:root {
  --da-bg: #f5f9ff;
  --da-surface: #ffffff;
  --da-surface-soft: #f8fbff;
  --da-border: #d9e7f7;
  --da-border-strong: #b9d3ef;
  --da-text: #132238;
  --da-muted: #60728a;
  --da-primary: #1677d2;
  --da-primary-dark: #0f5ea8;
  --da-primary-soft: #e8f3ff;
  --da-danger: #b42318;
  --da-warning: #b7791f;
  --da-shadow: 0 12px 30px rgba(25, 84, 146, 0.08);
}

html {
  background: var(--da-bg);
}

body {
  min-height: 100vh;
  margin-bottom: 0;
  background:
    linear-gradient(180deg, #eef7ff 0, var(--da-bg) 260px),
    var(--da-bg);
  color: var(--da-text);
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

.app-shell {
  max-width: 1240px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 1020;
  border-bottom: 1px solid rgba(185, 211, 239, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.app-navbar {
  min-height: 64px;
  padding: 0;
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--da-text);
  font-weight: 700;
  letter-spacing: 0;
}

.app-brand:hover {
  color: var(--da-primary-dark);
}

.app-brand-mark {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--da-primary), #53a9ff);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(22, 119, 210, 0.22);
}

.navbar-nav .nav-link {
  margin-left: 0.25rem;
  padding: 0.5rem 0.75rem;
  border-radius: 7px;
  color: var(--da-muted);
  font-weight: 600;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  background: var(--da-primary-soft);
  color: var(--da-primary-dark);
}

.app-main {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.app-footer {
  padding: 1.25rem 0;
  border-top: 1px solid var(--da-border);
  color: var(--da-muted);
  background: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
}

h1 {
  margin-bottom: 0.25rem;
  color: var(--da-text);
  font-size: 1.75rem;
  font-weight: 750;
}

h2,
.h5 {
  color: var(--da-text);
  font-weight: 700;
}

hr {
  border-color: var(--da-border);
  opacity: 1;
}

.text-muted {
  color: var(--da-muted) !important;
}

a {
  color: var(--da-primary);
}

a:hover {
  color: var(--da-primary-dark);
}

.alert {
  border-radius: 8px;
  border-width: 1px;
  box-shadow: 0 8px 20px rgba(25, 84, 146, 0.05);
}

.alert-success {
  border-color: #b7e2cb;
  background: #effaf4;
  color: #14532d;
}

.alert-info {
  border-color: #b8dcff;
  background: #edf7ff;
  color: #164e83;
}

.alert-danger {
  border-color: #f2b8b5;
  background: #fff1f1;
  color: var(--da-danger);
}

.table {
  overflow: hidden;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}

.table > :not(caption) > * > * {
  padding: 0.9rem 1rem;
  border-bottom-color: var(--da-border);
}

.table thead th {
  border-bottom: 1px solid var(--da-border-strong);
  background: var(--da-surface-soft);
  color: var(--da-muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
  --bs-table-bg-type: #fbfdff;
}

.table tbody tr:hover > * {
  background: #f2f8ff;
}

.form-label {
  margin-bottom: 0.35rem;
  color: var(--da-muted);
  font-size: 0.86rem;
  font-weight: 650;
}

.form-control,
.form-select {
  border-color: var(--da-border-strong);
  border-radius: 8px;
  color: var(--da-text);
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  border-color: var(--da-primary);
  box-shadow: 0 0 0 0.2rem rgba(22, 119, 210, 0.14);
}

.form-check-input:checked {
  border-color: var(--da-primary);
  background-color: var(--da-primary);
}

.btn {
  border-radius: 8px;
  font-weight: 650;
}

.btn-primary {
  border-color: var(--da-primary);
  background: var(--da-primary);
  box-shadow: 0 8px 18px rgba(22, 119, 210, 0.16);
}

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

.btn-outline-primary {
  border-color: var(--da-primary);
  color: var(--da-primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  border-color: var(--da-primary);
  background: var(--da-primary);
  color: #fff;
}

