.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.tool-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: inherit;
  text-decoration: none;
  min-height: 100%;
}

.tool-card:hover {
  border-color: #c8d2cb;
  color: inherit;
}

.tool-card-body { flex: 1; min-width: 0; }
.tool-card-link { color: var(--color-ink); text-decoration: none; }
.tool-card-link::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.tool-card { position: relative; }
.favorite-button { position: absolute; top: var(--space-4); right: var(--space-4); z-index: 2; margin-left: 0; border: 0; background: transparent; color: var(--color-accent); min-width: 44px; min-height: 44px; font-size: 1.35rem; cursor: pointer; }
.heading-link { color: var(--color-ink); text-decoration: none; }
.personalized-tools [data-recent-section] { margin-top: var(--space-6); }
.processing-note { margin-top: var(--space-3); color: var(--color-muted); }
.content-grid { display: grid; gap: var(--space-6); }
.client-tool-output { white-space: pre-wrap; overflow-wrap: anywhere; }
.client-tool textarea { max-width: none; }
.client-result-value { font-size: 1.5rem; font-weight: 700; color: var(--color-accent); overflow-wrap: anywhere; }
.color-preview { min-height: 120px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); }
.palette { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); margin-top: var(--space-4); }
.palette-swatch { min-height: 100px; display: flex; align-items: end; padding: var(--space-2); color: #fff; text-shadow: 0 1px 2px #000; }
.timer-display { font-size: clamp(2.5rem, 12vw, 5rem); font-variant-numeric: tabular-nums; text-align: center; margin: var(--space-5) 0; }
.option-group { display: flex; flex-wrap: wrap; gap: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: var(--space-4); }
.option-group legend { font-weight: 600; padding: 0 var(--space-2); }
.interactive-list li { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); border-bottom: 1px solid var(--color-border); padding: var(--space-2) 0; }
.interactive-list label { display: flex; align-items: center; gap: var(--space-3); min-width: 0; }
.interactive-list .completed { text-decoration: line-through; color: var(--color-muted); }
.habit-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--space-4); margin-top: var(--space-5); }
.habit-grid .btn { margin: var(--space-2); }
.notes-area { min-height: 24rem; max-width: none; }
.favicon-preview { width: 160px; height: 160px; border-radius: 24px; }
.canvas-wrap { margin-top: var(--space-5); }
.canvas-wrap canvas { display: block; max-width: 100%; height: auto; border: 1px solid var(--color-border); border-radius: var(--radius-sm); cursor: crosshair; }
.color-chip { width: 100%; min-height: 80px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); }
.info-list { display: grid; grid-template-columns: max-content 1fr; gap: var(--space-2) var(--space-4); }
.info-list dt { font-weight: 600; }
.info-list dd { margin: 0; overflow-wrap: anywhere; }

@media (min-width: 768px) { .content-grid { grid-template-columns: 1fr 1fr; } }

.tool-card-icon {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  display: grid;
  place-items: center;
}

.tool-card-icon img {
  width: 30px;
  height: 30px;
}

:root[data-theme="dark"] .tool-card-icon img {
  filter: brightness(0) saturate(100%) invert(82%) sepia(19%) saturate(1017%) hue-rotate(108deg) brightness(92%) contrast(90%);
}

.tool-card-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-right: 2.75rem;
  margin-bottom: var(--space-2);
}

.tool-card-body p {
  color: var(--color-muted);
}

.tool-card-meta {
  margin-top: var(--space-3);
  font-size: 0.85rem;
}

/* PDF cards use operation-specific artwork and a compact top-to-bottom rhythm. */
.tool-card[data-category="pdf & documents"] {
  display: block;
  padding: var(--space-5);
}

.tool-card[data-category="pdf & documents"] .tool-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
}

.tool-card[data-category="pdf & documents"] .tool-card-icon img {
  width: 30px;
  height: 30px;
}

.tool-card[data-category="pdf & documents"] .tool-card-heading {
  padding-right: 2.75rem;
}

.tool-card[data-category="pdf & documents"] .favorite-button {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  margin-left: 0;
}

.tool-card[data-category="pdf & documents"] .tool-card-body > p:not(.tool-card-meta) {
  line-height: 1.5;
}

.category-block + .category-block {
  margin-top: var(--space-7);
}

.tool-layout {
  display: grid;
  gap: var(--space-5);
  min-width: 0;
}

.tool-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-5);
  box-shadow: var(--shadow);
  min-width: 0;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.file-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.file-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

@media (min-width: 768px) {
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- Field layout ---- */

.field {
  margin-bottom: var(--space-4);
}

.field:last-child {
  margin-bottom: 0;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.field-grid .field {
  margin-bottom: 0;
}

