit::before{ content:""; width:24px; height:2px; background:var(--coral); flex:none; }
.hero-credit b{ color:var(--coral); font-style:normal; font-weight:600; }
.hero .wrap{ position:relative; z-index:1; text-shadow:0 2px 12px rgba(0,0,0,.55); }
.kicker{
  font-family:var(--head); font-size:15px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--coral); margin:0 0 14px;
}
.hero h1{
  font-family:var(--head); font-weight:600; text-transform:uppercase;
  font-size:clamp(34px, 5.6vw, 64px); line-height:1.05; letter-spacing:.01em;
  margin:0 0 22px; max-width:22ch;
}
.hero .meta{ font-size:18px; margin:0 0 32px; color:#EDEDED; }
.hero .meta strong{ color:#fff; font-weight:600; }
.btns{ display:flex; flex-wrap:wrap; gap:12px; }
.btn{
  display:inline-block; padding:12px 26px; border-radius:3px;
  font-family:var(--head); font-size:16px; letter-spacing:.1em; text-transform:uppercase;
  text-decoration:none; border:2px solid var(--coral);
  background:var(--coral); color:#fff;
}
.btn:hover{ background:var(--coral-dark); border-color:var(--coral-dark); color:#fff; }
.btn.ghost{ background:transparent; border-color:rgba(255,255,255,.55); }
.btn.ghost:hover{ border-color:#fff; background:rgba(255,255,255,.06); }
.btn[aria-disabled="true"]{ opacity:.6; cursor:default; pointer-events:none; }

.page-head{
  background:var(--ink) url("img/pampulha-1200.jpg") 62% 62%/cover no-repeat; color:#fff;
  position:relative; padding:56px 0 48px;
}
.page-head::after{ content:""; position:absolute; inset:0; background:rgba(31,31,31,.82); }
.page-head .wrap{ position:relative; z-index:1; }
.page-head h1{
  font-family:var(--head); font-weight:600; text-transform:uppercase;
  font-size:clamp(32px, 4.6vw, 48px); margin:0; letter-spacing:.02em;
}
.page-head p{ margin:8px 0 0; color:#DDD; }

/* ---------- Sections ---------- */
section{ padding:72px 0; }
section.alt{ background:var(--paper-2); }
h2{
  font-family:var(--head); font-weight:600; text-transform:uppercase;
  font-size:clamp(26px, 3.4vw, 36px); letter-spacing:.03em; margin:0 0 8px;
}
h2::after{
  content:""; display:block; width:56px; height:4px; background:var(--coral); margin-top:12px;
}
h3{ font-family:var(--head); font-weight:500; font-size:20px; letter-spacing:.04em; text-transform:uppercase; margin:0 0 10px; }
.lead{ font-size:18px; color:var(--ink-2); max-width:70ch; }
.section-head{ margin-bottom:32px; }

.topics{ display:grid; grid-template-columns:repeat(3, 1fr); gap:20px; margin-top:36px; }
.topic{
  background:var(--paper); border:1px solid var(--line); border-top:4px solid var(--coral);
  padding:24px; border-radius:3px;
}
.topic p{ margin:0; color:var(--ink-2); font-size:15px; }

.facts{ display:grid; grid-template-columns:repeat(4, 1fr); gap:0; margin-top:40px; border:1px solid var(--line); background:var(--paper); }
.fact{ padding:20px 22px; border-right:1px solid var(--line); }
.fact:last-child{ border-right:0; }
.fact .n{ font-family:var(--head); font-size:34px; color:var(--coral); line-height:1; }
.fact .l{ font-size:13px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin-top:6px; }

/* Round table feature */
.feature{
  display:grid; grid-template-columns:auto 1fr; gap:28px; align-items:start;
  background:var(--ink); color:#fff; padding:36px; border-radius:3px;
  border-left:6px solid var(--coral);
}
.feature .when{
  font-family:var(--head); text-transform:uppercase; letter-spacing:.08em; text-align:center;
  border:2px solid var(--coral); padding:12px 16px; border-radius:3px; min-width:110px;
}
.feature .when .d{ font-size:40px; line-height:1; color:var(--coral); }
.feature .when .m{ font-size:14px; }
.feature .when .t{ font-size:14px; color:#CCC; margin-top:6px; }
.feature h3{ font-size:24px; text-transform:none; letter-spacing:.01em; margin-bottom:8px; }
.feature .tag{ font-family:var(--head); font-size:13px; letter-spacing:.2em; text-transform:uppercase; color:var(--coral); margin:0 0 6px; }
.feature p{ margin:0; color:#E2E2E2; }