.btn-outline-secondary {
  border-color: var(--da-border-strong);
  color: var(--da-muted);
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
  border-color: var(--da-primary-dark);
  background: var(--da-primary-soft);
  color: var(--da-primary-dark);
}

.btn-outline-warning {
  border-color: #e4b65f;
  color: var(--da-warning);
}

.btn-outline-warning:hover,
.btn-outline-warning:focus {
  border-color: #d89922;
  background: #fff7e6;
  color: #8a5a0a;
}

.btn-outline-danger {
  border-color: #f1aaa5;
  color: var(--da-danger);
}

.btn-outline-danger:hover,
.btn-outline-danger:focus {
  border-color: var(--da-danger);
  background: #fff1f1;
  color: var(--da-danger);
}

code,
.font-monospace,
pre {
  color: #17466f;
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

code {
  padding: 0.12rem 0.35rem;
  border: 1px solid #d9eafa;
  border-radius: 6px;
  background: #f0f7ff;
}

pre {
  padding: 0.75rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface-soft);
}

dl.row {
  margin-bottom: 0;
  padding: 1rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}

dl.row dt {
  color: var(--da-muted);
  font-size: 0.84rem;
  font-weight: 700;
}

dl.row dd {
  color: var(--da-text);
}

form:not(.d-inline) > .row,
form > .row.g-3,
form > h2 + .row {
  padding: 1rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}


.admin-filter > .row {
  margin: 0;
}

.empty-state {
  padding: 1.25rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
  color: var(--da-muted);
}

.status-pill {
  display: inline-flex;
  min-width: 68px;
  align-items: center;
  justify-content: center;
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--da-border-strong);
  border-radius: 999px;
  background: var(--da-primary-soft);
  color: var(--da-primary-dark);
  font-size: 0.78rem;
  font-weight: 750;
}

.status-pill-open {
  border-color: #a9dcbd;
  background: #edf9f1;
  color: #146c43;
}

.status-pill-closed {
  border-color: #cbd5e1;
  background: #f1f5f9;
  color: #475569;
}

.conversation-token {
  max-width: 12rem;
  color: var(--da-text);
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem;
}

.conversation-preview {
  max-width: 24rem;
  white-space: normal;
}

.conversation-thread {
  display: grid;
  gap: 0.85rem;
}

.message-row {
  padding: 1rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}

.message-row-user {
  border-left: 4px solid var(--da-primary);
}

.message-row-assistant {
  border-left: 4px solid #38a3a5;
}

.message-row-system {
  border-left: 4px solid #94a3b8;
}

.message-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
  color: var(--da-muted);
  font-size: 0.82rem;
}

.message-role {
  color: var(--da-text);
  font-weight: 750;
}

.message-content {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--da-text);
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: none;
}

.source-url {
  max-width: 28rem;
  word-break: break-word;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-card {
  padding: 1rem;
  border: 1px solid var(--da-border);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}

.metric-card span {
  display: block;
  color: var(--da-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.metric-card strong {
  display: block;
  margin-top: 0.25rem;
  color: var(--da-text);
  font-size: 1.65rem;
  line-height: 1;
}

.knowledge-chunk-list {
  display: grid;
  gap: 0.85rem;
}

.knowledge-chunk {
  padding: 1rem;
  border: 1px solid var(--da-border);
  border-left: 4px solid var(--da-primary);
  border-radius: 8px;
  background: var(--da-surface);
  box-shadow: var(--da-shadow);
}
.validation-summary-errors,
.field-validation-error {
  color: var(--da-danger) !important;
}

@media (max-width: 767.98px) {
  .app-main {
    padding-top: 1rem;
  }

  h1 {
    font-size: 1.45rem;
  }

  .d-flex.align-items-center.justify-content-between {
    align-items: flex-start !important;
    flex-direction: column;
    gap: 0.75rem;
  }

  .table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}