@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:ital,wght@0,400;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;700&display=swap');

:root { 
  --ink: #f2e8dc; 
  --muted: #b7aa97; 
  --paper: #121212; 
  --panel: #1b1b1b; 
  --line: #2f2a24; 
  --border: var(--line);
  --accent: #a53f41; 
  --crimson-light: #c85a5d;
  --cream-white: #f7f1e6;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 8px;
}

* { box-sizing: border-box; }

body { 
  margin: 0; 
  color: var(--ink); 
  background: radial-gradient(circle at top left, rgba(132, 22, 23, 0.16), transparent 28%), var(--paper); 
  font: 16px/1.7 'Inter', 'Segoe UI', Roboto, Arial, sans-serif; 
  -webkit-font-smoothing: antialiased;
}

body::before { content: ''; display: block; height: 6px; background: linear-gradient(90deg, var(--accent), var(--crimson-light)); }

a { color: inherit; text-decoration-color: rgba(132, 22, 23, 0.3); }

.topbar { 
  border-bottom: 2px solid var(--accent); 
  padding: 1.25rem max(6vw, 2rem); 
  font: 700 13px 'Inter', sans-serif; 
  text-transform: uppercase;
  letter-spacing: .12em; 
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: rgba(18, 18, 18, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}

.topbar a { text-decoration: none; color: var(--accent); transition: color 0.2s; }
.topbar a:hover { color: var(--crimson-light); }

.topnav {
  display: flex;
  gap: 1.5rem;
  justify-content: flex-end;
  align-items: center;
  flex-wrap: wrap;
}

.topnav a {
  white-space: nowrap;
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.75rem clamp(16px, 4vw, 20px);
  }

  .topbar > a:first-child {
    line-height: 1.3;
    font-size: 0.75rem;
  }

  .topnav {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .topnav::-webkit-scrollbar {
    display: none;
  }

  .topnav a {
    scroll-snap-align: start;
    flex-shrink: 0;
    padding: 0.75rem 0;
  }
}

.shell { 
  /* slightly narrower centered shell for better page rhythm */
  width: min(980px, calc(100% - clamp(20px, 4vw, 64px) * 2));
  margin: 0 auto;
  padding: 3rem clamp(20px, 4vw, 32px) 6rem;
}

.hero { margin-bottom: 4rem; text-align: left; }

.eyebrow { 
  color: var(--accent); 
  font: 700 12px 'Inter', sans-serif; 
  letter-spacing: .15em; 
  text-transform: uppercase; 
  margin-bottom: 1rem;
  display: block;
  opacity: 0.8;
}

h1, h2, h3 { font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif; font-weight: 700; color: var(--cream-white); margin-top: 0; }

h1 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.04; margin: 0 0 1.25rem; letter-spacing: -0.035em; max-width: none; text-align: left; }
h2 { font-size: 1.6rem; margin: 4rem 0 1.25rem; display: flex; align-items: center; gap: 1rem; }
h2::after { content: ''; flex: 1; height: 1px; background: linear-gradient(90deg, rgba(197, 90, 93, 0.5), transparent); }
h3 { font-size: 1.1rem; margin: 2rem 0 0.5rem; color: var(--accent); }

.lede { font-size: 1.06rem; line-height: 1.7; color: var(--cream-white); margin: 0 0 2.25rem; max-width: 56ch; text-align: left; }

.hero-subheading {
  margin: -0.35rem 0 1.35rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.5;
}

p { margin-bottom: 1.25rem; color: rgba(247, 241, 230, 0.9); }

.workflow-list {
  margin: 0 0 1.5rem 1.25rem;
  padding-left: 1rem;
  color: var(--ink);
  font-family: 'Inter', sans-serif;
}

