/* Kelvin Analytics UI Tokens (from tokens.css) */
:root {
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 22px;
  --text-2xl: 28px;
  --text-3xl: 36px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 18px;
  --accent: #2563EB;
  --accent-rgb: 37 99 235;
  --accent-hover: #1D4ED8;
  --page: #0B1220;
  --surface: #0F172A;
  --surface-2: #111C33;
  --text: #E5E7EB;
  --text-2: #CBD5E1;
  --muted: #94A3B8;
  --border: rgba(148, 163, 184, 0.18);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 10px 26px rgba(0, 0, 0, 0.38);
  --dur-1: 120ms;
  --dur-2: 180ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --topbarH: 60px;
  --radius: var(--r-sm);
  --panel: var(--surface);
  --panel2: var(--surface-2);
}

:root[data-theme="dark"] { color-scheme: dark; }

/* Body styling handled by base.css; keep layout overrides here */

/* Topbar */
.topbar {
  height: var(--topbarH);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar__left {
  display: flex;
  gap: 12px;
  align-items: center;
}

.app-title { font-size: 16px; }

.app-title-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  gap: 12px;
  align-items: center;
}

.app-title-link:hover {
  opacity: 0.8;
}

.app-tagline {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  border-left: 1px solid var(--border);
  padding-left: 12px;
}

.save-status {
  font-size: 12px;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--surface-2);
}

.save-status--saving { color: var(--warning); }
.save-status--saved { color: var(--ok); }
.save-status--error { color: var(--danger); }

/* Auth Area */
.topbar__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Landing Page */
.landing-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--topbarH));
  padding: var(--space-8);
  background: linear-gradient(180deg, var(--page) 0%, var(--surface) 100%);
}

.landing-page.hidden {
  display: none;
}

.landing-content {
  text-align: center;
  max-width: 600px;
}

.landing-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--text);
  margin: 0 0 var(--space-2);
}

.landing-tagline {
  font-size: var(--text-xl);
  color: var(--accent);
  margin: 0 0 var(--space-6);
  font-weight: 500;
}

.landing-description {
  font-size: var(--text-md);
  color: var(--text-2);
  line-height: 1.6;
  margin: 0 0 var(--space-8);
}

.btn--large {
  padding: 14px 32px;
  font-size: var(--text-md);
}

.auth-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-loading {
  font-size: 12px;
  color: var(--muted);
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.auth-user__name {
  font-size: 13px;
  color: var(--text);
}

.btn--signin {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.btn--signin:hover {
  background: var(--accent-bg);
}

.btn--signout {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
  font-size: 12px;
  padding: 6px 12px;
}

.btn--signout:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* Layout */
.layout {
  max-width: 100%;
  margin: 0 auto;
  padding: 24px;
  min-height: calc(100vh - var(--topbarH));
}

/* Views */
.view { display: block; }
.view.hidden { display: none; }

.view__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.view__header h1 {
  margin: 0;
  font-size: 24px;
  flex: 1;
  text-align: center;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Dropdown */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown__trigger {
  cursor: pointer;
}

.dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  min-width: 160px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  overflow: hidden;
}

.dropdown__menu.open {
  display: block;
}

.dropdown__item {
  display: block;
  width: 100%;
  padding: 10px 16px;
  text-align: left;
  background: none;
  border: none;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s;
}

.dropdown__item:hover {
  background: var(--hover);
}

.dropdown__item:not(:last-child) {
  border-bottom: 1px solid var(--border);
}


/* Kelvin Analytics UI Button Styles (from components.css) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  cursor: pointer;
  transition:
    background var(--dur-2) var(--ease-out),
    border-color var(--dur-2) var(--ease-out),
    box-shadow var(--dur-2) var(--ease-out);
}
.btn:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(148,163,184,0.30);
}
.btn-primary {
  background: var(--accent);
  border-color: rgba(var(--accent-rgb) / 0.35);
  color: #FFFFFF;
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: rgba(var(--accent-rgb) / 0.45);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(148,163,184,0.22);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(148,163,184,0.30);
}

