/* ===========================
   CSS Variables
   =========================== */
:root {
  --color-primary: #5FCFC3;
  --color-primary-light: #7EDDD3;
  --color-secondary: #FFD700;
  --color-accent: #FF8C00;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E8E8E8;
  --font-family-body: "DFKai-SB", "BiauKai", "標楷體", serif;
  --font-scale: 1;
  --mode-scale: 1.6;  /* 直式 +60% */
  --left-panel-width: 100px;
}

body.horizontal-mode {
  --mode-scale: 0.8;  /* 橫式 -20% */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

body {
  font-family: var(--font-family-body);
  color: var(--color-text-primary);
  background: #1a1a2e;
}

/* ===========================
   主要 Flex 布局
   =========================== */
.app-layout {
  display: flex;
  width: 100vw;
  height: 100vh;
  background-image: url('../theme/default/background.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

/* ===========================
   左側面板（漢堡 + 頁碼）
   =========================== */
.left-panel {
  width: var(--left-panel-width);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0;
}

.hamburger-btn {
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 0;
  margin-bottom: 30px;
}

.hamburger-btn:hover {
  background: rgba(0, 0, 0, 0.7);
}

.hamburger-btn.active {
  z-index: 10001;
}

.hamburger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-btn.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger-btn.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Refresh / sync button — mirrors hamburger-btn visual treatment. Re-runs
 * loadDocument on the original src so Google Docs URLs re-sync from upstream. */
.refresh-btn {
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-bottom: 30px;
  transition: background 0.15s;
}

.refresh-btn:hover {
  background: rgba(0, 0, 0, 0.7);
}

.refresh-btn.refreshing {
  pointer-events: none;
  opacity: 0.6;
}

.refresh-btn.refreshing svg {
  animation: refresh-spin 1s linear infinite;
}

@keyframes refresh-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.page-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 16px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.page-indicator .current {
  font-size: 42px;
  font-weight: bold;
  color: var(--color-secondary);
  line-height: 1;
}

.page-indicator .separator {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  margin: 6px 0;
  font-weight: normal;
}

.page-indicator .total {
  font-size: 20px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1;
}

/* ===========================
   內容區 - Container Query
   =========================== */
.content-area {
  flex: 1;
  overflow: hidden;
  position: relative;
  /* padding 放在這裡，container 在內層 */
  padding: 60px 80px;
}

.manuscript-container {
  width: 100%;
  height: 100%;
  container-type: size;
  overflow: hidden;
}

.manuscript {
  width: 100cqw;
  height: 100cqh;
  column-width: 100cqw;
  column-gap: 0;
  column-fill: auto;

  /* 預設直書 */
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* 橫書模式 */
body.horizontal-mode .manuscript {
  writing-mode: horizontal-tb;
}

body.horizontal-mode h1,
body.horizontal-mode h2,
body.horizontal-mode h3,
body.horizontal-mode h4,
body.horizontal-mode p,
body.horizontal-mode ul,
body.horizontal-mode ol,
body.horizontal-mode li {
  writing-mode: horizontal-tb;
}

body.horizontal-mode ul,
body.horizontal-mode ol {
  margin: 20px 0;
}

body.horizontal-mode li {
  margin-bottom: 0.5rem;
}

/* ===========================
   標題樣式
   =========================== */
h1, h2, h3, h4 {
  font-family: var(--font-family-body);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.15em;
  line-height: 1.6;
  margin: 0;
  break-after: avoid;
}

h1 {
  font-size: calc(clamp(48px, 8cqi, 100px) * var(--font-scale) * var(--mode-scale));
  color: var(--color-primary);
  font-weight: 700;
  margin-right: 1.5rem;
  break-before: column;
}

h2 {
  font-size: calc(clamp(42px, 7cqi, 90px) * var(--font-scale) * var(--mode-scale));
  color: var(--color-primary);
  font-weight: 600;
  break-before: column;
}

h3 {
  font-size: calc(clamp(36px, 6cqi, 80px) * var(--font-scale) * var(--mode-scale));
  color: var(--color-secondary);
  font-weight: 600;
}

h4 {
  font-size: calc(clamp(30px, 5cqi, 70px) * var(--font-scale) * var(--mode-scale));
  color: var(--color-primary-light);
}

