/* Embedded Toolbox styles reusing shared theme tokens from base.css & site.css */
.kb-tool-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 24px;
  margin-bottom: 20px;
  border: 1px solid var(--glass-edge);
  border-radius: 20px;
  background: var(--raised-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  box-shadow: var(--panel-bevel), var(--shadow-small);
  color: var(--accent-dark);
  transition: transform 0.2s var(--ease-spring), border-color 0.2s ease, box-shadow 0.2s ease;
}
.kb-tool-entry:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--panel-bevel), var(--shadow);
}
.kb-tool-entry strong { display: block; color: var(--ink); font-size: 18px; }
.kb-tool-entry small { display: block; margin-top: 6px; color: var(--muted); font-size: 12.5px; }

/* iOS 18 Segmented Pill Nav Bar */
.tools-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid var(--glass-edge);
  border-radius: 9999px;
  width: fit-content;
  margin: 0 auto 32px;
  position: sticky;
  top: 76px;
  z-index: 30;
  background: var(--raised-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  box-shadow: var(--panel-bevel), var(--shadow);
  max-width: 100%;
}

.tools-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 6px 16px;
  border: 1px solid transparent;
  border-radius: 9999px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s var(--ease-spring);
}

.tools-tab-btn:hover {
  color: var(--ink);
  background: rgba(120, 120, 128, 0.08);
}

.tools-tab-btn:active,
.tools-tab-btn[aria-current="location"] {
  border-color: var(--glass-edge);
  background: var(--panel);
  color: var(--accent-dark);
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
}

.tools-tab-num {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  opacity: 0.8;
}

.tool-section {
  scroll-margin-top: 145px;
}

.tool-section + .tool-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.tool-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.tool-header h2 {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif;
  font-size: 24px;
  letter-spacing: -0.025em;
  font-weight: 750;
  color: var(--ink);
}

.tool-header p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  width: 100%;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.tool-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

/* iOS 18 Bento Widget Card */
.tool-card {
  padding: 24px 26px;
  border: 1px solid var(--glass-edge);
  border-radius: 22px;
  background: var(--raised-bg);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  box-shadow: var(--panel-bevel), var(--shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tool-card-full {
  grid-column: 1 / -1;
}

.tool-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--ink);
}

.tool-field {
  margin-bottom: 14px;
}

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

.tool-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.tool-label {
  font-size: 12px;
  font-weight: 650;
  color: var(--muted);
}

.tool-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* iOS 18 Text Inputs */
.tool-input,
.tool-select,
.tool-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  transition: all 0.18s ease;
}

.tool-textarea {
  min-height: 84px;
  resize: vertical;
}

.tool-input:focus,
.tool-select:focus,
.tool-textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3.5px rgba(0, 122, 255, 0.22);
}

.tool-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 12px;
  margin-bottom: 14px;
}

.tool-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

/* iOS 18 Capsule Buttons */
.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 16px;
  border: 1px solid var(--line);
  border-radius: 9999px;
  background: var(--panel);
  color: var(--ink);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--panel-bevel), 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: all 0.18s var(--ease-spring);
}

.tool-btn:hover {
  border-color: var(--accent);
  background: var(--soft);
  color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: var(--panel-bevel), 0 3px 8px rgba(0, 0, 0, 0.08);
}

.tool-btn:active {
  transform: scale(0.96) translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.12);
}

.tool-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.28);
}

.tool-btn.primary:hover {
  opacity: 0.95;
  color: var(--on-accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

.tool-btn.primary:active {
  transform: scale(0.96) translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.25);
}

.copy-mini {
  padding: 3px 12px;
  min-height: 24px;
  font-size: 11px;
  font-family: ui-monospace, Consolas, monospace;
}

.kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}

.kv-table th,
.kv-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

.kv-table tr:last-child th,
.kv-table tr:last-child td {
  border-bottom: 0;
}

.kv-table th {
  color: var(--muted);
  font-weight: 600;
  width: 36%;
}

.kv-table td {
  font-family: ui-monospace, Consolas, monospace;
  color: var(--ink);
  word-break: break-all;
}

/* 32-bit Bitfield Grid */
.bit-grid-wrap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.byte-group {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px;
  background: var(--paper);
}

.byte-group-head {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--muted);
  margin-bottom: 8px;
}

