:root {
  --abyss: #0a1c24;
  --deep: #102e39;
  --panel: #143846;
  --reef: #1f5c69;
  --reef-line: #2c6f7c;
  --foam: #eaf6f4;
  --foam-dim: #a9c7c6;
  --signal: #f2a65a;
  --signal-dim: #c98643;
  --kelp: #4fb18f;
  --coral: #e8663f;
  --amber: #e8b84a;
  --violet: #8b7ec8;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--abyss);
  color: var(--foam);
  font-family: var(--font-body);
  min-height: 100vh;
}

body {
  position: relative;
  overflow-x: hidden;
}

.chart-lines {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-radial-gradient(circle at 85% -10%, transparent 0, transparent 60px, rgba(234,246,244,0.035) 61px, transparent 62px, transparent 130px),
    repeating-radial-gradient(circle at 10% 110%, transparent 0, transparent 90px, rgba(234,246,244,0.03) 91px, transparent 92px, transparent 170px);
}

a, button, input, select, textarea { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.site-header, main, .site-footer {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-top: 40px;
  padding-bottom: 28px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  width: 46px;
  height: 32px;
  flex-shrink: 0;
}
.brand-mark path { fill: var(--signal); }
.brand-mark path:last-child { fill: var(--foam); }

.brand-text h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--foam-dim);
  font-style: italic;
}

.ghost-btn {
  background: transparent;
  border: 1px solid var(--reef-line);
  color: var(--foam-dim);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}
.ghost-btn:hover { border-color: var(--coral); color: var(--coral); }
.ghost-btn--solid {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--abyss);
  font-weight: 600;
}
.ghost-btn--solid:hover {
  background: var(--foam);
  border-color: var(--foam);
  color: var(--abyss);
}
.ghost-btn--tiny {
  padding: 4px 10px;
  font-size: 0.72rem;
}
.ghost-btn--danger:hover {
  border-color: var(--coral);
  color: var(--coral);
  background: rgba(232, 102, 63, 0.12);
}
.ghost-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.ghost-btn:disabled:hover {
  border-color: var(--reef-line);
  color: var(--foam-dim);
  background: transparent;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.status-msg {
  flex-basis: 100%;
  margin: 0;
  text-align: right;
  min-height: 1.15em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--foam-dim);
}
.status-msg.is-ok { color: var(--kelp); }
.status-msg.is-warn { color: var(--amber); }

/* Decision bar */
.decision-bar { margin-bottom: 24px; }
.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 8px;
}
#decisionName {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--reef-line);
  color: var(--foam);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  padding: 6px 2px 12px;
}
#decisionName::placeholder { color: var(--foam-dim); opacity: 0.55; }

/* Pathway select */
.pathway-select {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-bottom: 28px;
}

.pathway-btn {
  background: var(--deep);
  border: 1px solid var(--reef-line);
  border-radius: var(--radius);
  padding: 12px 12px;
  text-align: left;
  cursor: pointer;
  color: var(--foam-dim);
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.1s ease;
  min-height: 72px;
}
.pathway-btn:hover { border-color: var(--signal-dim); transform: translateY(-1px); }

.pathway-btn.is-active {
  background: var(--panel);
  border-color: var(--signal);
  color: var(--foam);
}

.pathway-index {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--reef-line);
}
.pathway-btn.is-active .pathway-index { color: var(--signal); }

.pathway-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.2;
}

.pathway-sub {
  font-size: 0.7rem;
  color: var(--foam-dim);
  line-height: 1.3;
}

/* Shared workspace */
.workspace {
  display: grid;
  gap: 18px;
  align-items: start;
  margin-bottom: 24px;
}
.workspace[hidden] { display: none !important; }

.workspace--dual {
  grid-template-columns: 1fr 1fr 260px;
}

.columns { display: contents; }

.column, .eisen-cell, .swot-cell, .rapid-col, .panel, .tree-option {
  background: var(--deep);
  border: 1px solid var(--reef-line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.column-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.column-head h2 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin: 0;
}

