:root{
  /* Brand blues: Primary Blue for everyday accents, Dark Blue for hover/pressed
     states (light backgrounds want the deeper shade to keep contrast/legibility). */
  --brand:#087CFF; --brand-dark:#123BFF; --brand-light:#e3f2ff;
  --brand-bright:#00A9FF; --brand-cyan:#16D9FF; --brand-shadow:rgba(8,124,255,.32);
  --bg:#f4f5fa; --card:#ffffff; --card-alt:#f8f9fc;
  --border:#e5e7eb; --text:#111827; --muted:#6b7280;
  --danger:#dc2626; --danger-light:#fee2e2; --green:#16a34a; --green-light:#dcfce7;
  /* Sidebar - even in the light theme, the sidebar itself stays a deep navy
     blue so the (white-text) logo shows up clearly against it; dark theme
     uses a near-black sidebar. */
  --sidebar-bg:#0e1b3d; --sidebar-text:#c3cde3; --sidebar-muted:#93a0c2;
  --sidebar-border:rgba(255,255,255,.09); --sidebar-hover-bg:rgba(255,255,255,.08); --sidebar-hover-text:#ffffff;
  --sidebar-brand-text:#ffffff;
  --shadow:0 1px 2px rgba(16,24,40,.05); --shadow-md:0 4px 12px rgba(16,24,40,.08);
}
html[data-theme="dark"]{
  /* On a dark background, the brighter Bright Blue / Cyan read better than the
     deeper Primary/Dark Blue used on light backgrounds - so hover gets even
     brighter here (opposite direction from light mode, by design). */
  --brand:#00A9FF; --brand-dark:#16D9FF; --brand-light:rgba(0,169,255,.16);
  --brand-shadow:rgba(0,169,255,.35);
  --bg:#0f1117; --card:#171a23; --card-alt:#1d2130;
  --border:#2a2e3d; --text:#e5e7eb; --muted:#9ca3af;
  --danger-light:#3f1d1d; --green-light:#0f2e1c;
  --sidebar-bg:#0a0c12; --sidebar-text:#9aa4b8; --sidebar-muted:#c3cbdc;
  --sidebar-border:#1f2430; --sidebar-hover-bg:rgba(255,255,255,.06); --sidebar-hover-text:#ffffff;
  --sidebar-brand-text:#ffffff;
  --shadow:0 1px 2px rgba(0,0,0,.4); --shadow-md:0 4px 16px rgba(0,0,0,.5);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);transition:background .25s ease,color .25s ease;}
.app{display:flex;min-height:100vh;}
/* Smooth theme + hover transitions across the app */
.card,.stat,.sidebar,.topbar,table,th,td,input,select,textarea,.toggle-btn,.switch-track,.switch-thumb,.badge,.alert{
  transition:background .25s ease,color .25s ease,border-color .25s ease,box-shadow .2s ease,transform .15s ease;
}
.content > *{animation:fadeIn .35s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}

/* Sidebar */
.sidebar{width:240px;background:var(--sidebar-bg);color:var(--sidebar-text);flex-shrink:0;padding:16px 12px;position:sticky;top:0;height:100vh;overflow-y:auto;z-index:20;scrollbar-width:none;-ms-overflow-style:none;display:flex;flex-direction:column;border-right:1px solid var(--sidebar-border);transition:width .2s ease,background .25s ease,border-color .25s ease;}
.sidebar::-webkit-scrollbar{width:0;height:0;display:none;}
.sidebar .brand{padding:8px 4px 18px;margin-bottom:8px;min-height:76px;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.sidebar .brand span{color:var(--sidebar-brand-text);font-weight:700;font-size:18px;white-space:nowrap;}
.sidebar .brand img{max-height:64px;max-width:196px;width:auto;height:auto;object-fit:contain;}
.sidebar .nav-group-title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--sidebar-muted);padding:14px 10px 6px;white-space:nowrap;line-height:1.6;}
.sidebar .nav-group-title:first-child{padding-top:2px;}
.sidebar a{display:flex;align-items:center;gap:10px;padding:9px 10px;color:var(--sidebar-text);text-decoration:none;font-size:14px;border-radius:9px;margin:1px 0;transition:background .15s ease,color .15s ease;}
.sidebar a:hover{background:var(--sidebar-hover-bg);color:var(--sidebar-hover-text);}
.sidebar a.active{background:var(--brand-light);color:var(--brand);font-weight:600;}
.sidebar a.active .nav-icon{color:var(--brand);}
.nav-icon{width:18px;height:18px;flex-shrink:0;}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidebar-collapse-btn{margin-top:auto;display:flex;align-items:center;gap:10px;padding:9px 10px;background:none;border:1px solid var(--sidebar-border);border-radius:9px;color:var(--sidebar-muted);font-size:13px;cursor:pointer;width:100%;text-align:left;font-family:inherit;margin-top:14px;flex-shrink:0;}
.sidebar-collapse-btn:hover{background:var(--sidebar-hover-bg);color:var(--sidebar-hover-text);}
.sidebar-backdrop{display:none;}