/* ===========================
   段落
   =========================== */
p {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: calc(clamp(28px, 5cqi, 60px) * var(--font-scale) * var(--mode-scale));
  line-height: 1.8;
  letter-spacing: 0.1em;
  margin: 0 0.8rem;
  color: var(--color-text-primary);
}

/* ===========================
   列表
   =========================== */
ul, ol {
  writing-mode: vertical-rl;
  list-style-position: inside;
  margin: 0 20px;
  padding: 0;
}

li {
  font-size: calc(clamp(28px, 5cqi, 60px) * var(--font-scale) * var(--mode-scale));
  line-height: 1.8;
  letter-spacing: 0.08em;
  margin-bottom: 0.8rem;
}

li::marker {
  color: var(--color-primary);
}

/* ===========================
   圖片
   =========================== */
img {
  display: block;
  max-width: 80cqw;
  max-height: 80cqh;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  margin-inline: auto;
  break-inside: avoid;
}

/* ===========================
   分頁線（hr = page break）
   =========================== */
hr {
  border: none;
  margin: 0;
  padding: 0;
  height: 0;
  visibility: hidden;
  break-after: column;
}

/* ===========================
   導航列（absolute 定位）
   =========================== */
.slide-nav {
  position: absolute;
  right: 20px;
  bottom: 20px;
  display: flex;
  flex-direction: row;
  gap: 10px;
  z-index: 200;
}

.slide-nav.auto-hidden {
  opacity: 0.2;
}

.slide-nav:hover {
  opacity: 1;
}

.slide-nav button {
  width: 48px;
  height: 48px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.slide-nav button:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===========================
   Sidebar 設定面板
   =========================== */
.sidebar {
  position: fixed;
  top: 0;
  left: -320px;
  width: 300px;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 10000;
  padding: 100px 20px 20px;
  box-sizing: border-box;
  overflow-y: auto;
}

.sidebar.open {
  left: 0;
}

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
}

.sidebar-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.settings-section {
  margin-bottom: 30px;
}

.settings-section h3 {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 15px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  writing-mode: horizontal-tb;
}

.font-size-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.font-size-control button {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: white;
  font-size: 18px;
  cursor: pointer;
}

.font-size-control button:hover {
  background: rgba(255, 255, 255, 0.2);
}

.font-size-control .size-display {
  flex: 1;
  text-align: center;
  color: white;
  font-size: 16px;
}

.toggle-group {
  display: flex;
  gap: 10px;
}

.toggle-group button {
  flex: 1;
  padding: 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: white;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.toggle-group button:hover {
  background: rgba(255, 255, 255, 0.2);
}

.toggle-group button.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.font-select {
  width: 100%;
  padding: 12px 15px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: white;
  font-size: 16px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
}

.font-select:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.font-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.font-select option {
  background: #1a1a2e;
  color: white;
  padding: 10px;
}

.icon-btn-row {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.icon-btn {
  position: relative;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: white;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.icon-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.icon-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  pointer-events: none;
}

.icon-btn:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ===========================
   Lightbox
   =========================== */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.95);
  z-index: 20000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  cursor: pointer;
  padding: 60px;
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

/* 圖文容器 - 直式模式（預設） */
.lightbox-content {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 30px;
  width: 100vw;
  height: 80vh;
}

/* 橫式模式 */
body.horizontal-mode .lightbox-content {
  flex-direction: row;
}

.lightbox-image-wrap {
  flex: 1 1 70%;
  max-width: 70%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* 無 caption 時圖片可擴展 */
.lightbox-content:has(.lightbox-caption:empty) .lightbox-image-wrap {
  max-width: 100%;
}

.lightbox img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  cursor: grab;
  touch-action: none;
  transition: transform 0.1s ease-out;
}

