/* =========================================
   EVENT LAYOUT & HEADER
========================================= */
.event-brand-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--color-grey-lighter);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.event-brand-header a {
  text-decoration: none;
  font-family: var(--font-sans);
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.2rem;
  transition: color 0.3s ease;
}

.event-brand-header a:hover {
  color: var(--color-primary);
}

.event-header {
  padding: 140px 20px 20px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.event-header h1 {
  font-family: var(--font-sans);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  color: var(--color-primary);
  margin: 0 0 1rem;
  line-height: 1.1;
  text-transform: uppercase;
}

.event-header p {
  margin: 0;
  color: var(--color-text);
  font-size: 1.4rem;
}

.event-logo-wrapper {
  text-align: center;
  margin: 10px auto 30px auto;
  max-width: 800px;
  padding: 0 20px;
}

.event-logo-wrapper img {
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: 8px;
}

.event-intro-section {
  max-width: 800px;
  margin: 20px auto 40px auto;
  padding: 0 20px;
  font-size: 1.2rem;
  line-height: 1.6;
}

.event-intro-section p {
  margin-bottom: 1rem;
}

.event-intro-list {
  margin-bottom: 1.5rem;
  padding-left: 20px;
}

.event-intro-list li {
  margin-bottom: 0.5rem;
}

/* =========================================
   EVENT CTA BUTTONS
========================================= */
.event-cta {
  display: inline-block;
  background: var(--color-phrase);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  border-radius: 30px;
  padding: 14px 28px;
  transition: transform 0.3s ease, background-color 0.3s ease;
  border: none;
  cursor: pointer;
}

#cta-top-container {
  text-align: center;
  margin-bottom: 4em;
}

.event-cta-top {
  margin-top: 25px;
}

.event-cta:hover:not(.disabled) {
  transform: translateY(-3px);
  background-color: var(--color-primary);
}

.event-cta.disabled {
  background: var(--color-grey-light);
  cursor: not-allowed;
  opacity: 0.7;
}

.event-footer-cta {
  text-align: center;
  padding: 20px 20px 80px;
}

/* =========================================
   EVENT FUNDERS CONTAINER
========================================= */
.event-funders {
  max-width: 900px;
  margin: 60px auto 0px auto;
  padding: 40px 20px 0;
  text-align: center;
  border-top: 1px solid var(--color-grey-lighter);
}

.funders-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 30px;
}

.funders-logos a {
  display: inline-block;
}

.funders-logos img {
  height: 45px;
  width: auto;
  object-fit: contain;
  display: block;
  filter: grayscale(100%);
  transition: transform 0.3s ease, filter 0.3s ease;
  will-change: transform, filter;
}

.funders-logos a:hover img {
  filter: grayscale(0%);
  transform: scale(1.05);
}

/* =========================================
   DAY NAVIGATION (Editorial Design)
========================================= */
.program-main-header {
  text-align: center;
  margin-top: 60px;
  margin-bottom: 20px;
  font-family: var(--font-main);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-text);
}

.day-tabs-wrapper {
  display: flex;
  justify-content: center;
  width: 100%;
}

#day-tabs-container {
  display: flex;
  width: max-content;
  max-width: 100%;
  margin: 0 auto 50px auto;
  justify-content: center;
  gap: 40px;
  padding: 0 30px 20px 30px;
  position: relative; 
}

#day-tabs-container::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--color-grey-lighter);
  z-index: 1;
}

.day-tab {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 10px;
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--color-grey-light);
  transition: all 0.3s ease;
  min-width: 60px;
}

.day-tab-weekday {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  transition: color 0.3s ease;
}

.day-tab-number {
  font-size: 2.5rem;
  font-family: var(--font-main);
  font-weight: 400;
  line-height: 1;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  transform-origin: bottom center;
}

.day-tab:hover {
  color: var(--color-grey);
}

.day-tab.active {
  color: var(--color-primary);
}

.day-tab.active .day-tab-weekday {
  font-weight: 700;
}

.day-tab.active .day-tab-number {
  font-weight: 600;
  transform: scale(1.15);
}

.day-tab::after {
  content: "";
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 3;
}

.day-tab.active::after {
  transform: translateX(-50%) scale(1);
}

/* =========================================
   TIMELINE & SCHEDULE STRUCTURE
========================================= */
.event-programme {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

.day-container {
  display: none;
}

.day-container.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}

.day-header {
  margin: 40px 0 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
  font-family: var(--font-sans);
  color: var(--color-primary);
  font-size: 1.6rem;
  font-weight: 700;
}

.row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 0 20px;
  position: relative;
}

.time {
  text-align: right;
  padding-top: 24px;
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.1rem;
}

.time small {
  display: block;
  font-weight: 400;
  color: var(--color-grey-light);
  font-size: 0.9rem;
}

.slot {
  position: relative;
  padding: 12px 0 12px 30px;
  border-left: 2px dashed var(--color-grey-lighter);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.slot::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 30px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-grey-lighter);
}

.row.has-talk .slot::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

/* =========================================
   SESSION HEADERS & META
========================================= */
.session-header {
  display: flex;
  align-items: center;
  margin: 40px 0 20px 0;
  color: var(--color-grey-light);
  font-size: 1.00rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  gap: 15px;
}

.session-header::before,
.session-header::after {
  content: "";
  flex: 1;
  height: 1px;
  background-color: var(--color-grey-lighter);
}

.session-header-label {
  color: var(--color-primary);
  margin-right: 4px;
}

.session-title {
  font-family: var(--font-sans);
  font-size: 1.2rem;
  color: var(--color-primary);
  font-weight: 700;
  margin: 0;
}

.session-desc {
  font-size: 0.95rem;
  color: var(--color-grey-light);
  margin: 5px 0 0;
}

