:root{
  --navy-950:#0a0e1a;
  --navy-900:#0e1424;
  --navy-800:#141c31;
  --navy-700:#1c2740;
  --navy-600:#26335252;
  --red-600:#e53238;
  --red-700:#c9252b;
  --red-glow:rgba(229,50,56,.35);
  --text-light:#e8ecf3;
  --text-muted:#8b93a7;
  --border-col:#232d47;
}
*{box-sizing:border-box}
body{
  background:var(--navy-950);
  color:var(--text-light);
  font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
  margin:0;
}
a{text-decoration:none}
.app-wrapper{display:flex;min-height:100vh}

/* Sidebar */
.sidebar{
  width:250px;
  background:linear-gradient(180deg,var(--navy-900),var(--navy-950));
  border-right:1px solid var(--border-col);
  display:flex;flex-direction:column;
  position:fixed;top:0;bottom:0;left:0;z-index:100;
  transition:transform .25s ease;
}
.sidebar-brand{
  padding:22px 18px;
  font-weight:700;font-size:1.05rem;
  color:#fff;border-bottom:1px solid var(--border-col);
  display:flex;align-items:center;gap:10px;
}
.sidebar-brand i{color:var(--red-600);font-size:1.6rem}
.sidebar-brand small{color:var(--text-muted);font-weight:400;font-size:.7rem;letter-spacing:1px}
.sidebar-nav{padding:14px 10px;overflow-y:auto;flex:1}
.sidebar-nav a{
  display:flex;align-items:center;gap:10px;
  color:var(--text-muted);padding:10px 14px;border-radius:8px;
  font-size:.9rem;margin-bottom:2px;transition:.15s;
}
.sidebar-nav a i{width:18px;text-align:center}
.sidebar-nav a:hover{background:var(--navy-700);color:#fff}
.sidebar-nav a.active{
  background:linear-gradient(90deg,var(--red-700),var(--red-600));
  color:#fff;box-shadow:0 4px 14px var(--red-glow);
}
.nav-section{
  color:var(--text-muted);font-size:.7rem;text-transform:uppercase;
  letter-spacing:1px;margin:14px 14px 6px;font-weight:600;
}

/* Main */
.main-content{margin-left:250px;flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{
  background:var(--navy-900);border-bottom:1px solid var(--border-col);
  padding:12px 22px;position:sticky;top:0;z-index:90;
}
.content-area{padding:24px;flex:1}
.app-footer{border-top:1px solid var(--border-col);background:var(--navy-900)}

/* Cards */
.card{
  background:var(--navy-800);border:1px solid var(--border-col);
  border-radius:14px;color:var(--text-light);
}
.card-header{background:transparent;border-bottom:1px solid var(--border-col);font-weight:600}
.stat-card{
  background:linear-gradient(145deg,var(--navy-800),var(--navy-700));
  border:1px solid var(--border-col);border-radius:16px;padding:20px;
  position:relative;overflow:hidden;
}
.stat-card .icon{
  width:48px;height:48px;border-radius:12px;
  background:linear-gradient(135deg,var(--red-600),var(--red-700));
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:#fff;
  box-shadow:0 6px 18px var(--red-glow);
}
.stat-card .value{font-size:1.6rem;font-weight:700;margin:.3rem 0}
.stat-card .label{color:var(--text-muted);font-size:.82rem}

/* Tables */
.table{color:var(--text-light);--bs-table-bg:transparent}
.table thead th{border-bottom:2px solid var(--border-col);color:var(--text-muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.5px}
.table td,.table th{border-color:var(--border-col)}
.table-hover tbody tr:hover{background:var(--navy-700)}

/* Forms */
.form-control,.form-select{
  background:var(--navy-900);border:1px solid var(--border-col);color:var(--text-light);
}
.form-control:focus,.form-select:focus{
  background:var(--navy-900);color:#fff;border-color:var(--red-600);
  box-shadow:0 0 0 .2rem var(--red-glow);
}
.form-control::placeholder{color:var(--text-muted)}
label{color:var(--text-muted);font-size:.85rem;margin-bottom:4px}

/* Buttons */
.btn-danger,.btn-primary{
  background:linear-gradient(135deg,var(--red-600),var(--red-700));border:none;
}
.btn-danger:hover,.btn-primary:hover{background:linear-gradient(135deg,var(--red-700),#a81f24)}
.btn-outline-light:hover{color:var(--navy-950)}

/* Badges */
.badge.bg-success{background:#1c8a52!important}
.badge.bg-warning{background:#d99a1f!important;color:#1a1a1a!important}
.badge.bg-danger{background:var(--red-600)!important}

/* POS specific */
.pos-grid{display:grid;grid-template-columns:1fr 380px;gap:18px}
.product-tile{
  background:var(--navy-800);border:1px solid var(--border-col);border-radius:12px;
  padding:14px;cursor:pointer;transition:.15s;height:100%;
}
.product-tile:hover{border-color:var(--red-600);transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.4)}
.product-tile .name{font-weight:600;font-size:.88rem}
.product-tile .price{color:var(--red-600);font-weight:700;margin-top:4px}
.product-tile .stock{font-size:.72rem;color:var(--text-muted)}
.cart-panel{
  background:var(--navy-800);border:1px solid var(--border-col);border-radius:14px;
  display:flex;flex-direction:column;height:calc(100vh - 160px);position:sticky;top:80px;
}
.cart-items{flex:1;overflow-y:auto;padding:10px}
.cart-item{
  display:flex;justify-content:space-between;align-items:center;
  padding:10px;border-bottom:1px solid var(--border-col);
}
.cart-summary{padding:14px;border-top:1px solid var(--border-col)}
.cart-summary .row-line{display:flex;justify-content:space-between;font-size:.9rem;margin-bottom:6px;color:var(--text-muted)}
.cart-summary .total-line{display:flex;justify-content:space-between;font-size:1.3rem;font-weight:700;color:#fff;margin:10px 0}

/* Login */
.login-wrapper{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle at 20% 20%,var(--navy-800),var(--navy-950));
}
.login-card{
  background:var(--navy-900);border:1px solid var(--border-col);border-radius:18px;
  padding:40px;width:380px;box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.login-card .brand-icon{
  width:64px;height:64px;border-radius:16px;margin:0 auto 16px;
  background:linear-gradient(135deg,var(--red-600),var(--red-700));
  display:flex;align-items:center;justify-content:center;font-size:2rem;color:#fff;
  box-shadow:0 10px 30px var(--red-glow);
}

@media(max-width:991px){
  .sidebar{transform:translateX(-100%)}
  .app-wrapper.sidebar-open .sidebar{transform:translateX(0)}
  .main-content{margin-left:0}
  .pos-grid{grid-template-columns:1fr}
  .cart-panel{height:auto;position:static}
}