/* ==========================================================================
   YEAR TIMELINES — NEW STRUCTURE, OLD AESTHETIC
   - Tokens inspired by your previous stylesheet
   - Works with the new index.html classes
   - Years-only grid, sticky labels, chip events, gap "~" markers
   ======================================================================= */

/* ==============
   1) DESIGN TOKENS
   ============== */

:root {
  --year-col-w: auto;         /* width of each year/gap column */
  --label-col-w: 100px;        /* width of the sticky timeline label column */
  --chip-min-w: auto;         /* min width of event chips */
  --radius-sm: 6px;
  --radius-md: 10px;
  --pad-xs: 4px;
  --pad-sm: 6px;
  --pad-md: 10px;
  --pad-lg: 14px;
}

/* Light/Dark themes echo your prior palette */
body[data-theme="light"] {
  --background: #ffffff;
  --ink: #2a2d30;
  --muted: #788491;

  --g-outline: #f7f7f7;
  --g-panel: #fdfdfd;
  --g-bar: #e1e1e1;

  background: var(--background);
  color: var(--ink);
}

body[data-theme="dark"] {
  --background: #2a2d30;
  --ink: #ffffff;
  --muted: #b2b8bd;

  --g-outline: #222427;
  --g-panel: #313538;
  --g-bar: #3d4145;

  background: var(--background);
  color: var(--ink);
}

/* ==============
   2) BASE ELEMENTS
   ============== */

* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}
small, .small { font-size: 12px; color: var(--muted); }

/* ==============
   3) APP CHROME
   ============== */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--g-bar);
  background: var(--g-outline);
}
.app-title {
  font-size: 18px;
  margin: 0;
}

.controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn {
  background: var(--g-panel);
  color: var(--ink);
  border: 1px solid var(--g-bar);
  border-radius: 4px;
  padding: 0.5em 1em 0.4em 1em;
  cursor: pointer;
  display: flex;
  align-items: center;
  font-size: 10px;
  white-space: nowrap;
  line-height: 1em;
  text-transform:uppercase;
}
.btn:hover {
  filter: brightness(1.08);
  background: var(--ink);
  color: var(--background);
}
.btn.primary {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--background);
}
.btn.primary:hover {
  filter: brightness(1.05);
}
.btn.danger {
  border-color: #9c5454;
  background: #ffeaea;
  color: #9c5454;
  text-transform: uppercase;
}
.btn.confirm {
  background: #fff3f3;
  color: #b00020;
  border-color: #b00020;
}

.app-main {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - 56px);
}

/* ==============
   4) VIEWPORT & GRID
   ============== */

.viewport {
  position: relative;
  overflow: auto;
  min-height: 60vh;
  background: var(--background);
}

.year-grid {
  display: grid;
  gap: 6px;
  padding: 12px;
  min-width: max-content;  /* avoid squashing */
}

/* Rows inside grid are flex so header and body align naturally */
.row {
  display: flex;
  gap: 1em;
  align-items: stretch;
}
.row.gap {
  gap:0.5em;
}

/* Generic column primitive */
.col {
  background: var(--g-panel);
  border: 1px solid var(--g-outline);
  border-radius: var(--radius-sm);
  min-width: var(--year-col-w);
  position: relative;
}

.explanation {
  font-size: 0.8rem;
  color: var(--muted);
  padding:2em;
  margin: 0 auto;
  max-width: 600px;
}

/* ==============
   5) YEARS HEADER
   ============== */

.years-header {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--background);
  padding-bottom: 4px;
}

.year-col,
.gap-col {
  min-width: var(--year-col-w);
  text-align: center;
  padding: 8px 6px;
  color: var(--muted);
  white-space: nowrap;
  font-size: 12px;
  background: var(--g-panel);
}
.year-col {
  color: var(--ink);
  font-weight: 600;
}
.gap-col {
  font-weight: 500;
  font-style: italic;
  letter-spacing: 1px;
}

/* ==============
   6) TIMELINE ROWS
   ============== */

.timeline-row {
  /* left label + all columns */
}

/* Sticky label on the left */
.label-col {
  position: sticky;
  left: 0;
  z-index: 2;
  min-width: var(--label-col-w);
  max-width: var(--label-col-w);
  background: var(--background);
  border: 1px solid var(--g-bar);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 8px;
  text-align: center;
  font-weight: 600;
  letter-spacing: .2px;
}