/* Speakers */
.speakers{ display:grid; grid-template-columns:repeat(auto-fill, minmax(230px, 1fr)); gap:14px; }
.spk{
  display:flex; gap:14px; align-items:center; padding:14px 16px;
  background:var(--paper); border:1px solid var(--line); border-radius:3px;
  text-decoration:none; color:inherit;
}
a.spk:hover{ border-color:var(--coral); color:inherit; }
.spk .av{
  flex:none; width:44px; height:44px; border-radius:50%;
  background:var(--ink); color:var(--coral);
  display:grid; place-items:center; font-family:var(--head); font-size:16px; letter-spacing:.04em;
}
.spk .nm{ font-weight:600; line-height:1.25; }
.spk .af{ font-size:13px; color:var(--muted); line-height:1.3; }
.status{ font-size:14px; color:var(--muted); margin-top:16px; }

/* Committees */
.committees{ display:grid; grid-template-columns:1fr 1fr; gap:24px; }
.committee{ background:var(--paper); border:1px solid var(--line); padding:28px; border-radius:3px; }
.committee ul{ list-style:none; margin:0; padding:0; }
.committee li{ padding:10px 0; border-bottom:1px solid var(--line); }
.committee li:last-child{ border-bottom:0; }
.committee li span{ display:block; font-size:14px; color:var(--muted); }
.role{ color:var(--coral-dark); font-size:13px; font-weight:600; text-transform:uppercase; letter-spacing:.06em; margin-left:6px; }

/* Venue */
.venue{ display:grid; grid-template-columns:1fr 1fr; gap:32px; align-items:stretch; }
.venue iframe{ width:100%; min-height:320px; height:100%; border:0; border-radius:3px; filter:grayscale(.25); }
.venue dl{ margin:0; }
.venue dt{ font-family:var(--head); text-transform:uppercase; letter-spacing:.1em; font-size:14px; color:var(--coral-dark); margin-top:18px; }
.venue dt:first-child{ margin-top:0; }
.venue dd{ margin:4px 0 0; }

/* Support */
.support{ display:flex; flex-wrap:wrap; gap:16px; }
.sponsor{
  flex:1 1 220px; display:flex; flex-direction:column; justify-content:center; min-height:96px;
  border:1px solid var(--line); padding:18px 22px; border-radius:3px; background:var(--paper);
}
.sponsor b{ font-family:var(--head); font-weight:600; font-size:22px; letter-spacing:.04em; }
.sponsor span{ font-size:13px; color:var(--muted); }

/* ---------- Program ---------- */
.prog-tools{ display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:space-between; margin-bottom:20px; }
.legend{ display:flex; flex-wrap:wrap; gap:14px; font-size:13px; color:var(--muted); }
.legend i{ display:inline-block; width:12px; height:12px; border-radius:2px; vertical-align:-1px; margin-right:6px; border:1px solid rgba(0,0,0,.08); }
.day-tabs{ display:none; gap:6px; flex-wrap:wrap; margin-bottom:16px; }
.day-tabs button{
  font-family:var(--head); text-transform:uppercase; letter-spacing:.08em; font-size:14px;
  border:1px solid var(--line); background:var(--paper); color:var(--ink);
  padding:8px 12px; border-radius:3px; cursor:pointer;
}
.day-tabs button[aria-selected="true"]{ background:var(--ink); color:#fff; border-color:var(--ink); }

.grid-wrap{ overflow-x:auto; border:1px solid var(--line); border-radius:3px; background:var(--paper); }
table.grid{ width:100%; border-collapse:collapse; min-width:860px; table-layout:fixed; }
.grid th, .grid td{ border:1px solid var(--line); padding:10px 10px; vertical-align:middle; text-align:center; font-size:14px; line-height:1.35; }
.grid thead th{
  background:var(--ink); color:#fff; font-family:var(--head); font-weight:500;
  text-transform:uppercase; letter-spacing:.08em; font-size:15px; border-color:#333;
}
.grid thead th small{ display:block; font-family:var(--body); font-size:12px; color:#BBB; letter-spacing:0; text-transform:none; }
.grid th.time-h{ width:110px; }
.grid td.time{ font-family:var(--head); font-size:14px; letter-spacing:.04em; color:var(--ink-2); background:var(--paper-2); white-space:nowrap; }
.grid td a{ color:inherit; text-decoration:none; }
.grid td a:hover .who{ color:var(--coral-dark); text-decoration:underline; }
.grid .who{ display:block; font-weight:600; }
.grid .aff{ display:block; font-size:12px; color:var(--muted); }
.grid .ttl{ display:block; font-size:12px; font-style:italic; color:var(--ink-2); margin-top:3px; }

