/*
 * classroom.css — Git Science Park v2.0 공유 UI 크롬 (Zero-Dependency)
 * ------------------------------------------------------------------
 * 상단 언어/교실 모드 바, 언어 드롭다운, 교실 모드(발표·워크시트·플레이리스트·교사 가이드).
 * 허브(다크 테마)와 실험 페이지(라이트 테마) 양쪽에서 동작하도록
 * 색은 가능한 한 currentColor / 중립 반투명 / 테마 변수 폴백 체인을 쓴다.
 */

/* ===== 상단 바 (언어 + 교실 모드) ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 0.85rem;
  background: rgba(127, 127, 127, 0.10);
  border-bottom: 1px solid rgba(127, 127, 127, 0.18);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
[dir="rtl"] .topbar { justify-content: flex-start; }

.lang-switcher,
.topbar-btn {
  font: inherit;
  color: inherit;
  background: rgba(127, 127, 127, 0.12);
  border: 1px solid rgba(127, 127, 127, 0.38);
  border-radius: 8px;
  padding: 5px 10px;
  line-height: 1.2;
  cursor: pointer;
}
/* 언어 드롭다운: 닫힌 컨트롤과 펼친 옵션 목록 모두 테마(다크 허브/라이트 실험)에
   맞춰 불투명 배경 + 대비되는 글자색을 명시한다. (기존엔 옵션 팝업이 흰 배경 +
   흰 글자로 보이지 않던 문제 수정) */
.lang-switcher {
  padding-inline-end: 22px;
  background-color: var(--bg-card, var(--card-bg, #ffffff));
  color: var(--text, #1a1a1a);
}
.lang-switcher option {
  background-color: var(--bg-card, var(--card-bg, #ffffff));
  color: var(--text, #1a1a1a);
}
.topbar-btn:hover,
.lang-switcher:hover { border-color: currentColor; }
.topbar-btn:focus-visible,
.lang-switcher:focus-visible {
  outline: 3px solid var(--accent, var(--primary, #5b9dff));
  outline-offset: 2px;
}
.topbar-btn[aria-pressed="true"] {
  background: var(--accent, var(--primary, #5b9dff));
  color: #fff;
  border-color: transparent;
}

/* ===== 교실 액션 바 (실험 페이지) ===== */
.gsp-cbar {
  position: sticky;
  top: 38px;
  z-index: 55;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(127, 127, 127, 0.08);
  border-bottom: 1px solid rgba(127, 127, 127, 0.16);
}
.gsp-cbar[hidden] { display: none; }
.gsp-cbar button {
  font: inherit;
  color: inherit;
  background: rgba(127, 127, 127, 0.12);
  border: 1px solid rgba(127, 127, 127, 0.38);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
}
.gsp-cbar button:hover { border-color: currentColor; }
.gsp-cbar button[aria-pressed="true"] {
  background: var(--accent, var(--primary, #5b9dff));
  color: #fff;
  border-color: transparent;
}

/* ===== 발표 / 집중 모드 ===== */
body.gsp-present nav,
body.gsp-present footer,
body.gsp-present .exp-related,
body.gsp-present .topbar,
body.gsp-present .gsp-cbar { display: none !important; }
body.gsp-present main,
body.gsp-present .tabs,
body.gsp-present header { max-width: 1100px; }
.gsp-present-exit {
  position: fixed;
  top: 14px;
  inset-inline-end: 14px;
  z-index: 9999;
  font: inherit;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid currentColor;
  background: rgba(127, 127, 127, 0.18);
  color: inherit;
  cursor: pointer;
}

/* ===== 모달 / 패널 공통 ===== */
.gsp-scrim {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 5vh 16px;
  background: rgba(0, 0, 0, 0.55);
  overflow: auto;
}
.gsp-dialog {
  width: 100%;
  max-width: 760px;
  background: var(--bg-card, var(--card-bg, #ffffff));
  color: var(--text, #1a1a1a);
  border: 1px solid rgba(127, 127, 127, 0.25);
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}
.gsp-dialog__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(127, 127, 127, 0.2);
}
.gsp-dialog__title { font-size: 1.15rem; font-weight: 700; margin: 0; }
.gsp-dialog__close {
  margin-inline-start: auto;
  font: inherit;
  font-size: 1.2rem;
  line-height: 1;
  background: transparent;
  border: 0;
  color: inherit;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: 8px;
}
.gsp-dialog__close:hover { background: rgba(127, 127, 127, 0.15); }
.gsp-dialog__body { padding: 18px 20px; }
.gsp-section + .gsp-section { margin-top: 22px; }
.gsp-section__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--accent, var(--primary, #5b9dff));
}
.gsp-muted { color: var(--text-muted, #6b7280); font-size: 0.9rem; }

