:root {
  --bg-primary: #1a1b1e;
  --bg-secondary: #25262b;
  --bg-tertiary: #2c2e33;
  --bg-hover: #373a40;
  --border: #373a40;
  --text-primary: #c1c2c5;
  --text-secondary: #909296;
  --text-muted: #5c5f66;
  --accent: #4c9aff;
  --accent-hover: #3b8af0;
  --success: #51cf66;
  --danger: #ff6b6b;
  --warning: #fcc419;
  --info: #339af0;
  --radius: 8px;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --sidebar-width: 200px;
  --topbar-height: 48px;
  --statusbar-height: 28px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  display: flex;
  min-height: 100vh;
}

body.dark {
  color-scheme: dark;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { color: var(--accent-hover); }

.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
}

.sidebar-brand {
  padding: 14px 16px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}

.sidebar-links {
  flex: 1;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.nav-item.active {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-left: 3px solid var(--accent);
}

.nav-icon { font-size: 16px; }
.nav-label { font-weight: 500; }

.main-area {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  height: var(--topbar-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.page-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.topbar-actions {
  display: flex;
  gap: 8px;
}

main {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}

.status-bar {
  height: var(--statusbar-height);
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  font-size: 12px;
  color: var(--text-muted);
}

.input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
}
.input:focus {
  outline: none;
  border-color: var(--accent);
}
.input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn {
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--accent-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.tab {
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  border: none;
  background: none;
  transition: color 0.15s, background 0.15s;
}
.tab:hover { color: var(--text-primary); }
.tab.active {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.page-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  gap: 8px;
}
.page-placeholder h2 {
  color: var(--text-primary);
  font-weight: 600;
}

.metric-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metric-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.metric-card .metric-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.metric-card .metric-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}
.metric-card .metric-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.chat-layout {
  display: flex;
  height: calc(100vh - var(--topbar-height) - var(--statusbar-height) - 40px);
  margin: -20px;
}

.session-list {
  width: 260px;
  min-width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.session-search {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.sessions {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
}

.session-item {
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.session-item:hover { background: var(--bg-hover); }
.session-item.active { background: var(--bg-hover); }

.session-title {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 500;
}
.session-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.chat-messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  max-width: 70%;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.6;
}

.message-sender {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
}

.message-body p {
  margin-bottom: 8px;
}
.message-body p:last-child { margin-bottom: 0; }

.message-body code {
  background: var(--bg-tertiary);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.message-body pre {
  background: var(--bg-tertiary);
  padding: 12px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
}

.message.assistant {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  align-self: flex-start;
  max-width: 100%;
}

.chat-input {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-input textarea {
  resize: none;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.table th {
  text-align: left;
  padding: 8px 12px;
  color: var(--text-secondary);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}
.table tr:hover td {
  background: var(--bg-hover);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.model-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.model-card .model-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
}
.model-card .model-provider {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.model-card .model-caps {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}
.model-card .cap-tag {
  padding: 2px 7px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-secondary);
}
.model-card .model-meta {
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.login-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 24px;
}

.login-brand {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 1px;
}

.login-btn {
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}

.login-hint {
  font-size: 13px;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .sidebar {
    width: 56px;
    min-width: 56px;
  }
  .sidebar-brand {
    padding: 14px 12px;
    font-size: 0;
  }
  .sidebar-brand::after {
    content: '⬛';
    font-size: 16px;
  }
  .nav-label { display: none; }
  .main-area { margin-left: 56px; }
  .chat-layout { flex-direction: column; }
  .session-list { width: 100%; min-width: 100%; max-height: 200px; }
}

.ds-tabs {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--topbar-height) - var(--statusbar-height) - 40px);
  margin: -20px;
}

.tab-header {
  display: flex;
  gap: 4px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.tab-btn {
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  border: none;
  background: none;
  transition: color 0.15s, background 0.15s;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tab-panel {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
}
.tab-panel:not(.active) { display: none; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.metric-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
}

.metric-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
  display: block;
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.activity-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.activity-row:last-child { border-bottom: none; }

.activity-time {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  min-width: 40px;
}

.activity-role {
  font-size: 11px;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.activity-role.assistant { background: #1a3a5c; color: var(--accent); }
.activity-role.user { background: #2a3a1a; color: var(--success); }
.activity-role.system { background: var(--bg-tertiary); color: var(--text-muted); }

.activity-text {
  font-size: 13px;
  color: var(--text-secondary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pct-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.pct-fill {
  height: 6px;
  background: var(--accent);
  border-radius: 3px;
  min-width: 2px;
}

.fact-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 8px;
}

.fact-key {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.fact-value {
  font-size: 14px;
  color: var(--text-primary);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.history-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border-radius: var(--radius);
  color: var(--text-primary);
  text-decoration: none;
  transition: background 0.15s;
}
.history-item:hover { background: var(--bg-hover); }

.history-title {
  font-size: 14px;
  font-weight: 500;
}

.history-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

.approval-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.approval-card {
  background: var(--bg-secondary);
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.approval-warning {
  font-size: 13px;
  font-weight: 600;
  color: var(--warning);
  margin-bottom: 8px;
}

.approval-detail {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.approval-detail code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-primary);
  background: var(--bg-tertiary);
  padding: 1px 5px;
  border-radius: 3px;
}

.approval-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.approval-time {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
}

.btn-success { background: var(--success); }
.btn-success:hover { background: #40b358; }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #e55; }
.btn-sm { padding: 4px 12px; font-size: 12px; }

.role-badge {
  font-size: 11px;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.role-badge.admin { background: #5c1a1a; color: var(--danger); }
.role-badge.user { background: var(--bg-tertiary); color: var(--text-secondary); }

.code-status {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}
.code-status.Active { background: #1a3a1a; color: var(--success); }
.code-status.Expired { background: var(--bg-tertiary); color: var(--text-muted); }

.model-card-header {
  margin-bottom: 8px;
}

.model-card-header .model-name {
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  display: block;
}

.model-card-header .model-provider {
  font-size: 12px;
  color: var(--text-muted);
}

.session-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.session-list-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fact-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.setting-value {
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 0.15s;
}
.setting-value:hover {
  background: var(--bg-hover);
}

#new-fact-form label {
  font-size: 12px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 4px;
}

.rule-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}
.rule-badge.allow { background: #1a3a1a; color: var(--success); }
.rule-badge.require { background: #3a3a1a; color: var(--warning); }
.rule-badge.deny { background: #5c1a1a; color: var(--danger); }

.activity-layout {
  height: calc(100vh - var(--topbar-height) - var(--statusbar-height) - 40px);
  margin: -20px;
  display: flex;
  flex-direction: column;
}

.activity-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.activity-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.activity-tabs {
  display: flex;
  gap: 4px;
}

.activity-feed {
  flex: 1;
  overflow-y: auto;
  padding: 12px 20px;
}

.activity-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  animation: slideIn 0.3s ease;
}
.activity-item:first-child { padding-top: 0; }

.activity-icon {
  font-size: 16px;
  min-width: 24px;
  text-align: center;
}

.activity-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.activity-line {
  font-size: 13px;
  color: var(--text-primary);
}

.activity-meta {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.usage-table {
  margin-bottom: 24px;
}