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

:root {
  --color-primary: #1a237e;
  --color-primary-light: #534bae;
  --color-accent: #c62828;
  --color-success: #2e7d32;
  --color-warning: #f57f17;
  --color-error: #d32f2f;
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #212121;
  --color-text-secondary: #616161;
  --color-border: #e0e0e0;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* === Header === */
.header {
  background: var(--color-primary);
  color: #fff;
  padding: 1.5rem 2rem;
  text-align: center;
}

.header h1 {
  font-size: 1.75rem;
  font-weight: 700;
}

.header .subtitle {
  font-size: 0.95rem;
  opacity: 0.85;
  margin-top: 0.25rem;
}

/* === Container === */
.container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* === Section === */
.section {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.section h2 {
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

/* === Form Styles === */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

.required {
  color: var(--color-error);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
}

.form-group input.invalid,
.form-group textarea.invalid,
.form-group select.invalid {
  border-color: var(--color-error);
}

.form-group select[multiple] {
  min-height: 120px;
}

.error-message {
  display: block;
  color: var(--color-error);
  font-size: 0.8rem;
  margin-top: 0.3rem;
  min-height: 1.1em;
}

.hint {
  display: block;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  margin-top: 0.3rem;
}

/* === Buttons === */
.form-actions {
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

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

.btn-secondary {
  background: var(--color-text-secondary);
  color: #fff;
}

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

/* === Loading Indicator === */
.loading {
  text-align: center;
  padding: 1.5rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 0.75rem;
}

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

.loading p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* === Error Banner === */
.error-banner {
  background: #ffebee;
  border: 1px solid var(--color-error);
  border-radius: var(--radius);
  padding: 1rem;
  margin-top: 1rem;
  color: var(--color-error);
  font-size: 0.9rem;
}

/* === Progress Indicator === */
.progress-indicator {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 100px;
  position: relative;
}

.stage-info {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stage-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  position: relative;
}

.stage.pending .stage-icon {
  background: var(--color-border);
  color: var(--color-text-secondary);
}

.stage.in-progress .stage-icon {
  background: var(--color-warning);
  color: #fff;
  animation: pulse 1.5s ease-in-out infinite;
  box-shadow: 0 0 12px rgba(245, 127, 23, 0.4);
}

.stage.completed .stage-icon {
  background: var(--color-success);
  color: #fff;
  transform: scale(1);
}

.stage.error .stage-icon {
  background: var(--color-error);
  color: #fff;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 8px rgba(245, 127, 23, 0.3); }
  50% { transform: scale(1.1); box-shadow: 0 0 16px rgba(245, 127, 23, 0.6); }
}

/* Stage icon inner elements */
.icon-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.icon-check {
  font-size: 1.3rem;
  line-height: 1;
}

.icon-error {
  font-size: 1.3rem;
  line-height: 1;
}

.stage-label {
  font-size: 0.75rem;
  margin-top: 0.4rem;
  color: var(--color-text-secondary);
  max-width: 110px;
  font-weight: 500;
}

.stage.in-progress .stage-label,
.stage.completed .stage-label {
  color: var(--color-text);
  font-weight: 600;
}

.stage-status {
  font-size: 0.7rem;
  margin-top: 0.2rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

.stage.in-progress .stage-status {
  color: var(--color-warning);
}

.stage.completed .stage-status {
  color: var(--color-success);
}

.stage.error .stage-status {
  color: var(--color-error);
}

.stage-elapsed {
  font-size: 0.7rem;
  margin-top: 0.15rem;
  color: var(--color-text-secondary);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

.stage.in-progress .stage-elapsed {
  color: var(--color-warning);
  font-weight: 600;
}

.stage-meta {
  font-size: 0.65rem;
  margin-top: 0.2rem;
  color: var(--color-text-secondary);
  max-width: 110px;
  word-break: break-all;
}

.meta-model {
  background: #e8eaf6;
  border-radius: 3px;
  padding: 0.1rem 0.3rem;
  font-size: 0.6rem;
}

.meta-latency {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
  font-size: 0.6rem;
}

.stage-connector {
  width: 24px;
  height: 2px;
  background: var(--color-border);
  margin-top: 20px;
  transition: background var(--transition);
}

/* === Stage Output Feed === */
.stage-output {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 1rem;
  font-size: 0.85rem;
  max-height: 300px;
  overflow-y: auto;
  min-height: 60px;
}

.stage-output:empty::before {
  content: 'Waiting for pipeline output...';
  color: var(--color-text-secondary);
  font-style: italic;
  font-size: 0.8rem;
}

.output-entry {
  margin-bottom: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 6px;
  border-left: 3px solid var(--color-border);
  background: var(--color-surface);
}

.output-entry:last-child {
  margin-bottom: 0;
}

.output-entry-success {
  border-left-color: var(--color-success);
}

.output-entry-error {
  border-left-color: var(--color-error);
  background: #fff5f5;
}

.output-entry-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.3rem;
  font-size: 0.8rem;
}

.output-entry-header .output-entry-icon {
  font-size: 0.85rem;
}

.output-entry-success .output-entry-icon {
  color: var(--color-success);
}

.output-entry-error .output-entry-icon {
  color: var(--color-error);
}

.output-entry-body {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.stage-output p {
  margin-bottom: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-border);
}

.stage-output p:last-child {
  border-bottom: none;
}

/* === Report Styles === */
.report {
  line-height: 1.7;
}

.report-section {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.report-section:last-child {
  border-bottom: none;
}

.report-section h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.report-section p,
.report-section ul {
  font-size: 0.9rem;
  color: var(--color-text);
}

