/* ─────────────────────────────────────────────
   2D Art Gallery — UI 레이어 스타일
   3D 캔버스 위에 얹히는 HUD / 패널 / 로더
   ───────────────────────────────────────────── */

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--dfn-bg);
  color: var(--dfn-ink);
  font-family: var(--dfn-font-kr);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

#app, #app canvas {
  position: fixed;
  inset: 0;
}
#app canvas {
  display: block;
  touch-action: none;
  cursor: grab;
}
#app canvas.dragging { cursor: grabbing; }
#app canvas.pickable { cursor: pointer; }

/* ── 상단 HUD ─────────────────────────────── */
.hud { position: fixed; z-index: 20; pointer-events: none; }

.hud-top {
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  padding-top: calc(14px + env(safe-area-inset-top));
}
.hud-wordmark {
  font-family: var(--dfn-font-en);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .28em;
  color: var(--dfn-ink);
  white-space: nowrap;
}
.hud-right {
  margin-left: auto;
  font-family: var(--dfn-font-en);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--dfn-muted);
  text-align: right;
  white-space: nowrap;
}

/* ── 조작 힌트 ────────────────────────────── */
.hud-hint {
  left: 50%;
  bottom: calc(84px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--dfn-line);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--dfn-ink);
  white-space: nowrap;
  transition: opacity 1.2s ease;
  max-width: calc(100vw - 32px);
  overflow: hidden;
  text-overflow: ellipsis;
}
.hud-hint.dim { opacity: 0; }
.hud-hint b { color: var(--dfn-red); font-weight: 700; }

/* ── 모바일 이동 스틱 ─────────────────────── */
#stick {
  position: fixed;
  left: 22px;
  bottom: calc(24px + env(safe-area-inset-bottom));
  width: 116px; height: 116px;
  border-radius: 50%;
  border: 1.5px solid rgba(16, 16, 16, .22);
  background: rgba(255, 255, 255, .42);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  display: none;
  touch-action: none;
  z-index: 30;
}
#stickThumb {
  position: absolute;
  left: 50%; top: 50%;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--dfn-ink);
  transform: translate(-50%, -50%);
  box-shadow: 0 4px 14px rgba(16, 16, 16, .3);
}
#stick::after {
  content: "MOVE";
  position: absolute;
  left: 50%; top: -20px;
  transform: translateX(-50%);
  font-family: var(--dfn-font-en);
  font-size: 9px;
  letter-spacing: .3em;
  color: var(--dfn-muted);
}
@media (pointer: coarse) { #stick { display: block; } }
body.vr #stick, body.panel-open #stick { display: none; }

/* ── VR 버튼 (VRButton.js 인라인 스타일 오버라이드) ── */
#VRButton, .dfn-vr {
  font-family: var(--dfn-font-en) !important;
  font-weight: 600 !important;
  font-size: 11px !important;
  letter-spacing: .24em !important;
  background: var(--dfn-ink) !important;
  color: var(--dfn-bg) !important;
  border: 1px solid var(--dfn-ink) !important;
  border-radius: 999px !important;
  padding: 12px 22px !important;
  width: auto !important;
  left: 50% !important;
  transform: translateX(-50%);
  bottom: calc(18px + env(safe-area-inset-bottom)) !important;
  opacity: .92 !important;
  text-decoration: none !important;
}
#vrCaption {
  position: fixed;
  left: 50%;
  bottom: calc(56px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 19;
  margin: 0;
  font-size: 11px;
  color: var(--dfn-muted);
  letter-spacing: -0.01em;
  pointer-events: none;
  white-space: nowrap;
}
body.vr .hud, body.vr #vrCaption { display: none; }
body.panel-open .dfn-vr, body.panel-open #vrCaption { visibility: hidden; }

