/* PromptPulse Studio — Bespoke Dark Slate & Obsidian Theme */
:root {
  --bg-base: #0B0F19;
  --bg-surface: #111827;
  --bg-card: #151D2F;
  --bg-elevated: #1F293D;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  
  --text-main: #F9FAFB;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;

  --accent-primary: #4F46E5;
  --accent-primary-hover: #4338CA;
  --accent-primary-glow: rgba(79, 70, 229, 0.25);

  --emerald: #10B981;
  --emerald-bg: rgba(16, 185, 129, 0.12);
  --emerald-border: rgba(16, 185, 129, 0.3);

  --amber: #F59E0B;
  --amber-bg: rgba(245, 158, 11, 0.12);
  --amber-border: rgba(245, 158, 11, 0.3);

  --crimson: #EF4444;
  --crimson-bg: rgba(239, 68, 68, 0.12);
  --crimson-border: rgba(239, 68, 68, 0.3);

  --indigo: #6366F1;
  --indigo-bg: rgba(99, 102, 241, 0.12);
  --indigo-border: rgba(99, 102, 241, 0.3);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background-color: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #FFFFFF;
}

.version-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.brand-tagline {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.header-telemetry {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--emerald-bg);
  border: 1px solid var(--emerald-border);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--emerald);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.status-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--emerald);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-icon {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px var(--accent-primary-glow);
}

.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-elevated);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--border-subtle);
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

.btn-ghost-subtle {
  background-color: transparent;
  border-color: transparent;
  color: var(--text-dim);
  padding: 0.5rem;
}

.btn-ghost-subtle:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

/* Main Container */
.main-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  flex: 1;
}

/* Overview Scorecard Grid */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.stat-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.15);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-subtext {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.text-emerald { color: var(--emerald); }
.text-amber { color: var(--amber); }
.text-crimson { color: var(--crimson); }
.text-indigo { color: var(--indigo); }
.mono { font-family: var(--font-mono); }

/* Sections */
.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}

.section-subheading {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* Economics Section */
.volume-control {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.volume-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-select {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  cursor: pointer;
  outline: none;
}

.form-select:focus {
  border-color: var(--accent-primary);
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.model-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
}

.model-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.model-name {
  font-weight: 700;
  font-size: 0.9375rem;
  color: #FFFFFF;
}

.delta-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.delta-tag.savings {
  background-color: var(--emerald-bg);
  color: var(--emerald);
  border: 1px solid var(--emerald-border);
}

.delta-tag.inflation {
  background-color: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}

.model-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  background-color: rgba(0, 0, 0, 0.2);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}

.number-col-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.number-col-val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 0.15rem;
}

.net-savings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.625rem;
}

/* Prompt Comparison Workbench */
.diff-telemetry-badge {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.prompt-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.prompt-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.prompt-card.candidate-card {
  border-color: rgba(99, 102, 241, 0.3);
}

.prompt-card-header {
  padding: 0.875rem 1.25rem;
  background-color: rgba(0, 0, 0, 0.25);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.prompt-tag-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.prompt-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-neutral {
  background-color: var(--bg-elevated);
  color: var(--text-muted);
}

.badge-primary {
  background-color: var(--accent-primary);
  color: #FFFFFF;
}

.prompt-metrics {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.metric-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.06);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.textarea-wrapper {
  position: relative;
  padding: 1rem 1.25rem;
  flex: 1;
}

.code-textarea {
  width: 100%;
  height: 240px;
  background-color: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
}

.variable-chip-row {
  padding: 0.75rem 1.25rem;
  background-color: rgba(0, 0, 0, 0.15);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}

.var-chip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  background-color: var(--indigo-bg);
  border: 1px solid var(--indigo-border);
  color: #A5B4FC;
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
}

/* Test Suite Section */
.filter-controls {
  display: flex;
  gap: 0.5rem;
}

.filter-btn {
  background-color: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.filter-btn.active {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #FFFFFF;
}

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

.test-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.test-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.test-card-header {
  padding: 1rem 1.25rem;
  background-color: rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.test-meta {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.verdict-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
}

.verdict-badge.PASS {
  background-color: var(--emerald-bg);
  border: 1px solid var(--emerald-border);
  color: var(--emerald);
}

.verdict-badge.REGRESSION {
  background-color: var(--crimson-bg);
  border: 1px solid var(--crimson-border);
  color: var(--crimson);
}

.verdict-badge.WARNING {
  background-color: var(--amber-bg);
  border: 1px solid var(--amber-border);
  color: var(--amber);
}

.verdict-badge.IMPROVEMENT {
  background-color: var(--indigo-bg);
  border: 1px solid var(--indigo-border);
  color: var(--indigo);
}

.test-title-group h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
}

.test-title-group p {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.test-telemetry {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.score-badge {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.test-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.variables-display {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  background-color: rgba(0, 0, 0, 0.2);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
}

.var-display-tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.var-display-tag strong {
  color: #A5B4FC;
}

.output-comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.output-box {
  background-color: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.875rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-main);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 180px;
  overflow-y: auto;
}

.output-box-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-backdrop.open {
  display: flex;
}

.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 620px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-main);
}

.modal-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 70vh;
  overflow-y: auto;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-textarea {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  outline: none;
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-primary);
}

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

.modal-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background-color: rgba(0, 0, 0, 0.2);
}

/* Footer */
.app-footer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  padding: 1.25rem 0;
  margin-top: auto;
}

.footer-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.separator {
  margin: 0 0.5rem;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .overview-grid, .models-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .prompt-split-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .overview-grid, .models-grid {
    grid-template-columns: 1fr;
  }
  .header-container, .footer-container {
    flex-direction: column;
    align-items: flex-start;
  }
}