:root {
  --n4m-ink: #172b3a;
  --n4m-muted: #5e7280;
  --n4m-accent: #2f6f73;
  --n4m-paper: #f7fafb;
  --n4m-line: #d8e2e7;
}

body {
  min-height: 100vh;
  color: var(--n4m-ink);
  background: var(--n4m-paper);
  font-family: Georgia, "Times New Roman", serif;
}

.site-header {
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--n4m-line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand img { display: block; width: 132px; height: auto; }
nav { display: flex; flex-wrap: wrap; gap: .9rem; font-family: Arial, sans-serif; font-size: .9rem; }
nav a { color: var(--n4m-ink); text-decoration: none; }
nav a:hover, nav a.active { color: var(--n4m-accent); }

.page-content { padding-top: 4.5rem; padding-bottom: 4.5rem; }
h1 { max-width: 820px; font-size: clamp(1.6rem, 3vw, 2.5rem); line-height: 1.08; letter-spacing: 0; }
h2 { margin-bottom: .45rem; }
.lead { max-width: 720px; color: var(--n4m-muted); font-size: 1.2rem; }
.eyebrow { color: var(--n4m-accent); font-family: Arial, sans-serif; font-size: .9rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.page-header-copy h1 { margin-top: .25rem; }
.venue-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 460px); gap: 3rem; align-items: start; margin-top: 2rem; }
.venue-media { margin: 0; padding: .6rem; background: white; border: 1px solid var(--n4m-line); }
.venue-media img { display: block; width: 100%; height: auto; }
.venue-media figcaption { padding: .65rem .25rem .1rem; color: var(--n4m-muted); font: .78rem Arial, sans-serif; }
.venue-link { color: var(--n4m-ink); font: 700 .9rem Arial, sans-serif; text-decoration-color: var(--n4m-accent); text-underline-offset: .25rem; }
.venue-link:hover { color: var(--n4m-accent); }
.date-list dl { max-width: 720px; margin: 0; }
.date-list dl > div { display: flex; justify-content: space-between; gap: 2rem; padding: .8rem 0; border-bottom: 1px solid var(--n4m-line); }
.date-list dt { font-weight: 700; }
.date-list dd { margin: 0; color: var(--n4m-muted); text-align: right; }
.registration-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem; }
.registration-grid section { margin-top: 2rem; padding: 1.5rem; border: 1px solid var(--n4m-line); background: white; }
.registration-action { display: inline-block; margin-top: .8rem; color: var(--n4m-ink); font: 700 .9rem Arial, sans-serif; text-decoration: underline; text-decoration-color: var(--n4m-accent); text-underline-offset: .25rem; }
.registration-action:hover { color: var(--n4m-accent); }
.registration-action.is-pending { color: var(--n4m-muted); text-decoration: none; }
.fee-card-header { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .15rem; }
.fee-card-header h4 { font-size: 1.25rem; }
.fee-card-header .fee-subtitle { margin: 0; color: rgba(23, 43, 58, .72); font: 700 .66rem/1.2 Arial, sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.card-header.text-bg-primary .fee-subtitle { color: rgba(23, 43, 58, .78); }
.eyebrow { color: var(--n4m-accent); font-family: Arial, sans-serif; font-size: .9rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.home-theme { max-width: 720px; margin-top: 1rem; color: var(--n4m-muted); font-size: clamp(1.25rem, 2.5vw, 1.8rem); font-weight: 400; line-height: 1.35; }
.home-links { display: flex; flex-wrap: wrap; gap: 1rem 1.4rem; margin-top: 2rem; font: 700 .9rem Arial, sans-serif; }
.home-links a { color: var(--n4m-ink); text-decoration: underline; text-decoration-color: var(--n4m-accent); text-underline-offset: .25rem; }
.home-links a:hover { color: var(--n4m-accent); }
.home-details { margin-top: 4rem; }
.home-details p { max-width: 650px; color: var(--n4m-muted); }
.home-intro-text { margin-bottom: 2rem; }
.home-intro-text p { margin: 0 0 1rem; line-height: 1.8; }
.home-intro-text strong { color: var(--n4m-ink); }
.sponsor-rail { padding-left: 2rem; border-left: 1px solid var(--n4m-line); }
.home-hero { position: relative; }
.home-sponsor-banner {
  margin-bottom: 1rem;
  padding: 0;
}
.home-sponsor-banner .eyebrow {
  margin-bottom: .45rem;
}
.home-sponsor-banner .sponsor-group {
  min-height: 126px;
  border-top-width: 5px;
  box-shadow: 0 12px 24px rgba(13, 38, 52, .08);
}
.page-top-shell {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
  margin-bottom: 1.25rem;
}
.page-header-copy {
  flex: 1 1 auto;
  min-width: 0;
}
.page-divider {
  width: 100%;
  margin: 0 0 2rem;
  border-top: 1px solid var(--n4m-line);
}
.page-gold-banner {
  flex: 0 0 220px;
  width: 220px;
  margin: 0;
  padding-top: .2rem;
}
.page-gold-banner .sponsor-group {
  min-height: 110px;
  border-top-width: 5px;
  box-shadow: 0 12px 24px rgba(13, 38, 52, .08);
  background: linear-gradient(180deg, #fffdf6, #fff);
}
.page-gold-banner .sponsor-group::after {
  content: "";
  display: block;
  width: 100%;
  margin-top: .8rem;
  border-top: 1px solid var(--n4m-line);
}
.sponsor-stack { display: flex; flex-direction: column; gap: .65rem; }
.sponsor-stack .sponsor-group { min-height: 74px; }
.sponsor-stack .sponsor-gold {
  min-height: 112px;
  box-shadow: 0 12px 24px rgba(13, 38, 52, .08);
}
.sponsor-stack .sponsor-silver { min-height: 86px; }
.sponsor-stack .sponsor-bronze { min-height: 72px; }
section, article { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--n4m-line); }
.page-content > article,
.page-content > section {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}
.topic-list li, .speaker-list li, .program-list li { margin: .7rem 0; }
.speaker-list, .program-list { list-style: none; padding: 0; }
.program-list li { padding: .9rem 1rem; border-left: 3px solid var(--n4m-accent); background: #fff; }
.program-overview-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 1.5rem 0 2.5rem; }
.program-day-overview { margin-top: 0; padding: 1.25rem 1.25rem 1rem; border: 1px solid var(--n4m-line); background: #fff; }
.program-day-overview h2 { margin-top: .2rem; margin-bottom: .5rem; font-size: clamp(1.2rem, 2vw, 1.7rem); }
.program-day-overview p { margin: 0; color: var(--n4m-muted); }
.program-day-range { margin-top: .25rem; color: var(--n4m-accent); font: 700 .8rem Arial, sans-serif; letter-spacing: .08em; text-transform: uppercase; }

