/* ── Playground — Dark theme ──────────────────────────────────── */

:root {
  --bg-deep:   #060d1a;
  --bg-panel:  #0c1829;
  --bg-card:   #101e34;
  --bg-input:  #0a1525;
  --bg-hover:  #142440;
  --border:    rgba(56, 96, 150, 0.3);
  --border-hi: rgba(56, 160, 255, 0.35);
  --text:      #dfe6ee;
  --text-dim:  #7a8da3;
  --text-muted:#5a6f88;
  --accent:    #38bdf8;
  --env:       #42a5f5;
  --perc:      #ab47bc;
  --reas:      #7c4dff;
  --mem:       #66bb6a;
  --refl:      #26c6da;
  --code-bg:   #0b1422;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
}

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

body {
  font-family: var(--sans);
  background: var(--bg-deep);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

code { font-family: var(--mono); font-size: 0.88em; color: var(--accent); }

/* ── Home button ─────────────────────────────────────────── */

.pg-home-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0 16px;
  padding: 8px 18px;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}

.pg-home-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hi);
}

/* ── Layout ──────────────────────────────────────────────── */

.pg-layout {
  display: grid;
  grid-template-columns: 260px 1fr 280px;
  gap: 16px;
  padding: 16px;
  min-height: 100vh;
}

/* ── Panels ──────────────────────────────────────────────── */

.pg-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

.pg-panel-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.pg-panel-head h2 {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pg-panel-head-icon { color: var(--accent); font-size: 1rem; }
.pg-panel-sub { font-size: 0.75rem; color: var(--text-dim); margin-top: 1px; }

/* ── Left Sidebar ────────────────────────────────────────── */

.pg-left .pg-panel {
  height: 100%;
  overflow-y: auto;
}

.pg-mod {
  padding: 14px 0;
  border-top: 1px solid var(--border);
}

.pg-mod:first-of-type { border-top: none; padding-top: 0; }

.pg-mod-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.pg-mod-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
}

.pg-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.pg-dot--env  { background: var(--env); }
.pg-dot--perc { background: var(--perc); }
.pg-dot--reas { background: var(--reas); }
.pg-dot--mem  { background: var(--mem); }
.pg-dot--refl { background: var(--refl); }

.pg-field-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 4px;
  font-weight: 500;
}

.pg-select {
  position: relative;
  margin-bottom: 8px;
}

.pg-select select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  padding: 8px 32px 8px 12px;
  font-size: 0.82rem;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.pg-select select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.15);
}

.pg-select::after {
  content: '';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--text-dim);
  pointer-events: none;
}

.pg-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.pg-hint code {
  font-size: 0.68rem;
  padding: 1px 4px;
  background: rgba(56, 189, 248, 0.1);
  border-radius: 3px;
}

.is-hidden { display: none !important; }

/* ── Perception auto-select badge ───────────────────────── */

.pg-mod-head {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pg-auto-badge {
  margin-left: auto;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mem);
  background: rgba(102, 187, 106, 0.15);
  border: 1px solid rgba(102, 187, 106, 0.3);
  padding: 2px 7px;
  border-radius: 4px;
  animation: fadeout-badge 2s forwards;
}

@keyframes fadeout-badge {
  0%   { opacity: 1; }
  60%  { opacity: 1; }
  100% { opacity: 0; }
}

/* ── Compatibility warning ───────────────────────────────── */

.pg-compat-warn {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  margin-top: 8px;
  padding: 8px 10px;
  background: rgba(255, 167, 38, 0.08);
  border: 1px solid rgba(255, 167, 38, 0.3);
  border-radius: 7px;
  font-size: 0.7rem;
  color: #ffa726;
  line-height: 1.4;
}

.pg-compat-warn i { flex-shrink: 0; margin-top: 1px; }

/* ── Install hint ────────────────────────────────────────── */

.pg-install-hint {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 7px;
  padding: 6px 10px;
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 0.7rem;
  color: var(--text-dim);
}

.pg-install-hint i { color: var(--accent); flex-shrink: 0; font-size: 0.75rem; }
.pg-install-hint code { color: var(--accent); font-size: 0.68rem; }

/* ── Incompatible option dimming ─────────────────────────── */

select option:disabled,
select option.pg-opt-incompat {
  color: var(--text-muted);
  font-style: italic;
}