/* Collapsed (icon-only) sidebar. Toggled on <html> so the JS in footer.php
   that sets this before first paint (from localStorage) avoids a flash. */
html.sidebar-collapsed .sidebar{width:76px;}
html.sidebar-collapsed .sidebar .nav-label,
html.sidebar-collapsed .sidebar .nav-group-title,
html.sidebar-collapsed .sidebar .brand span{display:none;}
html.sidebar-collapsed .sidebar .brand img{max-height:34px;max-width:44px;}
html.sidebar-collapsed .sidebar a,
html.sidebar-collapsed .sidebar-collapse-btn{justify-content:center;padding:10px 0;}
html.sidebar-collapsed .sidebar-collapse-btn .nav-icon{transform:rotate(180deg);}
@media(max-width:840px){ .sidebar-collapse-btn{display:none;} }

/* Main area */
.main{flex:1;min-width:0;}
.topbar{display:flex;justify-content:space-between;align-items:center;background:var(--card);padding:14px 24px;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10;gap:12px;}
.topbar-title{font-size:19px;font-weight:700;flex:1;}
.topbar{min-height:76px;}
.topbar-title{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.topbar-company{color:var(--muted);font-size:14px;display:flex;align-items:center;height:100%;flex:0 0 auto;overflow:visible;}
.topbar-logo{max-height:60px;max-width:210px;width:auto;height:auto;object-fit:contain;flex-shrink:0;}

/* Top-right account menu (avatar + name + Settings/Logout dropdown) */
.account-menu{position:relative;flex-shrink:0;}
.account-menu-btn{display:flex;align-items:center;gap:8px;background:none;border:1px solid transparent;border-radius:999px;padding:5px 10px 5px 5px;cursor:pointer;font-family:inherit;color:var(--text);transition:background .15s ease,border-color .15s ease;}
.account-menu-btn:hover{background:var(--card-alt);border-color:var(--border);}
.account-avatar{width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex-shrink:0;}
.account-name{font-size:14px;font-weight:600;white-space:nowrap;}
.account-caret{width:14px;height:14px;color:var(--muted);transition:transform .15s ease;}
.account-menu.open .account-caret{transform:rotate(180deg);}
.account-menu-dropdown{display:none;position:absolute;right:0;top:calc(100% + 8px);background:var(--card);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow-md);min-width:170px;padding:6px;z-index:30;}
.account-menu.open .account-menu-dropdown{display:block;}
.account-menu-dropdown a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:7px;color:var(--text);text-decoration:none;font-size:13px;}
.account-menu-dropdown a:hover{background:var(--card-alt);}
.account-menu-dropdown .nav-icon{width:16px;height:16px;color:var(--muted);}
@media(max-width:480px){ .account-name{display:none;} }
.menu-toggle{display:none;background:none;border:none;font-size:20px;color:var(--text);cursor:pointer;padding:4px 8px;}
.content{padding:24px;max-width:1400px;}

/* Alerts */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;}
.alert-success{background:var(--green-light);color:#166534;}
html[data-theme="dark"] .alert-success{color:#86efac;}
.alert-danger{background:var(--danger-light);color:#991b1b;}
html[data-theme="dark"] .alert-danger{color:#fca5a5;}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:var(--shadow);}
.card:hover{box-shadow:var(--shadow-md);}
.grid{display:grid;gap:16px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:900px){.grid-4{grid-template-columns:repeat(2,1fr);}}

