:root{--sidebar-width:260px;--header-height:70px;--primary:#3b5bdb;--primary-dark:#1e3a8a;--primary-light:#eef2ff;--accent:#0d9488;--bg-main:#f8faff;--bg-card:#fff;--border:#e2e8f0;--text-main:#1e293b;--text-muted:#64748b;--shadow:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased;font-family:Inter,sans-serif}.dashboard-container{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);border-right:1px solid var(--border);z-index:100;background:#fff;flex-direction:column;height:100vh;display:flex;position:fixed}.sidebar-header{height:var(--header-height);border-bottom:1px solid var(--border);align-items:center;padding:0 24px;display:flex}.sidebar-logo{color:var(--text-main);align-items:center;gap:10px;font-size:20px;font-weight:800;display:flex}.sidebar-logo span{color:var(--primary)}.sidebar-nav{flex:1;padding:24px 16px}.nav-item{color:var(--text-muted);border-radius:var(--radius);align-items:center;gap:12px;margin-bottom:4px;padding:12px 16px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{background:var(--primary-light);color:var(--primary)}.nav-item.active{background:var(--primary);color:#fff}.sidebar-footer{border-top:1px solid var(--border);padding:24px}.main-content{margin-left:var(--sidebar-width);flex-direction:column;flex:1;display:flex}.topbar{height:var(--header-height);border-bottom:1px solid var(--border);z-index:90;background:#fff;justify-content:space-between;align-items:center;padding:0 32px;display:flex;position:sticky;top:0}.page-content{width:100%;max-width:1400px;margin:0 auto;padding:32px}.card{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:24px}.grid{gap:24px;display:grid}.grid-cols-4{grid-template-columns:repeat(4,1fr)}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.stat-card{flex-direction:column;gap:8px;display:flex}.stat-label{color:var(--text-muted);font-size:14px;font-weight:500}.stat-value{font-size:28px;font-weight:700}.stat-trend{align-items:center;gap:4px;font-size:13px;display:flex}.trend-up{color:#10b981}.trend-down{color:#ef4444}.section-title{margin-bottom:24px;font-size:24px;font-weight:700}.btn{cursor:pointer;border:none;border-radius:8px;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.calendar-container{border-radius:var(--radius);border:1px solid var(--border);background:#fff;height:600px;padding:20px}