*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#1a73e8;--primary-dark:#1557b0;--primary-light:#e8f0fe;
  --bg:#f0f2f5;--card:#fff;--text:#1f1f1f;--text2:#5f6368;--border:#e0e0e0;
  --success:#34a853;--warning:#f9ab00;--danger:#ea4335;--purple:#7c3aed;
  --sidebar-bg:#0f172a;--sidebar-text:#94a3b8;--sidebar-hover:rgba(255,255,255,.06);
  --radius:10px;--shadow:0 1px 3px rgba(0,0,0,.08);--shadow-lg:0 4px 16px rgba(0,0,0,.12);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
.app{display:flex;min-height:100vh}

/* Auth */
.auth-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 100%)}
.auth-card{background:var(--card);border-radius:16px;padding:40px;width:420px;max-width:90vw;box-shadow:var(--shadow-lg)}
.auth-card .logo{text-align:center;margin-bottom:28px}
.auth-card .logo h1{font-size:24px;color:var(--primary);margin-top:12px}
.auth-card .logo p{color:var(--text2);font-size:13px}
.auth-card .logo-icon{width:64px;height:64px;background:var(--primary);color:#fff;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;font-size:28px}

/* Sidebar */
.sidebar{width:250px;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;flex-shrink:0;position:fixed;height:100vh;z-index:100;transition:transform .2s}
.sidebar-header{padding:20px;border-bottom:1px solid rgba(255,255,255,.06);display:flex;align-items:center;gap:12px}
.sidebar-header .s-icon{width:40px;height:40px;background:var(--primary);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.sidebar-header h1{font-size:15px;color:#fff;font-weight:700;line-height:1.2}
.sidebar-header span{font-size:11px;color:var(--sidebar-text)}
.nav-menu{list-style:none;padding:12px 8px;flex:1;overflow-y:auto}
.nav-section{font-size:10px;text-transform:uppercase;letter-spacing:1px;padding:16px 16px 6px;color:rgba(255,255,255,.3)}
.nav-item{display:flex;align-items:center;gap:12px;padding:10px 16px;border-radius:8px;cursor:pointer;font-size:13px;margin-bottom:1px;transition:all .12s;color:var(--sidebar-text)}
.nav-item:hover{background:var(--sidebar-hover);color:#fff}
.nav-item.active{background:rgba(26,115,232,.2);color:#fff}
.nav-item i{width:18px;text-align:center;font-size:14px}
.nav-item .badge{margin-left:auto;background:var(--danger);color:#fff;font-size:10px;padding:2px 7px;border-radius:10px;font-weight:600}
.sidebar-footer{padding:12px;border-top:1px solid rgba(255,255,255,.06)}
.sidebar-footer .user-info{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px;cursor:pointer;transition:background .12s}
.sidebar-footer .user-info:hover{background:var(--sidebar-hover)}
.sidebar-footer .avatar{width:34px;height:34px;background:var(--primary);color:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}
.sidebar-footer .user-name{font-size:13px;color:#fff}
.sidebar-footer .user-email{font-size:11px;color:var(--sidebar-text)}

.content{flex:1;margin-left:250px;padding:28px 32px;min-height:100vh}

/* Cards */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.card-header h3{font-size:16px;font-weight:600;display:flex;align-items:center;gap:8px}
.card-header h3 i{color:var(--primary)}

/* Page header */
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.page-header h2{font-size:24px;font-weight:700}
.page-header .actions{display:flex;gap:8px}

/* Stat cards */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;align-items:flex-start;gap:16px}
.stat-card .stat-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.stat-card .stat-icon.blue{background:var(--primary-light);color:var(--primary)}
.stat-card .stat-icon.green{background:#e6f4ea;color:var(--success)}
.stat-card .stat-icon.orange{background:#fef7e0;color:var(--warning)}
.stat-card .stat-icon.red{background:#fce8e6;color:var(--danger)}
.stat-card .stat-icon.purple{background:#f3e8ff;color:var(--purple)}
.stat-card .stat-value{font-size:24px;font-weight:700;line-height:1}
.stat-card .stat-label{font-size:12px;color:var(--text2);margin-top:4px}