.lightbox img:active {
  cursor: grabbing;
}

.lightbox-caption {
  flex: 0 0 30%;
  color: white;
  font-size: calc(clamp(28px, 5cqi, 60px) * var(--font-scale) * var(--mode-scale));
  line-height: 1.8;
  letter-spacing: 0.1em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.lightbox-caption:empty {
  display: none;
}

/* 橫式模式文字 */
body.horizontal-mode .lightbox-caption {
  writing-mode: horizontal-tb;
}

.lightbox-controls {
  position: absolute;
  bottom: 20px;
  display: flex;
  gap: 10px;
}

.lightbox-controls button {
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: white;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-controls button:hover {
  background: rgba(255, 255, 255, 0.3);
}

.lightbox-zoom-info {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.6);
  padding: 8px 16px;
  border-radius: 20px;
  color: white;
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.3s;
}

.lightbox-zoom-info.show {
  opacity: 1;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  opacity: 0.7;
}

.lightbox-close:hover {
  opacity: 1;
}

/* 讓內容圖片可點擊 */
.manuscript img {
  cursor: zoom-in;
}

/* 載入訊息 */
.loading-message {
  font-size: 32px;
  color: var(--color-text-secondary);
  text-align: center;
  padding: 100px;
}

/* ===========================
   遙控 Modal
   =========================== */
.remote-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.9);
  z-index: 30000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
}

.remote-modal.active {
  opacity: 1;
  visibility: visible;
}

.remote-modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  opacity: 0.7;
}

.remote-modal-close:hover {
  opacity: 1;
}

.remote-modal * {
  writing-mode: horizontal-tb;
}

.remote-modal h2 {
  color: #5FCFC3;
  font-size: 24px;
  margin-bottom: 20px;
}

.remote-modal p {
  color: #888;
  font-size: 14px;
  margin-bottom: 20px;
}

#qrcode {
  background: white;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.remote-url {
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 20px;
  border-radius: 8px;
  font-family: monospace;
  font-size: 14px;
  color: #5FCFC3;
  word-break: break-all;
  max-width: 90%;
  text-align: center;
}

.remote-status {
  margin-top: 20px;
  color: #888;
  font-size: 14px;
}

.remote-status.connected {
  color: #4CAF50;
}

/* ===========================
   快捷鍵說明 Modal
   =========================== */
.help-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.9);
  z-index: 30000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
}

.help-modal.active {
  opacity: 1;
  visibility: visible;
}

.help-modal-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  opacity: 0.7;
}

.help-modal-close:hover {
  opacity: 1;
}

.help-modal * {
  writing-mode: horizontal-tb;
}

.help-content {
  max-width: 900px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
}

.help-content h2 {
  color: #5FCFC3;
  font-size: 28px;
  margin-bottom: 30px;
  text-align: center;
}

.help-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

@media (max-width: 700px) {
  .help-columns {
    grid-template-columns: 1fr;
  }
}

.help-column h3 {
  color: #FFD700;
  font-size: 16px;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.help-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  color: #E8E8E8;
  font-size: 14px;
}

.help-item span {
  color: rgba(255, 255, 255, 0.7);
}

kbd {
  display: inline-block;
  padding: 4px 8px;
  font-family: monospace;
  font-size: 12px;
  color: #333;
  background: linear-gradient(180deg, #f5f5f5 0%, #e0e0e0 100%);
  border: 1px solid #ccc;
  border-radius: 4px;
  box-shadow: 0 2px 0 #999, inset 0 0 0 1px #fff;
  margin: 0 2px;
}

/* ===========================
   Go-to-page Modal
   =========================== */
.goto-modal {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(0, 0, 0, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 30000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s, visibility 0.15s;
}
.goto-modal.active {
  opacity: 1;
  visibility: visible;
}
.goto-modal * {
  writing-mode: horizontal-tb;
}
.goto-modal-close {
  position: absolute;
  top: 20px; right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  opacity: 0.7;
}
.goto-modal-close:hover { opacity: 1; }

