/* ═══════════════════════════════════════════════════════════════
   RSME–AMS 2027 · Main Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ─── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --crimson:      #8B1515;
  --crimson-dark: #5e0d0d;
  --crimson-mid:  #a81c1c;
  --crimson-light:#fdf3f3;
  --gold:         #c9963a;
  --gold-light:   #f5e6c8;
  --charcoal:     #1e1e1e;
  --mid-gray:     #555;
  --light-gray:   #f4f4f2;
  --white:        #ffffff;
  --nav-h:        64px;
  --transition:   0.3s ease;
  --radius:       10px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--charcoal);
  background: var(--white);
  line-height: 1.7;
}

/* ─── Nav ───────────────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: transparent;
  display: flex; align-items: center;
  padding: 0 clamp(1rem, 5vw, 3rem);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

/* White nav once hero is scrolled past */
nav.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(139,21,21,0.15);
  box-shadow: 0 2px 24px rgba(0,0,0,0.08);
}

.nav-brand {
  font-family: 'EB Garamond', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: rgba(255,255,255,0.92);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition);
}
nav.scrolled .nav-brand { color: var(--crimson); }

.nav-links {
  margin-left: auto;
  display: flex; gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.82);
  text-decoration: none;
  padding: 0.45rem 0.8rem;
  border-radius: 6px;
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover { background: rgba(255,255,255,0.15); color: white; }
nav.scrolled .nav-links a { color: var(--charcoal); }
nav.scrolled .nav-links a:hover { background: var(--crimson-light); color: var(--crimson); }

.nav-links .nav-register {
  border: 1px solid rgba(255,255,255,0.5);
  color: white !important;
  border-radius: 50px;
  padding: 0.4rem 1.1rem;
}
.nav-links .nav-register:hover { background: rgba(255,255,255,0.2) !important; border-color: white; }
nav.scrolled .nav-links .nav-register {
  background: var(--crimson); border-color: var(--crimson); color: white !important;
}
nav.scrolled .nav-links .nav-register:hover { background: var(--crimson-dark) !important; }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: 0.5rem; margin-left: auto;
  flex-direction: column; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: white;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
  transform-origin: center;
}
nav.scrolled .nav-toggle span { background: var(--charcoal); }

/* Animate hamburger → X when open */
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
@media (max-width: 700px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: white;
    flex-direction: column; gap: 0;
    /* slide in/out */
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, box-shadow 0.35s ease;
    box-shadow: none;
    /* override the margin-left: auto from desktop */
    margin-left: 0;
  }
  .nav-links.open {
    max-height: 480px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.13);
  }

  .nav-links li { border-bottom: 1px solid #f0f0f0; }
  .nav-links li:last-child { border-bottom: none; padding: 0.75rem 1.5rem 1rem; }

  .nav-links a {
    display: block;
    padding: 0.9rem 1.5rem;
    font-size: 0.95rem;
    color: var(--charcoal) !important;
    border-radius: 0;
    letter-spacing: 0.06em;
  }
  .nav-links a:hover {
    background: var(--crimson-light) !important;
    color: var(--crimson) !important;
    padding-left: 1.9rem; /* subtle indent on hover */
  }

  /* Register button in mobile menu */
  .nav-links .nav-register {
    display: block;
    background: var(--crimson) !important;
    color: white !important;
    border: none;
    border-radius: 8px;
    text-align: center;
    padding: 0.75rem 1.5rem;
  }
  .nav-links .nav-register:hover {
    background: var(--crimson-dark) !important;
    padding-left: 1.5rem; /* no indent for button */
  }
}

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: white; color: var(--crimson);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.btn-primary:hover { box-shadow: 0 6px 28px rgba(0,0,0,0.3); }

.btn-outline {
  background: transparent; color: white;
  border: 2px solid rgba(255,255,255,0.6);
}
.btn-outline:hover { border-color: white; background: rgba(255,255,255,0.1); }

.btn-crimson {
  background: var(--crimson); color: white;
  box-shadow: 0 4px 16px rgba(139,21,21,0.35);
}
.btn-crimson:hover { background: var(--crimson-dark); box-shadow: 0 6px 24px rgba(139,21,21,0.45); }