.workflow-list li {
  margin-bottom: 0.85rem;
}

.workflow-list li::marker {
  color: var(--accent);
  font-weight: 700;
}

.method-overview {
  margin-top: 4.5rem;
}

.method-overview > h2 {
  margin-top: 0;
}

.method-overview > p:not(.eyebrow) {
  max-width: 70ch;
}

.method-paragraphs {
  margin-top: 2rem;
  max-width: 78ch;
}

.method-paragraph {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.75;
}

.method-paragraph strong {
  color: var(--cream-white);
  font-weight: 700;
}

.method-paragraph + .method-paragraph {
  margin-top: 1.25rem;
}

.choices { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
  gap: 1.5rem; 
  margin-top: 4rem; 
}

.choices--training {
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.choice { 
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); 
  border: 1px solid var(--line); 
  padding: 2.25rem; 
  text-decoration: none; 
  transition: all .3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.choice:hover { 
  border-color: var(--accent); 
  background: #202020; 
  transform: translateY(-8px); 
  box-shadow: var(--shadow);
}

.choice h2 { 
  margin-bottom: 1rem; 
  border: 0; 
  padding: 0; 
  font-size: 1.3rem; 
}
.choice h2::after { display: none; }

.choice p { 
  margin-bottom: 2rem; 
  font-size: 0.95rem; 
  color: var(--muted); 
  font-family: 'Inter', sans-serif; 
  flex: 1;
  line-height: 1.65;
}

.flash-stack {
  display: grid;
  gap: 0.85rem;
}

.flash-stack--global {
  margin-bottom: 2rem;
}

.flash-stack--form {
  margin: 1.5rem 0 2rem;
}

.platform-note {
  margin-bottom: 2rem;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--accent);
  background: rgba(132, 22, 23, 0.05);
  color: var(--ink);
}

.flash {
  --flash-color: #8aa7c2;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1rem 1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--flash-color) 42%, var(--line));
  border-left: 5px solid var(--flash-color);
  border-radius: var(--radius);
  background: linear-gradient(135deg, color-mix(in srgb, var(--flash-color) 13%, var(--panel)), var(--panel));
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.28);
  animation: flash-enter 0.22s ease-out;
}

.flash.success { --flash-color: #70b487; }
.flash.error { --flash-color: #e26d70; }
.flash.warning { --flash-color: #d8a55c; }
.flash.info { --flash-color: #8aa7c2; }

.flash-mark {
  display: grid;
  flex: 0 0 1.7rem;
  width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  border: 1px solid var(--flash-color);
  border-radius: 50%;
  color: var(--flash-color);
  font: 700 0.9rem/1 'IBM Plex Mono', monospace;
}

.flash-body {
  min-width: 0;
  flex: 1;
}

.flash-title {
  display: block;
  color: var(--flash-color);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.flash-body p {
  margin: 0.15rem 0 0;
  color: var(--ink);
  line-height: 1.45;
}

.flash-dismiss {
  flex: 0 0 2rem;
  width: 2rem;
  height: 2rem;
  margin: -0.2rem -0.25rem 0 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
}

.flash-dismiss:hover,
.flash-dismiss:focus-visible {
  border-color: var(--flash-color);
  color: var(--flash-color);
}

@keyframes flash-enter {
  from { opacity: 0; transform: translateY(-0.35rem); }
  to { opacity: 1; transform: translateY(0); }
}

.form-panel--spaced {
  margin-top: 2rem;
}

.training-layout {
  display: grid;
  /* center the training grid inside the shell and give the right column a fixed readable width */
  max-width: 980px;
  margin: 1.5rem auto 0;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  align-items: start;
}

.training-form-panel {
  margin-top: 0;
  width: 100%;
}

.dataset-list {
  margin-top: 3rem;
}

.dataset-table {
  width: 100%;
  font-size: 0.8rem;
  border-collapse: collapse;
  margin: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.dataset-table thead tr {
  text-align: left;
  border-bottom: 2px solid var(--border);
}

