/* =============================================================
 * Utilities Bunker — Gradient Generator (v2.1)
 * File: /assets/css/modules/colors/gradient-generator.v2.1.css
 * Purpose:
 * - Tool-only layout + preview canvas + stop editor styling
 * - Mobile-first, 44x44 touch targets, clamp typography
 * - No changes to ub-toolkit.v2.1.css
 * ============================================================= */

/* ============================== Local tokens (tool-scoped) ============================== */
:root{
  --gg-radius: 16px;
  --gg-gap: 14px;
}

/* ============================== Hero layout ============================== */
.ub-hero{
  display:grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--gg-gap);
}

@media (max-width: 980px){
  .ub-hero{ grid-template-columns: 1fr; }
}

/* ============================== Preview panel ============================== */
.ub-grad-previewwrap{
  background: var(--ub-surface-2);
  border: 1px solid var(--ub-border);
  border-radius: var(--gg-radius);
  padding: 12px;
}

.ub-grad-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap: 10px;
  flex-wrap:wrap;
  margin-bottom: 10px;
}

.ub-grad-title{
  font-size: clamp(13px, 1.2vw, 14px);
  font-weight: 950;
  letter-spacing: .01em;
}

.ub-grad-sub{
  font-size: 12px;
  color: var(--ub-muted);
  margin-top: 2px;
}

/* KPI tiles: reuse toolkit’s .ub-kpi/.ub-kpis if present; safe anyway */
.ub-kpis{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
  justify-content:flex-end;
}
.ub-kpi{
  min-width: 112px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-card-bg);
}
.ub-kpi .k{
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--ub-muted);
}
.ub-kpi .v{
  font-family: var(--ub-mono);
  font-weight: 950;
  font-size: 14px;
  margin-top: 2px;
}

/* ============================== Preview canvas ============================== */
.ub-grad-canvas{
  position: relative;
  width: 100%;
  min-height: clamp(220px, 26vw, 360px);
  border-radius: 14px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-3);
  overflow: hidden;
}

.ub-grad-canvas-inner{
  position:absolute;
  inset:0;
  /* JS sets background-image + optional background-color */
}

/* Subtle checker in light/dark to show transparency if fallback disabled */
.ub-grad-canvas::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(45deg, rgba(0,0,0,.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0,0,0,.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0,0,0,.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0,0,0,.05) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0px;
  opacity: .35;
  pointer-events:none;
}

html.ub-theme-dark .ub-grad-canvas::before{
  opacity: .18;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,.10) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,.10) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,.10) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,.10) 75%);
}

/* Make sure gradient sits above checker */
.ub-grad-canvas-inner{
  z-index: 1;
}

/* ============================== Presets row ============================== */
.ub-preset-row{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-top: 10px;
}
.ub-preset-row .ub-chip{
  min-height: 44px;
  padding: 10px 12px;
}

/* ============================== Stops editor ============================== */
.ub-stops{
  display:flex;
  flex-direction:column;
  gap: 10px;
}

/* Each stop row wrapper */
.ub-stop{
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-2);
  border-radius: 14px;
  padding: 10px;
}

/* Grid within a stop row */
.ub-stop-grid{
  display:grid;
  grid-template-columns: 52px 1fr 110px 120px;
  gap: 10px;
  align-items:center;
}

@media (max-width: 520px){
  .ub-stop-grid{
    grid-template-columns: 52px 1fr;
  }
  .ub-stop-actions{
    grid-column: 1 / -1;
  }
  .ub-stop-pos{
    grid-column: 1 / -1;
  }
}

/* Color input: make it a real 44x44 target */
.ub-stop-colorinput{
  width: 52px;
  min-height: 44px;
  height: 44px;
  padding: 0;
  border-radius: 12px;
  border: 1px solid var(--ub-border);
  background: var(--ub-surface-1);
  cursor: pointer;
}

/* Hex input and pos input get toolkit baseline; add minor alignment tweaks */
.ub-stop-hex input,
.ub-stop-pos input{
  width: 100%;
}

/* Actions */
.ub-stop-actions{
  display:flex;
  justify-content:flex-end;
  gap: 10px;
}

.ub-stop-del{
  min-height: 44px;
  width: 100%;
  justify-content:center;
}

/* Inline stop error keeps layout stable */
.ub-stop-err{
  margin-top: 8px;
  min-height: 16px;
}

/* ============================== Details box formatting ============================== */
.ub-work{
  font-family: var(--ub-mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap:anywhere;
}

/* Details summary: ensure touch target */
.ub-collapsible summary{
  cursor:pointer;
  font-weight: 950;
  min-height: 44px;
  display:flex;
  align-items:center;
}
.ub-collapsible summary:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--ub-focus);
  border-radius: 12px;
}

/* ============================== Right rail helper ============================== */
.ub-btn--block{ width: 100%; }

/* ============================== Small screens polish ============================== */
@media (max-width: 520px){
  .ub-kpi{ min-width: 98px; }
}

/* ============================== Reduced motion respect (tool-only) ============================== */
@media (prefers-reduced-motion: reduce){
  .ub-grad-canvas::before{ transition: none; }
}