:root {
    --brand-primary: #FF002B;
    --brand-secondary: #BBD4EC;
    --brand-accent: #FFEA52;

    --text-color-dark: #060E16;
    --text-color-light: #BBD4EC; /* Used on dark backgrounds */
    --background-gradient-light: linear-gradient(135deg, #FFFFFF, var(--brand-secondary));
    --background-gradient-dark: linear-gradient(52deg, var(--brand-primary), #FFC3C0); /* For hero/section backgrounds */

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--background-gradient-light);
    color: var(--text-color-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Navbar */
.navbar {
    background-color: var(--brand-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0; /* Override container padding for navbar */
}

.navbar .logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5em;
    color: white;
}

.navbar .logo img {
    height: 32px;
    margin-right: var(--spacing-sm);
}

.navbar nav a {
    color: white;
    text-decoration: none;
    margin-left: var(--spacing-xl);
    font-weight: 500;
    transition: color 0.3s ease;
}

.navbar nav a:hover {
    color: var(--brand-accent);
}

/* Headings */
h1, h2, h3 {
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-color-dark);
}

h1 {
    font-size: 2.5em;
    background: var(--background-gradient-dark);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 2em;
}

/* Buttons */
.button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

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

.primary-button:hover {
    background-color: darken(var(--brand-primary), 10%); /* Placeholder for darken, ideally a slightly darker red */
    transform: translateY(-2px);
}

.secondary-button {
    background-color: var(--brand-secondary);
    color: var(--text-color-dark);
    border: 1px solid var(--brand-secondary);
}

.secondary-button:hover {
    background-color: darken(var(--brand-secondary), 5%); /* Placeholder for darken */
    transform: translateY(-2px);
}

.delete-button {
    background-color: #dc3545; /* Bootstrap danger red */
    color: white;
}

.delete-button:hover {
    background-color: darken(#dc3545, 10%);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--brand-secondary);
    border-radius: var(--border-radius-sm);
    box-sizing: border-box;
    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-size: 1em;
}

.form-group textarea {
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(var(--brand-primary), 0.2); /* Not directly supported, use rgba with primary color */
}

/* Cards */
.card {
    background-color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--brand-secondary);
}

/* Dashboard Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid var(--brand-secondary);
}

.stat-card h3 {
    margin-top: 0;
    color: var(--brand-primary);
    font-size: 1.2em;
}

.stat-card p {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--text-color-dark);
    margin: 0;
}

/* Inventory List */
.controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    align-items: center;
}

.controls .search-input,
.controls .select-input {
    flex: 1;
    min-width: 180px;
}

.item-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.item-card {
    background-color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid var(--brand-secondary);
}

.item-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.item-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--brand-secondary); /* Placeholder for missing images */
}

.item-card-content {
    padding: var(--spacing-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.item-card h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    font-size: 1.3em;
    color: var(--brand-primary);
}

.item-card p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.9em;
    color: #555;
}

.item-card .price {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--text-color-dark);
    margin-top: auto; /* Pushes price to bottom */
    margin-bottom: var(--spacing-sm);
}

.item-card .category {
    display: inline-block;
    background-color: var(--brand-accent);
    color: var(--text-color-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8em;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.item-card .actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

/* Order List */
.order-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.order-card {
    background-color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    border: 1px solid var(--brand-secondary);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.order-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.order-card h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-xs);
    color: var(--brand-primary);
}

.order-card p {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 0.9em;
}

.order-card .status {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.8em;
    font-weight: 500;
    color: white;
    background-color: gray; /* Default */
}

.order-card .status.pending { background-color: #ffc107; color: var(--text-color-dark); } /* Warning yellow */
.order-card .status.paid { background-color: #28a745; } /* Success green */
.order-card .status.shipped { background-color: #007bff; } /* Info blue */
.order-card .status.cancelled { background-color: #dc3545; } /* Danger red */

/* Modals */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1000; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--background-gradient-light);
    margin: auto;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    width: 90%;
    max-width: 600px;
    position: relative;
    border: 1px solid var(--brand-secondary);
}

.close-button {
    color: #aaa;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-lg);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: var(--brand-primary);
    text-decoration: none;
    cursor: pointer;
}

/* Loading Skeletons */
.loading-skeleton {
    position: relative;
    overflow: hidden;
    background-color: #f0f0f0;
    border-radius: var(--border-radius-md);
}

.loading-skeleton::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.loading-skeleton .stat-card,
.loading-skeleton .item-card,
.loading-skeleton .order-card,
.loading-skeleton .card {
    opacity: 0.5; /* Dim content while loading */
    pointer-events: none; /* Prevent interaction */
}

/* Specific skeleton styles */
.stats-grid.loading-skeleton .stat-card {
    height: 120px; /* Approximate height */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.item-list.loading-skeleton .item-card {
    height: 350px; /* Approximate height */
}

.order-list.loading-skeleton .order-card {
    height: 150px; /* Approximate height */
}

.settings-section .card.loading-skeleton {
    min-height: 400px; /* Approximate height */
}


/* Media Queries for Responsiveness */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar nav {
        margin-top: var(--spacing-md);
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }

    .navbar nav a {
        margin: var(--spacing-xs) 0;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .controls .search-input,
    .controls .select-input,
    .controls .button {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .item-list {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    h1 {
        font-size: 2em;
    }
    .container {
        padding: var(--spacing-md);
    }
    .modal-content {
        width: 95%;
        padding: var(--spacing-md);
    }
}