.dataset-table th,
.dataset-table td {
  padding: 0.75rem;
}

.dataset-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.dataset-table tbody tr:last-child {
  border-bottom: 0;
}

.dataset-actions {
  white-space: nowrap;
}

.dataset-delete-form {
  margin: 0;
}

.dataset-delete-form button.btn-danger {
  background: #6f292c;
  padding: 0.45rem 0.7rem;
  font-size: 0.78rem;
}

.dataset-delete-form button.btn-danger:hover {
  background: #8f3437;
}

.dataset-readonly {
  color: var(--muted);
  font-size: 0.8rem;
}

.dataset-ready-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.6rem;
  border: 1px solid rgba(112, 180, 135, 0.45);
  border-radius: 999px;
  color: #9bd2ab;
  font-size: 0.78rem;
  font-weight: 700;
}

.model-actions {
  white-space: nowrap;
}

.model-delete-form {
  margin: 0;
}

.model-delete-form button.btn-danger {
  background: #6f292c;
  padding: 0.45rem 0.7rem;
  font-size: 0.78rem;
}

.model-delete-form button.btn-danger:hover {
  background: #8f3437;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.action { 
  font-weight: 700; 
  font-family: 'Inter', sans-serif; 
  font-size: 0.85rem; 
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent); 
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action::after { content: '→'; transition: transform 0.2s; }
.choice:hover .action::after { transform: translateX(4px); }

.training-guide {
  margin-top: 2rem;
  padding: 1.75rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.training-guide--sidebar {
  margin-top: 0;
  height: 100%;
}

/* Put method-specific guide at top and keep it visible while scrolling */
.training-guide--sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.method-guide-top {
  /* Keep the method guide in normal flow so it doesn't overlay static content */
  position: static;
  width: 100%;
  box-sizing: border-box;
}

.method-guide-card {
  padding: 0.6rem 0.9rem;
  border-left: 3px solid rgba(165,63,65,0.95);
  background: var(--panel); /* fully opaque to avoid ghosting underlying content */
  border: 1px solid rgba(255,255,255,0.02);
  color: var(--ink);
  box-shadow: 0 8px 20px rgba(0,0,0,0.28);
  border-radius: 8px;
  margin-bottom: 0.6rem; /* create spacing so shared inputs sit clearly below */
}

.method-guide-card h3 { margin: 0 0 0.25rem; color: var(--accent); font-size: 1rem; }
.method-guide-card .method-summary { color: var(--muted); font-size: 0.9rem; margin: 0 0 0.5rem; }

@media (max-width: 900px) {
  .method-guide-top { position: static; top: auto; }
  .training-guide--sidebar { order: 0; }
}

.training-guide-lede {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
}

/* Shared inputs: compact, higher-contrast titles and smaller overall text for fit */
.training-guide-general {
  font-size: 0.92rem;
  color: var(--muted);
  padding-top: 0.25rem;
}
.shared-inputs-title {
  font-size: 1rem;
  margin: 0 0 0.4rem;
  color: var(--cream-white);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.shared-inputs-note {
  font-size: 0.84rem;
  color: var(--muted);
  font-weight: 600;
  opacity: 0.95;
}
.training-guide-shared-list {
  margin: 0.35rem 0 0;
  padding-left: 0.9rem;
}
.training-guide-shared-list li {
  margin-bottom: 0.6rem;
  line-height: 1.42;
  color: var(--muted);
}
.training-guide-shared-list li strong {
  color: var(--cream-white);
  font-weight: 800;
  display: inline-block;
  min-width: 8.25rem;
  margin-right: 0.5rem;
}

@media (max-width: 900px) {
  .training-guide-shared-list li strong { min-width: 0; display: block; margin: 0 0 0.25rem 0; }
  .shared-inputs-note { display: none; }
}

.training-guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  grid-auto-rows: min-content;
}

.training-guide-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.03);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 1rem 1rem 1.05rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.015), 0 8px 20px rgba(0,0,0,0.18);
}

