* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color: transparent; outline: none; }
html, body { height:100%; overflow:hidden; }
body { font-family:"Cairo",sans-serif; background:#f4f6f8; color: #333; display:flex; flex-direction:column; padding: 0 4px; }

svg { vertical-align: middle; }

#settings-btn { flex-shrink: 0; width: 40px; height: 40px; background: #ffffff; color: #333; border: 1px solid #e2e8f0; border-radius: 12px; cursor: pointer; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 5px rgba(0,0,0,0.02); transition: 0.15s ease; }
#settings-btn:active { transform: scale(0.93); background: #f8fafc; }

#total-box { background:#fff; padding:10px 14px; border-radius:14px; border-right: 5px solid #0d47a1; display:flex; flex-direction: column; gap: 2px; font-weight:900; font-size:13px; flex-shrink:0; margin:6px 0; box-shadow:0 2px 10px rgba(0,0,0,0.04); border: 1px solid #f1f5f9; }
.total-row { display: flex; justify-content: space-between; align-items: center; }
#total-lbp { color: #0d47a1; font-size: 1.2em; }
#total-usd { color: #10b981; font-family: sans-serif; font-size: 1.05em; }
#rate-display { color: #64748b; font-size: 0.85em; font-weight: 700; }
#customer-display { background: #f1f5f9; color: #334155; padding: 4px 10px; border-radius: 6px; font-size: 0.9em; margin-top: 4px; display: none; text-align: center; border: 1px solid #e2e8f0; }

#input-box { background:#fff; border-radius:12px; border:1px solid #e2e8f0; font-size:18px; font-weight:900; color:#1e293b; text-align:right; height:42px; padding: 0 12px; display: flex; align-items: center; justify-content: flex-end; transition: 0.2s; }

.keypad-top { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 5px; width: 100%; margin: 0 auto 5px; flex-shrink: 0; }
.keypad { display:grid; grid-template-columns:repeat(4,1fr); gap:5px; width: 100%; margin:0 auto 5px; flex-shrink:0; }
.key { background: #ffffff; color: #334155; border: 1px solid #e2e8f0; border-radius: 10px; font-size: 13px; font-weight: 800; cursor: pointer; display: flex; align-items: center; justify-content: center; min-height: 38px; user-select: none; box-shadow: 0 2px 4px rgba(0,0,0,0.02); transition: 0.1s; }
.key:active { transform: scale(0.92) translateY(2px); background: #f8fafc; box-shadow: inset 0 2px 4px rgba(0,0,0,0.05); }
.key.zero, .key.dbl { background: #f8fafc; }
.key.back { background: #fff0f0; color: #ef4444; border-color: #ffcdd2; }
.key.back:active { background: #ffebee; }

/* شريط الأقسام الجديد */
.sections-bar { display: flex; gap: 6px; overflow-x: auto; padding: 4px; scrollbar-width: none; background: #fff; border-radius: 12px; margin-bottom: 6px; flex-shrink: 0; border: 1px solid #e2e8f0; box-shadow: 0 2px 4px rgba(0,0,0,0.02); }
.sec-tab { padding: 8px 18px; font-weight: 800; font-size: 14px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; cursor: pointer; color: #64748b; white-space: nowrap; flex-shrink: 0; user-select: none; transition: 0.2s; }
.sec-tab.active { background: #0d47a1; color: #fff; border-color: #0d47a1; box-shadow: 0 2px 8px rgba(13,71,161,0.2); }
.sec-tab:active { transform: scale(0.95); }
.sec-add { background: #eff6ff; color: #1d4ed8; font-size: 16px; padding: 6px 16px; border-color: #bfdbfe; }

