@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;
    --bg-main: #f8fafc;
    --bg-sidebar: #0f172a;
    --bg-panel: #ffffff;
    --text-main: #334155;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05);
    --radius-md: 8px;
    --radius-lg: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    height: 100vh;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    z-index: 100;
}
.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}
.sidebar-header h2 { color: #fff; font-size: 1.25rem; font-weight: 600; margin-bottom: 4px; }
.sidebar-header p { font-size: 0.85rem; color: #94a3b8; }
.logo-placeholder {
    width: 60px; height: 60px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    border-radius: 12px;
    margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem; font-weight: bold; color: white; text-align: center;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}
.sidebar-menu { flex: 1; padding: 20px 0; overflow-y: auto; }
.sidebar-btn {
    display: block; padding: 14px 24px;
    color: var(--sidebar-text); text-decoration: none;
    font-weight: 500; transition: all 0.2s;
    border-left: 3px solid transparent;
}
.sidebar-btn:hover { background-color: rgba(255,255,255,0.05); color: #fff; }
.sidebar-btn.active {
    background-color: var(--sidebar-active);
    color: #fff;
    border-left-color: var(--primary);
}
.sidebar-bottom { padding: 16px; border-top: 1px solid rgba(255,255,255,0.1); }
.sidebar-action-btn {
    display: block; width: 100%; text-align: center; padding: 10px;
    margin-bottom: 8px; border-radius: var(--radius-md); text-decoration: none;
    background: rgba(255,255,255,0.05); color: var(--sidebar-text);
    transition: 0.2s; font-size: 0.9rem; font-weight: 500;
}
.sidebar-action-btn:hover { background: rgba(255,255,255,0.1); color: #fff; }

/* Main Area */
.main-wrapper {
    flex: 1; display: flex; flex-direction: column;
    height: 100vh; overflow: hidden;
}
.top-header {
    height: 70px; background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 32px; box-shadow: var(--shadow-sm); z-index: 10;
}
.top-header h1 { font-size: 1.25rem; font-weight: 600; color: #1e293b; }
.license-status {
    background: #dbeafe; color: #1e40af; padding: 6px 14px;
    border-radius: 20px; font-size: 0.85rem; font-weight: 600;
}

.main-content {
    flex: 1; padding: 32px; overflow-y: auto;
    background: var(--bg-main);
}

/* Dashboard Stats */
.dash-stats {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-bottom: 32px;
}
.stat-box {
    background: var(--bg-panel); padding: 24px;
    border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
    border: 1px solid var(--border); transition: transform 0.2s;
}
.stat-box:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-box h4 { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 12px; }
.stat-box h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 8px; }
.stat-box h2.blue { color: var(--primary); }
.stat-box h2.green { color: var(--success); }
.stat-box p { font-size: 0.85rem; color: #94a3b8; }

/* Dashboard Tables Grid */
.dash-tables { display: grid; grid-template-columns: 1.5fr 1fr; gap: 24px; }

/* Panels */
.table-panel {
    background: var(--bg-panel);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    overflow: hidden; margin-bottom: 24px;
}
.table-panel-header {
    padding: 16px 24px; background: #f8fafc;
    border-bottom: 1px solid var(--border);
    font-weight: 600; font-size: 1.05rem; color: #1e293b;
    display: flex; justify-content: space-between; align-items: center;
}
.table-panel-header.red { color: var(--danger); background: #fef2f2; border-bottom-color: #fee2e2; }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block; font-weight: 500; margin-bottom: 8px; color: #475569; font-size: 0.9rem;
}
.form-group input, .form-group select {
    width: 100%; padding: 10px 14px;
    border: 1px solid #cbd5e1; border-radius: var(--radius-md);
    font-family: inherit; font-size: 0.95rem; color: #1e293b;
    transition: all 0.2s; background: #f8fafc;
}
.form-group input:focus, .form-group select:focus {
    outline: none; border-color: var(--primary); background: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
    display: inline-block; padding: 10px 20px;
    font-weight: 500; text-align: center; cursor: pointer;
    border: none; border-radius: var(--radius-md); transition: 0.2s; font-size: 0.95rem; font-family: inherit;
}
.primary-btn { background: var(--primary); color: white; }
.primary-btn:hover { background: var(--primary-hover); }
.success-btn { background: var(--success); color: white; }
.success-btn:hover { background: var(--success-hover); }
.danger-btn { background: var(--danger); color: white; }
.danger-btn:hover { background: var(--danger-hover); }
.secondary-btn { background: #e2e8f0; color: #475569; }
.secondary-btn:hover { background: #cbd5e1; }
.w-100 { width: 100%; }
.mt-2 { margin-top: 10px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; text-align: left; }
.data-table th, .data-table td { padding: 14px 24px; border-bottom: 1px solid var(--border); }
.data-table th { background: #f8fafc; font-weight: 600; font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.data-table.red-th th { background: #fef2f2; color: var(--danger); }
.data-table tbody tr { transition: background 0.15s; }
.data-table tbody tr:hover { background: #f1f5f9; }

