/**
 * DataLab - Data Science Processing Platform
 * Modern SaaS Pastel Green Theme
 * Palette:
 *   --primary: #A8C9A8
 *   --secondary: #C8DEC9
 *   --background: #F5F8F2
 *   --card: #FFFFFF
 *   --accent: #779B7B
 *   --text-primary: #263B2B
 *   --text-secondary: #7A8A7B
 *   --border: #E1EAE0
 */

:root {
  --primary: #A8C9A8;
  --primary-dark: #8FB78F;
  --secondary: #C8DEC9;
  --background: #F5F8F2;
  --card: #FFFFFF;
  --accent: #779B7B;
  --accent-hover: #638567;
  --text-primary: #263B2B;
  --text-secondary: #7A8A7B;
  --border: #E1EAE0;
  
  --success: #529B68;
  --success-bg: #E8F5E9;
  --danger: #D35D5D;
  --danger-bg: #FDEDED;
  --warning: #D99B38;
  --warning-bg: #FFF8E7;
  --info: #4A90A4;
  --info-bg: #E7F3F7;
  
  --shadow-sm: 0 2px 6px rgba(38, 59, 43, 0.04);
  --shadow-md: 0 6px 18px rgba(38, 59, 43, 0.06);
  --shadow-lg: 0 12px 30px rgba(38, 59, 43, 0.08);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 270px;
  --navbar-height: 72px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

/* Layout Architecture */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1000;
  transition: var(--transition);
}

.sidebar-header {
  height: var(--navbar-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}

.brand-text h1 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.3px;
}

.brand-text span {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.sidebar-menu {
  flex: 1;
  padding: 20px 14px;
  overflow-y: auto;
  list-style: none;
}

.menu-category {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 12px 14px 6px;
  margin-top: 8px;
}

.menu-item {
  margin-bottom: 4px;
}

.menu-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
  transition: var(--transition);
}

.menu-link:hover {
  background-color: var(--secondary);
  color: var(--text-primary);
  transform: translateX(3px);
}

.menu-link.active {
  background-color: var(--primary);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(168, 201, 168, 0.4);
}

.menu-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.menu-link.active .menu-icon {
  color: var(--text-primary);
}

.sidebar-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border);
  background-color: #FAFCF9;
}

.user-snippet {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background-color: var(--secondary);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--border);
}

.user-meta h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.user-meta p {
  font-size: 11px;
  color: var(--text-secondary);
}

/* Main Content Area */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: var(--transition);
}

/* Top Navbar */
.navbar {
  height: var(--navbar-height);
  background-color: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 99;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-sidebar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
}

.btn-sidebar-toggle:hover {
  background-color: var(--background);
}

.page-title-box h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}

.page-title-box .breadcrumbs {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-badge-db {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.status-badge-db.connected {
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid #C8E6C9;
}

.status-badge-db.disconnected {
  background-color: var(--warning-bg);
  color: var(--warning);
  border: 1px solid #FFE0B2;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: currentColor;
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Page Container */
.content-body {
  flex: 1;
  padding: 32px;
}

/* Cards & Surfaces */
.card {
  background-color: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Stat Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--secondary);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-info h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-subtext {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  margin-top: 2px;
}

/* Stepper / Progress Pipeline */
.stepper-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  margin: 20px 0 32px;
  padding: 0 20px;
}

.stepper-progress-bar {
  position: absolute;
  top: 24px;
  left: 60px;
  right: 60px;
  height: 4px;
  background-color: var(--border);
  z-index: 1;
}

.stepper-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.4s ease;
}

.step-node {
  position: relative;
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}

.step-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--card);
  border: 3px solid var(--border);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  transition: var(--transition);
}

.step-node.active .step-circle {
  border-color: var(--accent);
  background-color: var(--primary);
  color: var(--text-primary);
  box-shadow: 0 0 0 4px var(--secondary);
}

.step-node.completed .step-circle {
  border-color: var(--accent);
  background-color: var(--accent);
  color: #FFFFFF;
}

