:root {
  --primary: #003366;
  --accent: #007acc;
  --background: #f9f9f9;
  --text: #333;
  --white: #fff;
  --off-white: #ccc;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  background: var(--background);
  color: var(--text);

  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
}

td {
  padding: 0 15px;
  vertical-align: top;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  text-align: left;
}

.cancelled {
  text-decoration: line-through;
}

.past {
  text-decoration: line-through;
  color: darkgray;
}

details.talk-summary p {
  font-size: 0.9em;
  margin-bottom: 0.75em;
}

details.talk-summary summary b {
  color: #55b;
}

.talk {
  display: block;
  font-weight: bold;
  font-style: italic;
}

ul,
ol {
  padding-left: 2rem;
  font-size: 1.1rem;
}

header {
  background: var(--primary);
  color: var(--white);
  padding: 1rem 0 2rem;
}

header h1 {
  font-size: 1.8rem;
}

a {
  color: var(--accent);
  font-weight: bold;
}

a:hover {
  color: var(--off-white);
  font-weight: bold;
  text-decoration-thickness: 2px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.7rem;
}

nav a {
  color: var(--white);
  text-decoration: underline;
  font-weight: bold;
  font-size: 1.1rem;
}

nav a:hover {
  color: var(--off-white);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  font-weight: bolder;
  font-size: 1.1rem;
}

.hero {
  color: var(--primary);
  padding: 2rem 0;
}

h2 {
  font-size: 2.1rem;
  font-weight: 600;
}

.hero h2 {
  font-size: 2.5rem;
  font-weight: bolder;
}

h3 {
  font-size: 1.7rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

h4 {
  font-size: 1.3rem;
  padding-top: 1rem;
  padding-bottom: 0.5rem;
}

p {
  max-width: 700px;
  font-size: 1.1rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background: var(--primary);
  color: var(--white);
  margin-top: auto;
}

/* Program schedule */

.schedule-container {
  font-family: inherit;
  line-height: 1.4;
}

.schedule-table {
  width: 100%;
  table-layout: fixed;
  border-collapse: collapse;
  margin-top: 20px;
}

.schedule-table th,
.schedule-table td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: left;
  vertical-align: top;
  word-wrap: break-word !important;
  overflow-wrap: break-word !important;
  white-space: normal !important;
}

.schedule-table th {
  background-color: #f4f4f4;
  color: #333;
  font-weight: bold;
  text-align: center;
}

.schedule-table th:first-child,
.schedule-table .time-col {
  width: 10%;
}

.schedule-table .time-col {
  background-color: #fafafa;
  color: #333;
  font-weight: bold;
  text-align: center;
}

.schedule-container .session-title {
  display: block;
  margin-bottom: 4px;
  font-weight: bold;
}

.schedule-container ul.session-list {
  width: auto !important;
  margin: 0 !important;
  padding: 0 !important;
  list-style-type: none !important;
  font-size: 0.9em;
}

.schedule-container ul.session-list li {
  position: relative;
  margin: 0 0 6px !important;
  padding: 0 !important;
  line-height: 1.3;
}

.schedule-container ul.session-list li::before {
  content: "";
  position: absolute;
  left: -12px;
}

.schedule-container .note {
  margin-top: 15px;
  color: #666;
  font-size: 0.9em;
  font-style: italic;
}

.schedule-container .time-exception {
  display: block;
  margin-top: 4px;
  color: #555;
  font-size: 0.85em;
}

.schedule-table .track {
  --track-color: #374151;
}

.schedule-table .track a,
.schedule-table .track a:visited {
  color: var(--track-color);
  font-weight: 600;
  text-decoration-color: var(--track-color);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.schedule-table .track a:hover {
  color: var(--track-color);
  text-decoration-thickness: 2px;
}

.schedule-table .track-badge {
  display: inline-block;
  min-width: 1.55em;
  margin-right: 0.25em;
  padding: 0.02em 0.22em;
  border: 1px solid var(--track-color);
  border-radius: 0.35em;
  background: #fff;
  color: var(--track-color);
  font-size: 0.9em;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  vertical-align: baseline;
}

.schedule-table .track-1  { --track-color: #1d4ef8; }
.schedule-table .track-2  { --track-color: #7e22ce; }
.schedule-table .track-3  { --track-color: #047857; }
.schedule-table .track-4  { --track-color: #ab00ab; }
.schedule-table .track-5  { --track-color: #0f766e; }
.schedule-table .track-6  { --track-color: #7c2d12; }
.schedule-table .track-7  { --track-color: #4338ca; }
.schedule-table .track-8  { --track-color: #165524; }
.schedule-table .track-9  { --track-color: #a91c2c; }
.schedule-table .track-10 { --track-color: #0369a1; }
.schedule-table .track-11 { --track-color: #858d0e; }
.schedule-table .track-12 { --track-color: #c058d9; }
.schedule-table .track-13 { --track-color: #065f46; }
.schedule-table .track-14 { --track-color: #be123c; }
.schedule-table .track-15 { --track-color: #374151; }

@media (max-width: 600px) {
  header,
  .container {
    padding: 0.8rem;
  }

  h2 {
    font-size: 1.8rem;
  }

  h3 {
    font-size: 1.2rem;
  }

  nav {
    flex-direction: column;
    gap: 0.5rem;
  }
}

.session-table {
  border-collapse: collapse;
}

.session-table td {
  border: 1px solid #000;
}