/* MNIST Digit Classifier - Main Styles */

/* ------------ General Styles ------------ */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: #f8f9fa;
    color: #212529;
}

/* Navbar customization */
.navbar-brand {
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Card styling */
.card {
    border: none;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.card-header {
    border-bottom: 1px solid rgba(0,0,0,0.05);
    padding: 1rem 1.5rem;
    border-radius: 12px 12px 0 0 !important;
}

/* ------------ Upload Section ------------ */
.upload-area {
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    padding: 3rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    background-color: #f8f9fa;
    max-width: 500px;
    margin: 0 auto;
}

.upload-area:hover, .upload-area.dragover {
    border-color: #0d6efd;
    background-color: rgba(13, 110, 253, 0.05);
}

.upload-icon {
    margin-bottom: 1rem;
    color: #6c757d;
}

.upload-text p {
    margin-bottom: 0.25rem;
}

.upload-area:hover .upload-icon,
.upload-area.dragover .upload-icon {
    color: #0d6efd;
}

/* ------------ Drawing Canvas ------------ */
.drawing-container {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.drawing-canvas {
    background-color: white;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    touch-action: none;
    cursor: crosshair;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* ------------ Image Previews ------------ */
.image-preview-container, .processed-preview-container {
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #dee2e6;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-preview-container {
    width: 150px;
    height: 150px;
}

.processed-preview-container {
    width: 140px;
    height: 140px;
}

.original-preview {
    max-width: 100%;
    max-height: 100%;
}

.processed-preview {
    width: 140px;
    height: 140px;
    image-rendering: pixelated; /* Show pixelation clearly */
}

/* ------------ Prediction Display ------------ */
.top-prediction {
    font-size: 5rem;
    font-weight: bold;
    color: #0d6efd;
    margin: 0.5rem 0;
    line-height: 1;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-container {
    height: 250px;
    position: relative;
    margin-top: 1rem;
}

/* ------------ Loading Overlay ------------ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1050;
}

/* ------------ Responsive Adjustments ------------ */
@media (max-width: 767.98px) {
    .top-prediction {
        font-size: 4rem;
        height: 80px;
    }

    .chart-container {
        height: 200px;
    }

    .drawing-canvas {
        width: 100%;
        max-width: 280px;
        height: auto;
    }
}

/* Animation for results */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

#results-section:not(.d-none) {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Navigation pills customization */
.nav-pills .nav-link {
    border-radius: 6px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
}

.nav-pills .nav-link.active {
    background-color: #0d6efd;
}

/* Bootstrap icons (for tab icons) */
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css");