.btn-gold {
  background: var(--gold); color: white;
  box-shadow: 0 4px 16px rgba(201,150,58,0.3);
}
.btn-gold:hover { background: #b5832e; }

/* ─── Hero ──────────────────────────────────────────────────────── */
.hero {
  height: 100vh;
  height: 100dvh;
  background: linear-gradient(160deg, var(--crimson-dark) 0%, var(--crimson) 50%, #a82020 100%);
  display: flex; align-items:flex-start; justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: 30px;
}

@media (max-width: 700px) {
  .hero {
    height: auto;
    min-height: 100dvh;
    align-items: flex-start;
  }
}

@media (min-width: 1024px) {
  .hero {
    height: auto;
    min-height: 100dvh;
    align-items: flex-start;
	padding-top: 80px;
  }
}

/* Subtle geometric background pattern */
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(255,255,255,0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 40%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Ccircle cx='40' cy='40' r='38' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='1'/%3E%3Cline x1='40' y1='2' x2='40' y2='78' stroke='rgba(255,255,255,0.03)' stroke-width='1'/%3E%3Cline x1='2' y1='40' x2='78' y2='40' stroke='rgba(255,255,255,0.03)' stroke-width='1'/%3E%3C/svg%3E");
  pointer-events: none;
}

.hero-inner {
  position: relative; z-index: 1;
  max-width: 800px;
  padding: 2rem 2rem 3rem;
}

@media (max-width: 700px) {
  .hero-inner {
    padding-top: calc(var(--nav-h) + 1.5rem);
  }
}

/* Logo sits in a white rounded card so its crimson colours show clearly */
.hero-logo-wrap {
  display: inline-block;
  background: white;
  border-radius: 20px;
  padding: clamp(0.75rem, 2vw, 1.25rem) clamp(1rem, 3vw, 2rem);
  margin-bottom: 2.5rem;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
  max-width: 90%;
}
.hero-logo {
  width: clamp(120px, 40vw, 210px);
  display: block;
}

.hero-eyebrow {
  font-size: clamp(0.7rem, 1.5vw, 0.85rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: 'EB Garamond', serif;
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 500;
  line-height: 1.15;
  color: white;
  margin-bottom: 1.25rem;
}
.hero-title em { font-style: italic; color: var(--gold-light); }

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255,255,255,0.8);
  margin-bottom: 0.6rem;
}

.hero-date {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  color: rgba(255,255,255,0.65);
  margin-bottom: 3rem;
}

.hero-ctas {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
}


/* ─── Sections — shared ─────────────────────────────────────────── */
section { padding: clamp(4rem, 8vw, 6rem) clamp(1.25rem, 5vw, 3rem); }

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--crimson);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: 'EB Garamond', serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 500;
  line-height: 1.2;
  color: var(--charcoal);
  margin-bottom: 1.25rem;
}

.section-lead {
  font-size: 1.05rem;
  color: var(--mid-gray);
  max-width: 640px;
  line-height: 1.75;
}

hr.divider { border: none; border-top: 1px solid #e0e0e0; margin: 0; }

/* ─── About ─────────────────────────────────────────────────────── */
#about { background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}
@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.about-text p + p { margin-top: 1rem; }

.org-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  border-radius: 14px;
  border: 1px solid #e8e8e8;
  background: white;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  transition: transform var(--transition), box-shadow var(--transition);
}
.org-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(139,21,21,0.12);
}
.org-card-logo-wrap {
  width: 72px; height: 72px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: white;
  border-radius: 10px;
  border: 1px solid #ebebeb;
  overflow: hidden;
  padding: 6px;
}
.org-card-logo {
  width: 100%; height: 100%;
  object-fit: contain;
}
.org-card-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.3rem;
}
.org-card-desc {
  font-size: 0.82rem;
  color: var(--mid-gray);
  line-height: 1.55;
}