.report-section ul {
  padding-left: 1.25rem;
}

.report-section li {
  margin-bottom: 0.3rem;
}

.report-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.report-table th,
.report-table td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.report-table th {
  background: var(--color-bg);
  font-weight: 600;
}

.status-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.in-stock {
  background: #e8f5e9;
  color: var(--color-success);
}

.status-badge.backordered {
  background: #fff3e0;
  color: var(--color-warning);
}

.status-badge.discontinued {
  background: #ffebee;
  color: var(--color-error);
}

.status-badge.not-found {
  background: #eceff1;
  color: var(--color-text-secondary);
}

.status-badge.severity-low {
  background: #e8f5e9;
  color: var(--color-success);
}

.status-badge.severity-medium {
  background: #fff3e0;
  color: var(--color-warning);
}

.status-badge.severity-high {
  background: #ffebee;
  color: var(--color-error);
}

.status-badge.severity-critical {
  background: #d32f2f;
  color: #fff;
}

/* === TSB Entries === */
.tsb-entry {
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: var(--color-bg);
  border-radius: 6px;
  border-left: 3px solid var(--color-primary-light);
}

.tsb-entry:last-child {
  margin-bottom: 0;
}

.tsb-entry h4 {
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  color: var(--color-primary);
}

.tsb-number {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.3rem;
}

.tsb-excerpt {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.5;
}

.tsb-score {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 0.3rem;
}

/* === Report Placeholders === */
.report-section .placeholder {
  font-style: italic;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* === Text Helpers === */
.text-muted {
  color: var(--color-text-secondary);
  font-style: italic;
}

/* === Reconnection Notice === */
.reconnection-notice {
  background: #fff3e0;
  border: 1px solid var(--color-warning);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  color: #e65100;
  font-size: 0.85rem;
  text-align: center;
}

/* === Utility === */
.hidden {
  display: none !important;
}

/* === Responsive === */
@media (max-width: 600px) {
  .header {
    padding: 1rem;
  }

  .header h1 {
    font-size: 1.35rem;
  }

  .container {
    margin: 1rem auto;
  }

  .section {
    padding: 1.25rem;
  }

  .progress-indicator {
    flex-direction: column;
    gap: 0.5rem;
    align-items: stretch;
  }

  .stage-connector {
    width: 2px;
    height: 16px;
    margin: 0 auto;
  }

  .stage {
    flex-direction: row;
    gap: 0.75rem;
    min-width: unset;
    width: 100%;
    text-align: left;
  }

  .stage-info {
    align-items: flex-start;
  }

  .stage-label {
    max-width: unset;
    margin-top: 0;
    text-align: left;
  }

  .stage-meta {
    max-width: unset;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}


/* === Results Tabs === */
.results-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1.5rem;
  gap: 0;
}

.results-tab {
  padding: 0.65rem 1.25rem;
  border: none;
  background: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition), border-color var(--transition);
}

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

.results-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.results-tab-content {
  display: block;
}

.results-tab-content.hidden {
  display: none !important;
}

/* === Observability Dashboard === */
.observability-dashboard {
  font-size: 0.9rem;
}

.obs-empty {
  text-align: center;
  padding: 2rem;
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Summary metrics row */
.obs-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.obs-metric {
  flex: 1;
  min-width: 120px;
  text-align: center;
  padding: 0.5rem;
}

.obs-metric-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

.obs-metric-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Section titles */
.obs-section {
  margin-bottom: 1.5rem;
}

.obs-section-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

/* Timeline table */
.obs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.obs-table th,
.obs-table td {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.obs-table th {
  background: var(--color-bg);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
}

.obs-table .obs-total-row {
  background: var(--color-bg);
}

.obs-stage-name {
  font-weight: 500;
}

.obs-mono {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
  font-size: 0.8rem;
}

/* Model badge */
.obs-model-badge {
  display: inline-block;
  background: #e8eaf6;
  color: var(--color-primary);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
  font-size: 0.72rem;
  font-weight: 600;
}

.obs-model-badge-lg {
  font-size: 0.82rem;
  padding: 0.25rem 0.6rem;
}

/* Model selection grid */
.obs-model-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.obs-model-card {
  flex: 1;
  min-width: 180px;
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 0.75rem;
}

.obs-model-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.obs-model-count {
  font-size: 0.72rem;
  color: var(--color-text-secondary);
}

.obs-model-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.obs-model-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 3px;
  transition: width 0.4s ease;
}

.obs-model-stages {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

/* Latency breakdown bars */
.obs-latency-bars {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.obs-latency-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.obs-latency-label {
  width: 80px;
  font-size: 0.78rem;
  font-weight: 500;
  text-align: right;
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.obs-latency-bar-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.obs-latency-bar-bg {
  flex: 1;
  height: 10px;
  background: var(--color-border);
  border-radius: 5px;
  overflow: hidden;
}

.obs-latency-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: 5px;
  transition: width 0.4s ease;
}

.obs-latency-value {
  font-size: 0.72rem;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
  color: var(--color-text-secondary);
  min-width: 55px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .obs-summary {
    flex-direction: column;
    gap: 0.75rem;
  }

  .obs-metric {
    min-width: unset;
  }

  .obs-model-grid {
    flex-direction: column;
  }

  .obs-model-card {
    min-width: unset;
  }

  .obs-table {
    font-size: 0.75rem;
  }

  .obs-table th,
  .obs-table td {
    padding: 0.35rem 0.4rem;
  }

  .results-tabs {
    overflow-x: auto;
  }

  .obs-latency-label {
    width: 60px;
    font-size: 0.7rem;
  }
}