/* Southwest Cotton Physiology Conference — site styles
   Colors taken from the conference logo */
:root {
  --maroon: #7a1f2b;
  --maroon-dark: #5c1620;
  --purple: #3a2a7d;
  --orange: #e0701a;
  --ink: #2b2b2b;
  --muted: #666;
  --line: #e6e1e1;
  --bg: #ffffff;
  --bg-soft: #faf7f6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
h1, h2, h3, h4 { font-family: "Roboto Slab", Georgia, serif; color: var(--maroon); line-height: 1.25; }
a { color: var(--purple); }
a:hover { color: var(--maroon); }
img { max-width: 100%; height: auto; }

.container { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

/* ---------- Header / nav ---------- */
.site-header {
  background: #fff;
  border-bottom: 4px solid var(--maroon);
  position: sticky; top: 0; z-index: 10;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 56px; width: auto; }
.brand span { font-family: "Roboto Slab", Georgia, serif; font-weight: 700; color: var(--maroon); font-size: 1.05rem; line-height: 1.15; }
.brand small { display: block; color: var(--purple); font-family: "Roboto", sans-serif; font-weight: 500; letter-spacing: .08em; font-size: .7rem; text-transform: uppercase; }

.nav-links { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 6px;
  text-decoration: none; color: var(--ink); font-weight: 500;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--maroon); }
.nav-links a.active { background: var(--maroon); color: #fff; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: 6px;
  padding: 8px 10px; font-size: 1.1rem; cursor: pointer; color: var(--maroon);
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 100%; background: #fff;
    flex-direction: column; padding: 8px 16px 16px; border-bottom: 4px solid var(--maroon); }
  .nav-links.open { display: flex; }
  .brand img { height: 44px; }
}

/* ---------- Hero ---------- */
.hero { background: var(--bg-soft); border-bottom: 1px solid var(--line); padding: 40px 0 36px; text-align: center; }
.hero img.logo { width: 340px; max-width: 80%; }
.hero-facts { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 28px; margin-top: 18px; }
.fact { text-align: left; }
.fact .label { font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--orange); font-weight: 700; }
.fact .value { font-weight: 500; }
.fact .value a { color: var(--ink); }

.page-title { background: var(--maroon); color: #fff; padding: 28px 0; }
.page-title h1 { color: #fff; margin: 0; font-size: 1.9rem; }
.page-title p { margin: 6px 0 0; opacity: .9; }

main { padding: 36px 0 56px; }
.section-title { border-bottom: 2px solid var(--line); padding-bottom: 8px; margin: 40px 0 18px; }
.section-title:first-child { margin-top: 0; }

/* ---------- Agenda ---------- */
.day-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.day-tabs a {
  text-decoration: none; padding: 8px 16px; border: 1px solid var(--maroon); border-radius: 999px;
  color: var(--maroon); font-weight: 500; font-size: .95rem;
}
.day-tabs a:hover { background: var(--maroon); color: #fff; }

.day { margin-bottom: 36px; scroll-margin-top: 90px; }
.day-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.day-head h3 { margin: 0; font-size: 1.35rem; }
.tag { background: var(--purple); color: #fff; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; padding: 3px 10px; border-radius: 999px; }

.agenda { width: 100%; border-collapse: collapse; table-layout: fixed; }
.agenda td { padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.agenda td.time { white-space: nowrap; font-weight: 500; color: var(--maroon); width: 170px; }
.agenda td.who { color: var(--muted); width: 34%; }
.agenda tr.break td { background: var(--bg-soft); color: var(--muted); font-style: italic; }
.agenda tr.sp-row td { color: var(--muted); }
.agenda tr.sp-row td.title { color: var(--orange); font-weight: 500; }
.agenda tr.meal td { background: #fff4ea; }
@media (max-width: 640px) {
  .agenda, .agenda tbody, .agenda tr, .agenda td { display: block; width: 100% !important; }
  .agenda tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
  .agenda td { border: 0; padding: 2px 8px; }
}

/* ---------- Sponsors ---------- */
.sponsors { background: var(--bg-soft); border-top: 1px solid var(--line); padding: 36px 0; text-align: center; }
.sponsors h2 { margin-top: 0; }
.sponsor-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-top: 18px; }
.sponsor {
  background: #fff; border: 1px solid var(--line); border-radius: 10px; min-height: 110px;
  display: flex; align-items: center; justify-content: center; padding: 16px;
  font-weight: 700; color: var(--ink); text-decoration: none;
}
.sponsor img { max-height: 70px; width: auto; }
.sponsor.placeholder { color: #aaa; font-weight: 400; border-style: dashed; }
.sponsor-note { color: var(--muted); font-size: .9rem; margin-top: 16px; }

