:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --ink: #172033;
  --muted: #667085;
  --line: #dde5ef;
  --brand: #1455d9;
  --brand-dark: #0e3fa1;
  --accent: #16a085;
  --shadow: 0 20px 50px rgba(22, 32, 51, 0.1);
  --header-bg: rgba(255, 255, 255, 0.94);
  --chat-bg: linear-gradient(180deg, #fbfdff, #f4f7fb);
  --bubble-bg: #ffffff;
  --user-bubble: #1455d9;
}

body[data-theme="dark"] {
  --bg: #0f1724;
  --panel: #161f2e;
  --panel-soft: #1d293b;
  --ink: #edf2f7;
  --muted: #a7b2c4;
  --line: #2d3a4e;
  --brand: #5b8cff;
  --brand-dark: #93b4ff;
  --accent: #27c6a7;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
  --header-bg: rgba(22, 31, 46, 0.96);
  --chat-bg: linear-gradient(180deg, #111a28, #0f1724);
  --bubble-bg: #1b2637;
  --user-bubble: #285bd8;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

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

body.is-resizing {
  user-select: none;
  cursor: row-resize;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.app-header,
.app-footer {
  background: var(--header-bg);
  border-color: var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-header {
  min-height: 72px;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
}

.header-actions form {
  margin: 0;
}

.view-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.view-option {
  width: 34px;
  height: 32px;
  border: 0;
  border-radius: 7px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.view-option.active {
  color: #fff;
  background: var(--brand);
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  font-weight: 800;
  font-size: 1.3rem;
}

.brand-copy {
  display: grid;
  line-height: 1.1;
}

.brand-copy small,
.user-chip,
.section-title,
.session-item small,
.artifact-header p,
.meta,
.chat-toolbar p,
.empty-state {
  color: var(--muted);
}

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
}

.user-icon {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--panel);
  color: var(--brand);
}

.nav-pill {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink);
  background: var(--panel);
  font-weight: 800;
  text-decoration: none;
}

.app-main {
  min-height: 0;
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
}

.sidebar,
.chat-panel {
  min-height: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.sidebar,
.artifact-panel {
  border-radius: 8px;
  padding: 1rem;
  overflow: auto;
}

.sidebar {
  --sessions-height: 240px;
  display: grid;
  grid-template-rows: auto var(--sessions-height) 10px minmax(150px, 1fr);
  gap: 0.75rem;
  overflow: hidden;
}

.sidebar-section + .sidebar-section {
  margin-top: 0;
}

.section-title {
  margin-bottom: 0.65rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-row,
.artifact-header,
.chat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.session-list,
.artifact-list {
  display: grid;
  gap: 0.6rem;
}

.session-list {
  align-content: start;
  align-items: start;
  grid-auto-rows: max-content;
  gap: 0.14rem;
}

.session-item,
.icon-btn,
.send-btn {
  border: 0;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.session-item {
  width: 100%;
  text-align: left;
  border-radius: 6px;
  border: 0;
  background: transparent;
  color: var(--ink);
}

.engine-select {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 0.75rem;
  color: var(--ink);
  background: var(--panel-soft);
}

.text-input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 0.75rem;
  color: var(--ink);
  background: var(--panel-soft);
}

.session-item.active {
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 10%, transparent);
}

.session-item {
  min-height: 0;
  padding: 0.16rem 0.35rem;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.15;
  font-size: 0.9rem;
}

.session-item span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item:hover {
  background: color-mix(in srgb, var(--brand) 7%, transparent);
}

.icon-btn,
.danger-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
}

label.icon-btn {
  margin: 0;
}

.danger-btn {
  color: #d92d20;
}

.sessions-section,
.artifact-panel {
  min-height: 0;
  overflow: hidden;
}

.sessions-section {
  display: grid;
  grid-template-rows: auto 1fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem;
  background: var(--panel-soft);
}

.session-list,
.artifact-list {
  min-height: 0;
  overflow: auto;
}

.sidebar-resizer {
  height: 10px;
  border-radius: 999px;
  cursor: row-resize;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  position: relative;
}

