/* Broadside demo. Phone first: panels are bottom sheets under 900 px and a side drawer above. */
:root {
  --bg: #eef1f5;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #5d6b7c;
  --line: #d5dbe3;
  --accent: #1f5fae;
  --accent-soft: #e3edf9;
  --bar: #1f3a5f;
  --bar-text: #ffffff;
  --ok: #1d7a3a;
  --warn: #9a6400;
  --bad: #b3261e;
  --tap: 44px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); font: 15px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif; overscroll-behavior: none; }
#app, .app { height: 100%; display: flex; flex-direction: column; min-width: 0; }
.booting { margin: 16px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { opacity: 0.45; cursor: default; }
h2, h3 { margin: 0; }
h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); margin-bottom: 8px; }
small { color: var(--muted); }

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 4px; min-width: 0; background: var(--bar); color: var(--bar-text);
  padding: max(4px, env(safe-area-inset-top)) max(6px, env(safe-area-inset-right)) 4px max(6px, env(safe-area-inset-left));
}
.topbar .title { flex: 1; min-width: 0; display: flex; align-items: center; gap: 6px; font-weight: 600; }
.topbar .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar .edited { font-size: 11px; font-weight: 500; background: #f2b84b; color: #2b1d00; border-radius: 8px; padding: 1px 6px; }
.topbar .pager, .topbar .zoom { display: flex; align-items: center; }
.topbar .page, .topbar .percent { min-width: 4.2em; text-align: center; font-variant-numeric: tabular-nums; font-size: 14px; }
.icon { min-width: var(--tap); min-height: var(--tap); border: 0; background: transparent; border-radius: 8px; font-size: 20px; line-height: 1; display: inline-flex; align-items: center; justify-content: center; }
.topbar .icon:hover:not(:disabled) { background: rgba(255, 255, 255, 0.14); }
.icon.small { min-width: 32px; min-height: 32px; font-size: 15px; }
.wide-only { display: none !important; }

.message { display: flex; align-items: center; gap: 8px; padding: 4px 4px 4px 12px; background: #fff8d6; border-bottom: 1px solid #e6d98c; overflow-wrap: anywhere; }
.message span { flex: 1; }
.link-sheet { background: #e8f0fe; border-bottom-color: #aecbfa; }
.link-sheet .link-open, .link-sheet .link-cancel { padding: 6px 14px; border-radius: 6px; font: inherit; text-decoration: none; }
.link-sheet .link-open { background: var(--accent); color: #fff; }
.link-sheet .link-cancel { background: transparent; border: 1px solid #aecbfa; }

/* Workspace: the viewer and the sheet */
.workspace { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.stage { flex: 1; min-height: 0; display: flex; position: relative; }
.viewer { flex: 1; min-height: 0; min-width: 0; }
.empty { margin: auto; color: var(--muted); }

.sheet {
  display: flex; flex-direction: column; background: var(--surface); border-top: 1px solid var(--line);
  box-shadow: 0 -6px 18px rgba(16, 32, 56, 0.12); border-radius: 14px 14px 0 0; max-height: 58%; min-height: 0;
}
.sheet-handle { width: 40px; height: 4px; border-radius: 2px; background: var(--line); margin: 6px auto 0; }
.sheet-header { display: flex; align-items: center; justify-content: space-between; padding: 2px 6px 2px 16px; }
.sheet-header h2 { font-size: 17px; }
.sheet-body { overflow: auto; padding: 4px 16px 16px; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; }

/* Tool tabs */
.tabs {
  display: flex; overflow-x: auto; background: var(--surface); border-top: 1px solid var(--line); scrollbar-width: none;
  padding: 0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: 1 0 64px; min-height: 52px; border: 0; background: transparent; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1px; color: var(--muted); padding: 4px 2px; }
.tab .glyph { font-size: 19px; line-height: 1.1; font-weight: 600; }
.tab .label { font-size: 11px; }
.tab.active { color: var(--accent); box-shadow: inset 0 3px 0 var(--accent); }

