:root{
  --primary:#1e3a8a; --primary-dark:#152a63; --primary-light:#3b5bdb;
  --accent:#1d4ed8; --black:#141414; --bg:#f4f6fb; --surface:#ffffff;
  --text:#1f2937; --muted:#6b7280; --border:#e5e7eb;
  --green:#059669; --red:#dc2626; --orange:#ea580c; --purple:#7c3aed;
  --shadow:0 2px 12px rgba(30,58,138,.08); --shadow-lg:0 8px 30px rgba(30,58,138,.15);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box;font-family:'Poppins',sans-serif;-webkit-tap-highlight-color:transparent;}
body{background:var(--bg);color:var(--text);overflow-x:hidden;}
::-webkit-scrollbar{width:8px;height:8px;}
::-webkit-scrollbar-thumb{background:#c7d0e0;border-radius:8px;}
::-webkit-scrollbar-track{background:transparent;}

/* ---------- APP SHELL ---------- */
.app{display:flex;min-height:100vh;}
.sidebar{width:260px;background:linear-gradient(180deg,var(--primary-dark),var(--primary));color:#fff;position:fixed;top:0;left:0;bottom:0;z-index:100;display:flex;flex-direction:column;transition:transform .3s ease, width .3s ease;box-shadow:4px 0 24px rgba(0,0,0,.12);}
.sidebar.collapsed{transform:translateX(-100%);}
.sidebar-header{padding:22px 18px;display:flex;align-items:center;gap:12px;border-bottom:1px solid rgba(255,255,255,.12);}
.sidebar-header img{width:52px;height:52px;border-radius:12px;background:#fff;padding:4px;object-fit:contain;}
.sidebar-header .brand h1{font-size:15px;font-weight:700;line-height:1.2;}
.sidebar-header .brand p{font-size:10px;opacity:.7;letter-spacing:1px;text-transform:uppercase;}
.nav{flex:1;overflow-y:auto;padding:12px 10px;}
.nav-section{font-size:10px;text-transform:uppercase;letter-spacing:1.5px;opacity:.5;margin:16px 12px 6px;}
.nav-item{display:flex;align-items:center;gap:13px;padding:12px 14px;border-radius:12px;cursor:pointer;font-size:14px;font-weight:500;color:rgba(255,255,255,.82);transition:.18s;margin-bottom:3px;}
.nav-item i{width:20px;text-align:center;font-size:15px;}
.nav-item:hover{background:rgba(255,255,255,.1);color:#fff;}
.nav-item.active{background:#fff;color:var(--primary);font-weight:600;box-shadow:0 4px 12px rgba(0,0,0,.15);}
.sidebar-footer{padding:14px 18px;font-size:11px;opacity:.6;border-top:1px solid rgba(255,255,255,.1);}

.main{flex:1;margin-left:260px;min-height:100vh;display:flex;flex-direction:column;transition:margin-left .3s ease;}
.topbar{background:var(--surface);height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:50;box-shadow:0 1px 8px rgba(0,0,0,.04);}
.topbar .left{display:flex;align-items:center;gap:14px;}
.menu-btn{display:none;font-size:20px;color:var(--primary);cursor:pointer;background:none;border:none;}
.topbar h2{font-size:18px;font-weight:600;}
.topbar .right{display:flex;align-items:center;gap:10px;}
.content{padding:24px;flex:1;}

/* ---------- COMPONENTS ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:11px;border:none;font-size:14px;font-weight:600;cursor:pointer;transition:.18s;font-family:inherit;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-ghost{background:#eef2fb;color:var(--primary);}
.btn-ghost:hover{background:#e0e7f8;}
.btn-danger{background:var(--red);color:#fff;}
.btn-success{background:var(--green);color:#fff;}
.btn-sm{padding:7px 12px;font-size:12.5px;border-radius:9px;}
.btn-icon{padding:8px 10px;}

.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;}
.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;flex-wrap:wrap;gap:12px;}
.section-title h3{font-size:17px;font-weight:600;display:flex;align-items:center;gap:9px;}
.section-title h3 i{color:var(--primary);}

/* Stat cards */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin-bottom:24px;}
.stat-card{background:var(--surface);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);position:relative;overflow:hidden;transition:.2s;}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.stat-card .icon{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;margin-bottom:14px;}
.stat-card .label{font-size:12.5px;color:var(--muted);font-weight:500;}
.stat-card .value{font-size:24px;font-weight:700;margin-top:4px;font-family:'Roboto Mono',monospace;}
.stat-card .sub{font-size:11.5px;color:var(--muted);margin-top:5px;}

/* Forms */
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-size:12.5px;font-weight:600;color:var(--text);}
.field label .req{color:var(--red);}
.field input,.field select,.field textarea{padding:11px 13px;border:1.5px solid var(--border);border-radius:11px;font-size:14px;font-family:inherit;transition:.15s;background:#fbfcfe;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px rgba(30,58,138,.08);}
.field textarea{resize:vertical;min-height:70px;}

/* Table */
.table-wrap{overflow-x:auto;border-radius:12px;border:1px solid var(--border);}
table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:600px;}
thead th{background:#f1f4fb;text-align:left;padding:13px 15px;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);white-space:nowrap;}
tbody td{padding:12px 15px;border-top:1px solid var(--border);white-space:nowrap;}
tbody tr:hover{background:#f9fbff;}
.num{font-family:'Roboto Mono',monospace;font-weight:500;}
.empty-row td{text-align:center;padding:40px;color:var(--muted);}