.byte-bits {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
}

.bit-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4px 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-mono);
  cursor: pointer;
  user-select: none;
  min-height: 40px;
  transition: all 0.14s ease;
}

.bit-cell:hover {
  border-color: var(--accent);
}

.bit-cell .bit-idx {
  font-size: 9px;
  line-height: 1.1;
  opacity: 0.75;
}

.bit-cell .bit-val {
  font-size: 13px;
  font-weight: 750;
  line-height: 1.2;
  color: var(--ink);
}

.bit-cell[aria-pressed="true"] {
  background: var(--soft);
  border-color: var(--accent-dark);
}

.bit-cell[aria-pressed="true"] .bit-val {
  color: var(--accent-dark);
}

.bit-cell.in-slice {
  box-shadow: inset 0 -3px 0 var(--warm);
}

.code-output {
  margin: 12px 0 0;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--code-bg);
  color: var(--code-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.fault-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.fault-item {
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.fault-item.is-fault {
  border-left: 4px solid var(--note);
}

.fault-item.is-ok {
  border-left: 4px solid var(--accent-dark);
}

.fault-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 4px;
}

.fault-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 10.5px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  background: var(--soft);
  color: var(--accent-dark);
}

.fault-desc {
  margin: 0;
  font-size: 12.5px;
  color: var(--body-copy);
  line-height: 1.65;
}

/* Color swatch & Pixel editor */
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 14px 0;
}

.swatch-box {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow-small);
}

.swatch-color {
  height: 52px;
  width: 100%;
  border-bottom: 1px solid var(--line);
}

.swatch-meta {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.45;
}

.pixel-canvas-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.pixel-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  padding: 1px;
  border-radius: 8px;
  user-select: none;
  touch-action: none;
}

.pixel-cell {
  width: 15px;
  height: 15px;
  background: var(--paper);
  border: 0;
  padding: 0;
  cursor: pointer;
}

.pixel-cell.on {
  background: var(--accent-dark);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 10px;
  border-radius: 9999px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.2;
  text-align: center;
}

.status-pill.ok {
  background: var(--soft);
  color: var(--accent-dark);
}

.status-pill.warn {
  background: rgba(217, 130, 43, 0.16);
  color: var(--warm);
}

.status-pill.err {
  background: rgba(188, 88, 39, 0.16);
  color: var(--note);
}

@media (max-width: 920px) {
  .tool-grid,
  .tool-grid-3 {
    grid-template-columns: 1fr;
  }
  .bit-grid-wrap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .tools-nav {
    position: static;
  }
}

@media (max-width: 560px) {
  .tool-card { padding: 18px 14px; min-width: 0; }
  .tool-card h3 { flex-wrap: wrap; }
  .tool-input, .tool-select, .tool-textarea { font-size: 16px; }
  .tools-tab-btn, .tool-btn { min-height: 44px; }
  .tools-nav { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; overscroll-behavior-x: contain; }
  .tools-tab-btn { flex-shrink: 0; }
  .bit-grid-wrap,
  .swatch-grid {
    grid-template-columns: 1fr;
  }
  .pixel-cell {
    width: 12px;
    height: 12px;
  }
}

.kb-tool-entry,
.tool-card {
  position: relative;
  overflow: hidden;
  background: var(--raised-bg);
  border-color: var(--glass-edge);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  box-shadow: var(--panel-bevel), var(--shadow-small);
  transition:
    transform 0.38s var(--ease-spring),
    border-color 0.24s ease,
    box-shadow 0.28s var(--ease-spring);
}

@media (hover: hover) {
  .tool-card:hover,
  .kb-tool-entry:hover {
    transform: translateY(-2px);
    box-shadow: var(--panel-bevel), var(--shadow);
  }
}

.tools-tab-btn,
.tool-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.2;
}

.tools-tab-btn,
.tool-btn,
.bit-cell {
  transition:
    transform 0.36s var(--ease-spring-bounce),
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.22s var(--ease-spring);
}

@media (hover: hover) {
  .tools-tab-btn:hover,
  .tool-btn:hover {
    transform: translateY(-2px) scale(1.03);
  }
}

.tools-tab-btn:active,
.tools-tab-btn.is-pressing,
.tool-btn:active,
.tool-btn.is-pressing,
.bit-cell:active {
  transform: scale(0.92) !important;
  transition-duration: 80ms !important;
}