.training-guide-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

.training-guide-card p {
  margin: 0 0 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  color: var(--muted);
}

.training-guide-card p:last-child {
  margin-bottom: 0;
}

.training-guide-list {
  margin: 0.5rem 0 1rem 1.05rem;
  padding-left: 1rem;
  color: var(--muted);
}

.back { 
  display: inline-flex; 
  align-items: center;
  gap: 0.5rem;
  color: var(--muted); 
  text-decoration: none; 
  margin-bottom: 2.5rem; 
  font: 600 13px 'Inter', sans-serif; 
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all 0.2s; 
}
.back:hover { color: var(--accent); transform: translateX(-4px); }

.page-heading { margin-bottom: 4rem; border-bottom: 1px solid var(--line); padding-bottom: 2rem; }
.page-heading h1 { font-size: 3rem; margin-bottom: 1rem; }
.page-heading .lede { margin: 0; text-align: left; }

/* Left-aligned variant for page headings (training, manage pages) */
.page-heading--left {
  text-align: left;
}
.page-heading--left h1 {
  margin: 0 0 1rem; /* remove auto centering */
  max-width: none;
  text-align: left;
}

/* Stack the explorer header so the help text sits below the eyebrow and aligns left */
.explorer-nav-header--stacked {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  margin: 1rem 0 1rem;
}
.explorer-nav-header--stacked .explorer-nav-help {
  margin: 0;
  max-width: 60ch;
  color: var(--muted);
}

.dataset-picker { background: var(--panel); padding: 2rem; border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 3rem; }

.schema-dictionary {
  margin: 2rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.schema-dictionary summary {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 1rem 0;
  color: var(--cream-white);
  cursor: pointer;
}

.schema-dictionary summary strong {
  font-size: 1.05rem;
}

.schema-dictionary-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

.schema-dictionary [data-dictionary-status] {
  margin: 0 0 1rem;
}

code { font-family: 'IBM Plex Mono', monospace; background: rgba(197, 90, 93, 0.14); padding: 0.2rem 0.4rem; font-size: 0.85em; border-radius: 4px; color: var(--accent); }

.form-panel { 
  background: linear-gradient(135deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)); 
  border: 1px solid var(--line); 
  padding: 3rem; 
  margin: 2.5rem 0;
  border-radius: var(--radius);
  box-shadow: 0 18px 40px rgba(0,0,0,0.22);
}

label { display: block; font-weight: 700; margin-bottom: 1.5rem; font-family: 'Inter', sans-serif; font-size: 0.9rem; color: var(--accent); }
input, select, textarea { 
  display: block; 
  width: 100%; 
  border: 1px solid var(--line); 
  background: rgba(31, 29, 26, 0.95); 
  color: var(--ink); 
  font: 16px 'Inter', sans-serif; 
  margin-top: 0.6rem; 
  padding: 0.85rem 1.25rem; 
  border-radius: 10px;
  transition: all 0.2s;
  resize: vertical;
}

input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(132, 22, 23, 0.1); }

.intake-mode-fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.intake-mode-fieldset legend {
  display: block;
  margin: 0;
  padding: 0;
  font: 700 0.9rem/1.7 'Inter', sans-serif;
  color: var(--accent);
}

.intake-mode-warning {
  margin: 0.25rem 0 0;
  padding: 0.7rem 0.85rem;
  border-left: 3px solid #d8a55c;
  background: rgba(216, 165, 92, 0.08);
  color: #e6c28f;
  font-size: 0.84rem;
  line-height: 1.45;
}

.intake-mode-warning[hidden] {
  display: none;
}

.mapping-table {
  margin-top: 1rem;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

.mapping-header,
.mapping-row {
  display: grid;
  grid-template-columns: minmax(15rem, 1fr) minmax(18rem, 1.25fr) minmax(16rem, 1fr);
  min-width: 52rem;
  column-gap: 1rem;
}

