:root {
  --bg: #eef8f0;
  --panel: #fbfefb;
  --panel-soft: #f4fbf5;
  --line: #cfe3d2;
  --line-strong: #9fc8a8;
  --text: #183127;
  --muted: #65786c;
  --accent: #2f9e68;
  --accent-dark: #237850;
  --accent-soft: #dff3e5;
  --selected: #dc2626;
  --selected-soft: #fee2e2;
  --selected-line: #fca5a5;
  --danger: #b45309;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
.topbar a {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
  text-decoration: none;
}

button:hover,
.topbar a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: linear-gradient(180deg, #fbfefb 0%, #f1faf3 100%);
  border-bottom: 1px solid var(--line);
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
}

.topbar span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.topbar nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.layout {
  height: calc(100vh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 14px;
  padding: 14px;
}

.editor-pane,
.tree-pane {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(35, 120, 80, 0.07);
  min-height: 0;
}

.editor-pane {
  display: flex;
  flex-direction: column;
}

.meta-row {
  display: grid;
  grid-template-columns: minmax(120px, 180px) 38px minmax(160px, 1fr) minmax(120px, 170px) 70px;
  gap: 10px;
  align-items: end;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}

.meta-row label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
}

.meta-row input,
.meta-row select {
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  background: #fff;
  color: var(--text);
}

.meta-row input:focus,
.meta-row select:focus,
#editor:focus {
  border-color: var(--accent);
  outline: 2px solid rgba(47, 158, 104, 0.12);
}

.editor-tools {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: #f7fcf8;
}

.view-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  background: #f7fcf8;
  font-size: 13px;
  color: var(--muted);
}

.view-toggle__label {
  font-weight: 600;
}

.view-toggle__btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  transition: all 0.15s ease;
}

.view-toggle__btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.view-toggle__btn.is-active {
  border-color: var(--accent-dark);
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(35, 120, 80, 0.24);
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tool-group-primary {
  margin-left: auto;
}

.editor-tools button {
  min-height: 34px;
}

.icon-btn {
  height: 36px;
  font-size: 18px;
  line-height: 1;
}

.split {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.split[data-view-mode="source"] {
  grid-template-columns: 1fr;
}

.split[data-view-mode="preview"] {
  grid-template-columns: 1fr;
}

.split[data-view-mode="preview-fullscreen"] {
  grid-template-columns: 1fr;
}

#editor {
  width: 100%;
  height: 100%;
  resize: none;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 18px;
  outline: none;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.6;
}

.preview {
  overflow: auto;
  padding: 18px;
  line-height: 1.65;
}

.preview h1,
.preview h2,
.preview h3 {
  line-height: 1.25;
}

.preview pre {
  background: #111827;
  color: #eef2ff;
  border-radius: 6px;
  padding: 12px;
  overflow: auto;
}

.preview code {
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 2px 4px;
}

.preview pre code {
  background: transparent;
  padding: 0;
}

.preview img {
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  overflow: hidden;
}

.preview th,
.preview td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  vertical-align: top;
}

.preview th {
  background: #e6f5ea;
}

.preview blockquote {
  margin: 12px 0;
  padding: 8px 12px;
  border-left: 4px solid var(--accent);
  background: #f3faf5;
  color: #34483d;
}

.preview hr {
  border: 0;
  border-top: 1px solid var(--line-strong);
  margin: 18px 0;
}

.preview ul,
.preview ol {
  padding-left: 24px;
}

.preview input[type="checkbox"] {
  accent-color: var(--accent);
}

body.preview-fullscreen {
  overflow: hidden;
}

body.preview-fullscreen .topbar,
body.preview-fullscreen .tree-pane,
body.preview-fullscreen .meta-row,
body.preview-fullscreen .editor-tools {
  display: none;
}

body.preview-fullscreen .layout {
  display: block;
  height: 100vh;
  padding: 0;
}

body.preview-fullscreen .editor-pane {
  position: fixed;
  inset: 0;
  z-index: 1000;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

body.preview-fullscreen .view-toggle {
  position: absolute;
  top: 12px;
  right: 14px;
  z-index: 2;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(24, 49, 39, 0.14);
}

body.preview-fullscreen .split {
  min-height: 0;
}

body.preview-fullscreen .preview {
  padding: 74px 6vw 32px;
}

.status {
  min-height: 34px;
  padding: 8px 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.tree-pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tree-head {
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.tree {
  overflow: auto;
  padding: 10px;
}

.cat {
  margin-bottom: 10px;
}

.folder-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 6px;
  color: var(--text);
  font-weight: 650;
  text-align: left;
}

.folder-row.level-0 {
  background: #e6f5ea;
  border-color: #cfe8d5;
}

.folder-row.level-1 {
  margin-top: 6px;
  padding-left: 24px;
  background: var(--panel-soft);
}

.folder-row:hover,
.folder-row.drop-target {
  color: var(--accent-dark);
  background: #d7efde;
  border-color: var(--line-strong);
}

.folder-row.selected-cat {
  color: var(--selected);
  background: var(--selected-soft);
  border-color: var(--selected-line);
}

.folder-row.drop-target {
  box-shadow: inset 0 0 0 2px rgba(47, 158, 104, 0.24);
}

.folder-left {
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.folder-icon {
  position: relative;
  width: 17px;
  height: 13px;
  border: 1px solid var(--line-strong);
  border-radius: 3px 3px 2px 2px;
  background: #cdebd5;
}

