:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-surface-muted: #f9fafb;
  --color-ink: #17202a;
  --color-muted: #5d6673;
  --color-subtle: #8a94a3;
  --color-line: #d9dee7;
  --color-line-strong: #c7cfdb;
  --color-primary: #0f766e;
  --color-primary-dark: #0b4f4a;
  --color-blue: #2457a7;
  --color-warn: #b7791f;
  --color-danger: #b42318;
  --color-success: #137a42;
  --shadow-surface: 0 8px 18px rgba(31, 41, 55, 0.06);
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --header-height: 72px;
  --sidebar-width: 232px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  letter-spacing: 0;
}

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

button {
  border: 0;
}

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

h1 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

h2 {
  font-size: 22px;
  font-weight: 750;
  line-height: 1.15;
}

h3 {
  font-size: 15px;
  font-weight: 750;
  line-height: 1.25;
}

.app-header {
  align-items: flex-start;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  justify-content: space-between;
  min-height: var(--header-height);
  padding: var(--space-4);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  align-items: center;
  display: flex;
  gap: var(--space-3);
  min-width: 0;
}

.brand-mark {
  align-items: center;
  background: var(--color-ink);
  border-radius: var(--radius-md);
  color: #fff;
  display: grid;
  flex: 0 0 40px;
  font-size: 13px;
  font-weight: 800;
  height: 40px;
  place-items: center;
  width: 40px;
}

.header-status {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  width: 100%;
}

.eyebrow {
  color: var(--color-subtle);
  display: block;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0;
  line-height: 1.2;
  text-transform: uppercase;
}

.app-shell,
.layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: calc(100vh - var(--header-height));
}

.sidebar {
  background: #eef1f5;
  border-bottom: 1px solid var(--color-line);
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
  padding: var(--space-3);
}

.sidebar-label {
  display: none;
}

.nav-button {
  align-items: center;
  background: transparent;
  border-radius: var(--radius-md);
  color: var(--color-muted);
  cursor: pointer;
  display: flex;
  flex: 0 0 auto;
  font-weight: 650;
  min-height: 38px;
  padding: 0 var(--space-3);
  text-align: left;
  white-space: nowrap;
}

.nav-button.active,
.nav-button:hover {
  background: var(--color-surface);
  box-shadow: inset 0 -3px 0 var(--color-primary);
  color: var(--color-ink);
}

.workspace,
.content {
  min-width: 0;
  padding: var(--space-4);
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.page-header,
.section-heading {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.surface,
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-surface);
}

.surface {
  margin-bottom: var(--space-4);
  min-width: 0;
}

.surface-header {
  align-items: flex-start;
  border-bottom: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  justify-content: space-between;
  min-height: 56px;
  padding: var(--space-4);
}

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

.btn,
button {
  align-items: center;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  font-weight: 700;
  justify-content: center;
  min-height: 38px;
  padding: 0 var(--space-4);
  white-space: nowrap;
}

.btn:hover,
button:hover {
  background: var(--color-primary-dark);
}

.btn:disabled,
button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.btn--secondary,
button.secondary {
  background: var(--color-blue);
}

.btn--secondary:hover,
button.secondary:hover {
  background: #173f7d;
}

.status-pill {
  align-items: center;
  background: var(--color-surface-muted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  display: inline-flex;
  font-weight: 700;
  min-height: 32px;
  min-width: 82px;
  padding: 0 var(--space-3);
}

.status-pill.ok {
  background: #edf8f1;
  border-color: #b8dec7;
  color: var(--color-success);
}

.notice {
  color: var(--color-muted);
  padding: var(--space-4);
}

.notice.danger {
  color: var(--color-danger);
  font-weight: 700;
}

.login-actions {
  border-bottom: 1px solid var(--color-line);
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
}

.login-actions .btn {
  text-decoration: none;
}

.metric-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: var(--space-4);
}

.metric,
.kpi {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-surface);
  min-height: 82px;
  padding: var(--space-3);
}

.metric strong,
.kpi strong {
  display: block;
  font-size: 24px;
  line-height: 1.05;
}

.metric span,
.muted {
  color: var(--color-muted);
}

.ok {
  color: var(--color-success);
}

.warn {
  color: var(--color-warn);
}

.danger {
  color: var(--color-danger);
}

.dashboard-grid,
.split,
.stack {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

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

.inline-form,
.sim-form,
.form-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.form-actions {
  align-items: center;
  display: flex;
  justify-content: stretch;
}

.form-actions .btn,
.control-form > .btn,
.inline-form > .btn {
  width: 100%;
}

label {
  color: var(--color-muted);
  display: grid;
  gap: var(--space-1);
  font-size: 12px;
  font-weight: 700;
}

input,
select,
textarea {
  background: #fff;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  min-height: 40px;
  min-width: 0;
  padding: 0 var(--space-3);
  width: 100%;
}

textarea {
  line-height: 1.35;
  min-height: 112px;
  padding: var(--space-3);
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(36, 87, 167, 0.12);
  outline: none;
}

