/* Global Styles and Theme Tokens */
:root {
  --app-bg: #f5f7fb;
  --app-card-bg: #ffffff;
  --app-text: #1f2a37;
  --app-muted: #5f6b7a;
  --app-border: #d6dfea;
  --app-accent: #2a7de1;
  --app-accent-dark: #1a5fb4;
  --app-success: #2f9d58;
  --app-danger: #d64747;
  --app-warning: #f3b440;
  --confidence-accent: #2a7de1;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: var(--app-bg);
  color: var(--app-text);
}

.app-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: clamp(1rem, 4vw, 3rem);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.app-footer {
  padding: 1.5rem clamp(1rem, 4vw, 3rem);
  background: #101828;
  color: #f9fbff;
  text-align: center;
}

.citation {
  font-size: 0.85rem;
  color: var(--app-muted);
  margin-top: 0.5rem;
}

h1, h2, h3 {
  color: #1e40af; /* Deep blue for titles */
}

/* Introductory Section */
.intro {
  margin-bottom: 30px;
  padding: 20px;
  border-left: 5px solid #3b82f6; /* Blue border to highlight context */
  background-color: #e0f2fe; /* Light blue background */
  border-radius: 8px;
}

.intro .equation {
  font-size: 16px;
  font-weight: normal;
  margin: 10px 0;
  background-color: #fff;
  padding: 5px 10px;
  border-radius: 4px;
  border: 1px solid #bae6fd;
}

.equation-section {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.equation-section p {
  margin: 0.75rem 0;
}

.equation-note {
  margin-top: 1.25rem;
  background: #f8f9fb;
  padding: 1.2rem;
  border-radius: 12px;
  border-left: 4px solid var(--app-accent);
}

.equation-note h3 {
  margin-top: 0;
  color: #1e40af;
}

.timestamp-meta {
  color: #555;
  font-size: 0.9rem;
}

.page-timestamps {
  margin-top: 16px;
  color: #555;
  font-size: 0.9rem;
}

.hero-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 1.5rem;
  border-radius: 12px;
  background: #e0f2fe;
  border-left: 5px solid #3b82f6;
}

.hero-header__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-header__top h1 {
  margin: 0;
}

.hero-header__lede {
  margin: 0;
  font-size: 1rem;
  color: #1f2933;
}

.hidden {
  display: none !important;
}

.card {
  background: var(--app-card-bg);
  border-radius: 12px;
  padding: clamp(1rem, 3vw, 2rem);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.dual-panels {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 2vw, 1.5rem);
}
.dual-panels .dual-panel {
  flex: 1 1 280px;
  min-width: 280px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e4e9f0;
  text-align: left;
}

.data-table th {
  background: #f1f4f8;
  color: #1e40af;
  font-weight: 600;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.technical-note {
  margin-top: 1.25rem;
  background: #f8f9fb;
  padding: 1.2rem;
  border-radius: 12px;
  border-left: 4px solid #c0392b;
}

.technical-note h3 {
  margin-top: 0;
  color: #1e40af;
}

/* Scenario / Context Sections */
.scenario-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.scenario-section p {
  margin: 0.75rem 0;
}

.scenario-section span {
  font-weight: 600;
  color: var(--app-accent);
}

.scenario-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.scenario-controls {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.visualization-options {
  margin-top: 1rem;
  border: 1px solid #e4e9f0;
  border-radius: 12px;
  background: var(--app-card-bg);
  overflow: hidden;
}
.visualization-options summary {
  font-weight: 600;
  padding: 0.9rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--app-accent);
  border-bottom: 1px solid #e4e9f0;
}
.visualization-options summary::-webkit-details-marker {
  display: none;
}
.visualization-options__body {
  padding: 1rem 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .scenario-controls {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }
}

.scenario-controls select,
.scenario-controls button {
  min-width: 220px;
}

/* Equation / input layouts for test tools */
.input-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.input-section > h2 {
  grid-column: 1 / -1;
  margin: 0 0 0.75rem;
}

.group-inputs,
.test-options {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

/* Form + Button Primitives */
select,
input,
button,
textarea {
  font-family: inherit;
}

select,
input[type="number"],
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea,
button {
  border-radius: 8px;
  border: 1px solid var(--app-border);
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
}

button {
  cursor: pointer;
  background: var(--app-accent);
  color: #fff;
  border: none;
  transition: background 0.2s ease;
}

button:hover,
button:focus-visible {
  background: var(--app-accent-dark);
}

button.secondary {
  background: transparent;
  border: 1px solid var(--app-border);
  color: var(--app-text);
}

button.secondary:hover,
button.secondary:focus-visible {
  background: rgba(42, 125, 225, 0.08);
}

.alpha-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.confidence-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.confidence-buttons .button-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.confidence-button {
  background: none;
  border: 1px solid var(--app-border);
  color: var(--app-muted);
}

.confidence-button.active {
  background: var(--confidence-accent, var(--app-accent));
  color: #fff;
  border-color: var(--confidence-accent, var(--app-accent));
}

