:root {
  --bg: #f7f2c6;
  --bg-2: #efe2a4;
  --panel: #fff8d6;
  --border: #b2a160;
  --text: #1a1a1a;
  --muted: #4c4732;
  --link: #1b3b8f;
  --accent: #f3d97d;
  --accent-2: #ecd067;
  --shadow: rgba(56, 46, 16, 0.12);
  --sidebar: #171208;
  --sidebar-text: #f4e6b0;
  --sidebar-muted: #d9c88d;
}

* {
  box-sizing: border-box;
}

.hidden {
  display: none;
}

body {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Garamond", serif;
  color: var(--text);
  background: radial-gradient(circle at 20% 20%, #fff7d3 0%, var(--bg) 38%, var(--bg-2) 100%);
}

.layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  min-height: 100vh;
}

.sidebar {
  background: linear-gradient(160deg, #1a140a, #0f0b05 70%);
  color: var(--sidebar-text);
  padding: 24px 18px;
  border-right: 2px solid #231a0b;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  display: grid;
  gap: 6px;
}

.brand-mark {
  font-size: 24px;
  letter-spacing: 0.5px;
}

.brand-sub {
  font-size: 13px;
  color: var(--sidebar-muted);
}

.nav {
  display: grid;
  gap: 8px;
}

.nav-link {
  color: var(--sidebar-text);
  text-decoration: none;
  padding: 8px 10px;
  border: 1px solid transparent;
  background: rgba(244, 230, 176, 0.08);
}

.nav-link:hover {
  border-color: rgba(244, 230, 176, 0.3);
}

.nav-link.active {
  border-color: rgba(244, 230, 176, 0.5);
  background: rgba(244, 230, 176, 0.2);
}

.sidebar-note {
  font-size: 12px;
  color: var(--sidebar-muted);
  margin-top: auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px 28px;
  background: #efe28a;
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow: none;
}

.header h1 {
  margin: 0 0 6px;
  font-size: 28px;
}

.header p {
  margin: 0;
  color: var(--muted);
}

.header-note {
  font-size: 13px;
  color: var(--muted);
}

.main {
  padding: 24px 32px 48px;
  max-width: 1200px;
}

section {
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}

h2 {
  margin-top: 0;
  font-size: 22px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 16px;
  box-shadow: 0 10px 18px var(--shadow);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  align-items: start;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  min-width: 0;
}

input, select, textarea, button {
  font: inherit;
}

input, select, textarea {
  border: 1px solid var(--border);
  padding: 6px 8px;
  background: #fffef1;
  width: 100%;
}

input:disabled, select:disabled, textarea:disabled {
  background: #f2f0db;
  color: #777;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

button {
  background: #fff3a2;
  border: 1px solid var(--border);
  padding: 6px 14px;
  cursor: pointer;
}

button:hover {
  background: #fff8c7;
}

.label {
  font-weight: bold;
  margin-bottom: 4px;
}

.working {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
  background: #fff3a2;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.working.hidden {
  display: none;
}

.working .working-label {
  font-weight: bold;
}

.working .dots span {
  display: inline-block;
  opacity: 0.2;
  animation: working-blink 1.4s infinite;
}

.working .dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.working .dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes working-blink {
  0%, 20% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.2;
  }
}

.output pre {
  background: #fffef1;
  border: 1px solid var(--border);
  padding: 10px;
  min-height: 70px;
  white-space: pre-wrap;
}

pre {
  background: #fffef1;
  border: 1px solid var(--border);
  padding: 10px;
  overflow-x: auto;
}

.callout {
  background: #fff3a2;
  border: 1px solid var(--border);
  padding: 10px;
  font-size: 14px;
}

.hint {
  font-size: 13px;
  color: var(--muted);
}

.search-disabled {
  display: grid;
  gap: 16px;
}

.search-banner {
  padding: 10px 12px;
  border: 1px solid var(--border);
  background: #fff3a2;
}

.stage-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.stage-card {
  background: #fffef1;
  border: 1px solid var(--border);
  padding: 12px;
  box-shadow: 0 1px 0 var(--shadow);
}

.stage-title {
  font-weight: bold;
  margin-bottom: 6px;
}

.stage-options {
  margin: 8px 0 0;
  padding-left: 16px;
  font-size: 13px;
  color: var(--muted);
}