.column--left .column-head h2 { color: var(--kelp); }
.column--right .column-head h2 { color: var(--coral); }

.column-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--foam-dim);
  flex-shrink: 0;
}

.quad-sub {
  margin: 0 0 12px;
  font-size: 0.72rem;
  color: var(--foam-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.entry-form, .inline-form {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.entry-form input[type="text"],
.inline-form input[type="text"],
.inline-form input[type="number"]:not(.weight-input),
.tree-branch-form input[type="text"],
.tree-branch-form input[type="number"] {
  flex: 1;
  min-width: 0;
  background: var(--abyss);
  border: 1px solid var(--reef-line);
  border-radius: 6px;
  color: var(--foam);
  padding: 9px 10px;
  font-size: 0.88rem;
}
.entry-form input::placeholder,
.inline-form input::placeholder { color: var(--foam-dim); opacity: 0.6; }

.weight-input, .sod-row input {
  width: 48px;
  background: var(--abyss);
  border: 1px solid var(--reef-line);
  border-radius: 6px;
  color: var(--foam);
  font-family: var(--font-mono);
  text-align: center;
  padding: 9px 4px;
  font-size: 0.85rem;
}

.add-btn {
  width: 38px;
  height: 38px;
  border-radius: 6px;
  border: none;
  background: var(--signal);
  color: var(--abyss);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease;
  flex-shrink: 0;
}
.add-btn:hover { background: var(--foam); }

.entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.entry-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.88rem;
  animation: rise 0.2s ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.entry-item__text { flex: 1; word-break: break-word; }

.entry-item__weight {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--foam-dim);
  background: var(--abyss);
  border-radius: 4px;
  padding: 2px 6px;
}

.entry-item__remove, .icon-btn {
  background: transparent;
  border: none;
  color: var(--foam-dim);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 4px;
}
.entry-item__remove:hover, .icon-btn:hover { color: var(--coral); }

.empty-hint {
  color: var(--foam-dim);
  font-size: 0.82rem;
  font-style: italic;
  padding: 10px 2px;
  margin: 0;
}

/* Gauge / insight panels */
.gauge-panel, .insight-panel {
  background: var(--panel);
  border: 1px solid var(--reef-line);
  border-radius: var(--radius);
  padding: 20px 18px;
  position: sticky;
  top: 20px;
}

.gauge-head { margin-bottom: 8px; }

.gauge-eyebrow, .panel-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--signal);
}

#gaugeVerdict, .insight-panel h3, .panel-head h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 4px 0 10px;
}

.panel-head h2 { font-size: 1.25rem; margin: 4px 0 6px; }

.panel-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--foam-dim);
  line-height: 1.45;
  max-width: 52ch;
}

.panel-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  align-items: flex-start;
}

.panel-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: min(100%, 280px);
}

.panel--wide { min-height: auto; }
.panel--full { grid-column: 1 / -1; min-height: auto; }

.gauge { width: 100%; height: auto; }

.gauge-track {
  fill: none;
  stroke: var(--reef);
  stroke-width: 14;
  stroke-linecap: round;
}

.gauge-fill {
  fill: none;
  stroke: var(--signal);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 141.5;
  transition: stroke-dashoffset 0.4s ease, stroke 0.4s ease;
}

.gauge-needle {
  stroke: var(--foam);
  stroke-width: 3;
  stroke-linecap: round;
  transform-origin: 110px 120px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.gauge-hub { fill: var(--foam); }

.gauge-readout {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  border-top: 1px solid var(--reef-line);
  padding-top: 12px;
}

.readout-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--foam-dim);
}

.readout-value {
  font-family: var(--font-mono);
  color: var(--foam);
}

.readout-item--net {
  font-weight: 600;
  color: var(--foam);
  border-top: 1px dashed var(--reef-line);
  padding-top: 6px;
  margin-top: 2px;
}
.readout-item--net .readout-value { font-size: 1.05rem; color: var(--signal); }