/* ===== 플레이리스트 ===== */
.gsp-course-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.gsp-course-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid rgba(127, 127, 127, 0.22);
  border-radius: 10px;
}
.gsp-course-item .idx {
  flex: none;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--accent-soft, rgba(91, 157, 255, 0.16));
  color: var(--accent, var(--primary, #5b9dff));
  font-weight: 700; font-size: 0.85rem;
}
.gsp-course-item .ci-title { flex: 1; min-width: 0; }
.gsp-course-item .ci-title b { display: block; font-size: 0.95rem; }
.gsp-course-item .ci-title small { color: var(--text-muted, #6b7280); }
.gsp-iconbtn {
  font: inherit; cursor: pointer;
  background: transparent; color: inherit;
  border: 1px solid rgba(127, 127, 127, 0.3);
  border-radius: 8px; padding: 4px 8px;
}
.gsp-iconbtn:hover { border-color: currentColor; }
.gsp-btn {
  font: inherit; cursor: pointer;
  border: 0; border-radius: 10px;
  padding: 10px 16px; font-weight: 700;
  background: var(--accent, var(--primary, #5b9dff)); color: #fff;
}
.gsp-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.gsp-btn--ghost {
  background: transparent; color: inherit;
  border: 1px solid rgba(127, 127, 127, 0.4);
}
.gsp-actions { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }

/* ===== 교사 가이드 표 ===== */
.gsp-guide-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.gsp-guide-table th, .gsp-guide-table td {
  text-align: start; padding: 8px 10px;
  border-bottom: 1px solid rgba(127, 127, 127, 0.16);
  vertical-align: top;
}
.gsp-guide-table th { color: var(--text-muted, #6b7280); font-weight: 600; }
.gsp-guide-table .add-btn { white-space: nowrap; }

/* 실험 페이지 교사 가이드 슬라이드 패널 */
.gsp-guide-panel {
  position: fixed;
  top: 0; inset-inline-end: 0;
  z-index: 210;
  width: min(380px, 92vw);
  height: 100%;
  overflow: auto;
  padding: 20px;
  background: var(--bg-card, var(--card-bg, #ffffff));
  color: var(--text, #1a1a1a);
  border-inline-start: 1px solid rgba(127, 127, 127, 0.25);
  box-shadow: -16px 0 40px rgba(0, 0, 0, 0.3);
}
.gsp-guide-panel h3 { margin: 0 0 10px; color: var(--accent, var(--primary, #5b9dff)); }
.gsp-guide-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; font-size: 0.9rem; }
.gsp-guide-meta span {
  padding: 4px 10px; border-radius: 999px;
  background: rgba(127, 127, 127, 0.12);
}
.gsp-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.gsp-chips span {
  padding: 4px 10px; border-radius: 999px; font-size: 0.82rem;
  border: 1px solid rgba(127, 127, 127, 0.3);
}

/* ===== 워크시트 ===== */
.gsp-ws-toolbar {
  position: sticky; top: 0;
  display: flex; gap: 10px; justify-content: flex-end;
  padding: 10px 0 14px;
}
.gsp-ws-sheet {
  background: #ffffff; color: #111;
  border-radius: 12px;
  padding: 28px 30px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}
.gsp-ws-sheet h2 { font-size: 1.3rem; margin: 0 0 4px; }
.gsp-ws-sheet .ws-sub { color: #555; margin: 0 0 16px; font-size: 0.92rem; }
.gsp-ws-fields { display: flex; gap: 18px; margin: 14px 0 20px; font-size: 0.9rem; }
.gsp-ws-fields .fld { flex: 1; border-bottom: 1px solid #999; padding-bottom: 4px; }
.gsp-ws-block { margin: 16px 0; }
.gsp-ws-block h3 { font-size: 1rem; margin: 0 0 6px; color: #1a1a1a; }
.gsp-ws-lines { border: 1px solid #ccc; border-radius: 8px; min-height: 88px;
  background-image: repeating-linear-gradient(transparent, transparent 27px, #e3e3e3 28px); }

@media print {
  body.gsp-printing * { visibility: hidden !important; }
  body.gsp-printing .gsp-ws-sheet,
  body.gsp-printing .gsp-ws-sheet * { visibility: visible !important; }
  body.gsp-printing .gsp-ws-sheet {
    position: absolute; left: 0; top: 0; width: 100%;
    box-shadow: none; border-radius: 0; padding: 0;
  }
  body.gsp-printing .gsp-ws-toolbar { display: none !important; }
}

/* 모션 최소화 선호 존중 */
@media (prefers-reduced-motion: reduce) {
  .gsp-scrim, .gsp-guide-panel, .gsp-dialog { animation: none !important; transition: none !important; }
}

/* ================================================================
 * v2.0-B 접근성 · 성능
 * classroom.css 는 허브와 53개 실험 페이지 모두에 링크되므로
 * 여기 둔 전역 규칙은 사이트 전체에 적용된다.
 * ================================================================ */

/* 전역 prefers-reduced-motion (실험 페이지엔 자체 처리가 없었음) */
@media (prefers-reduced-motion: reduce) {
  html:not(.gsp-motion-ok) *,
  html:not(.gsp-motion-ok) *::before,
  html:not(.gsp-motion-ok) *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* 색약(color-blind) 보조 모드: 색 외 단서를 강화한다.
   허브 카테고리 색은 JS가 Okabe-Ito 팔레트로 교체하고,
   여기서는 테두리·아웃라인 등 형태 단서를 더한다. */
html.gsp-cb .chip[aria-pressed="true"] { outline: 2px solid currentColor; outline-offset: 1px; }
html.gsp-cb .badge { border: 1px solid rgba(127, 127, 127, 0.55); }
html.gsp-cb .card.is-ready { border-inline-start: 3px solid currentColor; }
html.gsp-cb .topbar-btn[aria-pressed="true"] { outline: 2px solid #fff; outline-offset: -3px; }