/* ---------- Presentations & posters ---------- */
.intro { color: var(--muted); max-width: 760px; }
.filter { margin: 12px 0 24px; }
.filter input {
  width: 100%; max-width: 420px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 8px; font: inherit;
}
.item {
  border: 1px solid var(--line); border-left: 4px solid var(--maroon); border-radius: 8px;
  margin-bottom: 12px; background: #fff;
}
.item.poster { border-left-color: var(--orange); }
.item summary { list-style: none; cursor: pointer; padding: 14px 16px; display: flex; gap: 12px; align-items: flex-start; }
.item summary::-webkit-details-marker { display: none; }
.item summary::after { content: "+"; margin-left: auto; font-size: 1.3rem; line-height: 1; color: var(--maroon); }
.item[open] summary::after { content: "–"; }
.item .meta { font-size: .85rem; color: var(--muted); }
.item .t { font-weight: 700; color: var(--ink); }
.item .body { padding: 0 16px 16px; border-top: 1px solid var(--line); }
.item .body h4 { margin: 14px 0 6px; font-size: .95rem; color: var(--purple); }
.item .body p { margin: 0 0 8px; text-align: justify; }
.item .pending { color: #999; font-style: italic; }
.num { background: var(--orange); color: #fff; border-radius: 6px; padding: 2px 8px; font-weight: 700; font-size: .85rem; white-space: nowrap; }
.btn {
  display: inline-block; background: var(--maroon); color: #fff; text-decoration: none;
  padding: 10px 18px; border-radius: 8px; font-weight: 500;
}
.btn:hover { background: var(--maroon-dark); color: #fff; }
.btn.small { padding: 6px 12px; font-size: .88rem; }

/* ---------- Contact ---------- */
.contact-card {
  max-width: 640px; margin: 0 auto; text-align: center; border: 1px solid var(--line);
  border-top: 5px solid var(--maroon); border-radius: 10px; padding: 32px 20px;
}
.contact-card .email { font-size: 1.4rem; font-weight: 700; display: inline-block; margin: 10px 0 18px; word-break: break-all; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 32px; }
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }
.box { background: var(--bg-soft); border-radius: 10px; padding: 18px 20px; }
.box h3 { margin-top: 0; font-size: 1.1rem; }

/* ---------- Footer ---------- */
.site-footer { background: var(--maroon); color: #fff; padding: 22px 0; text-align: center; font-size: .92rem; }
.site-footer a { color: #fff; }
.site-footer .bar { height: 5px; background: linear-gradient(90deg, var(--purple) 0 33%, var(--orange) 33% 66%, var(--maroon-dark) 66%); margin-bottom: 18px; }

/* ---------- Home (flyer) ---------- */
.home { padding: 36px 0 48px; background: var(--bg-soft); }
.home-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 36px; align-items: start; }
.flyer { margin: 0; }
.flyer img { display: block; width: 100%; border-radius: 6px; box-shadow: 0 10px 30px rgba(60, 20, 30, .18); background: #fff; }
.flyer figcaption { text-align: center; margin-top: 10px; font-size: .9rem; }
.home-info { position: sticky; top: 100px; }
.home-info h1 { margin: 4px 0 6px; font-size: 2.1rem; }
.home-info .place { margin: 0 0 20px; font-weight: 500; }
.home-info .place a { color: var(--ink); }
.eyebrow { margin: 0; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--orange); font-weight: 700; }
.btn-lg { padding: 13px 26px; font-size: 1.05rem; }
.btn-ghost { background: transparent; color: var(--maroon); border: 1px solid var(--maroon); }
.btn-ghost:hover { background: var(--maroon); color: #fff; }
.topics { margin-top: 28px; background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--purple); border-radius: 10px; padding: 16px 20px; }
.topics h2 { margin: 0 0 8px; font-size: 1.1rem; color: var(--purple); }
.topics ul { margin: 0; padding-left: 20px; }
.topics li { margin: 3px 0; }
.home-links { margin-top: 18px; color: var(--muted); }
@media (max-width: 820px) {
  .home-grid { grid-template-columns: 1fr; }
  .home-info { position: static; text-align: center; }
  .topics { text-align: left; }
}

/* ---------- Agenda archive ---------- */
.year-current { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between;
  border: 1px solid var(--line); border-left: 5px solid var(--orange); border-radius: 10px; padding: 22px 24px; background: #fff; }
.year-current > div:first-child { flex: 1 1 420px; }
.year-current h2 { margin: 4px 0 8px; }
.year-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.year-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.year-card { border: 1px solid var(--line); border-top: 4px solid var(--maroon); border-radius: 10px; padding: 18px 20px; background: var(--bg-soft); }
.year-card .year { font-family: "Roboto Slab", Georgia, serif; font-size: 2rem; font-weight: 700; color: var(--maroon); line-height: 1; }
.year-card p { color: var(--muted); margin: 8px 0 14px; }
.archive-bar { background: var(--purple); color: #fff; font-size: .9rem; }
.archive-bar .container { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; padding-top: 8px; padding-bottom: 8px; }
.archive-bar a { color: #fff; }
.archive-bar span { opacity: .85; }
@media (max-width: 900px) { .nav-links a { padding: 8px 10px; } }

/* ---------- Empty state (presentations / posters) ---------- */
.empty-state { text-align: center; border: 2px dashed var(--line); border-radius: 12px; padding: 40px 20px; margin: 20px 0 8px; background: var(--bg-soft); }
.empty-state h2 { margin: 0 0 8px; }
.empty-state p { margin: 0; color: var(--muted); }