.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  background: #f5f7fa;
  color: #17202a;
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid #d7dde5;
  padding: 18px 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 6px 18px;
  border-bottom: 1px solid #e6eaf0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #1d4ed8;
  color: #ffffff;
  font-weight: 700;
}

.brand h1 {
  margin: 0;
  font-size: 17px;
  line-height: 22px;
}

.brand span,
.topbar span {
  color: #657386;
  font-size: 12px;
}

.tabs {
  display: grid;
  gap: 6px;
  margin-top: 18px;
}

.tabs button,
button {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid #cfd7e3;
  border-radius: 6px;
  background: #ffffff;
  color: #17202a;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}

.tabs button {
  justify-content: flex-start;
  padding: 0 10px;
}

button:hover:not(:disabled) {
  border-color: #1d4ed8;
  color: #1d4ed8;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
}

button.active,
.tabs button.active,
.segmented button.active {
  background: #eaf1ff;
  border-color: #1d4ed8;
  color: #1d4ed8;
}

button.secondary {
  background: #f9fafb;
}

button.ghost {
  background: transparent;
}

button.danger {
  border-color: #f2c8c8;
  color: #b42318;
}

button.danger:hover:not(:disabled) {
  border-color: #b42318;
  color: #8a1f16;
}

.icon-only {
  width: 34px;
  padding: 0;
}

.workspace {
  min-width: 0;
  padding: 18px;
}

.topbar {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.topbar h2 {
  margin: 0;
  font-size: 22px;
  line-height: 28px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.notice {
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid #b9dfc5;
  border-radius: 6px;
  background: #eefbf2;
  color: #166534;
}

.notice.error {
  border-color: #f1b7b7;
  background: #fff1f1;
  color: #9f1c1c;
}

.panel {
  background: #ffffff;
  border: 1px solid #d7dde5;
  border-radius: 8px;
  padding: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 14px;
}

label,
.field {
  display: grid;
  gap: 6px;
  align-content: start;
}

label span,
.field > span {
  color: #4b5b6f;
  font-size: 12px;
  font-weight: 600;
}

input {
  width: 100%;
  box-sizing: border-box;
  min-height: 34px;
  border: 1px solid #cfd7e3;
  border-radius: 6px;
  background: #ffffff;
  color: #17202a;
  font: inherit;
  padding: 0 10px;
  outline: none;
}

input:focus {
  border-color: #1d4ed8;
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.12);
}

.checkbox {
  grid-template-columns: 18px 1fr;
  align-items: center;
  gap: 8px;
}

.checkbox input {
  width: 16px;
  min-height: 16px;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}

.toolbar.split {
  justify-content: space-between;
  margin-top: 0;
  margin-bottom: 12px;
}

.search {
  max-width: 360px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid #e2e7ee;
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 840px;
  border-collapse: collapse;
  table-layout: fixed;
}

th,
td {
  height: 44px;
  border-bottom: 1px solid #e8edf3;
  padding: 0 10px;
  text-align: left;
  vertical-align: middle;
  overflow: hidden;
  text-overflow: ellipsis;
}

th {
  background: #f8fafc;
  color: #4b5b6f;
  font-size: 12px;
  font-weight: 700;
}

tr:last-child td {
  border-bottom: none;
}

.name-cell {
  font-weight: 700;
}

.path-cell {
  max-width: 280px;
  color: #4b5b6f;
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.row-actions button {
  min-height: 30px;
  padding: 0 8px;
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  background: #eef2f7;
  color: #4b5b6f;
  font-size: 12px;
  line-height: 22px;
}

.badge.downloaded,
.badge.installed,
.badge.local {
  background: #e8f7ee;
  color: #166534;
}

.badge.check_failed,
.badge.error {
  background: #fff1f1;
  color: #9f1c1c;
}

.empty {
  height: 72px;
  text-align: center;
  color: #657386;
}

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid #d7dde5;
  }

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

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