.session-chair {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-grey-light);
  margin-top: -10px;
  margin-bottom: 20px;
  text-align: left;
}

.session-header + .session-chair {
  text-align: center;
  margin-top: -15px; 
}

/* =========================================
   PARALLEL SESSIONS (2 Columns)
========================================= */
.parallel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  width: 100%;
}

.parallel-grid .session-column:first-child {
  padding-right: 30px;
}

.parallel-grid .session-column:last-child {
  padding-left: 30px;
  border-left: 1px dashed var(--color-grey-lighter);
}

.column-header {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-grey-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0;
  margin-bottom: 20px;
  display: block;
  align-items: center;
  gap: 8px;
}

.column-header-type {
  color: var(--color-primary);
  display: inline-block;
  margin-bottom: 4px; 
}

.column-header-title {
  display: block;
}

/* =========================================
   CARDS & ITEMS (Talks, Posters, Breaks)
========================================= */
.talk-card {
  all: unset;
  box-sizing: border-box;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  cursor: pointer;
  background: var(--color-bg);
  border: 1px solid var(--color-grey-lighter);
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.talk-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.talk-card-content {
  flex: 1;
  padding-right: 20px;
}

.type-tag {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-grey-light);
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.room-badge {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  background: #f4ecf8;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.talk-card h2 {
  font-family: var(--font-sans);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-phrase);
  margin: 0 0 8px;
  line-height: 1.3;
}

.speaker {
  font-size: 1.1rem;
  color: var(--color-grey-light);
}

.speaker b {
  color: var(--color-primary);
  font-weight: bold;
}

.more {
  display: inline-block;
  margin-top: 15px;
  color: var(--color-grey-light);
  font-weight: 600;
  font-size: 0.95rem;
}

.speaker-img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--color-grey-lighter);
}

.plain {
  padding: 20px 0;
  color: var(--color-grey-light);
  font-size: 1.1rem;
}

.plain.info {
  color: var(--color-phrase);
  font-weight: bold;
  font-family: var(--font-sans);
}

.plain.info .speaker b, 
.plain.info .speaker,
.plain.info .speaker strong {
  font-family: var(--font-main); 
  font-weight: normal;           
  font-size: 1.1rem;             
  color: var(--color-grey-light) !important;
}

.item-break {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 15px 0;
  position: relative;
  z-index: 2; 
}

.item-break-content {
  background-color: var(--color-bg);
  border: none;
  color: var(--color-grey-light);
  padding: 6px 16px;
  border-radius: 20px; 
  font-size: 1.30rem;
  font-style: italic;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* =========================================
   DETAIL SHEET (Pop-up Dialog)
========================================= */
dialog.event-sheet {
  border: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  position: fixed;
  inset: 0 0 0 auto;
  margin: 0;
  width: min(650px, 100%);
  height: 100%;
  max-height: 100%;
  box-shadow: -10px 0 40px rgba(0,0,0,0.15);
}

dialog.event-sheet::backdrop {
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(3px);
}

.sheet {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.sheet-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: calc(20px + env(safe-area-inset-top, 0px)) 30px 20px;
  border-bottom: 1px solid var(--color-grey-lighter);
}

.sheet-bar span {
  font-family: var(--font-sans);
  color: var(--color-primary);
  font-weight: bold;
  font-size: 1rem;
}

.sheet-close {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-grey-lighter);
  border-radius: 30px;
  padding: 8px 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sheet-close:hover {
  background: #f0f0f0;
}

.sheet-body {
  overflow-y: auto;
  padding: 30px 30px calc(40px + env(safe-area-inset-bottom, 0px));
}

.sheet-body h2 {
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-phrase);
  margin: 0 0 15px;
}

.sheet-body h3 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 40px 0 10px;
  text-transform: uppercase;
}

.popup-speaker-header {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-bottom: 20px;
}

.popup-speaker-img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-grey-lighter);
  flex-shrink: 0;
}

.who {
  font-size: 1.2rem;
  font-weight: bold;
  margin: 0;
  color: var(--color-primary);
}

.who span {
  display: block;
  color: var(--color-grey-light);
  font-weight: normal;
  font-size: 1.1rem;
}

.prose p {
  text-align: justify;
  margin: 0 0 1.2em;
}

.sheet-nav {
  display: flex;
  gap: 15px;
  margin-top: 50px;
}

.sheet-nav button {
  flex: 1;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-grey-lighter);
  border-radius: 30px;
  padding: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sheet-nav button:hover:not(:disabled) {
  background: #f0f0f0;
}

.sheet-nav button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* =========================================
   UTILITIES & MEDIA QUERIES
========================================= */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .parallel-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .parallel-grid .session-column:first-child,
  .parallel-grid .session-column:last-child {
    padding: 0;
    border-left: none;
  }
  
  .parallel-grid .session-column:last-child .column-header {
    margin-top: 25px; 
  }
}

@media (max-width: 600px) {
  dialog.event-sheet { 
    width: 100vw; 
    max-width: 100vw; 
    border-radius: 0; 
  }
  .row { grid-template-columns: 60px 1fr; gap: 0 15px; }
  .time { font-size: 1rem; padding-top: 20px; }
  .slot::before { top: 25px; }
  .talk-card { flex-direction: column; align-items: flex-start; text-align: left; }
  .talk-card-content { padding-right: 0; margin-bottom: 15px; }
  .speaker-img { align-self: flex-start; width: 90px; height: 90px; }
  .popup-speaker-header { flex-direction: column; align-items: flex-start; gap: 15px; }
}

@media (prefers-reduced-motion: no-preference) {
  dialog.event-sheet[open] { animation: slide 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
  @keyframes slide { from { transform: translateX(100%); } to { transform: translateX(0); } }
}