.sidebar-resizer::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 46px;
  height: 4px;
  border-radius: 999px;
  background: var(--muted);
  transform: translate(-50%, -50%);
  opacity: 0.55;
}

.sidebar-resizer:hover::after,
.sidebar-resizer:focus-visible::after {
  background: var(--brand);
  opacity: 1;
}

.chat-panel {
  border-radius: 8px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

.chat-toolbar {
  min-height: 78px;
  padding: 1rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.chat-toolbar h1,
.artifact-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.chat-toolbar p,
.artifact-header p {
  margin: 0.2rem 0 0;
  font-size: 0.9rem;
}

.chat-scroll {
  min-height: 0;
  overflow: auto;
  padding: 1rem;
  background: var(--chat-bg);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  max-width: min(780px, 92%);
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.avatar {
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--brand);
}

.message.user .avatar {
  background: var(--accent);
}

.bubble {
  padding: 0.85rem 0.95rem;
  border-radius: 8px;
  background: var(--bubble-bg);
  border: 1px solid var(--line);
  box-shadow: 0 10px 22px rgba(22, 32, 51, 0.07);
}

.message.user .bubble {
  color: #fff;
  background: var(--user-bubble);
  border-color: var(--user-bubble);
}

.message.user .meta {
  color: rgba(255, 255, 255, 0.78);
}

.bubble p {
  margin: 0.35rem 0 0;
  white-space: pre-wrap;
}

.meta {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
}

.prompt-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  padding: 1rem;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.prompt-box textarea {
  resize: none;
  border-radius: 8px;
  border-color: var(--line);
  background: var(--panel-soft);
  color: var(--ink);
}

.prompt-box textarea::placeholder {
  color: var(--muted);
}

.send-btn {
  width: 48px;
  min-height: 48px;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
}

.send-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.modal-backdrop-custom {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(15, 23, 36, 0.44);
}

.modal-backdrop-custom[hidden] {
  display: none;
}

.session-modal {
  width: min(440px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.modal-header-custom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.modal-header-custom h2 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-header-custom p {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.field-label {
  display: block;
  margin: 0.75rem 0 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  margin-top: 1rem;
}

.text-btn,
.primary-btn {
  min-height: 38px;
  border-radius: 8px;
  padding: 0 0.85rem;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
}

.text-btn {
  color: var(--ink);
  background: var(--panel);
}

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

.artifact-panel {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0.75rem;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  box-shadow: none;
}

.artifact-header {
  align-items: flex-start;
}

.artifact-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.artifact-count {
  min-width: 30px;
  height: 30px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--brand);
  font-weight: 800;
}

.artifact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.65rem;
  background: var(--panel);
}

.artifact-card strong {
  display: block;
}

.artifact-card small {
  color: var(--muted);
}

.artifact-card p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.empty-state {
  min-height: 180px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0.5rem;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.empty-state i {
  font-size: 2rem;
  color: var(--brand);
}

.app-footer {
  min-height: 48px;
  padding: 0.65rem 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

.app-footer a {
  color: var(--brand-dark);
  font-weight: 700;
  text-decoration: none;
}

.admin-shell {
  min-width: 0;
}

.admin-main {
  min-height: 0;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
}

.admin-tabs,
.admin-content,
.table-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.admin-tabs {
  min-height: 0;
  align-content: start;
  display: grid;
  gap: 0.35rem;
  padding: 0.75rem;
}

.admin-tab {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  padding: 0 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  background: transparent;
  font-weight: 800;
  cursor: pointer;
}

.admin-tab:hover,
.admin-tab.active {
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 10%, transparent);
}

.admin-content {
  min-width: 0;
  min-height: 0;
  padding: 1rem;
  overflow: auto;
}

.admin-topline,
.table-toolbar,
.compliance-card-head,
.setting-row,
.limit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.admin-topline {
  margin-bottom: 1rem;
}

.admin-topline h1 {
  margin: 0;
  font-size: 1.35rem;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.status-pill,
.subtle-count {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  background: var(--panel-soft);
  font-weight: 800;
  white-space: nowrap;
}