/* Form */
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:12px;font-weight:600;margin-bottom:5px;color:var(--text2);text-transform:uppercase;letter-spacing:.3px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;transition:border-color .15s;background:#fff}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(26,115,232,.1)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-row.three{grid-template-columns:1fr 1fr 1fr}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .15s;font-family:inherit}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:var(--bg);color:var(--text)}.btn-secondary:hover{background:var(--border)}
.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#2d9249}
.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#d33426}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:6px 12px;font-size:12px}
.btn-icon{background:none;border:none;cursor:pointer;width:32px;height:32px;border-radius:6px;display:flex;align-items:center;justify-content:center;color:var(--text2);transition:all .12s}
.btn-icon:hover{background:var(--bg);color:var(--text)}
.btn-icon.danger:hover{background:#fce8e6;color:var(--danger)}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* Tables */
.data-table{width:100%;border-collapse:collapse}
.data-table th{text-align:left;padding:12px 14px;font-size:11px;text-transform:uppercase;letter-spacing:.4px;color:var(--text2);border-bottom:2px solid var(--border);white-space:nowrap}
.data-table td{padding:12px 14px;border-bottom:1px solid var(--border);font-size:13px}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:var(--bg)}
.data-table .actions{display:flex;gap:2px}
.clickable-row{cursor:pointer}

/* Status badges */
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:600;gap:4px}
.badge::before{content:'';width:6px;height:6px;border-radius:50%}
.badge-draft{background:#f0f2f5;color:#5f6368}.badge-draft::before{background:#5f6368}
.badge-sent{background:var(--primary-light);color:var(--primary)}.badge-sent::before{background:var(--primary)}
.badge-paid{background:#e6f4ea;color:var(--success)}.badge-paid::before{background:var(--success)}
.badge-overdue{background:#fce8e6;color:var(--danger)}.badge-overdue::before{background:var(--danger)}
.badge-cancelled{background:#f0f2f5;color:#999}.badge-cancelled::before{background:#999}
.badge-accepted{background:#e6f4ea;color:var(--success)}.badge-accepted::before{background:var(--success)}
.badge-rejected{background:#fce8e6;color:var(--danger)}.badge-rejected::before{background:var(--danger)}
.badge-active{background:#e6f4ea;color:var(--success)}.badge-active::before{background:var(--success)}
.badge-paused{background:#fef7e0;color:var(--warning)}.badge-paused::before{background:var(--warning)}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:flex-start;justify-content:center;z-index:1000;backdrop-filter:blur(2px);overflow-y:auto;padding:40px 16px}
.modal-overlay.open{display:flex}
.modal{background:var(--card);border-radius:14px;box-shadow:var(--shadow-lg);width:640px;max-width:100%;margin:auto}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:18px;font-weight:600}
.modal-body{padding:24px;max-height:70vh;overflow-y:auto}
.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}

/* Invoice line items */
.line-items-table{width:100%;border-collapse:collapse;margin:12px 0}
.line-items-table th{text-align:left;padding:8px;font-size:11px;text-transform:uppercase;color:var(--text2);border-bottom:1px solid var(--border)}
.line-items-table td{padding:6px 4px}
.line-items-table input,.line-items-table select{padding:8px;border:1px solid var(--border);border-radius:6px;font-size:13px;width:100%;font-family:inherit}
.line-items-table .col-desc{width:35%}
.line-items-table .col-qty{width:10%}
.line-items-table .col-unit{width:10%}
.line-items-table .col-price{width:15%}
.line-items-table .col-tax{width:10%}
.line-items-table .col-amount{width:15%;text-align:right;font-weight:600}
.line-items-table .col-del{width:5%}
.totals-block{display:flex;flex-direction:column;align-items:flex-end;gap:6px;padding:16px 0}
.totals-block .total-row{display:flex;gap:24px;font-size:14px}
.totals-block .total-row.grand{font-size:18px;font-weight:700;color:var(--primary);border-top:2px solid var(--primary);padding-top:8px}
.totals-block .total-label{min-width:120px;text-align:right;color:var(--text2)}
.totals-block .total-value{min-width:100px;text-align:right}

