:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #eef2ff;
  --bg: #f8fafc;
  --sidebar-bg: #1e1b4b;
  --sidebar-text: #c7d2fe;
  --sidebar-active: #4f46e5;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg); color: var(--text); display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
  width: 240px; min-height: 100vh;
  background: var(--sidebar-bg);
  display: flex; flex-direction: column;
  flex-shrink: 0; position: fixed; top: 0; left: 0; bottom: 0;
}
.sidebar-logo {
  padding: 24px 20px 16px;
  color: white; font-size: 16px; font-weight: 700;
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo span { font-size: 22px; }
.sidebar-nav { flex: 1; padding: 12px 8px; }
.nav-section { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.3); padding: 16px 12px 6px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px;
  color: var(--sidebar-text); text-decoration: none;
  font-size: 14px; font-weight: 500;
  transition: background 0.15s, color 0.15s;
  margin-bottom: 2px;
}
.nav-item:hover { background: rgba(255,255,255,0.07); color: white; }
.nav-item.active { background: var(--sidebar-active); color: white; }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-footer { padding: 16px; border-top: 1px solid rgba(255,255,255,0.08); }
.sidebar-footer a { color: rgba(255,255,255,0.4); font-size: 12px; text-decoration: none; }

/* Main */
.main { margin-left: 240px; flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar {
  background: var(--white); border-bottom: 1px solid var(--border);
  padding: 16px 32px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 10;
}
.topbar-title { font-size: 18px; font-weight: 600; }
.topbar-right { display: flex; gap: 12px; align-items: center; }
.content { padding: 32px; flex: 1; }

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.card-title svg { width: 18px; height: 18px; color: var(--primary); }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Stats */
.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.stat-label { font-size: 13px; color: var(--text-light); margin-bottom: 6px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--text); }
.stat-sub { font-size: 12px; color: var(--text-light); margin-top: 4px; }
.stat-icon { float: right; font-size: 28px; }

/* Forms */
label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
input[type=text], input[type=password], textarea, select {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 12px; font-size: 14px; font-family: inherit;
  outline: none; background: var(--white); color: var(--text);
  transition: border-color 0.2s;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 80px; }
.form-group { margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-hint { font-size: 12px; color: var(--text-light); margin-top: 4px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: 8px; font-size: 14px; font-weight: 500;
  cursor: pointer; border: none; transition: background 0.15s, transform 0.1s;
  text-decoration: none;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* Badge */
.badge { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 20px; font-size: 12px; font-weight: 500; }
.badge-green { background: #dcfce7; color: #166534; }
.badge-yellow { background: #fef9c3; color: #854d0e; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-blue { background: var(--primary-light); color: var(--primary-dark); }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; padding: 10px 12px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-light); border-bottom: 2px solid var(--border); }
td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

/* Alert */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #c7d2fe; }

/* Tabs */
.tabs { display: flex; border-bottom: 2px solid var(--border); margin-bottom: 24px; gap: 0; }
.tab-btn { padding: 10px 20px; font-size: 14px; font-weight: 500; color: var(--text-light); border: none; background: none; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px; transition: color 0.15s; }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Loader */
.loader { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Flow Builder */
#drawflow-container {
  width: 100%; height: 600px;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}
.node-palette {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px;
}
.palette-node {
  padding: 8px 14px; border-radius: 8px; font-size: 13px; font-weight: 500;
  cursor: grab; border: 2px solid transparent; user-select: none;
  transition: transform 0.15s;
}
.palette-node:active { cursor: grabbing; transform: scale(0.95); }
.palette-node.node-start { background: #dcfce7; color: #166534; border-color: #86efac; }
.palette-node.node-intent { background: var(--primary-light); color: var(--primary-dark); border-color: #a5b4fc; }
.palette-node.node-response { background: #fef9c3; color: #854d0e; border-color: #fde68a; }
.palette-node.node-csat { background: #fce7f3; color: #9d174d; border-color: #f9a8d4; }
.palette-node.node-else { background: #fee2e2; color: #991b1b; border-color: #fca5a5; }
.drag-node.type-cognitive { background: #f0fdf4; color: #14532d; border-color: #86efac; }
.node-type-cognitive .node-header { background: #dcfce7; color: #14532d; }