:root{--sidebar-w:260px;--topbar-h:64px;--primary:#2563eb;--accent:#f97316;--success:#16a34a;--danger:#dc2626;--warning:#d97706;--info:#0891b2;--sidebar-bg:#1a2332;--sidebar-text:#94a3b8;--sidebar-hover:#243044;--sidebar-active-bg:#1e3a5f;--body-bg:#f1f5f9;--card-bg:#fff;--text-dark:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);--shadow-md:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.05);--shadow-lg:0 10px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);--radius:12px;--radius-sm:8px;--transition:all .2s ease}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',sans-serif;background:var(--body-bg);color:var(--text-dark);display:flex;min-height:100vh;overflow-x:hidden}
a{text-decoration:none;color:inherit}

/* ===== SIDEBAR ===== */
.sidebar{width:var(--sidebar-w);min-height:100vh;background:var(--sidebar-bg);display:flex;flex-direction:column;position:fixed;top:0;left:0;z-index:1000;transition:transform .3s ease;overflow-y:auto;overflow-x:hidden}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:20px 20px 16px;border-bottom:1px solid rgba(255,255,255,.07)}
.brand-logo{width:40px;height:40px;background:linear-gradient(135deg,var(--accent),#fb923c);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;flex-shrink:0}
.brand-name{display:block;color:#fff;font-weight:700;font-size:15px;line-height:1}
.brand-tagline{display:block;color:var(--sidebar-text);font-size:10px;margin-top:2px}
.sidebar-nav{flex:1;padding:12px 12px 0}
.nav-label{font-size:10px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#475569;padding:14px 8px 6px;margin-top:4px}
.nav-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--sidebar-text);font-size:13.5px;font-weight:500;transition:var(--transition);margin-bottom:2px;cursor:pointer;position:relative}
.nav-item i{width:18px;text-align:center;font-size:15px;flex-shrink:0}
.nav-item:hover{background:var(--sidebar-hover);color:#e2e8f0}
.nav-item.active{background:var(--sidebar-active-bg);color:#fff;border-left:3px solid var(--accent)}
.nav-item.active i{color:var(--accent)}
.nav-badge{margin-left:auto;background:var(--danger);color:#fff;font-size:10px;font-weight:700;padding:1px 7px;border-radius:10px;line-height:16px}
.sidebar-footer{padding:16px;border-top:1px solid rgba(255,255,255,.07);margin-top:auto}
.company-pill{display:flex;align-items:center;gap:10px}
.company-avatar{width:36px;height:36px;background:linear-gradient(135deg,var(--accent),#fb923c);border-radius:9px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px;flex-shrink:0}
.company-name-text{color:#e2e8f0;font-size:13px;font-weight:600}
.company-gstin-text{color:#64748b;font-size:10px}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:999}

/* ===== MAIN WRAPPER ===== */
.main-wrapper{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh;transition:margin .3s ease}

/* ===== TOPBAR ===== */
.topbar{height:var(--topbar-h);background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 20px;gap:16px;position:sticky;top:0;z-index:900;box-shadow:var(--shadow)}
.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}
.sidebar-toggle{background:none;border:none;color:var(--text-muted);font-size:18px;cursor:pointer;padding:6px;border-radius:8px;line-height:1;transition:var(--transition)}
.sidebar-toggle:hover{background:var(--body-bg);color:var(--text-dark)}
.topbar-breadcrumb{display:flex;align-items:center;gap:8px;color:var(--text-dark);font-weight:600;font-size:15px}
.topbar-breadcrumb i{color:var(--primary);font-size:16px}
.topbar-center{flex:1;max-width:480px;margin:0 auto}
.topbar-search{display:flex;align-items:center;gap:8px;background:var(--body-bg);border:1px solid var(--border);border-radius:10px;padding:0 14px;height:38px}
.topbar-search i{color:var(--text-muted);font-size:14px}
.topbar-search input{border:none;background:none;outline:none;font-size:13px;color:var(--text-dark);width:100%}
.topbar-right{display:flex;align-items:center;gap:8px}
.topbar-icon-btn{background:none;border:none;color:var(--text-muted);font-size:17px;cursor:pointer;padding:8px;border-radius:9px;position:relative;transition:var(--transition)}
.topbar-icon-btn:hover{background:var(--body-bg);color:var(--primary)}
.notif-dot{width:8px;height:8px;background:var(--danger);border-radius:50%;position:absolute;top:6px;right:6px;border:2px solid #fff}
.topbar-user{display:flex;align-items:center;gap:10px;cursor:pointer;padding:6px 10px;border-radius:10px;transition:var(--transition)}
.topbar-user:hover{background:var(--body-bg)}
.user-avatar-circle{width:34px;height:34px;background:linear-gradient(135deg,var(--primary),#3b82f6);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;flex-shrink:0}
.user-name-text{font-size:13px;font-weight:600;color:var(--text-dark);line-height:1}
.user-role-text{font-size:11px;color:var(--text-muted)}

