:root {
  --bg: #080c0f;
  --surface: #0d1318;
  --surface2: #111820;
  --border: #1e2d3a;
  --accent: #00ff88;
  --accent2: #00c4ff;
  --accent3: #ff6b35;
  --text: #c8d8e4;
  --muted: #4a6070;
  --slot-empty: #0a1520;
  --slot-filled: #0d1f14;
  --slot-border-empty: #1e3040;
  --slot-border-filled: #00ff8844;
  --danger: #ff3b5c;
  --alert: #ed0a30;

  --cat-noun: #00c4ff;
  --cat-verb: #ff6b35;
  --cat-adj: #b084ff;
  --cat-other: #ffd060;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 24px,
      #ffffff04 24px,
      #ffffff04 25px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 24px,
      #ffffff03 24px,
      #ffffff03 25px
    );
  pointer-events: none;
  z-index: 0;
}

html,
body {
  overflow: hidden;
}
.header {
  position: relative;
  z-index: 10;
  padding: 20px 32px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.logo-name {
  font-family: sans-serif;
  font-weight: 800;
  font-size: 24px;
  color: #fff;
  letter-spacing: -0.5px;
}
.logo-name span {
  color: var(--accent);
}
.logo-tag {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 3px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s infinite;
  display: inline-block;
  margin-right: 7px;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}
.offline-badge {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 2px;
}

.main {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 300px 1fr;
  height: calc(100vh - 143px);
  overflow: hidden;
}

.pool-panel {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
}

.panel-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.panel-label {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 10px;
  user-select: none;
}

.search-wrap {
  position: relative;
}
.search-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: monospace;
  font-size: 13px;
  padding: 8px 10px 8px 30px;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.2s;
}
.search-input:focus {
  border-color: var(--accent);
}
.search-input::placeholder {
  color: var(--muted);
}
.search-icon {
  position: absolute;
  left: 9px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 11px;
}
.result-count {
  font-size: 10px;
  color: var(--muted);
  margin-top: 6px;
}
.result-count span {
  color: var(--accent);
}

.cat-tabs {
  display: flex;
  gap: 4px;
  margin-top: 10px;
  flex-wrap: wrap;
  padding: 5px 10px;
}
.cat-tab {
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-family: monospace;
  padding: 3px 9px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  transition: all 0.15s;
  user-select: none;
}
.cat-tab:hover {
  opacity: 0.85;
}
.cat-tab.active {
  font-weight: 700;
}

.cat-tab[data-cat="all"].active {
  border-color: var(--text);
  color: var(--text);
  background: #ffffff0d;
}

.cat-tab[data-cat="noun"].active {
  border-color: var(--cat-noun);
  color: var(--cat-noun);
  background: #00c4ff12;
}

.cat-tab[data-cat="verb"].active {
  border-color: var(--cat-verb);
  color: var(--cat-verb);
  background: #ff6b3512;
}

.cat-tab[data-cat="adj"].active {
  border-color: var(--cat-adj);
  color: var(--cat-adj);
  background: #b084ff12;
}

.cat-tab[data-cat="adverb"].active {
  border-color: #ff9ff3;
  color: #ff9ff3;
  background: #ff9ff320;
}

.cat-tab[data-cat="specials"].active {
  border-color: #ffd060;
  color: #ffd060;
  background: #ffd06020;
}

.cat-tab[data-cat="determiner"].active {
  border-color: #a8e6cf;
  color: #a8e6cf;
  background: #a8e6cf20;
}

.cat-tab[data-cat="preposition"].active {
  border-color: #ffccbc;
  color: #ffccbc;
  background: #ffccbc20;
}

.cat-tab[data-cat="number"].active {
  border-color: #d1c4e9;
  color: #d1c4e9;
  background: #d1c4e920;
}

.cat-tab[data-cat="plural"].active {
  border-color: #81d4fa;
  color: #81d4fa;
  background: #81d4fa20;
}

.cat-tab[data-cat="verbpast"].active {
  border-color: #ff8a65;
  color: #ff8a65;
  background: #ff8a6520;
}

.cat-tab[data-cat="verbpresent"].active {
  border-color: #ffeb3b;
  color: #ffeb3b;
  background: #ffeb3b20;
}

.cat-tab[data-cat="other"].active {
  border-color: var(--cat-other);
  color: var(--cat-other);
  background: #ffd06012;
}

.cat-tab {
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-family: monospace;
  padding: 3px 9px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  transition: all 0.15s;
  user-select: none;
}

.cat-tab:hover {
  opacity: 0.85;
  border-color: var(--accent);
}

.word-pool {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  align-content: flex-start;
}
.word-pool::-webkit-scrollbar {
  width: 3px;
}
.word-pool::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.word-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: grab;
  font-size: 11px;
  font-family: monospace;
  color: var(--text);
  transition: all 0.15s;
  user-select: none;
}
.word-chip:active {
  cursor: grabbing;
}
.word-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #00ff8808;
  transform: translateY(-1px);
}

