:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --border-radius: 8px;

    /* New Color Variables */
    --bg-color: #f8f9fa;
    --card-bg-color: #fff;
    --text-color: #343a40;
    --text-color-muted: #6c757d;
    --border-color: #dee2e6;
    --shadow: 0 4px 12px rgba(0,0,0,0.05);
    --input-bg: #fff;
    --input-border: #ccc;
    --purchased-row-bg: #f0f0f0;
}

html.dark-mode {
    --bg-color: #1a1a1a;
    --card-bg-color: #2a2a2a;
    --text-color: #f1f1f1;
    --text-color-muted: #aaa;
    --border-color: #444;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --input-bg: #333;
    --input-border: #555;
    --purchased-row-bg: #222;

    /* Fixed Link Colors */
    a {
        color: #64b5f6; /* A lighter blue */
    }
    a:visited {
        color: #ba68c8; /* A lighter purple/magenta */
    }
    footer a { /* Ensure footer link uses muted */
        color: var(--text-color-muted);
    }

    /* Fixed Button Colors */
    .btn-secondary {
        color: var(--text-color); /* Use light text color */
        background-color: #495057; /* Slightly lighter gray */
        border-color: #495057;
    }
    .btn-secondary:hover {
        color: #fff;
        background-color: #5a6268; /* Keep existing hover */
        border-color: #5a6268;
    }

    /* Fixed Primary Button Colors */
    .btn-primary {
        background-color: #0056b3; /* Darker blue background */
        color: #fff; /* Keep text white */
        border-color: #0056b3;
    }
    .btn-primary:hover {
        background-color: #004494; /* Even darker blue on hover */
        border-color: #004494;
    }
    .btn-primary:visited {
        color: #fff; /* Ensure text stays white even when visited */
    }

     /* Popup buttons in dark mode */
    .popup-box .btn-secondary {
         color: var(--text-color);
         background-color: #495057;
         border-color: #495057;
    }
    .popup-box .btn-secondary:hover {
         color: #fff;
         background-color: #5a6268;
         border-color: #5a6268;
    }
    .popup-box .btn-primary {
        background-color: #0056b3;
        color: #fff;
        border-color: #0056b3;
    }
     .popup-box .btn-primary:hover {
         background-color: #004494;
        border-color: #004494;
    }

     /* Dark mode adjustments for search button */
    .btn-search {
         background-color: #e44d5c; /* Slightly brighter red for dark mode */
         color: #fff !important;
         border-color: #e44d5c;
    }
    .btn-search:hover {
        background-color: #dc3545; /* Standard red on hover */
        border-color: #c82333;
        color: #fff !important;
    }
    .btn-search:visited {
        color: #fff !important;
    }
}


body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.2s ease, color 0.2s ease;
}

header {
    background-color: var(--card-bg-color);
    padding: 2rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease;
    position: relative; /* Needed for absolute positioning of toggle */
}

h1 {
    margin: 0;
    color: var(--primary-color);
}

.container {
    max-width: 1200px; /* Widened container for a grid */
    margin: 2rem auto;
    padding: 0 1rem;
}

/* --- Filter Form --- */
.filter-form {
    background: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
    transition: background-color 0.2s ease;
}
.filter-form .form-group {
    margin-bottom: 0;
}
.filter-form label {
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}
.filter-form select,
.admin-card select { /* Apply styles to admin dropdowns too */
    padding: 0.75rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--input-border);
    font-size: 1rem;
    width: 100%;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box; /* Ensure padding doesn't break layout */
}
.filter-form .category-group {
    grid-column: 1 / -1; /* Span full width */
}
.category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.category-checkbox {
    font-weight: normal;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
}
.filter-form .submit-group {
    grid-column: 1 / -1; /* Span full width */
}