/* ── Module Combination Map ──────────────────────────────── */

.pg-map-row {
  display: flex;
  gap: 10px;
}

.pg-map-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pg-map-card:hover {
  border-color: var(--border-hi);
}

.pg-map-logo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.pg-map-name {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.pg-map-val {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}

.pg-map-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
}

/* ── Code Panel ──────────────────────────────────────────── */

.pg-code-panel { padding: 0; overflow: hidden; }

.pg-code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.pg-code-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pg-code-title h2 {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.pg-code-title-icon { color: var(--accent); }

.pg-code-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.pg-btn {
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}

.pg-btn:hover { background: var(--bg-hover); border-color: var(--border-hi); }

.pg-btn--tab.is-active {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--accent);
  color: var(--accent);
}

.pg-btn--copy i,
.pg-btn--download i { margin-right: 4px; }

.pg-code-editor {
  position: relative;
  display: flex;
  background: var(--code-bg);
  max-height: 520px;
  overflow-y: auto;
}

.pg-code-gutter {
  flex-shrink: 0;
  padding: 14px 0;
  width: 44px;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--text-muted);
  user-select: none;
  border-right: 1px solid var(--border);
}

.pg-code-gutter div { padding-right: 10px; }

.pg-code-pre {
  flex: 1;
  margin: 0;
  padding: 14px 16px;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text);
  overflow-x: auto;
  white-space: pre;
  tab-size: 4;
}

.pg-code-inline-copy {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: var(--sans);
  font-size: 0.7rem;
  color: var(--text-dim);
  background: rgba(12, 24, 41, 0.85);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 3px 8px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
}

.pg-code-editor:hover .pg-code-inline-copy { opacity: 1; }
.pg-code-inline-copy:hover { color: var(--accent); border-color: var(--accent); }

.pg-code-footer {
  display: flex;
  justify-content: flex-end;
  padding: 10px 18px;
  border-top: 1px solid var(--border);
}

/* Syntax highlighting */
.pg-code-pre .str { color: #66bb6a; }
.pg-code-pre .cmt { color: #546e7a; font-style: italic; }
.pg-code-pre .kw  { color: #ce93d8; }
.pg-code-pre .num { color: #ffab40; }
.pg-code-pre .fn  { color: #4fc3f7; }

/* ── Right Sidebar ───────────────────────────────────────── */

.pg-right {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pg-setup-card { text-align: center; }

.pg-setup-head {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  color: var(--text-dim);
}

.pg-setup-env-badge {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid var(--env);
  background: rgba(66, 165, 245, 0.08);
}

.pg-setup-env-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.pg-setup-env-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

/* Module Summary */
.pg-summary { padding: 16px 18px; }

.pg-summary-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  color: var(--text-dim);
}

.pg-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 5px 0;
  font-size: 0.78rem;
  border-bottom: 1px solid rgba(56, 96, 150, 0.15);
}

.pg-summary-row span:first-child { color: var(--text-dim); font-weight: 500; }
.pg-summary-row span:last-child  { color: var(--text); font-weight: 600; text-align: right; }

/* How to Run */
.pg-howto { padding: 16px 18px; }

.pg-howto-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  color: var(--text-dim);
}

.pg-howto-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pg-howto-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--text);
  line-height: 1.4;
}

.pg-howto-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Start Agent Button */
.pg-btn-start {
  width: 100%;
  padding: 14px;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(135deg, #0ea5e9, #06b6d4);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: box-shadow 0.2s, transform 0.15s;
  text-transform: uppercase;
}

.pg-btn-start:hover {
  box-shadow: 0 0 24px rgba(14, 165, 233, 0.45);
  transform: translateY(-1px);
}

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

/* Observation card */
.pg-obv { padding: 16px 18px; }

.pg-obv-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.pg-obv-head-icon { color: var(--accent); font-size: 0.9rem; }

.pg-obv-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.pg-obv-meta { margin-bottom: 14px; }

.pg-obv-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  border-bottom: 1px solid rgba(56, 96, 150, 0.15);
}

.pg-obv-meta-key {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-weight: 500;
}

.pg-obv-meta-val {
  font-size: 0.74rem;
  color: var(--text);
  font-weight: 600;
}

.pg-obv-meta-code {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

.pg-obv-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pg-obv-step {
  padding: 10px 12px;
  border-radius: 8px;
  border-left: 3px solid var(--border);
  background: var(--bg-card);
}

