/* ============================================================
   classroom/css/blocks.css — rundown block styling (Phase 2)

   Loaded by the block preview harness now, and by Prep/Class mode
   (Phase 3). Reuses the classroom palette from classroom.css.
   ============================================================ */

.pcb-block { background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
  margin: 0 0 18px; overflow: hidden; }

/* header + type badge */
.pcb-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
  padding: 12px 18px; border-bottom: 1px solid var(--line); background: var(--indigo-wash); }
.pcb-badge { font-size: 13px; font-weight: 800; letter-spacing: .02em;
  padding: 3px 10px; border-radius: 99px; background: var(--indigo); color: #fff; white-space: nowrap; }
.pcb-head.pcb-teach   .pcb-badge { background: #6D4AA6; }
.pcb-head.pcb-game    .pcb-badge { background: #C0432B; }
.pcb-head.pcb-talk    .pcb-badge { background: #1F8A5B; }
.pcb-head.pcb-paper   .pcb-badge { background: #4353A8; }
.pcb-head.pcb-wrap    .pcb-badge { background: var(--amber); color: #4A340B; }
.pcb-head.pcb-break   .pcb-badge { background: var(--ink-soft); }
.pcb-head.pcb-warmup  .pcb-badge { background: #2E9E6B; }
.pcb-title { font-size: 18px; font-weight: 800; color: var(--ink); }
.pcb-meta  { margin-left: auto; font-size: 13px; color: var(--ink-soft); font-weight: 600; }
.pcb-body  { padding: 16px 18px; }
.pcb-activity { margin: 0 0 12px; }

.pcb-error { background: var(--warn-tint); border: 1.5px solid var(--warn);
  color: #7A2A22; border-radius: 10px; padding: 10px 14px; font-weight: 700; font-size: 14px; margin: 8px 0; }

/* teacher-only stage direction */
.pcb-cue { margin-top: 10px; background: var(--amber-tint); border: 1px dashed #E0C083;
  color: #5C4A21; border-radius: 8px; padding: 8px 12px; font-size: 13.5px; font-weight: 600; }

/* ── teach slides ── */
.pcb-slides { display: grid; gap: 12px; }
.pcb-slide { position: relative; border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 20px; background: #fff; }
.pcb-slide-n { position: absolute; top: 8px; right: 12px; font-size: 12px; font-weight: 800; color: var(--ink-soft); }
.pcb-big { font-size: clamp(24px, 4vw, 34px); font-weight: 800; color: var(--indigo-deep); line-height: 1.25; }
.pcb-e { font-size: 1.1em; }
.pcb-img { display: block; max-width: 100%; max-height: 320px; border-radius: 10px; margin: 0 0 10px; }
.pcb-board { min-height: 120px; border: 2px dashed var(--line-strong); border-radius: 10px;
  display: grid; place-items: center; color: var(--ink-soft); font-weight: 700; background: repeating-linear-gradient(45deg,#fff,#fff 12px,#FCFCFE 12px,#FCFCFE 24px); }
.pcb-board-label { font-size: 22px; color: var(--ink); }
.pcb-anchor { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 12px; font-size: 14px; color: var(--ink-mid); font-weight: 700; }
.pcb-anchor span:not(:first-child)::before { content: "·"; margin-right: 8px; color: var(--line-strong); font-weight: 400; }
.pcb-prompt { margin-top: 12px; background: var(--indigo-tint); border-radius: 10px; padding: 10px 14px; font-size: 16px; }
.pcb-prompt-lbl { font-weight: 800; color: var(--indigo-dark); margin-right: 4px; }
.pcb-prompt-chat { color: var(--ink-soft); font-weight: 600; }
.pcb-prompt-in { min-height: 38px; border: 2px solid var(--line-strong); border-radius: 8px; font-size: 16px; padding: 4px 10px; margin: 0 6px; }
.pcb-prompt-check { min-height: 38px; border: none; border-radius: 99px; background: var(--indigo); color: #fff; font-weight: 700; padding: 4px 16px; cursor: pointer; }
.pcb-prompt-fb.ok { color: var(--ok); font-weight: 800; margin-left: 6px; }
.pcb-prompt-fb.no { color: var(--warn); font-weight: 800; margin-left: 6px; }

/* audio button */
.pcb-say { -webkit-appearance: none; appearance: none; cursor: pointer;
  width: 40px; height: 40px; border-radius: 50%; border: 1.5px solid var(--indigo-soft);
  background: var(--indigo-tint); color: var(--indigo-dark); font-size: 17px;
  vertical-align: middle; display: inline-grid; place-items: center; }
.pcb-say:active { transform: scale(.92); }

/* talk */
.pcb-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.pcb-chips span { background: var(--indigo-wash); border: 1px solid var(--line); border-radius: 99px; padding: 3px 12px; font-size: 13px; font-weight: 700; color: var(--ink-mid); }
.pcb-task { font-size: 20px; font-weight: 700; color: var(--ink); margin: 0 0 10px; }
.pcb-models { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.pcb-models li { font-size: 18px; font-weight: 700; color: var(--indigo-deep); }

/* paper / handoff / wrap */
.pcb-handoff { display: flex; gap: 14px; align-items: flex-start; background: var(--indigo-wash);
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.pcb-handoff-ico { font-size: 34px; }
.pcb-handoff-body h3 { margin: 0 0 3px; font-size: 18px; }
.pcb-handoff-body p { margin: 0 0 8px; font-size: 15px; color: var(--ink-mid); }
.pcb-linkrow { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pcb-url { background: #fff; border: 1px solid var(--line-strong); border-radius: 6px; padding: 3px 8px; font-size: 13px; color: var(--ink-mid); }
.pcb-copy { -webkit-appearance: none; appearance: none; cursor: pointer; border: 1.5px solid var(--indigo-soft);
  background: var(--paper); color: var(--indigo); border-radius: 99px; font-weight: 700; font-size: 13px; padding: 5px 14px; }
.pcb-copy:active { transform: scale(.96); }
.pcb-strip { margin-top: 12px; background: var(--amber-tint); border: 1px solid #F2DCB4; border-radius: 10px;
  padding: 8px 14px; font-size: 14px; color: #6B4E1B; }
.pcb-body > .pcb-wrap { display: grid; gap: 10px; }
.pcb-reveal { background: var(--amber-tint); border: 1px solid #F2DCB4; border-radius: 12px; padding: 12px 16px; font-size: 16px; }
.pcb-reveal p { margin: 4px 0 8px; font-size: 14.5px; color: var(--ink-mid); }
.pcb-hw, .pcb-mission { background: var(--indigo-wash); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; font-size: 15px; color: var(--ink-mid); }

/* break */
.pcb-body > .pcb-break { display: flex; gap: 14px; align-items: center; background: var(--page); border: 1px dashed var(--line-strong); border-radius: 12px; padding: 16px 18px; }
.pcb-break-ico { font-size: 34px; }
.pcb-break h3 { margin: 0; font-size: 18px; }
.pcb-break p { margin: 2px 0 0; color: var(--ink-mid); }

/* TRANSITIONAL embed — remove when library exercises become shared renderers */
.pcb-embed { border: 1.5px dashed var(--amber); border-radius: 12px; overflow: hidden; }
.pcb-embed-tag { background: var(--amber-tint); color: #6B4E1B; font-size: 11px; font-weight: 800;
  letter-spacing: .05em; text-transform: uppercase; padding: 4px 10px; }
.pcb-embed-frame { width: 100%; height: 520px; border: 0; display: block; background: #fff; }