/* Custom styles for PowerPoint to HTML Converter - Clean Light Theme */

:root {
    --primary-color: #007bff;
    --primary-light: #e3f2fd;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --bg-light: #f8f9fa;
}

/* File upload area styling */
.file-upload-area {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 0.375rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.2s ease;
    background: #fff;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.file-upload-area.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: scale(1.01);
}

.file-upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.file-upload-message {
    pointer-events: none;
    z-index: 1;
}

/* Progress container styling */
.progress-container {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
}

/* Clean card styling */
.card {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
}

.card-body {
    padding: 1.25rem;
}

/* Step styling */
.step-item {
    border-left: 3px solid var(--primary-light);
    padding-left: 1rem;
    margin-left: 0.75rem;
}

/* Button styling */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    font-weight: 500;
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Form styling */
.form-label {
    font-weight: 500;
    color: #212529;
    margin-bottom: 0.5rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #212529;
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 0 0 4px 4px;
    z-index: 1000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
    color: white;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .file-upload-area {
        padding: 1.5rem 1rem;
        min-height: 150px;
    }
    
    .file-upload-area .fa-3x {
        font-size: 2rem !important;
    }
    
    .display-4 {
        font-size: 2rem !important;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .file-upload-area {
        padding: 1rem;
        min-height: 120px;
    }
}

/* Enhanced button styling */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

/* Card enhancements */
.card {
    border: 1px solid var(--bs-border-color);
    transition: box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Alert improvements */
.alert {
    border: none;
    border-radius: 0.5rem;
}

.alert .fas {
    margin-right: 0.5rem;
}

/* Input group enhancements */
.input-group .form-control:focus {
    border-color: hsl(var(--primary-color));
    box-shadow: 0 0 0 0.2rem hsl(var(--primary-color) / 0.25);
}

/* Loading spinner customization */
.spinner-border {
    width: 2.5rem;
    height: 2.5rem;
}

/* Accessibility improvements */
.form-control:focus,
.btn:focus {
    outline: 2px solid hsl(var(--primary-color));
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .file-upload-area {
        border-width: 3px;
    }
    
    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .file-upload-area,
    .btn,
    .card {
        transition: none;
    }
    
    .file-upload-area.drag-over {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

/* Print styles */
@media print {
    .navbar,
    .btn,
    .progress-container,
    footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000;
        box-shadow: none;
    }
    
    .container {
        max-width: none;
        margin: 0;
        padding: 0;
    }
}

/* Dark mode enhancements */
[data-bs-theme="dark"] .file-upload-area {
    background: hsl(var(--dark-color) / 0.2);
    border-color: hsl(var(--light-color) / 0.2);
}

[data-bs-theme="dark"] .file-upload-area:hover {
    background: hsl(var(--primary-color) / 0.1);
    border-color: hsl(var(--primary-color) / 0.5);
}

[data-bs-theme="dark"] .progress-container {
    background: hsl(var(--dark-color) / 0.3);
    border-color: hsl(var(--light-color) / 0.1);
}

/* Focus visible for better keyboard navigation */
.btn:focus-visible,
.form-control:focus-visible,
.card:focus-visible {
    outline: 2px solid hsl(var(--primary-color));
    outline-offset: 2px;
}

/* Custom scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bs-body-bg);
}

::-webkit-scrollbar-thumb {
    background: hsl(var(--primary-color) / 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: hsl(var(--primary-color) / 0.7);
}

/* Error page specific styles */
.error-page .display-4 {
    color: hsl(var(--warning-color));
}

/* Success indicators */
.success-check {
    animation: checkmark 0.6s ease-in-out;
}

@keyframes checkmark {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Loading states */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading::after {
    content: "";
    display: inline-block;
    width: 1rem;
    height: 1rem;
    margin-left: 0.5rem;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}