:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-hover: #222238;
  --border: #2a2a3e;
  --border-light: #3a3a5e;
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #686880;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-dark: #4834d4;
  --success: #00b894;
  --warning: #fdcb6e;
  --danger: #ff6b6b;
  --info: #74b9ff;
  --terminal-bg: #0d1117;
  --terminal-text: #c9d1d9;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
}

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

html, body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

.screen { display: none; height: 100vh; }
.screen.active { display: flex; }

/* Login */
#login-screen {
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #0f0f1e 50%, var(--bg-primary) 100%);
}

.login-container {
  width: 400px;
  max-width: 90vw;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.login-header { text-align: center; margin-bottom: 32px; }
.logo { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 8px; }
.logo-icon { font-size: 32px; color: var(--accent); }
.logo h1 { font-size: 28px; font-weight: 700; }
.accent { color: var(--accent); }
.tagline { color: var(--text-secondary); font-size: 14px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-row input, .form-row select {
  width: 100%;
  padding: 10px 14px;
  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);
  transition: border-color 0.2s;
}
.form-group input:focus, .form-row input:focus {
  outline: none;
  border-color: var(--accent);
}

.error-text { color: var(--danger); font-size: 13px; margin-top: 12px; text-align: center; min-height: 20px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-ghost { background: transparent; color: var(--text-secondary); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; }

/* App Layout */
#app-screen { flex-direction: column; }

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 52px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-left { display: flex; align-items: center; gap: 8px; }
.logo-icon-sm { color: var(--accent); font-size: 20px; }
.app-title { font-size: 16px; font-weight: 700; }

.header-center { display: flex; align-items: center; }
.model-selector { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.model-selector label { color: var(--text-secondary); }
.model-selector select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  max-width: 250px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 6px var(--danger); }

.header-right { display: flex; align-items: center; gap: 10px; }
.user-name { font-size: 13px; color: var(--text-secondary); }

.app-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-section {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.task-list {
  flex: 1;
  overflow-y: auto;
  margin-top: 12px;
}

.task-item {
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-bottom: 4px;
  border: 1px solid transparent;
  transition: all 0.15s;
}
.task-item:hover { background: var(--bg-hover); }
.task-item.active { background: var(--bg-tertiary); border-color: var(--accent); }
.task-item .task-title { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.task-item .task-meta { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.task-item .task-status {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
}
.task-item .task-status.running { background: rgba(116,185,255,0.15); color: var(--info); }
.task-item .task-status.completed { background: rgba(0,184,148,0.15); color: var(--success); }
.task-item .task-status.failed { background: rgba(255,107,107,0.15); color: var(--danger); }
.task-item .task-status.pending { background: rgba(253,203,110,0.15); color: var(--warning); }
.task-item .task-status.stopped { background: rgba(152,152,176,0.15); color: var(--text-muted); }
.task-item .task-status.timeout { background: rgba(253,203,110,0.15); color: var(--warning); }
.task-item .task-time { font-size: 11px; color: var(--text-muted); }

/* Main Panel */
.main-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-tabs {
  display: flex;
  gap: 0;
  padding: 0 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.tab {
  padding: 10px 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all 0.2s;
}
.tab:hover { color: var(--text-secondary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-content { display: none; flex: 1; overflow: hidden; flex-direction: column; }
.tab-content.active { display: flex; }

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

.welcome-message {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.welcome-message h2 { font-size: 24px; color: var(--text-primary); margin-bottom: 8px; }
.welcome-message p { margin-bottom: 20px; }
.examples { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-top: 16px; }
.example-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-sans);
  transition: all 0.2s;
  width: 340px;
  max-width: 100%;
}
.example-btn:hover { border-color: var(--accent); color: var(--text-primary); }

.chat-msg {
  display: flex;
  gap: 12px;
  max-width: 85%;
  animation: fadeIn 0.2s;
}
.chat-msg.user { align-self: flex-end; flex-direction: row-reverse; }
.chat-msg.assistant { align-self: flex-start; }
.chat-msg.system { align-self: center; max-width: 95%; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}
.chat-msg.user .msg-avatar { background: var(--accent); color: #fff; }
.chat-msg.assistant .msg-avatar { background: var(--bg-tertiary); border: 1px solid var(--accent); color: var(--accent); }
.chat-msg.system .msg-avatar { display: none; }

.msg-body {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.6;
}
.chat-msg.user .msg-body { background: var(--accent); border-color: var(--accent); color: #fff; }
.chat-msg.system .msg-body {
  background: var(--bg-tertiary);
  border-color: var(--border-light);
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
  padding: 8px 16px;
  width: 100%;
}

.msg-body pre {
  background: var(--terminal-bg);
  border-radius: var(--radius-sm);
  padding: 10px;
  margin: 8px 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  border: 1px solid var(--border);
}
.msg-body code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(0,0,0,0.3);
  padding: 2px 5px;
  border-radius: 3px;
}