.t-coffee{ background:var(--coral-soft); color:var(--coral-dark); font-weight:600; }
.t-lunch{ background:var(--paper-2); color:var(--muted); font-weight:600; }
.t-posters{ background:#EEF3F1; }
.t-roundtable{ background:#FFF; box-shadow:inset 0 0 0 2px var(--coral); }
.t-roundtable .who{ color:var(--coral-dark); }
.t-opening, .t-closing, .t-social{ background:#ECECEC; font-weight:600; }
.t-reception{ color:var(--muted); }
.t-free{ background:repeating-linear-gradient(45deg, #F4F4F4 0 8px, #FAFAFA 8px 16px); color:var(--muted); }
.grid td.now{ outline:3px solid var(--coral); outline-offset:-3px; }

/* Day list (mobile) */
.day-list{ display:none; list-style:none; margin:0; padding:0; border:1px solid var(--line); border-radius:3px; background:var(--paper); }
.day-list li{ display:grid; grid-template-columns:96px 1fr; border-bottom:1px solid var(--line); }
.day-list li:last-child{ border-bottom:0; }
.day-list .tm{ font-family:var(--head); font-size:14px; padding:12px; background:var(--paper-2); color:var(--ink-2); }
.day-list .ev{ padding:12px 14px; font-size:15px; }
.day-list .ev .who{ font-weight:600; display:block; }
.day-list .ev .aff{ font-size:13px; color:var(--muted); display:block; }
.day-list .ev .ttl{ font-size:13px; font-style:italic; display:block; margin-top:2px; }
.day-list a{ color:inherit; text-decoration:none; }

/* Talks */
.talks{ display:grid; gap:12px; }
.talk{ background:var(--paper); border:1px solid var(--line); border-left:4px solid var(--coral); padding:18px 22px; border-radius:3px; }
.talk:target{ box-shadow:0 0 0 3px var(--coral-soft); border-color:var(--coral); }
.talk .hd{ display:flex; flex-wrap:wrap; justify-content:space-between; gap:6px 16px; align-items:baseline; }
.talk .who{ font-weight:700; font-size:17px; }
.talk .aff{ color:var(--muted); font-size:14px; }
.talk .slot{ font-family:var(--head); letter-spacing:.06em; font-size:14px; color:var(--coral-dark); text-transform:uppercase; }
.talk .ttl{ margin-top:6px; font-size:16px; }
.talk .ttl.pending{ color:var(--muted); font-style:italic; }
.talk details{ margin-top:8px; }
.talk summary{ cursor:pointer; font-size:14px; color:var(--coral-dark); font-weight:600; }
.talk .abs{ margin-top:8px; color:var(--ink-2); font-size:15px; }

/* ---------- Footer ---------- */
footer{ background:var(--ink); color:#CFCFCF; padding:40px 0; font-size:14px; border-top:3px solid var(--coral); }
footer .wrap{ display:flex; flex-wrap:wrap; justify-content:space-between; gap:16px; }
footer a{ color:#fff; }
footer b{ color:#fff; font-family:var(--head); font-weight:500; letter-spacing:.08em; text-transform:uppercase; }

/* ---------- Responsive ---------- */
@media (max-width: 900px){
  .topics{ grid-template-columns:1fr; }
  .facts{ grid-template-columns:1fr 1fr; }
  .fact:nth-child(2){ border-right:0; }
  .fact:nth-child(-n+2){ border-bottom:1px solid var(--line); }
  .committees, .venue{ grid-template-columns:1fr; }
}
@media (max-width: 760px){
  .wrap{ padding:0 16px; }
  .nav-toggle{ display:block; }
  .nav-links{
    display:none; position:absolute; top:63px; left:0; right:0;
    flex-direction:column; background:var(--ink); padding:8px 16px 16px; border-bottom:3px solid var(--coral);
  }
  .nav-links.open{ display:flex; }
  .hero{ padding:64px 0 72px; background-image:url("img/pampulha-1200.jpg"); }
  .hero::after{ background:linear-gradient(180deg, rgba(31,31,31,.7) 0%, rgba(31,31,31,.5) 60%, rgba(31,31,31,.25) 100%); }
  .hero-credit{ left:16px; right:16px; font-size:11px; }
  section{ padding:52px 0; }
  .feature{ grid-template-columns:1fr; padding:24px; }
  .feature .when{ justify-self:start; }
  .day-tabs{ display:flex; }
  .grid-wrap{ display:none; }
  .day-list{ display:block; }
}

