/* ============================================
   ECS8060 AI Engineering - QUB Brand Style
   Brand Color: #8F0E20
   ============================================ */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #222;
  background: #fff;
}

/* ============================================
   NAVIGATION RIBBON
   ============================================ */
.ribbon {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #8F0E20;
  height: 50px;
  display: flex;
  align-items: center;
  padding: 0 15px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.ribbon-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ribbon-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.ribbon-logo {
  height: 36px;
}

.ribbon-title {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}

.ribbon-brand:hover {
  text-decoration: none;
}

.ribbon-brand:hover .ribbon-title {
  color: #ffd;
}

.ribbon-nav {
  display: flex;
  gap: 3px;
}

.ribbon-nav a {
  color: #fff;
  text-decoration: none;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  transition: background 0.2s;
}

.ribbon-nav a:hover {
  background: rgba(255,255,255,0.15);
  text-decoration: none;
}

.ribbon-nav a.active {
  background: rgba(0,0,0,0.2);
}

/* ============================================
   HERO BANNER
   ============================================ */
.hero-banner {
  max-width: 1100px;
  margin: 16px auto 10px;
  padding: 0 15px;
  position: relative;
}

.hero-banner > img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  object-position: center 30%;
  display: block;
  border-radius: 6px;
}

.hero-overlay {
  position: absolute;
  inset: 0 15px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 35px;
  background: linear-gradient(to right, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.05) 60%, rgba(0,0,0,0.1) 100%);
}

.hero-spacer {
  width: 80px;
  flex-shrink: 0;
}

.hero-text {
  flex: 1;
  text-align: center;
  color: #fff;
  text-shadow: 0 1px 6px rgba(0,0,0,0.7);
}

.hero-course-code {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  opacity: 0.9;
  margin-bottom: 8px;
}

.hero-course-name {
  font-size: 50px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 10px;
}

.hero-subtitle {
  font-size: 22px;
  opacity: 0.85;
}

.hero-logo-wrap {
  width: 80px;
  flex-shrink: 0;
  display: flex;
  justify-content: center;
}

.hero-logo {
  opacity: 0.95;
}


/* ============================================
   MAIN CONTENT
   ============================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 15px;
}

/* ============================================
   PAGE HEADER (Title + Subtitle + Logos)
   ============================================ */
.page-header {
  padding: 35px 0 25px;
  margin-bottom: 20px;
}

.page-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-header-text {
  text-align: center;
  flex: 1;
}

.header-logo {
  height: 70px;
  flex-shrink: 0;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: #111;
  margin-bottom: 4px;
}

.page-header .subtitle {
  font-size: 15px;
  color: #666;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: 15px 15px;
  margin-bottom: 8px;
  border-radius: 6px;
}

.section:nth-child(odd) {
  background: #f8f8f8;
}

.section-title {
  font-size: 21px;
  font-weight: 600;
  color: #8F0E20;
  margin-bottom: 12px;
}

.section p {
  margin-bottom: 10px;
  line-height: 1.5;
text-align: justify;
  hyphens: auto;
  word-break: break-word;
}
.section p br {
  content: "";
  display: block;
  margin: 1.2em 0;
  /* Adjust this value as needed */
}

/* ============================================
   TEAM SECTION
   ============================================ */
.team-row {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.team-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 20px;
}

.team-group-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #999;
  margin-bottom: 16px;
  text-align: center;
}

.team-group-divider {
  width: 1px;
  background: #e0e0e0;
  align-self: stretch;
  margin: 4px 0;
}

.team-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px 40px;
}

.team-member {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 120px;
}

.team-member img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #ddd;
  margin-top: 8px;
}

.team-member .info {
  font-size: 15px;
}

.team-member .name {
  font-weight: 600;
  font-size: 16px;
  color: #222;
}

.team-member .name a {
  color: #222;
  text-decoration: none;
}

.team-member .name a:hover {
  color: #8F0E20;
  text-decoration: underline;
}

.team-member .role {
  color: #666;
  font-size: 14px;
}

/* ============================================
   SPONSORS
   ============================================ */
.sponsors-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 35px;
  padding: 15px 0;
}

.sponsor-logo {
  height: 45px;
}

/* ============================================
   TABLES
   ============================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 15px 0;
  font-size: 15px;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
  vertical-align: top;
}

th {
  background: #f8f8f8;
  font-weight: 600;
  color: #333;
}

tr:hover {
  background: #fafafa;
}

/* ============================================
   SCHEDULE TABLE
   ============================================ */
.schedule-table {
  border-collapse: collapse;
  font-size: 16px;
  width: 100%;
}