.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }

.stat-card {
  background: var(--crimson-light);
  border-left: 4px solid var(--crimson);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.stat-num {
  font-family: 'EB Garamond', serif;
  font-size: 2.4rem;
  color: var(--crimson);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.stat-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--mid-gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── Important Dates ───────────────────────────────────────────── */
#dates { background: var(--light-gray); }

.dates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.date-card {
  background: white;
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.date-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.10); }

.date-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--crimson);
}
.date-card.past::before { background: #bbb; }
.date-card.open::before { background: var(--gold); }

.date-badge {
  display: inline-block;
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.2rem 0.6rem; border-radius: 20px;
  margin-bottom: 0.9rem;
}
.badge-open   { background: #fff4e0; color: #a06800; }
.badge-coming { background: var(--crimson-light); color: var(--crimson); }
.badge-tba    { background: #f0f0f0; color: #888; }

.date-event {
  font-size: 1rem; font-weight: 600; color: var(--charcoal);
  margin-bottom: 0.5rem; line-height: 1.35;
}
.date-when { font-family: 'EB Garamond', serif; font-size: 1.25rem; color: var(--crimson); }
.date-card.past .date-when { color: #aaa; }
.date-card.open .date-when { color: var(--gold); }

/* Highlighted conference card */
.date-card--conference {
  background: var(--crimson-light);
}
.date-card--conference::before { background: var(--crimson); }
.date-card--conference .date-badge { background: var(--crimson); color: white; }
.date-card--conference .date-event { color: var(--crimson-dark); }
.date-card--conference .date-when { font-size: 1.4rem; }

/* ─── Participate ───────────────────────────────────────────────── */
#participate { background: white; }

.participate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}
@media (max-width: 640px) {
  .participate-grid { grid-template-columns: 1fr; }
}

.part-card {
  border-radius: 14px;
  padding: 2.5rem;
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
}
.part-card-reg     { background: var(--crimson); color: white; }
.part-card-session { background: var(--charcoal); color: white; }

.part-card-icon { font-size: 2.5rem; margin-bottom: 1.25rem; line-height: 1; }

.part-card h3 {
  font-family: 'EB Garamond', serif;
  font-size: 1.7rem; font-weight: 500;
  margin-bottom: 0.75rem;
}
.part-card p {
  font-size: 0.95rem; opacity: 0.85;
  line-height: 1.7; margin-bottom: 2rem; flex: 1;
}

/* ─── Venue ─────────────────────────────────────────────────────── */
#venue { background: var(--crimson-dark); color: white; }
#venue .section-label { color: var(--gold-light); opacity: 0.8; }
#venue .section-title { color: white; }
#venue .section-lead  { color: rgba(255,255,255,0.7); }

.venue-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 3rem;
}
@media (max-width: 720px) {
  .venue-grid { grid-template-columns: 1fr; }
}

.venue-facts { display: flex; flex-direction: column; gap: 1.25rem; }

.venue-fact { display: flex; align-items: flex-start; gap: 1rem; }
.venue-fact-icon { font-size: 1.4rem; flex-shrink: 0; margin-top: 0.1rem; }
.venue-fact strong {
  display: block; font-size: 0.8rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--gold-light); opacity: 0.7;
  margin-bottom: 0.2rem;
}
.venue-fact p { font-size: 0.95rem; color: rgba(255,255,255,0.85); margin: 0; }

.venue-map-placeholder {
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  aspect-ratio: 4/3;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 0.75rem;
  color: rgba(255,255,255,0.4); font-size: 0.9rem;
}
.venue-map-placeholder span { font-size: 2.5rem; }

/* ─── Invited Speakers ──────────────────────────────────────────── */
#speakers { background: var(--white); }

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 3rem;
}
@media (max-width: 900px) {
  .speakers-grid { grid-template-columns: repeat(2, 1fr); }
}

.speaker-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2.25rem 1.5rem 2rem;
  border-radius: 14px;
  border: 1px solid #ebebeb;
  background: white;
  transition: transform var(--transition), box-shadow var(--transition);
}
.speaker-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.09);
}