/* Card and Tile Styles (from components.css and tiles.css) */
.card {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-1);
}
.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}
@media (max-width: 1100px) {
  .tile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .tile-grid { grid-template-columns: 1fr; }
}
.tile {
  position: relative;
  display: block;
  border-radius: var(--r-lg);
  padding: var(--space-6);
  color: inherit;
  text-decoration: none;
  background: linear-gradient(
    180deg,
    rgba(255,255,255,0.035),
    rgba(255,255,255,0.015)
  );
  border: 1px solid rgba(148,163,184,0.18);
  box-shadow: var(--shadow-1);
  transition:
    transform var(--dur-2) var(--ease-out),
    border-color var(--dur-2) var(--ease-out),
    box-shadow var(--dur-2) var(--ease-out),
    background var(--dur-2) var(--ease-out);
}
.tile:hover {
  transform: translateY(-2px);
  border-color: rgba(59,130,246,0.28);
  box-shadow: var(--shadow-2);
  text-decoration: none;
}
.tile:focus-within {
  border-color: rgba(59,130,246,0.45);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.12), var(--shadow-2);
}
.tile-title {
  font-size: var(--text-xl);
  font-weight: 750;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 0;
}
.tile-desc {
  margin-top: var(--space-3);
  color: rgba(148,163,184,0.92);
  font-size: var(--text-sm);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tile-meta {
  margin-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: rgba(203, 213, 225, 0.72);
  font-size: var(--text-xs);
}
.tile-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148,163,184,0.18);
  background: rgba(255,255,255,0.03);
  color: rgba(203,213,225,0.88);
  font-size: var(--text-xs);
}
.tile-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

/* Utility classes (from base.css) */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: 1.55;
  background: var(--page);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  width: min(1180px, calc(100% - 2 * var(--space-6)));
  margin: 0 auto;
}
:focus-visible {
  outline: 3px solid rgba(var(--accent-rgb) / 0.35);
  outline-offset: 2px;
  border-radius: 10px;
}
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.wrap { flex-wrap: wrap; }

/* Cards */
.card-list {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-delete-card {
  position: absolute;
  top: 8px;
  right: 8px;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 16px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}

.card:hover .btn-delete-card {
  opacity: 1;
}

.btn-delete-card:hover {
  color: var(--danger);
  background: var(--danger-bg);
}

.card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.card__desc {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 8px;
}

.card__meta {
  font-size: 12px;
  color: var(--muted);
}

/* Forms */
.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
}

.field textarea {
  min-height: 80px;
  resize: vertical;
}

/* Deep Dive Editor */
.deep-dive-editor {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.instruction-banner {
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.5;
  font-style: italic;
}

.editor-section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.editor-section h2 {
  margin: 0 0 4px;
  font-size: 16px;
}

.section-desc {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 16px;
}

/* Grain */
.grain-inputs {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.derived-sentence {
  margin-top: 16px;
  padding: 12px;
  background: var(--panel2);
  border-radius: var(--radius);
  font-size: 14px;
}

.derived-sentence label {
  color: var(--muted);
  font-size: 12px;
  display: block;
  margin-bottom: 4px;
}

.sentence-preview {
  font-style: italic;
  color: var(--accent);
}

/* Item Lists */
.item-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.item__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item__row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.item input {
  flex: 1;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 14px;
  outline: none;
}

.item input:focus {
  border-color: var(--accent);
}

.item input::placeholder {
  color: var(--muted);
}

.item__actions {
  display: flex;
  gap: 4px;
}

.item--dragging {
  opacity: 0.5;
}

.item .drag-handle {
  cursor: grab;
  color: var(--muted);
  padding: 4px;
}

.item .drag-handle:active {
  cursor: grabbing;
}

/* Priority badge */
.priority-badge {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-bg);
  color: var(--accent);
}

/* Release dropdown for questions */
.release-select {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-bg);
  color: var(--accent);
  border: 1px solid transparent;
  cursor: pointer;
  min-width: 90px;
}

.release-select:hover {
  border-color: var(--accent);
}

.release-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Modality dropdown for questions */
.modality-select {
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--surface-alt);
  color: var(--text-secondary);
  border: 1px solid transparent;
  cursor: pointer;
  min-width: 100px;
  margin-left: 4px;
}