.schedule-table th,
.schedule-table td {
  padding: 14px 18px;
}

.schedule-table th {
  font-size: 15px;
}

.schedule-table td:first-child {
  width: 100px;
  font-weight: 500;
  font-size: 15px;
  color: #555;
}

.schedule-table td:nth-child(2) {
  width: 55%;
}

.schedule-table td:nth-child(3) {
  width: auto;
}

.schedule-table .topic-cell {
  font-size: 16px;
}

.schedule-table .lecture a {
  color: #222;
  font-weight: 500;
  font-size: 16px;
}

.schedule-table .lecture a:hover {
  color: #8F0E20;
  text-decoration: underline;
}

.schedule-table .materials {
  margin-top: 6px;
  font-size: 14px;
}

.schedule-table .materials a {
  display: inline-block;
  margin-right: 12px;
  color: #0066cc;
}

.schedule-table .materials a:hover {
  text-decoration: underline;
}

.schedule-table .deadline {
  color: #8F0E20;
  font-weight: 600;
  font-size: 16px;
}

.schedule-table .event {
  color: #0066cc;
  font-weight: 500;
  font-size: 16px;
}

.schedule-table .readings {
  font-size: 15px;
  color: #444;
  line-height: 1.6;
}

.schedule-table .readings a {
  color: #0066cc;
}

.schedule-table .readings a:hover {
  text-decoration: underline;
}

/* Section header row */
.schedule-section-row td {
  font-weight: 600;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 12px 18px;
  border-bottom: none;
  text-align: center;
}

.schedule-section-row td { background: #f0f0f0; color: #333; }

/* Mobile-only collapsible readings (hidden on desktop) */
.mobile-readings {
  display: none;
}

/* ============================================
   ASSIGNMENT LIST
   ============================================ */
.assignment-list {
  list-style: none;
  padding: 0;
}

.assignment-list li {
  padding: 10px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.assignment-list .title a {
  color: #222;
  text-decoration: none;
  font-weight: 500;
}

.assignment-list .title a:hover {
  color: #8F0E20;
  text-decoration: underline;
}

.assignment-list .meta {
  font-size: 13px;
  color: #666;
}

/* ============================================
   NOTES & ASSIGNMENT PAGES
   ============================================ */
.page-content {
  padding: 35px 0;
}

.page-content h1 {
  font-size: 26px;
  margin-bottom: 8px;
}

.page-content .page-meta {
  color: #666;
  font-size: 14px;
  margin-bottom: 25px;
  padding-bottom: 18px;
  border-bottom: 1px solid #eee;
}

.page-content h2 {
  font-size: 19px;
  color: #8F0E20;
  margin: 30px 0 12px;
}

.page-content h3 {
  font-size: 16px;
  margin: 22px 0 10px;
}

.page-content p {
  margin-bottom: 12px;
}

.page-content ul, .page-content ol {
  margin: 12px 0 18px 22px;
}

.page-content li {
  margin-bottom: 6px;
}

.page-content code {
  background: #f5f5f5;
  padding: 2px 5px;
  border-radius: 3px;
  font-size: 13px;
}

.page-content pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: 18px;
  border-radius: 5px;
  overflow-x: auto;
  margin: 18px 0;
}

.page-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* Back link */
.back-link {
  display: inline-block;
  margin-bottom: 18px;
  color: #666;
  font-size: 13px;
}

.back-link:hover {
  color: #8F0E20;
  text-decoration: underline;
}

/* ============================================
   MARKDOWN CONTENT (Notes & Assignments)
   ============================================ */
.markdown-content {
  line-height: 1.6;
}

.markdown-content h2 {
  font-size: 20px;
  color: #222;
  margin: 28px 0 12px;
  border-bottom: 1px solid #eee;
  padding-bottom: 6px;
}

.markdown-content h3 {
  font-size: 17px;
  color: #333;
  margin: 22px 0 10px;
}

.markdown-content h4 {
  font-size: 15px;
  color: #444;
  margin: 18px 0 8px;
}

.markdown-content p {
  margin-bottom: 14px;
}

.markdown-content ul,
.markdown-content ol {
  margin: 12px 0 16px 24px;
}

.markdown-content li {
  margin-bottom: 6px;
}

.markdown-content blockquote {
  border-left: 3px solid #8F0E20;
  margin: 16px 0;
  padding: 10px 16px;
  background: #fafafa;
  color: #555;
}

