:root {
  --color-primary: #0f766e;
  --color-secondary: #2563eb;
  --color-success: #15803d;
  --color-warning: #b45309;
  --color-error: #b91c1c;
  --color-neutral-50: #f8f9fa;
  --color-neutral-100: #f3f4f6;
  --color-neutral-200: #e5e7eb;
  --color-neutral-300: #d1d5db;
  --color-neutral-500: #6b7280;
  --color-neutral-700: #374151;
  --color-neutral-900: #111827;
  --text-xs: 12px;
  --text-sm: 14px;
  --text-base: 16px;
  --text-lg: 20px;
  --text-xl: 24px;
  --text-2xl: 32px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  background: var(--color-neutral-50);
  color: var(--color-neutral-900);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.5;
}

.shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid var(--color-neutral-200);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  padding: var(--space-8);
}

.eyebrow {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0;
  margin: 0 0 var(--space-1);
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-neutral-200);
  margin: var(--space-4) 0;
}

h1 {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-2);
}

h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-1);
}

h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-3);
}

.muted {
  color: var(--color-neutral-500);
}

.nav {
  display: grid;
  gap: var(--space-2);
}

.nav-item,
.button {
  border: 1px solid var(--color-neutral-300);
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  min-height: 40px;
}

.nav-item {
  background: #ffffff;
  color: var(--color-neutral-700);
  padding: var(--space-2) var(--space-3);
  text-align: left;
}

.nav-item:hover,
.nav-item.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.button {
  background: #ffffff;
  color: var(--color-neutral-900);
  padding: var(--space-2) var(--space-4);
}

.button:hover {
  background: var(--color-neutral-100);
}

.button.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

.button.primary:hover {
  background: #0b5f59;
}

.workspace {
  padding: var(--space-8);
}

.topbar {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.card {
  background: #ffffff;
  border: 1px solid var(--color-neutral-200);
  border-radius: 8px;
  padding: var(--space-4);
}

.span-2 {
  grid-column: span 2;
}

.span-4 {
  grid-column: span 4;
}

.span-5 {
  grid-column: span 5;
}

.span-6 {
  grid-column: span 6;
}

.span-7 {
  grid-column: span 7;
}

.span-12 {
  grid-column: span 12;
}

.task-list,
.form-grid,
.actions,
.plain-list {
  display: grid;
  gap: var(--space-3);
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: var(--space-4);
}

.form-grid.single {
  grid-template-columns: 1fr;
}

label {
  color: var(--color-neutral-700);
  display: grid;
  gap: var(--space-1);
}

input,
select,
textarea {
  border: 1px solid var(--color-neutral-300);
  border-radius: 6px;
  color: var(--color-neutral-900);
  font: inherit;
  padding: var(--space-2);
  width: 100%;
}

textarea,
pre,
code {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

textarea:focus,
input:focus,
select:focus {
  border-color: var(--color-secondary);
  outline: 2px solid var(--color-neutral-100);
}

.output {
  background: var(--color-neutral-100);
  border-radius: 6px;
  margin: 0;
  min-height: 220px;
  overflow: auto;
  padding: var(--space-3);
  white-space: pre-wrap;
}

.output.compact {
  min-height: 180px;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pills span {
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: 6px;
  padding: var(--space-1) var(--space-2);
}

code {
  background: var(--color-neutral-100);
  border-radius: 6px;
  padding: var(--space-1) var(--space-2);
}

@media (max-width: 920px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-bottom: 1px solid var(--color-neutral-200);
    border-right: 0;
  }

  .nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workspace {
    padding: var(--space-4);
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .span-2,
  .span-4,
  .span-5,
  .span-6,
  .span-7 {
    grid-column: span 12;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}