* {
  box-sizing: border-box;
}

:root {
  --primary: #5340c8;
  --primary-hover: #4434a8;
  --fg: #1f2328;
  --muted: #636c76;
  --canvas: #ffffff;
  --subtle: #f6f8fa;
  --border: #d0d7de;
  --accent: #0969da;
  --success: #1a7f37;
  --danger: #cf222e;
  --warning-bg: #fff8c5;
}

body {
  margin: 0;
  color: var(--fg);
  background: var(--subtle);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  padding: 12px 24px;
  background: #24292f;
  color: #fff;
}

.brand,
.topnav a {
  color: #fff;
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.topnav {
  display: flex;
  gap: 14px;
}

.topnav a {
  color: rgba(255, 255, 255, 0.86);
  font-weight: 500;
}

.topnav a:hover {
  color: #fff;
}

.layout {
  width: 100%;
  margin: 0;
  padding: 18px 24px 36px;
}

.panel {
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px);
  gap: 16px;
  align-items: center;
  margin-bottom: 14px;
  padding: 14px 18px;
}

.hero-main {
  max-width: 780px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 4px;
}

.icon-badge,
.notice-icon,
.section-icon,
.button-icon,
.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.icon-badge i,
.notice-icon i,
.section-icon i,
.button-icon,
.nav-icon {
  line-height: 1;
}

.icon-badge {
  width: 24px;
  height: 24px;
  border: 1px solid rgba(83, 64, 200, 0.22);
  border-radius: 999px;
  background: #f0effc;
  color: var(--primary);
  font-size: 14px;
}

.section-icon {
  width: 24px;
  height: 24px;
  margin-right: 6px;
  border-radius: 6px;
  background: var(--subtle);
  color: var(--primary);
  font-size: 15px;
  vertical-align: -2px;
}

.button-icon,
.nav-icon {
  margin-right: 6px;
  font-size: 16px;
  vertical-align: -2px;
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.25;
}

h1 {
  font-size: 26px;
  font-weight: 700;
}

h2 {
  font-size: 18px;
  font-weight: 650;
}

p {
  margin: 6px 0 0;
  color: var(--muted);
}

.notice {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid #d8b60a;
  border-radius: 8px;
  background: var(--warning-bg);
  color: #3b2300;
  font-size: 12px;
  line-height: 1.4;
}

.notice-icon {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: #ffffff;
  color: #8a5a00;
  font-weight: 800;
}

.notice strong {
  display: block;
  margin-bottom: 2px;
}

.notice p {
  margin: 0;
  color: #3b2300;
}

.notice code {
  padding: 1px 5px;
  border: 1px solid rgba(138, 90, 0, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  color: #3b2300;
  font-size: 11px;
  font-weight: 700;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(380px, 0.8fr);
  gap: 16px;
  margin-bottom: 16px;
}

.bottom {
  align-items: start;
}

.panel-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.62fr);
  gap: 12px;
  margin-bottom: 4px;
}

.editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  gap: 12px;
  margin: 12px 0;
}

.editor-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--canvas);
}

.editor-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
  background: var(--subtle);
}

.editor-heading strong {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.editor-heading p {
  margin: 4px 0 0;
  font-size: 12px;
}

.editor-pill {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--canvas);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

label {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  font-weight: 600;
}

select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--canvas);
  color: var(--fg);
  outline: none;
}

select {
  min-height: 36px;
  padding: 6px 10px;
}

textarea {
  min-height: 220px;
  padding: 12px;
  resize: vertical;
  font-family:
    ui-monospace,
    SFMono-Regular,
    SF Mono,
    Menlo,
    Consolas,
    Liberation Mono,
    monospace;
  font-size: 13px;
  line-height: 1.5;
}

#code-preview {
  min-height: 280px;
}

#command {
  min-height: 180px;
}

.payload-label {
  color: var(--muted);
}

.CodeMirror {
  height: 360px;
  border: 0;
  font-family:
    ui-monospace,
    SFMono-Regular,
    SF Mono,
    Menlo,
    Consolas,
    Liberation Mono,
    monospace;
  font-size: 13px;
  line-height: 1.5;
}

.payload-card .CodeMirror {
  height: 280px;
}

.CodeMirror-gutters {
  border-right: 1px solid var(--border);
  background: #f6f8fa;
}

.CodeMirror-activeline-background {
  background: rgba(83, 64, 200, 0.06);
}

select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.16);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid rgba(31, 35, 40, 0.15);
  border-radius: 6px;
  background: #f6f8fa;
  color: var(--fg);
  cursor: pointer;
  font-weight: 600;
}

.btn:hover {
  background: #f3f4f6;
}

.btn-primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--subtle);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.badge.success {
  border-color: rgba(26, 127, 55, 0.35);
  background: #dafbe1;
  color: var(--success);
}

.badge.error {
  border-color: rgba(207, 34, 46, 0.35);
  background: #ffebe9;
  color: var(--danger);
}

.result-box {
  min-height: 444px;
  max-height: 560px;
  overflow: auto;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--subtle);
  color: var(--fg);
  font-family:
    ui-monospace,
    SFMono-Regular,
    SF Mono,
    Menlo,
    Consolas,
    Liberation Mono,
    monospace;
  font-size: 13px;
  line-height: 1.5;
}

.data-list,
.activity-log {
  display: grid;
  gap: 8px;
  min-height: 180px;
  max-height: 460px;
  overflow: auto;
  margin: 0;
  padding: 0;
}

.data-list.empty,
.activity-log:empty::before {
  display: grid;
  place-items: center;
  min-height: 180px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  color: var(--muted);
  content: "No activity yet.";
}

.data-item,
.activity-log li {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--subtle);
}

.data-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--accent);
  font-weight: 700;
}

.data-item pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family:
    ui-monospace,
    SFMono-Regular,
    SF Mono,
    Menlo,
    Consolas,
    Liberation Mono,
    monospace;
  font-size: 12px;
}

.activity-log {
  list-style: none;
}

.activity-log strong {
  color: var(--fg);
}

.activity-log small {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .editor-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .layout {
    padding: 16px;
  }

  .topbar,
  .hero,
  .workspace,
  .controls,
  .panel-title {
    grid-template-columns: 1fr;
  }

  .topbar,
  .panel-title {
    align-items: stretch;
    flex-direction: column;
  }
}