.step-label {
  margin-top: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.step-badge {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--card);
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.table th {
  background-color: #FAFCF9;
  color: var(--text-primary);
  font-weight: 600;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  vertical-align: middle;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table tbody tr:hover {
  background-color: #F8FBF7;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.2;
}

.badge-primary   { background-color: var(--secondary); color: var(--text-primary); }
.badge-success   { background-color: var(--success-bg); color: var(--success); }
.badge-danger    { background-color: var(--danger-bg); color: var(--danger); }
.badge-warning   { background-color: var(--warning-bg); color: var(--warning); }
.badge-info      { background-color: var(--info-bg); color: var(--info); }
.badge-secondary { background-color: #ECEFEA; color: var(--text-secondary); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-primary);
  border-color: var(--primary-dark);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(168, 201, 168, 0.45);
  transform: translateY(-1px);
}

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

.btn-accent:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(119, 155, 123, 0.35);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: #FAFCF9;
  border-color: var(--border);
  color: var(--text-primary);
}

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

.btn-sm {
  padding: 6px 12px;
  font-size: 12.5px;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 7px;
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: #FAFCF9;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  background-color: var(--card);
  box-shadow: 0 0 0 3px rgba(168, 201, 168, 0.35);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

.form-help {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 5px;
}

/* Code / Terminal Box (ASCII Chart) */
.terminal-box {
  background-color: #1E2B20;
  color: #E2F2E4;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  font-size: 14px;
  line-height: 1.7;
  overflow-x: auto;
  border: 1px solid #334B36;
  position: relative;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.25);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #334B36;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background-color: #E06C75; }
.dot-yellow { background-color: #E5C07B; }
.dot-green { background-color: #98C379; }

.terminal-title {
  font-size: 12px;
  color: #8CA390;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.btn-copy-terminal {
  background: #2D3E30;
  border: 1px solid #435B47;
  color: #C8DEC9;
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  font-size: 11px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-copy-terminal:hover {
  background: var(--accent);
  color: #FFFFFF;
}

/* Alerts */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 22px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
}

.alert-success { background-color: var(--success-bg); color: var(--success); border: 1px solid #C8E6C9; }
.alert-danger  { background-color: var(--danger-bg); color: var(--danger); border: 1px solid #FFCDD2; }
.alert-warning { background-color: var(--warning-bg); color: #8A6400; border: 1px solid #FFE0B2; }
.alert-info    { background-color: var(--info-bg); color: var(--info); border: 1px solid #B2EBF2; }

/* Tabs Component */
.nav-tabs {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.nav-tab-btn {
  background: none;
  border: none;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.nav-tab-btn:hover {
  color: var(--text-primary);
}

.nav-tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Quick Action Shortcuts Grid */
.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.shortcut-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.shortcut-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.shortcut-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background-color: var(--primary);
  opacity: 0;
  transition: var(--transition);
}

.shortcut-card:hover::before {
  opacity: 1;
}

.shortcut-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}

.shortcut-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.shortcut-card p {
  font-size: 13px;
  color: var(--text-secondary);
  flex: 1;
}

.shortcut-arrow {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Footer */
.app-footer {
  background-color: var(--card);
  border-top: 1px solid var(--border);
  padding: 20px 32px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  
  .main-wrapper {
    margin-left: 0;
  }
  
  .btn-sidebar-toggle {
    display: inline-flex;
  }
  
  .content-body {
    padding: 20px;
  }
  
  .navbar {
    padding: 0 20px;
  }
  
  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(38, 59, 43, 0.4);
    backdrop-filter: blur(2px);
    z-index: 999;
    display: none;
  }
  
  .sidebar-overlay.active {
    display: block;
  }
}

@media (max-width: 576px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stepper-container {
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
    padding: 0;
  }
  
  .stepper-progress-bar {
    display: none;
  }
  
  .step-node {
    flex-direction: row;
    gap: 14px;
    text-align: left;
  }
  
  .app-footer {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}