.search-cta {
  border: 1px dashed var(--border);
  padding: 12px;
  background: #fff7cf;
}

.tabbar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid var(--border);
  background: #fff3a2;
  padding: 6px 14px;
  cursor: pointer;
}

.tab.active {
  background: #fffef1;
  font-weight: bold;
}

.tabpanel {
  display: none;
}

.tabpanel.active {
  display: block;
}

.inputs {
  display: grid;
  gap: 16px;
  margin-top: 12px;
}

.input-block {
  border: 1px solid var(--border);
  padding: 12px;
  background: #fffef1;
}

.input-title {
  font-weight: bold;
  margin-bottom: 8px;
}

.source-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.source {
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: #fff3a2;
}

.source.active {
  background: #fffef1;
  font-weight: bold;
}

.source-panel {
  display: none;
}

.source-panel.active {
  display: block;
}

.examples {
  margin-top: 14px;
}

.example-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.example-list button {
  background: #fffef1;
}

.helper {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 8px;
  font-size: 14px;
  flex-wrap: wrap;
}

.helper a {
  color: var(--link);
  text-decoration: none;
}

.helper a:hover {
  text-decoration: underline;
}

code {
  background: #fffef1;
  padding: 0 4px;
}

.cli-preview {
  margin-top: 12px;
  font-size: 13px;
}

.cli-preview code {
  display: block;
  padding: 10px;
  border: 1px dashed var(--border);
  background: #fffdf1;
  white-space: pre-wrap;
}

.mixture-panel {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed var(--border);
  background: #fffdf1;
  display: grid;
  gap: 12px;
}

.mixture-panel.hidden {
  display: none;
}

.mixture-header {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
}

.mixture-editor {
  display: grid;
  gap: 12px;
}

.mixture-card {
  border: 1px solid var(--border);
  background: #fffef1;
  padding: 10px;
  box-shadow: 0 1px 0 var(--shadow);
  display: grid;
  gap: 10px;
}

.mixture-title {
  font-weight: bold;
}

.mixture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px;
}

.expert-card {
  border: 1px dashed var(--border);
  background: #fff7cf;
  padding: 10px;
  display: grid;
  gap: 8px;
}

.expert-header {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
}

.expert-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.mixture-nested {
  border-left: 2px solid var(--border);
  padding-left: 10px;
  margin-top: 6px;
}

.mixture-json pre {
  max-height: 260px;
  overflow-y: auto;
}

.aixi-visual {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(220px, 1fr) minmax(200px, 0.7fr);
  gap: 14px;
  margin-top: 12px;
}

.aixi-board {
  border: 1px solid var(--border);
  padding: 12px;
  background: #fffef1;
  min-height: 160px;
}

.aixi-log, .aixi-eval {
  border: 1px solid var(--border);
  padding: 12px;
  background: #fffef1;
  min-height: 160px;
}

.aixi-steps {
  display: grid;
  gap: 6px;
}

.aixi-step {
  display: grid;
  gap: 2px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border);
  font-size: 12px;
}

.coin-row {
  display: flex;
  gap: 6px;
  margin: 8px 0;
  flex-wrap: wrap;
}

.coin {
  border: 1px solid var(--border);
  background: var(--accent);
  padding: 4px 8px;
  border-radius: 999px;
  font-weight: bold;
}

.rps-row,
.kuhn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0;
}

.rps-card,
.kuhn-card {
  border: 1px solid var(--border);
  background: #fff8d6;
  padding: 6px 10px;
  font-weight: bold;
}

.board-meta {
  font-size: 12px;
  color: var(--muted);
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.stack {
  display: grid;
  gap: 12px;
}

.stack-item {
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border);
}

.stack-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.bullet-list {
  margin: 0;
  padding-left: 18px;
}

.code-links {
  margin-top: 10px;
  font-size: 13px;
}

.code-links summary {
  cursor: pointer;
}

.code-list {
  margin: 8px 0 0;
  padding-left: 18px;
}

.code-list a {
  color: var(--link);
  text-decoration: none;
}

.code-list a:hover {
  text-decoration: underline;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 2px solid #231a0b;
  }

  .main {
    padding: 18px 20px 40px;
  }

  .aixi-visual {
    grid-template-columns: 1fr;
  }
}