.modality-select:hover {
  border-color: var(--border);
}

.modality-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Highlight ML-relevant modalities */
.modality-select option[value="predictive"],
.modality-select option[value="prescriptive"] {
  font-weight: 600;
}

/* Collapsible Questions */
.question-item--collapsed {
  padding: 8px 12px;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.15s, background 0.15s;
}

.question-item--collapsed:hover {
  opacity: 1;
  background: var(--surface-2);
}

.question-item--collapsed .question-header {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.question-text-collapsed {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--muted);
  font-size: 13px;
}

.expand-icon {
  font-size: 10px;
  color: var(--muted);
  margin-left: auto;
  transition: transform 0.15s;
}

.question-item--expanded {
  background: var(--accent-bg);
  border-left: 2px solid var(--accent);
}

.question-item--expanded .question-header {
  cursor: default;
}

/* Collapsible 7W sections */
.editor-section.collapsible {
  transition: background 0.15s, border-color 0.15s;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  cursor: pointer;
}

.section-header h2 {
  margin: 0;
}

.section-caret {
  font-size: 12px;
  color: var(--muted);
  transition: transform 0.15s;
}

.editor-section.is-collapsed .section-body {
  display: none;
}

.editor-section.is-collapsed .section-caret {
  transform: rotate(-90deg);
}

/* Status badge */
.status-badge {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  text-transform: uppercase;
  font-weight: 600;
}

.status-badge.draft {
  background: var(--warning-bg);
  color: var(--warning);
}

.status-badge.complete {
  background: var(--success-bg);
  color: var(--ok);
}

/* Bus Matrix */
.bus-matrix {
  overflow-x: auto;
  margin-top: 24px;
}

.bus-matrix table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.bus-matrix th,
.bus-matrix td {
  padding: 8px;
  border: 1px solid var(--border);
  text-align: center;
}

.bus-matrix th {
  background: var(--panel2);
  font-weight: 500;
}

.bus-matrix td.question-cell {
  text-align: left;
  max-width: 200px;
}

.bus-matrix input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* Dimension Attributes */
.attributes-container {
  margin-top: 8px;
  padding-left: 20px;
  border-left: 2px solid var(--border);
}

.attribute-item {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 6px;
}

.attribute-item input {
  flex: 1;
  padding: 4px 8px;
  font-size: 13px;
}

.btn--add-attr {
  font-size: 12px;
  padding: 4px 8px;
  margin-top: 4px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
  overflow-y: auto;
}

.modal.hidden {
  display: none;
}

.modal__content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 100%;
  max-width: 400px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  margin: auto;
}

.modal__content--wide {
  max-width: 600px;
}

.modal__content h2 {
  margin: 0 0 20px;
}

.modal__actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Event DAG Container */
#eventList {
  display: flex;
  justify-content: center;
  overflow: visible;
}

.event-timeline {
  display: inline-flex;
  flex-wrap: nowrap;
  gap: 16px;
  padding: 16px 0 40px;
  position: relative;
  min-width: 100%;
}

/* Timeline connecting line */
.event-timeline::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
  z-index: 0;
}

/* Event Cards (with drag and priority) */
.event-card {
  display: flex;
  flex-direction: column;
  min-width: 220px;
  max-width: 280px;
  min-height: 110px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, transform 0.1s, opacity 0.15s;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  margin: 16px; /* Space for edge buttons */
}

.event-card:hover {
  border-color: var(--accent);
}

.event-card--dragging {
  opacity: 0.5;
  border-color: var(--accent);
}

.event-card .drag-handle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  cursor: grab;
  color: var(--muted);
  font-size: 14px;
  user-select: none;
  border-bottom: 1px solid var(--border);
}

.event-card .drag-handle:active {
  cursor: grabbing;
}

.event-card__content {
  flex: 1;
  padding: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.event-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.event-card__title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  cursor: text;
}

.event-title-input {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  background: var(--panel2);
  border: 1px solid var(--accent);
  border-radius: 4px;
  color: var(--text);
  padding: 2px 6px;
  width: 100%;
  outline: none;
}

.event-card__desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
  flex: 1;
}

.event-desc-input {
  width: 100%;
  resize: vertical;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  color: var(--text);
  font: inherit;
}

