:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --text: #111111;
  --muted: #666666;
  --line-main: #b8c0ca;
  --line-section: #cdd4dc;
  --line-subtle: #e2e6eb;
  --line-control: #c4ccd5;
  --line-focus: #6f7b88;
  --line: var(--line-section);
  --line-strong: var(--line-focus);
  --input: #ffffff;
  --button: #f7f7f7;
  --button-hover: #eeeeee;
  --danger: #b42318;
  --radius: 0;
}

html[data-theme="dark"] {
  --bg: #111111;
  --panel: #151515;
  --text: #f1f1f1;
  --muted: #a8a8a8;
  --line-main: #58616b;
  --line-section: #444c55;
  --line-subtle: #30363d;
  --line-control: #4d5661;
  --line-focus: #9aa6b2;
  --line: var(--line-section);
  --line-strong: var(--line-focus);
  --input: #1c1c1c;
  --button: #232323;
  --button-hover: #2f2f2f;
  --danger: #ff8b7f;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  letter-spacing: 0;
}

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

button {
  border: 1px solid var(--line-control);
  background: var(--button);
  border-radius: var(--radius);
  min-height: 28px;
  padding: 0 8px;
  cursor: pointer;
}

button:hover {
  background: var(--button-hover);
  border-color: var(--line-strong);
}

input,
select,
textarea {
  border: 1px solid var(--line-control);
  background: var(--input);
  border-radius: var(--radius);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--line-strong);
}

.board {
  display: grid;
  grid-template-columns: 10% 20% 20% 25% 25%;
  width: 100vw;
  height: 100vh;
  background: var(--bg);
}

.panel {
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--line-main);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  padding: 0;
  gap: 0;
}

.panel:last-child {
  border-right: 0;
}

.panel-header,
.todo-heading,
.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 34px;
  padding: 0 8px;
  border-bottom: 1px solid var(--line-section);
  flex: 0 0 auto;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2 {
  font-size: 15px;
  font-weight: 650;
}

h3 {
  font-size: 14px;
  font-weight: 650;
}

.hint,
.count,
.todo-count {
  color: var(--muted);
  font-size: 12px;
}

.ghost-button {
  background: transparent;
  min-height: 26px;
  padding: 0 8px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0;
}

.header-actions button + button {
  border-left: 0;
}

.image-list {
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1 1 auto;
}

.image-card {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  justify-items: center;
  width: 100%;
  min-height: 72px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--line-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--input);
  cursor: zoom-in;
}

.image-index {
  width: 100%;
  height: 100%;
  min-height: 72px;
  border-right: 1px solid var(--line-subtle);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  line-height: 1;
}

.image-card img {
  display: block;
  width: auto;
  max-width: calc(100% - 8px);
  max-height: 96px;
  object-fit: contain;
}

.image-delete {
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  min-height: 24px;
  padding: 0;
  border-color: var(--line-control);
  background: rgba(255, 255, 255, 0.88);
  color: #111111;
}

.split-block {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.note-block {
  flex: 1 1 50%;
}

.quick-block {
  flex: 1 1 50%;
  border-top: 1px solid var(--line-section);
}

.board-textarea {
  width: 100%;
  min-height: 0;
  flex: 1 1 auto;
  resize: none;
  padding: 8px;
  line-height: 1.55;
  border: 0;
  border-radius: 0;
}

.large-textarea {
  height: 100%;
}

.quick-buttons {
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 0;
  flex: 1 1 auto;
}

.quick-button {
  max-width: 100%;
  border-top: 0;
  border-left: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.quick-button.is-hidden {
  opacity: 0.42;
  border-style: dashed;
}

.todo-panel {
  gap: 0;
}

.todo-sections {
  min-height: 0;
  flex: 1 1 auto;
  display: grid;
  grid-template-rows: repeat(3, minmax(0, 1fr));
  gap: 0;
}

.todo-section {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-bottom: 1px solid var(--line-section);
  padding: 0;
}

.todo-section:last-child {
  border-bottom: 0;
}

.todo-heading-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.clear-completed-button {
  min-height: 24px;
  padding: 0 6px;
  font-size: 12px;
  background: transparent;
}

