/* Custom styles for the FFMPEG Video Merger application */

body {
    background: var(--bs-dark);
    min-height: 100vh;
}

.card {
    border: 1px solid var(--bs-border-color);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

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

.btn-primary {
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.progress {
    height: 8px;
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

.alert {
    border: none;
    border-radius: 8px;
}

.alert-success {
    background-color: rgba(25, 135, 84, 0.1);
    border-left: 4px solid var(--bs-success);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 4px solid var(--bs-danger);
}

.card-header {
    border-bottom: 1px solid var(--bs-border-color);
    background-color: rgba(var(--bs-secondary-rgb), 0.1);
}

.text-success {
    color: var(--bs-success) !important;
}

.text-danger {
    color: var(--bs-danger) !important;
}

.text-muted {
    opacity: 0.7;
}

/* File input styling */
.form-control[type="file"] {
    padding: 0.5rem 0.75rem;
}

.form-control[type="file"]::-webkit-file-upload-button {
    background-color: var(--bs-secondary);
    border: 1px solid var(--bs-border-color);
    border-radius: 4px;
    color: var(--bs-body-color);
    padding: 0.25rem 0.5rem;
    margin-right: 0.75rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
    background-color: var(--bs-gray-600);
}

/* Animation for result container */
#resultContainer {
    animation: fadeInUp 0.5s ease-out;
}

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

/* Loading state button */
.btn.loading {
    position: relative;
    pointer-events: none;
}

.btn.loading .btn-text {
    opacity: 0;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1rem;
    height: 1rem;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}