.mapping-header {
  padding: 0.7rem 1rem;
  color: var(--muted);
  font: 700 0.72rem/1.2 'Inter', sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mapping-row {
  align-items: center;
  padding: 0.9rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.015);
}

.mapping-row:nth-child(odd) {
  background: rgba(255, 255, 255, 0.03);
}

.mapping-schema-field strong {
  display: block;
  color: var(--cream-white);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
}

.mapping-schema-field small {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.35;
}

.mapping-row label {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.mapping-row select {
  margin-top: 0.35rem;
  padding: 0.65rem 0.8rem;
  font-size: 0.88rem;
}

.mapping-label {
  display: block;
}

.mapping-operation {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.4;
}

.mapping-operation label {
  margin: 0;
}

.mapping-operation[data-operation="convert"] {
  color: #e6c28f;
  font-weight: 700;
}

.validation-field-table {
  width: 100%;
  margin-top: 1rem;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.validation-field-table th,
.validation-field-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

.validation-field-table th {
  color: var(--muted);
  font: 700 0.72rem/1.2 'Inter', sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.validation-field-table td:first-child {
  color: var(--cream-white);
  font-weight: 700;
}

.validation-field-table select {
  min-width: 15rem;
  margin: 0;
  padding: 0.6rem 0.8rem;
  font-size: 0.88rem;
}

.plot-result { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); margin: 4rem 0; padding: 3rem; text-align: center; }
.plot-result img { display: block; margin: 0 auto; max-width: 100%; height: auto; border-radius: 4px; }

.chart-frame {
  margin-top: 2.5rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-align: left;
}

.chart-frame h2 {
  margin: 0 0 1rem;
}

.chart-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.chart-explanation { 
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 2rem 0;
  margin: 3rem 0;
  font-family: 'Crimson Pro', serif;
  font-size: 1.1rem;
}

.chart-explanation .eyebrow { margin-bottom: 0.75rem; }

.chart-explanation--intro {
  margin-top: 0;
  margin-bottom: 2rem;
}

.plot-form-header {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.plot-form-title {
  margin: 0.15rem 0 0;
  color: var(--cream-white);
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
}

.plot-guidance {
  max-width: 58ch;
  margin: 0;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  line-height: 1.65;
}

.plot-mode-summary {
  margin: 0 0 0.45rem;
  padding: 0.65rem 0.9rem;
  border: 1px solid rgba(197, 90, 93, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
}

.plot-dimension-fieldset {
  margin: 0 0 0.5rem;
  padding: 0;
  border: 0;
}

.plot-dimension-fieldset legend {
  margin-bottom: 0.75rem;
  padding: 0;
  color: var(--accent);
  font: 700 12px 'Inter', sans-serif;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.dimension-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  padding: 0.12rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.02);
  overflow: hidden;
}

.dimension-chip {
  position: relative;
  display: block;
  cursor: pointer;
  min-height: 3rem;
}

.dimension-chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.dimension-chip span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.6rem 0.9rem;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.dimension-chip:hover span,
.dimension-chip:focus-within span {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
}

.dimension-chip input:checked + span {
  background: linear-gradient(180deg, rgba(132, 22, 23, 0.28), rgba(132, 22, 23, 0.12));
  color: var(--cream-white);
  box-shadow: inset 0 0 0 1px rgba(197, 90, 93, 0.32);
}

.axis-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.axis-field select:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.plotly-container {
  overflow-x: auto;
  padding: 0.35rem 0;
}

.explorer-nav-header {
  display: flex;
  /* Stack eyebrow and help vertically and align to the left on all pages */
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.65rem;
  margin: 2rem 0 1rem;
}

.explorer-nav-help {
  margin: 0;
  max-width: 60ch;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  text-align: left;
}

.explorer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}

.explorer-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 4.75rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.015));
  color: var(--muted);
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.explorer-nav a span {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  line-height: 1.25;
}