.folder-icon::before {
  content: "";
  position: absolute;
  left: 1px;
  top: -5px;
  width: 8px;
  height: 5px;
  border: 1px solid var(--line-strong);
  border-bottom: 0;
  border-radius: 3px 3px 0 0;
  background: #daf2e1;
}

.twisty {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  color: var(--accent-dark);
  font-size: 12px;
}

.folder-children {
  border-left: 1px solid var(--line);
  margin-left: 18px;
  padding-left: 8px;
}

.note-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  text-align: left;
  margin-top: 5px;
  padding: 8px 10px 8px 30px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  overflow-wrap: anywhere;
}

.note-item input {
  flex: 0 0 auto;
  accent-color: var(--selected);
}

.note-item span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.note-item:hover,
.note-item.active {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.note-item.selected,
.note-item.active.selected {
  color: var(--selected);
  background: var(--selected-soft);
}

.note-item.dragging {
  opacity: 0.55;
}

.image-tree {
  display: grid;
  gap: 6px;
  padding-top: 6px;
}

.image-tree-item {
  width: 100%;
  min-height: 44px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 24px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  text-align: left;
}

.image-tree-item:hover {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.image-tree-item img {
  width: 42px;
  height: 34px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: #fff;
}

.image-tree-item span {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 13px;
}

.context-menu {
  position: fixed;
  z-index: 30;
  min-width: 120px;
  padding: 6px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 12px 30px rgba(24, 49, 39, 0.16);
}

.context-menu button {
  width: 100%;
  border: 0;
  text-align: left;
  color: var(--text);
  background: transparent;
}

.context-menu button:hover {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.context-menu button:last-child {
  color: var(--danger);
}

.context-menu button:last-child:hover {
  background: #fff7ed;
  color: var(--danger);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 25;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(18, 49, 38, 0.32);
}

.modal[hidden],
.context-menu[hidden] {
  display: none;
}

.modal-card {
  width: min(920px, 100%);
  max-height: min(720px, 90vh);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 22px 60px rgba(24, 49, 39, 0.22);
  overflow: hidden;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: #f1faf3;
}

.image-grid {
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  padding: 14px;
}

.image-card {
  min-height: 170px;
  display: grid;
  grid-template-rows: 110px auto auto;
  gap: 6px;
  text-align: left;
  padding: 8px;
}

.image-card img {
  width: 100%;
  height: 110px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}

.image-card span {
  color: var(--muted);
  font-size: 12px;
}

.image-card strong {
  overflow-wrap: anywhere;
  font-size: 13px;
}

.image-hover-preview {
  position: fixed;
  z-index: 60;
  width: min(420px, calc(100vw - 36px));
  max-height: min(420px, calc(100vh - 36px));
  padding: 8px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 48px rgba(24, 49, 39, 0.24);
  pointer-events: none;
}

.image-hover-preview[hidden] {
  display: none;
}

.image-hover-preview img {
  display: block;
  width: 100%;
  max-height: min(340px, calc(100vh - 90px));
  object-fit: contain;
  border-radius: 6px;
  background: #f7fbf8;
}

.image-hover-preview span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.embedded-html {
  padding: 10px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  background: #fbfefb;
}

.resizable-media {
  position: relative;
  display: inline-block;
  max-width: 100%;
  margin: 8px 0;
  line-height: 0;
}

.resizable-media img,
.resizable-media iframe,
.resizable-media video {
  display: block;
  max-width: 100%;
}

.resizable-media:hover {
  outline: 2px solid rgba(47, 158, 104, 0.22);
  outline-offset: 2px;
}

.resize-handle {
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 14px;
  height: 14px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--accent);
  cursor: nwse-resize;
  box-shadow: 0 2px 8px rgba(24, 49, 39, 0.2);
}

.empty {
  color: var(--muted);
  padding: 8px 18px;
  font-size: 13px;
}

.login-page {
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.login-card h1 {
  margin: 0 0 8px;
}

.login-card p {
  margin: 0 0 20px;
  color: var(--muted);
}

.login-card form,
.login-card label {
  display: grid;
  gap: 10px;
}

.login-card form {
  gap: 16px;
}

.login-card input {
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
}

.login-card button {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.error {
  color: var(--danger);
  margin-bottom: 14px;
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    height: auto;
  }

  .topbar nav {
    width: 100%;
  }

  .topbar nav button,
  .topbar nav a {
    flex: 1 1 auto;
    min-width: 72px;
    text-align: center;
  }

  .layout {
    grid-template-columns: 1fr;
    height: auto;
    padding: 10px;
  }

  .tree-pane {
    min-height: 260px;
  }

  .split {
    min-height: 720px;
    grid-template-columns: 1fr;
  }

  #editor {
    min-height: 360px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .meta-row {
    grid-template-columns: minmax(0, 1fr) 38px;
  }

  .meta-row label:nth-of-type(2),
  .meta-row label:nth-of-type(3),
  .meta-row #moveBtn {
    grid-column: 1 / -1;
  }

  .editor-tools button {
    flex: 1 1 auto;
  }
}

@media (max-width: 640px) {
  body {
    background: var(--panel);
  }

  .topbar {
    padding: 12px;
  }

  .topbar h1 {
    font-size: 20px;
  }

  .topbar span {
    font-size: 12px;
  }

  .layout {
    gap: 10px;
    padding: 8px;
  }

  .editor-pane,
  .tree-pane {
    border-radius: 6px;
    box-shadow: none;
  }

  .split {
    min-height: 640px;
  }

  #editor,
  .preview {
    padding: 12px;
  }

  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    padding: 10px;
  }
}