/* ---- Tool width variants ---- */

.tool-wide {
  max-width: 56rem;
}

.tool-standard {
  max-width: 40rem;
}

/* ---- Spinner ---- */

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation-duration: 1.5s;
  }

  .chart-bar {
    transition: none;
  }
}

/* ---- Preview ---- */

.preview-row {
  margin: var(--space-4) 0;
}

.preview-row img {
  max-width: 100%;
  border-radius: var(--radius-sm);
}

.preview-row figure {
  margin: 0;
}

.preview-row figcaption {
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.checkerboard {
  background-image:
    linear-gradient(45deg, #e8e8e8 25%, transparent 25%),
    linear-gradient(-45deg, #e8e8e8 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e8e8e8 75%),
    linear-gradient(-45deg, transparent 75%, #e8e8e8 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}

/* ---- File controls ---- */

.file-name {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.file-size {
  white-space: nowrap;
}

.file-controls {
  display: flex;
  gap: var(--space-1);
  flex-shrink: 0;
}

.file-list-item.dragging {
  opacity: 0.5;
}

/* ---- Thumbnail list (GIF) ---- */

.thumb-list {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--space-3);
}

.thumb-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  text-align: center;
  cursor: grab;
}

.thumb-item.dragging {
  opacity: 0.5;
}

.thumb-img {
  width: 100%;
  height: 80px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: var(--space-2);
}

.thumb-label {
  display: block;
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: var(--space-2);
}

.thumb-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-1);
}

.thumb-controls .btn {
  min-height: 32px;
  padding: 0 0.5rem;
  font-size: 0.85rem;
}

/* ---- Typing Speed Test ---- */

.typing-timer {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin: var(--space-4) 0;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.typing-passage {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.1rem;
  line-height: 1.8;
  padding: var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
  min-height: 6rem;
  word-wrap: break-word;
  user-select: none;
}

.typing-passage .correct {
  color: var(--color-accent);
}

.typing-passage .incorrect {
  color: var(--color-danger);
  text-decoration: underline;
}

.typing-passage .current {
  background: var(--color-accent-soft);
  border-bottom: 2px solid var(--color-accent);
}

.typing-input {
  font-family: 'Courier New', Courier, monospace;
  font-size: 1rem;
}

.stat-row {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: var(--space-4) 0;
  padding: 0;
  flex-wrap: wrap;
}

.stat-row li {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-size: 0.9rem;
  color: var(--color-muted);
}

.stat-row strong {
  font-size: 1.25rem;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

/* ---- Expense Tracker ---- */

.expense-app h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-4);
}

.expense-app h2:first-of-type {
  margin-top: var(--space-5);
}

.expense-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.expense-toolbar .field {
  margin-bottom: 0;
  min-width: 140px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: var(--space-2);
  font-variant-numeric: tabular-nums;
}

.directory-categories {
  margin-top: var(--space-4);
}

.stat-value-small {
  font-size: 1rem;
}

.stat-value.positive {
  color: var(--color-accent);
}

.stat-value.negative {
  color: var(--color-danger);
}

/* Data table */
.table-wrap {
  overflow-x: auto;
  max-width: 100%;
  margin: var(--space-4) 0;
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table th {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.data-table .amount-income {
  color: var(--color-accent);
  font-weight: 600;
}

.data-table .amount-expense {
  color: var(--color-danger);
  font-weight: 600;
}

.data-table .row-actions {
  display: flex;
  gap: var(--space-2);
}

.data-table .row-actions .btn {
  min-height: 32px;
  padding: 0 0.6rem;
  font-size: 0.8rem;
}

/* Category chart */
.chart {
  margin: var(--space-4) 0;
}

.chart-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.chart-label {
  min-width: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  text-align: right;
  flex-shrink: 0;
}

.chart-bar-wrap {
  flex: 1;
  height: 24px;
  background: var(--color-bg);
  border-radius: 4px;
  overflow: hidden;
}

.chart-bar {
  height: 100%;
  background: var(--color-accent);
  border-radius: 4px;
  transition: width 0.3s ease;
  min-width: 2px;
}

.chart-amount {
  min-width: 70px;
  font-size: 0.85rem;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.chart-empty {
  text-align: center;
  color: var(--color-muted);
  padding: var(--space-4);
}

/* File button wrapper */
.file-btn {
  cursor: pointer;
}

/* Plain list */
.plain-list {
  list-style: disc;
  padding-left: 1.5rem;
  margin: var(--space-3) 0;
  line-height: 1.8;
}

.plain-list li + li {
  margin-top: var(--space-2);
}

/* Related tools grid */
.tool-grid-related {
  grid-template-columns: 1fr;
}

/* ---- PDF visual workspace ---- */

.options-panel { margin-top: var(--space-5); padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg); }
.advanced-options { margin-top: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-bg); }
.advanced-options summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; padding: 0 var(--space-4); font-weight: 650; color: var(--color-muted); }
.advanced-options[open] { padding-bottom: var(--space-4); }
.advanced-options[open] summary { margin-bottom: var(--space-3); }
.advanced-options > .field, .advanced-options > .field-grid, .advanced-options > .field-hint { margin-inline: var(--space-4); }
.conversion-note { margin-top: var(--space-5); }

