:root{--sidebar-primary-bg: #0f172a;--sidebar-secondary-bg: #1e293b;--sidebar-text: #94a3b8;--sidebar-text-active: #ffffff;--sidebar-accent: #3b82f6;--content-bg: #f8fafc;--card-bg: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--border-color: #e2e8f0;--font-family: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--content-bg);color:var(--text-main);overflow:hidden;height:100vh}#root{height:100%}.app-container{display:flex;height:100vh;width:100vw}.primary-sidebar{width:72px;background-color:var(--sidebar-primary-bg);display:flex;flex-direction:column;align-items:center;padding:20px 0;gap:20px;z-index:50}.logo-container{width:48px;height:48px;background-color:var(--sidebar-accent);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:24px;margin-bottom:20px}.primary-nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;color:var(--sidebar-text);cursor:pointer;transition:all .2s ease;width:100%;padding:10px 0;position:relative}.primary-nav-item:hover,.primary-nav-item.active{color:var(--sidebar-text-active)}.primary-nav-item.active:before{content:"";position:absolute;left:0;top:15%;height:70%;width:4px;background-color:var(--sidebar-accent);border-radius:0 4px 4px 0}.primary-nav-item span{font-size:10px;font-weight:600;text-transform:uppercase}.secondary-sidebar{width:182px;background-color:var(--sidebar-secondary-bg);color:#fff;display:flex;flex-direction:column;padding:0;transition:width .3s ease;border-right:1px solid rgba(255,255,255,.05)}.secondary-header{padding:24px;border-bottom:1px solid rgba(255,255,255,.05)}.company-info h3{font-size:16px;font-weight:600;margin-bottom:2px}.company-info p{font-size:12px;color:var(--sidebar-text)}.secondary-nav{padding:20px 0;flex:1;overflow-y:auto}.nav-group{margin-bottom:20px}.nav-group-label{padding:0 24px;font-size:11px;font-weight:700;color:var(--sidebar-text);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;display:flex;align-items:center;gap:8px}.nav-item{padding:10px 24px;font-size:14px;color:var(--sidebar-text);cursor:pointer;display:flex;align-items:center;gap:12px;transition:all .2s}.nav-item:hover{background-color:#ffffff0d;color:#fff}.nav-item.active{background-color:#3b82f61a;color:#fff;border-right:3px solid var(--sidebar-accent)}.main-content{flex:1;overflow-y:auto;padding:32px;background-color:var(--content-bg)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-bottom:32px}.stat-card{background:var(--card-bg);padding:24px;border-radius:16px;border:1px solid var(--border-color);box-shadow:0 4px 6px -1px #0000000d}.stat-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}.stat-label{font-size:14px;color:var(--text-muted);font-weight:500}.stat-value{font-size:28px;font-weight:700;color:var(--text-main)}.stat-trend{font-size:12px;margin-top:4px;display:flex;align-items:center;gap:4px}.trend-up{color:#10b981}.trend-down{color:#ef4444}.section-title{font-size:20px;font-weight:700;margin-bottom:24px;color:var(--text-main)}.chart-container{background:var(--card-bg);padding:24px;border-radius:16px;border:1px solid var(--border-color);margin-bottom:32px;height:400px}.table-container{background:var(--card-bg);border-radius:16px;border:1px solid var(--border-color);overflow:hidden}table{width:100%;border-collapse:collapse}th{background:#f1f5f9;padding:12px 24px;text-align:left;font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase}td{padding:16px 24px;border-top:1px solid var(--border-color);font-size:14px}.status-badge{padding:4px 12px;border-radius:20px;font-size:12px;font-weight:500}.status-draft{background:#f1f5f9;color:#64748b}.status-sent{background:#dbeafe;color:#2563eb}.status-paid{background:#dcfce7;color:#166534}