.gauge-note {
  margin: 12px 0 0;
  font-size: 0.78rem;
  color: var(--foam-dim);
  line-height: 1.4;
}

.rank-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.rank-list li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.82rem;
  padding: 8px 10px;
  background: var(--deep);
  border-radius: 6px;
}
.rank-list .rank-score {
  font-family: var(--font-mono);
  color: var(--signal);
  white-space: nowrap;
}
.rank-list li.is-top { border: 1px solid var(--kelp); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 16px;
}
.stat {
  background: var(--deep);
  border-radius: 6px;
  padding: 10px 8px;
  text-align: center;
}
.stat-label {
  display: block;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--foam-dim);
  margin-bottom: 4px;
}
.stat-value {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--foam);
}

/* Tables */
.table-scroll {
  overflow-x: auto;
  margin-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}

.matrix-table, .data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 480px;
}

.matrix-table th, .matrix-table td,
.data-table th, .data-table td {
  border: 1px solid var(--reef-line);
  padding: 8px 10px;
  text-align: center;
  vertical-align: middle;
}

.matrix-table th, .data-table th {
  background: var(--panel);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.8rem;
}

.matrix-table th:first-child,
.matrix-table td:first-child,
.data-table th:first-child,
.data-table td:first-child {
  text-align: left;
  min-width: 120px;
}

.matrix-table tfoot td {
  font-family: var(--font-mono);
  font-weight: 600;
  background: var(--panel);
}

.matrix-table .is-baseline {
  background: rgba(242, 166, 90, 0.12);
}
.matrix-table .is-best {
  color: var(--kelp);
  box-shadow: inset 0 0 0 1px var(--kelp);
}

.score-select {
  background: var(--abyss);
  border: 1px solid var(--reef-line);
  color: var(--foam);
  border-radius: 4px;
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
}

.crit-weight {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--foam-dim);
  margin-left: 4px;
}

.rpn-cell {
  font-family: var(--font-mono);
  font-weight: 600;
}
.rpn-high { color: var(--coral); }
.rpn-mid { color: var(--amber); }
.rpn-low { color: var(--kelp); }

.data-table td:nth-child(2),
.data-table td:nth-child(7) {
  text-align: left;
  max-width: 180px;
  word-break: break-word;
}

.inline-form--stack {
  flex-direction: column;
  align-items: stretch;
  min-width: min(100%, 300px);
}
.inline-form--stack .sod-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.inline-form--stack .sod-row label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--foam-dim);
}
.inline-form--stack .sod-row input {
  width: 44px;
  padding: 6px 2px;
}

/* Pugh layout */
.workspace--pugh,
.workspace--fmea,
.workspace--tree {
  grid-template-columns: 1fr 240px;
}

/* Eisenhower */
.workspace--eisenhower {
  grid-template-columns: 28px 1fr;
  grid-template-rows: 1fr auto;
  gap: 10px;
}

.eisen-axis {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--foam-dim);
}
.eisen-axis--y {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  display: flex;
  align-items: center;
  justify-content: center;
  grid-row: 1;
}
.eisen-axis--x {
  grid-column: 2;
  display: flex;
  justify-content: space-between;
  padding: 0 12% 0 12%;
}

.eisen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
}

.eisen-cell--do { border-color: var(--coral); }
.eisen-cell--do .column-head h2 { color: var(--coral); }
.eisen-cell--schedule { border-color: var(--signal); }
.eisen-cell--schedule .column-head h2 { color: var(--signal); }
.eisen-cell--delegate { border-color: var(--amber); }
.eisen-cell--delegate .column-head h2 { color: var(--amber); }
.eisen-cell--eliminate { border-color: var(--reef-line); }
.eisen-cell--eliminate .column-head h2 { color: var(--foam-dim); }

