/* ===========================================================================
 * mc-grid.css — McItem grid-in input mode visual.
 * ===========================================================================
 * Applies when McItem is mounted with features.format === 'grid'. Renders a
 * numeric/free-text input + a Submit button instead of choice rows. Same
 * stem/figure/hint/why chrome as MC mode; only the input area differs.
 *
 * Shared rules (not surface-scoped); see migration-defaults.md "Components
 * ship their own structural CSS" principle.
 * ========================================================================= */

.mc-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 8px 0 14px;
}

.mc-grid-input {
  width: 100%;
  padding: 16px 18px;
  font-family: ui-serif, Georgia, serif;
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  border: 2px solid var(--ink-30, rgba(0, 0, 0, 0.16));
  border-radius: var(--radius, 14px);
  background: var(--bg-elevated, var(--surface, #fff));
  color: var(--ink, #18130E);
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.15s;
}
.mc-grid-input:focus-visible {
  border-color: var(--accent-coral);
  outline: 2px solid var(--accent-coral);
  outline-offset: 2px;
}
.mc-grid-input.is-correct {
  border-color: var(--accent-sage, #5B7A4A);
  color: var(--accent-sage-ink, var(--ink));
  background: var(--accent-sage-tint, rgba(91, 122, 74, 0.08));
}
.mc-grid-input.is-wrong {
  border-color: var(--accent-coral, #C96F4A);
  color: var(--accent-coral-ink, var(--ink));
  background: var(--accent-coral-tint, rgba(201, 111, 74, 0.08));
}
.mc-grid-input:disabled {
  cursor: default;
}

.mc-grid-submit {
  align-self: stretch;
  padding: 12px 18px;
  font-family: var(--font-ui, inherit);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--accent-coral, #C96F4A);
  border: none;
  border-radius: var(--radius, 14px);
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.mc-grid-submit:hover:not(:disabled) { opacity: 0.92; }
.mc-grid-submit:disabled {
  background: var(--ink-10, rgba(0, 0, 0, 0.08));
  color: var(--ink-30, rgba(0, 0, 0, 0.3));
  cursor: default;
}
.mc-grid-submit:focus-visible {
  outline: 2px solid var(--accent-coral);
  outline-offset: 2px;
}

/* Reveal-block scoping (when the why-panel is preceded by an expected-value
 * line for grid wrong answers). The why block becomes a card. */
.mc-why-block {
  margin-top: 14px;
  padding: 14px;
  border-radius: var(--radius, 14px);
  border: 1px solid var(--ink-10, rgba(0, 0, 0, 0.08));
  background: var(--bg-muted, var(--surface));
}
.mc-why-block.is-correct {
  background: var(--accent-sage-tint, rgba(91, 122, 74, 0.10));
  border-color: var(--accent-sage, #5B7A4A);
}
.mc-why-block.is-wrong {
  background: var(--bg-muted, var(--surface));
  border-color: var(--ink-30, rgba(0, 0, 0, 0.16));
}

.mc-grid-expected {
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink, #18130E);
  margin-bottom: 6px;
}
.mc-grid-expected b {
  color: var(--accent-coral, #C96F4A);
  font-weight: 700;
}