/* POS Layout */
.pos-layout { display: grid; grid-template-columns: 2fr 1.2fr; gap: 24px; height: calc(100vh - 140px); }
.pos-products { background: var(--bg-panel); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; }
.pos-search { padding: 20px; border-bottom: 1px solid var(--border); background: #f8fafc; }
.pos-search input { width: 100%; padding: 14px 20px; border-radius: 30px; border: 1px solid #cbd5e1; font-size: 1rem; box-shadow: inset 0 2px 4px rgba(0,0,0,0.02); }
.pos-search input:focus { outline:none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.product-grid { flex: 1; padding: 20px; display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; overflow-y: auto; background: #f1f5f9; }
.product-card { background: white; padding: 16px; border-radius: var(--radius-md); border: 1px solid var(--border); text-align: center; cursor: pointer; transition: 0.2s; box-shadow: var(--shadow-sm); }
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: #93c5fd; }
.product-card h4 { font-size: 0.95rem; color: #1e293b; margin-bottom: 8px; }
.product-card p { color: var(--primary); font-weight: 600; font-size: 1.1rem; }
.product-card span { display: block; font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

.pos-cart { background: var(--bg-panel); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); border: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; }
.cart-items { flex: 1; overflow-y: auto; padding: 0; }
.cart-items table { width: 100%; border-collapse: collapse; }
.cart-items th { position: sticky; top: 0; background: #f8fafc; padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; }
.cart-items td { padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.cart-items input[type="number"] { width: 60px; padding: 6px; border: 1px solid #cbd5e1; border-radius: 4px; text-align: center; }
.cart-summary { padding: 24px; background: #f8fafc; border-top: 1px solid var(--border); }
.cart-total { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-size: 1.4rem; font-weight: 700; color: #1e293b; }
.checkout-btn { width: 100%; padding: 16px; font-size: 1.1rem; border-radius: var(--radius-lg); background: var(--primary); color: white; border: none; font-weight: 600; cursor: pointer; transition: 0.2s; box-shadow: 0 4px 12px rgba(37,99,235,0.2); }
.checkout-btn:hover { background: var(--primary-hover); transform: translateY(-2px); }

/* Administration Tabs */
.admin-header { font-size: 1.5rem; font-weight: 700; color: #1e293b; margin-bottom: 24px; }
.admin-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 32px; background: #f8fafc; padding: 0 16px; border-radius: var(--radius-md) var(--radius-md) 0 0; }
.admin-tab { padding: 14px 24px; font-weight: 500; color: var(--text-muted); cursor: pointer; border-bottom: 3px solid transparent; transition: 0.2s; }
.admin-tab:hover { color: var(--primary); background: rgba(37,99,235,0.05); }
.admin-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-content { display: none; animation: fadeIn 0.3s; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

/* Forms & Panels inside Admin */
.tab-content > div { height: calc(100vh - 240px); }
.admin-layout .admin-left { background: var(--bg-panel); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border); padding: 24px; overflow-y: auto; }
.admin-layout .admin-right { background: var(--bg-panel); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border); overflow-y: auto; display: flex; flex-direction: column; }
.admin-layout .admin-right .table-panel-header { position: sticky; top: 0; background: var(--bg-panel); z-index: 10; }
.admin-layout .admin-right table thead { position: sticky; top: 60px; background: #f8fafc; z-index: 9; box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.panel-title { font-size: 1.1rem; font-weight: 600; color: #1e293b; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.process-btn { width: 100%; padding: 12px; font-size: 1rem; border-radius: var(--radius-md); background: var(--primary); color: white; border: none; font-weight: 600; cursor: pointer; transition: 0.2s; }
.process-btn:hover { background: var(--primary-hover); }

/* Modal */
.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(15, 23, 42, 0.75); align-items: center; justify-content: center; backdrop-filter: blur(4px); }
.modal-content { background-color: var(--bg-panel); padding: 32px; border-radius: var(--radius-lg); width: 100%; max-width: 400px; box-shadow: var(--shadow-lg); }
.modal.flex { display: flex !important; }

/* Responsive */
@media (max-width: 1024px) {
    .dash-tables { grid-template-columns: 1fr; }
    .pos-layout { grid-template-columns: 1fr; height: auto; }
}
@media (max-width: 768px) {
    .sidebar { width: 70px; }
    .sidebar-header h2, .sidebar-header p, .sidebar-btn { font-size: 0; text-align: center; }
    .sidebar-btn::before { content: '•'; font-size: 24px; }
    .main-wrapper { width: calc(100vw - 70px); }
    .admin-tabs { flex-wrap: wrap; }
    .admin-layout > div > div { grid-template-columns: 1fr !important; }
}

@media print {
    body * {
        visibility: hidden;
    }
    #receiptPrintArea, #receiptPrintArea * {
        visibility: visible;
    }
    #receiptPrintArea {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        margin: 0;
        padding: 0;
    }
    .no-print {
        display: none !important;
    }
}