.pg-obv-step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.pg-obv-step-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-dim);
}

.pg-obv-step-badge {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: 4px;
}

.pg-obv-step--initial_correction { border-left-color: #ffa726; }
.pg-obv-step--initial_correction .pg-obv-step-badge { background: rgba(255,167,38,0.15); color: #ffa726; }

.pg-obv-step--turning_point { border-left-color: #7c4dff; }
.pg-obv-step--turning_point .pg-obv-step-badge { background: rgba(124,77,255,0.15); color: #b388ff; }

.pg-obv-step--success { border-left-color: #66bb6a; }
.pg-obv-step--success .pg-obv-step-badge { background: rgba(102,187,106,0.15); color: #66bb6a; }

.pg-obv-step--completion { border-left-color: var(--accent); }
.pg-obv-step--completion .pg-obv-step-badge { background: rgba(56,189,248,0.15); color: var(--accent); }

.pg-obv-step-action {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text);
}

.pg-obv-step-detail {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Center column ── */
.pg-center {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 1100px) {
  .pg-layout {
    grid-template-columns: 240px 1fr;
  }
  .pg-right {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }
  .pg-btn-start { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .pg-layout {
    grid-template-columns: 1fr;
  }
  .pg-map-row {
    flex-wrap: wrap;
  }
  .pg-map-card { min-width: 100px; }
}

/* ── How to use panel ────────────────────────────────────── */

.pg-usage-panel { padding: 16px 18px; }

.pg-usage-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.pg-usage-head h3 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.pg-usage-icon { color: var(--accent); font-size: 0.9rem; }

.pg-usage-steps { display: flex; flex-direction: column; gap: 14px; }

.pg-usage-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.pg-usage-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.pg-usage-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 5px;
}

.pg-usage-optional {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.pg-usage-code {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  white-space: pre;
  line-height: 1.6;
}

/* ── Observation demo note ───────────────────────────────── */

.pg-obv-subtitle {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 1px;
  font-style: italic;
}

.pg-obv-demo-note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 8px 10px;
  margin-bottom: 12px;
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.15);
  border-radius: 7px;
  font-size: 0.68rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.pg-obv-demo-note i { color: var(--accent); flex-shrink: 0; margin-top: 1px; font-size: 0.75rem; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(56, 96, 150, 0.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(56, 96, 150, 0.6); }

/* ── Copied flash ── */
.pg-btn--copy.is-copied,
.pg-code-inline-copy.is-copied {
  color: var(--mem) !important;
  border-color: var(--mem) !important;
}

/* ── Start button states ─────────────────────────────────── */

.pg-btn-start.is-running {
  background: linear-gradient(135deg, #1e3a5f, #1a4a6e);
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.pg-btn-start.is-done {
  background: linear-gradient(135deg, #1b4d2e, #1e6b38);
  pointer-events: none;
}

.pg-btn-start.is-failed {
  background: linear-gradient(135deg, #5c1a1a, #7b2222);
  pointer-events: none;
}

/* ── Spinner ─────────────────────────────────────────────── */

.pg-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Step enter animation ────────────────────────────────── */

.pg-obv-step {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.pg-obv-step--enter {
  opacity: 0;
  transform: translateY(6px);
}

/* ── Additional step status colors ──────────────────────── */

.pg-obv-step--init { border-left-color: var(--accent); }
.pg-obv-step--init .pg-obv-step-badge { background: rgba(56,189,248,0.12); color: var(--accent); }

.pg-obv-step--action { border-left-color: var(--text-dim); }
.pg-obv-step--action .pg-obv-step-badge { background: rgba(122,141,163,0.12); color: var(--text-dim); }

.pg-obv-step--reason { border-left-color: var(--reas); }
.pg-obv-step--reason .pg-obv-step-badge { background: rgba(124,77,255,0.12); color: #b388ff; }

.pg-obv-step--success { border-left-color: var(--mem); }
.pg-obv-step--success .pg-obv-step-badge { background: rgba(102,187,106,0.15); color: var(--mem); }

.pg-obv-step--fail { border-left-color: #ef5350; }
.pg-obv-step--fail .pg-obv-step-badge { background: rgba(239,83,80,0.12); color: #ef5350; }

/* ── Observation panel scroll ────────────────────────────── */
.pg-obv-steps {
  max-height: 320px;
  overflow-y: auto;
}