/* --- Price Slider Styles --- */
.price-slider-group label {
    margin-bottom: 0.75rem;
}
.dual-slider-container {
    width: 100%;
}
.range-slider {
    position: relative;
    height: 8px;
    background: var(--input-border);
    border-radius: 5px;
}
.range-fill {
    position: absolute;
    height: 100%;
    background: var(--primary-color);
    border-radius: 5px;
}
.range-slider input[type="range"] {
    position: absolute;
    width: 100%;
    top: -4px;
    height: 16px;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    pointer-events: none;
}
.range-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    pointer-events: auto;
    border: 2px solid var(--card-bg-color);
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}
.range-slider input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    pointer-events: auto;
    border: 2px solid var(--card-bg-color);
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}
.range-slider input[type="range"]::-webkit-slider-runnable-track,
.range-slider input[type="range"]::-moz-range-track {
    background: transparent;
    border: none;
}
.slider-values {
    display: flex;
    justify-content: space-between;
    margin-top: 0.75rem;
    font-weight: 600;
    color: var(--text-color-muted);
}


/* --- Item Grid & "Interesting" Card Animation --- */
.item-list {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

@keyframes fadeInSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.item-card {
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background-color 0.2s ease;

    animation: fadeInSlideUp 0.5s ease-out forwards;
    opacity: 0; /* Start hidden for animation */
}
/* Stagger the animation */
<?php for ($i = 0; $i < 50; $i++): ?>
.item-card:nth-child(<?php echo $i; ?>) {
  animation-delay: <?php echo $i * 0.05; ?>s;
}
<?php endfor; ?>


/* --- Image Styles --- */
.item-image {
    background-color: #f0f0f0; /* Keep a light placeholder */
    height: 200px; /* Fixed height */
    overflow: hidden; /* Ensure cropping works */
}
.item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* Crop image to fit */
    display: block;
}
.item-image img.clickable-image {
    cursor: pointer;
}

/* --- Card Section Styles --- */
.item-details {
    padding: 1rem; /* Slightly reduced padding */
    flex: 1 1 auto; /* Allows details to grow and fill space */
    display: flex;
    flex-direction: column;
    gap: 0.5rem; /* Space between sections */
}

/* Base style for sections */
.card-section {
    min-height: 1.2em; /* Ensure even short sections take some space */
}

.card-section-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 2.2em; /* Reserve space for ~1 line of categories */
    align-items: center; /* Vertically align size with category tags */
}
.item-category {
    background-color: var(--bg-color); /* Use bg color for contrast */
    padding: 0.15rem 0.4rem; /* Smaller padding */
    border-radius: 4px;
    color: var(--text-color-muted);
    transition: background-color 0.2s ease, color 0.2s ease;
    font-size: 0.8rem; /* Smaller font */
}
.item-category-placeholder { /* Invisible placeholder */
    display: inline-block;
    height: 1.2em; /* Match approx category height */
}
/* Size Style */
.item-size {
    font-size: 0.8rem;
    color: #212529; /* Dark text for contrast on yellow */
    background-color: #ffc107; /* Yellow background */
    padding: 0.1rem 0.4rem; /* Add some padding */
    border-radius: 4px; /* Slightly rounded corners */
    margin-left: 0.5rem; /* Space after categories */
    border: 1px solid #e0a800; /* Darker yellow border */
    white-space: nowrap; /* Prevent wrapping */
}

.card-section-title {
    flex-grow: 1; /* Allow title to push price/buttons down */
    display: flex; /* Helps vertical alignment if needed */
    align-items: center; /* Vertically center title if it's short */
    min-height: 2.7em; /* Reserve space for ~2 lines */
}
.item-card h2 {
    margin: 0;
    font-size: 1.2rem; /* Slightly smaller title */
    line-height: 1.35;
}

.card-section-price {
    text-align: right; /* Align price to the right */
}
.item-price {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.card-section-actions {
    margin-top: auto; /* Push buttons to the very bottom */
    padding-top: 0.5rem; /* Add a little space above buttons */
    border-top: 1px solid var(--border-color); /* Separator line */
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.item-actions form { /* Inherited from card-section-actions */
    margin: 0;
}
/* --- END NEW CARD SECTION STYLES --- */