.chat-thread {
  display: grid;
  gap: var(--space-3);
  max-height: 52vh;
  overflow-y: auto;
  padding: var(--space-4);
}

.chat-message {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  display: grid;
  gap: var(--space-2);
  max-width: 100%;
  padding: var(--space-3);
}

.chat-message.user {
  background: #eef6ff;
  border-color: #cbdff9;
}

.chat-message.assistant {
  background: var(--color-surface-muted);
}

.chat-message strong {
  font-size: 12px;
  text-transform: uppercase;
}

.chat-form,
.skill-run-form {
  border-top: 1px solid var(--color-line);
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.record-list,
.list {
  display: grid;
}

.record,
.item {
  border-bottom: 1px solid var(--color-line);
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
  padding: var(--space-4);
}

.record:last-child,
.item:last-child {
  border-bottom: 0;
}

.record-main {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

.record-title {
  font-weight: 750;
  overflow-wrap: anywhere;
}

.record-body {
  color: var(--color-muted);
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.record-actions,
.actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: flex-start;
}

.actions button {
  min-height: 34px;
  padding: 0 var(--space-3);
}

.badge-row {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  justify-content: flex-start;
}

.badge {
  align-items: center;
  background: #eef2f6;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--color-muted);
  display: inline-flex;
  font-size: 12px;
  font-weight: 700;
  min-height: 24px;
  padding: 0 var(--space-2);
  white-space: nowrap;
}

.badge.ok {
  background: #edf8f1;
  color: var(--color-success);
}

.badge.warn {
  background: #fff7e8;
  color: var(--color-warn);
}

.badge.danger {
  background: #fff0ee;
  color: var(--color-danger);
}

.status-grid {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: 1fr;
  padding: var(--space-4);
}

.status-tile {
  background: var(--color-surface-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-1);
  min-height: 72px;
  padding: var(--space-3);
}

.status-tile strong {
  font-size: 18px;
}

.scenario-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
  margin-top: var(--space-4);
}

.surface > .scenario-grid {
  margin-top: 0;
  padding: var(--space-4);
}

.scenario {
  background: var(--color-surface-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
}

.timeline {
  display: grid;
}

.timeline .record {
  padding-left: var(--space-6);
  position: relative;
}

.timeline .record::before {
  background: var(--color-blue);
  border-radius: 999px;
  content: "";
  height: 8px;
  left: var(--space-3);
  position: absolute;
  top: 22px;
  width: 8px;
}

.empty {
  color: var(--color-muted);
  padding: var(--space-4);
}

@media (min-width: 560px) {
  .metric-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .chat-form {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .chat-form .btn {
    align-self: end;
  }

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

  .skill-run-form textarea {
    grid-column: 1 / -1;
  }

  .record,
  .item {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .badge-row,
  .record-actions,
  .actions {
    justify-content: flex-end;
  }

  .form-actions {
    justify-content: flex-end;
  }

  .form-actions .btn,
  .control-form > .btn,
  .inline-form > .btn {
    width: auto;
  }

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

@media (min-width: 760px) {
  .app-header {
    align-items: center;
    flex-direction: row;
    height: var(--header-height);
    padding: 0 var(--space-6);
  }

  .header-status {
    justify-content: flex-end;
    width: auto;
  }

  .page-header,
  .section-heading,
  .surface-header {
    align-items: center;
    flex-direction: row;
  }

  .workspace,
  .content {
    padding: var(--space-6);
  }
}

@media (min-width: 920px) {
  h2 {
    font-size: 24px;
  }

  .app-shell,
  .layout {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  }

  .sidebar {
    border-bottom: 0;
    border-right: 1px solid var(--color-line);
    flex-direction: column;
    height: calc(100vh - var(--header-height));
    overflow-x: visible;
    padding: var(--space-4);
    position: sticky;
    top: var(--header-height);
  }

  .sidebar-label {
    color: var(--color-subtle);
    display: block;
    font-size: 11px;
    font-weight: 750;
    line-height: 1.2;
    margin: var(--space-3) var(--space-2) var(--space-1);
    text-transform: uppercase;
  }

  .sidebar-label:first-child {
    margin-top: 0;
  }

  .nav-button {
    flex: initial;
    width: 100%;
  }

  .nav-button.active,
  .nav-button:hover {
    box-shadow: inset 3px 0 0 var(--color-primary);
  }

  .dashboard-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.75fr);
  }

  .split {
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  }

  .inline-form {
    grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  }

  .skill-run-form {
    grid-template-columns: minmax(180px, 0.9fr) minmax(160px, 0.7fr) minmax(220px, 1fr) minmax(120px, 0.5fr) auto;
  }

  .skill-run-form textarea {
    grid-column: 1 / -1;
  }

  .scenario-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}