.decision-desc-input {
  width: 100%;
  resize: vertical;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px;
  color: var(--text);
  font: inherit;
}

.event-card__footer {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.event-card__actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}

.event-card:hover .event-card__actions {
  opacity: 1;
}

.priority-select {
  border: none;
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  flex-shrink: 0;
}

.priority-select option {
  background: var(--panel);
  color: var(--text);
}

.btn-delete-event,
.btn-add-decision,
.btn-fork-event,
.btn-merge-event {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.btn-add-decision {
  font-weight: 600;
}

.btn-delete-event:hover {
  color: var(--danger);
  background: var(--danger-bg);
}

.btn-fork-event:hover {
  color: var(--ok);
  background: var(--success-bg);
}

.btn-add-decision:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.btn-merge-event:hover {
  color: var(--accent);
  background: var(--accent-bg);
}

/* Edge buttons - positioned to overlap card borders */
.btn-edge {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
  z-index: 10;
}

.event-card:hover .btn-edge {
  opacity: 1;
}

.btn-edge:hover {
  transform: scale(1.1);
}

/* Top edge - connect/merge from previous */
.btn-edge--top {
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
}

.btn-edge--top:hover {
  transform: translateX(-50%) scale(1.1);
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Right edge - add decision */
.btn-edge--right {
  right: -14px;
  top: 50%;
  transform: translateY(-50%);
}

.btn-edge--right:hover {
  transform: translateY(-50%) scale(1.1);
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* Bottom edge - add next event */
.btn-edge--bottom {
  bottom: -14px;
  left: 50%;
  transform: translateX(-50%);
}

.btn-edge--bottom:hover {
  transform: translateX(-50%) scale(1.1);
  color: var(--ok);
  border-color: var(--ok);
  background: rgba(86, 211, 100, 0.15);
}

/* Top-right corner - delete */
.btn-edge--delete {
  top: -10px;
  right: -10px;
  width: 22px;
  height: 22px;
  font-size: 14px;
}

.btn-edge--delete:hover {
  transform: scale(1.1);
  color: var(--danger);
  border-color: var(--danger);
  background: rgba(255, 107, 107, 0.15);
}

/* DAG Timeline Layout (top-to-bottom) */
.dag-container {
  position: relative;
  min-height: 200px;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.dag-edges {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 0;
}

.dag-edge {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  opacity: 0.6;
}

.dag-arrow {
  fill: var(--accent);
  opacity: 0.6;
}

.decision-edge {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  opacity: 0.25;
  stroke-dasharray: 4 5;
}

.decision-arrow {
  fill: var(--accent);
  opacity: 0.25;
}

.dag-rows {
  display: flex;
  flex-direction: column;
  gap: 80px;
  padding: 20px 0;
  position: relative;
  z-index: 1;
}

/* BEAM Layout (Events column, Decisions column) */
.beam-columns {
  display: flex;
  flex-direction: row;
  gap: 48px;
  padding: 20px 0;
  position: relative;
  z-index: 1;
  justify-content: center;
}

.beam-column {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  min-width: 340px;
}

.beam-column__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.beam-column__title {
  flex: 1;
}

.beam-column__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel);
  color: var(--muted);
  font-size: 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.beam-column__toggle:hover {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.beam-column__content {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}

.beam-column--events {
  flex: 0 0 auto;
}

.beam-column--decisions {
  flex: 0 1 auto;
  max-width: 480px;
  transition: max-width 0.2s, min-width 0.2s, opacity 0.2s;
}

.beam-column--decisions.is-collapsed {
  min-width: 32px;
  max-width: 32px;
  cursor: pointer;
  margin-left: -40px; /* Butt up against events column when collapsed */
}

.beam-column--decisions.is-collapsed .beam-column__header {
  flex-direction: column;
  padding: 12px 4px;
  height: 100%;
  min-height: 200px;
}

.beam-column--decisions.is-collapsed .beam-column__title {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  white-space: nowrap;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

.beam-column--decisions.is-collapsed .beam-column__toggle {
  margin-bottom: 8px;
}

.beam-column--decisions.is-collapsed .beam-column__content {
  display: none;
}

.beam-event-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

/* Horizontal layout for sibling events at the same depth */
.beam-event-row--horizontal {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