.chip-cat {
  font-size: 7px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 1px 5px;
  border-radius: 2px;
  line-height: 1;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.chip-cat.noun {
  color: var(--cat-noun);
  background: #00c4ff18;
  border: 1px solid #00c4ff30;
}
.chip-cat.verb {
  color: var(--cat-verb);
  background: #ff6b3518;
  border: 1px solid #ff6b3530;
}
.chip-cat.adj {
  color: var(--cat-adj);
  background: #b084ff18;
  border: 1px solid #b084ff30;
}
.chip-cat.adverb {
  color: #ff9ff3;
  background: #ff9ff320;
  border-color: #ff9ff340;
}

.chip-cat.specials {
  color: #ffd060;
  background: #ffd06020;
  border-color: #ffd06040;
}

.chip-cat.determiner {
  color: #a8e6cf;
  background: #a8e6cf20;
  border-color: #a8e6cf40;
}

.chip-cat.preposition {
  color: #ffccbc;
  background: #ffccbc20;
  border-color: #ffccbc40;
}

.chip-cat.number {
  color: #d1c4e9;
  background: #d1c4e920;
  border-color: #d1c4e940;
}

.chip-cat.plural {
  color: #81d4fa;
  background: #81d4fa20;
  border-color: #81d4fa40;
}

.chip-cat.verbpast {
  color: #ff8a65;
  background: #ff8a6520;
  border-color: #ff8a6540;
}

.chip-cat.verbpresent {
  color: #ffeb3b;
  background: #ffeb3b20;
  border-color: #ffeb3b40;
}

.chip-cat.other {
  color: var(--cat-other);
  background: #ffd06020;
  border-color: #ffd06040;
}

.chip-idx {
  font-size: 8px;
  color: var(--muted);
}
.chip-use-count {
  font-size: 8px;
  font-weight: 700;
  color: var(--accent3);
  background: #ff6b3520;
  border: 1px solid #ff6b3540;
  border-radius: 3px;
  padding: 1px 3px;
  line-height: 1;
}

.builder-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.slots-wrap {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.slots-wrap::-webkit-scrollbar {
  width: 3px;
}

.slots-wrap::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.slots-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 7px;
  margin-bottom: 16px;
}

.slot {
  min-height: 70px;
  border: 1px dashed var(--slot-border-empty);
  border-radius: 6px;
  background: var(--slot-empty);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.15s;
  cursor: default;
}
.slot.drag-over {
  border-color: var(--accent);
  background: #00ff8808;
  box-shadow: 0 0 18px #00ff8812;
}
.slot.filled {
  border: 1px solid var(--slot-border-filled);
  background: var(--slot-filled);
}
.slot.slot-24 {
  border-style: solid;
  border-color: var(--accent2);
  background: #00c4ff06;
}
.slot.typing {
  border-color: var(--accent);
  background: #00ff8808;
}

.slot-num {
  position: absolute;
  top: 4px;
  left: 7px;
  font-size: 8px;
  color: var(--muted);
}
.slot.slot-24 .slot-num {
  color: var(--accent2);
}

.slot-cat-dot {
  position: absolute;
  top: 4px;
  right: 7px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
}
.slot-cat-dot.noun {
  background: var(--cat-noun);
}
.slot-cat-dot.verb {
  background: var(--cat-verb);
}
.slot-cat-dot.adj {
  background: var(--cat-adj);
}
.slot-cat-dot.other {
  background: var(--cat-other);
}

.slot-word {
  font-family: sans-serif;
  font-weight: 700;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.3px;
}
.slot-bits {
  font-size: 7px;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0.5px;
}
.slot-empty-hint {
  font-size: 8px;
  color: #1a2e3a;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.slot-remove {
  position: absolute;
  bottom: 5px;
  right: 6px;
  font-size: 15px;
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
  line-height: 1;
}
.slot.filled:hover .slot-remove {
  opacity: 1;
  color: var(--danger);
}

.slot-input-wrap {
  position: relative;
  width: 100%;
  padding: 0 6px;
}
.slot-inline-input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-family: monospace;
  font-size: 12px;
  text-align: center;
  outline: none;
  padding: 2px 0;
}
.slot-inline-input::placeholder {
  color: var(--muted);
  font-size: 10px;
}

.ac-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  width: 160px;
  background: #0d1f2a;
  border: 1px solid var(--accent);
  border-radius: 5px;
  z-index: 999;
  max-height: 180px;
  overflow-y: auto;
  box-shadow: 0 8px 24px #000a;
}
.ac-dropdown::-webkit-scrollbar {
  width: 3px;
}
.ac-dropdown::-webkit-scrollbar-thumb {
  background: var(--border);
}

