/* ==========================================================================
   CSV Import Failure Triage — Global Styles
   Design intent: trustworthy · technical · calm · clean · diagnostic · practical
   ========================================================================== */

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

/* ─── Design tokens ─────────────────────────────────────────────────────────── */
:root {
  /* Core palette */
  --color-primary:       #2563eb;
  --color-primary-dark:  #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-text:          #1a1a2e;
  --color-text-muted:    #6b7280;
  --color-bg:            #f8f9fa;
  --color-surface:       #ffffff;
  --color-border:        #e5e7eb;
  --color-border-strong: #d1d5db;

  /* Semantic colours — never rely on colour alone; text/icon always present */
  --color-error:         #dc2626;
  --color-error-bg:      #fee2e2;
  --color-error-border:  #fca5a5;
  --color-warning:       #d97706;
  --color-warning-bg:    #fef3c7;
  --color-warning-border:#fcd34d;
  --color-success:       #059669;
  --color-success-bg:    #d1fae5;

  /* Status colours */
  --color-confirmed:        #065f46;
  --color-confirmed-bg:     #d1fae5;
  --color-confirmed-border: #6ee7b7;
  --color-likely:           #78350f;
  --color-likely-bg:        #fef3c7;
  --color-likely-border:    #fcd34d;
  --color-limited:          #991b1b;
  --color-limited-bg:       #fee2e2;
  --color-limited-border:   #fca5a5;

  /* Typography */
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Courier New', monospace;

  /* Shape */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Elevation */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.09);

  /* Layout */
  --max-width: 840px;
}

/* ─── Base ───────────────────────────────────────────────────────────────────── */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ─── Accessibility ─────────────────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -999px;
  left: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus {
  top: 0;
  left: 0.5rem;
}

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ─── Layout ────────────────────────────────────────────────────────────────── */
.app-main {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem 5rem;
}

.input-panel {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ─── App header ────────────────────────────────────────────────────────────── */
.app-header {
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-primary);
}

.app-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #1e3a5f;
  line-height: 1.2;
}

.app-description {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: 0.5rem;
  max-width: 60ch;
  line-height: 1.55;
}

/* ─── Form sections ─────────────────────────────────────────────────────────── */
.form-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.form-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: #1e3a5f;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1;
}

.step-optional {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

/* ─── CSV upload ────────────────────────────────────────────────────────────── */
.csv-upload-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.upload-label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
  display: block;
}

.drop-zone {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 2.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
  background: var(--color-bg);
  user-select: none;
}

.drop-zone:hover:not(.drop-zone--disabled),
.drop-zone:focus-visible:not(.drop-zone--disabled) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.drop-zone--dragging {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.drop-zone--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text-muted);
  pointer-events: none;
}

.drop-zone-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
}

.drop-zone-filename {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary);
  word-break: break-all;
}

.drop-zone-hint {
  font-size: 0.83rem;
  color: var(--color-text-muted);
}

.upload-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ─── CSV preview ───────────────────────────────────────────────────────────── */
.csv-preview {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.csv-preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.csv-preview-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.csv-preview-filename {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  word-break: break-all;
}

.csv-preview-stats {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.csv-table-wrapper {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 220px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.csv-preview-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  white-space: nowrap;
}

.csv-preview-table th,
.csv-preview-table td {
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--color-border);
  text-align: left;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.csv-preview-table thead th {
  background: #f1f5f9;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.78rem;
  position: sticky;
  top: 0;
  z-index: 1;
}

.row-num-col {
  color: var(--color-text-muted);
  width: 3.5rem;
  text-align: right;
  font-family: var(--font-mono);
}

.preview-truncation-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  font-style: italic;
}

.parse-warning {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-size: 0.84rem;
  color: var(--color-likely);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.parse-warning-item {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  margin-top: 0.15rem;
  color: var(--color-likely);
}

/* ─── Error input ───────────────────────────────────────────────────────────── */
.error-input-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.error-input-header {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.section-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.section-description {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

/* Tabs */
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--color-border);
}

.tab {
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: color 0.12s, border-color 0.12s;
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--color-primary);
}

.tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

/* Textarea */
.error-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.5;
  resize: vertical;
  color: var(--color-text);
  background: #fafafa;
  transition: border-color 0.15s;
}

.error-textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  background: var(--color-surface);
}

.error-textarea::placeholder {
  color: var(--color-text-muted);
  font-style: italic;
}

/* Error file upload area */
.upload-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  flex-wrap: wrap;
}

.upload-area-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.uploaded-filename {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  word-break: break-all;
}

.input-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  line-height: 1.4;
}

/* ─── Optional fields ───────────────────────────────────────────────────────── */
.optional-fields {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  gap: 0.4rem;
  align-items: baseline;
}

.field-optional {
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.text-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.15s;
}

.text-input:focus {
  border-color: var(--color-primary);
  outline: none;
}

.text-input--multiline {
  resize: vertical;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, opacity 0.15s;
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
}

.btn:disabled,
.btn[aria-disabled='true'] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-secondary {
  background: #f1f5f9;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-border);
}

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
  padding: 0;
  text-decoration: underline;
  line-height: inherit;
}

.btn-link:hover {
  color: var(--color-primary-dark);
}

.btn-analyze {
  width: 100%;
  padding: 0.875rem;
  font-size: 1rem;
  letter-spacing: 0.01em;
}

/* ─── Analyze action ─────────────────────────────────────────────────────────── */
.analyze-action {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.analyze-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ─── Loading / spinner ─────────────────────────────────────────────────────── */
.loading-state {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.spinner {
  display: inline-block;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--color-border-strong);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── Error / state messages ────────────────────────────────────────────────── */
.error-message {
  color: var(--color-error);
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-error-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-error-border);
  line-height: 1.45;
}

.error-recovery-hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-top: -0.25rem;
}

.error-state {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.state-message {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.state-message h2 {
  font-size: 1.15rem;
  color: #1e3a5f;
}

.state-message p,
.state-message ul {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.state-message ul {
  padding-left: 1.5rem;
}

.state-message li {
  margin-bottom: 0.2rem;
}

.state-message--error {
  border-color: var(--color-error-border);
  background: var(--color-error-bg);
}

.state-message--error h2 {
  color: var(--color-error);
}

/* ─── Analyzing progress ────────────────────────────────────────────────────── */
.analyzing-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.progress-container {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  transition: width 0.3s ease;
  border-radius: 4px;
}

.progress-label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  min-width: 2.5rem;
  text-align: right;
  font-family: var(--font-mono);
}

.progress-stage {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ─── Results view ──────────────────────────────────────────────────────────── */
.results-view {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.results-actions {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--color-primary);
}

.results-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e3a5f;
  line-height: 1.2;
}

.results-action-buttons {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Summary bar */
.summary-bar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.summary-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1e3a5f;
  margin-bottom: 1rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.summary-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  font-family: var(--font-mono);
}

.summary-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.coverage-message {
  font-size: 0.875rem;
  color: var(--color-likely);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.75rem;
  margin-top: 0.75rem;
  line-height: 1.45;
}

.limitations {
  margin-top: 0.75rem;
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.limitations-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-likely);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.limitations-list {
  font-size: 0.82rem;
  color: var(--color-likely);
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

/* Patterns section */
.patterns-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.patterns-section .section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1e3a5f;
}

.patterns-intro {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.patterns-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.no-patterns {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ─── Pattern cards ─────────────────────────────────────────────────────────── */
.pattern-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.pattern-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid var(--color-border);
  background: #f8fafd;
}

.pattern-card-priority {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.55rem;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 0.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pattern-card-heading {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

.pattern-title {
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.pattern-badges {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.2em;
  padding: 0.15em 0.5em;
  border-radius: 3px;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
}

.badge--confirmed {
  background: var(--color-confirmed-bg);
  color: var(--color-confirmed);
  border-color: var(--color-confirmed-border);
}

.badge--likely {
  background: var(--color-likely-bg);
  color: var(--color-likely);
  border-color: var(--color-likely-border);
}

.badge--limited {
  background: var(--color-limited-bg);
  color: var(--color-limited);
  border-color: var(--color-limited-border);
}

