/* Basic Reset & Body Style */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: #f4f7f9;
    color: #333;
}

/* Main Layout with CSS Grid for Ads */
.site-container {
    display: grid;
    grid-template-columns: 180px 1fr 180px; /* Left Ad | Main Content | Right Ad */
    grid-template-areas: "ad-left main ad-right";
    max-width: 1600px;
    margin: 0 auto;
    gap: 20px;
    padding: 20px;
}

.ad-sidebar {
    background-color: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    border-radius: 8px;
}
.ad-sidebar-left { grid-area: ad-left; }
.ad-sidebar-right { grid-area: ad-right; }

.tool-content {
    grid-area: main;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.ad-horizontal {
    background-color: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90px;
    width: 100%;
    border-radius: 8px;
}

/* Uploader & Results Section Styling */
.uploader-section, .results-section {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    text-align: center;
}

h1 { font-size: 2.5rem; color: #1a202c; margin-top: 0; }
p { color: #718096; }

#uploadForm button {
    background-color: #4a5568;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin: 5px;
    transition: background-color 0.2s;
}
#uploadForm button[type="submit"] {
    background-color: #2d3748;
    font-weight: bold;
}
#uploadForm button:hover { background-color: #1a202c; }

#fileInput, #folderInput { display: none; }

/* Results Grid Styling */
#resultsGrid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.result-item {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 10px;
    text-align: center;
}
.result-item img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}
.result-item .status {
    font-style: italic;
    color: #a0aec0;
}
.result-item .download-btn {
    display: block;
    margin-top: 10px;
    padding: 8px 12px;
    background-color: #38a169;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
}
#downloadZipBtn {
    margin-top: 30px;
    padding: 15px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    background-color: #2c5282;
    color: white;
    border: none;
    border-radius: 8px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .site-container {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }
    .ad-sidebar { display: none; }
}