.admin-panel {
  display: none;
}

.admin-panel.active {
  display: grid;
  gap: 1rem;
}

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

.setting-row,
.field-card {
  min-height: 88px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.85rem;
  background: var(--panel-soft);
}

.setting-row small,
.field-card span,
.compliance-card p,
.compliance-card li,
.limit-row span,
.limit-row small {
  color: var(--muted);
}

.setting-row strong,
.setting-row small {
  display: block;
}

.field-card {
  display: grid;
  align-content: start;
  gap: 0.45rem;
}

.field-card span {
  font-size: 0.82rem;
  font-weight: 800;
}

.table-panel {
  padding: 1rem;
  box-shadow: none;
}

.table-toolbar {
  margin-bottom: 0.85rem;
}

.table-toolbar h2 {
  margin: 0;
  font-size: 1.05rem;
}

.pattern-list,
.compliance-grid,
.limit-bars {
  display: grid;
  gap: 0.65rem;
}

.pattern-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--panel-soft);
}

.pattern-row strong,
.pattern-row small {
  display: block;
}

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

.compliance-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.9rem;
  background: var(--panel-soft);
}

.compliance-card h3 {
  margin: 0;
  font-size: 1rem;
}

.compliance-card p {
  margin: 0.25rem 0 0;
}

.compliance-card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

.responsive-table {
  min-width: 0;
  overflow: auto;
}

.responsive-table table {
  width: 100%;
  border-collapse: collapse;
}

.responsive-table th,
.responsive-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.7rem 0.55rem;
  color: var(--ink);
  vertical-align: middle;
}

.responsive-table th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.row-actions {
  width: 96px;
  white-space: nowrap;
}

.row-actions .icon-btn {
  min-width: 34px;
  width: 34px;
  height: 34px;
}

.limit-row {
  display: grid;
  grid-template-columns: minmax(150px, 220px) 1fr 56px;
}

.limit-row > div:first-child {
  display: grid;
}

.limit-track {
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.limit-track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.admin-form .multi-select {
  min-height: 112px;
  padding-top: 0.5rem;
}

.compact-check {
  min-height: 72px;
  margin-top: 0.85rem;
}

.access-badge {
  min-height: 28px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  color: var(--muted);
  background: var(--panel-soft);
  font-size: 0.78rem;
  font-weight: 800;
}

.access-badge.admin {
  color: #fff;
  border-color: var(--brand);
  background: var(--brand);
}

.reset-required {
  display: inline-block;
  margin-left: 0.35rem;
  color: #d97706;
  font-weight: 800;
}

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: var(--chat-bg);
}

.auth-panel {
  width: min(460px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  display: grid;
  gap: 0.85rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-panel .brand {
  justify-self: center;
  margin-bottom: 0.2rem;
}

.auth-fields {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  background: var(--panel-soft);
}

.auth-fields .field-label:first-child {
  margin-top: 0;
}

.auth-fields .text-input {
  background: var(--panel);
}

.auth-alert {
  border: 1px solid color-mix(in srgb, #d92d20 40%, var(--line));
  border-radius: 8px;
  padding: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #d92d20;
  background: color-mix(in srgb, #d92d20 10%, transparent);
  font-weight: 700;
}

.auth-submit {
  width: 100%;
  justify-content: center;
}

.auth-footer {
  margin-top: 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

.divider {
  color: #a0aabc;
  padding: 0 0.45rem;
}

@media (max-width: 1180px) {
  .app-main {
    grid-template-columns: 280px minmax(0, 1fr);
  }
}

@media (max-width: 760px) {
  .app-header,
  .app-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .app-main {
    grid-template-columns: 1fr;
    padding: 0.75rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .admin-main {
    grid-template-columns: 1fr;
    padding: 0.75rem;
  }

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

  .settings-grid,
  .compliance-grid {
    grid-template-columns: 1fr;
  }

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

  .limit-row {
    grid-template-columns: 1fr;
  }

  .sidebar {
    max-height: none;
    min-height: 560px;
  }

  .chat-panel {
    min-height: 62vh;
  }

  .message {
    max-width: 100%;
  }

  .prompt-box {
    grid-template-columns: 1fr;
  }

  .send-btn {
    width: 100%;
  }

}