/* Decision tree */
.tree-options {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tree-option {
  min-height: auto;
  gap: 10px;
}

.tree-option__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.tree-option__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin: 0;
  color: var(--signal);
}

.tree-option__ev {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--kelp);
}

.tree-branch-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tree-branch-form input[type="number"] {
  flex: 0 0 88px;
  width: 88px;
}

.branch-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.branch-item {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 10px;
  align-items: center;
  background: var(--panel);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.85rem;
}

.branch-item .branch-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--foam-dim);
}

.prob-warn {
  color: var(--coral);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

/* SWOT */
.workspace--swot {
  grid-template-columns: 1fr 1fr 240px;
  grid-template-rows: auto auto;
}

.swot-grid {
  display: contents;
}

.swot-cell--s { grid-column: 1; grid-row: 1; border-color: var(--kelp); }
.swot-cell--s .column-head h2 { color: var(--kelp); }
.swot-cell--w { grid-column: 2; grid-row: 1; border-color: var(--coral); }
.swot-cell--w .column-head h2 { color: var(--coral); }
.swot-cell--o { grid-column: 1; grid-row: 2; border-color: var(--signal); }
.swot-cell--o .column-head h2 { color: var(--signal); }
.swot-cell--t { grid-column: 2; grid-row: 2; border-color: var(--violet); }
.swot-cell--t .column-head h2 { color: var(--violet); }

.workspace--swot .insight-panel {
  grid-column: 3;
  grid-row: 1 / span 2;
}

/* RAPID */
.workspace--rapid {
  grid-template-columns: 1fr;
}

.rapid-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.rapid-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4em;
  height: 1.4em;
  border-radius: 4px;
  background: var(--signal);
  color: var(--abyss);
  font-family: var(--font-mono);
  font-size: 0.75em;
  margin-right: 4px;
  vertical-align: middle;
}

.rapid-col .column-head h2 {
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 2px;
}

.rapid-col--decide {
  border-color: var(--signal);
  background: linear-gradient(180deg, rgba(242,166,90,0.08), var(--deep));
}

.rapid-checklist {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.check-chip {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--reef-line);
  color: var(--foam-dim);
}
.check-chip.is-ok {
  border-color: var(--kelp);
  color: var(--kelp);
}
.check-chip.is-warn {
  border-color: var(--coral);
  color: var(--coral);
}

/* Footer */
.site-footer {
  padding: 40px 24px 60px;
  text-align: center;
}
.site-footer p {
  font-size: 0.78rem;
  color: var(--foam-dim);
}

/* Responsive */
@media (max-width: 960px) {
  .workspace--dual {
    grid-template-columns: 1fr 1fr;
  }
  .workspace--dual .gauge-panel,
  .workspace--pugh .insight-panel,
  .workspace--fmea .insight-panel,
  .workspace--tree .insight-panel {
    grid-column: 1 / -1;
    position: static;
  }
  .workspace--pugh,
  .workspace--fmea,
  .workspace--tree {
    grid-template-columns: 1fr;
  }
  .workspace--swot {
    grid-template-columns: 1fr 1fr;
  }
  .workspace--swot .insight-panel {
    grid-column: 1 / -1;
    grid-row: auto;
    position: static;
  }
  .rapid-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .rapid-col--decide {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  .pathway-select { grid-template-columns: repeat(2, 1fr); }
  .workspace--dual { grid-template-columns: 1fr; }
  .workspace--eisenhower {
    grid-template-columns: 1fr;
  }
  .eisen-axis--y { display: none; }
  .eisen-axis--x { display: none; }
  .eisen-grid { grid-template-columns: 1fr; }
  .workspace--swot { grid-template-columns: 1fr; }
  .rapid-grid { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; }
  .header-actions { justify-content: flex-start; }
  .status-msg { text-align: left; }
  .brand-text h1 { font-size: 1.3rem; }
  .branch-item {
    grid-template-columns: 1fr auto;
  }
  .panel-actions { min-width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}