.overview-intro {
  max-width: 820px;
  margin-bottom: 2rem;
  color: var(--n4m-ink);
}
.overview-intro p {
  margin: 0 0 1rem;
  line-height: 1.8;
  color: var(--n4m-muted);
}
.overview-session-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}
.overview-session-card {
  position: relative;
  padding: 1.25rem 1.25rem 1rem;
  background: linear-gradient(180deg, #ffffff 0%, #f5f9fa 100%);
  border: 1px solid var(--n4m-line);
  box-shadow: 0 10px 20px rgba(13, 38, 52, .04);
  transition: transform .2s ease, box-shadow .2s ease;
}
.overview-session-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 28px rgba(13, 38, 52, .08);
}
.overview-session-header { margin-bottom: .75rem; }
.overview-session-number {
  display: inline-block;
  margin-bottom: .45rem;
  color: var(--n4m-accent);
  font: 700 .72rem Arial, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.overview-session-card h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  line-height: 1.2;
}
.overview-session-question {
  margin: .5rem 0 0.7rem;
  color: var(--n4m-ink);
  font-size: 1.05rem;
}
.overview-session-question strong {
  font-weight: 700;
}
.overview-session-description {
  margin: 0;
  color: var(--n4m-muted);
  line-height: 1.7;
}
.overview-speakers {
  position: relative;
  display: inline-block;
  margin-top: 1rem;
  color: var(--n4m-accent);
  font: 700 .78rem Arial, sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
  cursor: pointer;
}
.overview-speakers-label {
  display: inline-block;
  color: var(--n4m-accent);
  text-decoration: none;
  border-bottom: 1px dotted rgba(47, 111, 115, .7);
}
.overview-speakers-label:hover,
.overview-speakers-label:focus {
  color: var(--n4m-ink);
}
.overview-speakers-list {
  position: absolute;
  left: 0;
  top: calc(100% + .6rem);
  z-index: 2;
  min-width: 240px;
  margin: 0;
  padding: .7rem .9rem;
  list-style: none;
  background: var(--n4m-ink);
  color: #fff;
  border-radius: .45rem;
  box-shadow: 0 12px 24px rgba(13, 38, 52, .16);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .18s ease, visibility .18s ease, transform .18s ease;
}
.overview-speakers-list li {
  margin: .35rem 0;
  font-size: .72rem;
  letter-spacing: .02em;
  text-transform: none;
}
.overview-speakers:hover .overview-speakers-list,
.overview-speakers:focus-within .overview-speakers-list {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.speaker-grid { display: grid; gap: 1.5rem; }
.speaker-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.speaker-card {
  display: flex;
  min-height: 250px;
  overflow: hidden;
  margin-top: 0;
  padding-top: 0;
  border: 1px solid var(--n4m-line);
  border-top: none;
  background: white;
  border-radius: .6rem;
  box-shadow: 0 10px 25px rgba(13, 38, 52, .06);
}
.speaker-card--compact {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}
.speaker-card__body {
  flex: 1 1 auto;
  padding: 0 1.5rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.speaker-tag {
  display: inline-block;
  margin-bottom: .8rem;
  color: var(--n4m-accent);
  font: 700 .72rem Arial, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.speaker-card h3 {
  margin: 0 0 .4rem;
  font-size: clamp(1.4rem, 2vw, 2rem);
  line-height: 1.15;
}
.speaker-meta {
  color: var(--n4m-muted);
  font-size: .96rem;
  line-height: 1.5;
}
.speaker-card p {
  margin: .85rem 0 0;
  color: var(--n4m-muted);
  line-height: 1.55;
}
.speaker-link {
  display: inline-block;
  margin-top: auto;
  color: var(--n4m-ink);
  font: 700 .82rem Arial, sans-serif;
  text-decoration: underline;
  text-decoration-color: var(--n4m-accent);
  text-underline-offset: .25rem;
}
.speaker-link:hover { color: var(--n4m-accent); }
.speaker-link--email {
  margin-top: .5rem;
  font-size: .76rem;
  word-break: break-word;
}
.speaker-card__media {
  flex: 0 0 200px;
  background: linear-gradient(135deg, #dfe8eb, #b9cdd4);
  margin-top: 0;
}
.speaker-card__image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.speaker-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: .08em;
  background: linear-gradient(135deg, var(--n4m-accent), #7ea4aa);
}
.speaker-card--empty { min-height: 120px; }

