:root {
  --header-height: 52px;
  --bg: #2a1d1d; 
  --panel: #3d2c2c; 
  --card: #4a3a3a;
  --ink: #e0c9a6; 
  --muted: #a89a8a;
  --border: #5a4a40;
  --accent: #b8860b; 
  --shadow: 0 8px 25px rgba(0,0,0,.5);
  --success: #22c55e; --warning: #f59e0b; --danger: #ef4444;
}
[data-theme="light"] {
  --bg: #fdf6e3;
  --panel: #f5ead5;
  --card: #faf0de;
  --ink: #4a2c2a;
  --muted: #8a6d6b;
  --border: #dcd0b3;
  --accent: #a52a2a;
  --shadow: 0 8px 28px rgba(100,80,80,.15);
  --success: #10b981; --warning: #f59e0b; --danger: #e11d48;
}
[data-theme="sepia"] {
  --bg: #fbf5e9;
  --panel: #fdfaf2;
  --card: #ffffff;
  --ink: #5c4b3f;
  --muted: #8a7a6f;
  --border: #e6daccc4;
  --accent: #a56a42;
  --shadow: 0 8px 28px rgba(100,80,80,.1);
}
[data-theme="deep-sea"] {
  --bg: #0d1a26;
  --panel: #132738;
  --card: #193145;
  --ink: #e0f2ff;
  --muted: #88a0b8;
  --border: #2a4a63;
  --accent: #38bdf8;
  --shadow: 0 8px 25px rgba(0,0,0,.5);
}
[data-theme="slate"] {
  --bg: #1a202c;
  --panel: #2d3748;
  --card: #4a5568;
  --ink: #edf2f7;
  --muted: #a0aec0;
  --border: #718096;
  --accent: #4fd1c5;
  --shadow: 0 8px 25px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0; background:var(--bg); color:var(--ink); font:14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; overflow:hidden;
display: flex; flex-direction: column; transition: background .3s, color .3s;}
#app-header { display: flex; align-items: center;
padding: 0 12px; height: var(--header-height); background: var(--panel); border-bottom: 1px solid var(--border); flex-shrink: 0;
}
/* ===== CẬP NHẬT FONT CHỮ ===== */
#app-header h1 {
  font-family: 'Jaro', sans-serif;
  font-weight: normal;
  font-size: 32px;
  text-align: center;
  text-transform: uppercase;
  color: var(--ink);
  flex-grow: 1;
  margin: 0;
  padding: 4px 8px;
}
#tree-selector-wrapper { margin: 0 10px; flex-shrink: 0;
}
#tree-selector {
    background: var(--bg);
    color: var(--ink);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 8px;
    font-size: 14px;
    max-width: 200px;
}
#app-header h1[contenteditable]:focus { background: var(--bg); outline: 1px solid var(--accent);
box-shadow: 0 0 10px rgb(from var(--accent) r g b / 0.3); }
#btnToggleSidebar { flex-shrink: 0;
width: 40px; height: 40px; padding: 8px; background: transparent; border: 1px solid transparent; color: var(--muted);
}
#btnToggleSidebar:hover { color: var(--ink); background: var(--card); border-color: var(--border); transform: none; }

.app {
    display: block;
    height: calc(100vh - var(--header-height));
    padding: 4px;
    gap: 12px;
}
.right {
    height: 100%;
}
.left {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: min(85vw, 340px); 
    z-index: 100;
    transform: translateX(-100%);
    transition: transform .3s ease;
    display:flex;
    flex-direction:column;
    overflow:hidden;
}
.app:not(.sidebar-collapsed) .left {
    transform: translateX(0);
}
#overlay {
    display: block;
}
.app:not(.sidebar-collapsed) #overlay:not(.show-for-media) {
    opacity: 1;
    visibility: visible;
}