/* Speaker not yet confirmed */
.tbc{
  display:inline-block; margin-top:4px; padding:1px 7px; border-radius:2px;
  border:1px dashed var(--coral); color:var(--coral-dark);
  font-family:var(--head); font-size:11px; letter-spacing:.1em; text-transform:uppercase; font-style:normal;
}

/* ---------- Registration ---------- */
.reg{ max-width:760px; }
.reg-notice{
  background:var(--coral-soft); border-left:4px solid var(--coral); padding:14px 18px;
  border-radius:3px; margin:0 0 24px; color:var(--ink-2);
}
.reg fieldset{
  border:1px solid var(--line); border-top:4px solid var(--coral); border-radius:3px;
  background:var(--paper); padding:26px 28px 8px; margin:0 0 24px;
}
.reg legend{
  font-family:var(--head); font-weight:500; font-size:20px; letter-spacing:.04em; text-transform:uppercase;
  padding:0 8px; margin-left:-8px;
}
.reg .field{ margin-bottom:20px; }
.reg .row{ display:grid; grid-template-columns:1fr 1fr; gap:0 20px; }
.reg label, .reg .lbl{ display:block; font-weight:600; margin-bottom:6px; }
.reg i{ color:var(--coral-dark); font-style:normal; }
.reg input[type=text], .reg input[type=email], .reg textarea{
  width:100%; font:inherit; color:var(--ink); background:var(--paper);
  border:1px solid #CFCFCF; border-radius:3px; padding:10px 12px;
}
.reg textarea{ resize:vertical; }
.reg input:focus, .reg textarea:focus{ outline:none; border-color:var(--coral); box-shadow:0 0 0 3px var(--coral-soft); }
.reg .hint{ font-size:13px; color:var(--muted); margin:4px 0 8px; }
.reg .choices{ display:grid; grid-template-columns:repeat(auto-fill, minmax(210px, 1fr)); gap:8px; }
.reg .choices.inline{ display:flex; flex-wrap:wrap; gap:8px; }
.reg .choices label{
  display:flex; align-items:center; gap:10px; margin:0; font-weight:400; cursor:pointer;
  border:1px solid var(--line); border-radius:3px; padding:9px 12px; background:var(--paper);
}
.reg .choices.inline label{ min-width:110px; }
.reg .choices label:hover{ border-color:var(--coral); }
.reg .choices label:has(input:checked){ border-color:var(--coral); background:var(--coral-soft); }
.reg .choices input{ accent-color:var(--coral); width:16px; height:16px; margin:0; }
.reg .days b{ font-family:var(--head); font-weight:500; letter-spacing:.06em; text-transform:uppercase; }
.reg .poster-fields{ border-left:3px solid var(--coral-soft); padding-left:16px; margin-bottom:20px; }
.reg-actions{ display:flex; align-items:center; gap:18px; }
.reg-actions .btn{ cursor:pointer; }
.reg-actions .btn:disabled{ opacity:.55; cursor:default; }
.reg-done{
  background:var(--ink); color:#fff; padding:32px 36px; border-radius:3px; border-left:6px solid var(--coral);
}
.reg-done h3{ font-size:26px; color:var(--coral); }
.reg-done p{ color:#E2E2E2; margin:0 0 8px; }
.reg-done a{ color:#fff; }
@media (max-width: 760px){
  .reg .row{ grid-template-columns:1fr; }
  .reg fieldset{ padding:20px 16px 4px; }
}

/* Registration fee */
.fees{ margin-bottom:32px; }
.fee-grid{ display:grid; grid-template-columns:1fr 1fr; gap:0; border:1px solid var(--line); background:var(--paper); margin-top:20px; }
.fee{ padding:20px 22px; border-right:1px solid var(--line); }
.fee:last-child{ border-right:0; }
.fee .v{ font-family:var(--head); font-size:34px; color:var(--coral); line-height:1; }
.fee .w{ font-size:13px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin-top:6px; }
.fees .pay{ margin:14px 0 0; color:var(--ink-2); }
@media (max-width: 760px){
  .fee-grid{ grid-template-columns:1fr; }
  .fee{ border-right:0; border-bottom:1px solid var(--line); }
  .fee:last-child{ border-bottom:0; }
}

/* Sponsor logos */
.sponsor .logo{ align-self:flex-start; height:28px; width:auto; max-width:100%; object-fit:contain; margin-bottom:10px; }
.sponsor .logo.tall{ height:36px; }
.org-label{ font-family:var(--head); text-transform:uppercase; letter-spacing:.14em; font-size:14px; color:var(--coral-dark); margin:0 0 12px; }
.support.org{ margin-bottom:32px; }