/* Stat tiles */
.stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:var(--shadow);position:relative;overflow:hidden;}
.stat:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);}
.stat .label{color:var(--muted);font-size:13px;display:flex;align-items:center;gap:8px;}
.stat .value{font-size:24px;font-weight:700;margin-top:6px;}
.stat .icon{width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;}
.stat.stat-blue .icon{background:var(--brand-light);color:var(--brand);}
.stat.stat-green .icon{background:var(--green-light);color:var(--green);}
.stat.stat-red .icon{background:var(--danger-light);color:var(--danger);}
.stat.stat-amber .icon{background:#fef3c7;color:#b45309;}
html[data-theme="dark"] .stat.stat-amber .icon{background:#3f2d0a;color:#fbbf24;}

/* Dashboard welcome header + period filter */
.dash-welcome{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:20px;}
.dash-welcome h2{margin:0 0 4px;font-size:22px;}
.dash-welcome p{margin:0;font-size:13px;}
.dash-period-form{display:flex;gap:8px;flex-shrink:0;}
.dash-period-form select{width:auto;background:var(--card);border-radius:8px;}

/* Dashboard stat cards v2: circular icon badge, trend badge, sparkline */
.stat-top{display:flex;align-items:center;gap:12px;margin-bottom:2px;}
.stat-icon-circle{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.stat-icon-svg{width:20px;height:20px;}
.stat-icon-blue{background:var(--brand-light);color:var(--brand);}
.stat-icon-green{background:var(--green-light);color:var(--green);}
.stat-icon-red{background:var(--danger-light);color:var(--danger);}
.stat-icon-amber{background:#fef3c7;color:#b45309;}
html[data-theme="dark"] .stat-icon-amber{background:#3f2d0a;color:#fbbf24;}
.stat-trend{font-size:12px;font-weight:600;margin-top:6px;display:flex;align-items:center;gap:4px;}
.stat-trend.trend-up{color:var(--green);}
.stat-trend.trend-down{color:var(--danger);}
.stat-trend .text-muted{font-weight:400;}
.sparkline{display:block;margin-top:10px;opacity:.85;}

/* Tables */
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden;}
th,td{padding:11px 14px;border-bottom:1px solid var(--border);font-size:14px;text-align:left;}
th{background:var(--card-alt);font-weight:600;color:var(--muted);text-transform:uppercase;font-size:11px;letter-spacing:.04em;}
tr:hover td{background:var(--card-alt);}
tbody tr,tr{transition:background .15s ease;}
.text-right{text-align:right;}

/* Buttons */
.btn{display:inline-block;background:var(--brand);color:#fff;border:none;padding:9px 16px;border-radius:8px;font-size:14px;cursor:pointer;text-decoration:none;font-weight:600;transition:background .15s ease,transform .1s ease,box-shadow .15s ease;}
.btn:hover{background:var(--brand-dark);box-shadow:0 4px 12px var(--brand-shadow);transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn-danger{background:var(--danger);}
.btn-danger:hover{background:#b91c1c;}
.btn-secondary{background:var(--muted);}
.btn-sm{padding:5px 10px;font-size:12px;}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:10px;}

/* Forms */
form .field{margin-bottom:14px;}
label{display:block;font-size:13px;color:var(--muted);margin-bottom:5px;font-weight:600;}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:var(--card);color:var(--text);}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);border-color:var(--brand);}
input[readonly]{background:var(--card-alt);color:var(--muted);}
.row{display:flex;gap:14px;flex-wrap:wrap;}
.row > *{flex:1;min-width:160px;}
.item-table input{padding:6px 8px;}

/* Login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#087CFF,#111827);}
.login-card{background:var(--card);padding:36px;border-radius:16px;width:100%;max-width:360px;box-shadow:0 20px 50px rgba(0,0,0,.3);}
.login-card h1{font-size:22px;margin-bottom:4px;}
.login-card p{color:var(--muted);font-size:13px;margin-top:0;margin-bottom:22px;}
.login-logo{max-height:56px;max-width:220px;display:block;margin-bottom:14px;}

