/* Draw signature pad — Phase B2 */
.sig-app {
  --sig-ink: #0f172a;
  --sig-line: var(--dica-border, #d0d5dd);
  --sig-soft: var(--dica-surface-soft, #f8fafc);
  margin: 0 0 1.25rem;
}

.sig-pad-wrap {
  position: relative;
  margin-top: 12px;
  border: 1px solid var(--sig-line);
  border-radius: 14px;
  background:
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px) 0 0 / 24px 24px,
    #fff;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.sig-pad-wrap.is-dark-bg {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px) 0 0 / 24px 24px,
    #0f172a;
}

.sig-pad {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  cursor: crosshair;
  touch-action: none;
}

.sig-pad-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  color: #94a3b8;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0.85;
  transition: opacity 0.15s ease;
}

.sig-pad-wrap.is-dirty .sig-pad-hint {
  opacity: 0;
}

.sig-baseline {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 22%;
  border-top: 1px dashed #cbd5e1;
  pointer-events: none;
  opacity: 0.7;
}

.sig-pad-wrap.is-dark-bg .sig-baseline {
  border-top-color: rgba(255, 255, 255, 0.25);
}

.sig-pad-wrap.is-dark-bg .sig-pad-hint {
  color: #94a3b8;
}

.sig-result-card {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--sig-line);
  border-radius: 12px;
  background: var(--sig-soft);
}

.sig-result-card[hidden] {
  display: none !important;
}

.sig-result-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  padding: 12px;
  border-radius: 10px;
  background:
    linear-gradient(45deg, #e2e8f0 25%, transparent 25%),
    linear-gradient(-45deg, #e2e8f0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e2e8f0 75%),
    linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  background-color: #fff;
}

.sig-result-preview img {
  max-width: 100%;
  max-height: 140px;
  height: auto;
}

.sig-color-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.sig-swatch {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--sig-line);
  cursor: pointer;
  padding: 0;
  appearance: none;
  background: #0f172a;
}

.sig-swatch.is-active {
  box-shadow: 0 0 0 2px var(--dica-accent, #fa5b0f);
}

.sig-swatch[data-color="#0f172a"] { background: #0f172a; }
.sig-swatch[data-color="#1d4ed8"] { background: #1d4ed8; }
.sig-swatch[data-color="#b91c1c"] { background: #b91c1c; }
.sig-swatch[data-color="#166534"] { background: #166534; }
.sig-swatch[data-color="#ffffff"] {
  background: #fff;
  box-shadow: 0 0 0 1px #94a3b8;
}

@media (max-width: 640px) {
  .sig-pad-hint {
    font-size: 0.85rem;
    padding: 0 16px;
    text-align: center;
  }
  .sig-app .itool-toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }
  .sig-app .itool-toolbar .itool-btn {
    flex: 1 1 auto;
    min-width: calc(50% - 8px);
  }
}

/* Checkerboard preview stronger on dark mode */
@media (prefers-color-scheme: dark) {
  .sig-result-preview {
    background-color: #1e293b;
  }
}