.mode-toggle {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin: 1rem 0;
}

.mode-button {
  background: none;
  border: 1px solid var(--app-border);
  color: var(--app-text);
  padding: 0.75rem;
}

.mode-button.active {
  background: var(--app-accent);
  color: #fff;
  border-color: var(--app-accent);
}

/* Accordion/Details */
.advanced-card {
  padding-top: 0.5rem;
}

.advanced-details summary {
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  margin-bottom: 0.75rem;
}

.advanced-details summary::after {
  content: '▸';
  font-size: 1rem;
  color: var(--app-muted);
  margin-left: 0.5rem;
  transition: transform 0.2s ease;
}

.advanced-details summary::-webkit-details-marker {
  display: none;
}

.advanced-details[open] summary {
  margin-bottom: 1rem;
}

.advanced-details[open] summary::after {
  content: '▾';
}

.advanced-lede {
  margin-top: 0;
  color: var(--app-muted);
}

/* Upload Dropzone */
.dropzone {
  border: 2px dashed var(--app-border);
  border-radius: 14px;
  padding: 1rem;
  text-align: center;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.dropzone.drag-active {
  border-color: var(--app-accent);
  background: rgba(42, 125, 225, 0.04);
}

.dropzone-title {
  margin: 0;
  font-weight: 600;
}

.dropzone-note {
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
  color: var(--app-muted);
}

/* Template + Mode controls */
.template-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.data-import-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
}

.data-import-block h4 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.data-import-block p {
  margin: 0 0 0.65rem;
}

.data-import-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.data-entry-card .mode-panels {
  margin-top: 1rem;
}

.data-entry-card .group-controls,
.data-entry-card .group-input-block {
  margin: 0 0 1rem;
}

.data-entry-card .group-input-block:last-child {
  margin-bottom: 0;
}

.mode-panels {
  margin-top: 1.5rem;
}

.mode-panel {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
}

.mode-panel.active {
  display: flex;
}

.manual-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 0.25rem;
}

.manual-controls label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-weight: 600;
}

.manual-hint {
  margin: 0;
  color: var(--app-muted);
  font-size: 0.9rem;
}

/* Method selection cards */
.method-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.method-option {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--app-border);
  border-radius: 12px;
  align-items: flex-start;
}

.method-option input {
  margin-top: 0.3rem;
}

.method-title {
  font-weight: 600;
  display: block;
}

.method-note,
.method-reminder {
  margin: 0.15rem 0 0;
  color: var(--app-muted);
  font-size: 0.95rem;
}

/* Scenario instructions / QA box */
#questions {
  margin-top: 30px;
  padding: 20px;
  border: 1px solid #a5b4fc;
  background-color: #f0f4ff;
  border-radius: 8px;
}

#questions ol {
  margin: 15px 0;
  padding-left: 25px;
}

/* Input stacks & group cards */
.input-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.group-card {
  background: var(--app-card-bg);
  padding: 1.25rem;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.group-fields {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.45rem;
  color: #34495e;
}

.input-group input,
.input-group select,
.range-inputs input {
  width: 100%;
}

.input-group input:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--app-accent);
  box-shadow: 0 0 0 3px rgba(42, 125, 225, 0.18);
}

.range-inputs {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.input-group.inline {
  flex: 1 1 120px;
}

/* Chart + narrative cards */
.chart-card {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.chart-card h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.chart-narrative {
  margin-top: 1rem;
  background: #f8f9fb;
  padding: 1rem;
  border-radius: 12px;
  border-left: 4px solid #3b82f6;
  font-size: 0.95rem;
}

.chart-narrative strong {
  color: var(--app-text);
}

.narrative-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.result-card,
.diagnostic-item {
  border: 1px solid var(--app-border);
  border-radius: 12px;
  padding: 0.85rem;
  background: #fff;
}

.diagnostic-item.good {
  border-color: var(--app-success);
}

.diagnostic-item.caution {
  border-color: var(--app-warning);
}

.diagnostic-item.alert {
  border-color: var(--app-danger);
}

/* Interpretation + reporting */
.interpretation {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.interpretation h3 {
  color: #34495e;
  margin-top: 0;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}

.result-item {
  background: #f1f4f8;
  padding: 1rem;
  border-radius: 12px;
}

.result-item h4 {
  margin-top: 0;
}

.critical-thinking {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.critical-thinking ul {
  padding-left: 1.5rem;
}

/* Controls Layout */
.controls-container {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  margin-bottom: 30px;
}

.control-column {
  flex: 1 1 45%; /* Flexible columns */
  min-width: 300px;
  padding: 15px;
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.control-group {
  margin-bottom: 20px;
}

.control-group label {
  display: block;
  font-weight: bold;
  margin-bottom: 8px;
  color: #4b5563;
}

.control-group input[type="range"] {
  width: calc(100% - 100px);
  margin-right: 10px;
  vertical-align: middle;
}

