/* ============================================
   PLAYGROUND — Ace Editor Integration
   ============================================ */

/* Layout */
.pg-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  height: calc(100vh - var(--nav-height));
  margin-top: var(--nav-height);
  position: relative;
  z-index: 1;
}

/* Sidebar */
.pg-sidebar {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: rgba(5, 7, 20, 0.5);
}
.pgs-header {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--border);
}
.pgs-header h3 { font-size: 0.92rem; font-weight: 700; }
.pgs-templates {
  flex: 1;
  overflow-y: auto;
  padding: 8px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.template-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}
.template-item:hover { background: var(--bg-card); border-color: var(--border); }
.template-item.active { background: rgba(167,139,250,0.1); border-color: rgba(167,139,250,0.25); }
.ti-icon { font-size: 1.15rem; flex-shrink: 0; }
.ti-info { display: flex; flex-direction: column; gap: 1px; }
.ti-name { font-size: 0.82rem; font-weight: 600; color: var(--text-primary); }
.ti-tag { font-size: 0.68rem; color: var(--text-muted); }

/* Sidebar divider & free code */
.pgs-divider {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  padding: 6px 16px;
  letter-spacing: 0.08em;
  user-select: none;
}
.free-code-item {
  border: 1px dashed rgba(52,211,153,0.2) !important;
  background: rgba(52,211,153,0.03) !important;
  margin: 0 8px 8px;
}
.free-code-item:hover { background: rgba(52,211,153,0.07) !important; border-color: rgba(52,211,153,0.4) !important; }
.free-code-item.active { background: rgba(52,211,153,0.1) !important; border-color: rgba(52,211,153,0.4) !important; }

/* Main */
.pg-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Toolbar */
.pg-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(5,7,20,0.7);
  flex-shrink: 0;
  gap: 12px;
}
.pgt-left { display: flex; align-items: center; gap: 12px; }
.pgt-filename { font-size: 0.85rem; font-weight: 600; font-family: var(--font-code); color: var(--text-secondary); }
.pgt-lang {
  font-size: 0.72rem;
  color: var(--purple);
  background: rgba(167,139,250,0.1);
  padding: 2px 8px;
  border-radius: 100px;
  font-weight: 600;
}
.pgt-right { display: flex; gap: 8px; align-items: center; }
.pgt-btn {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: var(--font-main);
  transition: var(--transition);
}
.pgt-clear { background: rgba(255,255,255,0.04); border: 1px solid var(--border); color: var(--text-muted); }
.pgt-clear:hover { color: var(--text-primary); background: rgba(255,255,255,0.07); }
.pgt-reset { background: rgba(255,255,255,0.04); border: 1px solid var(--border); color: var(--text-secondary); }
.pgt-reset:hover { border-color: var(--purple); color: var(--purple); }
.pgt-run {
  background: var(--gradient-main);
  color: white;
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
  border: none;
  padding: 8px 20px;
  font-size: 0.88rem;
}
.pgt-run:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(124,58,237,0.4); }
.pgt-run.running { animation: pulse 1s infinite; }

/* Run Mode Toggle */
.run-mode-toggle {
  display: flex;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
  flex-shrink: 0;
}
.rmt-btn {
  padding: 5px 12px;
  border-radius: 5px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
  white-space: nowrap;
}
.rmt-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.rmt-btn.active {
  background: var(--gradient-main);
  color: white;
  box-shadow: 0 2px 10px rgba(124,58,237,0.3);
}

/* ============================================
   EDITOR AREA — ACE + OUTPUT
   ============================================ */
.pg-editor-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: 1;
  overflow: hidden;
}

.pg-editor-wrap {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow: hidden;
}

.pge-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.25);
  flex-shrink: 0;
}

.line-count { font-family: var(--font-code); font-size: 0.72rem; color: var(--text-muted); }

/* Ace Editor Container — THIS IS THE KEY ELEMENT */
.ace-editor-container {
  flex: 1;
  width: 100%;
  min-height: 0;
  position: relative;
  font-size: 14px;
}

/* Ace editor theme overrides to match our design */
.ace-editor-container .ace_editor {
  font-family: 'JetBrains Mono', monospace !important;
  background: #080c1f !important;
}
.ace-editor-container .ace_gutter {
  background: #060a1a !important;
  border-right: 1px solid rgba(255,255,255,0.04) !important;
  color: #3d4a6b !important;
}
.ace-editor-container .ace_gutter-active-line {
  background: rgba(167,139,250,0.08) !important;
}
.ace-editor-container .ace_active-line {
  background: rgba(167,139,250,0.04) !important;
}
.ace-editor-container .ace_cursor {
  color: #a78bfa !important;
  border-left-width: 2px !important;
}
.ace-editor-container .ace_selection {
  background: rgba(167,139,250,0.25) !important;
}
.ace-editor-container .ace_scrollbar::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.ace-editor-container .ace_scrollbar::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
}

/* ============================================
   OUTPUT PANEL
   ============================================ */
.pg-output-wrap {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.output-status { display: flex; align-items: center; gap: 6px; font-size: 0.78rem; }
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: var(--transition);
}
.status-dot.running { background: var(--yellow); animation: pulse 0.8s infinite; }
.status-dot.success { background: var(--green); }
.status-dot.error { background: #f87171; }

.output-area {
  flex: 1;
  padding: 14px;
  font-family: var(--font-code);
  font-size: 0.82rem;
  line-height: 1.7;
  overflow-y: auto;
  background: #050810;
  color: var(--text-secondary);
}
.output-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 10px;
  text-align: center;
  color: var(--text-muted);
  opacity: 0.5;
  font-family: var(--font-main);
}
.output-line { display: flex; gap: 4px; padding: 1px 0; }
.out-prefix { color: #4b5563; user-select: none; }
.out-result { color: #a5f3fc; }
.out-success { color: var(--green); }
.out-error { color: #f87171; }
.out-info { color: var(--purple); }
.out-header { color: var(--yellow); font-weight: 700; }
.out-divider { color: #1f2937; user-select: none; }
.out-table { font-family: var(--font-code); color: #94a3b8; }

/* Visualization */
.viz-area {
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.viz-area .pge-header { border-top: none; }
#vizCanvas { display: block; width: 100%; background: #050810; }

/* Concepts Panel */
.concepts-panel {
  border-top: 1px solid var(--border);
  padding: 10px 16px;
  background: rgba(167,139,250,0.04);
  flex-shrink: 0;
  min-height: 50px;
}
.cp-title { font-size: 0.75rem; font-weight: 700; color: var(--purple); margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.06em; }
.cp-content { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }

/* kbd badge */
kbd {
  display: inline-block;
  padding: 1px 6px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.78rem;
  font-family: var(--font-code);
  color: var(--text-secondary);
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1000px) {
  .pg-layout { grid-template-columns: 1fr; height: auto; }
  .pg-sidebar { height: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .pgs-templates { flex-direction: row; flex-wrap: nowrap; overflow-x: auto; padding: 8px; }
  .template-item { flex-shrink: 0; }
  .pg-editor-area { grid-template-columns: 1fr; height: 70vh; }
  .pg-editor-wrap { border-right: none; border-bottom: 1px solid var(--border); min-height: 300px; }
}

@media (max-width: 800px) {
  .run-mode-toggle { display: none; }
  .pgt-right { gap: 6px; }
  .pg-toolbar { flex-wrap: wrap; }
}