:root {
  --bg-page: hsl(210, 20%, 98%);
  --bg-surface: hsl(0, 0%, 100%);
  --bg-subtle: hsl(210, 18%, 95%);
  --bg-canvas: hsl(215, 28%, 10%);
  --border-color: hsl(214, 18%, 86%);
  --border-strong: hsl(215, 16%, 74%);

  --text-primary: hsl(215, 28%, 12%);
  --text-secondary: hsl(215, 16%, 38%);
  --text-muted: hsl(215, 14%, 52%);

  --accent-primary: hsl(212, 92%, 42%);
  --accent-primary-hover: hsl(212, 92%, 35%);
  --accent-primary-soft: hsl(212, 90%, 95%);

  --status-pass-bg: hsl(145, 65%, 94%);
  --status-pass-border: hsl(145, 60%, 38%);
  --status-pass-text: hsl(145, 75%, 22%);

  --status-warn-bg: hsl(38, 92%, 94%);
  --status-warn-border: hsl(35, 88%, 44%);
  --status-warn-text: hsl(32, 85%, 26%);

  --status-fail-bg: hsl(355, 85%, 95%);
  --status-fail-border: hsl(355, 78%, 48%);
  --status-fail-text: hsl(355, 80%, 28%);

  --status-idle-bg: hsl(210, 18%, 94%);
  --status-idle-border: hsl(214, 15%, 72%);
  --status-idle-text: hsl(215, 18%, 32%);

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: hsl(216, 28%, 8%);
    --bg-surface: hsl(216, 24%, 12%);
    --bg-subtle: hsl(216, 22%, 16%);
    --bg-canvas: hsl(218, 32%, 7%);
    --border-color: hsl(216, 18%, 22%);
    --border-strong: hsl(215, 16%, 32%);

    --text-primary: hsl(210, 25%, 96%);
    --text-secondary: hsl(214, 15%, 72%);
    --text-muted: hsl(215, 12%, 54%);

    --accent-primary: hsl(210, 95%, 58%);
    --accent-primary-hover: hsl(210, 95%, 65%);
    --accent-primary-soft: hsl(212, 55%, 18%);

    --status-pass-bg: hsl(145, 45%, 14%);
    --status-pass-border: hsl(145, 62%, 45%);
    --status-pass-text: hsl(145, 70%, 78%);

    --status-warn-bg: hsl(36, 50%, 15%);
    --status-warn-border: hsl(38, 88%, 52%);
    --status-warn-text: hsl(38, 90%, 80%);

    --status-fail-bg: hsl(355, 48%, 16%);
    --status-fail-border: hsl(355, 78%, 58%);
    --status-fail-text: hsl(355, 85%, 84%);

    --status-idle-bg: hsl(216, 20%, 16%);
    --status-idle-border: hsl(215, 16%, 30%);
    --status-idle-text: hsl(214, 16%, 76%);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 3rem;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem;
}

/* Header */
.app-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1.1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-title-row h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.brand-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
  white-space: nowrap;
}

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

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

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

.btn-primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  font-size: 0.95rem;
  padding: 0.65rem 1.35rem;
  box-shadow: var(--shadow-sm);
}

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

.btn-danger {
  background: var(--status-fail-bg);
  border-color: var(--status-fail-border);
  color: var(--status-fail-text);
}

/* Primary Control & Config Bar */
.control-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.primary-cta-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.progress-pill {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.9rem;
}

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

.field-group label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.field-group select,
.field-group input[type="number"] {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 0.48rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-page);
  color: var(--text-primary);
  width: 100%;
}

.field-group select:focus,
.field-group input[type="number"]:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 1px;
}

.toggles-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 0.95rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--border-color);
}

.profile-desc {
  margin: 0.6rem 0 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.advanced-settings {
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

.advanced-settings > summary {
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.2rem;
  user-select: none;
}

.advanced-settings[open] > summary {
  margin-bottom: 0.85rem;
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.84rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-primary);
}

/* Verdict Banner */
.verdict-banner {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--status-idle-border);
  background: var(--status-idle-bg);
  color: var(--status-idle-text);
  margin-bottom: 1.25rem;
  transition: all 0.2s ease;
}

.verdict-banner.pass {
  background: var(--status-pass-bg);
  border-color: var(--status-pass-border);
  color: var(--status-pass-text);
}

.verdict-banner.warn {
  background: var(--status-warn-bg);
  border-color: var(--status-warn-border);
  color: var(--status-warn-text);
}

.verdict-banner.fail {
  background: var(--status-fail-bg);
  border-color: var(--status-fail-border);
  color: var(--status-fail-text);
}

.verdict-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.verdict-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.verdict-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.08);
}

.verdict-headline {
  font-size: 1.05rem;
  font-weight: 700;
}

.verdict-diagnostics {
  font-size: 0.875rem;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.verdict-diagnostics li::before {
  content: "• ";
  font-weight: bold;
}

/* KPI Summary Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.4rem;
}

.kpi-label {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.kpi-unit {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.kpi-subtext {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Pipeline Decomposition Bar */
.decomposition-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.stack-bar-track {
  height: 24px;
  width: 100%;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  border: 1px solid var(--border-color);
  margin-bottom: 0.65rem;
}

.stack-seg {
  height: 100%;
  transition: width 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
  white-space: nowrap;
}

.seg-base {
  background: hsl(212, 85%, 48%);
}

.seg-output {
  background: hsl(188, 78%, 38%);
}

.seg-os {
  background: hsl(28, 88%, 48%);
}

.stack-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
}

.legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

/* Oscilloscope & Cross-Correlation Canvases */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(440px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 600px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.1rem;
  box-shadow: var(--shadow-sm);
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 190px;
  background: var(--bg-canvas);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.canvas-wrapper canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Trial Results Table & Environment Metadata */
.bottom-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
}

@media (max-width: 900px) {
  .bottom-grid {
    grid-template-columns: 1fr;
  }
}

.table-card,
.env-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

th,
td {
  padding: 0.55rem 0.65rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  font-family: var(--font-sans);
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--bg-subtle);
}

.pill-pass {
  color: var(--status-pass-text);
  background: var(--status-pass-bg);
  border: 1px solid var(--status-pass-border);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.pill-warn {
  color: var(--status-warn-text);
  background: var(--status-warn-bg);
  border: 1px solid var(--status-warn-border);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.pill-fail {
  color: var(--status-fail-text);
  background: var(--status-fail-bg);
  border: 1px solid var(--status-fail-border);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  font-weight: 600;
}

.env-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.82rem;
}

.env-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px dashed var(--border-color);
}

.env-key {
  color: var(--text-secondary);
}

.env-val {
  font-family: var(--font-mono);
  font-weight: 600;
  text-align: right;
  word-break: break-all;
}

.decomp-note {
  margin: 0.6rem 0 0;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.side-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.table-empty {
  color: var(--text-muted);
  text-align: center;
  padding: 1.25rem;
}