@media (max-width: 600px) {
    .container {
        padding: 0 0.75rem;
    }
    .filter-form {
        grid-template-columns: 1fr;
    }
    .item-details {
        padding: 1rem;
    }
    .item-image {
        height: 150px; /* Maybe smaller height on mobile */
    }
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}
.btn-primary:hover {
    background-color: #0056b3;
}
.btn-secondary {
    background-color: var(--secondary-color);
    color: #fff;
}
.btn-secondary:hover {
    background-color: #5a6268;
}
.btn-admin { /* Legacy class, can be removed if not used elsewhere */
    background-color: #ffc107;
    color: #212529;
}
.btn-admin:hover {
    background-color: #e0a800;
}
/* Google Shopping Search Button Style */
.btn-search {
    background-color: #dc3545; /* Red background (same as delete) */
    color: #fff !important; /* White text, use !important to override dark mode 'a' color */
    border-color: #dc3545;
}
.btn-search:hover {
    background-color: #c82333; /* Darker red */
    border-color: #bd2130;
    color: #fff !important; /* Keep text white on hover */
}
/* Visited link color shouldn't affect the button text */
.btn-search:visited {
    color: #fff !important;
}


.empty-list {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-color-muted);
    background: var(--card-bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
}

footer {
    text-align: center;
    margin-top: 3rem;
    padding: 1rem;
    font-size: 0.9rem;
}
footer a {
    color: var(--text-color-muted);
}

/* --- Admin-specific styles --- */
.login-container {
    max-width: 400px;
    margin: 5rem auto;
    padding: 2rem;
    background: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: relative; /* For theme toggle positioning */
}
.login-container .theme-toggle { /* Style toggle inside login box */
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group input[type="file"] {
    width: 100%;
    padding: 0.75rem;
    box-sizing: border-box;
    border: 1px solid var(--input-border);
    background-color: var(--input-bg);
    color: var(--text-color);
    border-radius: var(--border-radius);
}
.error {
    color: #dc3545;
    margin-bottom: 1rem;
}

.admin-nav { text-align: right; margin-bottom: 2rem; display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: flex-end; }
.admin-nav a { margin-left: 0; }
.admin-card {
    background: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    transition: background-color 0.2s ease;
}
.admin-card h2 { margin-top: 0; }
.admin-card .form-group {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 1rem;
    align-items: center;
}
.admin-card .form-group label {
    margin-bottom: 0;
    text-align: right;
    font-weight: 600;
}
@media (max-width: 600px) {
    .admin-card .form-group {
        grid-template-columns: 1fr;
    }
    .admin-card .form-group label {
        text-align: left;
    }
}

.item-table { width: 100%; border-collapse: collapse; }
.item-table th, .item-table td { padding: 1rem; border: 1px solid var(--border-color); text-align: left; vertical-align: middle; }
.item-table th { background-color: var(--bg-color); } /* Changed from light-gray */
.item-table .actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.item-table img.admin-thumb {
    max-width: 100px;
    height: auto;
    border-radius: 4px;
}
.item-table img.admin-thumb.clickable-image,
.admin-card img.admin-thumb {
    max-width: 100px;
    height: auto;
    border-radius: 4px;
    cursor: pointer;
}
.purchased-row { background-color: var(--purchased-row-bg) !important; color: var(--text-color-muted); }
.purchased-row a { color: var(--text-color-muted); }
.message { padding: 1rem; background: #d4edda; color: #155724; border: 1px solid #c3e6cb; border-radius: var(--border-radius); margin-bottom: 1rem; }
.message.error { background: #f8d7da; color: #721c24; border-color: #f5c6cb; }

.status-error { color: #dc3545; font-weight: bold; }
.status-ok { color: #28a745; }