/* Panel content */
.panel-section { margin: 4px 0 16px; }
.hint { color: var(--muted); font-size: 13px; margin: 6px 0; }
.row { display: flex; align-items: center; gap: 8px; }
.row.between { justify-content: space-between; }
.row input { flex: 1; min-width: 0; }
input:not([type=checkbox]):not([type=file]), select, textarea {
  min-height: var(--tap); border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; background: #fff; width: 100%; font-size: 16px;
}
.row input { width: auto; }
button:not(.icon):not(.tab):not(.list-item):not(.tree-label):not(.thumbnail) {
  min-height: var(--tap); padding: 0 14px; border-radius: 8px; border: 1px solid var(--line); background: #f7f9fc;
}
button.primary { background: var(--accent) !important; color: #fff; border-color: var(--accent) !important; width: 100%; }
.button-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 8px; }
.check { display: flex; align-items: center; gap: 10px; min-height: var(--tap); }
.check input { width: 20px; height: 20px; }
.value { min-width: 3em; text-align: center; font-variant-numeric: tabular-nums; }
.notice { background: #fff8d6; border: 1px solid #e6d98c; border-radius: 8px; padding: 8px 12px; margin: 4px 0 12px; }
.notice p { margin: 0 0 8px; }

.list { list-style: none; margin: 0; padding: 0; }
.list > li { border-bottom: 1px solid var(--line); }
.list-item { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; width: 100%; min-height: var(--tap); padding: 8px 4px; border: 0; background: transparent; text-align: left; }
.list-item.current { background: var(--accent-soft); }
.list > li.row .list-item { flex: 1; }

.file-picker { display: flex; align-items: center; justify-content: center; position: relative; min-height: 52px; border: 2px dashed var(--line); border-radius: 10px; color: var(--accent); font-weight: 600; }
.file-picker input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

.segmented { display: flex; gap: 4px; background: var(--bg); border-radius: 10px; padding: 3px; margin: 2px 0 12px; }
.segmented.wrap { flex-wrap: wrap; }
.segmented button { flex: 1 1 auto; border: 0 !important; background: transparent !important; min-height: 38px !important; }
.segmented button.active { background: var(--surface) !important; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15); font-weight: 600; }

.tree, .tree ul { list-style: none; margin: 0; padding: 0; }
.tree-row { display: flex; align-items: center; min-height: 36px; }
.tree-spacer { display: inline-block; width: 32px; flex: none; }
.tree-label { flex: 1; min-height: 36px; border: 0; background: transparent; text-align: left; padding: 4px; display: flex; justify-content: space-between; gap: 8px; }
.tag { display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; padding: 4px; }
.tag code { background: var(--accent-soft); color: var(--accent); border-radius: 4px; padding: 0 5px; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 4px 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

.diagnostic { padding: 6px 0; font-size: 13px; }
.diagnostic.warning strong { color: var(--warn); }
.diagnostic.error strong { color: var(--bad); }

.thumbnails { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 12px; }
.thumbnail { width: 100%; border: 2px solid transparent; border-radius: 6px; background: transparent; padding: 4px; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.thumbnail.current { border-color: var(--accent); }
.thumbnail img, .thumbnail .placeholder { width: 100%; aspect-ratio: auto; background: #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2); display: block; }
.thumbnail .placeholder { aspect-ratio: 0.77; }

.form-fields .field { padding: 8px 0; display: flex; flex-direction: column; gap: 4px; border-bottom: 1px solid var(--line); }
.form-fields .field.focused label { color: var(--accent); font-weight: 600; }
.form-fields input[type=checkbox] { width: 24px; height: 24px; }

.badge { display: inline-block; border-radius: 10px; padding: 1px 8px; font-size: 12px; font-weight: 600; background: var(--bg); }
.badge.valid { background: #dff3e5; color: var(--ok); }
.badge.invalid { background: #fbe1df; color: var(--bad); }
.badge.indeterminate { background: #fff1d1; color: var(--warn); }
.signature { padding: 8px 0; }
.problems { margin: 4px 0; padding-left: 18px; font-size: 13px; }

.create { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.create label:not(.check) { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }

/* Wider screens: the sheet becomes a drawer beside the viewer, zoom controls join the top bar. */
@media (min-width: 900px) {
  .wide-only { display: flex !important; }
  .workspace { flex-direction: row; }
  .sheet { width: 380px; max-height: none; border-top: 0; border-left: 1px solid var(--line); border-radius: 0; box-shadow: -6px 0 18px rgba(16, 32, 56, 0.08); }
  .sheet-handle { display: none; }
  .tabs { justify-content: center; }
  .tab { flex: 0 0 84px; }
}