@charset "UTF-8";
:root {
  --cl-bg: #0b0e14;
  --cl-panel: #0f1319;
  --cl-panel-2: #141820;
  --cl-border: rgba(255, 255, 255, 0.07);
  --cl-border-mid: rgba(255, 255, 255, 0.12);
  --cl-grid-line: rgba(255, 255, 255, 0.025);
  --cl-grid-glow: rgba(232, 160, 32, 0.04);
  --cl-text: #e8e4da;
  --cl-text-2: #8a8680;
  --cl-text-dim: #4a4845;
  --cl-amber: #e8a020;
  --cl-amber-dim: #b07a18;
  --cl-amber-glow: rgba(232, 160, 32, 0.12);
  --cl-teal: #2ec4a0;
  --cl-teal-dim: #1a8a70;
  --cl-teal-glow: rgba(46, 196, 160, 0.1);
  --cl-purple: #9b7fe8;
  --cl-purple-dim: #6a4fc4;
  --cl-purple-glow:rgba(155, 127, 232, 0.12);
  --cl-red: #e85c5c;
  --cl-toggle-bg: rgba(255,255,255,0.05);
  --cl-toggle-border: rgba(255,255,255,0.12);
}

[data-theme=light] {
  --cl-bg: #f4f1eb;
  --cl-panel: #faf8f4;
  --cl-panel-2: #eeebe3;
  --cl-border: rgba(0, 0, 0, 0.08);
  --cl-border-mid: rgba(0, 0, 0, 0.14);
  --cl-grid-line: rgba(0, 0, 0, 0.04);
  --cl-grid-glow: rgba(232, 160, 32, 0.06);
  --cl-text: #1a1814;
  --cl-text-2: #6b6660;
  --cl-text-dim: #aaa59e;
  --cl-amber-glow: rgba(232, 160, 32, 0.15);
  --cl-teal-glow: rgba(46, 196, 160, 0.12);
  --cl-purple-glow:rgba(155, 127, 232, 0.14);
  --cl-toggle-bg: rgba(0,0,0,0.04);
  --cl-toggle-border: rgba(0,0,0,0.14);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--cl-bg);
  color: var(--cl-text);
  font-family: "DM Sans", sans-serif;
  font-weight: 300;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.2s, color 0.2s;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: linear-gradient(var(--cl-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--cl-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}
.bg-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--cl-grid-glow) 0%, transparent 70%);
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--cl-border);
  padding: 1.25rem 2rem;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.wordmark {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  line-height: 1;
  flex: 1;
}
.wordmark-main {
  color: var(--cl-text);
}
.wordmark-accent {
  color: var(--cl-amber);
  font-style: italic;
  margin-left: 0.35em;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--cl-toggle-bg);
  border: 1px solid var(--cl-toggle-border);
  border-radius: 4px;
  overflow: hidden;
  flex-shrink: 0;
}

.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  color: var(--cl-text-2);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.theme-btn:hover {
  color: var(--cl-text);
}
.theme-btn.active {
  background: var(--cl-amber-glow);
  color: var(--cl-amber);
}
.theme-btn + .theme-btn {
  border-left: 1px solid var(--cl-toggle-border);
}

.main {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 820px) {
  .main {
    grid-template-columns: 1fr;
    padding: 1.25rem;
  }
}

.panel {
  background: var(--cl-panel);
  border: 1px solid var(--cl-border);
  border-radius: 14px;
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cl-border-mid), transparent);
}
.panel--results {
  min-height: 320px;
}

.panel-label {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cl-text-dim);
  margin-bottom: 1.25rem;
}

.field-group {
  margin-bottom: 1.75rem;
}

.field-label {
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--cl-text);
  margin-bottom: 0.6rem;
}
.field-label em {
  font-style: normal;
  font-family: "DM Mono", "Courier New", monospace;
  color: var(--cl-amber);
}

.field-hint {
  font-size: 0.7rem;
  color: var(--cl-text-dim);
  font-family: "DM Mono", "Courier New", monospace;
  font-weight: 400;
  font-style: normal;
}

input[type=number] {
  background: var(--cl-bg);
  border: 1px solid var(--cl-border-mid);
  border-radius: 4px;
  color: var(--cl-text);
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  outline: none;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
  -moz-appearance: textfield;
  appearance: textfield;
}
input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}
input[type=number]:focus {
  border-color: var(--cl-amber-dim);
  box-shadow: 0 0 0 3px var(--cl-amber-glow);
}
input[type=number]::placeholder {
  color: var(--cl-text-dim);
}