.goto-content {
  width: 90%;
  max-width: 50%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: max-width 0.2s;
}
.goto-content.grid-mode {
  /* Fill nearly the whole viewport in grid mode so 3 columns of
     content-area-aspect thumbnails get as much canvas as possible. */
  max-width: 95%;
}

.goto-input-wrap {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.goto-input-wrap input {
  flex: 1;
  height: 56px;
  padding: 0 16px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 24px;
  font-family: inherit;
  outline: none;
  text-align: center;
}
.goto-input-wrap input::placeholder { color: rgba(255,255,255,0.4); }
.goto-input-wrap input:focus { border-color: #5FCFC3; box-shadow: 0 0 0 3px rgba(95,207,195,0.2); }
.goto-input-wrap button {
  height: 56px;
  padding: 0 24px;
  border: none;
  border-radius: 8px;
  background: #5FCFC3;
  color: #1a1a2e;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.goto-input-wrap button:hover { background: #7EDDD3; }

.goto-toc {
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}
.goto-toc-title {
  color: #FFD700;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.goto-toc-item {
  display: flex;
  align-items: center;
  padding: 12px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.1s;
  gap: 14px;
}
.goto-toc-item:hover { background: rgba(255,255,255,0.08); }
.goto-toc-item .toc-page {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(95,207,195,0.15);
  color: #5FCFC3;
  border-radius: 8px;
  font-size: 18px;
  font-weight: 700;
}
.goto-toc-item .toc-text {
  flex: 1;
  color: #E8E8E8;
  font-size: 24px;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.goto-toc-item[data-level="1"] .toc-text { font-size: 28px; font-weight: 600; color: #fff; }
.goto-toc-item[data-level="2"] .toc-text { padding-left: 16px; }
.goto-toc-item[data-level="3"] .toc-text { padding-left: 32px; font-size: 22px; color: rgba(255,255,255,0.7); }
.goto-toc-empty {
  color: rgba(255,255,255,0.4);
  font-size: 20px;
  text-align: center;
  padding: 24px 0;
}

/* ===========================
   Go-to-page Tabs
   =========================== */
.goto-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 4px;
}
.goto-tab {
  flex: 1;
  padding: 12px 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: rgba(255,255,255,0.5);
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
}
.goto-tab:hover {
  color: rgba(255,255,255,0.8);
}
.goto-tab.active {
  background: rgba(95,207,195,0.2);
  color: #5FCFC3;
}

.goto-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
.goto-panel-hidden {
  display: none;
}

/* ===========================
   Grid Overview
   =========================== */
.goto-grid {
  display: grid;
  /* 3 columns per row, PowerPoint-like — larger thumbnails for older readers. */
  grid-template-columns: repeat(3, 1fr);
  /* Rows take their content's natural height. Without this, the grid is
     inside a flex container with `min-height: 0` and rows would compress
     to 0 even when items declare `aspect-ratio`. */
  grid-auto-rows: max-content;
  gap: 20px;
  align-items: start;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
  padding: 8px;
}
.goto-grid-item {
  /* JS sets `aspect-ratio` per-item to match the live content-area's
     aspect, so the thumbnail mirrors what the user actually sees on
     screen. CSS aspect-ratio: 1 / 1 here is a safe fallback that
     prevents rows from collapsing to 0 before JS runs. */
  aspect-ratio: 1 / 1;
}
.goto-grid-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid rgba(255,255,255,0.1);
  transition: border-color 0.15s, transform 0.15s;
  background: rgba(0,0,0,0.4);
}
.goto-grid-item:hover {
  border-color: rgba(95,207,195,0.5);
  transform: scale(1.03);
}
.goto-grid-item.current {
  border-color: #5FCFC3;
  box-shadow: 0 0 0 2px rgba(95,207,195,0.3);
}
.goto-grid-preview {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: top left;
  overflow: hidden;
  pointer-events: none;
}
/* Mirrors .print-page-bg — paints the theme background and applies the
 * content-area padding (60/80) so the inner clip equals the live
 * manuscript-container size. */
.goto-preview-bg {
  width: 100%;
  height: 100%;
  background-image: url('../theme/default/background.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #1a1a2e;
  padding: 60px 80px;
  box-sizing: border-box;
}
/* Mirrors .print-page-clip — restores the container-type:size chain so
 * cqw/cqh and percent units inside the slide-page clone behave like the
 * live render. */
.goto-preview-clip {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  container-type: size;
}
.goto-modal .goto-grid-preview * {
  writing-mode: inherit;
}
.goto-grid-page {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #5FCFC3;
  font-size: 18px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 6px;
  z-index: 1;
}