/* Circular photo placeholder */
.speaker-photo {
  width: 110px; height: 110px;
  border-radius: 50%;
  background: var(--light-gray);
  border: 3px solid var(--crimson-light);
  margin-bottom: 1.25rem;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.speaker-photo img { width: 100%; height: 100%; object-fit: cover; }
.speaker-photo-placeholder { width: 60%; height: 60%; fill: #ccc; }

.speaker-name {
  font-family: 'EB Garamond', serif;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}
.speaker-institution {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--crimson);
  letter-spacing: 0.04em;
  margin-bottom: 0.75rem;
}
.speaker-topic {
  font-size: 0.85rem;
  color: var(--mid-gray);
  line-height: 1.5;
  font-style: italic;
  margin-bottom: 0.6rem;
}
.speaker-webpage {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--crimson);
  text-decoration: none;
  margin-top: 0.5rem;
}
.speaker-webpage:hover { text-decoration: underline; }

/* ─── Registration fee table ────────────────────────────────────── */
.fee-table-wrap { overflow-x: auto; margin: 2.5rem 0; }

.fee-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.92rem;
}
.fee-table th {
  background: var(--crimson); color: white;
  font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  font-size: 0.75rem; padding: 0.9rem 1.25rem; text-align: center;
}
.fee-table th:first-child { text-align: left; }
.fee-table td {
  padding: 0.85rem 1.25rem; border-bottom: 1px solid #ebebeb;
  text-align: center; color: var(--charcoal);
}
.fee-table td:first-child { text-align: left; font-weight: 500; }
.fee-table tr:last-child td { border-bottom: none; }
.fee-table tr:nth-child(even) td { background: var(--light-gray); }
.fee-table .fee-period {
  font-size: 0.72rem; color: rgba(255,255,255,0.75);
  display: block; font-weight: 400; letter-spacing: 0; text-transform: none;
  margin-top: 0.2rem;
}
.fee-table .price { font-family: 'EB Garamond', serif; font-size: 1.15rem; }

.fee-includes {
  background: var(--crimson-light);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  margin-top: 2rem;
}
.fee-includes p.section-label { margin-bottom: 0.75rem; }
.fee-includes ul {
  list-style: none; display: flex; flex-direction: column; gap: 0.5rem;
}
.fee-includes ul li::before { content: '✓ '; color: var(--crimson); font-weight: 700; }
.fee-includes ul li { font-size: 0.95rem; color: var(--mid-gray); }

/* Mobile: 2-column, compact cards */
@media (max-width: 600px) {
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem;
  }
  .speaker-card {
    padding: 1.25rem 0.75rem 1rem;
    border-radius: 10px;
  }
  .speaker-photo {
    width: 64px; height: 64px;
    margin-bottom: 0.75rem;
    border-width: 2px;
  }
  .speaker-name { font-size: 0.95rem; }
  .speaker-institution { font-size: 0.72rem; margin-bottom: 0.4rem; }
  .speaker-topic { font-size: 0.78rem; }
}

/* ─── Committee Cards ───────────────────────────────────────────── */
.committee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.committee-card {
  background: white;
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  border: 1px solid #ebebeb;
  border-left: 4px solid #ebebeb;
  transition: transform var(--transition), box-shadow var(--transition);
}
.committee-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

.committee-card--chair {
  border-left-color: var(--crimson);
  background: var(--crimson-light);
}

.committee-role {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--crimson);
  margin-bottom: 0.4rem;
}

.committee-name {
  font-family: 'EB Garamond', serif;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.committee-affil {
  font-size: 0.78rem;
  color: var(--mid-gray);
}

/* ─── Organizers ────────────────────────────────────────────────── */
#organizers { background: var(--light-gray); }

.org-logos {
  display: flex; flex-wrap: wrap;
  gap: 2rem; align-items: center;
  margin-top: 3rem;
}
.org-logo-box {
  background: white;
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  min-width: 140px;
}
.org-logo-text {
  font-family: 'EB Garamond', serif;
  font-size: 1.4rem; font-weight: 700;
  color: var(--crimson);
}

.committee-box {
  margin-top: 3rem;
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.committee-box a { color: var(--crimson); }