.main-wrapper { flex:1; display:flex; flex-direction:column; overflow:hidden; }
.main { flex:1; display:flex; gap:5px; padding:5px; overflow:hidden; background: #fff; border-radius: 16px 16px 0 0; box-shadow: 0 -5px 20px rgba(0,0,0,0.03); position: relative; border: 1px solid #f1f5f9; border-bottom: none; }
.sort-indicator { position: absolute; inset:0; border: 3px dashed #3b82f6; border-radius: 12px; pointer-events: none; z-index: 50; display: none; background: rgba(59,130,246,0.05); justify-content: center; align-items: center; margin: 4px; }
.col { flex: 1; display: flex; flex-direction: column; gap: 4px; overflow: hidden; padding: 2px; height: 100%; }
.btn { flex: 1; padding: 4px; background: #ffffff; color: #334155; border: 1px solid #e2e8f0; border-right: 4px solid #0d47a1; border-radius: 8px; font-size: 11px; font-weight: 800; cursor: pointer; display: flex; align-items: center; justify-content: center; text-align: center; box-shadow: 0 2px 4px rgba(0,0,0,0.02); user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; transition: 0.15s; height: 100%; min-height: 0; }
.btn:active { transform: scale(0.95); background: #f8fafc; }
.btn.sorting-selected { background: #eff6ff !important; border-color: #3b82f6 !important; transform: scale(0.95); box-shadow: 0 0 0 2px rgba(59,130,246,0.2) !important; }
.btn.empty-slot { background: rgba(248,250,252,0.6); border: 2px dashed #cbd5e1; border-right: 2px dashed #cbd5e1 !important; color: #94a3b8; box-shadow: none; opacity: 0.8; }
.btn.empty-slot svg { stroke: #cbd5e1; transition: 0.2s; }
.btn.empty-slot:hover svg { stroke: #94a3b8; }

/* Drawer */
.menu-overlay { position: fixed; inset: 0; background: rgba(15, 23, 42, 0.4); backdrop-filter: blur(2px); z-index: 9999; opacity: 0; visibility: hidden; transition: 0.3s ease; }
.menu-overlay.active { opacity: 1; visibility: visible; }
.side-menu { position: fixed; top: 0; right: -280px; width: 260px; height: 100%; background: #ffffff; z-index: 10000; box-shadow: -5px 0 30px rgba(0,0,0,0.1); transition: right 0.3s ease; display: flex; flex-direction: column; overflow-y: auto; }
.side-menu.open { right: 0; }

.menu-header { padding: 30px 16px 16px; display: flex; flex-direction: column; align-items: center; border-bottom: 1px solid #f1f5f9; background: #f8fafc; }
.user-avatar { width: 55px; height: 55px; border-radius: 50%; background: #f1f5f9; color: #64748b; display: flex; align-items: center; justify-content: center; margin-bottom: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.05); border: 2px solid #fff; }
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-name { font-size: 14px; font-weight: 800; color: #1e293b; margin-bottom: 2px; }
.user-email { font-size: 11px; color: #64748b; font-weight: 600; }

.menu-action { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; color: #334155; font-size: 13px; font-weight: 700; cursor: pointer; transition: background 0.2s; }
.menu-action:active { background: #f1f5f9; }
.menu-action .icon { color: #475569; display: flex; align-items: center; justify-content: center; }
.menu-action.danger { color: #ef4444; }
.menu-action.danger .icon { color: #ef4444; }
.menu-divider { height: 1px; background: #f1f5f9; margin: 4px 16px; }

/* Modals */
.custom-modal { position: fixed; inset: 0; background: rgba(15, 23, 42, 0.4); backdrop-filter: blur(2px); display: flex; align-items: center; justify-content: center; z-index: 10000; opacity: 0; visibility: hidden; transition: 0.25s ease; padding: 10px; }
.custom-modal:not(.hidden) { opacity: 1; visibility: visible; }
.modal-content { background: #ffffff; border-radius: 16px; padding: 16px; width: 100%; max-width: 340px; text-align: center; transform: translateY(15px) scale(0.97); transition: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1); max-height: 90vh; overflow-y: auto; scrollbar-width: none; }
.custom-modal:not(.hidden) .modal-content { transform: translateY(0) scale(1); }

.modal-title { font-size: 15px; font-weight: 900; color: #0f172a; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid #f1f5f9; }

.pay-input { width: 100%; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 8px 12px; color: #1e293b; font-family: inherit; font-size: 13px; margin-bottom: 8px; outline: none; transition: 0.2s; text-align: right; font-weight: 700; }
.pay-input:focus { border-color: #3b82f6; background: #fff; box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
.pay-input::placeholder { color: #94a3b8; font-weight: 600; }