.panel{background:var(--panel); border:1px solid var(--border); border-radius:16px; box-shadow:var(--shadow);}
.left header{padding:16px 16px 8px;border-bottom:1px solid var(--border)}
.left header h1{font-size:16px;margin:0 0 4px}
.left header .sub{color:var(--muted);font-size:12px}
.scroll{overflow:auto;padding:12px}
.field{display:flex;flex-direction:column;gap:6px;margin:12px 0}
input,textarea{background:var(--bg);border:1px solid var(--border);color:var(--ink);border-radius:10px;padding:10px}
.right{position:relative;overflow:hidden}
.canvas-container{
  position:relative;
  height:100%;
  overflow:hidden;
  border-radius:16px;
  background-color: var(--bg);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center; 
  transition: background-image .3s; 
  touch-action: none;
  cursor: default;
}
#tree-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}
#node-icons-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}
.node-icon {
    position: absolute;
    transform-origin: center center;
    will-change: transform;
}
#tree-decoration {
  position: absolute;
  width: 150px;
  height: auto;
  z-index: 3;
  pointer-events: none;
  opacity: 1.0;
  transform-origin: center bottom;
  will-change: transform;
  visibility: hidden;
}
.toolbar{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:12px 12px 0}
.btn{ appearance:none; border:1px solid var(--border); background:var(--card); color:var(--ink); padding:10px 12px;
border-radius:12px; cursor:pointer; transition:.2s transform,.2s opacity,.2s background-color; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn:hover{transform:translateY(-1px);
background-color: #2a3b55;}
[data-theme="light"] .btn:hover { background-color: #eef2f8; }
.btn[disabled]{ opacity:.5; pointer-events:none;
cursor: not-allowed;}
.topbar{position:absolute;top:12px;right:12px;display:flex;gap:8px;z-index:5}
.topbar .btn{padding:2px 6px; height: 30px; opacity: 0.75;
transition: opacity 0.2s, transform 0.2s; }
.topbar .btn:hover{opacity: 1;
transform: scale(1.05);}
.topbar .btn svg{width: 16px; height: 16px;}
.topbar .btn .tooltip-text {font-size: 12px;}
#zoomReset { font-size: 13px;
}
@media (max-width: 500px) { .topbar .btn .tooltip-text { display: none; } }
.toggle{display:inline-flex;
align-items:center;
gap:.5rem;}
.toggle-wrapper.disabled { opacity: 0.5; pointer-events: none;
}

.modal{position:fixed;inset:0;display:none;place-items:center;background:rgba(0,0,0,.45);z-index:20}
.modal.show{display:grid}
.dialog{width:min(560px,96vw);background:var(--panel);border:1px solid var(--border);border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.5)}
.dialog header{padding:14px 16px;border-bottom:1px solid var(--border)}
.dialog .body{padding:12px 16px;display:grid;gap:10px}
.dialog footer{padding:12px 16px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}
#stats-content div { display: flex;
justify-content: space-between; padding: 5px 2px; font-size: 13px; }
#stats-content div:not(:last-child) { border-bottom: 1px solid var(--border);
}
#stats-content strong { color: var(--accent); font-weight: 600;
}
#stats .total-row { border-top: 2px solid var(--border) !important; margin-top: 4px; padding-top: 6px; font-weight: bold;
}
.hint{font-size:12px;color:var(--muted); padding: 0 12px 12px;}
.kbd{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
font-size:11px; padding:.12rem .35rem; border:1px solid var(--border); border-radius:6px; background:var(--bg) }
.btn-group { display: flex; gap: 8px;
}
#bottom-right-ui { 
  position: absolute; 
  bottom: 12px; 
  right: 12px; 
  z-index: 10; 
  display: flex; 
  align-items: flex-end;
  gap: 8px;
  pointer-events: none;
}
#bottom-right-ui > * {
  pointer-events: auto;
}
.button-group-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}
#bottom-right-ui .btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  padding: 5px;
  flex-shrink: 0;
  opacity: 0.8;
  transition: opacity 0.2s, transform 0.2s;
}
#bottom-right-ui .btn svg {
  width: 20px;
  height: 20px;
}
#bottom-right-ui .btn:hover {
  opacity: 1;
  transform: scale(1.05);
}
.owner-only-field {
  display: none !important;
}
.owner-mode .owner-only-field {
  display: flex !important;
}

#overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
  display: none;
}
#overlay.show-for-media {
  display: block;
  opacity: 1;
  visibility: visible;
}

.media-sidebar {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: min(85vw, 320px);
  z-index: 100;
  transform: translateX(100%);
  transition: transform .3s ease;
  display: flex;
  flex-direction: column;
}
.media-sidebar.show {
  transform: translateX(0);
}
.media-sidebar header {
    display: flex;
    align-items: flex-start;
    padding: 16px 16px 8px;
    border-bottom: 1px solid var(--border);
}
.media-sidebar header h1 { margin: 0; font-size: 16px;
}
#btnCloseImage, #btnCloseAudio { padding: 4px 8px;
}
.media-section {
    padding: 8px 12px;
}
.media-section h2 {
    font-size: 14px;
    color: var(--muted);
    margin: 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 8px;
}
.gallery-item {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border);
}
.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .2s;
}
.gallery-item:hover img {
    transform: scale(1.1);
}
.playlist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.playlist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg);
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background-color .2s;
    position: relative;
    overflow: hidden;
}
.playlist-item:hover, .playlist-item.playing {
    background: var(--card);
}
.playlist-item .play-icon { font-size: 18px; z-index: 2;}
.playlist-item .track-name { flex-grow: 1;
font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; z-index: 2;}
.playlist-item .progress-bar {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 0%;
    background-color: var(--accent);
    opacity: 0.2;
    transition: width 0.1s linear;
    pointer-events: none;
    z-index: 1;
}
#gallery-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}
#gallery-prev, #gallery-next {
    pointer-events: auto;
    background: rgba(0,0,0,0.4);
    color: white;
    border: none;
    padding: 16px 12px;
    cursor: pointer;
    font-size: 24px;
    opacity: 0.5;
    transition: opacity 0.2s;
}
#gallery-prev:hover, #gallery-next:hover {
    opacity: 1;
}
#selection-actions {
    position: absolute;
    bottom: 20px;
    left: 20px;
    z-index: 10;
    width: 200px;
    padding: 12px;
    transition: transform .3s ease, opacity .3s ease, visibility .3s ease;
}
#selection-actions.hidden {
    transform: translateY(10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.actions-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}
.actions-grid .btn {
    width: 100%;
    justify-content: flex-start;
}
#btnClearSearch:hover {
  color: var(--ink);
}

.info-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.info-item.inline-label strong {
    display: inline;
    margin-bottom: 0;
}

@media (max-width: 600px) {
  #app-header h1 {
    font-size: 16px;
    white-space: normal;
    line-height: 1.2;
    margin: 0 8px;
  }
}

@media print {
  body { background: #fff; color: #000; }
  .app { display: block; height: auto; padding: 0; }
  #app-header, .left, .topbar, #bottom-right-ui, #overlay, .media-sidebar, #selection-actions, #info-panel { display: none; }
  .panel.right { border: none; box-shadow: none; border-radius: 0; }
  .canvas-container { border-radius: 0; }
}

.selection-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

#selection-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--card);
  border: 2px solid var(--border);
  flex-shrink: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  cursor: pointer;
  border-style: dashed;
  transition: border-color .2s, background-color .2s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--muted);
}
#selection-avatar:hover {
  border-color: var(--accent);
  background-color: var(--bg);
}

#selection-name-label {
    margin: 0;
    font-size: 13px;
    font-weight: normal;
    color: var(--muted);
}
#selection-name-value {
    font-size: 16px;
    font-weight: bold;
    color: var(--ink);
    margin-top: 2px;
    white-space: normal;
    word-break: break-word;
}

#search-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

#search-container #search {
  width: 0;
  opacity: 0;
  visibility: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  border-radius: 17px;
  padding: 8px 35px 8px 15px;
  height: 34px;
  transition: all .3s ease;
  transform: translateX(10px);
  padding-left: 15px;
}

