/* =====================================================
   Gallery Window – Exhibition Style (FINAL)
===================================================== */

/* ---------- Base ---------- */

* {
  box-sizing: border-box;
}

:root {
  --theme-color: #c6d4e1;
}

body {
  margin: 0;
  background-color: #0f1114;
  color: #e6e7e9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, "Noto Sans KR", Helvetica, Arial, sans-serif;
  overflow-y: auto;
}

/* ---------- Viewer ---------- */

/* 이미지 주변 미묘한 테마 빛 */
.viewer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at center,
    transparent 60%,
    var(--theme-color) 140%
  );
  opacity: 0.08;
  pointer-events: none;
}

.viewer {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}

.viewer img {
  max-width: 90vw;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;

  opacity: 0;
  filter: brightness(0.75) blur(2px);

  transition:
    opacity 1.2s ease,
    filter 2.0s ease,
    transform 6s ease-out;
}

.viewer img.visible {
  opacity: 1;
  filter: brightness(1) blur(0);
}

/* ---------- Fade ---------- */

/* 
.fade-in { opacity: 1; }
.fade-out { opacity: 0; }
*/


/* ---------- Control Panel ---------- */

.control-panel {
  position: fixed;
  top: 24px;
  left: 24px;
  z-index: 1000;
}

.control-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
}

.control-box {
  margin-top: 12px;
  padding: 18px 20px;
  width: 220px;
  background: rgba(18, 20, 24, 0.95);
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.6;
}

.control-box label {
  display: block;
  margin-bottom: 14px;
  opacity: 0.8;
  cursor: pointer;
}

.control-box input,
.control-box button {
  cursor: pointer;
}

.control-box button {
  margin-top: 10px;
  padding: 6px 10px;
  width: 100%;
  background: none;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 6px;
  color: #e6e7e9;
}

.control-box button:hover {
  background: rgba(255,255,255,0.08);
}

/* ---------- Caption ---------- */

.caption {
  position: fixed;
  bottom: 64px; /* 방명록과 겹치지 않도록 */
  left: 50%;
  transform: translateX(-50%);
  font-size: 13px;
  opacity: 0.6;
  letter-spacing: 0.02em;
  text-align: center;
}

/* ---------- Mobile ---------- */

@media (max-width: 768px) {
  .viewer img {
    max-width: 94vw;
    max-height: 86vh;
  }

  .control-panel {
    top: 16px;
    left: 16px;
  }

  .control-box {
    width: 200px;
    font-size: 12px;
  }

  .caption {
    bottom: 56px;
    font-size: 12px;
  }
}

/* =====================================================
   Exhibition Guestbook – FINAL (B안 연출형)
===================================================== */

.exhibition-guestbook {
  position: fixed;
  bottom: -12px;   /* 기존 12px → 위로 올림 */
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  max-width: 800px;

  background: rgba(0, 0, 0, 0.55);
  padding: 12px 16px;
  border-radius: 8px;

  box-sizing: border-box;
  z-index: 1000;

  opacity: 0.35;
  transition: opacity 0.6s ease;
}

/* 마우스 접근 또는 입력 중일 때 */
.exhibition-guestbook:hover,
.exhibition-guestbook:focus-within {
  opacity: 1;
}

/* 방명록 리스트 기본 상태: 숨김 */
.exhibition-guestbook ul {
  margin: 6px 0 8px 0;
  padding: 0;
  list-style: none;

  opacity: 0;
  max-height: 0;
  overflow: hidden;

  transition: opacity 0.6s ease, max-height 0.6s ease;
}

/* 열림 상태 */
.exhibition-guestbook:hover ul,
.exhibition-guestbook:focus-within ul {
  opacity: 1;
  max-height: 200px;
}

/* 방명록 문장 – 정확히 3줄 */
.exhibition-guestbook ul li {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;

  overflow: hidden;
  text-overflow: ellipsis;

  line-height: 22px;
  max-height: 66px; /* 22px × 3 */
}

/* 라벨 */
.guestbook-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  opacity: 0.6;
  white-space: nowrap;
}

/* 입력 영역 */
#guestbook-form {
  display: flex;
  gap: 10px;
}

#guestbook-input {
  flex: 1;
  padding: 8px 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 8px;
  color: #e6e7e9;
  font-size: 14px;
}

#guestbook-form button {
  padding: 8px 14px;
  background: none;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 8px;
  color: #e6e7e9;
  font-size: 13px;
}

#guestbook-form button:hover {
  background: rgba(255,255,255,0.08);
}

/* =========================
   Back to Home – Exhibition
   ========================= */

.back-home-exhibition {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);

  font-size: 13px;
  color: #eee;
  text-decoration: none;

  padding: 6px 10px;
  border-left: 2px solid rgba(255,255,255,0.6);

  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(2px);

  z-index: 9999; /* 슬라이드 위 */
}

.back-home-exhibition:hover {
  color: #fff;
  border-color: #fff;
}

/* =========================
   Mobile 대응 (권장)
   ========================= */
@media (max-width: 768px) {
  .back-home-exhibition {
    display: none;
  }
}