/* ===== APP CONTENT ===== */
.app-content{flex:1;padding:24px;overflow-y:auto}

/* ===== SPLASH LOADER ===== */
.splash-loader{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;min-height:60vh;gap:12px}
.splash-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:18px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:28px;animation:pulse 1.5s infinite}
.splash-title{font-size:22px;font-weight:700;color:var(--text-dark)}
.splash-sub{font-size:13px;color:var(--text-muted)}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.85}}

/* ===== PAGE HEADER ===== */
.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.page-title{font-size:22px;font-weight:700;color:var(--text-dark)}
.page-subtitle{font-size:13px;color:var(--text-muted);margin-top:2px}
.page-actions{display:flex;gap:10px;flex-wrap:wrap}

/* ===== STAT CARDS ===== */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border-radius:var(--radius);padding:20px;border:1px solid var(--border);box-shadow:var(--shadow);display:flex;align-items:center;gap:16px;transition:var(--transition);position:relative;overflow:hidden}
.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.stat-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:var(--card-accent,var(--primary))}
.stat-icon{width:50px;height:50px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.stat-body{min-width:0;flex:1}
.stat-value{font-size:22px;font-weight:700;color:var(--text-dark);line-height:1.1}
.stat-label{font-size:12px;color:var(--text-muted);margin-top:4px;font-weight:500}
.stat-change{font-size:11px;font-weight:600;margin-top:6px}
.stat-change.up{color:var(--success)}
.stat-change.down{color:var(--danger)}

/* ===== CARDS ===== */
.card{border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
.card-header-custom{padding:18px 20px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.card-title-custom{font-size:15px;font-weight:700;color:var(--text-dark)}
.card-body-custom{padding:20px}

/* ===== TABLES ===== */
.table-wrapper{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);background:#fff}
.table{margin:0;font-size:13.5px}
.table thead th{background:#f8fafc;font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);border-bottom:2px solid var(--border);padding:12px 16px;white-space:nowrap}
.table tbody td{padding:13px 16px;vertical-align:middle;border-bottom:1px solid #f1f5f9;color:var(--text-dark)}
.table tbody tr:last-child td{border-bottom:none}
.table tbody tr:hover td{background:#f8fafc}
.table-actions{display:flex;gap:6px}

/* ===== BADGES ===== */
.badge-status{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:20px;font-size:11.5px;font-weight:600}
.badge-status::before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor;flex-shrink:0}
.status-paid{background:#dcfce7;color:#16a34a}
.status-unpaid{background:#fee2e2;color:#dc2626}
.status-partial{background:#fef9c3;color:#ca8a04}
.status-draft{background:#f1f5f9;color:#64748b}
.status-overdue{background:#fce7f3;color:#db2777}
.status-active{background:#dbeafe;color:#2563eb}
.status-lowstock{background:#ffedd5;color:#ea580c}

/* ===== BUTTONS ===== */
.btn-primary-custom{background:linear-gradient(135deg,var(--primary),#3b82f6);color:#fff;border:none;padding:9px 18px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:var(--transition);white-space:nowrap}
.btn-primary-custom:hover{background:linear-gradient(135deg,#1d4ed8,#2563eb);color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}
.btn-accent{background:linear-gradient(135deg,var(--accent),#fb923c);color:#fff;border:none;padding:9px 18px;border-radius:9px;font-size:13px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:var(--transition)}
.btn-accent:hover{opacity:.9;transform:translateY(-1px)}
.btn-outline-custom{background:none;border:1.5px solid var(--border);color:var(--text-dark);padding:8px 16px;border-radius:9px;font-size:13px;font-weight:500;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:var(--transition)}
.btn-outline-custom:hover{border-color:var(--primary);color:var(--primary);background:#eff6ff}
.btn-icon{width:32px;height:32px;border:none;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;font-size:13px;transition:var(--transition);flex-shrink:0}
.btn-icon-edit{background:#eff6ff;color:var(--primary)}
.btn-icon-edit:hover{background:var(--primary);color:#fff}
.btn-icon-del{background:#fff0f0;color:var(--danger)}
.btn-icon-del:hover{background:var(--danger);color:#fff}
.btn-icon-view{background:#f0fdf4;color:var(--success)}
.btn-icon-view:hover{background:var(--success);color:#fff}
.btn-icon-print{background:#f8fafc;color:var(--text-muted)}
.btn-icon-print:hover{background:var(--text-dark);color:#fff}

/* ===== FORMS ===== */
.form-section{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.form-section-title{font-size:14px;font-weight:700;color:var(--text-dark);margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.form-label{font-size:12.5px;font-weight:600;color:var(--text-dark);margin-bottom:6px}
.form-control,.form-select{border:1.5px solid var(--border);border-radius:8px;font-size:13.5px;color:var(--text-dark);padding:8px 13px;transition:var(--transition)}
.form-control:focus,.form-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1);outline:none}
.input-group-text{background:#f8fafc;border:1.5px solid var(--border);border-radius:8px;font-size:13px;color:var(--text-muted)}