#search-container.search-expanded #search {
  width: 200px;
  opacity: 1;
  visibility: visible;
  margin-right: -34px;
  transform: translateX(0);
}

#search-container #btnClearSearch {
  position: absolute;
  right: 45px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  display: none;
  padding: 0 8px;
  font-size: 20px;
  line-height: 1;
  z-index: 1;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}

#search-container.search-expanded #btnClearSearch {
  opacity: 1;
  pointer-events: auto;
}

#search-container #btnToggleSearch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  padding: 5px;
  flex-shrink: 0;
  z-index: 2;
}

.actions-grid .btn.btn-accept {
    background-color: var(--success);
    color: white;
}

.actions-grid .btn.btn-reject {
    background-color: var(--danger);
    color: white;
}

/* THAY THẾ TOÀN BỘ CỤM CSS CHO INFO PANEL BẰNG CỤM NÀY */

/* --- GIAO DIỆN MỚI CHO INFO PANEL --- */
#info-panel {
  position: absolute; 
  bottom: 20px;
  left: 20px;
  z-index: 10;
  width: 240px; /* Giảm chiều rộng */
  padding: 12px; /* Giảm padding */
  padding-top: 45px;
  transition: transform .3s ease, opacity .3s ease, visibility .3s ease;
  margin-top: 35px; /* Giảm khoảng cách với top */
  background: #2c3e50;
  border: none;
}

/* Áp dụng màu sắc cho các theme khác nhau */
[data-theme="light"] #info-panel {
    background: #ffffff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
[data-theme="deep-sea"] #info-panel {
    background: #193145;
}
[data-theme="slate"] #info-panel {
    background: #4a5568;
}

#info-panel.hidden {
  transform: translateY(10px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#info-panel #info-avatar {
  position: absolute;
  top: 0;
  right: 15px;
  transform: translateY(-50%);
  width: 80px; /* Giảm kích thước avatar */
  height: 80px; /* Giảm kích thước avatar */
  border-radius: 50%;
  border: 2px solid var(--panel);
  background-size: cover;
  background-position: center;
  z-index: 12;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

#info-panel #info-name {
  font-size: 20px; /* Giảm kích thước tên */
  font-weight: 700;
  color: var(--accent);
  margin: -10px 0 12px 0; /* Giảm margin bottom */
  padding-bottom: 8px; /* Giảm padding bottom */
  border-bottom: 1px solid var(--border);
  line-height: 1.2;
}

#info-panel .info-grid {
  display: flex;
  flex-direction: column;
  gap: 10px; /* Giảm khoảng cách các mục */
}

#info-panel .info-item {
  line-height: 1.3;
}

#info-panel .info-label {
  display: block;
  font-size: 12px; /* Giảm kích thước label */
  color: var(--muted);
  margin-bottom: 2px;
}

#info-panel .info-value {
  font-size: 15px; /* Giảm kích thước value */
  font-weight: 600;
  color: var(--ink);
}

#info-panel #act-propose-child {
  width: 100%;
  margin-top: 15px; /* Giảm khoảng cách với nút */
  background-color: var(--success);
  color: white;
  border-radius: 999px;
  font-weight: 600;
  padding: 10px; /* Giảm padding nút */
  border: none;
  font-size: 14px;
  transition: transform 0.2s, box-shadow 0.2s;
}

#info-panel #act-propose-child:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(from var(--success) r g b / 0.4);
}
/* (SỬA LỖI: Đã xóa dấu '}' thừa ở đây) */
/* CSS cho nút Xóa Media */
.gallery-item, .playlist-item {
  position: relative;
}

.delete-media-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 3;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: none;
  background-color: rgba(239, 68, 68, 0.8); /* Màu đỏ */
  color: white;
  font-weight: bold;
  cursor: pointer;
  display: none; /* Mặc định ẩn */
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s, background-color 0.2s;
}