.multiplier-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.multiplier-row input {
  flex: 1;
  text-align: center;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}

.stepper-btn {
  background: var(--cl-bg);
  border: 1px solid var(--cl-border-mid);
  border-radius: 4px;
  color: var(--cl-text-2);
  cursor: pointer;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  line-height: 1;
}
.stepper-btn:hover {
  color: var(--cl-amber);
  border-color: var(--cl-amber-dim);
  background: var(--cl-amber-glow);
}
.stepper-btn:active {
  transform: scale(0.96);
}

.field-group--checkbox {
  margin-bottom: 1.5rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}
.checkbox-label:hover .checkbox-custom {
  border-color: var(--cl-amber-dim);
}

.checkbox-wrap {
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
}
.checkbox-wrap input[type=checkbox] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.checkbox-custom {
  display: block;
  width: 16px;
  height: 16px;
  border: 1px solid var(--cl-border-mid);
  border-radius: 3px;
  background: var(--cl-bg);
  transition: border-color 0.15s, background 0.15s;
  position: relative;
}
.checkbox-custom::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 5px;
  width: 4px;
  height: 8px;
  border: 1.5px solid var(--cl-amber);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity 0.12s;
}

input[type=checkbox]:checked + .checkbox-custom {
  background: var(--cl-amber-glow);
  border-color: var(--cl-amber-dim);
}
input[type=checkbox]:checked + .checkbox-custom::after {
  opacity: 1;
}

.checkbox-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.85rem;
  color: var(--cl-text);
  font-weight: 400;
  line-height: 1.4;
}

.error-msg {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.7rem;
  color: var(--cl-red);
  margin-top: 0.5rem;
  min-height: 1em;
  letter-spacing: 0.04em;
}

.btn-compute {
  width: 100%;
  background: var(--cl-amber-glow);
  border: 1px solid var(--cl-amber-dim);
  border-radius: 4px;
  color: var(--cl-amber);
  cursor: pointer;
  justify-content: center;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  padding: 0.75rem 1.25rem;
  text-transform: uppercase;
  transition: all 0.15s;
}
.btn-compute:hover {
  background: rgba(232, 160, 32, 0.2);
  border-color: var(--cl-amber);
  color: #f0b84a;
  box-shadow: 0 0 20px var(--cl-amber-glow);
}
.btn-compute:active {
  transform: scale(0.99);
}

.sequence-tags-scroll {
  max-height: 200px;
  overflow-y: auto;
  margin-top: 0.5rem;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--cl-border-mid) transparent;
}
.sequence-tags-scroll::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
.sequence-tags-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.sequence-tags-scroll::-webkit-scrollbar-thumb {
  background: var(--cl-border-mid);
  border-radius: 2px;
}

.sequence-tags {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 4px;
}

.seq-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  background: var(--cl-bg);
  border: 1px solid var(--cl-border-mid);
  border-radius: 4px;
  padding: 6px 10px;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.8rem;
  color: var(--cl-text);
  animation: tag-in 0.18s ease;
  cursor: default;
}
.seq-tag__index {
  font-size: 0.6rem;
  color: var(--cl-text-dim);
  min-width: 1.5em;
  text-align: right;
}
.seq-tag__val {
  color: var(--cl-amber);
  cursor: pointer;
  flex: 1;
}
.seq-tag__val:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}
.seq-tag__edit-hint {
  font-size: 0.6rem;
  color: var(--cl-text-dim);
  letter-spacing: 0.04em;
  cursor: pointer;
  margin-left: auto;
}
.seq-tag__edit-hint:hover {
  color: var(--cl-text-2);
}
.seq-tag__remove {
  background: none;
  border: none;
  color: var(--cl-text-dim);
  cursor: pointer;
  font-size: 0.75rem;
  line-height: 1;
  padding: 0 2px;
  transition: color 0.12s;
  flex-shrink: 0;
}
.seq-tag__remove:hover {
  color: var(--cl-red);
}
.seq-tag.is-editing {
  border-color: var(--cl-amber-dim);
  background: var(--cl-amber-glow);
}
.seq-tag__edit-input {
  width: 80px;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--cl-amber-dim);
  color: var(--cl-amber);
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.8rem;
  outline: none;
  padding: 0;
  flex: 1;
  -moz-appearance: textfield;
  appearance: textfield;
}
.seq-tag__edit-input::-webkit-inner-spin-button, .seq-tag__edit-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