.control-group input[type="number"] {
  width: 80px;
  padding: 5px;
  border: 1px solid #ccc;
  border-radius: 4px;
  vertical-align: middle;
}

.display-value {
  display: inline-block;
  min-width: 40px;
  text-align: right;
  font-weight: bold;
  color: #1e40af;
  margin-left: 10px;
}

.plain-language {
    font-size: 0.85em;
    color: #6b7280;
    margin-top: 5px;
    padding-left: 5px;
    border-left: 2px solid #a5b4fc;
}

/* Metrics and Output */
.metrics-panel {
  background-color: var(--app-card-bg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  border: 1px solid #e5e7eb;
}

.metric-output {
  font-size: 1rem;
  color: var(--app-text);
  margin-bottom: 0.5rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem;
}

.metric-output span {
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Increase only the dynamic values by 50% for emphasis */
.dynamic-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--app-text);
}



/* Separator Styling */
.separator {
  border: 0;
  border-top: 1px solid #ccc;
  margin: 30px 0;
}



/* Responsive adjustments */
@media (max-width: 768px) {
  .controls-container {
    flex-direction: column;
  }
  .control-column {
    min-width: 100%;
  }
}
.input-card .input-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
#layout helpers
.app-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
}

.row {
  display: grid;
  grid-template-columns: 1fr 120px;
  column-gap: 10px;
  align-items: center;
}

.row.single {
  grid-template-columns: 1fr;
}

.row.axis {
  grid-template-columns: 200px 1fr 100px 100px;
}

.divider {
  border-top: 1px dashed #d6dae6;
  margin: 14px 0;
}

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

.input-grid .input-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.input-grid input,
.input-grid select {
  width: 100%;
}

.hint {
  color: #6b7280;
  font-size: 0.95rem;
  margin-top: 8px;
}

.segmented {
  display: inline-flex;
  border: 1px solid #ccc;
  border-radius: 8px;
  overflow: hidden;
}

.segmented input {
  display: none;
}

.segmented label {
  padding: 6px 12px;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  font-size: 0.9rem;
  background: #f8f8f8;
  border-right: 1px solid #ddd;
}

.segmented label:last-child {
  border-right: none;
}

.segmented input:checked + label {
  background: #e9eefc;
  color: #0b48bf;
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.chart-settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.axis-card {
  border: 1px solid #e4e9f0;
  border-radius: 12px;
  padding: 1rem 1.2rem;
  background: #fafbfc;
}

.axis-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.switch-label,
.radio-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.radio-label input[type="radio"] {
  margin: 0;
  position: relative;
  top: 1px;
}

.dashed-panel {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed #cfd4e1;
  border-radius: 8px;
  background: #fafcff;
}

.summary-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.95rem;
}

.summary-table th,
.summary-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
}

.summary-table thead th {
  background: #eef3ff;
  font-weight: 600;
  color: #1f2a37;
  border-bottom: 1px solid #d8def0;
}

.summary-table tbody tr + tr td {
  border-top: 1px solid #eaedf5;
}

.summary-table tbody tr:hover td {
  background: #f9fbff;
}

.mono {
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.muted {
  color: #6b7280;
  font-size: 0.9rem;
}

.btn {
  padding: 6px 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #f8fafc;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover {
  background: #eef2f7;
}

fieldset {
  border: 1px solid #e0e6ef;
  border-radius: 12px;
  padding: 1rem;
  margin: 0;
  background: #fff;
}

legend {
  font-weight: 600;
  color: #34495e;
}

.summary-section {
  background: var(--app-card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.summary-section table {
  width: 100%;
  border-collapse: collapse;
}

.summary-section th,
.summary-section td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e4e9f0;
  text-align: left;
}

.summary-section th {
  background: #f1f4f8;
  color: #1e40af;
}

.summary-section tr:last-child td {
  border-bottom: none;
}

.visualization-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.plot-container {
  width: 100%;
  min-height: 320px;
}

.chart-placeholder {
  min-height: 320px;
  width: 100%;
  overflow: hidden;
}

.chart-note {
  font-size: 0.95rem;
  color: var(--app-text);
  margin-top: 0.75rem;
  background: #f8f9fb;
  padding: 1rem;
  border-radius: 12px;
  border-left: 4px solid #3b82f6;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.04);
}

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

.switch-option {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-weight: 600;
}

.switch-option.disabled {
  opacity: 0.6;
}
.upload-status {
  font-weight: 600;
  color: var(--app-muted);
  min-height: 1.2rem;
}

.upload-status.error {
  color: var(--app-danger);
}

.upload-status.success {
  color: var(--app-success);
}

/* Predictor Type Fieldset (reusable component) */
.predictor-type-group {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--app-border);
}

.predictor-type-group legend {
  font-size: 1rem;
}

.predictor-type-group .radio-label {
  display: inline-flex;
}

.predictor-type-warning {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--app-danger);
  background-color: rgba(214, 71, 71, 0.05);
  border-radius: 8px;
  display: none; /* Hidden by default */
}