.sponsor-card {
  display: grid;
  grid-template-columns: minmax(120px, 190px) minmax(0, 1fr);
  gap: 1rem;
  width: 100%;
  padding: 1rem;
  background: white;
  border: 1px solid var(--n4m-line);
  border-top: 4px solid var(--n4m-accent);
  box-shadow: 0 10px 25px rgba(13, 38, 52, .04);
}
.sponsor-card--gold { border-top-color: #b88b35; }
.sponsor-card--silver { border-top-color: #9ba9ae; }
.sponsor-card--bronze { border-top-color: #ae6f4d; }
.sponsor-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .75rem;
  background: linear-gradient(135deg, #eff5f6, #dfe9ec);
  border: 1px solid var(--n4m-line);
}
.sponsor-card__image {
  display: block;
  width: 100%;
  max-height: 120px;
  object-fit: contain;
}
.sponsor-card__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 100px;
  color: var(--n4m-ink);
  font: 700 .8rem Arial, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: rgba(47, 111, 115, .09);
}
.sponsor-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.sponsor-card__body h3 {
  margin: 0 0 .5rem;
  font-size: clamp(1.25rem, 1.8vw, 1.7rem);
}
.sponsor-card__body p {
  margin: 0;
  color: var(--n4m-muted);
  line-height: 1.6;
}
.sponsor-website-link {
  margin-top: .9rem;
}