@keyframes tag-in {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}
.add-row {
  display: flex;
  gap: 8px;
}
.add-row input {
  flex: 1;
}

.btn-add {
  background: transparent;
  border: 1px solid var(--cl-border-mid);
  border-radius: 4px;
  color: var(--cl-text-2);
  cursor: pointer;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  padding: 0.5rem 1rem;
  text-transform: uppercase;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-add:hover {
  color: var(--cl-amber);
  border-color: var(--cl-amber-dim);
  background: var(--cl-amber-glow);
}
.btn-add:active {
  transform: scale(0.97);
}

.results-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
}

.empty-formula {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 0.05em;
  user-select: none;
}
.empty-formula__a {
  color: var(--cl-amber);
  font-style: italic;
}
.empty-formula__x {
  color: var(--cl-text-dim);
  font-style: italic;
}
.empty-formula__op {
  color: var(--cl-text-dim);
  font-size: 0.6em;
  margin: 0 0.1em;
}
.empty-formula__b {
  color: var(--cl-teal);
  font-style: italic;
}
.empty-formula__b.is-long {
  text-decoration: underline;
  text-decoration-color: var(--cl-teal-dim);
  text-decoration-style: dotted;
  text-underline-offset: 4px;
  cursor: help;
}

.cycle-summary {
  background: var(--cl-panel-2);
  border: 1px solid var(--cl-border);
  border-left: 3px solid var(--cl-amber-dim);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.78rem;
  color: var(--cl-text-2);
  line-height: 1.7;
  margin-bottom: 0.25rem;
}
.cycle-summary .summary-title {
  color: var(--cl-text);
  font-size: 0.8rem;
  margin-bottom: 0.4rem;
}
.cycle-summary .summary-rules {
  list-style: none;
  padding: 0;
  margin: 0;
}
.cycle-summary .summary-rules li {
  padding-left: 1.2em;
  position: relative;
}
.cycle-summary .summary-rules li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cl-text-dim);
}
.cycle-summary .summary-rules li.summary-warning {
  color: var(--cl-red);
}
.cycle-summary .summary-rules li.summary-warning::before {
  color: var(--cl-red);
}
.cycle-summary .summary-val {
  color: var(--cl-amber);
  cursor: default;
}
.cycle-summary .summary-val.is-long {
  text-decoration: underline;
  text-decoration-color: var(--cl-text-dim);
  text-decoration-style: dotted;
  text-underline-offset: 2px;
  cursor: help;
}
.cycle-summary .summary-val-b {
  color: var(--cl-teal);
}
.cycle-summary .summary-val-start {
  color: var(--cl-purple);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.metric-card {
  background: var(--cl-panel-2);
  border: 1px solid var(--cl-border);
  border-radius: 8px;
  padding: 1rem;
}
.metric-card__label {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cl-text-dim);
  margin-bottom: 0.4rem;
}
.metric-card__val {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.95rem;
  color: var(--cl-text);
  word-break: break-all;
  line-height: 1.4;
}
.metric-card--amber .metric-card__val {
  color: var(--cl-amber);
}
.metric-card--teal .metric-card__val {
  color: var(--cl-teal);
}
.metric-card--purple .metric-card__val {
  color: var(--cl-purple);
}

.cycle-legend {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.legend-item {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid;
}
.legend-item--start {
  background: var(--cl-purple-glow);
  border-color: var(--cl-purple-dim);
  color: var(--cl-purple);
}
.legend-item--odd {
  background: var(--cl-teal-glow);
  border-color: var(--cl-teal-dim);
  color: var(--cl-teal);
}
.legend-item--even {
  background: transparent;
  border-color: var(--cl-border-mid);
  color: var(--cl-text-2);
}

.cycle-arrow {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.65rem;
  color: var(--cl-text-dim);
  align-self: flex-end;
  padding: 0 4px;
  margin-bottom: 7px;
  flex-shrink: 0;
}