.pdf-page-manager { margin-top: var(--space-5); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.pdf-manager-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: start; gap: var(--space-3); }
.pdf-manager-heading h2 { margin-bottom: var(--space-2); }
.pdf-page-toolbar { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-4) 0 var(--space-2); }
.pdf-selection-status { color: var(--color-muted); margin-bottom: var(--space-4); }
.pdf-page-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
.pdf-page-card { min-width: 0; border: 2px solid var(--color-border); border-radius: var(--radius-sm); padding: var(--space-2); background: var(--color-surface); transition: border-color 120ms ease, box-shadow 120ms ease; }
.pdf-page-card.is-selected { border-color: var(--color-accent); box-shadow: 0 0 0 1px var(--color-accent); }
.pdf-page-card.dragging { opacity: 0.55; }
.pdf-page-image-wrap { display: grid; place-items: center; height: 180px; overflow: hidden; border-radius: 5px; background: #e9ece9; }
:root[data-theme="dark"] .pdf-page-image-wrap { background: #0d1210; }
.pdf-page-image-wrap img { max-width: 100%; max-height: 165px; width: auto; height: auto; object-fit: contain; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18); transition: transform 160ms ease; }
.pdf-page-card-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); margin-top: var(--space-2); }
.pdf-selected-label { font-size: 0.72rem; font-weight: 700; color: var(--color-muted); }
.pdf-page-card.is-selected .pdf-selected-label { color: var(--color-accent); }
.pdf-page-controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1); margin-top: var(--space-2); }
.pdf-page-controls .btn { min-height: 34px; padding: 0 0.55rem; font-size: 0.78rem; }
.btn-page-select { background: var(--color-bg); color: var(--color-ink); border-color: var(--color-border); }
.btn-page-select[aria-pressed="true"]::before { content: "\2713"; margin-right: 0.3rem; font-weight: 800; }
.pdf-drag-handle { width: 100%; color: var(--color-muted); font-size: 0.75rem; cursor: grab; }
.pdf-preview-limit { margin-top: var(--space-4); }

.pdf-merge-file { display: block; padding: 0; overflow: hidden; }
.pdf-merge-file-head { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3); }
.pdf-file-grip { flex: 0 0 30px; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--color-accent-soft); color: var(--color-accent); font-weight: 750; cursor: grab; }
.pdf-merge-file-info { display: grid; flex: 1; min-width: 0; }
.pdf-merge-preview { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); padding: var(--space-3); border-top: 1px solid var(--color-border); background: var(--color-bg); }
.pdf-merge-preview figure { margin: 0; text-align: center; }
.pdf-merge-preview img { height: 120px; width: 100%; object-fit: contain; background: var(--color-surface); }
.pdf-merge-preview figcaption { font-size: 0.78rem; margin-top: var(--space-1); color: var(--color-muted); }
.pdf-merge-preview > .muted { grid-column: 1 / -1; }
.pdf-directory .category-block + .category-block { margin-top: var(--space-7); }

@media (min-width: 600px) {
  .pdf-page-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pdf-merge-preview { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .tool-grid-related { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pdf-page-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .tool-grid-related { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .tool-grid-related .tool-card { display: block; padding: var(--space-4); }
  .tool-grid-related .tool-card-icon { margin-bottom: var(--space-3); }
  .tool-grid-related .favorite-button { position: absolute; top: var(--space-2); right: var(--space-2); }
  .tool-grid-related .tool-card-meta { display: none; }
  .pdf-page-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

/* ---- Responsive adjustments ---- */

@media (max-width: 767px) {
  .file-list-item, .pdf-merge-file-head { align-items: flex-start; flex-wrap: wrap; }
  .file-controls { width: 100%; overflow-x: auto; }
  .sticky-tool-actions { position: sticky; bottom: 0; z-index: 5; margin-inline: calc(var(--space-5) * -1); padding: var(--space-3) var(--space-5); background: var(--color-surface); border-top: 1px solid var(--color-border); }
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .stat-row {
    gap: var(--space-3);
  }

  .thumb-list {
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  }

  .data-table th:nth-child(4),
  .data-table td:nth-child(4) {
    display: none;
  }

  .chart-label {
    min-width: 70px;
    font-size: 0.8rem;
  }

  .typing-passage {
    font-size: 0.95rem;
    padding: var(--space-4);
  }
}

@media (max-width: 375px) {
  .field-grid {
    grid-template-columns: 1fr;
  }

  .expense-toolbar {
    flex-direction: column;
  }

  .stat-row li {
    font-size: 0.8rem;
  }

  .stat-row strong {
    font-size: 1rem;
  }
}