/* ===========================
   Search Bar
   =========================== */
.search-bar {
  position: fixed;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 25000;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(20, 20, 40, 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 10px 16px;
  transition: top 0.2s ease;
  writing-mode: horizontal-tb;
}
.search-bar.active {
  top: 20px;
}
.search-icon {
  color: rgba(255,255,255,0.5);
  flex-shrink: 0;
}
.search-bar input {
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 16px;
  font-family: inherit;
  width: 200px;
}
.search-bar input::placeholder {
  color: rgba(255,255,255,0.4);
}
.search-count {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  white-space: nowrap;
  min-width: 40px;
  text-align: center;
}
.search-nav-btn {
  width: 28px;
  height: 28px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: white;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.search-nav-btn:hover {
  background: rgba(255,255,255,0.2);
}
.search-close-btn {
  width: 28px;
  height: 28px;
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.6);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.search-close-btn:hover {
  color: white;
}

/* Search Highlights */
.search-highlight {
  background: rgba(255, 215, 0, 0.4);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}
.search-highlight.current {
  background: rgba(255, 140, 0, 0.8);
  box-shadow: 0 0 0 2px rgba(255, 140, 0, 0.4);
}

/* ===========================
   Print / Export PDF
   =========================== */

/* Hidden by default */
#printContainer {
  display: none;
}

.print-page {
  page-break-after: always;
}

.print-page:last-child {
  page-break-after: avoid;
}

.print-page-bg {
  width: 100%;
  height: 100%;
  background-image: url('../theme/default/background.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-color: #1a1a2e;
  padding: 60px 80px;
}

.print-page-clip {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
  container-type: size;
}

.print-page-clip .manuscript {
  position: absolute;
  top: 0;
  left: 0;
}

@media print {
  /* Force background colors and images */
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }

  /* Hide all screen UI */
  .app-layout,
  .search-bar,
  .lightbox,
  .sidebar,
  .sidebar-overlay,
  .remote-modal,
  .help-modal,
  .goto-modal {
    display: none !important;
  }

  /* Reset body for print */
  html, body {
    overflow: visible;
    height: auto;
    width: auto;
  }

  body {
    background: none;
  }

  /* Show print container */
  #printContainer {
    display: block;
  }

  .print-page {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
  }

  .print-page-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
  }

  /* @page size is set dynamically by print.js */
}

/* ===========================
   Context Menu (Right-click)
   =========================== */
.context-menu {
  display: none;
  position: fixed;
  z-index: 10000;
  min-width: 300px;
  background: rgba(20, 20, 40, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 10px 0;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}

.context-menu.active {
  display: block;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 16px 24px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.9);
  font-size: 22px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}

.context-menu-item:hover {
  background: rgba(95, 207, 195, 0.15);
}

.context-menu-item:active {
  background: rgba(95, 207, 195, 0.25);
}

.context-menu-icon {
  width: 32px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.context-menu-icon svg {
  stroke: var(--color-primary);
  fill: none;
}

.context-menu-icon svg[fill="currentColor"] {
  fill: var(--color-primary);
  stroke: none;
}

.context-menu-label {
  flex: 1;
}

.context-menu-divider {
  height: 1px;
  margin: 6px 20px;
  background: rgba(255, 255, 255, 0.1);
}