.todo-list {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  min-height: 0;
  flex: 1 1 auto;
}

.todo-list.is-drag-over {
  outline: 1px solid var(--line-strong);
  outline-offset: -1px;
}

.todo-item {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 6px;
  align-items: center;
  min-height: 28px;
  padding: 0 6px;
  border-bottom: 1px solid var(--line-subtle);
  cursor: grab;
}

.todo-item.is-dragging {
  opacity: 0.45;
  cursor: grabbing;
}

.todo-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
}

.todo-text {
  width: 100%;
  min-width: 0;
  height: 27px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
}

.todo-text:focus {
  border: 0;
  outline: none;
}

.todo-item span,
.todo-text {
  min-width: 0;
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.todo-item.is-done span,
.todo-item.is-done .todo-text {
  color: var(--muted);
  text-decoration: line-through;
}

.icon-button {
  width: 26px;
  height: 26px;
  min-height: 26px;
  padding: 0;
}

.focus-companion {
  position: fixed;
  z-index: 30;
  width: 72px;
  height: 72px;
  display: block;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.focus-companion.is-visible {
  opacity: 1;
  visibility: visible;
}

.focus-companion video {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border: 1px solid var(--line-control);
  border-radius: var(--radius);
  background: #000000;
}

.save-bubble {
  position: absolute;
  right: 0;
  bottom: 82px;
  min-width: 220px;
  max-width: 360px;
  padding: 8px 10px;
  border: 1px solid var(--line-control);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  opacity: 0;
  white-space: nowrap;
  transform: translateY(6px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.save-bubble::after {
  content: "";
  position: absolute;
  right: 24px;
  bottom: -6px;
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--line-control);
  border-bottom: 1px solid var(--line-control);
  background: var(--panel);
  pointer-events: none;
  transform: rotate(45deg);
}

.save-bubble.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 80;
  max-width: min(420px, calc(100vw - 32px));
  transform: translateX(-50%) translateY(12px);
  padding: 9px 12px;
  border: 1px solid var(--line-control);
  border-radius: var(--radius);
  background: var(--panel);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.context-menu {
  position: fixed;
  z-index: 70;
  display: none;
  min-width: 120px;
  padding: 4px;
  border: 1px solid var(--line-control);
  border-radius: var(--radius);
  background: var(--panel);
}

.context-menu.is-visible {
  display: flex;
  flex-direction: column;
}

.context-menu button {
  justify-content: flex-start;
  border: 0;
  border-radius: 4px;
  background: transparent;
  text-align: left;
}

.quick-dialog {
  width: min(420px, calc(100vw - 32px));
  border: 1px solid var(--line-control);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
}

.quick-dialog::backdrop {
  background: rgba(0, 0, 0, 0.36);
}

.quick-dialog form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.quick-dialog label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quick-dialog input,
.quick-dialog select {
  height: 34px;
  padding: 0 9px;
}

.dialog-actions {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.danger-button {
  color: var(--danger);
}

.image-preview {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
  background: rgba(0, 0, 0, 0.76);
  overflow: hidden;
}

.image-preview.is-visible {
  display: block;
}

.preview-stage {
  position: absolute;
  inset: 0;
  cursor: grab;
}

.preview-stage.is-dragging {
  cursor: grabbing;
}

.preview-stage img {
  position: absolute;
  top: 50%;
  left: 50%;
  max-width: 82vw;
  max-height: 82vh;
  transform-origin: center center;
  user-select: none;
  -webkit-user-drag: none;
}

.preview-close {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 62;
  width: 36px;
  height: 36px;
  min-height: 36px;
  padding: 0;
  background: rgba(255, 255, 255, 0.92);
  color: #111111;
}

.preview-help {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 62;
  transform: translateX(-50%);
  padding: 8px 12px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  color: #111111;
  font-size: 13px;
}

@media (max-width: 980px) {
  .board {
    grid-template-columns: 12% 22% 22% 22% 22%;
  }

  .panel-header,
  .todo-heading {
    padding: 0 6px;
  }
}