.board-viewport {
  position: relative;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.48), rgba(247, 246, 242, 0.75)),
    var(--color-surface-soft);
  box-shadow: var(--shadow-sm);
  isolation: isolate;
}

.board-background {
  position: absolute;
  inset: 0;
  z-index: 0;
  will-change: background-position, background-size;
  background-image:
    linear-gradient(rgba(37, 37, 32, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 37, 32, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black, transparent 82%);
  pointer-events: none;
}

.board-viewport::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(119, 104, 246, 0.08), transparent 24rem),
    radial-gradient(circle at 78% 74%, rgba(255, 196, 116, 0.1), transparent 22rem);
  pointer-events: none;
}

.connection-layer {
  position: absolute;
  inset: 0;
  z-index: var(--z-board);
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.board-canvas {
  position: absolute;
  inset: 0;
  will-change: transform;
  z-index: calc(var(--z-board) + 1);
  min-width: 100%;
  min-height: 100%;
  transform-origin: 0 0;
  outline: none;
}

.viewport-controls {
  position: absolute;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: var(--z-floating);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--surface-glass-2);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}

.viewport-controls[hidden] {
  display: none;
}

.board-viewport.is-viewport-static .board-background {
  background-position: 0 0 !important;
  background-size: 28px 28px !important;
}

.viewport-controls__value {
  min-width: 4.4rem;
  min-height: 2.35rem;
  padding: 0 var(--space-3);
  border: 1px solid var(--color-border);
  background: rgba(247, 246, 242, 0.74);
  color: var(--color-text-soft);
  font-size: 0.8rem;
  font-weight: 850;
}

.viewport-controls__value:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.idea-block {
  position: absolute;
  width: 260px;
  min-height: 140px;
  padding: var(--space-4);
  border: 1px solid rgba(37, 37, 32, 0.12);
  border-radius: var(--radius-lg);
  background: var(--note-yellow);
  box-shadow: var(--shadow-sm);
  cursor: grab;
  user-select: none;
  position: absolute;
  overflow: hidden;
  touch-action: none;
  will-change: left, top, transform;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

.idea-block:hover {
  transform: translateY(-1px);
  border-color: rgba(37, 37, 32, 0.16);
  box-shadow: var(--shadow-sm);
}

.idea-block.is-selected {
  border-color: var(--accent-border-strong);
  box-shadow:
    var(--accent-ring-strong),
    var(--shadow-md);
}

.idea-block:focus-visible {
  border-color: var(--accent-border-strong);
  box-shadow:
    var(--focus-ring),
    var(--shadow-sm);
}

.idea-block:active {
  cursor: grabbing;
}

.idea-block__type {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
  color: rgba(37, 37, 32, 0.58);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.idea-block__title {
  width: 100%;
  max-width: 100%;
  margin-bottom: var(--space-2);
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 850;
  line-height: 1.2;
  letter-spacing: -0.025em;

  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: normal;
}

.idea-block__content {
  width: 100%;
  max-width: 100%;
  color: rgba(37, 37, 32, 0.74);
  font-size: 0.88rem;
  line-height: 1.45;

  overflow-wrap: anywhere;
  word-break: break-word;
  white-space: pre-wrap;
}

.idea-block__title,
.idea-block__content {
  border-radius: var(--radius-sm);
}

.idea-block__title[contenteditable="true"],
.idea-block__content[contenteditable="true"] {
  cursor: text;
  user-select: text;
  outline: none;
}

.idea-block__title.is-editing,
.idea-block__content.is-editing {
  padding: 0.25rem 0.4rem;
  margin-left: -0.4rem;
  margin-right: -0.4rem;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 0 0 3px var(--app-bg-wash-1);
}

.idea-block__title:hover,
.idea-block__content:hover {
  background: rgba(255, 255, 255, 0.28);
}

.idea-block [data-editable-field] {
  cursor: text;
}

.idea-block[data-type="task"] {
  background: var(--note-green);
}

.idea-block[data-type="reference"] {
  background: var(--note-blue);
}

.idea-block[data-type="goal"] {
  background: var(--note-orange);
}

.idea-block[data-type="quote"] {
  background: var(--note-pink);
}

.idea-block[data-type="link"] {
  background: var(--note-purple);
}

.idea-block.is-dragging {
  z-index: 20;
  cursor: grabbing;
  transform: rotate(-1deg) scale(1.015);
  box-shadow: var(--shadow-lg);
  transition: box-shadow var(--transition-fast);
}

body.is-dragging-block {
  cursor: grabbing;
}

body.is-space-panning .board-viewport {
  cursor: grab;
}

body.is-panning-board,
body.is-panning-board * {
  cursor: grabbing !important;
  user-select: none !important;
}

body.is-space-panning .idea-block {
  cursor: grab;
}

.idea-block__resize-handle {
  position: absolute;
  right: 0.5rem;
  bottom: 0.5rem;
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 0.55rem;
  background:
    linear-gradient(135deg, transparent 0 42%, var(--surface-overlay) 42% 50%, transparent 50% 100%),
    linear-gradient(135deg, transparent 0 60%, rgba(37, 37, 32, 0.18) 60% 68%, transparent 68% 100%);
  opacity: 0.12;
  cursor: nwse-resize;
  transition:
    opacity var(--transition-fast),
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.idea-block:hover .idea-block__resize-handle,
.idea-block.is-selected .idea-block__resize-handle,
.idea-block.is-resizing .idea-block__resize-handle {
  opacity: 1;
}

.idea-block__resize-handle:hover {
  background-color: rgba(255, 255, 255, 0.48);
  opacity: 1;
  transform: scale(1.06);
}