/* Body cells for years and gaps */
.year-body-col,
.gap-body-col {
  min-width: var(--year-col-w);
  background: var(--g-panel);
  border: 1px solid var(--g-outline);
  border-radius: var(--radius-sm);
  padding: 6px;
}

/* Add a faint horizontal guide through each year column */
.year-body-col::before,
.gap-body-col::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: calc(100% + 2px);
  height: 1px;
  background: var(--g-bar);
  pointer-events: none;
}

/* ===== Unified grid cells for header + rows ===== */
.year-grid {
  display: grid;
  gap: 6px;
  padding: 12px;
  min-width: max-content;
  /* JS sets grid-template-columns dynamically to:
     var(--label-col-w) repeat(N, var(--year-col-w)) */
  grid-auto-rows: minmax(auto, auto);
}

.cell {
  justify-content:start;
  align-items: center;
  display: flex;
  background: var(--g-panel);
  border: 1px solid var(--g-outline);
  border-radius: var(--radius-sm);
  padding: 6px;
  position: relative;
  min-width: 0; /* allow inner content to shrink */
  flex-direction: row;
  gap: 0.5em;
}

/* Header cells */
.cell.header {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  background: transparent;
  border: none;
}
.cell.header.label-header {
  background: var(--g-panel);
  background: linear-gradient(90deg,var(--background) 0%, var(--background) 80%, rgba(237, 221, 83, 0) 100%);
}
.cell.header.gap-header {
  color: var(--muted);
  font-style: italic;
  letter-spacing: 1px;
}
.cell.gap-body {
  background:transparent;
  border:none;
}

/* Sticky first column (label) for both header and body */
.label-header,
.label-cell {
  position: sticky;
  left: 0;
  z-index: 3;
  background: var(--background);            /* sit above scrolling content */
  background: linear-gradient(90deg,var(--background) 0%, var(--background) 80%, rgba(237, 221, 83, 0) 100%);
  border: 1px solid var(--g-background);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--label-col-w);
}
.label-cell {
  font-weight: 600;
  letter-spacing: .2px;
  text-align: center;
  padding: 10px 8px;
}
.label-inner {
  width:100%;
  background:var(--background);
  border:1px solid var(--tlCol, var(--g-bar));
  padding: 4px 1.5em 4px 6px;
  border-radius: 4px;
  font-weight: normal;
  color: var(--ink);
  font-size: 0.6em;
  text-align: left;
  font-style: italic;
  text-transform: uppercase;
}
.label-inner:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 100%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -18px;
  background-color:var(--tlCol, var(--g-bar));
  border-radius: 25px;
}

/* Year body cells get a faint midline (like your previous aesthetic) */
.year-body::before,
.gap-body::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: calc(100% + 10px);
  height: 1px;
  background: var(--g-bar);
  pointer-events: none;
  z-index: 1;
}

/* Keep your existing chip + collapse styles working inside .cell */


/* === Timeline toggles (above grid) === */
.toggles-container {
  display:flex;
  position:sticky;
  left:0;
  background:var(--background);
  width:100%;
  justify-content: space-between;
  align-items: start;
  padding: 1em 1em 0 1em;
}
.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--g-bar);
  background: var(--background);
  position: sticky;
  left: 0;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--g-panel);
  border: 1px solid var(--g-outline);
  border-radius: 999px;
  padding: 4px 10px 4px 8px;
}

.toggle input[type="checkbox"] {
  accent-color: var(--tlCol, var(--g-bar));
  width: 14px;
  height: 14px;
  cursor: pointer;
}

.toggle .swatch {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--tlCol, var(--g-bar));
  outline: 1px solid var(--g-bar);
}

.toggle .label {
  font-size: 12px;
  color: var(--ink);
  white-space: nowrap;
}


/* ==============
   7) EVENTS (CHIPS)
   ============== */

.event.chip {
  --image-width:30px;
  --image-width-half:calc(var(--image-width) / 2);

  display: flex;
  position:relative;
  align-items: center;
  gap: 1em;
  border: 1px solid var(--tlCol, var(--g-bar));
  background: var(--background);
  border-radius: var(--radius-md);
  min-width: var(--chip-min-w);
  margin: 0 0 0 var(--image-width-half);
  padding: 0px 0 0 var(--image-width-half);
  z-index:2;
  /* width: calc(100% - var(--image-width-half));*/
}