.sponsor-showcase { margin-top: 2rem; }
.sponsor-showcase .eyebrow { margin-bottom: 1rem; }
.sponsor-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.sponsor-strip { padding: 3rem 0; background: #e9f0f2; border-top: 1px solid var(--n4m-line); }
.sponsor-strip .eyebrow { color: var(--n4m-ink); }
.commercial-heading { margin-top: 2rem; }
.institutional-grid { display: flex; flex-wrap: wrap; gap: .75rem; }
.institutional-group { min-width: 190px; min-height: 70px; padding: .8rem 1rem; display: flex; align-items: center; gap: .8rem; border: 1px solid #c8d6dc; background: rgba(255, 255, 255, .8); font-size: .95rem; }
.institutional-group img { max-width: 130px; max-height: 42px; object-fit: contain; }
.institutional-placeholder { color: var(--n4m-muted); font-style: italic; }
.sponsor-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; }
.sponsor-group {
  min-height: 100px; padding: 1rem; display: flex; flex-direction: column; justify-content: space-between; border-top: 4px solid #aab8be; background: #fff; color: var(--n4m-ink); text-decoration: none; transition: transform .2s ease, box-shadow .2s ease;
}
.sponsor-group:hover { text-decoration: none; color: var(--n4m-ink); transform: translateY(-2px); box-shadow: 0 12px 22px rgba(13, 38, 52, .08); }
.sponsor-group img,
.sponsor-group .sponsor-placeholder {
  display: block;
  width: 100%;
  max-height: 64px;
  object-fit: contain;
  margin: .5rem 0;
}
.sponsor-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  color: var(--n4m-ink);
  font: 700 .72rem Arial, sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
  background: rgba(47, 111, 115, .06);
}
.sponsor-gold {
  grid-column: 1 / -1;
  min-height: 136px;
  border-color: #b88b35;
}
.sponsor-silver { min-height: 118px; border-color: #9ba9ae; }
.sponsor-bronze { min-height: 88px; border-color: #ae6f4d; }
.sponsor-level { color: var(--n4m-muted); font: bold .7rem/1.2 Arial, sans-serif; letter-spacing: .1em; text-transform: uppercase; }
.sponsor-name { font-size: .95rem; }

.site-footer { padding: 1.25rem 0; background: var(--n4m-ink); color: white; }
.footer-inner, .organiser-list { display: flex; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-inner { justify-content: space-between; font: .85rem Arial, sans-serif; }
.organiser { display: flex; align-items: center; min-height: 36px; text-decoration: none; }
.organiser img { max-width: 150px; max-height: 32px; }
.organiser-eth img { max-width: 154px; padding: 0; }
.organiser-cemi { padding: .35rem .6rem; background: white; }

@media (max-width: 900px) {
  .page-top-shell { flex-direction: column; gap: 1rem; }
  .page-gold-banner { flex: 0 0 auto; width: 100%; padding-top: 0; }
  .page-gold-banner .sponsor-group { min-height: 90px; }
  .overview-session-grid, .program-overview-grid, .sponsor-detail-grid { grid-template-columns: 1fr; }
  .speaker-row { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .speaker-card { flex-direction: column-reverse; min-height: 0; }
  .speaker-card__media { flex: 0 0 auto; height: 260px; }
  .speaker-card--empty .speaker-card__media { display: none; }
  .sponsor-card { grid-template-columns: 1fr; }
}

@media (max-width: 700px) { .sponsor-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 460px) {
  .sponsor-grid { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 991px) {
  .sponsor-rail { padding-top: 2rem; padding-left: calc(var(--bs-gutter-x) * .5); border-top: 1px solid var(--n4m-line); border-left: 0; }
  .venue-layout { grid-template-columns: 1fr; }
  .registration-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .date-list dl > div { display: block; }
  .date-list dd { margin-top: .25rem; text-align: left; }
}