/* Programme editor (admin) */
.program-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 20px; align-items: start; }
.program-layout > * { min-width: 0; }
@media (max-width: 1000px) { .program-layout { grid-template-columns: minmax(0, 1fr); } }
.program-side { position: sticky; top: 12px; }
.program-grid { width: 100%; border-collapse: separate; border-spacing: 6px; min-width: 560px; }
.program-grid th { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); text-align: left; padding: 4px; }
.program-grid .time-col { width: 110px; white-space: nowrap; vertical-align: top; font-family: var(--mono); text-transform: none; color: var(--text); }
.program-grid td { vertical-align: top; }
.program-grid td.plenary { background: var(--accent-soft); color: var(--accent); font-weight: 600; text-align: center; padding: 12px; border-radius: 8px; }
.cell { min-width: 200px; }
.session-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 12px; box-shadow: var(--shadow); }
.session-card.full { border-color: color-mix(in srgb, var(--warn) 55%, transparent); }
.session-head { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.dropzone { list-style: none; margin: 8px 0 4px; padding: 4px; min-height: 44px; border: 2px dashed transparent; border-radius: 8px; background: var(--surface-2); }
.dropzone.over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone.unscheduled { max-height: 70vh; overflow-y: auto; }
.paper-card { background: var(--surface-solid); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; margin-bottom: 6px; font-size: .85rem; line-height: 1.35; cursor: grab; }
.paper-card small { display: block; }
.paper-card.dragging { opacity: .45; }
.paper-time { display: block; font-family: var(--mono); font-size: .75rem; color: var(--accent); }
.paper-time:empty { display: none; }
.add-session { text-align: center; padding: 14px 0; border: 1px dashed var(--border); border-radius: 8px; }
.session-edit summary { font-size: .8rem; }
.compact-form input, .compact-form select { margin-bottom: 8px; }
.compact-form .field { margin-bottom: 8px; }
.room-list { list-style: none; padding: 0; margin: 0 0 12px; }
.room-list li { display: flex; gap: 6px; align-items: center; margin-bottom: 6px; }
.btn-link.small { font-size: .75rem; }
.paper-filter { margin-bottom: 8px; }
.setup { margin-top: 20px; }

/* Public programme: the time is a bar above each row, and every parallel
   session gets its own column (as many columns as sessions in the slot), so
   up to six parallel sessions sit side by side on a desktop screen. */
.program-day { margin-bottom: 36px; scroll-margin-top: 12px; }
.program-slot { padding: 14px 0 6px; border-top: 1px solid var(--border); }
.slot-time { display: inline-block; font-family: var(--mono); font-weight: 600; font-size: .85rem; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 3px 12px; margin-bottom: 10px; }
.plenary-label { font-weight: 600; }
.is-plenary { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: baseline; background: var(--accent-soft); border-radius: 12px; padding: 12px 14px; border-top: 0; margin: 10px 0; }
.is-plenary .slot-time { background: var(--surface); margin-bottom: 0; }
.slot-sessions { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; align-items: start; }
.slot-sessions[data-cols="2"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.slot-sessions[data-cols="3"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.slot-sessions[data-cols="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.slot-sessions[data-cols="5"] { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.slot-sessions[data-cols="6"] { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.public-session { margin-bottom: 0; padding: 14px 16px; min-width: 0; }
.public-session h3 { font-size: 1rem; margin-bottom: 4px; overflow-wrap: anywhere; }
.public-papers { list-style: none; padding: 0; margin: 8px 0 0; }
.public-papers li { padding: 7px 0; border-top: 1px solid var(--border); font-size: .88rem; line-height: 1.35; overflow-wrap: anywhere; }
.public-papers .paper-time { display: block; font-size: .75rem; margin-bottom: 2px; }
/* Denser cards when many sessions run in parallel. */
.slot-sessions[data-cols="3"] .public-session, .slot-sessions[data-cols="4"] .public-session,
.slot-sessions[data-cols="5"] .public-session, .slot-sessions[data-cols="6"] .public-session { padding: 12px; }
.slot-sessions[data-cols="4"] .public-papers li, .slot-sessions[data-cols="5"] .public-papers li,
.slot-sessions[data-cols="6"] .public-papers li { font-size: .82rem; }
.slot-sessions[data-cols="4"] h3, .slot-sessions[data-cols="5"] h3, .slot-sessions[data-cols="6"] h3 { font-size: .92rem; }
.slot-sessions[data-cols="5"] .session-cal, .slot-sessions[data-cols="6"] .session-cal { font-size: .75rem; }
/* Narrower screens: at most 3, then 2, then 1 column. */
@media (max-width: 1080px) {
  .slot-sessions[data-cols="4"], .slot-sessions[data-cols="5"], .slot-sessions[data-cols="6"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .slot-sessions[data-cols] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .slot-sessions[data-cols="1"] { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) { .slot-sessions[data-cols] { grid-template-columns: minmax(0, 1fr); } }