.badge--conf-high {
  background: #eff6ff;
  color: #1e3a8a;
  border-color: #bfdbfe;
}

.badge--conf-medium {
  background: var(--color-bg);
  color: var(--color-text-muted);
  border-color: var(--color-border);
}

.badge--conf-low {
  background: var(--color-bg);
  color: var(--color-text-muted);
  border-color: var(--color-border);
  opacity: 0.85;
}

/* Pattern body */
.pattern-card-body {
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.pattern-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  padding: 0.7rem 0.9rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
}

.meta-item {
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.meta-label {
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  flex-shrink: 0;
}

.meta-value {
  color: var(--color-text);
  font-size: 0.84rem;
}

.meta-sub {
  color: var(--color-text-muted);
  font-size: 0.76rem;
}

/* Pattern section sub-headers */
.pattern-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.pattern-section-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.pattern-explanation {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.55;
}

.pattern-priority-reason {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.pattern-recommendation {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.55;
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  padding: 0.65rem 0.85rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Evidence list */
.evidence-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.evidence-item {
  font-size: 0.82rem;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.evidence-label {
  font-weight: 600;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.evidence-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text);
  background: var(--color-bg);
  padding: 0.05em 0.3em;
  border-radius: 3px;
  border: 1px solid var(--color-border);
  word-break: break-all;
}

.evidence-inferred {
  font-size: 0.74rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.no-evidence {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Affected rows */
.affected-rows {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.rows-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.rows-table th,
.rows-table td {
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.rows-table th {
  background: #f1f5f9;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-text-muted);
}

.row-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary);
}

.row-physical {
  font-size: 0.72rem;
  color: var(--color-text-muted);
}

.row-value code {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  word-break: break-all;
}

.rows-truncation {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.1rem;
}

.no-rows {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Details / summary expansion */
.pattern-details {
  border-top: 1px solid var(--color-border);
  padding-top: 0.8rem;
}

.pattern-details-summary {
  font-size: 0.82rem;
  color: var(--color-primary);
  cursor: pointer;
  font-weight: 600;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

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

.pattern-details-summary::before {
  content: '▶';
  font-size: 0.6rem;
  transition: transform 0.15s;
}

details[open] > .pattern-details-summary::before {
  transform: rotate(90deg);
}

.pattern-details-body {
  margin-top: 0.85rem;
}

/* Results footer */
.results-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.file-info {
  font-size: 0.84rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ─── Site footer ───────────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.25rem 1rem;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .app-title { font-size: 1.35rem; }
  .results-title { font-size: 1.2rem; }
  .results-actions { flex-direction: column; }
  .results-action-buttons { width: 100%; flex-direction: column; }
  .results-action-buttons .btn { width: 100%; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .pattern-card-header { flex-direction: column; gap: 0.5rem; }
  .pattern-meta { flex-direction: column; }
  .form-section { padding: 1rem; }
  .analyzing-state { padding: 1.5rem; }
  .drop-zone { padding: 1.5rem 1rem; }
}

@media (max-width: 400px) {
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .pattern-badges { gap: 0.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; border-top-color: var(--color-primary); }
  .progress-fill { transition: none; }
}

/* ─── Site Navigation Header ─────────────────────────────────────────────────── */
.site-nav-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.site-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: #1e3a5f;
  font-weight: 700;
  font-size: 1.05rem;
}

.site-brand svg {
  flex-shrink: 0;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav-links a {
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.site-nav-links a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.site-nav-links a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-confirmed);
  background: var(--color-confirmed-bg);
  padding: 0.2rem 0.55rem;
  border-radius: 9999px;
  border: 1px solid var(--color-confirmed-border);
}

/* ─── Footer Extensions ──────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 1rem 2rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: left;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.footer-col h3 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #1e3a5f;
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ─── Guide Articles ─────────────────────────────────────────────────────────── */
.guide-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.guide-article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.5rem 2.25rem;
  box-shadow: var(--shadow-sm);
  color: var(--color-text);
  line-height: 1.7;
}