.beam-decisions-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.beam-decisions-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Legacy classes kept for compatibility */
.beam-rows {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 0;
  position: relative;
  z-index: 1;
}

.beam-row {
  display: flex;
  flex-direction: row;
  gap: 24px;
  align-items: flex-start;
  justify-content: center;
}

.beam-event {
  flex: 0 0 auto;
}

.beam-decisions {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 4px;
  min-width: 260px;
}

.decision-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 220px;
  max-width: 340px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.decision-card__content {
  padding: 12px 14px;
  cursor: pointer;
}

.decision-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 6px;
}

.decision-card__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.2;
  flex: 1;
  padding-right: 60px; /* Space for absolute buttons */
}

.decision-card__status {
  font-size: 11px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  background: var(--surface-2);
  flex: 0 0 auto;
}

/* .decision-card__value removed - now uses .decision-card__impact styling */

.decision-card__desc {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.decision-card__impact {
  font-size: 12px;
  color: var(--text);
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

.decision-card__impact-label {
  font-size: 11px;
  color: var(--accent);
  margin-right: 6px;
}

.btn-edit-decision,
.btn-delete-decision {
  position: absolute;
  top: 8px;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.btn-edit-decision {
  right: 40px;
  font-size: 12px;
}

.btn-delete-decision {
  right: 8px;
  font-size: 16px;
  line-height: 1;
}

.decision-card:hover .btn-edit-decision,
.decision-card:hover .btn-delete-decision {
  opacity: 1;
}

.btn-edit-decision:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.btn-delete-decision:hover {
  color: var(--danger);
  background: rgba(255, 107, 107, 0.1);
}

.dag-row {
  display: flex;
  flex-direction: row;
  gap: 24px;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
}

.dag-row::before {
  content: attr(data-depth);
  position: absolute;
  left: 0;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.5;
  padding: 4px 8px;
  background: var(--panel2);
  border-radius: 4px;
}

/* Merge button */
.btn-merge-event {
  right: 52px;
}

.decision-badge {
  position: absolute;
  bottom: 6px;
  right: 8px;
  font-size: 11px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  pointer-events: none;
}

/* Developer View */
.developer-view {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.btn--secondary {
  background: transparent;
  border-color: var(--border);
}

.btn--secondary:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.btn--active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.mapping-header {
  margin-bottom: 24px;
  padding: 16px;
  background: var(--panel2);
  border-radius: var(--radius);
}

.event-grain-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
}

.grain-label {
  color: var(--muted);
  font-size: 13px;
}

.grain-sentence {
  color: var(--text);
}

.grain-part {
  color: var(--accent);
  font-style: italic;
  font-weight: 500;
}

/* Catalog Registration */
.catalog-registration {
  margin-bottom: 32px;
  padding: 20px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.catalog-registration h3 {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.catalog-sections {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.add-table-form {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.catalog-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.catalog-section > label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 32px;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px 4px 12px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 16px;
  font-size: 13px;
  color: var(--accent);
}

.tag-remove {
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 14px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.tag-remove:hover {
  opacity: 1;
}

.add-catalog-form,
.add-schema-form {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.catalog-input {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.catalog-input:focus {
  border-color: var(--accent);
}

.catalog-input::placeholder {
  color: var(--muted);
}

.catalog-select {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 13px;
  outline: none;
  cursor: pointer;
  min-width: 140px;
}

.catalog-select:focus {
  border-color: var(--accent);
}

.mapping-sections {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

/* Add extra separation between stacked mapping sections */
.mapping-section + .mapping-section {
  margin-top: 24px;
}

.mapping-section h3 {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Extra spacing before bus matrix block */
.bus-matrix-section {
  margin-top: 48px;
}

.mapping-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.mapping-table th,
.mapping-table td {
  padding: 10px 12px;
  border: 1px solid var(--border);
  text-align: left;
}

.mapping-table th {
  background: var(--panel2);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--muted);
}

.mapping-table td {
  vertical-align: middle;
}

.dimension-row {
  background: var(--accent-bg);
}

.attribute-row {
  background: transparent;
}

.attribute-row td:first-child,
.attribute-row td:nth-child(2) {
  border-left-color: transparent;
  border-right-color: transparent;
}