/* Optional image on left */
.chip-img {
  display: block;
  width: var(--image-width);
  height: var(--image-width);
  object-fit: cover;
  border-radius: 50%;
  outline: 1px solid var(--tlCol, var(--g-bar));
  background: var(--g-outline);
  flex-shrink: 1;
  position: absolute;
  left: calc(var(--image-width-half) * -1);
}

/* Text content */
.chip-content {
  display: flex;
  flex-direction: column;
  padding: 0.5em 1em 0.5em 0.5em;
  min-width: 0; /* enable truncation if needed */
}
.chip-title {
  display:flex;
  align-items: center;
  justify-content: space-between;
  gap:1em;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.2;
  color: var(--ink);
}
.chip-title span {
  display: inline-block;
  position: relative;
  font-size: 0.8em;
  font-weight:normal;
  color: var(--muted);
  font-style: italic;
}
.chip-desc {
  font-size: 10px;
  color: var(--muted);
  line-height: 1.4em;
  max-width:300px;
}
.chip-desc em {
  display:inline-block;
  color:color-mix(in srgb, var(--tlCol, var(--g-bar)) 100%, var(--ink) 30%);
  padding:0px 0px 0px 0;
  border-radius:4px;
  margin:1em 3px 0 0;
  text-transform: uppercase;
  font-size: 0.8em;
  line-height:1em;
  top: -1.5px;
  position: relative;
}
.chip-desc em:after {
  content:":";
}
.chip-desc strong {
  font-weight: normal;
  text-decoration: underline;
  text-decoration-color:color-mix(in srgb, var(--tlCol, var(--g-bar)) 100%, var(--ink) 30%);
  background-color:color-mix(in srgb, var(--tlCol, var(--g-bar)) 5%, var(--background) 100%);
}

#desc-tooltip .chip-desc {
  --tcol:var(--ink);
  background-color:white;
  max-width: 360px;
  border:1px solid color-mix(in srgb, var(--background) 100%, var(--ink) 30%);
  border-radius:3px;
  padding:0.2em 1em 0.5em 1em;
}
#desc-tooltip .chip-desc * {
  color:var(--ink);
}

.event.chip.no-img {
  padding-left:0.1em;
  margin:0;
}
.event.chip.no-desc {
  
}

/* Gap marker between non-consecutive visible years */
.event.collapse {
  display: inline-flex;
  position:relative;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin: auto;
  border-radius: 999px;
  border: 1px dashed var(--g-bar);
  color: var(--muted);
  background: var(--background);
  font-weight: 700;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  z-index:2;
}

/* ==============
   8) EDITOR / ADMIN
   ============== */

.panel.editor {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  grid-template-rows: auto 1fr;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(2px);
}
.panel.editor.hidden { display: none; }

.editor[aria-hidden="false"] .editor-header,
.editor[aria-hidden="false"] .editor-body {
  pointer-events: auto;
}

/* Editor card */
#editor .editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--g-outline);
  background: var(--g-bar);
}
#editor .editor-body {
  margin: 4vh auto;
  width: min(1200px, 96vw);
  height: 84vh;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  background: var(--background);
  border: 1px solid var(--g-outline);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}

/* Sidebar */
#timeline-list.list {
  width: 100%;
  height: auto;
  padding: 8px;
  background: var(--g-panel);
  color: var(--ink);
  border: 0px solid var(--g-bar);
  border-radius: 8px;
}

/* Custom listbox container */
.listbox {
  display: grid;
  gap: .4rem;
  /* max-height: 16rem;            similar to size="6" */
  overflow: auto;
  padding: 1em;
  border: 0px solid var(--border, #ddd);
  border-radius: .5rem;
  background: transparent;
}

/* Individual option */
.listbox .option {
  position: relative;
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .7rem .5rem 1.5rem;
  border-radius: .5rem;
  cursor: pointer;
  outline: none;
  border: 1px solid transparent;
  background: #fff;
  transition: box-shadow .12s ease, background .12s ease, border-color .12s ease;
}

/* Colour swatch (from --tlCol) */
.listbox .option::before {
  content: "";
  position: absolute;
  left: .4rem;
  width: .5rem;
  height: 1.2rem;
  border-radius: .25rem;
  background: var(--tlCol, #8aa);
  opacity: .9;
}