@media (max-width: 640px) {
  .guide-article {
    padding: 1.5rem 1rem;
  }
}

.guide-header {
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
}

.guide-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.75rem;
}

.guide-title {
  font-size: 1.85rem;
  color: #1e3a5f;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.guide-lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.guide-article h2 {
  font-size: 1.35rem;
  color: #1e3a5f;
  margin: 2rem 0 0.85rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--color-border);
}

.guide-article h3 {
  font-size: 1.1rem;
  color: #1e3a5f;
  margin: 1.5rem 0 0.5rem;
}

.guide-article p {
  margin-bottom: 1.1rem;
}

.guide-article ul, .guide-article ol {
  margin: 0.5rem 0 1.25rem 1.5rem;
}

.guide-article li {
  margin-bottom: 0.4rem;
}

.guide-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.75rem;
  font-size: 0.9rem;
}

.guide-table th, .guide-table td {
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.guide-table th {
  background: #f1f5f9;
  font-weight: 600;
  color: #1e3a5f;
}

.code-invalid {
  background: var(--color-error-bg);
  color: var(--color-error);
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.code-valid {
  background: var(--color-success-bg);
  color: var(--color-confirmed);
  padding: 0.15rem 0.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.callout {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-left: 4px solid;
}

.callout-info {
  background: #f0f7ff;
  border-color: var(--color-primary);
  color: #1e3a5f;
}

.callout-warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-likely);
}

.callout-tool {
  background: #ecfdf5;
  border-color: var(--color-success);
  color: #064e3b;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.callout-tool h3 {
  margin: 0;
  color: #064e3b;
}

.guide-cta-box {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin: 2.5rem 0;
  text-align: center;
}

.guide-cta-box h3 {
  font-size: 1.25rem;
  color: #1e3a5f;
  margin-bottom: 0.5rem;
}

.guide-cta-box p {
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto 1.25rem;
  font-size: 0.95rem;
}

.related-guides {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--color-border);
}

.related-guides h3 {
  font-size: 1.15rem;
  color: #1e3a5f;
  margin-bottom: 1rem;
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.guide-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.guide-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.guide-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: #1e3a5f;
  margin-bottom: 0.4rem;
}

.guide-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 0.8rem;
}

.guide-card-meta {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── Feedback UI ────────────────────────────────────────────────────────────── */
.feedback-container {
  max-width: 680px;
  margin: 0 auto;
  padding: 2.5rem 1rem 4rem;
}

.feedback-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.feedback-privacy-alert {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: 0.85rem;
  color: var(--color-likely);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.feedback-field {
  margin-bottom: 1.25rem;
}

.feedback-field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #1e3a5f;
  margin-bottom: 0.4rem;
}

.feedback-select,
.feedback-textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.feedback-select:focus,
.feedback-textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.feedback-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.feedback-toast {
  display: inline-block;
  padding: 0.4rem 0.8rem;
  background: var(--color-success-bg);
  color: var(--color-confirmed);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-confirmed-border);
}

/* ─── Homepage Enhancements ─────────────────────────────────────────────────── */
.home-container {
  width: 100%;
}

.home-intro-banner {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 2.75rem 1rem 2rem;
  text-align: center;
}

.home-intro-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.home-badge-row {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: #1e3a5f;
  background: #e2e8f0;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
}

.home-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #1e3a5f;
  line-height: 1.2;
  margin-bottom: 0.85rem;
  letter-spacing: -0.02em;
}

@media (max-width: 640px) {
  .home-title { font-size: 1.7rem; }
}

.home-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 65ch;
  margin: 0 auto 1.5rem;
  line-height: 1.55;
}

.home-cta-row {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.home-resources-section {
  max-width: var(--max-width);
  margin: 4rem auto 2rem;
  padding: 0 1rem;
}

.section-header-center {
  text-align: center;
  margin-bottom: 2.25rem;
}

.section-header-center h2 {
  font-size: 1.6rem;
  color: #1e3a5f;
  margin-bottom: 0.5rem;
}

.section-header-center p {
  color: var(--color-text-muted);
  max-width: 58ch;
  margin: 0 auto;
  font-size: 0.95rem;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 768px) {
  .workflow-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

.workflow-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.workflow-step-num {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.workflow-card h3 {
  font-size: 1.05rem;
  color: #1e3a5f;
}

.workflow-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}