.chat-input-area {
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-shrink: 0;
}

#chat-input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  resize: none;
  min-height: 42px;
  max-height: 120px;
}
#chat-input:focus { outline: none; border-color: var(--accent); }
#chat-input::placeholder { color: var(--text-muted); }

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

/* Progress Panel */
.progress-panel { padding: 20px; flex: 1; overflow-y: auto; }
.progress-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.progress-header h3 { font-size: 16px; }
.badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 600;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.badge.running { background: rgba(116,185,255,0.15); color: var(--info); border-color: rgba(116,185,255,0.3); }
.badge.completed { background: rgba(0,184,148,0.15); color: var(--success); border-color: rgba(0,184,148,0.3); }
.badge.failed { background: rgba(255,107,107,0.15); color: var(--danger); border-color: rgba(255,107,107,0.3); }

.progress-steps { display: flex; flex-direction: column; gap: 8px; }

.step-item {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  align-items: flex-start;
  animation: fadeIn 0.3s;
}
.step-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  font-weight: 700;
}
.step-icon.thinking { background: rgba(116,185,255,0.15); color: var(--info); }
.step-icon.tool { background: rgba(162,155,254,0.15); color: var(--accent-light); }
.step-icon.done { background: rgba(0,184,148,0.15); color: var(--success); }
.step-icon.error { background: rgba(255,107,107,0.15); color: var(--danger); }

.step-content { flex: 1; min-width: 0; }
.step-title { font-size: 13px; font-weight: 500; margin-bottom: 2px; }
.step-detail { font-size: 12px; color: var(--text-secondary); word-break: break-word; }
.step-time { font-size: 11px; color: var(--text-muted); flex-shrink: 0; }

.empty-state { color: var(--text-muted); text-align: center; padding: 40px; font-size: 14px; }

/* Terminal */
.terminal-panel { display: flex; flex-direction: column; flex: 1; overflow: hidden; }
.terminal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.terminal-title { font-family: var(--font-mono); font-size: 12px; color: var(--text-secondary); }

.terminal-output {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background: var(--terminal-bg);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}

.terminal-line { padding: 2px 0; word-break: break-all; }
.terminal-line.command { color: var(--success); }
.terminal-line.command::before { content: '$ '; color: var(--accent); }
.terminal-line.stdout { color: var(--terminal-text); }
.terminal-line.stderr { color: var(--danger); }
.terminal-line.system { color: var(--text-muted); font-style: italic; }
.terminal-line.exit-success { color: var(--success); }
.terminal-line.exit-fail { color: var(--danger); }

/* Logs */
.logs-panel { display: flex; flex-direction: column; flex: 1; overflow: hidden; padding: 20px; }
.logs-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-shrink: 0; }
.logs-header h3 { font-size: 16px; }
.logs-actions { display: flex; gap: 8px; align-items: center; }
.logs-actions select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
}

.logs-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }

.log-item {
  display: flex;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  align-items: flex-start;
}
.log-level {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  flex-shrink: 0;
}
.log-level.info { background: rgba(116,185,255,0.15); color: var(--info); }
.log-level.warn { background: rgba(253,203,110,0.15); color: var(--warning); }
.log-level.error { background: rgba(255,107,107,0.15); color: var(--danger); }
.log-message { flex: 1; color: var(--text-secondary); word-break: break-word; }
.log-time { color: var(--text-muted); font-size: 11px; flex-shrink: 0; font-family: var(--font-mono); }

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 560px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}
.modal-body { padding: 20px; }
.modal-body h4 { font-size: 14px; margin-bottom: 12px; color: var(--text-secondary); }
.modal-body hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.form-row { display: flex; gap: 8px; margin-bottom: 8px; }
.form-row input, .form-row select { flex: 1; }
.create-user-form { margin-bottom: 16px; }

.users-list { display: flex; flex-direction: column; gap: 8px; }
.user-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
}
.user-info { flex: 1; }
.user-info .name { font-size: 13px; font-weight: 500; }
.user-info .email { font-size: 12px; color: var(--text-muted); }
.user-role { font-size: 11px; padding: 2px 8px; border-radius: 10px; font-weight: 600; margin-right: 8px; }
.user-role.admin { background: rgba(162,155,254,0.15); color: var(--accent-light); }
.user-role.user { background: rgba(152,152,176,0.1); color: var(--text-muted); }

.delete-user-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--danger);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  cursor: pointer;
}
.delete-user-btn:hover { background: rgba(255,107,107,0.1); }

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

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .header-center { display: none; }
  .chat-msg { max-width: 95%; }
}

/* Typing animation */
.typing-dots::after {
  content: '';
  animation: typing 1.4s infinite;
}
@keyframes typing {
  0%, 20% { content: '.'; }
  40% { content: '..'; }
  60%, 100% { content: '...'; }
}