/* Default state tweak via data-state if you want different styling per state */
.listbox .option[data-state="default"] {
  /* Example: slightly tinted border */
  border-color: color-mix(in oklab, var(--tlCol, #8aa) 25%, transparent);
}

/* Hover/focus */
.listbox .option:hover,
.listbox .option:focus {
  background: #f3f6fa;
  border-color: color-mix(in oklab, var(--tlCol, #8aa) 35%, #cfd6e0);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--tlCol, #8aa) 30%, transparent);
}

/* Active/selected */
.listbox .option[aria-selected="true"] {
  background: color-mix(in oklab, var(--tlCol, #8aa) 15%, #ffffff);
  border-color: var(--tlCol, #8aa);
  box-shadow: inset 0 0 0 1px var(--tlCol, #8aa);
  font-weight: 600;
}

/* Keyboard focus ring (when selected) */
.listbox .option[aria-selected="true"]:focus {
  box-shadow:
    inset 0 0 0 1px var(--tlCol, #8aa),
    0 0 0 3px color-mix(in oklab, var(--tlCol, #8aa) 35%, transparent);
}


/* Timeline editor area */
#timeline-editor {
  padding: 0px;
  overflow: auto;
}
.timeline-editor-head h3 {
  margin: 0;
}
.timeline-editor-head {
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap:1em 0.5em;
  background:var(--g-outline);
  padding:8px 12px;
  border-bottom:1px solid var(--g-bar);
  flex-wrap: wrap;
  position:sticky;
  top:0;
  z-index:1;
}
.timeline-editor-body {
  padding:1em;
}

#tl-title {
  width: 100%;
}
#tl-color {
  width:100px;
  max-width: 120px;
  background: var(--g-panel);
  border: 1px solid var(--g-bar);
  border-radius: 3px;
  padding: 1px 3px;
}

label {
  display: flex;
  gap: 1em;
  align-items: center;
  font-size: 0.6em;
  white-space: nowrap;
}

/* Events table */
.events-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 8px;
  background: var(--g-panel);
  border: 1px solid var(--g-bar);
  border-radius: 8px;
  overflow: hidden;
}
.events-table th,
.events-table td {
  border-bottom: 1px solid var(--g-bar);
  padding: 10px;
  vertical-align: top;
  text-align: left;
}
.events-table thead th {
  position: relative;
  z-index: 0;
  background: var(--g-bar);
  color: var(--ink);
  font-weight: 700;
}
.events-table tr:last-child td {
  border-bottom: none;
}

input[type="text"] {
  --pad: 6px;
  background: var(--background);
  color: var(--ink);
  border: 1px solid var(--g-bar);
  border-radius: 6px;
  padding: var(--pad);
  width: 100%;
}
input.invalid {
  border-color: #ff7b7b;
  outline: 1px solid #ff7b7b;
}

textarea {
  --pad: 6px;
  background: var(--background);
  color: var(--ink);
  border: 1px solid var(--g-bar);
  border-radius: 6px;
  padding: var(--pad);
  width: 300px;
  font-family: inherit;
}

/* Image input + preview */
.img-cell {
  display: flex;
  align-items: center;
  gap: 8px;
}
.img-preview {
  width: 30px;
  height: 30px;
  object-fit: cover;
  border-radius: 6px;
  background: var(--g-bar);
  outline: 1px solid var(--g-bar);
}

/* Footer */
.app-footer {
  padding: 10px 16px 20px;
  color: var(--muted);
}

/* ==============
   9) SCROLLBARS (subtle)
   ============== */
.viewport::-webkit-scrollbar,
#timeline-editor::-webkit-scrollbar {
  height: 10px;
  width: 10px;
}
.viewport::-webkit-scrollbar-thumb,
#timeline-editor::-webkit-scrollbar-thumb {
  background: var(--g-bar);
  border-radius: 999px;
}
.viewport::-webkit-scrollbar-track,
#timeline-editor::-webkit-scrollbar-track {
  background: transparent;
}


#timeline-list .option.dragging {
  opacity: 0.6;
}

#timeline-list .option.drag-over {
  outline: 2px dashed rgba(0,0,0,0.35);
  outline-offset: 2px;
}