/* --- LIGHTBOX STYLES --- */
#lightbox-overlay {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    cursor: pointer;
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
}
#lightbox-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 5px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.5);
}

/* --- THEME TOGGLE STYLES --- */
.theme-toggle {
    display: inline-block;
    cursor: pointer;
    background: var(--card-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 5px 10px; /* Adjusted padding */
    font-size: 0.8rem;
    transition: all 0.2s ease;
}
.theme-toggle:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-color); /* Slight background on hover */
}
/* Position toggle in header */
header .theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
}
/* Position toggle in footer */
footer .theme-toggle {
    margin-top: 1rem;
}

/* --- Sticky Filter Section --- */
#sticky-filter-section {
    position: sticky;
    top: 0;
    z-index: 100; /* Ensure it stays on top */
    background-color: var(--bg-color); /* Match page background */
    padding: 1rem 0; /* Add some padding */
    margin-bottom: 2rem; /* Keep space below */
    border-bottom: 1px solid var(--border-color);
    transition: padding 0.3s ease, border-color 0.3s ease; /* Smooth collapse */
}

/* Style for the toggle button */
.toggle-filters-btn {
    display: block; /* Make it full width */
    width: calc(100% - 2rem); /* Account for container padding */
    margin: 0 auto 1rem auto; /* Center it with margin */
    text-align: center;
}

/* Collapsed state */
#sticky-filter-section.filters-collapsed {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid transparent; /* Hide border when collapsed */
}

#sticky-filter-section.filters-collapsed .filter-form {
    display: none; /* Hide the form itself */
}

/* Minor tweak for dark mode button */
html.dark-mode .toggle-filters-btn {
    color: var(--text-color);
    background-color: #495057;
    border-color: #495057;
}
html.dark-mode .toggle-filters-btn:hover {
    color: #fff;
    background-color: #5a6268;
    border-color: #5a6268;
}


/* --- Admin Action Button Style --- */
.btn-admin-action {
    background-color: #ffc107; /* Warning yellow */
    color: #212529 !important; /* Dark text - use !important to override dark mode */
    border-color: #ffc107;
}
.btn-admin-action:hover {
    background-color: #e0a800; /* Darker yellow */
    border-color: #e0a800;
    color: #212529 !important; /* Keep dark text on hover */
}

/* Override dark mode text color for these specific buttons */
html.dark-mode .btn-admin-action {
     color: #212529 !important;
}
html.dark-mode .btn-admin-action:hover {
     color: #212529 !important;
}

/* Styling for the hidden admin link in the header */
header #admin-link {
    display: none; /* Keep hidden by default */
    position: absolute;
    top: 1rem;
    left: 1rem; /* Position on the left */
    background: var(--card-bg-color);
    color: var(--text-color-muted); /* Use muted color */
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 5px 10px;
    font-size: 0.8rem;
    text-decoration: none;
    transition: all 0.2s ease;
}
header #admin-link:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Adjust header padding on mobile if needed */
@media (max-width: 600px) {
    header #admin-link {
        top: 4rem; /* Move below title on mobile */
        left: 50%;
        transform: translateX(-50%);
    }
     header {
        padding-bottom: 3rem; /* Add space if link is shown */
     }
}

/* --- Size Confirmation Popup --- */
.popup-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    z-index: 1010; /* Higher than sticky filter */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7); /* Darker overlay */
    justify-content: center;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
}

.popup-box {
    background: var(--card-bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.popup-box p {
    margin-top: 0;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-color);
}

.popup-box .popup-size-info {
    font-weight: bold;
    font-size: 1.3rem;
    color: var(--primary-color);
    display: block; /* Make it appear on its own line */
    margin-top: 0.5rem;
    margin-bottom: 1.5rem;
}

.popup-buttons {
    display: flex;
    justify-content: space-around; /* Space out buttons */
    gap: 1rem;
}