/* Badges */
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600;}
.badge-dr{background:var(--danger-light);color:#991b1b;}
.badge-cr{background:var(--green-light);color:#166534;}
html[data-theme="dark"] .badge-dr{color:#fca5a5;}
html[data-theme="dark"] .badge-cr{color:#86efac;}
.text-muted{color:var(--muted);}
a{color:var(--brand);}
hr{border:none;border-top:1px solid var(--border);}

/* Toggle button groups (Settings appearance, Payment cash/in-out) */
.toggle-group{display:flex;gap:8px;flex-wrap:wrap;}
.toggle-btn{position:relative;border:2px solid var(--border);border-radius:8px;padding:10px 18px;cursor:pointer;font-size:14px;font-weight:600;color:var(--muted);user-select:none;background:var(--card);}
.toggle-btn input{position:absolute;opacity:0;pointer-events:none;}
.toggle-btn:has(input:checked),.toggle-btn.is-active{border-color:var(--brand);color:var(--brand);background:var(--brand-light);}
.toggle-in:has(input:checked),.toggle-in.is-active{border-color:var(--green);color:var(--green);background:var(--green-light);}
.toggle-out:has(input:checked),.toggle-out.is-active{border-color:var(--danger);color:var(--danger);background:var(--danger-light);}

/* Responsive sidebar (mobile) */
@media (max-width:840px){
  .menu-toggle{display:block;}
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);transition:transform .2s ease;box-shadow:var(--shadow-md);width:240px !important;}
  html.sidebar-collapsed .sidebar .nav-label,
  html.sidebar-collapsed .sidebar .nav-group-title,
  html.sidebar-collapsed .sidebar .brand span{display:block;}
  html.sidebar-collapsed .sidebar .brand img{max-height:64px;max-width:196px;}
  html.sidebar-collapsed .sidebar a{justify-content:flex-start;padding:9px 10px;}
  .app.sidebar-open .sidebar{transform:translateX(0);}
  .sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:15;}
  .app.sidebar-open .sidebar-backdrop{display:block;}
  .grid-4{grid-template-columns:1fr 1fr;}
}
@media(max-width:480px){
  .grid-4{grid-template-columns:1fr;}
  .content{padding:16px;}
}

/* Printable Sales Invoice / Purchase Bill "View" page */
.invoice-doc{max-width:820px;margin:0 auto;}
.invoice-head{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;border-bottom:2px solid var(--border);padding-bottom:16px;margin-bottom:16px;flex-wrap:wrap;}
.invoice-company-name{font-size:20px;font-weight:700;}
.invoice-title{text-align:right;}
.invoice-title h2{margin:0 0 6px;font-size:18px;letter-spacing:.04em;color:var(--brand);}
.invoice-title div{font-size:13px;color:var(--muted);}
.invoice-parties{display:flex;justify-content:space-between;gap:20px;margin-bottom:18px;flex-wrap:wrap;font-size:13px;}
.invoice-label{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:4px;}
.invoice-party-name{font-weight:700;font-size:15px;}
table.invoice-items{width:100%;border-collapse:collapse;margin-bottom:18px;}
table.invoice-items th,table.invoice-items td{padding:9px 10px;border-bottom:1px solid var(--border);font-size:13px;text-align:left;}
table.invoice-items th{background:var(--card-alt);text-transform:uppercase;font-size:11px;letter-spacing:.04em;color:var(--muted);}
.invoice-totals{max-width:300px;margin-left:auto;font-size:13px;}
.invoice-totals .totals-row{display:flex;justify-content:space-between;padding:4px 0;}
.invoice-totals .totals-final{border-top:1px solid var(--border);margin-top:4px;padding-top:8px;font-size:16px;font-weight:700;}
.invoice-narration{margin-top:6px;font-size:13px;color:var(--muted);}
.invoice-footer{margin-top:48px;display:flex;justify-content:space-between;align-items:flex-end;font-size:12px;color:var(--muted);}
.invoice-signature{border-top:1px solid var(--border);padding-top:6px;min-width:180px;text-align:center;}

@media print{
  .sidebar,.topbar,.menu-toggle,.sidebar-backdrop,.no-print,.alert{display:none !important;}
  .app{display:block !important;}
  .main{width:100% !important;}
  .content{padding:0 !important;max-width:100% !important;}
  body{background:#fff !important;}
  .card.invoice-doc{box-shadow:none !important;border:none !important;padding:0 !important;}
}