.ac-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 11px;
  font-family: monospace;
  color: var(--text);
  border-bottom: 1px solid #1a2a35;
  transition: background 0.1s;
}
.ac-item:last-child {
  border-bottom: none;
}
.ac-item:hover,
.ac-item.ac-selected {
  background: #00ff8812;
  color: var(--accent);
}
.ac-item-word {
  font-weight: 700;
}
.ac-item-idx {
  font-size: 8px;
  color: var(--muted);
}
.ac-item-cat {
  font-size: 7px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 1px 4px;
  border-radius: 2px;
  line-height: 1;
  margin-left: auto;
}
.ac-item-cat.noun {
  color: var(--cat-noun);
  background: #00c4ff18;
}
.ac-item-cat.verb {
  color: var(--cat-verb);
  background: #ff6b3518;
}
.ac-item-cat.adj {
  color: var(--cat-adj);
  background: #b084ff18;
}
.ac-item-cat.other {
  color: var(--cat-other);
  background: #ffd06018;
}

.candidate-section {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  max-height: 280px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.candidate-label {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.candidate-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
.candidates-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 200px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 6px;
  background: #0a1a1f;
  border-radius: 16px;
  margin-top: 6px;
}

.candidates-row::-webkit-scrollbar {
  width: 4px;
}

.candidates-row::-webkit-scrollbar-track {
  background: #1a2a35;
  border-radius: 4px;
}
.candidates-row::-webkit-scrollbar-thumb {
  background: var(--accent2);
  border-radius: 4px;
}
.candidate-chip {
  padding: 4px 10px;
  font-size: 10px;
}
.candidate-chip.active {
  cursor: pointer;
  color: var(--accent2);
  border-color: var(--accent2);
  background: #00c4ff08;
}
.candidate-chip.active:hover {
  background: #00c4ff14;
  box-shadow: 0 0 14px #00c4ff20;
}
.candidate-chip.selected {
  background: var(--accent2);
  color: #000;
  font-weight: 700;
  border-color: var(--accent2);
}
.candidate-idx {
  font-size: 8px;
  margin-right: 3px;
  opacity: 0.6;
}

.bit-strip-section {
  padding: 15px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.bit-strip-label {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 7px;
  user-select: none;
}
.bit-strip {
  display: flex;
  gap: 1px;
  flex-wrap: wrap;
}
.bit {
  width: 7px;
  height: 12px;
  border-radius: 1px;
  background: #0d1820;
  border: 1px solid #1a2a35;
  transition: all 0.1s;
}
.bit.b1 {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 4px var(--accent);
}
.bit.b0 {
  background: #0a1e14;
  border-color: #1a3a24;
}
.bit.b1.checksum {
  background: var(--accent2);
  border-color: var(--accent2);
  box-shadow: 0 0 4px var(--accent2);
}
.bit.checksum {
  background: #003355;
  border-color: var(--accent2);
}
.bit-group-sep {
  width: 2px;
  flex-shrink: 0;
}

.progress-section {
  padding: 8px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  flex-shrink: 0;
}
.progress-bar-wrap {
  flex: 1;
  height: 2px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  transition: width 0.3s ease;
  width: 0%;
}
.progress-text {
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}
.progress-text span {
  color: var(--accent);
}

.output-section {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface2);
  display: none;
}
.output-section.visible {
  display: block;
}
.output-label {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.seed-phrase {
  font-family: monospace;
  font-size: 11px;
  color: var(--text);
  line-height: 1.9;
  letter-spacing: 0.3px;
}
.seed-word {
  display: inline-block;
  margin-right: 4px;
}
.seed-word .sw-num {
  font-size: 8px;
  color: var(--muted);
  margin-right: 2px;
}
.seed-word .sw-word {
  color: var(--accent);
}
.output-actions {
  margin-top: 8px;
  display: flex;
  gap: 7px;
}
.btn {
  padding: 6px 14px;
  font-family: monospace;
  font-size: 10px;
  letter-spacing: 1px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid;
  transition: all 0.15s;
  text-transform: uppercase;
}
.btn-copy {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.btn-copy:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.btn-reset {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.btn-reset:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.dragging {
  opacity: 0.4;
  transform: scale(0.95);
}
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 1px;
  text-align: center;
  gap: 6px;
}

.mode-btn {
  background: transparent;
  border: none;
  color: #8aaec0;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 6px 20px;
  border-radius: 32px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: monospace;
}

.bit {
  width: 7px;
  height: 12px;
  font-size: 6px;
  line-height: 12px;
  text-align: center;
  font-family: monospace;
}

.mode-switch-bar {
  display: flex;
  gap: 4px;
  padding: 8px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.mode-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 700;
}

.offline-badge {
  font-size: 15px;
  color: var(--alert);
  letter-spacing: 2px;
  display: flex;
  font-weight: bold;
  align-items: center;
  gap: 6px;
}

.offline-badge-link {
  color: var(--alert);
  text-decoration: underline;
  text-underline-offset: 3px;
  letter-spacing: 2px;
  transition: color 0.15s;
}

.offline-badge-link:hover {
  color: #fff;
}