.badge{display:inline-block;padding:4px 11px;border-radius:20px;font-size:11px;font-weight:600;}
.badge-green{background:#d1fae5;color:#065f46;}
.badge-red{background:#fee2e2;color:#991b1b;}
.badge-blue{background:#dbeafe;color:#1e40af;}
.badge-orange{background:#ffedd5;color:#9a3412;}
.badge-purple{background:#ede9fe;color:#5b21b6;}
.badge-gray{background:#f3f4f6;color:#374151;}

.row-actions{display:flex;gap:6px;}
.icon-act{width:32px;height:32px;border-radius:9px;border:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:.15s;}
.icon-act.edit{background:#dbeafe;color:#1e40af;}
.icon-act.del{background:#fee2e2;color:#991b1b;}
.icon-act.view{background:#e0e7ff;color:#3730a3;}
.icon-act:hover{transform:scale(1.1);}

/* Filters bar */
.filters{display:flex;gap:12px;flex-wrap:wrap;align-items:end;margin-bottom:18px;}
.filters .field{flex:1;min-width:150px;}
.search-box{position:relative;flex:1;min-width:200px;}
.search-box i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted);}
.search-box input{width:100%;padding:11px 13px 11px 40px;border:1.5px solid var(--border);border-radius:11px;font-size:14px;background:#fbfcfe;}

/* Tabs */
.tabs{display:flex;gap:6px;margin-bottom:20px;background:#eef2fb;padding:5px;border-radius:13px;width:fit-content;flex-wrap:wrap;}
.tab{padding:9px 18px;border-radius:10px;font-size:13.5px;font-weight:600;cursor:pointer;color:var(--muted);transition:.15s;}
.tab.active{background:#fff;color:var(--primary);box-shadow:var(--shadow);}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;z-index:200;padding:20px;}
.modal-overlay.show{display:flex;}
.modal{background:#fff;border-radius:20px;width:100%;max-width:640px;max-height:92vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:popin .25s ease;}
.modal.wide{max-width:920px;}
@keyframes popin{from{transform:scale(.94);opacity:0;}to{transform:scale(1);opacity:1;}}
.modal-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;background:#fff;z-index:2;border-radius:20px 20px 0 0;}
.modal-header h3{font-size:17px;font-weight:600;display:flex;align-items:center;gap:9px;}
.modal-header h3 i{color:var(--primary);}
.modal-close{background:#f3f4f6;border:none;width:34px;height:34px;border-radius:10px;cursor:pointer;font-size:15px;color:var(--muted);}
.modal-close:hover{background:#e5e7eb;}
.modal-body{padding:24px;}
.modal-footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px;position:sticky;bottom:0;background:#fff;}

/* Toast */
.toast-wrap{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:10px;}
.toast{background:#fff;padding:14px 18px;border-radius:12px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;font-size:14px;font-weight:500;min-width:260px;border-left:4px solid var(--primary);animation:slidein .3s;}
@keyframes slidein{from{transform:translateX(120%);}to{transform:translateX(0);}}
.toast.success{border-color:var(--green);} .toast.success i{color:var(--green);}
.toast.error{border-color:var(--red);} .toast.error i{color:var(--red);}
.toast.info i{color:var(--primary);}

/* Invoice items builder */
.item-row{display:grid;grid-template-columns:2fr 1fr 1fr 1fr auto;gap:10px;align-items:end;margin-bottom:10px;}
.line-total{display:flex;justify-content:space-between;padding:8px 0;font-size:14px;}
.line-total.grand{font-size:18px;font-weight:700;color:var(--primary);border-top:2px solid var(--border);padding-top:12px;margin-top:6px;}

.hidden{display:none!important;}
.mono{font-family:'Roboto Mono',monospace;}
.text-green{color:var(--green);} .text-red{color:var(--red);} .text-muted{color:var(--muted);}
.mb-16{margin-bottom:16px;} .mt-16{margin-top:16px;}
.flex{display:flex;} .gap-10{gap:10px;} .items-center{align-items:center;} .between{justify-content:space-between;} .wrap{flex-wrap:wrap;}

/* Dashboard chart */
.dash-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:20px;margin-bottom:24px;}
.chart-box{position:relative;height:300px;}

.page{display:none;animation:fadein .3s;}
.page.active{display:block;}
@keyframes fadein{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:translateY(0);}}

/* Database connection indicator */
.db-indicator{display:flex;align-items:center;gap:6px;font-size:11px;padding:4px 10px;border-radius:20px;background:#d1fae5;color:#065f46;}
.db-indicator.offline{background:#fee2e2;color:#991b1b;}

.overlay-bg{display:none;}
@media(max-width:1024px){.dash-grid{grid-template-columns:1fr;}}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);}
  .sidebar.open{transform:translateX(0);}
  .sidebar.collapsed{transform:translateX(-100%);}
  .main{margin-left:0!important;}
  .menu-btn{display:block;}
  .overlay-bg.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:99;}
  .item-row{grid-template-columns:1fr 1fr;}
  .content{padding:16px;}
}