:root {
    /* Rose Gold Theme (Default) */
    --primary: #D4AF37;
    --primary-soft: #E5C76B;
    --accent: #FFD1DC;
    --bg-dark: #0F0F0F;
    --bg-card: #1A1A1A;
    --text-main: #FFFFFF;
    --text-dim: #A0A0A0;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    --danger: #FF4D4D;
    --success: #2ECC71;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="midnight"] {
    --primary: #5D3FD3; /* Iris Blue */
    --primary-soft: #7B68EE;
    --accent: #1E1E2F;
    --bg-dark: #050510;
    --bg-card: #0A0A1F;
    --text-main: #E0E0FF;
    --text-dim: #8080A0;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(100, 100, 255, 0.1);
}

[data-theme="pearl"] {
    --primary: #2C3E50;
    --primary-soft: #34495E;
    --accent: #FDEEF4;
    --bg-dark: #F5F7FA;
    --bg-card: #FFFFFF;
    --text-main: #2D3436;
    --text-dim: #636E72;
    --glass: rgba(0, 0, 0, 0.02);
    --glass-border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', 'Inter', -apple-system, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 10px; }

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--bg-card);
    border-right: 1px solid var(--glass-border);
    padding: 1.5rem 1.2rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    color: var(--text-dim);
    text-decoration: none;
    border-radius: 12px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background: var(--glass);
    color: var(--text-main);
}

.nav-link.active {
    border-left: 3px solid var(--primary);
    background: linear-gradient(90deg, var(--glass), transparent);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 1.5rem;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 100px; height: 100px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    opacity: 0.05;
}

.stat-label {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Charts Section */
.charts-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-container {
    background: var(--bg-card);
    padding: 1.2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    height: 320px;
    display: flex;
    flex-direction: column;
}

.chart-container canvas {
    flex: 1;
    min-height: 0;
}

.chart-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Controls */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary { background: var(--primary); color: #000; }
.btn-primary:hover { background: var(--primary-soft); }

.btn-outline { background: transparent; border: 1px solid var(--glass-border); color: var(--text-main); }
.btn-outline:hover { background: var(--glass); }

.lang-toggle {
    display: flex;
    background: var(--glass);
    padding: 4px;
    border-radius: 10px;
}

.lang-btn {
    padding: 4px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--primary);
    color: #000;
}

/* Tables */
.inventory-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.inventory-table th {
    text-align: left;
    padding: 1rem;
    color: var(--text-dim);
    border-bottom: 1px solid var(--glass-border);
    font-weight: 600;
}

.inventory-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

/* Badges */
.badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success { background: rgba(46, 204, 113, 0.1); color: var(--success); }
.badge-danger { background: rgba(255, 77, 77, 0.1); color: var(--danger); }

/* Icons Buttons */
.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 5px;
    transition: var(--transition);
}

.btn-icon:hover { color: var(--primary); }

/* Responsive Adjustments */
@media (max-width: 768px) {
    body, .app-container, .main-content {
        height: auto;
        overflow: visible;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .main-content {
        margin-left: 0;
        padding: 1rem;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

    .stat-card {
        padding: 1rem;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .header-actions {
        width: 100%;
        justify-content: space-between;
    }
}

/* POS Layout */
.pos-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 1.5rem;
    height: calc(100vh - 200px);
}

.pos-products {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.product-card {
    background: var(--bg-card);
    padding: 1.2rem;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.product-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    background: var(--glass);
}

.product-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.p-name { font-weight: 600; margin-bottom: 0.3rem; }
.p-price { color: var(--primary); font-weight: 700; font-size: 1.1rem; }
.p-stock { font-size: 0.8rem; color: var(--text-dim); }

.pos-cart {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 1.5rem;
}

.cart-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--glass-border);
}

.item-info { flex: 1; }
.item-qty { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; }
.item-total { font-weight: 700; min-width: 80px; text-align: right; }

.cart-grand-total {
    display: flex;
    justify-content: space-between;
    font-size: 1.3rem;
    font-weight: 700;
    padding-top: 1rem;
    border-top: 2px solid var(--primary);
}

@media (max-width: 1024px) {
    .pos-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    .pos-cart {
        height: 400px;
    }
}


/* Print Utilities */
.print-header {
    display: none;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #000;
}

@media print {
    .sidebar, .header-actions, .btn-print-trigger, .nav-links, .sidebar-footer { display: none !important; }
    .main-content { margin-left: 0; padding: 0; width: 100%; }
    .stat-card, .chart-container { border: 1px solid #ddd; background: #fff !important; color: #000 !important; box-shadow: none !important; }
    .stat-value, .stat-label { color: #000 !important; }
    body { background: #fff !important; color: #000 !important; }
    .print-header { display: block !important; color: #000 !important; }
    #print-area { display: block !important; }
    .inventory-table th, .inventory-table td { border-bottom: 1px solid #ddd; color: #000 !important; }
    canvas { max-height: 300px !important; }
    .no-print { display: none !important; }
}

/* Login Page */
.login-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-card {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    animation: fadeIn 0.8s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-header .logo {
    justify-content: center;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dim);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 0.8rem 1rem;
    border-radius: 12px;
    color: var(--text-main);
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    background: rgba(255,255,255,0.08);
}

/* Theme Selector */
.theme-selector {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.theme-options {
    display: flex;
    gap: 10px;
    margin-top: 0.5rem;
}

.theme-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.theme-dot.active { border-color: var(--text-main); transform: scale(1.2); }
.theme-dot.rose { background: #D4AF37; }
.theme-dot.midnight { background: #5D3FD3; }
.theme-dot.pearl { background: #2C3E50; border: 1px solid #ddd; }

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1100;
}

.modal-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    width: 100%;
    max-width: 500px;
    animation: fadeIn 0.4s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.modal-header h3 {
    font-size: 1.4rem;
    color: var(--primary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}