.explorer-nav a:hover,
.explorer-nav a.active {
  border-color: rgba(132, 22, 23, 0.55);
  background: linear-gradient(180deg, rgba(132, 22, 23, 0.1), rgba(255,255,255,0.04));
  color: var(--accent);
  box-shadow: 0 16px 30px rgba(0,0,0,0.18);
  transform: translateY(-2px);
}

.explorer-nav a.active::after {
  content: '';
  display: block;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--crimson-light));
}

@media (max-width: 900px) {
  .explorer-nav-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .explorer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .explorer-nav {
    grid-template-columns: 1fr;
  }
}

.chart-source {
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.source-link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

/* Dataset inspection panel */
.dataset-inspect {
  margin-top: 1rem;
  padding: 1rem;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.03);
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.18);
}
.dataset-inspect h4 { margin: 0 0 0.5rem; font-size: 0.95rem; color: var(--accent); }
.inspect-summary { color: var(--muted); font-size: 0.95rem; }
.inspect-summary.inspect-warning { color: #ffb4b6; font-weight: 600; }

/* Structured inspection layout */
.inspect-grid { display: grid; gap: 0.45rem; }
.inspect-row { display: grid; grid-template-columns: 110px 1fr; gap: 0.6rem; align-items: start; }
.inspect-key { color: var(--muted); font-weight: 700; }
.inspect-value { color: var(--ink); }
.small-muted { color: var(--muted); font-size: 0.9rem; }
.compact-list { margin: 0; padding-left: 1.05rem; list-style: disc; }
.method-summary { margin: 0.25rem 0 0.85rem; color: var(--muted); font-size: 0.95rem; }

.inspect-legend {
  margin: 0.9rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

.prep-config-controls[hidden],
.prep-ready-state[hidden] {
  display: none;
}

.feature-set-choice {
  min-width: 0;
  margin: 1.5rem 0;
  padding: 0;
  border: 0;
}

.feature-set-choice legend {
  padding: 0;
  color: var(--cream-white);
  font-size: 1.05rem;
  font-weight: 700;
}

.feature-set-choice > .field-help {
  display: block;
  max-width: 72ch;
  margin: 0.25rem 0 1rem;
}

.feature-set-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature-set-card {
  position: relative;
  display: block;
  margin: 0;
  color: var(--ink);
  cursor: pointer;
}

.feature-set-card > input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  opacity: 0;
  pointer-events: none;
}

.feature-set-card-content {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.045), rgba(255,255,255,0.015));
  transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.feature-set-card:hover .feature-set-card-content,
.feature-set-card > input:focus-visible + .feature-set-card-content {
  border-color: rgba(197, 90, 93, 0.68);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
}

.feature-set-card > input:checked + .feature-set-card-content {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(165, 63, 65, 0.17), rgba(255,255,255,0.025));
  box-shadow: inset 0 0 0 1px rgba(197, 90, 93, 0.24), 0 12px 28px rgba(0, 0, 0, 0.22);
}

.feature-set-card-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.feature-set-card-heading strong {
  color: var(--cream-white);
  font-size: 1rem;
}

.feature-set-card-count {
  flex: 0 0 auto;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.feature-set-card-description {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 400;
  line-height: 1.45;
}

.feature-set-card-field-label {
  color: var(--cream-white);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.feature-set-card-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.feature-set-card-fields code {
  padding: 0.15rem 0.35rem;
  font-size: 0.72rem;
}

.feature-set-card-results {
  display: grid;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.35;
}

.feature-set-result {
  display: grid;
  gap: 0.12rem;
  padding-left: 0.65rem;
  border-left: 2px solid rgba(112, 180, 135, 0.68);
}

.feature-set-result.is-unusable {
  border-left-color: #e26d70;
}

.feature-set-result strong {
  color: var(--cream-white);
  font-size: 0.78rem;
}

