:root {
  --sans-serif: "ui-sans-serif", "-apple-system", "BlinkMacSystemFont";
  --width: 230px;
  --hover-color: rgb(235, 235, 235);
}

#app {
  margin: 0;
  padding: 0;
  border: 0;
  color: rgba(99, 98, 97);
  font-family: var(--sans-serif);
}

/* 좌측 영역 */
.sidebar {
  background-color: rgb(251, 251, 251);
  color: rgba(25, 23, 17, 0.6);
  border-right: 1px solid rgb(245, 245, 245);
  height: 100vh;
  width: var(--width);
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-sizing: border-box;
  padding-left: 8px;
}

h3 {
  padding: 16px 10px 16px 4px;
  font-weight: 600;
  color: rgb(55, 53, 47);
}

h3::before {
  content: "✨";
  margin-right: 4px;
}

/* 문서 리스트 영역 */
details {
  color: rgba(25, 23, 17, 0.6);
}

details > ul {
  padding-left: 16px;
}

details > ul > .empty {
  color: rgba(25, 23, 17, 0.5);
  font-size: 14px;
  font-weight: 500;
  padding-left: 12px;
  margin-top: 4px;
  margin-bottom: 4px;
}

summary {
  list-style-type: none;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  margin: 1px 0;
  padding: 2px 10px 2px 5px;
}

summary:hover {
  background-color: var(--hover-color);
  border-radius: 3px;
  cursor: pointer;
}

.document-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-grow: 1;
}

.document-buttons {
  display: none;
}

summary:hover > .document-buttons {
  display: flex;
  flex-direction: row;
  color: rgba(25, 23, 17, 0.6);
}

summary:hover > .document-buttons > button:hover {
  background-color: rgba(55, 53, 47, 0.08);
  border-radius: 4px;
}

details[open] summary::before {
  content: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='12px' viewBox='0 0 448 512'%3E%3Cstyle%3Esvg%7Bfill:%23767571%7D%3C/style%3E%3Cpath d='M201.4 342.6c12.5 12.5 32.8 12.5 45.3 0l160-160c12.5-12.5 12.5-32.8 0-45.3s-32.8-12.5-45.3 0L224 274.7 86.6 137.4c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3l160 160z'/%3E%3C/svg%3E");
  display: inline-block;
  padding: 4px;
  width: 12px;
  height: 12px;
}

details:not([open]) summary::before {
  content: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='12px' viewBox='0 0 320 512'%3E%3Cstyle%3Esvg%7Bfill:%23767571%7D%3C/style%3E%3Cpath d='M278.6 233.4c12.5 12.5 12.5 32.8 0 45.3l-160 160c-12.5 12.5-32.8 12.5-45.3 0s-12.5-32.8 0-45.3L210.7 256 73.4 118.6c-12.5-12.5-12.5-32.8 0-45.3s32.8-12.5 45.3 0l160 160z'/%3E%3C/svg%3E");
  display: inline-block;
  padding: 4px;
  width: 12px;
  height: 12px;
}

.sidebar h4 {
  display: flex;
  align-items: center;
  border: none;
  padding: 2px 10px;
  min-height: 24px;
  font-size: 14px;
}

.sidebar h4::before {
  content: "+";
  width: 10px;
  display: inline-block;
  padding-right: 4px;
}

.sidebar h4:hover {
  background-color: var(--hover-color);
  cursor: pointer;
}

button {
  background-color: var(--hover-color);
  color: rgb(55, 53, 47);
  font-weight: 600;
  width: 20px;
  height: 20px;
  margin: 0 0 0 2px;
  cursor: pointer;
}

/* 우측 데이터 영역 */
.editor {
  padding: 0px 50px;
  width: calc(100vw - var(--width));
  box-sizing: border-box;
}

.editor .title {
  font-size: 40px;
  border: none;
  outline: none;
  margin: 120px 0 30px 0;
  font-family: var(--sans-serif);
  font-weight: 700;
}

.editor .content {
  font-size: 16px;
  height: 400px;
  border: none;
  outline: none;
  font-family: var(--sans-serif);
}