:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f8fafc;
    --dark: #1e293b;
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius: 0.75rem;
    --radius-sm: 0.5rem;
    --radius-lg: 1rem;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--gray-100);
    color: var(--dark);
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

button,
input,
select,
textarea {
    font-family: inherit;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--gray-100);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: bold;
    font-size: 1.25rem;
}

.logo-text {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark);
    letter-spacing: -0.025em;
}

.sidebar-menu {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
}

.menu-item {
    margin-bottom: 0.25rem;
}

.menu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--gray-500);
    font-weight: 500;
    transition: all 0.2s;
}

.menu-link:hover {
    background-color: var(--gray-100);
    color: var(--primary);
}

.menu-link.active {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow);
}

.dashboard-main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 992px) {
    .dashboard-main-grid {
        grid-template-columns: 1fr;
    }
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.menu-link .material-icons {
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--gray-100);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background-color: var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-info {
    flex: 1;
    overflow: hidden;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    height: 70px;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 90;
}

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.icon-button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    background-color: transparent;
    color: var(--gray-500);
    cursor: pointer;
    transition: all 0.2s;
}

.icon-button:hover {
    background-color: var(--gray-100);
    color: var(--primary);
}

.content-body {
    padding: 1.5rem;
}

/* Cards */
.card {
    background-color: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Dashboard Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.stat-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon .material-icons {
    font-size: 1.75rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 500;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--white);
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background-color: var(--gray-100);
}

/* Login Page */
.login-page {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e1b4b 0%, #4338ca 100%);
    position: relative;
    overflow: hidden;
}

.login-bg-shape {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.4), rgba(245, 158, 11, 0.4));
    z-index: 1;
}

.shape-1 {
    top: -200px;
    right: -100px;
}

.shape-2 {
    bottom: -200px;
    left: -100px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 10;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    display: inline-flex;
    margin-bottom: 1rem;
}

.login-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--gray-300);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-300);
    background-color: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray-300);
}

.login-card a {
    color: var(--primary-light) !important;
}

/* POS Interface */
.pos-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pos-header {
    height: 64px;
    background-color: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pos-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.pos-catalog {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: var(--gray-100);
    overflow-y: auto;
}

.pos-cart {
    width: 400px;
    background-color: var(--white);
    border-left: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
}

.categories-scroll {
    display: flex;
    gap: 0.75rem;
    overflow-x: auto;
    padding-bottom: 1.25rem;
    margin-bottom: 1.25rem;
}

.category-pill {
    white-space: nowrap;
    padding: 0.625rem 1.25rem;
    border-radius: 50px;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

.category-pill:hover,
.category-pill.active {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.25rem;
}

.product-card {
    background-color: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--gray-100);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.product-img {
    height: 140px;
    background-color: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-img .material-icons {
    font-size: 3rem;
    color: var(--gray-300);
}

.product-details {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-name {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.product-price {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
    margin-top: auto;
}

.cart-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cart-title {
    font-weight: 700;
    font-size: 1.1rem;
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.cart-item {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--gray-100);
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    font-size: 0.8125rem;
    color: var(--gray-500);
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.qty-btn {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 1px solid var(--gray-300);
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.cart-summary {
    background-color: var(--gray-50);
    padding: 1.5rem;
    border-top: 1px solid var(--gray-200);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.summary-total {
    display: flex;
    justify-content: space-between;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--gray-300);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--dark);
}

.btn-checkout {
    width: 100%;
    margin-top: 1.5rem;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 700;
}

/* Utilities */
/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
    }

    .sidebar .logo-text,
    .sidebar .menu-link span:not(.material-icons),
    .sidebar .user-info,
    .sidebar .sidebar-footer span:not(.material-icons) {
        display: none;
    }

    .main-content {
        margin-left: 80px;
    }

    .sidebar-header,
    .menu-link {
        justify-content: center;
        padding: 1rem;
    }

    .pos-cart {
        width: 300px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
        width: 260px;
    }

    .sidebar.active .logo-text,
    .sidebar.active .menu-link span:not(.material-icons),
    .sidebar.active .user-info,
    .sidebar.active .sidebar-footer span:not(.material-icons) {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .pos-body {
        flex-direction: column;
    }

    .pos-cart {
        width: 100%;
        height: 50vh;
        border-left: none;
        border-top: 1px solid var(--gray-200);
    }

    .topbar .search-box {
        display: none;
    }

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

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .login-card {
        padding: 1.5rem;
    }

    .pos-header .logo-text {
        display: none;
    }
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    margin-right: 1rem;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }
}