.markdown-content img {
  max-width: 100%;
  height: auto;
  margin: 16px 0;
}

.markdown-content table {
  margin: 16px 0;
}

.markdown-content hr {
  border: none;
  border-top: 1px solid #ddd;
  margin: 24px 0;
}

/* ============================================
   LINKS
   ============================================ */
a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ============================================
   LISTS (general)
   ============================================ */
ul, ol {
  margin: 8px 0 15px 22px;
}

li {
  margin-bottom: 5px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: #f5f5f5;
  border-top: 1px solid #e0e0e0;
  padding: 20px;
  text-align: center;
  color: #666;
  font-size: 13px;
  margin-top: 50px;
}

/* ============================================
   HAMBURGER (hidden on desktop)
   ============================================ */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  position: relative;
  padding: 0;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
  position: absolute;
  left: 9px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger span:nth-child(1) { top: 10px; }
.hamburger span:nth-child(2) { top: 18px; }
.hamburger span:nth-child(3) { top: 26px; }

.hamburger.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .ribbon {
    height: auto;
    padding: 8px 12px;
  }

  .ribbon-inner {
    flex-wrap: wrap;
    flex-direction: row;
  }

  .ribbon-brand {
    flex: 1;
    min-width: 0;
  }

  .hamburger {
    display: block;
  }

  .ribbon-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }

  .ribbon-nav.is-open {
    display: flex;
  }

  .ribbon-nav a {
    border-top: 1px solid rgba(255,255,255,0.15);
  }

  .ribbon-nav a {
    padding: 6px 8px;
    font-size: 12px;
  }

  .page-header h1 {
    font-size: 18px;
  }

  .page-header .subtitle {
    font-size: 13px;
  }

  .header-logo {
    height: 45px;
  }

  /* Hero on mobile */
  .hero-overlay {
    justify-content: center;
    padding: 0 10px;
  }

  .hero-spacer, .hero-logo-wrap {
    display: none;
  }

  .hero-text {
    text-align: center;
  }

  .hero-course-code {
    font-size: 20px;
    margin-bottom: 4px;
  }

  .hero-course-name {
    font-size: 36px;
    margin-bottom: 6px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .team-row {
    display: block;
    text-align: center;
  }

  .team-group-divider {
    display: none;
  }

  .team-group {
    display: block;
    text-align: center;
    padding: 0;
    margin-bottom: 24px;
  }

  .team-grid {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px 25px;
  }

  .team-member {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: auto;
    width: 110px;
  }

  /* .team-member img {
    width: 95px;
    height: 95px;
  } */

  .team-member .name {
    font-size: 15px;
  }

  .team-member .role {
    font-size: 13px;
  }

  .container {
    padding: 0 10px;
  }

  table {
    font-size: 13px;
  }

  th, td {
    padding: 8px;
  }

  /* Schedule table mobile */
  .schedule-table {
    font-size: 13px;
  }

  .schedule-table td:first-child {
    width: 55px;
    white-space: nowrap;
    font-size: 12px;
    padding: 8px 4px;
  }

  .schedule-table td:nth-child(2) {
    width: auto;
  }

  .schedule-table td:nth-child(3) {
    display: none;
  }

  .schedule-table th:nth-child(3) {
    display: none;
  }

  .schedule-table th,
  .schedule-table td {
    padding: 8px 6px;
  }

  .schedule-table .topic-cell {
    font-size: 13px;
  }

  .schedule-table .lecture a {
    font-size: 13px;
  }

  .schedule-table .deadline,
  .schedule-table .event {
    font-size: 13px;
  }

  .schedule-section-row td {
    font-size: 12px;
    padding: 8px 6px;
  }

  /* Collapsible readings on mobile */
  .mobile-readings {
    display: block;
    margin-top: 6px;
  }

  .mobile-readings summary {
    font-size: 12px;
    color: #0066cc;
    cursor: pointer;
    font-weight: 500;
  }

  .mobile-readings summary:hover {
    text-decoration: underline;
  }

  .mobile-readings a {
    display: block;
    font-size: 12px;
    color: #0066cc;
    margin-top: 4px;
    line-height: 1.4;
  }
}