:root {
  --bg-color: #0d1117;
  --panel-bg: #161b22;
  --border-color: #30363d;
  --text-color: #c9d1d9;
  --text-muted: #8b949e;
  --primary: #58a6ff;
  --accent: #ff7b72;
  --green: #7ee787;
  --green-bg: rgba(126, 231, 135, 0.12);
  --green-border: rgba(126, 231, 135, 0.35);
  --yellow: #d2a8ff;
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

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

html, body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
}

header {
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

header h1 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

header p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Dual Split Viewer Container (Top Panel) */
.viewer-container {
  background-color: #090d13;
  border-bottom: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  height: 230px;
  min-height: 230px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.viewer-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.viewer-title {
  font-weight: 600;
  color: var(--primary);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.viewer-badge {
  background: rgba(88, 166, 255, 0.15);
  color: var(--primary);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
}

.result-status-badge {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}

.code-display, .result-display {
  flex: 1;
  background-color: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  color: var(--text-color);
  overflow-y: auto;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.45;
  -webkit-overflow-scrolling: touch;
}

.result-display {
  background-color: rgba(13, 17, 23, 0.7);
  border-color: rgba(88, 166, 255, 0.25);
  color: #7ee787;
}

.code-placeholder {
  color: var(--text-muted);
  font-style: italic;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
}

main {
  flex: 1;
  display: flex;
  min-height: 500px;
}

.column {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  min-width: 320px;
}

.column:last-child {
  border-right: none;
}

.column-header {
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 0.65rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
  position: sticky;
  top: 230px;
  z-index: 90;
}

.column-header span.badge {
  background: rgba(88, 166, 255, 0.15);
  color: var(--primary);
  padding: 0.18rem 0.45rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
}

.console-list {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* CRITICAL FIX: flex-shrink: 0 prevents flex items from compressing/squishing into tiny overlapped slivers */
.console-item {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  transition: all 0.2s ease-in-out;
  flex-shrink: 0;
  min-height: 54px;
}

.console-item:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.console-item.active {
  border-color: var(--primary);
  background-color: rgba(88, 166, 255, 0.08);
  box-shadow: 0 0 0 1px var(--primary);
}

.item-summary {
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #e6edf3;
}

.item-label {
  color: var(--yellow);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-weight: 500;
}

.item-input-field {
  background: #0d1117;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--primary);
  padding: 0.15rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  width: 110px;
  outline: none;
  transition: border-color 0.2s;
}

.item-input-field:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

/* Enhanced Output Badge Styling */
.item-output-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  border-radius: 5px;
  padding: 0.2rem 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  flex-shrink: 0;
}

.item-output-prefix {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 600;
}

.item-output {
  color: var(--green);
  font-weight: 700;
  font-size: 0.83rem;
  word-break: break-all;
}

.hint-click {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-left: 0.35rem;
  opacity: 0.75;
}

/* Enhanced Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(13, 17, 23, 0.5);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
  border: 2px solid var(--bg-color);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Responsive adjustments for narrower screens */
@media (max-width: 900px) {
  .viewer-container {
    grid-template-columns: 1fr;
    height: auto;
    min-height: auto;
    position: relative;
    top: 0;
  }
  .column-header {
    position: relative;
    top: 0;
  }
  main {
    flex-direction: column;
  }
  .column {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
}