/* ===== PLAYGROUND PAGE ===== */

.pg-body {
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ===== NAV ===== */
.pg-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.pg-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.pg-logo:hover {
  color: var(--accent);
  transition: color 0.2s;
}

.pg-nav-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  padding: 3px 10px;
  border-radius: 100px;
}

/* ===== SPLIT LAYOUT ===== */
.pg-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

/* ===== SHARED PANEL ===== */
.pg-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--border);
}

.pg-output-panel {
  border-right: none;
}

.pg-panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.pg-panel-dots {
  display: flex;
  gap: 6px;
}

.pd {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.pd.red    { background: #ff5f57; }
.pd.yellow { background: #ffbd2e; }
.pd.green  { background: #28c840; }

.pg-panel-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: 8px;
  flex: 1;
}

.pg-lang-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ===== STATUS INDICATOR ===== */
.pg-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid transparent;
  transition: all 0.3s;
}

.pg-status.idle {
  color: var(--text-muted);
  border-color: var(--border);
  background: var(--bg-card);
}

.pg-status.running {
  color: var(--warning);
  border-color: rgba(255, 107, 53, 0.3);
  background: rgba(255, 107, 53, 0.08);
}

.pg-status.done {
  color: var(--success);
  border-color: rgba(0, 232, 120, 0.3);
  background: rgba(0, 232, 120, 0.08);
}

.pg-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.pg-status.running .pg-status-dot {
  animation: pulse-dot 1s ease infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.7); }
}

/* ===== PANEL BODY ===== */
.pg-panel-body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--bg-terminal);
}

/* ===== CODE EDITOR ===== */
.pg-code-editor {
  width: 100%;
  height: 100%;
  background: var(--bg-terminal);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  padding: 20px;
  border: none;
  outline: none;
  resize: none;
  display: block;
  tab-size: 2;
}

.pg-code-editor::placeholder {
  color: var(--text-muted);
  line-height: 1.8;
}

.pg-code-editor.shake {
  animation: shake 0.35s ease;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

/* ===== PANEL FOOTER ===== */
.pg-panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  gap: 12px;
}

.pg-examples {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pg-examples-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.pg-example-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.pg-example-btn:hover,
.pg-example-btn.active {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--accent-glow);
}

/* ===== ANALYZE BUTTON ===== */
.pg-analyze-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--bg-primary);
  background: var(--accent);
  border: none;
  padding: 8px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.pg-analyze-btn:hover {
  background: #33ddff;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
  transform: translateY(-1px);
}

.pg-analyze-btn:active {
  transform: translateY(0);
}

.pg-analyze-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.pg-btn-arrow {
  font-size: 1rem;
  transition: transform 0.2s;
}

.pg-analyze-btn:hover .pg-btn-arrow {
  transform: translateX(3px);
}

/* ===== TRACE OUTPUT ===== */
#trace-output {
  padding: 20px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
  scroll-behavior: smooth;
}

/* Scrollbar */
#trace-output::-webkit-scrollbar { width: 4px; }
#trace-output::-webkit-scrollbar-track { background: transparent; }
#trace-output::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ===== EMPTY STATE ===== */
.pg-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 40px;
  gap: 16px;
}

.pg-empty-icon {
  font-size: 2.4rem;
  color: var(--accent-dim);
  filter: blur(0.5px);
}

.pg-empty-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-secondary);
}

.pg-empty-sub {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
}

/* ===== TRACE LINES ===== */
.tr-line {
  display: flex;
  gap: 12px;
  color: var(--text-secondary);
  margin-bottom: 2px;
  align-items: baseline;
}

.tr-label {
  display: inline-block;
  font-weight: 500;
  min-width: 110px;
  flex-shrink: 0;
}

.tr-scan .tr-label     { color: var(--accent); }
.tr-found .tr-label    { color: var(--text-primary); }
.tr-warning .tr-label  { color: var(--warning); }
.tr-conflict .tr-label { color: var(--warning); }
.tr-confidence .tr-label { color: var(--confidence); }
.tr-suggestion .tr-label { color: var(--success); }

.tr-scan .tr-text     { color: var(--text-muted); }
.tr-found .tr-text    { color: var(--text-secondary); }
.tr-warning .tr-text  { color: rgba(255,107,53,0.8); }
.tr-conflict .tr-text { color: rgba(255,107,53,0.9); }
.tr-confidence .tr-text { color: var(--text-secondary); }
.tr-suggestion .tr-text { color: rgba(0,232,120,0.9); }

/* ===== CURSOR ===== */
.tr-cursor {
  height: 22px;
  display: flex;
  align-items: center;
}

.tr-cursor-blink {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ===== ERROR ===== */
.tr-error {
  color: var(--warning);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* ===== OUTPUT FOOTER ===== */
.pg-output-footer {
  justify-content: flex-end;
}

.pg-trace-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 800px) {
  .pg-body {
    height: auto;
    overflow: auto;
  }

  .pg-main {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .pg-panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
    height: 50dvh;
  }

  .pg-output-panel {
    height: 50dvh;
    border-bottom: none;
  }

  .pg-panel-body {
    overflow: auto;
  }
}