/* ========================================
   ICBO 2026 Custom Styles
   ======================================== */

/* --- Hero Banner --- */
.hero-banner {
  background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
  color: #ffffff;
  text-align: center;
  padding: 50px 30px 40px;
  margin: -20px -15px 30px -15px;
  border-radius: 0 0 6px 6px;
}

.hero-banner h1 {
  font-size: 3em;
  font-weight: 700;
  margin-bottom: 5px;
  color: #ffffff;
  letter-spacing: 2px;
}

.hero-banner h2 {
  font-size: 1.3em;
  font-weight: 400;
  margin-bottom: 15px;
  color: #ecf0f1;
  border-bottom: none;
}

.hero-banner h3 {
  font-size: 1.5em;
  font-weight: 300;
  font-style: italic;
  margin-bottom: 20px;
  color: #f1c40f;
  border-bottom: none;
}

.hero-banner h3 .fa {
  font-size: 0.8em;
  margin-right: 5px;
}

.hero-banner p {
  font-size: 1.2em;
  margin: 0;
}

.hero-banner strong {
  color: #ffffff;
}

.hero-location {
  display: block;
  margin-top: 10px;
  font-size: 0.95em;
  color: #d6eaf8;
  letter-spacing: 0.3px;
}

.hero-location .fa {
  margin-right: 4px;
}

.hero-link {
  color: #f1c40f !important;
  text-decoration: underline;
}

.hero-link:hover {
  color: #ffffff !important;
}

.hero-banner .headerlink {
  display: none;
}

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

table thead th {
  background-color: #2c3e50;
  color: #ffffff;
  padding: 10px 15px;
  text-align: left;
  font-weight: 600;
}

table tbody tr:nth-child(even) {
  background-color: #f7f9fb;
}

table tbody tr:hover {
  background-color: #eaf2f8;
}

table td, table th {
  padding: 10px 15px;
  border: 1px solid #dee2e6;
}

/* --- Perspective Quote --- */
.perspective-quote {
  border-left: 4px solid #f1c40f;
  background-color: #fefdf3;
  padding: 14px 20px;
  margin: 20px 0;
  font-style: italic;
  color: #555;
  border-radius: 0 4px 4px 0;
}

.perspective-quote .fa {
  color: #f1c40f;
  margin-right: 6px;
}

/* --- Topic Grid (homepage) --- */
.topic-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.topic-grid .topic-card {
  flex: 1 1 calc(50% - 10px);
  min-width: 240px;
  margin-bottom: 0;
}

/* --- Topic Cards (homepage compact tiles) --- */
.topic-card {
  display: block;
  background-color: #f0f5fb;
  border-left: 4px solid #3498db;
  border-radius: 4px;
  padding: 10px 14px;
  margin-bottom: 10px;
  font-size: 0.95em;
  color: #2c3e50 !important;
  text-decoration: none !important;
  transition: background-color 0.15s ease, border-left-color 0.15s ease;
}

.topic-card:hover {
  background-color: #ddeaf7;
  border-left-color: #2980b9;
  text-decoration: none !important;
}

.topic-card strong {
  color: #3498db;
  margin-right: 4px;
}

/* --- Topic Cards (call for submissions expanded) --- */
.topic-card-full {
  background-color: #f8f9fa;
  border-left: 4px solid #3498db;
  border-radius: 4px;
  padding: 15px 20px;
  margin-bottom: 20px;
}

.topic-card-full h3 {
  color: #2c3e50;
  margin-top: 0;
  font-size: 1.2em;
}

.topic-card-full ul {
  margin-bottom: 0;
}

.topic-card-full li {
  margin-bottom: 4px;
}

/* --- Organizer Cards --- */
.organizer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 20px 0;
}

.organizer-card {
  flex: 1 1 calc(50% - 16px);
  min-width: 260px;
  background-color: #ffffff;
  border: 1px solid #dee2e6;
  border-top: 3px solid #3498db;
  border-radius: 4px;
  padding: 16px 20px;
}

.organizer-name {
  font-size: 1.05em;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 6px;
}

.organizer-affil {
  font-size: 0.88em;
  color: #666;
  line-height: 1.5;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 4px;
  margin: 5px;
  transition: background-color 0.2s ease;
}

.btn-primary {
  background-color: #3498db;
  color: #ffffff !important;
  border: 1px solid #2980b9;
}

.btn-primary:hover {
  background-color: #2980b9;
  text-decoration: none;
  color: #ffffff !important;
}

.btn-default {
  background-color: #ffffff;
  color: #2c3e50 !important;
  border: 1px solid #bdc3c7;
}

.btn-default:hover {
  background-color: #ecf0f1;
  text-decoration: none;
  color: #2c3e50 !important;
}

.btn-slack {
  background-color: #3498db;
  color: #ffffff !important;
  border: 1px solid #2980b9;
  white-space: nowrap;
}

.btn-slack:hover {
  background-color: #2980b9;
  text-decoration: none;
  color: #ffffff !important;
}

/* --- Slack Banner --- */
.slack-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #f9f0fa 0%, #f0f5fb 100%);
  border: 1px solid #d7bedd;
  border-left: 4px solid #4a154b;
  border-radius: 6px;
  padding: 16px 20px;
  gap: 20px;
}

.slack-text {
  font-size: 0.95em;
  color: #2c3e50;
  line-height: 1.6;
}

.slack-text .fa-slack {
  color: #4a154b;
  margin-right: 5px;
}

.slack-text span {
  color: #666;
  font-size: 0.92em;
}

.slack-channel {
  color: #4a154b;
  font-size: 1em;
}

@media (max-width: 600px) {
  .slack-banner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* --- Admonition Overrides --- */
.admonition.note {
  border-left-color: #3498db;
}

.admonition.warning {
  border-left-color: #e67e22;
}

.admonition.note .admonition-title {
  background-color: #eaf2f8;
}

.admonition.warning .admonition-title {
  background-color: #fdf2e9;
}

/* --- Submission Category Cards --- */
.submission-card {
  background-color: #f8f9fa;
  border: 1px solid #dee2e6;
  border-top: 3px solid #3498db;
  border-radius: 4px;
  padding: 20px;
  margin-bottom: 20px;
  min-height: 200px;
}

.submission-card h3 {
  font-size: 1.1em;
  color: #2c3e50;
  margin-top: 0;
  padding-bottom: 10px;
  border-bottom: 1px solid #dee2e6;
  margin-bottom: 12px;
}

.submission-card h3 .fa {
  color: #3498db;
  margin-right: 5px;
}

.submission-card p {
  color: #555;
  font-size: 0.95em;
  margin-bottom: 0;
}

/* --- Section headings with icons --- */
h2 .fa {
  color: #3498db;
  margin-right: 8px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .hero-banner {
    padding: 30px 15px 25px;
  }

  .hero-banner h1 {
    font-size: 2em;
  }

  .hero-banner h2 {
    font-size: 1.1em;
  }

  .hero-banner h3 {
    font-size: 1.2em;
  }

  table {
    font-size: 0.9em;
  }

  table td, table th {
    padding: 8px 10px;
  }

  .btn {
    display: block;
    margin: 8px auto;
    text-align: center;
  }
}