/* Yolt v11 — loading skeletons + spinners
 * Source: _DESIGN_HANDOFF/_DESIGN_BATCH_4a_redesigns-empty-loading.html (Section C)
 * Patterns: .skel-bar · .skel-table · .skel-card · .skel-chart · spinner-{sm,md,lg} · progress-bar-indeterminate
 */

/* ════════ §C LOADING / SKELETONS ════════ */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes bar-sweep {
  0% { transform: translateX(-40%); }
  100% { transform: translateX(240%); }
}

.skel-bar {
  display: block;
  background: linear-gradient(
    90deg,
    var(--bg-2) 0%,
    color-mix(in oklch, var(--bg-3) 60%, var(--bg-2)) 50%,
    var(--bg-2) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
  border-radius: 4px;
}

.skel-table {
  background: var(--bg-1); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; display: flex; flex-direction: column; gap: 10px;
}
.skel-table .skel-row { display: grid; grid-template-columns: 28px 1fr 80px 60px 60px; gap: 10px; align-items: center; }
.skel-table .skel-row.head { padding-bottom: 6px; border-bottom: 1px solid var(--line-soft); }

.skel-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.skel-card {
  background: var(--bg-1); border: 1px solid var(--line-soft); border-radius: 10px;
  padding: 14px; display: flex; flex-direction: column; gap: 10px;
  animation: pulse 2s ease-in-out infinite;
}
.skel-card.compound .skel-row3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; padding-top: 8px; border-top: 1px dashed var(--line); }
.skel-card .skel-foot { display: flex; gap: 8px; align-items: center; }

.skel-chart {
  background: var(--bg-1); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px; height: 200px; position: relative;
  display: flex; flex-direction: column; gap: 10px;
}
.skel-chart .skel-grid {
  flex: 1; position: relative;
  background-image: repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 25%);
  animation: pulse 2s ease-in-out infinite;
}
.skel-chart .skel-curve {
  position: absolute; inset: 12px 0 12px 0;
  stroke: var(--ink-4); stroke-width: 1.5; fill: none; opacity: 0.5;
  animation: pulse 2s ease-in-out infinite;
}
.skel-chart .skel-axis { display: flex; justify-content: space-between; gap: 6px; }
.skel-chart .skel-axis .skel-bar { height: 7px; width: 36px; }

.spinner { display: inline-block; border-radius: 50%; vertical-align: middle; animation: spin 0.85s linear infinite; }
.spinner-sm { width: 16px; height: 16px; border: 2px solid color-mix(in oklch, var(--brand) 25%, transparent); border-top-color: var(--brand); }
.spinner-md { width: 24px; height: 24px; border: 2.5px solid color-mix(in oklch, var(--brand) 25%, transparent); border-top-color: var(--brand); }
.spinner-lg { width: 40px; height: 40px; border: 3px solid color-mix(in oklch, var(--brand) 25%, transparent); border-top-color: var(--brand); }

.progress-bar-indeterminate {
  height: 3px; background: var(--bg-2); border-radius: 2px; overflow: hidden; position: relative;
}
.progress-bar-indeterminate::after {
  content: ""; position: absolute; inset: 0;
  width: 40%;
  background: linear-gradient(90deg, transparent 0%, var(--brand) 50%, transparent 100%);
  animation: bar-sweep 1.4s ease-in-out infinite;
}

.spinner-demo {
  background: var(--bg-1); border: 1px solid var(--line); border-radius: 10px;
  padding: 24px; display: flex; align-items: center; justify-content: center; gap: 32px;
}
.spinner-demo .lbl { display: flex; flex-direction: column; align-items: center; gap: 8px; font-size: 11px; color: var(--ink-3); font-family: 'JetBrains Mono', ui-monospace, monospace; }