.delete-media-btn:hover {
  background-color: rgba(220, 38, 38, 1); /* Đỏ đậm hơn */
  opacity: 1;
}

/* Chỉ hiện nút Xóa khi Admin đăng nhập */
.owner-mode .delete-media-btn {
  display: flex;
}
/* CSS cho ảnh xem trước (Preview) ở Sidebar */
.settings-preview-img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 8px;
  background-color: var(--bg);
  display: none; /* Mặc định ẩn đi */
}

/* Chỉ hiện ra khi nó có ảnh (có src) */
.settings-preview-img[src] {
  display: block; 
}
/* ===== SỬA GIAO DIỆN ADMIN (PHIÊN BẢN 2) ===== */

/* 1. Chia toolbar (các nút chức năng) thành 3 cột */
.toolbar {
  grid-template-columns: 1fr 1fr 1fr;
}

/* 2. Xóa style cũ của nút Save (vì nó không còn trong grid nữa) */
.toolbar #btnSaveChanges {
  grid-column: auto; 
}

/* 3. Căn chỉnh header mới (Chỉ chứa nút Lưu) */
/* Làm cho nút "Lưu Thay Đổi" căn sang bên phải */
#header-admin-controls {
  display: flex;
  justify-content: flex-end; /* Đẩy nút "Lưu" sang bên phải */
  margin-top: 8px; /* Thêm một chút khoảng cách với nút Đăng xuất */
}

/* 4. Đảm bảo nút "Lưu" có kích thước hợp lý */
#header-admin-controls #btnSaveChanges {
  flex-shrink: 0; 
  padding: 8px 12px; 
  width: auto; 
  width: 100%; /* Cho nút "Lưu" rộng toàn bộ */
}

/* 5. Căn chỉnh nút Đăng xuất (nếu có) */
#auth-container #signout-button {
    width: 100% !important; /* Đảm bảo nút đăng xuất cũng rộng 100% */
}
/* ===== KẾT THÚC SỬA GIAO DIỆN ===== */

/* ===== BẮT ĐẦU CẬP NHẬT: CSS CHO THUMBNAIL ===== */
.preset-thumbnails {
  display: flex;
  gap: 10px;
  margin: 8px 0 12px 0;
}

.thumbnail-option {
  width: 60px;
  height: 40px;
  border-radius: 6px;
  border: 2px solid var(--border);
  cursor: pointer;
  overflow: hidden;
  transition: all 0.2s ease;
  flex-shrink: 0;
  position: relative;
  background-color: var(--bg); /* Nền cho thumbnail */
}

.thumbnail-option img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none; /* Giúp click nhận đúng vào div cha */
}

/* Hiệu ứng khi được chọn */
.thumbnail-option.active {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgb(from var(--accent) r g b / 0.5);
  transform: scale(1.05);
}

/* Hiệu ứng khi hover (Admin) */
.owner-mode .thumbnail-option:not(.active):hover {
  border-color: var(--warning); /* Màu vàng để báo Admin có thể sửa */
  transform: scale(1.02);
}

/* Hiệu ứng khi hover (User) */
body:not(.owner-mode) .thumbnail-option:not(.active):hover {
  border-color: var(--muted);
  transform: scale(1.02);
}
/* ===== KẾT THÚC CẬP NHẬT: CSS CHO THUMBNAIL ===== */


/* ===== BẮT ĐẦU CẬP NHẬT: Ẩn các trường input, label và preview ===== */
.owner-mode #bg-input-label,
.owner-mode #deco-input-label,
.owner-mode #bgUrlInput,
.owner-mode #decorationUrlInput,
#bgPreview,
#decoPreview {
    display: none !important;
}

/* Căn chỉnh lại nút Tải lên (cho vừa) */
.owner-mode .btn-group {
    justify-content: flex-end; /* Đẩy nút "Tải lên" về phía bên phải */
}
/* ===== KẾT THÚC CẬP NHẬT ===== */