.num-tooltip {
  position: fixed;
  background: var(--cl-panel);
  border: 1px solid var(--cl-border-mid);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.72rem;
  color: var(--cl-text);
  max-width: min(380px, 100vw - 32px);
  max-height: min(320px, 100vh - 32px);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.1s;
}
.num-tooltip.visible {
  opacity: 1;
}
.num-tooltip.pinned {
  pointer-events: all;
  border-color: var(--cl-amber-dim);
}
.num-tooltip__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
}
.num-tooltip__label {
  font-size: 0.6rem;
  color: var(--cl-text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.num-tooltip__close {
  display: none;
  background: none;
  border: none;
  color: var(--cl-text-dim);
  cursor: pointer;
  font-size: 0.7rem;
  line-height: 1;
  padding: 2px 4px;
  transition: color 0.12s;
}
.num-tooltip__close:hover {
  color: var(--cl-text);
}
.num-tooltip.pinned .num-tooltip__close {
  display: block;
}
.num-tooltip__full {
  color: var(--cl-amber);
  font-size: 0.7rem;
  line-height: 1.7;
  word-break: break-all;
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: var(--cl-border-mid) transparent;
}
.num-tooltip__full::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
.num-tooltip__full::-webkit-scrollbar-track {
  background: transparent;
}
.num-tooltip__full::-webkit-scrollbar-thumb {
  background: var(--cl-border-mid);
  border-radius: 2px;
}

.cycle-verify {
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  margin-top: 0.25rem;
}
.cycle-verify.ok {
  color: var(--cl-teal);
}
.cycle-verify.fail {
  color: var(--cl-red);
}

.detail-table-wrap {
  overflow: auto;
  max-height: 480px;
  border: 1px solid var(--cl-border);
  border-radius: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--cl-border-mid) transparent;
}
.detail-table-wrap::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
.detail-table-wrap::-webkit-scrollbar-track {
  background: transparent;
}
.detail-table-wrap::-webkit-scrollbar-thumb {
  background: var(--cl-border-mid);
  border-radius: 2px;
}

.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.75rem;
}
.detail-table th {
  background: var(--cl-panel-2);
  color: var(--cl-text-dim);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: left;
  padding: 0.6rem 1rem;
  font-weight: 400;
  border-bottom: 1px solid var(--cl-border);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 1;
}
.detail-table td {
  padding: 0.45rem 1rem;
  border-bottom: 1px solid var(--cl-border);
  vertical-align: middle;
  white-space: nowrap;
}
.detail-table td:last-child {
  white-space: normal;
  word-break: break-all;
}
.detail-table tr:last-child td {
  border-bottom: none;
}
.detail-table tr:hover td {
  background: rgba(128, 128, 128, 0.04);
}
.detail-table .td-index {
  color: var(--cl-text-dim);
}
.detail-table .td-op-start {
  color: var(--cl-purple);
}
.detail-table .td-op-odd {
  color: var(--cl-teal);
}
.detail-table .td-op-even {
  color: var(--cl-text-2);
}
.detail-table .td-val {
  color: var(--cl-text);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.detail-table .td-val[data-full] {
  cursor: help;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 2px;
  text-decoration-color: var(--cl-text-dim);
}
.detail-table .td-val--start {
  color: var(--cl-purple);
}
.detail-table .td-val--end {
  color: var(--cl-purple);
}
.detail-table .td-val--odd {
  color: var(--cl-amber);
}
.detail-table .td-digits {
  color: var(--cl-text-dim);
  text-align: right;
}

.site-footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--cl-border);
  padding: 1rem 2rem;
  display: flex;
  gap: 0.75rem;
  font-family: "DM Mono", "Courier New", monospace;
  font-size: 0.65rem;
  color: var(--cl-text-dim);
  letter-spacing: 0.06em;
}

.footer-sep {
  color: var(--cl-border-mid);
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.results-content {
  animation: fade-in 0.25s ease;
}

.metric-card {
  animation: fade-in 0.2s ease both;
}
.metric-card:nth-child(1) {
  animation-delay: 0s;
}
.metric-card:nth-child(2) {
  animation-delay: 0.04s;
}
.metric-card:nth-child(3) {
  animation-delay: 0.08s;
}
.metric-card:nth-child(4) {
  animation-delay: 0.12s;
}
.metric-card:nth-child(5) {
  animation-delay: 0.16s;
}
.metric-card:nth-child(6) {
  animation-delay: 0.2s;
}