:root {
  --bg-dark: #0a0e17;
  --bg-card: #121826;
  --bg-input: #1a2234;
  --border-color: #232f48;
  --border-focus: #3b82f6;
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-glow: rgba(59, 130, 246, 0.25);
  --primary-hover: #2563eb;
  --secondary: #8b5cf6;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-red: #ef4444;
  --code-bg: #070a10;
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
}

.app-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Top Navigation */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-badge {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  box-shadow: 0 0 15px var(--primary-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.cluster-status-bar {
  display: flex;
  gap: 0.75rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.8rem;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot.green { background-color: var(--accent-green); box-shadow: 0 0 8px var(--accent-green); }
.dot.yellow { background-color: var(--accent-yellow); box-shadow: 0 0 8px var(--accent-yellow); }
.dot.red { background-color: var(--accent-red); }

.nav-user-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-secondary {
  background-color: var(--primary);
  color: white;
}
.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}
.btn-outline:hover {
  background-color: var(--bg-input);
  color: var(--text-main);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

/* Main Content & Sidebar */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sidebar {
  width: 260px;
  background-color: var(--bg-card);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem;
}

.nav-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.tab-btn:hover {
  background-color: var(--bg-input);
  color: var(--text-main);
}

.tab-btn.active {
  background: linear-gradient(90deg, rgba(59,130,246,0.15), transparent);
  color: var(--primary);
  border-left: 3px solid var(--primary);
  font-weight: 600;
}

.sidebar-footer .system-card {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 0.75rem;
}

.system-card h4 {
  margin-bottom: 0.4rem;
  color: var(--primary);
  font-size: 0.8rem;
}

.system-card code {
  font-family: var(--font-mono);
  color: #38bdf8;
}

/* View Panels */
.view-panel {
  display: none;
  flex: 1;
  overflow-y: auto;
  background-color: var(--bg-dark);
}

.view-panel.active {
  display: flex;
  flex-direction: column;
}

/* Chat View */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(18, 24, 38, 0.6);
  backdrop-filter: blur(10px);
}

.chat-title h2 {
  font-size: 1.3rem;
  font-weight: 600;
}

.chat-title p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.quick-prompts {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.quick-title {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.pill-action {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.25rem 0.65rem;
  border-radius: 14px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.pill-action:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

.messages-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.message-card {
  max-width: 85%;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem 1.25rem;
}

.message-card.user {
  align-self: flex-end;
  background-color: #1e293b;
  border-color: #334155;
}

.message-card.assistant {
  align-self: flex-start;
  border-left: 3px solid var(--primary);
}

.message-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.message-body {
  font-size: 0.92rem;
  line-height: 1.6;
}

.message-body pre {
  background-color: var(--code-bg);
  padding: 0.75rem;
  border-radius: 6px;
  margin: 0.5rem 0;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
}

.thought-box {
  background-color: rgba(59, 130, 246, 0.05);
  border: 1px dashed var(--primary);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: #93c5fd;
}

.chat-input-area {
  padding: 1rem 2rem;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.chat-input-form {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

.chat-input-form textarea {
  flex: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-main);
  padding: 0.75rem 1rem;
  font-family: var(--font-main);
  font-size: 0.9rem;
  resize: none;
}

.chat-input-form textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* MCP Studio */
.panel-inner {
  padding: 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel-header h2 { font-size: 1.3rem; }
.panel-header p { color: var(--text-muted); font-size: 0.85rem; }

.mcp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.tools-card-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.tool-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  cursor: pointer;
  transition: all 0.2s;
}

.tool-card:hover, .tool-card.selected {
  border-color: var(--primary);
  background-color: var(--bg-input);
}

.tool-card h4 {
  font-family: var(--font-mono);
  color: var(--primary);
  font-size: 0.9rem;
}

.tool-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.exec-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.75rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-group input, .form-group textarea {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  padding: 0.5rem 0.75rem;
}

.code-font {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.exec-output pre {
  background-color: var(--code-bg);
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  max-height: 200px;
  overflow: auto;
}

/* Kafka Stream Table */
.kafka-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.filter-group select {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
}

.kafka-table-wrap {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.kafka-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.kafka-table th, .kafka-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.kafka-table th {
  background-color: var(--bg-input);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
}

.kafka-table td code {
  font-family: var(--font-mono);
  color: #38bdf8;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 90%;
  max-width: 480px;
  padding: 1.5rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

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

.modal-header h3 {
  font-size: 1.1rem;
  color: var(--text-main);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}