:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-editor: #0f0f23;
  --bg-panel: #1e1e3a;
  --bg-toolbar: #252547;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b8;
  --text-muted: #6e6e8a;
  --accent: #4fc3f7;
  --accent-hover: #29b6f6;
  --error: #ef5350;
  --error-bg: rgba(239, 83, 80, 0.1);
  --success: #66bb6a;
  --border: #2a2a4a;
  --divider: #3a3a5a;
  --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.toolbar h1 {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.toolbar label {
  font-size: 13px;
  color: var(--text-secondary);
}

.toolbar select {
  background: var(--bg-editor);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 13px;
  font-family: var(--font-sans);
  cursor: pointer;
}

.toolbar select:focus {
  outline: none;
  border-color: var(--accent);
}

.tab-group {
  display: flex;
  gap: 2px;
  background: var(--bg-editor);
  border-radius: 6px;
  padding: 2px;
}

.tab-btn {
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 4px 12px;
  font-size: 13px;
  font-family: var(--font-sans);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-panel);
}

.tab-btn.active {
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 500;
}

/* Main layout */
.main {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* Panels */
.panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.panel-left {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.panel-right {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.panel-header {
  display: flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.panel-header .badge {
  margin-left: auto;
  background: var(--bg-editor);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
}

.editor-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.editor-container textarea {
  width: 100%;
  height: 100%;
  background: var(--bg-editor);
  color: var(--text-primary);
  border: none;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  resize: none;
  outline: none;
  tab-size: 2;
}

.editor-container textarea::placeholder {
  color: var(--text-muted);
}

/* Dividers */
.divider-h {
  width: 4px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.15s;
}

.divider-h:hover, .divider-h.active {
  background: var(--accent);
}

.divider-v {
  height: 4px;
  background: var(--border);
  cursor: row-resize;
  flex-shrink: 0;
  transition: background 0.15s;
}

.divider-v:hover, .divider-v.active {
  background: var(--accent);
}

/* Output panel */
.output-container {
  flex: 1;
  overflow: auto;
  padding: 12px;
  background: var(--bg-editor);
}

.output-json {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
}

.output-error {
  background: var(--error-bg);
  border: 1px solid var(--error);
  border-radius: 6px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--error);
}

.output-error .error-location {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 8px;
}

.output-placeholder {
  color: var(--text-muted);
  font-style: italic;
  font-size: 14px;
}

/* Variables panel */
.variables-panel {
  flex: 0 0 180px;
  display: flex;
  flex-direction: column;
}

/* Used variables hint */
.used-vars {
  padding: 6px 12px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.used-vars span {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* Syntax highlighting for JSON output */
.json-key { color: #82aaff; }
.json-string { color: #c3e88d; }
.json-number { color: #f78c6c; }
.json-bool { color: #c792ea; }
.json-null { color: #89ddff; }

/* ===== Variant Cards ===== */
.variants-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.variants-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.variant-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  transition: border-color 0.15s;
}

.variant-card:hover {
  border-color: var(--accent);
}

.variant-card-skipped {
  opacity: 0.5;
}

.variant-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.variant-pkg-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

.variant-pkg-version {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.variant-build-string {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-editor);
  padding: 1px 6px;
  border-radius: 3px;
}

.variant-badge {
  font-size: 11px;
  padding: 1px 8px;
  border-radius: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.variant-badge-skip {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid var(--error);
}

.variant-badge-noarch {
  background: rgba(102, 187, 106, 0.1);
  color: var(--success);
  border: 1px solid var(--success);
}

.variant-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.variant-key-pill {
  display: inline-flex;
  border-radius: 4px;
  overflow: hidden;
  font-size: 12px;
  font-family: var(--font-mono);
  border: 1px solid var(--border);
}

.variant-key-name {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 1px 6px;
}

.variant-key-value {
  background: var(--bg-editor);
  color: var(--accent);
  padding: 1px 6px;
}

.variant-deps {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
  font-size: 12px;
}

.variant-dep-section {
  margin-bottom: 3px;
  line-height: 1.6;
}

.variant-dep-label {
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 4px;
}

.variant-dep {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--bg-editor);
  padding: 1px 5px;
  border-radius: 3px;
  margin-right: 2px;
}

/* Collapsible JSON details */
.variants-json-details {
  margin-top: 8px;
}

.variants-json-details summary {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 12px;
  padding: 6px 0;
  user-select: none;
}

.variants-json-details summary:hover {
  color: var(--text-secondary);
}

.variants-json-details[open] summary {
  margin-bottom: 8px;
}

/* Responsive */
@media (max-width: 768px) {
  .main {
    flex-direction: column;
  }
  .divider-h {
    width: 100%;
    height: 4px;
    cursor: row-resize;
  }
}