/* CSS Variables - Luxe Minimalist Theme */
:root {
    --bg-color: #ffffff;
    --surface-color: #fcfcfc;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-color: #d4af37; /* Subtle Gold */
    --border-color: #e5e5e5;
    --error-color: #c94f4f;
    --success-color: #4fc97a;
    
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-speed: 0.3s;
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.03);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
    overflow-x: hidden;
}

h1, h2, h3, .brand-title {
    font-family: var(--font-heading);
    font-weight: 600;
}

/* Utilities */
.hidden { display: none !important; }
.error-text { color: var(--error-color); font-size: 0.85rem; margin-top: 10px; }

/* Views Toggle */
.view {
    min-height: 100vh;
    width: 100vw;
    display: flex;
}

/* --- Login View --- */
#login-view {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #f9f9f9 0%, #ffffff 100%);
}

.login-container {
    background: var(--surface-color);
    padding: 60px 40px;
    border-radius: 2px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.brand-title {
    font-size: 3rem;
    letter-spacing: 4px;
    margin-bottom: 5px;
}
.brand-subtitle {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.input-group { margin-bottom: 20px; }
.input-group input {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 0;
    background: transparent;
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-speed);
}
.input-group input:focus { border-color: var(--text-primary); }

.btn-primary {
    width: 100%;
    padding: 15px;
    background-color: var(--text-primary);
    color: white;
    border: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}
.btn-primary:hover { background-color: #333; }
.btn-primary:disabled { background-color: #ccc; cursor: not-allowed; }

/* --- App View Layout --- */
#app-view { display: flex; flex-direction: row; }

/* Sidebar */
.sidebar {
    width: 250px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 40px 0;
    background-color: var(--surface-color);
}
.brand-title-small {
    font-size: 2rem;
    letter-spacing: 3px;
    text-align: center;
    margin-bottom: 40px;
}
.nav-links {
    list-style: none;
    flex-grow: 1;
}
.nav-links li a {
    display: block;
    padding: 15px 40px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: color var(--transition-speed);
}
.nav-links li a:hover, .nav-links li a.active {
    color: var(--text-primary);
    background-color: #f5f5f5;
    border-left: 2px solid var(--accent-color);
}
.network-status {
    padding: 20px 40px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}
.indicator { width: 8px; height: 8px; border-radius: 50%; }
.indicator.online { background-color: var(--success-color); }
.indicator.offline { background-color: var(--error-color); }
.btn-text {
    padding: 20px 40px;
    background: none; border: none;
    color: var(--text-secondary);
    text-align: left;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.9rem;
}

/* Main Area */
.main-content {
    flex-grow: 1;
    background-color: var(--bg-color);
    position: relative;
    overflow-y: auto;
}

.panel {
    display: none;
    height: 100%;
}
.panel.active { display: block; }

/* POS Layout */
.pos-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    height: 100vh;
}
.section-header {
    padding: 30px 40px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.search-bar input {
    padding: 10px 20px;
    border: none; border-bottom: 1px solid var(--border-color);
    outline: none; background: transparent;
    width: 300px; font-family: var(--font-body);
}

/* Products Grid */
.products-section { border-right: 1px solid var(--border-color); overflow-y: auto; }
.products-grid {
    padding: 40px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
}

/* Minimal Table Styles */
.minimal-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    font-size: 0.9rem;
}
.minimal-table th {
    text-align: left;
    padding: 15px 20px;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 500;
}
.minimal-table td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}
.table-input {
    border: 1px solid transparent;
    background: transparent;
    padding: 5px;
    width: 80px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}
.table-input:focus {
    outline: none;
    border-color: var(--text-primary);
}
.btn-save-inline {
    background-color: var(--text-primary);
    color: #fff;
    border: none;
    padding: 6px 12px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background var(--transition-speed);
}
.btn-save-inline:hover { background-color: var(--accent-color); }
.btn-save-inline:disabled { background-color: #ccc; cursor: not-allowed; }