/* =========================
   Audio Hint (Near Settings)
   ========================= */

.audio-hint {
  position: fixed;
  top: 72px;        /* ← 위치 여기서만 조절 */
  left: 20px;

  font-size: 12px;
  line-height: 1.5;
  color: rgba(255,255,255,0.75);

  background: rgba(0,0,0,0.4);
  padding: 6px 10px;
  border-radius: 4px;

  text-shadow: 0 0 6px rgba(0,0,0,0.6);

  pointer-events: none;   /* 클릭 방해 방지 */
  z-index: 900;           /* control-box보다 아래 */
}

/* 모바일에서는 숨김 */
@media (max-width: 768px) {
  .audio-hint {
    display: none;
  }
}

figure.exhibition-poster {
  margin: 0;
}

figure.exhibition-poster {
  width: 100%;
}

figure.exhibition-poster {
  width: 100%;
  margin: 0;
}

figure.exhibition-poster {
  margin: 0;
  margin-inline: 0;
}

figure.exhibition-poster {
  margin: 0;
  margin-inline-start: 0;
  margin-inline-end: 0;
}

/* 상세페이지에서는 스크롤 허용 */
body.exhibition-detail {
  overflow-y: auto !important;
  overflow-x: hidden;
}

/* ================================
   상세페이지 전용 강제 규칙
   (viewer 영향 완전 차단)
================================ */

/* 포스터 이미지 크기 정상화 */
body.exhibition-detail figure.exhibition-poster img {
  max-width: 100% !important;
  height: auto !important;
  width: auto !important;
  object-fit: contain;
  display: block;
}

/* 정보 텍스트 span 줄 단위 강제 */
body.exhibition-detail .exhibition-text span {
  display: block !important;
  line-height: 1.25 !important;
  margin-bottom: 1px !important;
}

/* 입력창을 이미지 밖으로 이동 */
.exhibition-guestbook form {
  position: relative;   /* stacking 안정 */
  z-index: 1;

  display: flex;
  align-items: center;  /* 세로 정렬 안정 */
  gap: 8px;             /* 살짝 줄임 */
}

.exhibition-guestbook input[type="text"] {
  flex: 1;
  max-width: 70%;
  padding: 5px 8px;
  font-size: 13px;
}

.exhibition-guestbook button {
  padding: 5px 9px;
  font-size: 12px;
}

/* 타이틀 항상 앞으로 */
.exhibition-guestbook h3 {
  color: var(--theme-color);
  position: relative;
  z-index: 10;
  font-size: 13px;
  margin-bottom: 6px;
  letter-spacing: 0.03em;
  opacity: 0.85;
}

.exhibition-guestbook ul li {
  opacity: 0;
  transform: translateY(6px);
  animation: guestFadeIn 0.4s ease forwards;
}

@keyframes guestFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.exhibition-guestbook input[type="text"] {
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

.exhibition-guestbook input[type="text"]:focus {
  outline: none;
  border: 1px solid var(--theme-color);
  box-shadow: 0 0 0 2px var(--theme-color);
}

.exhibition-guestbook button {
  padding: 5px 9px;
  font-size: 12px;

  background: transparent;
  border: 1px solid var(--theme-color);
  color: var(--theme-color);

  transition: all 0.2s ease;
}

.exhibition-guestbook button:hover {
  background: var(--theme-color);
  color: #0f1114;   /* 어두운 배경 기준 */
  box-shadow: 0 0 12px var(--theme-color);
}

.exhibition-guestbook button:active {
  transform: scale(0.96);
}

/* 새 글 강조 */
.highlight-new {
  animation: highlightFade 1s ease forwards;
}

@keyframes highlightFade {
  0% {
    color: var(--theme-color);
    text-shadow: 0 0 8px var(--theme-color);
  }
  100% {
    color: #e6e7e9;
    text-shadow: none;
  }
}

/* 전체 살짝 흔들림 */
.guestbook-shake {
  animation: subtleShake 0.25s ease;
}

@keyframes subtleShake {
  0%   { transform: translateY(0); }
  50%  { transform: translateY(-1px); }
  100% { transform: translateY(0); }
}

@keyframes themeFadeInOut {
  0%   { opacity: 0.18; }
  100% { opacity: 0; }
}

.fade-img {
  opacity: 0;
  transition: opacity 1.6s ease-in-out;
}

.fade-img.visible {
  opacity: 1;
}

/* 🔥 마지막 → 첫 이미지 전용 */
.loop-transition {
  transition: opacity 2.2s ease-in-out;
}

.exhibition-guestbook.flash {
  box-shadow: 0 0 20px rgba(255,255,255,0.2);
  transition: box-shadow 0.4s ease;
}

.viewer.loop-dark {
  background:#000;
  transition: background 0.9s ease;
}

.exhibition-guestbook.flash {
  box-shadow:
    0 0 25px rgba(255,255,255,0.25),
    0 0 60px rgba(255,255,255,0.15);
  transform: translateX(-50%) scale(1.02);
}

/* 처음에는 이미지 보이지 않음 */
.viewer img {
  opacity: 0;
  transition: opacity 1.2s ease;
}