.measure-row {
  background: var(--accent-bg);
}

.mapping-input {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.mapping-input:hover {
  background: var(--surface-2);
}

.mapping-input:focus {
  border-color: var(--accent);
  background: var(--panel2);
}

.mapping-input::placeholder {
  color: var(--muted);
  opacity: 0.5;
}

.mapping-select {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 13px;
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.mapping-select:hover {
  background: var(--surface-2);
}

.mapping-select:focus {
  border-color: var(--accent);
  background: var(--panel2);
}

.mapping-select option {
  background: var(--panel);
  color: var(--text);
}

/* Roadmap View */
.roadmap-container {
  padding: 0;
}

.roadmap-lanes {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.roadmap-lane {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.roadmap-lane__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--panel2);
  border-left: 4px solid var(--accent);
}

.roadmap-lane__label {
  font-weight: 600;
  font-size: 14px;
}

.roadmap-lane__count {
  font-size: 12px;
  color: var(--muted);
  background: var(--panel);
  padding: 2px 8px;
  border-radius: 12px;
}

.roadmap-lane__events {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.roadmap-event {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 16px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.roadmap-event:hover {
  border-color: var(--accent);
}

.roadmap-event__header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.roadmap-event__name {
  font-weight: 600;
  font-size: 14px;
}

.roadmap-event__desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.roadmap-event__questions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.roadmap-question {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
}

.roadmap-question__priority {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 6px;
  border-radius: 4px;
}

.roadmap-question__text {
  color: var(--text);
  line-height: 1.4;
}

.roadmap-question__text em {
  color: var(--muted);
  font-style: italic;
}

.roadmap-no-questions {
  font-size: 12px;
  margin: 0;
}

/* Utilities */
.muted {
  color: var(--muted);
}

.hidden {
  display: none !important;
}

/* ============================================
   Deep-Dive Decisions Section
   ============================================ */

.deep-dive-decisions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.deep-dive-decision {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.deep-dive-decision__content {
  flex: 1;
  min-width: 0;
}

.deep-dive-decision__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 4px;
}

.deep-dive-decision__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.deep-dive-decision__value {
  font-size: 12px;
  font-weight: 600;
  color: var(--ok);
  background: var(--success-bg);
  border: 1px solid var(--success);
  border-radius: 999px;
  padding: 2px 10px;
  flex-shrink: 0;
}

.deep-dive-decision__desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
  margin-bottom: 4px;
}

.deep-dive-decision__impact {
  font-size: 12px;
  color: var(--text);
  line-height: 1.4;
  font-style: italic;
}

.deep-dive-decision__actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

/* ============================================
   Question Decision Tags
   ============================================ */

.question-decision-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.decision-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 3px 10px;
}

.decision-tag__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-left: 2px;
  margin-right: -4px;
  border: none;
  background: transparent;
  color: var(--accent);
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  transition: background 0.15s, color 0.15s;
}

.decision-tag__remove:hover {
  background: var(--danger-bg);
  color: var(--danger);
}

.decision-tag-add {
  display: inline-block;
}

.decision-tag-select {
  font-size: 11px;
  color: var(--muted);
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: 999px;
  padding: 3px 10px;
  cursor: pointer;
}

.decision-tag-select:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.decision-tag-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Import Modal */
.file-input {
  width: 100%;
  padding: 12px;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
}

.file-input:hover {
  border-color: var(--accent);
}

.file-input::file-selector-button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 12px;
}

.field-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--muted);
  margin: 16px 0;
}

.field-divider::before,
.field-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.field-divider span {
  padding: 0 12px;
  font-size: 0.85rem;
}

.import-error {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 12px;
  border-radius: var(--radius);
  margin-top: 12px;
  font-size: 0.9rem;
}

.import-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
}

.import-preview h3 {
  margin: 0 0 12px;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.preview-item {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.preview-events {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.preview-event {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-priority {
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--bg);
  padding: 2px 6px;
  border-radius: 3px;
}

/* Responsive */
@media (max-width: 640px) {
  .layout {
    padding: 16px;
  }

  .grain-inputs {
    grid-template-columns: 1fr;
  }

  .card-list {
    grid-template-columns: 1fr;
  }
}