/* ==========================================
   Workbench — Base Styles
   Architecture: utility classes, layout, components
   ========================================== */

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

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
  --radius: 8px;
  --radius-sm: 4px;
  --header-height: 52px;
  --sidebar-width: 240px;
  --transition: 0.2s ease;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 16px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-right: 24px;
  flex-shrink: 0;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.3px;
}

.version {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.header-tabs {
  display: flex;
  gap: 2px;
  flex: 1;
  overflow-x: auto;
}

.tab-btn {
  padding: 6px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tab-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.tab-btn.active { background: var(--accent-bg); color: var(--accent); }
.tab-btn svg { flex-shrink: 0; }

.header-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.btn-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.btn-icon:hover { background: var(--bg-hover); color: var(--text-primary); }

/* Main content */
.app-main {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.tab-content {
  max-width: 1200px;
  margin: 0 auto;
}

/* Welcome screen */
.welcome-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60vh;
}

.welcome-card {
  text-align: center;
  padding: 48px;
}

.welcome-card h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.welcome-card p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 400px;
}

.welcome-sub {
  margin-top: 12px;
  font-size: 13px !important;
  color: var(--text-muted) !important;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
}

.card-header {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}

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

.btn-primary:hover { opacity: 0.9; }

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover { background: var(--border-color); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover { opacity: 0.9; }

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-family);
  transition: border-color var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-bg);
}

textarea.form-input {
  min-height: 80px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 12px;
}

/* Toggle switch */
.toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.toggle input { display: none; }

.toggle-switch {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--border-color);
  position: relative;
  transition: background var(--transition);
}

.toggle input:checked + .toggle-switch {
  background: var(--accent);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform var(--transition);
}

.toggle input:checked + .toggle-switch::after {
  transform: translateX(18px);
}

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

/* Status indicators */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.active { background: var(--success); }
.status-dot.inactive { background: var(--text-muted); }
.status-dot.error { background: var(--danger); }

/* Code/pre */
pre, code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-code);
  border-radius: var(--radius-sm);
}

pre {
  padding: 16px;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

code { padding: 2px 5px; }

pre code {
  padding: 0;
  background: transparent;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
  border-left: 3px solid;
}

.alert-info { background: var(--accent-bg); border-color: var(--accent); color: var(--text-primary); }
.alert-error { background: var(--danger-bg); border-color: var(--danger); color: var(--danger); }
.alert-success { background: var(--success-bg); border-color: var(--success); color: var(--success); }

/* Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Agent list grid */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--transition);
}

.agent-card:hover { border-color: var(--accent); }

.agent-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.agent-card-name {
  font-size: 15px;
  font-weight: 600;
}

.agent-card-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.agent-card-version {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 8px;
}

.agent-settings-form {
  margin-top: 12px;
}

.settings-form-divider {
  border-top: 1px solid var(--border-color);
  margin-bottom: 10px;
}

/* Settings page */
.settings-section {
  margin-bottom: 32px;
}

.settings-section h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.settings-section p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* API key display */
.api-key-display {
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  word-break: break-all;
  position: relative;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }