:root {
  --bg: #f8f9fa;
  --sidebar-bg: #1a1a2e;
  --sidebar-text: #a0a0b8;
  --sidebar-active: #fff;
  --card-bg: #fff;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-light: #eef2ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #1e293b;
  --text-muted: #64748b;
}

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

.sidebar {
  width: 220px; background: var(--sidebar-bg); color: var(--sidebar-text);
  display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; left: 0; z-index: 10;
}
.sidebar-brand { padding: 20px; font-size: 16px; font-weight: 600; color: #fff; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-brand .logo { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; background: var(--primary); color: #fff; border-radius: 8px; font-size: 14px; font-weight: 700; margin-right: 8px; }
.sidebar-nav { list-style: none; padding: 12px 0; flex: 1; }
.sidebar-nav li a { display: block; padding: 10px 20px; color: var(--sidebar-text); text-decoration: none; transition: all .2s; }
.sidebar-nav li a:hover { color: #fff; background: rgba(255,255,255,.05); }
.sidebar-nav li a.active { color: var(--sidebar-active); background: rgba(79,70,229,.3); border-right: 3px solid var(--primary); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,.1); }
.sidebar-footer a { color: var(--sidebar-text); text-decoration: none; font-size: 13px; }
.sidebar-footer a:hover { color: #fff; }

.content { margin-left: 220px; padding: 24px; flex: 1; min-height: 100vh; }

.loading { text-align: center; padding: 40px; color: var(--text-muted); }

/* Cards */
.card { background: var(--card-bg); border-radius: 12px; padding: 20px; margin-bottom: 16px; border: 1px solid var(--border); }
.card h2 { font-size: 18px; margin-bottom: 16px; }
.card h3 { font-size: 15px; margin-bottom: 12px; color: var(--text-muted); }

/* KPI Cards */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card { background: var(--card-bg); border-radius: 12px; padding: 20px; border: 1px solid var(--border); }
.kpi-card .label { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.kpi-card .value { font-size: 28px; font-weight: 700; }
.kpi-card .change { font-size: 12px; margin-top: 4px; }
.kpi-card .change.up { color: var(--success); }
.kpi-card .change.down { color: var(--danger); }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; }
tr:hover { background: var(--primary-light); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; border: 1px solid var(--border); background: #fff; color: var(--text); cursor: pointer; font-size: 14px; transition: all .2s; }
.btn:hover { background: var(--bg); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { opacity: .9; }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.sm { padding: 4px 10px; font-size: 12px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 4px; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none; transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); }

/* Tags */
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 500; }
.tag.active { background: #dcfce7; color: #166534; }
.tag.draft { background: #fef3c7; color: #92400e; }
.tag.paused { background: #fee2e2; color: #991b1b; }
.tag.completed { background: #e0e7ff; color: #3730a3; }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h1 { font-size: 24px; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); display: flex; align-items: center; justify-content: center; z-index: 100; }
.modal-box { background: #fff; border-radius: 12px; padding: 24px; width: 90%; max-width: 560px; max-height: 80vh; overflow-y: auto; }
.modal-box h2 { margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* Chart placeholder */
.chart-placeholder { height: 200px; background: var(--bg); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); }

/* Empty state */
.empty { text-align: center; padding: 40px; color: var(--text-muted); }