.menu-btn { display: flex; align-items: center; justify-content: space-between; gap: 8px; width: 100%; padding: 10px 12px; margin-bottom: 6px; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 12px; font-weight: 800; color: #334155; cursor: pointer; transition: 0.2s; font-family: inherit; box-shadow: 0 1px 2px rgba(0,0,0,0.02); }
.menu-btn:active { transform: scale(0.97); background: #f8fafc; }
.menu-btn .icon { display:flex; align-items:center; }
.btn-add { background: #eff6ff !important; color: #1d4ed8 !important; border-color: #bfdbfe !important; }

/* Lists */
.bill-row, .customer-row { border-bottom: 1px solid #f1f5f9; padding: 8px 10px; border-radius: 10px; margin-bottom: 6px; background: #ffffff; transition: 0.2s; cursor: pointer; display: flex; align-items: center; justify-content: space-between; color: #334155; font-size: 12px; border: 1px solid #e2e8f0; font-weight: 700; }
.bill-row:active, .customer-row:active { background: #f8fafc; transform: scale(0.98); }
.bill-note { font-size: 10px; color: #fff; background: #3b82f6; padding: 2px 6px; border-radius: 6px; display: inline-block; margin-top: 4px; }
.mini-bill-item { font-size: 11px; color: #64748b; padding: 4px 0; border-bottom: 1px dashed #e2e8f0; display: flex; justify-content: space-between; }

.selection-bar { display: none; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.chk-select { width: 18px; height: 18px; margin-left: 10px; accent-color: #3b82f6; display: none; }
.showing-checks .chk-select { display: block; }

#receipt { position:fixed; top:55px; right:-270px; width:250px; background:#ffffff; padding:12px; z-index:100; border-radius:16px; box-shadow: -5px 5px 25px rgba(0,0,0,0.08); border: 1px solid #e2e8f0; transition: right 0.3s cubic-bezier(0.34, 1.56, 0.64, 1); max-height: calc(100vh - 70px); display: flex; flex-direction: column; }
#receipt.show { right: 8px; }

#toast-notification { position: fixed; bottom: 70px; left: 50%; transform: translateX(-50%); background: #1e293b; color: #fff; padding: 10px 20px; border-radius: 20px; font-size: 12px; font-weight: 700; z-index: 20000; display: none; opacity: 0; transition: 0.3s; box-shadow: 0 8px 20px rgba(0,0,0,0.15); pointer-events: none; }
#toast-notification.show { display: block; opacity: 1; }

/* =========================================================
   تعديلات نسخة الكمبيوتر (التجاوب مع الشاشات الكبيرة)
   ========================================================= */
@media (min-width: 768px) {
    body {
        display: grid;
        grid-template-columns: 1fr 350px; /* القسم العريض يمين للأصناف والرفيع يسار للحساب */
        grid-template-rows: auto auto auto 1fr;
        grid-template-areas:
            "main total"
            "main ctrl"
            "main ktop"
            "main keys";
        gap: 15px;
        padding: 15px;
    }
    #total-box { grid-area: total; margin: 0; }
    #control-bar { grid-area: ctrl; margin: 0 !important; }
    .keypad-top { grid-area: ktop; margin: 0; }
    .keypad { grid-area: keys; margin: 0; gap: 8px; }
    
    .main-wrapper { 
        grid-area: main; 
        margin: 0; 
    }
    .main {
        border: 1px solid #e2e8f0; 
        border-radius: 16px; 
        box-shadow: 0 4px 15px rgba(0,0,0,0.02); 
        padding: 10px;
    }
    
    .key { min-height: 60px; font-size: 18px; }
    .btn { font-size: 15px; flex: 1; min-height: 0; }
    
    #receipt { 
        width: 380px; 
        right: -400px; 
        top: 15px; 
        max-height: calc(100vh - 30px); 
        border-radius: 20px; 
        box-shadow: -5px 5px 30px rgba(0,0,0,0.15); 
    }
    #receipt.show { right: 15px; }
    
    .custom-modal .modal-content { max-width: 450px; padding: 25px; }
}