/* 강좌별 추가 스타일 — lectureBuilder 가 엔진을 갱신해도 이 파일은 덮어쓰지 않습니다. */

/* ── 3D 바둑판 위젯 (js/custom.js · Go3D) ── */
.go3d { margin: 18px 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.go3d-stage { position: relative; width: 100%; aspect-ratio: 4 / 3; max-height: 72vh;
  background: radial-gradient(ellipse at 50% 35%, #fbf7f0 0%, #e9e2d6 60%, #d8cfc0 100%); }
:root[data-theme="dark"] .go3d-stage { background: radial-gradient(ellipse at 50% 35%, #3a352e 0%, #24211d 60%, #171513 100%); }
.go3d-stage canvas { display: block; width: 100%; height: 100%; touch-action: pan-y; cursor: grab; }
.go3d-stage canvas:active { cursor: grabbing; }
.go3d-loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; padding: 20px; text-align: center; color: #6b5a44; font-size: 14px; }
.go3d-loading.err { color: var(--danger); }
.go3d-tip { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); background: rgba(20, 16, 12, .78); color: #fff; padding: 5px 12px; border-radius: 6px; font-size: 13px; pointer-events: none; white-space: nowrap; }
.go3d-bar { display: flex; flex-wrap: wrap; gap: 6px 14px; padding: 8px 10px; border-top: 1px solid var(--line); background: var(--card2); }
.go3d-grp { display: inline-flex; flex-wrap: wrap; gap: 4px; }
.go3d-act { margin-left: auto; }
.go3d-bar .btn.on { background: var(--accent); color: var(--accent-fg); }
.go3d-bar .go3d-choice { min-width: 56px; font-size: 14px; }
.go3d-status { display: flex; gap: 10px; align-items: baseline; padding: 6px 12px; font-size: 14px; min-height: 34px; border-top: 1px solid var(--line); }
.go3d-status .msg { flex: 1; }
.go3d-status .msg.ok { color: var(--ok); font-weight: 600; }
.go3d-status .msg.bad { color: var(--danger); font-weight: 600; }
.go3d-status .pt { color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.go3d-moves { padding: 6px 12px 8px; font-size: 13.5px; border-top: 1px dashed var(--line); line-height: 1.9; }
.go3d-moves .mv { display: inline-block; padding: 0 6px; margin: 0 2px; border-radius: 4px; font-family: var(--mono); font-size: 12.5px; }
.go3d-moves .mv.b { background: #222; color: #fff; }
.go3d-moves .mv.w { background: #fff; color: #222; border: 1px solid #bbb; }
.go3d-grid { margin: 0; padding: 10px 14px; background: var(--code-bg); border-top: 1px solid var(--line); font-family: var(--mono); font-size: 12.5px; line-height: 1.5; overflow-x: auto; }
.go3d-ask { padding: 10px 12px 12px; border-top: 1px solid var(--line); background: var(--card2); font-size: 14.5px; }
.go3d-ask .q { font-weight: 600; margin-bottom: 8px; }
.go3d-ask .ops { display: flex; flex-wrap: wrap; gap: 6px; }
.go3d-ask .ops .btn.right { background: var(--ok); color: #fff; border-color: var(--ok); }
.go3d-ask .ops .btn.wrong { background: var(--danger); color: #fff; border-color: var(--danger); }
.go3d-ask .res { margin-top: 8px; min-height: 1.4em; line-height: 1.6; }
.go3d-ask .res.ok { color: var(--ok); }
.go3d-ask .res.bad { color: var(--danger); }
.go3d-note { padding: 8px 12px; border-top: 1px solid var(--line); background: var(--card2); font-size: 14.5px; line-height: 1.65; }
.go3d-note b { display: inline-block; margin-right: 6px; padding: 0 7px; border-radius: 4px; background: var(--accent); color: var(--accent-fg); font-size: 12.5px; }
.go3d-note strong { color: var(--accent); }
.go3d-note small { color: var(--muted); font-size: 12.5px; }
.go3d-sgf { display: flex; gap: 8px; align-items: flex-start; padding: 8px 12px; border-top: 1px solid var(--line); background: var(--card2); }
.go3d-sgf[hidden] { display: none; }
.go3d-sgf textarea { flex: 1; min-height: 3.6em; resize: vertical; font-family: var(--mono); font-size: 12px; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); color: var(--fg); }