/* Search & filter bar */
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.search-input{position:relative;flex:1;min-width:200px}
.search-input i{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text2);font-size:14px}
.search-input input{width:100%;padding:10px 14px 10px 36px;border:1.5px solid var(--border);border-radius:8px;font-size:13px}
.search-input input:focus{outline:none;border-color:var(--primary)}
.filter-select{padding:10px 14px;border:1.5px solid var(--border);border-radius:8px;font-size:13px;background:#fff;min-width:140px}

/* Empty state */
.empty-state{text-align:center;padding:48px 20px;color:var(--text2)}
.empty-state i{font-size:48px;margin-bottom:12px;opacity:.25}
.empty-state p{font-size:14px;margin-bottom:16px}

/* Charts container */
.chart-container{position:relative;height:200px;margin-top:12px}
.chart-bar-group{display:flex;align-items:flex-end;gap:3px;height:100%;padding:0 4px}
.chart-bar{background:var(--primary);border-radius:4px 4px 0 0;min-width:24px;transition:height .3s;position:relative;cursor:pointer}
.chart-bar.expense{background:var(--danger);opacity:.7}
.chart-bar:hover{opacity:.8}
.chart-bar::after{content:attr(data-label);position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);font-size:10px;color:var(--text2);white-space:nowrap}
.chart-labels{display:flex;justify-content:space-around;padding-top:24px;font-size:10px;color:var(--text2)}

/* Tabs */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:20px}
.tab{padding:10px 20px;font-size:13px;font-weight:600;color:var(--text2);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:all .12s}
.tab:hover{color:var(--text)}
.tab.active{color:var(--primary);border-bottom-color:var(--primary)}

/* Toast */
.toast-container{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px}
.toast{background:var(--sidebar-bg);color:#fff;padding:14px 20px;border-radius:8px;font-size:13px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:10px;animation:slideIn .25s ease;min-width:280px}
.toast.success{border-left:4px solid var(--success)}.toast.error{border-left:4px solid var(--danger)}.toast.info{border-left:4px solid var(--primary)}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* Invoice preview */
.invoice-preview{background:#fff;border:1px solid var(--border);border-radius:8px;padding:32px;max-width:800px;margin:0 auto}
.invoice-preview .header-row{display:flex;justify-content:space-between;margin-bottom:24px}
.invoice-preview .company-info h2{color:var(--primary);font-size:20px}
.invoice-preview .inv-title{font-size:28px;font-weight:700;color:var(--primary);text-align:right}
.invoice-preview .inv-meta{text-align:right;font-size:13px;color:var(--text2)}
.invoice-preview .inv-meta strong{color:var(--text)}
.invoice-preview .divider{height:2px;background:var(--primary);margin:16px 0}
.invoice-preview table{width:100%;border-collapse:collapse;margin:16px 0}
.invoice-preview table th{background:var(--primary);color:#fff;padding:10px 12px;font-size:11px;text-transform:uppercase}
.invoice-preview table td{padding:10px 12px;border-bottom:1px solid var(--border);font-size:13px}

/* Responsive */
.mobile-toggle{display:none;position:fixed;top:16px;left:16px;z-index:200;background:var(--primary);color:#fff;width:40px;height:40px;border-radius:10px;border:none;font-size:18px;cursor:pointer;box-shadow:var(--shadow-lg)}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .mobile-toggle{display:flex;align-items:center;justify-content:center}
  .content{margin-left:0;padding:70px 16px 16px}
  .form-row,.form-row.three{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .planning-layout{grid-template-columns:1fr}
  .modal{width:100%}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr}
  .page-header{flex-direction:column;align-items:flex-start}
}