/* Dashboard Date Filters & KPIs */
.date-filters {
    display: flex;
    gap: 15px;
    align-items: center;
}
.minimal-select, .minimal-input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    background: transparent;
    font-family: var(--font-body);
    font-size: 0.85rem;
    outline: none;
}
#custom-date-range {
    display: flex;
    gap: 10px;
    align-items: center;
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--text-primary);
    padding: 8px 15px;
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    text-transform: uppercase;
    transition: all var(--transition-speed);
}
.btn-outline:hover {
    background: var(--text-primary);
    color: #fff;
}
.kpi-card {
    border: 1px solid var(--border-color);
    padding: 30px;
    background: var(--surface-color);
    text-align: center;
}
.kpi-card h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 400;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
}
.kpi-value {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--accent-color);
}
.product-card {
    cursor: pointer;
    border: 1px solid #fff;
    padding: 20px;
    text-align: center;
    transition: all var(--transition-speed);
}
.product-card:hover { border: 1px solid var(--border-color); box-shadow: var(--shadow-soft); }
.product-img-placeholder {
    width: 100%; height: 200px;
    background-color: #f9f9f9;
    margin-bottom: 15px;
    display: flex; justify-content: center; align-items: center;
    color: var(--text-secondary); font-size: 0.8rem;
}
.product-card h4 { font-size: 1rem; font-weight: 500; margin-bottom: 5px; }
.product-card .price { color: var(--text-secondary); font-size: 0.9rem; }
.product-card .stock { font-size: 0.75rem; margin-top: 5px; color: var(--accent-color); }

/* Cart Section */
.cart-section {
    display: flex;
    flex-direction: column;
    height: 100vh;
}
.cart-section h2 { padding: 30px 40px; border-bottom: 1px solid var(--border-color); }
.cart-items { flex-grow: 1; overflow-y: auto; padding: 20px 40px; }
.empty-cart-msg { text-align: center; color: var(--text-secondary); margin-top: 50px; font-size: 0.9rem; }

.cart-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 0; border-bottom: 1px solid var(--border-color);
}
.cart-item-details h4 { font-size: 0.9rem; }
.cart-item-details p { font-size: 0.8rem; color: var(--text-secondary); }
.cart-item-actions { display: flex; align-items: center; gap: 15px; }
.cart-qty { width: 40px; text-align: center; border: 1px solid var(--border-color); padding: 5px; }
.btn-remove { background: none; border: none; color: var(--error-color); cursor: pointer; font-size: 1.2rem; }

.cart-summary { padding: 30px 40px; background-color: var(--surface-color); border-top: 1px solid var(--border-color); }
.summary-row { display: flex; justify-content: space-between; margin-bottom: 15px; font-size: 0.9rem; }
.summary-row.total { font-weight: 600; font-size: 1.2rem; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border-color); }
.discount-input { width: 50px; text-align: right; border: 1px solid var(--border-color); padding: 5px; margin-right: 5px;}

/* Dashboard Area */
#dashboard-panel .section-header { margin-bottom: 40px; }
.dashboard-grid {
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
.chart-card {
    border: 1px solid var(--border-color);
    padding: 30px;
    background: var(--surface-color);
    box-shadow: var(--shadow-soft);
}
.chart-card h3 { font-size: 1.1rem; margin-bottom: 30px; font-weight: 400; text-transform: uppercase; letter-spacing: 1px; }

/* Responsive adjustments */
@media (max-width: 1024px) {
    .pos-layout { grid-template-columns: 1fr 1fr; }
    .dashboard-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    #app-view { flex-direction: column; }
    .sidebar { width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border-color); flex-direction: row; align-items: center; justify-content: space-between; padding: 20px; }
    .brand-title-small { margin-bottom: 0; font-size: 1.5rem; }
    .nav-links { display: flex; margin-left: 20px; }
    .pos-layout { grid-template-columns: 1fr; height: auto; }
    .products-section, .cart-section { height: 50vh; }
}