.idea-block.is-resizing {
  z-index: 25;
  box-shadow:
    var(--accent-ring-strong),
    var(--shadow-lg);
}

.idea-block[data-color="yellow"] {
  background: var(--note-yellow);
}

.idea-block[data-color="blue"] {
  background: var(--note-blue);
}

.idea-block[data-color="green"] {
  background: var(--note-green);
}

.idea-block[data-color="pink"] {
  background: var(--note-pink);
}

.idea-block[data-color="orange"] {
  background: var(--note-orange);
}

.idea-block[data-color="purple"] {
  background: var(--note-purple);
}

.idea-block[data-color="white"] {
  background: var(--note-white);
}

body.is-resizing-block,
body.is-resizing-block * {
  cursor: nwse-resize !important;
  user-select: none !important;
}

.idea-block__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: var(--space-3);
  padding-bottom: 0.35rem;
}

.idea-block__tag {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  min-height: 1.35rem;
  padding: 0 0.45rem;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.42);
  color: rgba(37, 37, 32, 0.62);
  font-size: 0.68rem;
  font-weight: 850;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.idea-block__tag--extra {
  color: var(--color-primary);
}

.idea-block__link-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.46);
}

.idea-block__link-domain {
  min-width: 0;
  overflow: hidden;
  color: rgba(37, 37, 32, 0.7);
  font-size: 0.76rem;
  font-weight: 850;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.idea-block__link-open {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.65rem;
  padding: 0 0.55rem;
  border-radius: var(--radius-full);
  background: var(--border-subtle);
  color: var(--color-text);
  font-size: 0.72rem;
  font-weight: 900;
  transition:
    background var(--transition-fast),
    transform var(--transition-fast);
}

.idea-block__link-open:hover {
  transform: translateY(-1px);
  background: rgba(37, 37, 32, 0.14);
}

.idea-block[data-type="task"][data-status="done"] {
  opacity: 0.78;
}

.idea-block[data-type="task"][data-status="done"] .idea-block__title,
.idea-block[data-type="task"][data-status="done"] .idea-block__content {
  text-decoration: line-through;
  text-decoration-thickness: 2px;
  text-decoration-color: rgba(37, 37, 32, 0.28);
}

.idea-block__title-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.idea-block__title-row .idea-block__title {
  margin-bottom: 0;
}

.idea-block__task-check {
  width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.08rem;
  accent-color: var(--color-success);
  cursor: pointer;
}

.idea-block__task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: var(--space-3);
}

.task-chip {
  display: inline-flex;
  align-items: center;
  min-height: 1.45rem;
  padding: 0 0.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.42);
  color: rgba(37, 37, 32, 0.68);
  font-size: 0.68rem;
  font-weight: 900;
  line-height: 1;
}

.task-chip--priority.task-chip--low {
  color: var(--color-success);
}

.task-chip--priority.task-chip--medium {
  color: var(--color-warning);
}

.task-chip--priority.task-chip--high {
  color: var(--color-danger);
}

.task-chip--date.is-overdue {
  border-color: var(--danger-border);
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

html[data-theme="dark"] .board-viewport {
  background:
    linear-gradient(180deg, rgba(25, 28, 32, 0.72), rgba(16, 18, 20, 0.92)),
    var(--color-surface-soft);
}

html[data-theme="dark"] .board-background {
  background-image:
    linear-gradient(rgba(245, 241, 232, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 241, 232, 0.055) 1px, transparent 1px);
}

html[data-theme="dark"] .board-viewport::before {
  background:
    radial-gradient(circle at 20% 20%, var(--accent-tint), transparent 24rem),
    radial-gradient(circle at 78% 74%, rgba(82, 168, 142, 0.08), transparent 22rem);
}

html[data-theme="dark"] .viewport-controls,
html[data-theme="dark"] .viewport-controls__value {
  background: var(--surface-glass-4);
}

html[data-theme="dark"] .idea-block {
  border-color: var(--color-border);
}

html[data-theme="dark"] .idea-block__type,
html[data-theme="dark"] .idea-block__content,
html[data-theme="dark"] .idea-block__tag,
html[data-theme="dark"] .idea-block__link-domain,
html[data-theme="dark"] .task-chip {
  color: var(--color-text-soft);
}

html[data-theme="dark"] .idea-block__title.is-editing,
html[data-theme="dark"] .idea-block__content.is-editing,
html[data-theme="dark"] .idea-block__title:hover,
html[data-theme="dark"] .idea-block__content:hover,
html[data-theme="dark"] .idea-block__tag,
html[data-theme="dark"] .idea-block__link-preview,
html[data-theme="dark"] .task-chip {
  background: rgba(255, 255, 255, 0.06);
}

html[data-theme="dark"] .idea-block__link-open {
  background: rgba(255, 255, 255, 0.1);
}

html[data-theme="dark"] .idea-block__link-open:hover {
  background: rgba(255, 255, 255, 0.16);
}

html[data-theme="dark"] .idea-block[data-type="task"][data-status="done"] .idea-block__title,
html[data-theme="dark"] .idea-block[data-type="task"][data-status="done"] .idea-block__content {
  text-decoration-color: rgba(245, 241, 232, 0.34);
}

@media (max-width: 560px) {
  .viewport-controls {
    right: var(--space-3);
    bottom: var(--space-3);
    gap: var(--space-1);
    padding: var(--space-1);
    transform: scale(0.9);
    transform-origin: bottom right;
  }

  .viewport-controls__value {
    min-width: 3.6rem;
    padding: 0 var(--space-2);
  }
}