:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d1117;
  --bg-card: rgba(18, 24, 38, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.25);
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --accent-cyan: #00f0ff;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 240, 255, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(16, 185, 129, 0.04) 0%, transparent 40%);
}

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.shield-icon {
  font-size: 36px;
  filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.4));
}

.logo-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-subtitle {
  font-size: 13px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.speed-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.github-btn {
  text-decoration: none;
  background: #238636;
  color: #ffffff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: background 0.2s;
}

.github-btn:hover {
  background: #2ea043;
}

/* Main Grid */
.playground-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  flex: 1;
}

@media (max-width: 1024px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
}

/* Editor Panel */
.editor-panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 12px;
}

.lang-tabs {
  display: flex;
  gap: 6px;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

.tab-btn.active {
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.12);
  font-weight: 600;
}

.editor-controls {
  display: flex;
  gap: 10px;
}

.secondary-btn, .primary-btn {
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.primary-btn {
  background: var(--accent-cyan);
  color: #050811;
}

.primary-btn:hover {
  filter: brightness(1.15);
}

.primary-btn.glow {
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.35);
}

.code-area-wrapper {
  flex: 1;
  display: flex;
  min-height: 480px;
}

#codeEditor {
  width: 100%;
  height: 100%;
  background: transparent;
  color: #e6edf3;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  padding: 18px;
  border: none;
  resize: none;
  outline: none;
  tab-size: 4;
}

/* Telemetry Panel */
.telemetry-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.score-card, .ledger-card, .badge-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.score-card {
  display: flex;
  align-items: center;
  gap: 24px;
}

.gauge-wrapper {
  position: relative;
  width: 100px;
  height: 100px;
  flex-shrink: 0;
}

.score-gauge {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.gauge-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 10;
}

.gauge-fill {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 10;
  stroke-dasharray: 314;
  stroke-dashoffset: 0;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.6s ease, stroke 0.4s ease;
}

.gauge-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.score-number {
  font-size: 24px;
  font-weight: 700;
}

.score-denom {
  font-size: 10px;
  color: var(--text-muted);
}

.score-meta h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.status-clean { color: var(--accent-cyan); }
.status-warn { color: var(--accent-yellow); }
.status-danger { color: var(--accent-red); }

.score-meta p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.audit-stats {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

.audit-stats strong {
  color: var(--text-main);
}

/* Ledger */
.ledger-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.ledger-header h3 {
  font-size: 15px;
  font-weight: 600;
}

.badge-pill {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.badge-pill.clean {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.badge-pill.danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--accent-red);
}

.defect-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 280px;
  overflow-y: auto;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 0;
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
}

.empty-state .sparkle {
  font-size: 28px;
  margin-bottom: 6px;
}

.defect-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-red);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.defect-top {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
}

.defect-rule {
  font-weight: 600;
  color: var(--accent-red);
}

.defect-line {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.defect-msg {
  font-size: 13px;
  color: var(--text-main);
}

/* Badge card */
.badge-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.badge-card p {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.badge-preview {
  margin-bottom: 12px;
}

.badge-copy-row {
  display: flex;
  gap: 8px;
}

.badge-copy-row input {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  cursor: pointer;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* Footer */
.app-footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  padding-top: 16px;
}