/* ===== SEARCH & FILTER BAR ===== */
.filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px;background:#fff;padding:14px 18px;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}
.filter-search{flex:1;min-width:200px;display:flex;align-items:center;gap:8px;background:var(--body-bg);border:1.5px solid var(--border);border-radius:9px;padding:0 14px;height:38px}
.filter-search i{color:var(--text-muted);font-size:13px}
.filter-search input{border:none;background:none;outline:none;font-size:13px;width:100%;color:var(--text-dark)}
.filter-select{height:38px;border:1.5px solid var(--border);border-radius:9px;font-size:13px;padding:0 12px;color:var(--text-dark);background:#fff;cursor:pointer}

/* ===== TABS ===== */
.custom-tabs{display:flex;border-bottom:2px solid var(--border);gap:4px;margin-bottom:22px;overflow-x:auto}
.tab-btn{padding:10px 18px;border:none;background:none;font-size:13.5px;font-weight:500;color:var(--text-muted);cursor:pointer;border-bottom:2.5px solid transparent;margin-bottom:-2px;transition:var(--transition);white-space:nowrap}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:700}
.tab-btn:hover:not(.active){color:var(--text-dark)}

/* ===== INVOICE BUILDER ===== */
.invoice-items-table th,.invoice-items-table td{padding:10px 12px;font-size:13px}
.invoice-items-table input.form-control{padding:6px 10px;font-size:13px}
.invoice-summary{background:#f8fafc;border-radius:var(--radius-sm);padding:20px;border:1px solid var(--border)}
.summary-row{display:flex;justify-content:space-between;padding:6px 0;font-size:14px;border-bottom:1px dashed var(--border)}
.summary-row:last-child{border-bottom:none;font-size:16px;font-weight:700;color:var(--text-dark);padding-top:10px}
.summary-row span:first-child{color:var(--text-muted)}

/* ===== CHART CONTAINERS ===== */
.chart-card{background:#fff;border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow);padding:20px}
.chart-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.chart-title{font-size:14px;font-weight:700;color:var(--text-dark)}
.chart-container{position:relative;height:280px}

/* ===== LEDGER / TIMELINE ===== */
.ledger-entry{display:flex;align-items:center;padding:12px 0;border-bottom:1px solid #f1f5f9}
.ledger-entry:last-child{border-bottom:none}
.ledger-date{font-size:12px;color:var(--text-muted);min-width:90px}
.ledger-desc{flex:1;font-size:13px;color:var(--text-dark)}
.ledger-amount{font-size:14px;font-weight:700;min-width:100px;text-align:right}
.ledger-amount.credit{color:var(--success)}
.ledger-amount.debit{color:var(--danger)}

/* ===== EMPTY STATE ===== */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;gap:14px;text-align:center}
.empty-icon{font-size:48px;color:var(--border)}
.empty-title{font-size:16px;font-weight:700;color:var(--text-dark)}
.empty-sub{font-size:13px;color:var(--text-muted);max-width:300px}

/* ===== PRINT INVOICE ===== */
@media print{
  .sidebar,.topbar,.topbar-search,.page-actions,.filter-bar,.table-actions,.btn,.modal-footer,.topbar-right,.sidebar-toggle{display:none!important}
  .main-wrapper{margin:0!important}
  .app-content{padding:0!important}
  .print-invoice{font-family:Arial,sans-serif;padding:30px}
  body{background:#fff}
}
.print-invoice{background:#fff;padding:30px;max-width:800px;margin:0 auto}
.inv-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:28px;padding-bottom:20px;border-bottom:2px solid var(--border)}
.inv-company-name{font-size:22px;font-weight:800;color:var(--text-dark)}
.inv-gstin{font-size:12px;color:var(--text-muted);margin-top:4px}
.inv-title{font-size:28px;font-weight:800;color:var(--primary);text-align:right}
.inv-number{font-size:13px;color:var(--text-muted)}

/* ===== UTILITIES ===== */
.text-success-custom{color:var(--success)!important}
.text-danger-custom{color:var(--danger)!important}
.text-warning-custom{color:var(--warning)!important}
.text-primary-custom{color:var(--primary)!important}
.fw-700{font-weight:700!important}
.fs-12{font-size:12px!important}
.fs-13{font-size:13px!important}
.gap-2{gap:8px}
.rupee::before{content:'₹'}
.icon-circle{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}

/* ===== RESPONSIVE ===== */
@media(max-width:991px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.open{display:block}
  .main-wrapper{margin-left:0}
  .topbar-center{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:575px){
  .stats-grid{grid-template-columns:1fr}
  .app-content{padding:16px}
  .page-header{flex-direction:column;align-items:flex-start}
  .filter-bar{padding:12px}
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:#f1f5f9}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:#94a3b8}