:root {
  --heart-blue: #16324f;
  --heart-blue-light: #24496f;
  --heart-accent: #b38b00;
  --heart-border: #d9dee7;
  --heart-bg: #f3f5f8;
}

body {
  background: var(--heart-bg);
  color: #1f2933;
}

main {
  max-width: 1120px;
}

a {
  color: var(--heart-blue-light);
}

a:hover {
  color: var(--heart-blue);
}

.site-header {
  background: #ffffff;
  border-bottom: 4px solid var(--heart-blue);
}

.brand-title {
  color: var(--heart-blue);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-subtitle {
  color: #5d6978;
  font-size: 0.9rem;
}

.navbar-nav .nav-link {
  color: var(--heart-blue);
  border-radius: 0.25rem;
  margin-left: 0.25rem;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover {
  background: var(--heart-blue);
  color: #ffffff;
}

.hero {
  background: linear-gradient(135deg, var(--heart-blue), var(--heart-blue-light));
  color: #ffffff;
  border-radius: 0.5rem;
  box-shadow: 0 0.5rem 1.2rem rgba(22, 50, 79, 0.18);
}

.hero .lead {
  color: #e8edf4;
}

.institutional-card {
  background: #ffffff;
  border: 1px solid var(--heart-border);
  border-radius: 0.5rem;
  box-shadow: 0 0.25rem 0.8rem rgba(22, 50, 79, 0.08);
}

h1, h2, h3, h4, h5 {
  color: var(--heart-blue);
}

.hero h1,
.hero h2,
.hero h3,
.hero h4,
.hero h5 {
  color: #ffffff;
}

.section-title {
  border-bottom: 2px solid var(--heart-border);
  padding-bottom: 0.35rem;
  margin-bottom: 1rem;
}

.flag {
  width: 28px;
  height: 21px;
  object-fit: cover;
  border: 1px solid #ddd;
}

.paper-title {
  max-width: 680px;
}

.conference-past {
  background: #ffffff;
}

.conference-future {
  background: #eef5fb;
  border-left: 5px solid var(--heart-blue-light);
}

.conference-ongoing {
  background: #fff4cc;
  border: 2px solid var(--heart-accent);
}

.badge-abstracts {
  background: #e9f2ec;
  color: #245c36;
  border: 1px solid #c7decf;
}

.badge-no-abstracts {
  background: #f1f3f5;
  color: #667085;
  border: 1px solid #dee2e6;
}

table thead th {
  color: var(--heart-blue);
  background: #eef1f5 !important;
  border-bottom: 2px solid var(--heart-border);
}

footer {
  color: #6c757d;
  border-top: 1px solid var(--heart-border);
}