.feature-set-result span {
  color: var(--ink);
}

.feature-set-result small {
  color: var(--muted);
  font-size: 0.72rem;
}

.prep-strategy-list {
  margin: 0 0 1.25rem;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.prep-strategy-list li { margin-bottom: 0.35rem; }
.prep-strategy-list strong { color: var(--ink); }

.prep-ready-state {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border: 1px solid rgba(112, 180, 135, 0.42);
  border-left: 5px solid #70b487;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(112, 180, 135, 0.12), rgba(255,255,255,0.02));
}

.prep-ready-badge {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: #9bd2ab;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.prep-ready-state h4 {
  margin: 0;
  color: var(--cream-white);
  font-size: 1.05rem;
}

.prep-ready-state p {
  margin: 0.35rem 0;
  color: var(--ink);
}

.prep-ready-state small { color: var(--muted); }

@media (max-width: 700px) {
  .feature-set-grid { grid-template-columns: 1fr; }
  .feature-set-card-heading { align-items: flex-start; flex-direction: column; gap: 0.2rem; }
}

/* Global button styles */
button, .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(180deg, var(--accent), var(--crimson-light));
  color: var(--cream-white);
  border: none;
  padding: 0.65rem 0.95rem;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, opacity 0.12s ease;
  box-shadow: 0 6px 18px rgba(165,63,65,0.12);
}
button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(165,63,65,0.16); }
button:active { transform: translateY(0); }
button[disabled], .btn[disabled] { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }

/* Back-to-top button for plot results */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 120;
  display: none;
  align-items: center;
  gap: 0.5rem;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.6rem 0.9rem;
  border-radius: 999px;
  box-shadow: 0 12px 36px rgba(0,0,0,0.32);
  font-weight: 700;
  cursor: pointer;
}
.back-to-top.visible { display: inline-flex; }
.back-to-top:focus { outline: none; box-shadow: 0 0 0 4px rgba(132,22,23,0.12); }

@media (max-width: 640px) {
  .back-to-top { right: 12px; bottom: 12px; }
}

/* Plot spinner overlay */
.plot-spinner-overlay {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}
.plot-spinner-overlay.visible { opacity: 1; pointer-events: auto; }
.plot-spinner-overlay .spinner-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  background: rgba(27,27,27,0.92);
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.plot-spinner {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 6px solid rgba(255,255,255,0.08);
  border-top-color: var(--accent);
  animation: spin 1s linear infinite;
  box-shadow: 0 10px 24px rgba(0,0,0,0.36);
}
@keyframes spin { to { transform: rotate(360deg); } }
.spinner-label { color: var(--cream-white); font-weight: 700; font-size: 1rem; }

/* Inline variant: attach the spinner inside the plot container so it hovers over
   the area where the generated image or plot will appear. */
.plot-spinner-overlay.inline {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.28);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Placeholder inserted when navigating — ensures reserved space for the spinner */
.plot-placeholder {
  min-height: 260px;
  position: relative;
}

.plot-loading-placeholder {
  min-height: 320px;
}

.plot-loading-placeholder--3d {
  min-height: 560px;
}

/* Ensure plot result sections can host an absolute inline overlay */
.plot-result { position: relative; }

/* Ensure page headings and explorer headers are left-aligned; use higher-specificity rules
   to avoid accidental centering from earlier global h1 rules. */
.page-heading, .page-heading.page-heading--left {
  text-align: left !important;
}
.page-heading.page-heading--left h1 {
  margin-left: 0 !important;
  margin-right: 0 !important;
  max-width: none !important;
  text-align: left !important;
}
.page-heading .lede, .explorer-nav-header--stacked, .explorer-nav-header--stacked .explorer-nav-help {
  text-align: left !important;
}

/* Make explorer header content align to the start to avoid baseline/end alignment oddities */
.explorer-nav-header { align-items: flex-start; }