/* ── 뉴스 상세 패널 ───────────────────────── */
#panel {
  position: fixed;
  left: 50%;
  bottom: 0;
  z-index: 40;
  width: min(720px, 100vw);
  transform: translate(-50%, 108%);
  background: var(--dfn-paper);
  border: 1px solid var(--dfn-line);
  border-bottom: none;
  border-radius: 18px 18px 0 0;
  padding: 20px 26px calc(20px + env(safe-area-inset-bottom));
  box-shadow: 0 -18px 60px rgba(16, 16, 16, .16);
  transition: transform .5s cubic-bezier(.22, .9, .26, 1);
}
#panel.open { transform: translate(-50%, 0); }
#panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--dfn-red);
  border-radius: 18px 18px 0 0;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}
.panel-kicker {
  font-family: var(--dfn-font-en);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--dfn-red);
}
#panelClose {
  appearance: none;
  border: 1px solid var(--dfn-line);
  background: transparent;
  color: var(--dfn-ink);
  font-family: var(--dfn-font-kr);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
}
#panelClose:hover { background: var(--dfn-ink); color: var(--dfn-bg); }

#panelTitle {
  margin: 0 0 10px;
  font-size: clamp(19px, 4.6vw, 26px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  word-break: keep-all;
}

.panel-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.panel-meta .chip {
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  padding: 4px 10px;
  border: 1px solid var(--dfn-line);
  color: var(--dfn-muted);
  background: var(--dfn-bg);
}
.panel-meta .chip.ink { background: var(--dfn-ink); color: var(--dfn-bg); border-color: var(--dfn-ink); }
.panel-meta .chip.red {
  background: transparent;
  color: var(--dfn-red);
  border-color: var(--dfn-red);
  font-family: var(--dfn-font-en);
  letter-spacing: .14em;
  font-size: 10px;
}
.panel-meta .chip.yellow { background: var(--dfn-yellow); color: var(--dfn-ink); border-color: var(--dfn-yellow); }

.panel-body {
  font-size: 14.5px;
  line-height: 1.72;
  color: #333029;
  white-space: pre-line;
  word-break: keep-all;
  max-height: min(34vh, 300px);
  overflow-y: auto;
  padding-right: 6px;
  overscroll-behavior: contain;
}

.panel-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}
#panelLink {
  font-weight: 700;
  font-size: 13px;
  color: var(--dfn-bg);
  background: var(--dfn-red);
  text-decoration: none;
  border-radius: 999px;
  padding: 9px 18px;
}
#panelLink:hover { background: var(--dfn-ink); }
#panelLink[hidden] { display: none; }
.panel-brand {
  font-family: var(--dfn-font-en);
  font-weight: 500;
  font-size: 9px;
  letter-spacing: .3em;
  color: var(--dfn-muted);
}

/* ── 로딩 오버레이 ────────────────────────── */
#loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background: var(--dfn-bg);
  transition: opacity 2s ease;
}
#loader.done { opacity: 0; pointer-events: none; }
.loader-word {
  font-family: var(--dfn-font-en);
  font-weight: 700;
  font-size: clamp(20px, 5vw, 30px);
  letter-spacing: .14em;
  color: var(--dfn-ink);
}
#loader .spin {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid var(--dfn-line);
  border-top-color: var(--dfn-red);
  animation: gallery-spin .9s linear infinite;
}
@keyframes gallery-spin { to { transform: rotate(360deg); } }
.loader-kr {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.loader-en {
  margin: -10px 0 0;
  font-family: var(--dfn-font-en);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: .34em;
  color: var(--dfn-muted);
}

/* ── 폴백 화면 ────────────────────────────── */
#fallback {
  position: fixed;
  inset: 0;
  z-index: 110;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  background: var(--dfn-bg);
  text-align: center;
  padding: 24px;
}
.fallback-word {
  font-family: var(--dfn-font-en);
  font-weight: 700;
  font-size: clamp(18px, 4.5vw, 26px);
  letter-spacing: .14em;
  color: var(--dfn-ink);
  margin-bottom: 10px;
}
#fallback h1 {
  margin: 0;
  font-size: clamp(18px, 4.5vw, 26px);
  font-weight: 800;
  letter-spacing: -0.02em;
  word-break: keep-all;
}
#fallback p {
  margin: 0;
  font-size: 14px;
  color: var(--dfn-muted);
  word-break: keep-all;
  line-height: 1.6;
}

/* ── 모바일 미세 조정 ─────────────────────── */
@media (max-width: 560px) {
  .hud-right { display: none; }
  .hud-hint { bottom: calc(150px + env(safe-area-inset-bottom)); font-size: 11.5px; }
  #panel { padding: 18px 18px calc(18px + env(safe-area-inset-bottom)); }
  #vrCaption { display: none; }
}