/* ─── Location ──────────────────────────────────────────────────── */
.venues-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}
@media (max-width: 720px) {
  .venues-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── Parallel Sessions ─────────────────────────────────────────── */
.proposals-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-bottom: 3rem;
}
@media (max-width: 720px) {
  .proposals-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ─── Sponsors ──────────────────────────────────────────────────── */
.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
  align-items: center;
}
@media (max-width: 600px) {
  .sponsors-grid { grid-template-columns: 1fr; }
}

.sponsor-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 2rem;
  border-radius: 14px;
  border: 1px solid #e8e8e8;
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
  transition: transform var(--transition), box-shadow var(--transition);
  min-height: 180px;
}
.sponsor-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.09);
}
.sponsor-card img {
  max-width: 85%;
  max-height: 160px;
  object-fit: contain;
  filter: grayscale(20%);
  transition: filter var(--transition);
}
.sponsor-card:hover img {
  filter: grayscale(0%);
}

/* ─── Footer ────────────────────────────────────────────────────── */
footer {
  background: var(--charcoal);
  color: rgba(255,255,255,0.6);
  padding: 3rem clamp(1.25rem, 5vw, 3rem);
  font-size: 0.85rem;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
}
@media (max-width: 640px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
}

.footer-brand { font-family: 'EB Garamond', serif; font-size: 1.15rem; color: white; margin-bottom: 0.6rem; }

footer h4 {
  font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(255,255,255,0.4); margin-bottom: 0.9rem;
}
footer ul { list-style: none; }
footer ul li + li { margin-top: 0.5rem; }
footer a { color: rgba(255,255,255,0.6); text-decoration: none; }
footer a:hover { color: white; }

.footer-bottom {
  max-width: 1080px; margin: 2.5rem auto 0;
  padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,0.1);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
  font-size: 0.78rem;
}

/* ─── Sub-page nav (always solid white) ────────────────────────── */
/* Adding .nav-solid directly in HTML for sub-pages */
nav.nav-solid,
nav.nav-solid.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(139,21,21,0.15);
  box-shadow: none;
}
nav.nav-solid .nav-brand { color: var(--crimson); }
nav.nav-solid .nav-links a { color: var(--charcoal); }
nav.nav-solid .nav-links a:hover { background: var(--crimson-light); color: var(--crimson); }
nav.nav-solid .nav-links .nav-register {
  background: var(--crimson); border-color: var(--crimson); color: white !important;
}
nav.nav-solid .nav-links .nav-register:hover { background: var(--crimson-dark) !important; }
nav.nav-solid .nav-toggle span { background: var(--charcoal); }

/* ─── Sub-page banner ───────────────────────────────────────────── */
.page-banner {
  background: linear-gradient(160deg, var(--crimson-dark) 0%, var(--crimson) 100%);
  padding: calc(var(--nav-h) + 3rem) clamp(1.25rem, 5vw, 3rem) 3.5rem;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80'%3E%3Ccircle cx='40' cy='40' r='38' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='1'/%3E%3C/svg%3E");
}
.page-banner-inner {
  max-width: 1080px;
  margin: 0 auto;
  position: relative; z-index: 1;
}
.page-banner .section-label { color: rgba(255,255,255,0.6); margin-bottom: 0.5rem; }
.page-banner-title {
  font-family: 'EB Garamond', serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500;
  color: white;
  line-height: 1.15;
}
.page-banner-lead {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: rgba(255,255,255,0.65);
  max-width: 560px;
}

/* ─── Coming-soon placeholder ───────────────────────────────────── */
.coming-soon {
  text-align: center;
  padding: 5rem 2rem;
}
.coming-soon-icon {
  font-size: 3rem;
  margin-bottom: 1.25rem;
}
.coming-soon h2 {
  font-family: 'EB Garamond', serif;
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--charcoal);
  margin-bottom: 0.75rem;
}
.coming-soon p {
  color: var(--mid-gray);
  font-size: 0.95rem;
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── Utilities ─────────────────────────────────────────────────── */
.mt-3 { margin-top: 3rem; }
.text-center { text-align: center; }